Sarnia
10 day weather forecast for Sarnia
Monday, 26th October 2026, at 17:45
Today
14° 10°
Tomorrow
15° 7°
Wednesday
19° 9°
Thursday
22° 13°
Friday
16° 10°
Saturday
16° 10°
Sunday
17° 9°
Seemore
Sarnia Weather Pages
Sarnia weather forecast
The weather forecast for Sarnia over the next 3 days indicates chilly conditions with temperatures ranging from 14 °C to 19 °C.
Light rain is expected on Thursday.
Wind speeds are expected to be strong, averaging around 23.4 km/h.
On Thursday, expect a change in weather with temperatures reaching 22°C, and light showers with a 57% chance.
Sarnia 14 days weather forecast
This weeks weather in Sarnia. Click on a date for detailed forecasts
Mon. 26
14°
10°
0 mm
Tue. 27
15°
7°
0 mm
Wed. 28
19°
9°
0 mm
Thu. 29
22°
13°
1.4 mm
Fri. 30
16°
10°
0 mm
Sat. 31
16°
10°
0 mm
Sun. 1
17°
9°
4 mm
Mon. 2
18°
12°
4.2 mm
Tue. 3
17°
11°
15.4 mm
Wed. 4
11°
7°
1.4 mm
Thu. 5
10°
7°
0 mm
Fri. 6
10°
5°
0.5 mm
Sat. 7
7°
4°
4.2 mm
Sun. 8
13°
7°
0.1 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
A total of 31.2 mm is expected over 6 rainy days. The wettest day is Tuesday 3, with 15.4 mm. Click a day for details.
Sarnia Wind Speed Forecast Chart
The windiest day is Thursday 29, with winds up to 31 km/h from the SW. The calmest day is Friday 6. The average daily maximum is 17.9 km/h.
Mon. 26
23.4 km/h
N · Moderate breeze
Tue. 27
20.9 km/h
E · Moderate breeze
Wed. 28
19.8 km/h
SE · Gentle breeze
Thu. 29
31 km/h
SW · Fresh breeze
Fri. 30
20.9 km/h
N · Moderate breeze
Sat. 31
10.4 km/h
SE · Light breeze
Sun. 1
11.9 km/h
SE · Light breeze
Mon. 2
21.6 km/h
S · Moderate breeze
Tue. 3
26.6 km/h
S · Moderate breeze
Wed. 4
17.3 km/h
SW · Gentle breeze
Thu. 5
15.1 km/h
N · Gentle breeze
Fri. 6
9.4 km/h
E · Light breeze
Sat. 7
10.8 km/h
NW · