Mostly cloudy
Feels like 13°C
Wind direction northeast
Gusts 44 km/h
Humidity 63%
Cloud cover 90%
Pressure 1032 hPa
Now · 1:28 PM
St. Catharines Weather & Hourly Forecast
Canada · Ontario
17°C
Partly cloudy
Feels like: 13°C
💧 Humidity 61%
🌡 Pressure 1032 hPa
💨 Wind 22 km/h
👁 Visibility 43.4 km
☁ Clouds 55%
☀️ UV index 5.1 · Moderate
🌅 Sunrise 7:04 AM
🌇 Sunset 7:14 PM
Hourly Forecast for St. Catharines
Today
Mostly cloudy
Mostly cloudy
Feels like 12°C
Wind direction northeast
Gusts 50 km/h
Humidity 68%
Cloud cover 73%
Pressure 1031 hPa
Mostly clear night
Feels like 12°C
Wind direction east
Gusts 40 km/h
Humidity 68%
Cloud cover 23%
Pressure 1032 hPa
Clear night
Feels like 13°C
Wind direction east
Gusts 26 km/h
Humidity 78%
Cloud cover 0%
Pressure 1032 hPa
Tomorrow
Clear night
Feels like 13°C
Wind direction east
Gusts 19 km/h
Humidity 86%
Cloud cover 9%
Pressure 1031 hPa
Clear night
Feels like 11°C
Wind direction east
Gusts 18 km/h
Humidity 85%
Cloud cover 0%
Pressure 1031 hPa
Sunny
Feels like 11°C
Wind direction east
Gusts 15 km/h
Humidity 85%
Cloud cover 0%
Pressure 1032 hPa
Sunny
Feels like 14°C
Wind direction east
Gusts 23 km/h
Humidity 62%
Cloud cover 0%
Pressure 1032 hPa
Mostly sunny
Feels like 13°C
Wind direction northeast
Gusts 39 km/h
Humidity 66%
Cloud cover 20%
Pressure 1030 hPa
Sunny
Feels like 13°C
Wind direction northeast
Gusts 41 km/h
Humidity 65%
Cloud cover 0%
Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction east
Gusts 24 km/h
Humidity 67%
Cloud cover 0%
Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction southeast
Gusts 13 km/h
Humidity 77%
Cloud cover 0%
Pressure 1028 hPa
Friday
Clear night
Feels like 14°C
Wind direction southeast
Gusts 5 km/h
Humidity 84%
Cloud cover 0%
Pressure 1027 hPa
Mostly clear night
Feels like 15°C
Wind direction southeast
Gusts 5 km/h
Humidity 85%
Cloud cover 17%
Pressure 1027 hPa
Mostly sunny
Feels like 14°C
Wind direction northeast
Gusts 20 km/h
Humidity 80%
Cloud cover 16%
Pressure 1027 hPa
Sunny
Feels like 15°C
Wind direction north
Gusts 25 km/h
Humidity 73%
Cloud cover 0%
Pressure 1028 hPa
Today
Mostly cloudy
Feels like 13°C
Wind direction northeastGusts 44 km/h
Humidity 63%Cloud cover 90%Pressure 1032 hPa
Mostly cloudy
Feels like 12°C
Wind direction northeastGusts 49 km/h
Humidity 66%Cloud cover 89%Pressure 1032 hPa
Mostly cloudy
Feels like 12°C
Wind direction northeastGusts 50 km/h
Humidity 70%Cloud cover 81%Pressure 1031 hPa
Mostly cloudy
Feels like 12°C
Wind direction northeastGusts 50 km/h
Humidity 68%Cloud cover 73%Pressure 1031 hPa
Partly cloudy
Feels like 12°C
Wind direction northeastGusts 49 km/h
Humidity 66%Cloud cover 62%Pressure 1031 hPa
Partly cloudy
Feels like 12°C
Wind direction eastGusts 44 km/h
Humidity 66%Cloud cover 38%Pressure 1031 hPa
Mostly clear night
Feels like 12°C
Wind direction eastGusts 40 km/h
Humidity 68%Cloud cover 23%Pressure 1032 hPa
Clear night
Feels like 12°C
Wind direction eastGusts 35 km/h
Humidity 71%Cloud cover 4%Pressure 1032 hPa
Clear night
Feels like 13°C
Wind direction eastGusts 30 km/h
Humidity 75%Cloud cover 1%Pressure 1032 hPa
Clear night
Feels like 13°C
Wind direction eastGusts 26 km/h
Humidity 78%Cloud cover 0%Pressure 1032 hPa
Tomorrow
Clear night
Feels like 13°C
Wind direction eastGusts 23 km/h
Humidity 81%Cloud cover 3%Pressure 1032 hPa
Clear night
Feels like 13°C
Wind direction eastGusts 22 km/h
Humidity 84%Cloud cover 9%Pressure 1031 hPa
Clear night
Feels like 13°C
