Overcast night
Feels like 8°C
Wind direction east
Gusts 31 km/h
Humidity 76%
Cloud cover 100%
Pressure 1029 hPa
Now · 3:32 AM
Sarnia Weather & Hourly Forecast
Canada · Ontario
12°C
Overcast night
Feels like: 8°C
💧 Humidity 76%
🌡 Pressure 1029 hPa
💨 Wind 18 km/h
👁 Visibility 35.1 km
☁ Clouds 100%
☀️ UV index 0.0 · Low
🌅 Sunrise 7:16 AM
🌇 Sunset 7:26 PM
Hourly Forecast for Sarnia
Today
Overcast night
Mostly cloudy night
Feels like 8°C
Wind direction east
Gusts 34 km/h
Humidity 82%
Cloud cover 65%
Pressure 1030 hPa
Overcast
Feels like 11°C
Wind direction east
Gusts 36 km/h
Humidity 78%
Cloud cover 98%
Pressure 1031 hPa
Overcast
Feels like 14°C
Wind direction east
Gusts 42 km/h
Humidity 57%
Cloud cover 99%
Pressure 1031 hPa
Overcast
Feels like 14°C
Wind direction east
Gusts 36 km/h
Humidity 43%
Cloud cover 100%
Pressure 1029 hPa
Mostly cloudy
Feels like 12°C
Wind direction east
Gusts 35 km/h
Humidity 60%
Cloud cover 90%
Pressure 1029 hPa
Clear night
Feels like 9°C
Wind direction east
Gusts 34 km/h
Humidity 67%
Cloud cover 4%
Pressure 1031 hPa
Tomorrow
Clear night
Feels like 9°C
Wind direction east
Gusts 29 km/h
Humidity 76%
Cloud cover 2%
Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction east
Gusts 26 km/h
Humidity 78%
Cloud cover 0%
Pressure 1030 hPa
Clear night
Feels like 8°C
Wind direction east
Gusts 24 km/h
Humidity 84%
Cloud cover 0%
Pressure 1031 hPa
Sunny
Feels like 12°C
Wind direction east
Gusts 26 km/h
Humidity 77%
Cloud cover 0%
Pressure 1031 hPa
Sunny
Feels like 15°C
Wind direction east
Gusts 29 km/h
Humidity 56%
Cloud cover 1%
Pressure 1030 hPa
Sunny
Feels like 17°C
Wind direction east
Gusts 26 km/h
Humidity 54%
Cloud cover 2%
Pressure 1028 hPa
Sunny
Feels like 16°C
Wind direction east
Gusts 17 km/h
Humidity 61%
Cloud cover 0%
Pressure 1028 hPa
Clear night
Feels like 11°C
Wind direction east
Gusts 26 km/h
Humidity 71%
Cloud cover 9%
Pressure 1028 hPa
Friday
Mostly clear night
Feels like 9°C
Wind direction east
Gusts 17 km/h
Humidity 74%
Cloud cover 36%
Pressure 1028 hPa
Today
Overcast night
Feels like 8°C
Wind direction eastGusts 31 km/h
Humidity 76%Cloud cover 100%Pressure 1029 hPa
Overcast night
Feels like 8°C
Wind direction eastGusts 32 km/h
Humidity 78%Cloud cover 100%Pressure 1029 hPa
Overcast night
Feels like 8°C
Wind direction eastGusts 33 km/h
Humidity 80%Cloud cover 95%Pressure 1029 hPa
Mostly cloudy night
Feels like 8°C
Wind direction eastGusts 34 km/h
Humidity 82%Cloud cover 65%Pressure 1030 hPa
Overcast
Feels like 8°C
Wind direction eastGusts 36 km/h
Humidity 85%Cloud cover 97%Pressure 1031 hPa
Overcast
Feels like 9°C
Wind direction eastGusts 39 km/h
Humidity 81%Cloud cover 96%Pressure 1031 hPa
Overcast
Feels like 11°C
Wind direction eastGusts 36 km/h
Humidity 78%Cloud cover 98%Pressure 1031 hPa
Overcast
Feels like 13°C
Wind direction eastGusts 36 km/h
Humidity 73%Cloud cover 99%Pressure 1031 hPa
Overcast
Feels like 14°C
Wind direction eastGusts 36 km/h
Humidity 67%Cloud cover 100%Pressure 1031 hPa
Overcast
Feels like 14°C
Wind direction eastGusts 42 km/h
Humidity 57%Cloud cover 99%Pressure 1031 hPa
Overcast
Feels like 14°C
Wind direction eastGusts 41 km/h
Humidity 54%Cloud cover 100%Pressure 1030 hPa
Overcast
Feels like 15°C
Wind direction eastGusts 37 km/h
Humidity 52%Cloud cover 100%Pressure 1030 hPa
Overcast
Feels like 14°C
Wind direction eastGusts 36 km/h
Humidity 43%Cloud cover 100%Pressure 1029 hPa
Overcast
Feels like 15°C
Wind direction eastGusts 35 km/h
Humidity 44%Cloud cover 98%Pressure 1029 hPa
Overcast
Feels like 15°C
Wind direction eastGusts 30 km/h
Humidity 55%Cloud cover 97%Pressure 1029 hPa
Mostly cloudy
Feels like 12°C
Wind direction eastGusts 35 km/h
Humidity 60%Cloud cover 90%Pressure 1029 hPa
Partly cloudy night
Feels like 12°C
Wind direction eastGusts 36 km/h
Humidity 65%Cloud cover 55%Pressure 1030 hPa
Mostly clear night
Feels like 10°C
Wind direction eastGusts 34 km/h
Humidity 67%Cloud cover 26%Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 34 km/h
Humidity 67%Cloud cover 4%Pressure 1031 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 32 km/h
Humidity 73%Cloud cover 0%Pressure 1030 hPa
Tomorrow
Clear night
Feels like 9°C
Wind direction eastGusts 29 km/h
Humidity 76%Cloud cover 0%Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 29 km/h
Humidity 76%Cloud cover 2%Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 28 km/h
Humidity 76%Cloud cover 1%Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 27 km/h
Humidity 77%Cloud cover 1%Pressure 1030 hPa
Clear night
Feels like 9°C
Wind direction eastGusts 26 km/h
Humidity 78%Cloud cover 0%Pressure 1030 hPa
Clear night
Feels like 8°C
Wind direction eastGusts 24 km/h
Humidity 80%Cloud cover 0%Pressure 1030 hPa
Clear night
Feels like 8°C
Wind direction eastGusts 24 km/h
Humidity 81%Cloud cover 0%Pressure 1030 hPa
Clear night
Feels like 8°C
Wind direction eastGusts 24 km/h
Humidity 84%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 8°C
Wind direction eastGusts 24 km/h
Humidity 85%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 10°C
Wind direction eastGusts 25 km/h
Humidity 82%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 12°C
Wind direction eastGusts 26 km/h
Humidity 77%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 14°C
Wind direction eastGusts 27 km/h
Humidity 70%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 15°C
Wind direction eastGusts 28 km/h
Humidity 59%Cloud cover 0%Pressure 1031 hPa
Sunny
Feels like 15°C
Wind direction eastGusts 29 km/h
Humidity 56%Cloud cover 1%Pressure 1030 hPa
Sunny
Feels like 16°C
Wind direction eastGusts 29 km/h
Humidity 56%Cloud cover 6%Pressure 1029 hPa
Sunny
Feels like 17°C
Wind direction eastGusts 27 km/h
Humidity 56%Cloud cover 2%Pressure 1028 hPa
Sunny
Feels like 17°C
Wind direction eastGusts 26 km/h
Humidity 54%Cloud cover 2%Pressure 1028 hPa
Sunny
Feels like 17°C
Wind direction eastGusts 24 km/h
Humidity 51%Cloud cover 1%Pressure 1028 hPa
Sunny
Feels like 16°C
Wind direction eastGusts 21 km/h
