Sarnia
10 day weather forecast for Sarnia
Monday, 20th July 2026, at 10:26
today
30° 12°
tomorrow
27° 17°
Wednesday
22° 14°
Thursday
24° 13°
Friday
27° 16°
Saturday
29° 19°
Sunday
30° 18°
Seemore
Sarnia Weather Pages
Sarnia weather forecast
The weather forecast for Sarnia over the next 2 days indicates very wet conditions with temperatures ranging from 27 °C to 30 °C.
Rain is expected from Tuesday until Wednesday.
Wind speeds are expected to be strong, averaging around 25 km/h.
On Wednesday, expect a change in weather with temperatures reaching 22°C, and light showers with a 17% chance.
Sarnia 14 days weather forecast
This weeks weather in Sarnia. Click on a date for detailed forecasts
Mon. 20
30°
12°
0 mm
Tue. 21
27°
17°
12.7 mm
Wed. 22
22°
14°
0.2 mm
Thu. 23
24°
13°
0 mm
Fri. 24
27°
16°
0 mm
Sat. 25
29°
19°
0 mm
Sun. 26
30°
18°
0 mm
Mon. 27
29°
20°
4.9 mm
Tue. 28
22°
17°
0.9 mm
Wed. 29
23°
15°
0 mm
Thu. 30
25°
15°
0 mm
Fri. 31
30°
16°
0 mm
Sat. 1
31°
20°
1 mm
Sun. 2
33°
21°
0 mm
Further Ahead
You can click on date
Access Sarnia weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Sarnia long range weather forecast
30 day weather forecast for Sarnia
Important Notice
Our Sarnia long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.
Rain Forecast for the Next 14 Days in Sarnia
The chart displays the expected rainfall values (in mm) over the next 14 days in Sarnia, highlighting variations in precipitation levels for specific dates. ☔
Sarnia Wind Speed Forecast Chart
This chart illustrates the projected daily max wind speed (in km) in Sarnia over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀
Frequently asked questions about the weather in Sarnia
How warm is it in Sarnia over the next 14 days?
Over the next two weeks, temperatures in Sarnia are expected to range from around 12 °C on the coldest nights up to about 33 °C on the warmest days. Use this range to plan what to pack and wear.
Will it rain in Sarnia in the next two weeks?
Yes - rain is expected on about 5 of the next 14 days in Sarnia, with roughly 19.7 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.
How windy is it in Sarnia?
Maximum wind speeds in Sarnia are forecast to reach about 34 km/h at their peak over the next 14 days.
When is the best time to visit Sarnia?
For a month-by-month look at temperatures and rainfall, see our best time to visit Sarnia guide.
How accurate is the 14-day forecast for Sarnia?
Our Sarnia forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.
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Where is Sarnia?Get accurate weather forecasts for Sarnia, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Sarnia.
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