Wind direction eastGusts 19 km/h
Humidity 86%Cloud cover 9%Pressure 1031 hPa
Clear night
Feels like 12°C
Wind direction eastGusts 17 km/h
Humidity 85%Cloud cover 9%Pressure 1031 hPa
Clear night
Feels like 11°C
Wind direction eastGusts 19 km/h
Humidity 86%Cloud cover 0%Pressure 1031 hPa
Clear night
Feels like 11°C
Wind direction eastGusts 18 km/h
Humidity 85%Cloud cover 0%Pressure 1031 hPa
Clear night
Feels like 11°C
Wind direction eastGusts 17 km/h
Humidity 85%Cloud cover 0%Pressure 1032 hPa
Clear night
Feels like 11°C
Wind direction eastGusts 15 km/h
Humidity 87%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 11°C
Wind direction eastGusts 15 km/h
Humidity 85%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 12°C
Wind direction eastGusts 16 km/h
Humidity 81%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 19 km/h
Humidity 74%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 14°C
Wind direction eastGusts 23 km/h
Humidity 62%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 31 km/h
Humidity 56%Cloud cover 0%Pressure 1032 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 37 km/h
Humidity 63%Cloud cover 1%Pressure 1031 hPa
Mostly sunny
Feels like 13°C
Wind direction northeastGusts 39 km/h
Humidity 66%Cloud cover 20%Pressure 1030 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 40 km/h
Humidity 68%Cloud cover 4%Pressure 1029 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 42 km/h
Humidity 68%Cloud cover 1%Pressure 1029 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 41 km/h
Humidity 65%Cloud cover 0%Pressure 1029 hPa
Sunny
Feels like 13°C
Wind direction northeastGusts 38 km/h
Humidity 62%Cloud cover 0%Pressure 1029 hPa
Sunny
Feels like 14°C
Wind direction eastGusts 32 km/h
Humidity 63%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction eastGusts 24 km/h
Humidity 67%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction eastGusts 20 km/h
Humidity 71%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction eastGusts 17 km/h
Humidity 75%Cloud cover 0%Pressure 1029 hPa
Clear night
Feels like 14°C
Wind direction southeastGusts 13 km/h
Humidity 77%Cloud cover 0%Pressure 1028 hPa
Friday
Clear night
Feels like 14°C
Wind direction southeastGusts 8 km/h
Humidity 76%Cloud cover 0%Pressure 1028 hPa
Clear night
Feels like 15°C
Wind direction southGusts 5 km/h
Humidity 79%Cloud cover 0%Pressure 1028 hPa
Clear night
Feels like 14°C
Wind direction southeastGusts 5 km/h
Humidity 84%Cloud cover 0%Pressure 1027 hPa
Clear night
Feels like 14°C
Wind direction southeastGusts 6 km/h
Humidity 86%Cloud cover 2%Pressure 1027 hPa
Clear night
Feels like 15°C
Wind direction southeastGusts 6 km/h
Humidity 87%Cloud cover 5%Pressure 1026 hPa
Mostly clear night
Feels like 15°C
Wind direction southeastGusts 5 km/h
Humidity 85%Cloud cover 17%Pressure 1027 hPa
Mostly clear night
Feels like 15°C
Wind direction northeastGusts 6 km/h
Humidity 80%Cloud cover 32%Pressure 1027 hPa
Mostly clear night
Feels like 14°C
Wind direction northeastGusts 15 km/h
Humidity 81%Cloud cover 31%Pressure 1027 hPa
Mostly sunny
Feels like 14°C
Wind direction northeastGusts 20 km/h
Humidity 80%Cloud cover 16%Pressure 1027 hPa
Sunny
Feels like 14°C
Wind direction northeastGusts 23 km/h
Humidity 76%Cloud cover 9%Pressure 1028 hPa
Sunny
Feels like 15°C
Wind direction northeastGusts 25 km/h
Humidity 74%Cloud cover 0%Pressure 1028 hPa
Sunny
Feels like 15°C
Wind direction northGusts 25 km/h
Humidity 73%Cloud cover 0%Pressure 1028 hPa