Humidity 52%Cloud cover 0%Pressure 1028 hPa
Sunny
Feels like 16°C
Wind direction eastGusts 17 km/h
Humidity 61%Cloud cover 0%Pressure 1028 hPa
Clear night
Feels like 14°C
Wind direction eastGusts 20 km/h
Humidity 66%Cloud cover 0%Pressure 1028 hPa
Clear night
Feels like 12°C
Wind direction eastGusts 27 km/h
Humidity 66%Cloud cover 6%Pressure 1028 hPa
Clear night
Feels like 11°C
Wind direction eastGusts 26 km/h
Humidity 71%Cloud cover 9%Pressure 1028 hPa
Mostly clear night
Feels like 10°C
Wind direction eastGusts 25 km/h
Humidity 73%Cloud cover 15%Pressure 1028 hPa
Friday
Mostly clear night
Feels like 9°C
Wind direction eastGusts 21 km/h
Humidity 74%Cloud cover 25%Pressure 1028 hPa
Mostly clear night
Feels like 9°C
Wind direction eastGusts 17 km/h
Humidity 74%Cloud cover 36%Pressure 1028 hPa
Partly cloudy night
Feels like 9°C
Wind direction eastGusts 17 km/h
Humidity 76%Cloud cover 61%Pressure 1028 hPa
Partly cloudy night
Feels like 8°C
Wind direction eastGusts 15 km/h
Humidity 81%Cloud cover 56%Pressure 1028 hPa
Mostly cloudy night
Feels like 9°C
Wind direction eastGusts 16 km/h
Humidity 85%Cloud cover 80%Pressure 1028 hPa
Mostly cloudy night
Feels like 8°C
Wind direction eastGusts 16 km/h
Humidity 88%Cloud cover 94%Pressure 1028 hPa
Overcast night
Feels like 8°C
Wind direction eastGusts 19 km/h
Humidity 89%Cloud cover 97%Pressure 1028 hPa
Mostly cloudy night
Feels like 7°C
Wind direction eastGusts 22 km/h
Humidity 89%Cloud cover 90%Pressure 1028 hPa
Mostly cloudy
Feels like 8°C
Wind direction eastGusts 21 km/h
Humidity 88%Cloud cover 79%Pressure 1028 hPa
Mostly sunny
Feels like 10°C
Wind direction eastGusts 17 km/h
Humidity 84%Cloud cover 20%Pressure 1028 hPa
Sunny
Feels like 13°C
Wind direction eastGusts 17 km/h
Humidity 77%Cloud cover 12%Pressure 1029 hPa
Partly cloudy
Feels like 14°C
Wind direction northeastGusts 21 km/h
Humidity 68%Cloud cover 52%Pressure 1029 hPa
Mostly cloudy
Feels like 15°C
Wind direction northeastGusts 22 km/h
Humidity 62%Cloud cover 80%Pressure 1028 hPa
Mostly cloudy
Feels like 15°C
Wind direction northGusts 24 km/h
Humidity 58%Cloud cover 65%Pressure 1028 hPa
Partly cloudy
Feels like 15°C
Wind direction northGusts 28 km/h
Humidity 56%Cloud cover 57%Pressure 1028 hPa
Mostly cloudy
Feels like 15°C
Wind direction northGusts 29 km/h
Humidity 55%Cloud cover 66%Pressure 1027 hPa
Overcast
Feels like 15°C
Wind direction northGusts 29 km/h
Humidity 56%Cloud cover 95%Pressure 1026 hPa
Mostly cloudy
Feels like 15°C
Wind direction northGusts 29 km/h
Humidity 57%Cloud cover 89%Pressure 1026 hPa
Mostly cloudy
Feels like 15°C
Wind direction northeastGusts 28 km/h
Humidity 60%Cloud cover 80%Pressure 1025 hPa
Overcast
Feels like 15°C
Wind direction northeastGusts 24 km/h
Humidity 67%Cloud cover 99%Pressure 1025 hPa
Overcast night
Feels like 15°C
Wind direction northeastGusts 18 km/h
Humidity 70%Cloud cover 98%Pressure 1025 hPa
Clear night
Feels like 15°C
Wind direction northeastGusts 21 km/h
Humidity 77%Cloud cover 0%Pressure 1025 hPa
Saturday
Clear night
