Weather in Sarnia, Canada 🇨🇦
The current temperature in Sarnia is 30°C, sunny, feeling like 29°C. Expect 37% humidity and winds of about 13 km/h, and the UV index is 7 (high). In the days ahead, expect temperatures in Sarnia from about 15°C to 32°C.
Hourly Forecast for Sarnia
14-Day Forecast for Sarnia
Sunny
Patchy rain nearby
Sunny
Sunny
Sunny
Sunny
Partly Cloudy
Patchy rain nearby
Partly Cloudy
Sunny
Patchy rain nearby
Sunny
Sunny
Patchy rain nearby
Additional Forecasts for Sarnia
Air Quality
Historical Weather
Weather Forecasts for Other Cities in Canada
Best Time to Be Outside in Sarnia Today
The most comfortable window in Sarnia today looks like 18:00 to 21:00, when it is around 27°C. It should stay dry through that window. The next likely rain is around 23:00.
Frequently Asked Questions about Weather in Sarnia
What is the temperature in Sarnia right now?
The current temperature in Sarnia is 30°C (87°F), sunny (feels like 29°C).
What's the weather like in Sarnia right now?
Conditions in Sarnia right now: Sunny, humidity 37%, wind 13 km/h SSW.
What is today's forecast for Sarnia?
Today in Sarnia: high 32°C, low 15°C, sunny. Chance of rain: 57%.
What is the 7-day weather forecast for Sarnia?
Daily highs and lows for Sarnia:
- 2026-08-09: 32°C / 15°C
- 2026-08-10: 28°C / 20°C
- 2026-08-11: 27°C / 18°C
- 2026-08-12: 28°C / 18°C
- 2026-08-13: 23°C / 16°C
- 2026-08-14: 22°C / 14°C
- 2026-08-15: 23°C / 14°C
Is it going to rain in Sarnia today?
There is a 57% chance of rain in Sarnia today. Total expected precipitation: 3.47 mm.
What is the wind speed in Sarnia right now?
Wind in Sarnia is currently 13 km/h (8 mph) from the SSW.
What is the UV index in Sarnia right now?
The UV index in Sarnia is currently 6.8 (high). Sun protection is recommended when the index is 3 or higher.