Sunny
Feels like 15°C
Wind direction northGusts 26 km/h
Humidity 72%Cloud cover 0%Pressure 1027 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 26 km/h
Humidity 70%Cloud cover 0%Pressure 1027 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 26 km/h
Humidity 68%Cloud cover 0%Pressure 1026 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 25 km/h
Humidity 67%Cloud cover 0%Pressure 1026 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 25 km/h
Humidity 65%Cloud cover 0%Pressure 1025 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 25 km/h
Humidity 63%Cloud cover 0%Pressure 1025 hPa
Sunny
Feels like 16°C
Wind direction northeastGusts 25 km/h
Humidity 63%Cloud cover 0%Pressure 1025 hPa
Sunny
Feels like 17°C
Wind direction eastGusts 23 km/h
Humidity 65%Cloud cover 0%Pressure 1025 hPa
Clear night
Feels like 17°C
Wind direction eastGusts 14 km/h
Humidity 69%Cloud cover 0%Pressure 1025 hPa
Saturday
Clear night
Feels like 17°C
Wind direction northeastGusts 25 km/h
Humidity 75%Cloud cover 0%Pressure 1022 hPa
Sunny
Feels like 16°C
Wind direction northGusts 25 km/h
Humidity 76%Cloud cover 0%Pressure 1023 hPa
Overcast
Feels like 16°C
Wind direction northGusts 26 km/h
Humidity 72%Cloud cover 100%Pressure 1023 hPa
Mostly cloudy
Feels like 18°C
Wind direction northGusts 22 km/h
Humidity 61%Cloud cover 89%Pressure 1021 hPa
Mostly cloudy
Feels like 18°C
Wind direction northGusts 23 km/h
Humidity 45%Cloud cover 88%Pressure 1019 hPa
Overcast night
Feels like 16°C
Wind direction northGusts 37 km/h
Humidity 52%Cloud cover 95%Pressure 1019 hPa
Overcast night
Feels like 16°C
Wind direction northGusts 43 km/h
Humidity 69%Cloud cover 100%Pressure 1019 hPa
Sunday
Overcast night
Feels like 15°C
Wind direction northGusts 36 km/h
Humidity 67%Cloud cover 100%Pressure 1017 hPa
Overcast night
Feels like 14°C
Wind direction northGusts 38 km/h
Humidity 68%Cloud cover 98%Pressure 1017 hPa
Partly cloudy
Feels like 13°C
Wind direction northGusts 40 km/h
Humidity 69%Cloud cover 43%Pressure 1017 hPa
Partly cloudy
Feels like 13°C
Wind direction northeastGusts 40 km/h
Humidity 70%Cloud cover 45%Pressure 1017 hPa
Mostly cloudy
Feels like 15°C
Wind direction northeastGusts 37 km/h
Humidity 60%Cloud cover 91%Pressure 1016 hPa
Overcast
Feels like 19°C
Wind direction northeastGusts 33 km/h
Humidity 59%Cloud cover 100%Pressure 1014 hPa
Partly cloudy night
Feels like 17°C
Wind direction northeastGusts 29 km/h
Humidity 59%Cloud cover 70%Pressure 1014 hPa
Partly cloudy night
Feels like 15°C
Wind direction northeastGusts 40 km/h
Humidity 61%Cloud cover 46%Pressure 1014 hPa
Monday
Mostly clear night
Feels like 15°C
Wind direction northeastGusts 35 km/h
Humidity 65%Cloud cover 38%Pressure 1014 hPa
Mostly cloudy night
Feels like 13°C
Wind direction northeastGusts 32 km/h
Humidity 67%Cloud cover 93%Pressure 1014 hPa
Overcast
Feels like 13°C
Wind direction northeastGusts 34 km/h
Humidity 72%Cloud cover 98%Pressure 1015 hPa
Partly cloudy
Feels like 13°C
Wind direction northeastGusts 35 km/h
Humidity 75%Cloud cover 44%Pressure 1015 hPa
Partly cloudy
Feels like 15°C
Wind direction northeastGusts 34 km/h
Humidity 70%Cloud cover 48%Pressure 1014 hPa
Partly cloudy
Feels like 17°C
Wind direction eastGusts 24 km/h
Humidity 69%Cloud cover 73%Pressure 1014 hPa
Partly cloudy night
Feels like 19°C
Wind direction westGusts 12 km/h
Humidity 71%Cloud cover 53%Pressure 1014 hPa
Partly cloudy night
Feels like 18°C
