Mostly clear night
Feels like 5°C
Wind direction east
Gusts 33 km/h
Humidity 90%
Cloud cover 18%
Pressure 1031 hPa
Now · 4:21 AM
St. Marys Weather & Hourly Forecast
Canada · Ontario
9°C
Clear night
Feels like: 4°C
💧 Humidity 88%
🌡 Pressure 1031 hPa
💨 Wind 18 km/h
👁 Visibility 28.5 km
☁ Clouds 2%
☀️ UV index 0.0 · Low
🌅 Sunrise 7:11 AM
🌇 Sunset 7:21 PM
Hourly Forecast for St. Marys
Today
Mostly clear night
Sunny
Feels like 5°C
Wind direction east
Gusts 32 km/h
Humidity 90%
Cloud cover 2%
Pressure 1032 hPa
Sunny
Feels like 10°C
Wind direction east
Gusts 51 km/h
Humidity 67%
Cloud cover 2%
Pressure 1032 hPa
Sunny
Feels like 11°C
Wind direction east
Gusts 49 km/h
Humidity 47%
Cloud cover 11%
Pressure 1031 hPa
Mostly sunny
Feels like 11°C
Wind direction east
Gusts 45 km/h
Humidity 55%
Cloud cover 13%
Pressure 1030 hPa
Clear night
Feels like 7°C
Wind direction east
Gusts 37 km/h
Humidity 60%
Cloud cover 0%
Pressure 1031 hPa
Mostly clear night
Feels like 7°C
Wind direction east
Gusts 39 km/h
Humidity 77%
Cloud cover 28%
Pressure 1031 hPa
Tomorrow
Mostly clear night
Feels like 7°C
Wind direction east
Gusts 35 km/h
Humidity 85%
Cloud cover 16%
Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction east
Gusts 24 km/h
Humidity 95%
Cloud cover 1%
Pressure 1031 hPa
Sunny
Feels like 7°C
Wind direction east
Gusts 23 km/h
Humidity 96%
Cloud cover 0%
Pressure 1032 hPa
Sunny
Feels like 12°C
Wind direction east
Gusts 31 km/h
Humidity 67%
Cloud cover 0%
Pressure 1032 hPa
Sunny
Feels like 13°C
Wind direction east
Gusts 36 km/h
Humidity 51%
Cloud cover 0%
Pressure 1030 hPa
Sunny
Feels like 13°C
Wind direction east
Gusts 31 km/h
Humidity 49%
Cloud cover 0%
Pressure 1028 hPa
Clear night
Feels like 10°C
Wind direction east
Gusts 15 km/h
Humidity 77%
Cloud cover 0%
Pressure 1029 hPa
Clear night
Feels like 7°C
Wind direction east
Gusts 18 km/h
Humidity 83%
Cloud cover 0%
Pressure 1029 hPa
Friday
Clear night
Feels like 6°C
Wind direction east
Gusts 14 km/h
Humidity 94%
Cloud cover 2%
Pressure 1028 hPa
Today
Mostly clear night
Feels like 5°C
Wind direction eastGusts 33 km/h
Humidity 90%Cloud cover 18%Pressure 1031 hPa
Clear night
Feels like 5°C
Wind direction eastGusts 33 km/h
Humidity 91%Cloud cover 1%Pressure 1031 hPa
Clear night
Feels like 5°C
Wind direction eastGusts 33 km/h
Humidity 92%Cloud cover 1%Pressure 1031 hPa
Sunny
Feels like 5°C
Wind direction eastGusts 32 km/h
Humidity 90%Cloud cover 2%Pressure 1032 hPa
Partly cloudy
Feels like 8°C
Wind direction eastGusts 38 km/h
Humidity 85%Cloud cover 51%Pressure 1032 hPa
Mostly cloudy
Feels like 9°C
Wind direction eastGusts 43 km/h
Humidity 78%Cloud cover 66%Pressure 1032 hPa
Sunny
Feels like 10°C
Wind direction eastGusts 51 km/h
Humidity 67%Cloud cover 2%Pressure 1032 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 50 km/h
Humidity 59%Cloud cover 6%Pressure 1032 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 50 km/h
Humidity 53%Cloud cover 5%Pressure 1031 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 49 km/h
Humidity 47%Cloud cover 11%Pressure 1031 hPa
Mostly sunny
Feels like 11°C
Wind direction eastGusts 48 km/h
Humidity 44%Cloud cover 27%Pressure 1031 hPa