Feels like 11°C
Wind direction eastGusts 19 km/h
Humidity 89%Cloud cover 0%Pressure 1025 hPa
Clear night
Feels like 10°C
Wind direction northeastGusts 13 km/h
Humidity 90%Cloud cover 0%Pressure 1024 hPa
Sunny
Feels like 10°C
Wind direction eastGusts 12 km/h
Humidity 87%Cloud cover 0%Pressure 1024 hPa
Sunny
Feels like 16°C
Wind direction northGusts 17 km/h
Humidity 71%Cloud cover 0%Pressure 1025 hPa
Sunny
Feels like 17°C
Wind direction northGusts 27 km/h
Humidity 58%Cloud cover 0%Pressure 1023 hPa
Sunny
Feels like 17°C
Wind direction northGusts 29 km/h
Humidity 56%Cloud cover 0%Pressure 1021 hPa
Clear night
Feels like 15°C
Wind direction northGusts 26 km/h
Humidity 72%Cloud cover 0%Pressure 1020 hPa
Clear night
Feels like 16°C
Wind direction northeastGusts 14 km/h
Humidity 80%Cloud cover 0%Pressure 1020 hPa
Sunday
Clear night
Feels like 13°C
Wind direction northeastGusts 17 km/h
Humidity 87%Cloud cover 0%Pressure 1019 hPa
Clear night
Feels like 12°C
Wind direction northeastGusts 11 km/h
Humidity 87%Cloud cover 0%Pressure 1018 hPa
Sunny
Feels like 14°C
Wind direction northGusts 13 km/h
Humidity 93%Cloud cover 0%Pressure 1018 hPa
Mostly sunny
Feels like 16°C
Wind direction northGusts 32 km/h
Humidity 67%Cloud cover 20%Pressure 1017 hPa
Sunny
Feels like 16°C
Wind direction northGusts 35 km/h
Humidity 59%Cloud cover 6%Pressure 1015 hPa
Sunny
Feels like 16°C
Wind direction northGusts 36 km/h
Humidity 65%Cloud cover 0%Pressure 1014 hPa
Clear night
Feels like 15°C
Wind direction northGusts 35 km/h
Humidity 72%Cloud cover 0%Pressure 1014 hPa
Clear night
Feels like 15°C
Wind direction northGusts 27 km/h
Humidity 75%Cloud cover 0%Pressure 1013 hPa
Monday
Clear night
Feels like 14°C
Wind direction northGusts 20 km/h
Humidity 84%Cloud cover 0%Pressure 1013 hPa
Clear night
Feels like 13°C
Wind direction northwestGusts 19 km/h
Humidity 89%Cloud cover 0%Pressure 1013 hPa
Sunny
Feels like 13°C
Wind direction northwestGusts 19 km/h
Humidity 90%Cloud cover 0%Pressure 1013 hPa
Sunny
Feels like 17°C
Wind direction northwestGusts 22 km/h
Humidity 74%Cloud cover 7%Pressure 1014 hPa
Sunny
Feels like 18°C
Wind direction northGusts 22 km/h
Humidity 56%Cloud cover 0%Pressure 1013 hPa
Clear night
Feels like 18°C
Wind direction northGusts —
Humidity 66%Cloud cover 1%Pressure 1014 hPa
Tuesday
Clear night
Feels like 17°C
Wind direction northGusts —
Humidity 83%Cloud cover 0%Pressure 1013 hPa
Mostly sunny
Feels like 14°C
Wind direction southGusts —
Humidity 95%Cloud cover 30%Pressure 1014 hPa
Overcast
Feels like 13°C
Wind direction southwestGusts —
Humidity 96%Cloud cover 100%Pressure 1015 hPa
Clear night
Feels like 22°C
Wind direction southwestGusts —
Humidity 58%Cloud cover 2%Pressure 1014 hPa
Wednesday
Clear night
Feels like 18°C
Wind direction southGusts —
Humidity 71%Cloud cover 0%Pressure 1013 hPa
Overcast
Feels like 13°C
Wind direction southeastGusts —
Humidity 82%Cloud cover 99%Pressure 1014 hPa
Partly cloudy
Feels like 13°C
Wind direction southeastGusts —
Humidity 85%Cloud cover 75%Pressure 1014 hPa