Wind direction westGusts 14 km/h
Humidity 73%Cloud cover 59%Pressure 1014 hPa
Tuesday
Clear night
Feels like 17°C
Wind direction northwestGusts 19 km/h
Humidity 76%Cloud cover 3%Pressure 1014 hPa
Sunny
Feels like 19°C
Wind direction northwestGusts —
Humidity 71%Cloud cover 2%Pressure 1014 hPa
Mostly sunny
Feels like 18°C
Wind direction westGusts —
Humidity 85%Cloud cover 11%Pressure 1016 hPa
Partly cloudy night
Feels like 21°C
Wind direction northwestGusts —
Humidity 68%Cloud cover 65%Pressure 1015 hPa
Wednesday
Clear night
Feels like 21°C
Wind direction southGusts —
Humidity 63%Cloud cover 0%Pressure 1014 hPa
Sunny
Feels like 18°C
Wind direction southeastGusts —
Humidity 81%Cloud cover 9%Pressure 1013 hPa
Partly cloudy
Feels like 17°C
Wind direction southeastGusts —
Humidity 80%Cloud cover 70%Pressure 1011 hPa
Clear night
Feels like 23°C
Wind direction southGusts —
Humidity 61%Cloud cover 9%Pressure 1009 hPa
Thursday
Overcast night
Feels like 22°C
Wind direction southGusts —
Humidity 66%Cloud cover 96%Pressure 1007 hPa
Overcast
Feels like 23°C
Wind direction southwestGusts —
Humidity 79%Cloud cover 100%Pressure 1008 hPa
Overcast
Feels like 20°C
Wind direction southGusts —
Humidity 69%Cloud cover 99%Pressure 1006 hPa
Light rain
Feels like 18°C
Wind direction southGusts —
Humidity 74%Cloud cover 100%Pressure 1002 hPa
Friday
Overcast night
Feels like 17°C
Wind direction southwestGusts —
Humidity 90%Cloud cover 100%Pressure 1002 hPa
Sunny
Feels like 14°C
Wind direction southwestGusts —
Humidity 87%Cloud cover 6%Pressure 1005 hPa
Mostly sunny
Feels like 12°C
Wind direction southwestGusts —
Humidity 82%Cloud cover 20%Pressure 1007 hPa
Mostly clear night
Feels like 11°C
Wind direction westGusts —
Humidity 67%Cloud cover 22%Pressure 1010 hPa
Saturday
Mostly clear night
Feels like 10°C
Wind direction westGusts —
Humidity 62%Cloud cover 20%Pressure 1012 hPa
Mostly sunny
Feels like 8°C
Wind direction westGusts —
Humidity 77%Cloud cover 16%Pressure 1014 hPa
Sunny
Feels like 7°C
Wind direction northwestGusts —
Humidity 78%Cloud cover 6%Pressure 1017 hPa
Overcast night
Feels like 9°C
Wind direction westGusts —
Humidity 63%Cloud cover 100%Pressure 1020 hPa
Sunday
Overcast night
Feels like 9°C
Wind direction westGusts —
Humidity 54%Cloud cover 100%Pressure 1021 hPa
Mostly cloudy
Feels like 10°C
Wind direction northwestGusts —
Humidity 68%Cloud cover 78%Pressure 1024 hPa
Mostly sunny
Feels like 9°C
Wind direction southwestGusts —
Humidity 70%Cloud cover 20%Pressure 1025 hPa
Overcast night
Feels like 11°C
Wind direction southwestGusts —
Humidity 53%Cloud cover 100%Pressure 1024 hPa
Monday
Partly cloudy night
Feels like 12°C
Wind direction southwestGusts —
Humidity 62%Cloud cover 48%Pressure 1023 hPa
Mostly cloudy
Feels like 12°C
Wind direction southwestGusts —
Humidity 76%Cloud cover 92%Pressure 1022 hPa
Partly cloudy
Feels like 11°C
Wind direction southwestGusts —
Humidity 86%Cloud cover 64%Pressure 1022 hPa
Mostly cloudy night
Feels like 14°C
Wind direction southwestGusts —
Humidity 61%Cloud cover 78%Pressure 1020 hPa
Tuesday
Mostly cloudy night
Feels like 13°C
Wind direction southwestGusts —
Humidity 68%Cloud cover 77%Pressure 1019 hPa
Overcast
Feels like 13°C
Wind direction southwestGusts —
Humidity 74%Cloud cover 99%Pressure 1016 hPa
Partly cloudy
Feels like 13°C
Wind direction southwestGusts —
Humidity 80%Cloud cover 52%Pressure 1013 hPa
Mostly clear night
Feels like 13°C
Wind direction southwestGusts —