Mostly sunny
Feels like 12°C
Wind direction eastGusts 46 km/h
Humidity 50%Cloud cover 15%Pressure 1030 hPa
Mostly sunny
Feels like 11°C
Wind direction eastGusts 45 km/h
Humidity 55%Cloud cover 13%Pressure 1030 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 42 km/h
Humidity 60%Cloud cover 10%Pressure 1030 hPa
Sunny
Feels like 9°C
Wind direction eastGusts 38 km/h
Humidity 61%Cloud cover 0%Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 37 km/h
Humidity 60%Cloud cover 0%Pressure 1031 hPa
Clear night
Feels like 6°C
Wind direction eastGusts 39 km/h
Humidity 65%Cloud cover 1%Pressure 1031 hPa
Clear night
Feels like 6°C
Wind direction eastGusts 40 km/h
Humidity 75%Cloud cover 6%Pressure 1032 hPa
Mostly clear night
Feels like 7°C
Wind direction eastGusts 39 km/h
Humidity 77%Cloud cover 28%Pressure 1031 hPa
Tomorrow
Partly cloudy night
Feels like 7°C
Wind direction eastGusts 38 km/h
Humidity 77%Cloud cover 55%Pressure 1031 hPa
Partly cloudy night
Feels like 7°C
Wind direction eastGusts 37 km/h
Humidity 81%Cloud cover 52%Pressure 1031 hPa
Mostly clear night
Feels like 7°C
Wind direction eastGusts 35 km/h
Humidity 85%Cloud cover 16%Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 32 km/h
Humidity 87%Cloud cover 1%Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 29 km/h
Humidity 93%Cloud cover 1%Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 24 km/h
Humidity 95%Cloud cover 1%Pressure 1031 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 24 km/h
Humidity 96%Cloud cover 1%Pressure 1032 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 24 km/h
Humidity 97%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 7°C
Wind direction eastGusts 23 km/h
Humidity 96%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 9°C
Wind direction eastGusts 24 km/h
Humidity 90%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 27 km/h
Humidity 79%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 12°C
Wind direction eastGusts 31 km/h
Humidity 67%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 12°C
Wind direction eastGusts 35 km/h
Humidity 59%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 35 km/h
Humidity 56%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 36 km/h
Humidity 51%Cloud cover 0%Pressure 1030 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 36 km/h
Humidity 45%Cloud cover 0%Pressure 1029 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 35 km/h
Humidity 45%Cloud cover 0%Pressure 1029 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 31 km/h
Humidity 49%Cloud cover 0%Pressure 1028 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 28 km/h
Humidity 56%Cloud cover 0%Pressure 1028 hPa
Sunny
Feels like 12°C
Wind direction eastGusts 21 km/h
Humidity 69%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 10°C
Wind direction eastGusts 15 km/h
Humidity 77%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 8°C
Wind direction eastGusts 17 km/h
Humidity 77%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 8°C
Wind direction eastGusts 18 km/h
Humidity 78%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 18 km/h
Humidity 83%Cloud cover 0%Pressure 1029 hPa