Mostly clear night
Feels like 21°C
Wind direction southeastGusts —
Humidity 52%Cloud cover 38%Pressure 1011 hPa
Thursday
Overcast night
Feels like 19°C
Wind direction southeastGusts —
Humidity 76%Cloud cover 99%Pressure 1010 hPa
Overcast
Feels like 20°C
Wind direction southGusts —
Humidity 77%Cloud cover 100%Pressure 1011 hPa
Overcast
Feels like 18°C
Wind direction southeastGusts —
Humidity 83%Cloud cover 100%Pressure 1012 hPa
Overcast night
Feels like 23°C
Wind direction southGusts —
Humidity 68%Cloud cover 98%Pressure 1012 hPa
Friday
Overcast night
Feels like 21°C
Wind direction southeastGusts —
Humidity 73%Cloud cover 98%Pressure 1012 hPa
Overcast
Feels like 21°C
Wind direction southGusts —
Humidity 74%Cloud cover 99%Pressure 1011 hPa
Overcast
Feels like 17°C
Wind direction southGusts —
Humidity 94%Cloud cover 97%Pressure 1011 hPa
Light rain
Feels like 19°C
Wind direction southwestGusts —
Humidity 80%Cloud cover 100%Pressure 1009 hPa
Saturday
Mostly clear night
Feels like 21°C
Wind direction southGusts —
Humidity 84%Cloud cover 28%Pressure 1009 hPa
Sunny
Feels like 19°C
Wind direction southwestGusts —
Humidity 96%Cloud cover 1%Pressure 1010 hPa
Partly cloudy
Feels like 17°C
Wind direction southeastGusts —
Humidity 96%Cloud cover 73%Pressure 1008 hPa
Light rain
Feels like 17°C
Wind direction southGusts —
Humidity 91%Cloud cover 100%Pressure 1007 hPa
Sunday
Clear night
Feels like 16°C
Wind direction southwestGusts —
Humidity 78%Cloud cover 2%Pressure 1004 hPa
Overcast
Feels like 14°C
Wind direction southwestGusts —
Humidity 91%Cloud cover 100%Pressure 1003 hPa
Sunny
Feels like 11°C
Wind direction southwestGusts —
Humidity 91%Cloud cover 4%Pressure 1004 hPa
Partly cloudy night
Feels like 15°C
Wind direction southwestGusts —
Humidity 56%Cloud cover 47%Pressure 1005 hPa
Monday
Mostly clear night
Feels like 13°C
Wind direction westGusts —
Humidity 73%Cloud cover 16%Pressure 1007 hPa
Mostly sunny
Feels like 10°C
Wind direction westGusts —
Humidity 87%Cloud cover 27%Pressure 1008 hPa
Overcast
Feels like 9°C
Wind direction westGusts —
Humidity 87%Cloud cover 96%Pressure 1010 hPa
Overcast night
Feels like 8°C
Wind direction westGusts —
Humidity 60%Cloud cover 100%Pressure 1009 hPa
Tuesday
Overcast night
Feels like 8°C
Wind direction westGusts —
Humidity 68%Cloud cover 100%Pressure 1010 hPa
Overcast
Feels like 7°C
Wind direction westGusts —
Humidity 80%Cloud cover 100%Pressure 1010 hPa
Partly cloudy
Feels like 8°C
Wind direction northwestGusts —
Humidity 86%Cloud cover 45%Pressure 1012 hPa
Overcast night
Feels like 10°C
Wind direction northwestGusts —
Humidity 72%Cloud cover 100%Pressure 1013 hPa
Wednesday
Partly cloudy night
Feels like 9°C
Wind direction northwestGusts —
Humidity 79%Cloud cover 61%Pressure 1015 hPa
Overcast
Feels like 9°C
Wind direction northwestGusts —
Humidity 83%Cloud cover 100%Pressure 1016 hPa
Light rain
Feels like 10°C
Wind direction northGusts —
Humidity 92%Cloud cover 99%Pressure 1017 hPa