Humidity 71%Cloud cover 38%Pressure 1008 hPa
Wednesday
Moderate rain
Feels like 14°C
Wind direction southwestGusts —
Humidity 88%Cloud cover 74%Pressure 1005 hPa
Sunny
Feels like 10°C
Wind direction southwestGusts —
Humidity 66%Cloud cover 0%Pressure 1008 hPa
Sunny
Feels like 7°C
Wind direction westGusts —
Humidity 72%Cloud cover 6%Pressure 1008 hPa
Light rain
Feels like 7°C
Wind direction westGusts —
Humidity 60%Cloud cover 65%Pressure 1008 hPa
Thursday
Light rain
Feels like 6°C
Wind direction northwestGusts —
Humidity 67%Cloud cover 77%Pressure 1009 hPa
In St. Catharines 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. Catharines
TomorrowTomorrow
Mostly sunny
17°/12°
💧 None
💨 22 km/h
Mostly sunny
17°/12°
💧 None
💨 22 km/h
Daytime temperature 17°C
Feels like 13°C
Humidity 74%
Pressure 1030 hPa
Cloud cover 2%
Wind direction northeast
Gusts 42 km/h
Sunrise —
Sunset —
Friday, Sep 25Fri Sep 25
Mostly sunny
18°/14°
💧 None
💨 13 km/h
Mostly sunny
18°/14°
💧 None
💨 13 km/h
Daytime temperature 17°C
Feels like 15°C
Humidity 74%
Pressure 1027 hPa
Cloud cover 5%
Wind direction north
Gusts 26 km/h
Sunrise —
Sunset —
Saturday, Sep 26Sat Sep 26
Overcast
21°/18°
💧 None
💨 25 km/h
Overcast
21°/18°
💧 None
💨 25 km/h
Daytime temperature 18°C
Feels like 16°C
Humidity 64%
Pressure 1021 hPa
Cloud cover 67%
Wind direction north
Gusts 43 km/h
Sunrise —
Sunset —
Sunday, Sep 27Sun Sep 27
Overcast
21°/17°
💧 None
💨 25 km/h
Overcast
21°/17°
💧 None
💨 25 km/h
Daytime temperature 17°C
Feels like 13°C
Humidity 64%
Pressure 1016 hPa
Cloud cover 74%
Wind direction northeast
Gusts 40 km/h
Sunrise —
Sunset —
Monday, Sep 28Mon Sep 28
Mostly sunny
18°/16°
💧 None
💨 22 km/h
Mostly sunny
18°/16°
💧 None
💨 22 km/h
Daytime temperature 16°C
Feels like 13°C
Humidity 70%
Pressure 1014 hPa
Cloud cover 63%
Wind direction northeast
Gusts 35 km/h
Sunrise —
Sunset —
Tuesday, Sep 29Tue Sep 29
Mostly sunny
21°/18°
💧 None
💨 12 km/h
Mostly sunny
21°/18°
💧 None
💨 12 km/h
Daytime temperature 18°C
Feels like 18°C
Humidity 75%
Pressure 1015 hPa
Cloud cover 20%
Wind direction west
Gusts 19 km/h
Sunrise —
Sunset —
Wednesday, Sep 30Wed Sep 30
Partly cloudy
25°/18°
💧 None
💨 26 km/h
Partly cloudy
25°/18°
💧 None
💨 26 km/h
Daytime temperature 18°C
Feels like 17°C
Humidity 71%
Pressure 1012 hPa
Cloud cover 22%
Wind direction southeast
Gusts —
Sunrise —
Sunset —
Thursday, Oct 1Thu Oct 1
Light rain
25°/22°
💧 2.6 mm
💨 38 km/h
Light rain
25°/22°
💧 2.6 mm
💨 38 km/h
Daytime temperature 22°C
Feels like 20°C
Humidity 72%
Pressure 1006 hPa
Cloud cover 99%
Wind direction south
Gusts —
Sunrise —
Sunset —
Friday, Oct 2Fri Oct 2
Overcast
20°/15°
💧 2.0 mm
💨 29 km/h
Overcast
20°/15°
💧 2.0 mm
💨 29 km/h
Daytime temperature 15°C
Feels like 12°C
Humidity 82%
Pressure 1006 hPa
Cloud cover 37%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Saturday, Oct 3Sat Oct 3
Mostly sunny
15°/12°
💧 0.4 mm
💨 25 km/h
Mostly sunny
15°/12°
💧 0.4 mm
💨 25 km/h
Daytime temperature 12°C
Feels like 7°C
Humidity 70%
Pressure 1016 hPa
Cloud cover 36%
Wind direction northwest
Gusts —
Sunrise —
Sunset —
Sunday, Oct 4Sun Oct 4
Overcast
15°/12°
💧 0.2 mm
💨 23 km/h
Overcast
15°/12°
💧 0.2 mm
💨 23 km/h
Daytime temperature 12°C
Feels like 9°C
Humidity 61%
Pressure 1024 hPa
Cloud cover 74%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Monday, Oct 5Mon Oct 5
Partly cloudy
18°/13°
💧 0.0 mm
💨 23 km/h
Partly cloudy
18°/13°
💧 0.0 mm
💨 23 km/h
Daytime temperature 13°C
Feels like 11°C
Humidity 71%
Pressure 1022 hPa