Friday
Clear night
Feels like 7°C
Wind direction eastGusts 18 km/h
Humidity 89%Cloud cover 0%Pressure 1028 hPa
Clear night
Feels like 7°C
Wind direction eastGusts 16 km/h
Humidity 92%Cloud cover 10%Pressure 1028 hPa
Clear night
Feels like 6°C
Wind direction eastGusts 14 km/h
Humidity 94%Cloud cover 2%Pressure 1028 hPa
Clear night
Feels like 6°C
Wind direction eastGusts 13 km/h
Humidity 95%Cloud cover 3%Pressure 1028 hPa
Clear night
Feels like 5°C
Wind direction northeastGusts 11 km/h
Humidity 96%Cloud cover 10%Pressure 1028 hPa
Clear night
Feels like 5°C
Wind direction northeastGusts 11 km/h
Humidity 97%Cloud cover 11%Pressure 1028 hPa
Mostly clear night
Feels like 4°C
Wind direction northeastGusts 14 km/h
Humidity 96%Cloud cover 20%Pressure 1028 hPa
Mostly clear night
Feels like 4°C
Wind direction northeastGusts 14 km/h
Humidity 93%Cloud cover 26%Pressure 1028 hPa
Mostly sunny
Feels like 5°C
Wind direction northeastGusts 14 km/h
Humidity 89%Cloud cover 25%Pressure 1028 hPa
Partly cloudy
Feels like 8°C
Wind direction northeastGusts 17 km/h
Humidity 81%Cloud cover 55%Pressure 1028 hPa
Mostly sunny
Feels like 12°C
Wind direction northeastGusts 16 km/h
Humidity 72%Cloud cover 33%Pressure 1029 hPa
Mostly sunny
Feels like 13°C
Wind direction northeastGusts 23 km/h
Humidity 54%Cloud cover 34%Pressure 1028 hPa
Partly cloudy
Feels like 14°C
Wind direction northeastGusts 23 km/h
Humidity 52%Cloud cover 57%Pressure 1028 hPa
Mostly cloudy
Feels like 16°C
Wind direction northeastGusts 22 km/h
Humidity 51%Cloud cover 79%Pressure 1027 hPa
Mostly cloudy
Feels like 17°C
Wind direction northeastGusts 20 km/h
Humidity 50%Cloud cover 93%Pressure 1027 hPa
Overcast
Feels like 17°C
Wind direction northeastGusts 20 km/h
Humidity 49%Cloud cover 99%Pressure 1026 hPa
Overcast
Feels like 17°C
Wind direction northeastGusts 19 km/h
Humidity 50%Cloud cover 99%Pressure 1025 hPa
Overcast
Feels like 17°C
Wind direction northeastGusts 18 km/h
Humidity 51%Cloud cover 100%Pressure 1025 hPa
Overcast
Feels like 18°C
Wind direction northeastGusts 15 km/h
Humidity 60%Cloud cover 100%Pressure 1025 hPa
Overcast
Feels like 17°C
Wind direction northeastGusts 6 km/h
Humidity 69%Cloud cover 96%Pressure 1025 hPa
Partly cloudy night
Feels like 13°C
Wind direction northeastGusts 5 km/h
Humidity 76%Cloud cover 51%Pressure 1025 hPa
Clear night
Feels like 10°C
Wind direction eastGusts 13 km/h
Humidity 85%Cloud cover 7%Pressure 1026 hPa
Saturday
Clear night
Feels like 8°C
Wind direction northeastGusts 13 km/h
Humidity 90%Cloud cover 0%Pressure 1025 hPa
Clear night
Feels like 7°C
Wind direction northeastGusts 17 km/h
Humidity 87%Cloud cover 0%Pressure 1025 hPa
Sunny
Feels like 7°C
Wind direction northeastGusts 17 km/h
Humidity 86%Cloud cover 0%Pressure 1025 hPa
Mostly sunny
Feels like 17°C
Wind direction eastGusts 19 km/h
Humidity 60%Cloud cover 16%Pressure 1026 hPa
Sunny
Feels like 19°C
Wind direction eastGusts 20 km/h
Humidity 40%Cloud cover 0%Pressure 1024 hPa
Sunny
Feels like 19°C
Wind direction northeastGusts 17 km/h
Humidity 42%Cloud cover 0%Pressure 1022 hPa
Mostly clear night
Feels like 14°C
Wind direction northGusts 13 km/h
