Sarnia Weather Forecast

CURRENT CONDITIONS - July 1, 2026
26°
Low of26°
Feels like 26°CLast Updated: July 1, 2026 at 9:20 AMWeather information supplied by: OpenWeather API
POP:0.48%
Wind:5.68 km/h
Humidity:68%
UV:9.56
Sunrise:9:53 AM
Sunset:1:12 AM

Current Weather Alerts

A long duration heat event continues. For some areas, this is the first heat event of the season. What: Maximum temperatures of 31 to 35 degrees Celsius, and potentially up to 37 degrees Celsius for some areas. Minimum temperatures of 21 to 25 degrees Celsius. When: Continuing through Friday, and possibly into the weekend. Additional Information: The hottest days are expected today through Thursday, with maximum temperatures of 35 to 37 degrees Celsius expected. Minimum temperatures of 21 to 25 degrees Celsius will provide little relief from the heat. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category. ### For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #ONStorm.

Sarnia Weather Forecast - Hourly

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8 AM

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Sarnia Weather Forecast - Weekly

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Today
July 1
33°
26°
Tomorrow
July 2
33°
24°
Friday
July 3
31°
22°
Saturday
July 4
22°
19°
Sunday
July 5
22°
19°
Monday
July 6
22°
19°
Tuesday
July 7
26°
21°
Wednesday
July 8
25°
19°

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