In Sarnia 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 Sarnia
TomorrowTomorrow
Mostly cloudy
19°/11°
💧 None
💨 17 km/h
Mostly cloudy
19°/11°
💧 None
💨 17 km/h
Daytime temperature 17°C
Feels like 14°C
Humidity 70%
Pressure 1030 hPa
Cloud cover 13%
Wind direction east
Gusts 29 km/h
Sunrise —
Sunset —
Friday, Sep 25Fri Sep 25
Mostly sunny
18°/9°
💧 None
💨 16 km/h
Mostly sunny
18°/9°
💧 None
💨 16 km/h
Daytime temperature 10°C
Feels like 8°C
Humidity 78%
Pressure 1027 hPa
Cloud cover 15%
Wind direction east
Gusts 30 km/h
Sunrise —
Sunset —
Saturday, Sep 26Sat Sep 26
Sunny
19°/11°
💧 None
💨 14 km/h
Sunny
19°/11°
💧 None
💨 14 km/h
Daytime temperature 17°C
Feels like 16°C
Humidity 75%
Pressure 1023 hPa
Cloud cover 0%
Wind direction north
Gusts 29 km/h
Sunrise —
Sunset —
Sunday, Sep 27Sun Sep 27
Mostly sunny
20°/13°
💧 None
💨 20 km/h
Mostly sunny
20°/13°
💧 None
💨 20 km/h
Daytime temperature 19°C
Feels like 16°C
Humidity 76%
Pressure 1016 hPa
Cloud cover 3%
Wind direction north
Gusts 36 km/h
Sunrise —
Sunset —
Monday, Sep 28Mon Sep 28
Sunny
20°/14°
💧 None
💨 16 km/h
Sunny
20°/14°
💧 None
💨 16 km/h
Daytime temperature 18°C
Feels like 17°C
Humidity 76%
Pressure 1013 hPa
Cloud cover 1%
Wind direction northwest
Gusts 22 km/h
Sunrise —
Sunset —
Tuesday, Sep 29Tue Sep 29
Overcast
22°/13°
💧 None
💨 9 km/h
Overcast
22°/13°
💧 None
💨 9 km/h
Daytime temperature 13°C
Feels like 13°C
Humidity 83%
Pressure 1014 hPa
Cloud cover 33%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Wednesday, Sep 30Wed Sep 30
Overcast
24°/14°
💧 None
💨 18 km/h
Overcast
24°/14°
💧 None
💨 18 km/h
Daytime temperature 15°C
Feels like 13°C
Humidity 72%
Pressure 1013 hPa
Cloud cover 53%
Wind direction southeast
Gusts —
Sunrise —
Sunset —
Thursday, Oct 1Thu Oct 1
Overcast
23°/18°
💧 None
💨 17 km/h
Overcast
23°/18°
💧 None
💨 17 km/h
Daytime temperature 18°C
Feels like 18°C
Humidity 76%
Pressure 1011 hPa
Cloud cover 99%
Wind direction southeast
Gusts —
Sunrise —
Sunset —
Friday, Oct 2Fri Oct 2
Light rain
23°/19°
💧 5.2 mm
💨 28 km/h
Light rain
23°/19°
💧 5.2 mm
💨 28 km/h
Daytime temperature 19°C
Feels like 17°C
Humidity 80%
Pressure 1011 hPa
Cloud cover 98%
Wind direction south
Gusts —
Sunrise —
Sunset —
Saturday, Oct 3Sat Oct 3
Light rain
21°/18°
💧 4.7 mm
💨 26 km/h
Light rain
21°/18°
💧 4.7 mm
💨 26 km/h
Daytime temperature 18°C
Feels like 17°C
Humidity 92%
Pressure 1008 hPa
Cloud cover 50%
Wind direction southeast
Gusts —
Sunrise —
Sunset —
Sunday, Oct 4Sun Oct 4
Partly cloudy
19°/14°
💧 1.3 mm
💨 21 km/h
Partly cloudy
19°/14°
💧 1.3 mm
💨 21 km/h
Daytime temperature 14°C
Feels like 11°C
Humidity 79%
Pressure 1004 hPa
Cloud cover 38%
Wind direction southwest
Gusts —
Sunrise —
Sunset —
Monday, Oct 5Mon Oct 5
Overcast
16°/12°
💧 0.7 mm
💨 25 km/h
Overcast
16°/12°
💧 0.7 mm
💨 25 km/h
Daytime temperature 12°C
Feels like 9°C
Humidity 77%
Pressure 1008 hPa
Cloud cover 60%
Wind direction west
Gusts —
Sunrise —
Sunset —
Tuesday, Oct 6Tue Oct 6
Overcast
14°/12°
💧 0.2 mm
💨 25 km/h
Overcast
14°/12°
💧 0.2 mm
💨 25 km/h
Daytime temperature 12°C
Feels like 8°C