Humidity 68%Cloud cover 12%Pressure 1022 hPa
Clear night
Feels like 11°C
Wind direction northeastGusts 21 km/h
Humidity 75%Cloud cover 0%Pressure 1023 hPa
Sunday
Clear night
Feels like 8°C
Wind direction northeastGusts 19 km/h
Humidity 82%Cloud cover 0%Pressure 1022 hPa
Partly cloudy night
Feels like 8°C
Wind direction northeastGusts 14 km/h
Humidity 84%Cloud cover 62%Pressure 1021 hPa
Overcast
Feels like 8°C
Wind direction northeastGusts 13 km/h
Humidity 84%Cloud cover 100%Pressure 1021 hPa
Mostly sunny
Feels like 17°C
Wind direction northeastGusts 22 km/h
Humidity 50%Cloud cover 16%Pressure 1021 hPa
Overcast
Feels like 18°C
Wind direction northGusts 28 km/h
Humidity 41%Cloud cover 99%Pressure 1019 hPa
Mostly cloudy
Feels like 18°C
Wind direction northGusts 27 km/h
Humidity 48%Cloud cover 91%Pressure 1017 hPa
Overcast night
Feels like 14°C
Wind direction northGusts 24 km/h
Humidity 74%Cloud cover 97%Pressure 1017 hPa
Partly cloudy night
Feels like 10°C
Wind direction northGusts 16 km/h
Humidity 82%Cloud cover 41%Pressure 1017 hPa
Monday
Mostly clear night
Feels like 9°C
Wind direction northGusts 16 km/h
Humidity 87%Cloud cover 20%Pressure 1016 hPa
Mostly clear night
Feels like 8°C
Wind direction northGusts 19 km/h
Humidity 91%Cloud cover 16%Pressure 1016 hPa
Sunny
Feels like 9°C
Wind direction northGusts 19 km/h
Humidity 93%Cloud cover 0%Pressure 1016 hPa
Sunny
Feels like 17°C
Wind direction northGusts 22 km/h
Humidity 66%Cloud cover 0%Pressure 1016 hPa
Sunny
Feels like 20°C
Wind direction northGusts 25 km/h
Humidity 47%Cloud cover 0%Pressure 1015 hPa
Mostly sunny
Feels like 20°C
Wind direction northwestGusts 21 km/h
Humidity 52%Cloud cover 18%Pressure 1014 hPa
Clear night
Feels like 14°C
Wind direction northwestGusts 26 km/h
Humidity 83%Cloud cover 2%Pressure 1015 hPa
Tuesday
Clear night
Feels like 11°C
Wind direction northeastGusts —
Humidity 94%Cloud cover 0%Pressure 1015 hPa
Overcast
Feels like 9°C
Wind direction eastGusts —
Humidity 99%Cloud cover 96%Pressure 1016 hPa
Mostly cloudy
Feels like 20°C
Wind direction southGusts —
Humidity 59%Cloud cover 93%Pressure 1015 hPa
Clear night
Feels like 15°C
Wind direction southeastGusts —
Humidity 84%Cloud cover 0%Pressure 1013 hPa
Wednesday
Partly cloudy night
Feels like 14°C
Wind direction southeastGusts —
Humidity 88%Cloud cover 55%Pressure 1011 hPa
Overcast
Feels like 15°C
Wind direction southeastGusts —
Humidity 86%Cloud cover 100%Pressure 1009 hPa
Mostly cloudy
Feels like 22°C
Wind direction southGusts —
Humidity 66%Cloud cover 86%Pressure 1007 hPa
Moderate rain
Feels like 19°C
Wind direction southGusts —
Humidity 92%Cloud cover 100%Pressure 1007 hPa
Thursday
Moderate rain
Feels like 19°C
Wind direction southGusts —
Humidity 95%Cloud cover 100%Pressure 1007 hPa
Light rain
Feels like 16°C
Wind direction southeastGusts —
Humidity 92%Cloud cover 100%Pressure 1004 hPa
Light rain
Feels like 16°C
Wind direction southGusts —
Humidity 95%Cloud cover 100%Pressure 999 hPa
Moderate rain
Feels like 14°C
Wind direction southwestGusts —
Humidity 95%Cloud cover 99%Pressure 1002 hPa
Friday
Moderate rain
Feels like 11°C
Wind direction southwestGusts —
Humidity 96%Cloud cover 96%Pressure 1004 hPa