Cloud cover 70%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Tuesday, Oct 6Tue Oct 6
Mostly cloudy
19°/16°
💧 0.0 mm
💨 37 km/h
Mostly cloudy
19°/16°
💧 0.0 mm
💨 37 km/h
Daytime temperature 17°C
Feels like 13°C
Humidity 73%
Pressure 1014 hPa
Cloud cover 66%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Wednesday, Oct 7Wed Oct 7
Moderate rain
18°/13°
💧 1.5 mm
💨 29 km/h
Moderate rain
18°/13°
💧 1.5 mm
💨 29 km/h
Daytime temperature 13°C
Feels like 7°C
Humidity 72%
Pressure 1007 hPa
Cloud cover 36%
Wind direction west
Gusts —
Sunrise —
Sunset —
Thursday, Oct 8Thu Oct 8
Light rain
12°/12°
💧 2.8 mm
💨 26 km/h
Light rain
12°/12°
💧 2.8 mm
💨 26 km/h
Daytime temperature 12°C
Feels like 6°C
Humidity 67%
Pressure 1009 hPa
Cloud cover 77%
Wind direction northwest
Gusts —
Sunrise —
Sunset —
TEMPERATURE OUTLOOK
Temperature & Weather Trends in St. Catharines
AIR QUALITY FORECAST
Air Quality Forecast for St. Catharines
Fair
Nearest forecast value
2:00 PM
PM2.5 Fine particles Good 1,4µg/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 1,5µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 77,6µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 0,8µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Good
Selected time
12:00 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 2,1µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Good 58,2µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 2,7µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is favorable for outdoor activities.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 2,3µg/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 2,6µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 69,5µg/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.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 4,0µg/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 4,5µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 68,9µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,8µg/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 2,0µg/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 2,5µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 76,7µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 3,6µg/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. Catharines
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 5,1Moderate
🙂Fair
Tomorrow
UV 4,9Moderate
🙂Fair
Friday
UV 4,9Moderate
🙂Fair
Saturday
UV 4,7Moderate
😐Moderate
Sunday
UV 6,0High
🙂Fair
Monday
UV 5,0Moderate
—Unavailable
Tuesday
UV 5,0Moderate
—Unavailable
Hourly UV index today
2:00 PMUV 4,9
3:00 PMUV 3,9
4:00 PMUV 2,5
5:00 PMUV 1,2
6:00 PMUV 0,4
7:00 PMUV 0,0
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. Catharines
Sustained wind
Max gusts
NIGHT SKY · ST. CATHARINES, ONTARIO
Tonight's Stargazing & Shooting Stars
Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.
100/100Best-hour score
BEST TIME TONIGHT
5:00 AM–6:00 AM
Astronomical darkness: 8:48 PM–5:31 AM
Cloud cover
0%
Real hourly forecast for the best viewing hour.
Moonlight
94%
Waxing Gibbous · Moon below the horizon at the best viewing hour.
Meteor activity
Southern Taurids
Reference ZHR 7 · Radiant 61° 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 min72%
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. Catharines were last refreshed today at 1:28 PM. The current forecast period extends through 25/09/2026 at 11:00 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.