Humidity 76%
Pressure 1011 hPa
Cloud cover 86%
Wind direction northwest
Gusts —
Sunrise —
Sunset —
Wednesday, Oct 7Wed Oct 7
Light rain
13°/13°
💧 2.1 mm
💨 20 km/h
Light rain
13°/13°
💧 2.1 mm
💨 20 km/h
Daytime temperature 13°C
Feels like 10°C
Humidity 85%
Pressure 1016 hPa
Cloud cover 87%
Wind direction north
Gusts —
Sunrise —
Sunset —
TEMPERATURE OUTLOOK
Temperature & Weather Trends in Sarnia
AIR QUALITY FORECAST
Air Quality Forecast for Sarnia
Fair
Nearest forecast value
4:00 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 2,4µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 70,3µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 4,9µg/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 2,6µg/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 3,0µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 77,0µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 4,8µg/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 3,8µg/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 89,0µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 5,6µg/m³
A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.
Air quality is acceptable for most people.
Fair
Selected time
12:00 AM
PM2.5 Fine particles Good 6,3µg/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 7,8µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 85,7µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 11,7µg/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 2,8µg/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 4,2µg/m³
Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.
O₃ Ozone Fair 74,1µg/m³
Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.
NO₂ Nitrogen dioxide Good 10,5µg/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 Sarnia
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 5,0Moderate
🙂Fair
Friday
UV 4,9Moderate
😐Moderate
Saturday
UV 4,9Moderate
😐Moderate
Sunday
UV 5,0Moderate
🙂Fair
Monday
UV 6,0High
—Unavailable
Tuesday
UV 6,0High
—Unavailable
Hourly UV index today
7:00 AMUV 0,0
8:00 AMUV 0,0
9:00 AMUV 0,5
10:00 AMUV 1,5
11:00 AMUV 2,8
12:00 PMUV 4,3
1:00 PMUV 5,1
2:00 PMUV 5,0
3:00 PMUV 4,3
4:00 PMUV 3,0
5:00 PMUV 1,5
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 Sarnia
Sustained wind
Max gusts
NIGHT SKY · SARNIA, ONTARIO
Tonight's Stargazing & Shooting Stars
Local night-sky conditions and meteor activity for Jasper.
32/100Best-hour score
No good viewing window tonight
Astronomical darkness exists, but current sky conditions are unfavorable.
Cloud cover
95%
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 58° high at the best hour.
Estimated visible meteors
Poor visibility
Meteor activity may occur above the clouds, but local viewing conditions are not suitable.
Chance ≥1 meteor in 30 minNot meaningful
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 Sarnia were last refreshed today at 3:32 AM. The current forecast period extends through 25/09/2026 at 1:00 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.