Overcast
Feels like 7°C
Wind direction westGusts —
Humidity 81%Cloud cover 99%Pressure 1009 hPa
Overcast
Feels like 7°C
Wind direction westGusts —
Humidity 64%Cloud cover 100%Pressure 1011 hPa
Light rain
Feels like 7°C
Wind direction westGusts —
Humidity 86%Cloud cover 74%Pressure 1014 hPa
Saturday
Mostly clear night
Feels like 4°C
Wind direction westGusts —
Humidity 86%Cloud cover 14%Pressure 1016 hPa
Light rain
Feels like 5°C
Wind direction northwestGusts —
Humidity 93%Cloud cover 92%Pressure 1019 hPa
Mostly cloudy
Feels like 7°C
Wind direction northwestGusts —
Humidity 61%Cloud cover 86%Pressure 1021 hPa
Overcast night
Feels like 7°C
Wind direction westGusts —
Humidity 74%Cloud cover 100%Pressure 1022 hPa
Sunday
Overcast night
Feels like 7°C
Wind direction southwestGusts —
Humidity 77%Cloud cover 99%Pressure 1024 hPa
Overcast
Feels like 6°C
Wind direction westGusts —
Humidity 74%Cloud cover 96%Pressure 1025 hPa
Partly cloudy
Feels like 10°C
Wind direction southwestGusts —
Humidity 51%Cloud cover 41%Pressure 1024 hPa
Overcast night
Feels like 10°C
Wind direction southGusts —
Humidity 69%Cloud cover 100%Pressure 1023 hPa
Monday
Overcast night
Feels like 7°C
Wind direction southwestGusts —
Humidity 84%Cloud cover 100%Pressure 1022 hPa
Partly cloudy
Feels like 6°C
Wind direction southwestGusts —
Humidity 82%Cloud cover 55%Pressure 1022 hPa
Mostly cloudy
Feels like 12°C
Wind direction southwestGusts —
Humidity 57%Cloud cover 91%Pressure 1020 hPa
Mostly cloudy night
Feels like 9°C
Wind direction southGusts —
Humidity 72%Cloud cover 82%Pressure 1018 hPa
Tuesday
Overcast night
Feels like 11°C
Wind direction southwestGusts —
Humidity 78%Cloud cover 97%Pressure 1016 hPa
Overcast
Feels like 10°C
Wind direction southwestGusts —
Humidity 89%Cloud cover 98%Pressure 1013 hPa
Light rain
Feels like 15°C
Wind direction southwestGusts —
Humidity 75%Cloud cover 100%Pressure 1007 hPa
Mostly clear night
Feels like 12°C
Wind direction westGusts —
Humidity 89%Cloud cover 24%Pressure 1007 hPa
Wednesday
Clear night
Feels like 6°C
Wind direction westGusts —
Humidity 69%Cloud cover 2%Pressure 1009 hPa
Light rain
Feels like 4°C
Wind direction northwestGusts —
Humidity 81%Cloud cover 23%Pressure 1010 hPa
Light rain
Feels like 4°C
Wind direction northwestGusts —
Humidity 75%Cloud cover 70%Pressure 1011 hPa
Partly cloudy night
Feels like 3°C
Wind direction northwestGusts —
Humidity 88%Cloud cover 74%Pressure 1012 hPa
In St. Marys and, more broadly, across the province of Ontario: This morning across the region, mainly cloudy skies are expected to persist, with temperatures ranging from about 8 to 17 degrees Celsius. In many areas, conditions are expected to remain dry through the early hours. During the afternoon, skies will likely stay mostly cloudy, with temperatures remaining steady within the same range. Winds will predominantly come from the northeast at around 14 km/h, with gusts reaching up to 32 km/h at times. Overall, little to no precipitation is anticipated today, but the breeze from the northeast may cause some minor disturbances locally. No significant weather hazards are expected in the coming hours.
15-Day Weather Outlook for St. Marys
TomorrowTomorrow
Partly cloudy
18°/10°
💧 None
💨 22 km/h
Partly cloudy
18°/10°
💧 None
💨 22 km/h
Daytime temperature 16°C
Feels like 12°C
Humidity 74%
Pressure 1030 hPa
Cloud cover 5%
Wind direction east
Gusts 38 km/h
Sunrise —
Sunset —
Friday, Sep 25Fri Sep 25
Mostly sunny
19°/7°
💧 None
💨 10 km/h
Mostly sunny
19°/7°
💧 None
💨 10 km/h
Daytime temperature 17°C
Feels like 14°C
Humidity 75%
Pressure 1027 hPa
Cloud cover 46%
Wind direction northeast
Gusts 23 km/h
Sunrise —
Sunset —
Saturday, Sep 26Sat Sep 26
Mostly sunny
21°/9°
💧 None
💨 12 km/h
Mostly sunny
21°/9°
💧 None
💨 12 km/h
Daytime temperature 18°C
Feels like 17°C
Humidity 68%
Pressure 1024 hPa
Cloud cover 4%
Wind direction east
Gusts 21 km/h
Sunrise —
Sunset —
Sunday, Sep 27Sun Sep 27
Partly cloudy
21°/10°
💧 None
💨 13 km/h
Partly cloudy
21°/10°
💧 None
💨 13 km/h
Daytime temperature 19°C
Feels like 17°C
Humidity 68%
Pressure 1019 hPa
Cloud cover 63%
Wind direction northeast
Gusts 28 km/h
Sunrise —
Sunset —
Monday, Sep 28Mon Sep 28
Mostly sunny
21°/11°
💧 None
💨 11 km/h
Mostly sunny
21°/11°
💧 None
💨 11 km/h
Daytime temperature 18°C
Feels like 17°C
Humidity 74%
Pressure 1015 hPa
Cloud cover 8%
Wind direction north
Gusts 26 km/h
Sunrise —
Sunset —
Tuesday, Sep 29Tue Sep 29
Overcast
21°/10°
💧 None
💨 11 km/h
Overcast
21°/10°
💧 None
💨 11 km/h
Daytime temperature 21°C
Feels like 20°C
Humidity 84%
Pressure 1015 hPa
Cloud cover 47%
Wind direction south
Gusts —
Sunrise —
Sunset —
Wednesday, Sep 30Wed Sep 30
Moderate rain
25°/15°
💧 3.7 mm
💨 28 km/h
Moderate rain
25°/15°
💧 3.7 mm
💨 28 km/h
Daytime temperature 25°C
Feels like 22°C
Humidity 83%
Pressure 1008 hPa
Cloud cover 85%
Wind direction south
Gusts —
Sunrise —
Sunset —
Thursday, Oct 1Thu Oct 1
Moderate rain
19°/17°
💧 28 mm
💨 34 km/h
Moderate rain
19°/17°
💧 28 mm
💨 34 km/h
Daytime temperature 19°C
Feels like 16°C
Humidity 94%
Pressure 1003 hPa
Cloud cover 100%
Wind direction south
Gusts —
Sunrise —
Sunset —
Friday, Oct 2Fri Oct 2
Moderate rain
14°/10°
💧 6.3 mm
💨 19 km/h
Moderate rain
14°/10°
💧 6.3 mm
💨 19 km/h
Daytime temperature 12°C
Feels like 7°C
Humidity 82%
Pressure 1010 hPa
Cloud cover 92%
Wind direction west
Gusts —
Sunrise —
Sunset —
Saturday, Oct 3Sat Oct 3
Light rain
12°/7°
💧 1.9 mm
💨 18 km/h
Light rain
12°/7°
💧 1.9 mm
💨 18 km/h
Daytime temperature 12°C
Feels like 7°C
Humidity 78%
Pressure 1020 hPa
Cloud cover 73%
Wind direction northwest
Gusts —
Sunrise —
Sunset —
Sunday, Oct 4Sun Oct 4
Overcast
14°/9°
💧 0.0 mm
💨 15 km/h
Overcast
14°/9°
💧 0.0 mm
💨 15 km/h
Daytime temperature 14°C
Feels like 10°C
Humidity 68%
Pressure 1024 hPa
Cloud cover 84%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Monday, Oct 5Mon Oct 5
Overcast
17°/9°
💧 None
💨 21 km/h
Overcast
17°/9°
💧 None
💨 21 km/h
Daytime temperature 17°C
Feels like 12°C
Humidity 74%
Pressure 1020 hPa
Cloud cover 82%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Tuesday, Oct 6Tue Oct 6
Light rain
20°/14°
💧 2.9 mm
💨 30 km/h
Light rain
20°/14°
💧 2.9 mm
💨 30 km/h
Daytime temperature 20°C
Feels like 15°C
Humidity 83%
Pressure 1011 hPa
Cloud cover 80%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Wednesday, Oct 7Wed Oct 7
Light rain
11°/7°
💧 6.1 mm
💨 23 km/h
Light rain
11°/7°
💧 6.1 mm
💨 23 km/h
Daytime temperature 10°C
Feels like 4°C
Humidity 78%
Pressure 1010 hPa
Cloud cover 42%
Wind direction northwest
Gusts —
Sunrise —
Sunset —
TEMPERATURE OUTLOOK
Temperature & Weather Trends in St. Marys
AIR QUALITY FORECAST
Air Quality Forecast for St. Marys
Fair
Nearest forecast value
5:00 AM
PM2.5 Fine particles Good 1,9µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 2,3µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 66,0µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,9µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 2,1µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 2,4µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 72,8µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,3µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 3,3µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 3,8µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 84,4µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,4µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 5,4µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 6,6µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 92,2µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 4,2µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 2,2µg/m³
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
PM10 Particulate matter Good 2,9µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 82,1µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,1µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
UV & HEALTH
UV, Sun & Health Outlook in St. Marys
Maximum daily UV
Today, tomorrow and the following day show the maximum UV index forecast for each day.
0–2 Low
3–5 Moderate
6–7 High
8–10 Very high
11+ Extreme
Today
UV 5,2Moderate
🙂Fair
Tomorrow
UV 5,0Moderate
🙂Fair
Friday
UV 4,9Moderate
😐Moderate
Saturday
UV 4,7Moderate
😐Moderate
Sunday
UV 6,0High
🙂Fair
Monday
UV 6,0High
—Unavailable
Tuesday
UV 6,0High
—Unavailable
Hourly UV index today
7:00 AMUV 0,0
8:00 AMUV 0,1
9:00 AMUV 0,6
10:00 AMUV 1,7
11:00 AMUV 3,1
12:00 PMUV 4,4
1:00 PMUV 5,2
2:00 PMUV 5,1
3:00 PMUV 4,2
4:00 PMUV 2,8
5:00 PMUV 1,4
6:00 PMUV 0,5
Today's weather health advice
Open today's recommendations.
Moderate UV risk
Sunglasses and sun protection are recommended for prolonged exposure.
Acceptable air quality
Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.
Comfortable temperature conditions
Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.
Good conditions for outdoor activities
Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.
WIND OUTLOOK
Hourly Wind Forecast for St. Marys
Sustained wind
Max gusts
NIGHT SKY · ST. MARYS, ONTARIO
Tonight's Stargazing & Shooting Stars
Excellent observing conditions. Best local viewing window: 6:00 AM–7:00 AM.
97/100Best-hour score
BEST TIME TONIGHT
6:00 AM–7:00 AM
Astronomical darkness: 8:58 PM–5:37 AM
Cloud cover
1%
Real hourly forecast for the best viewing hour.
Moonlight
89%
Waxing Gibbous · Moon below the horizon at the best viewing hour.
Meteor activity
Southern Taurids
Reference ZHR 7 · Radiant 57° high at the best hour.
Estimated visible meteors
1–4/hour
Local estimate after weather, moonlight and radiant-height adjustments.
Chance ≥1 meteor in 30 min70%
UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.
SEP 20–NOV 20
Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak
ACTIVE NOW
OCT 2–NOV 7
OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak
UPCOMING
OCT 20–DEC 10
Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak
UPCOMING
NOV 6–NOV 30
LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak
UPCOMING
Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.
DISCOVER WEATHER NEARBY Weather in other cities
Explore current conditions and forecasts for other locations.
Forecast data for St. Marys were last refreshed today at 3:47 AM. The current forecast period extends through 25/09/2026 at 2:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.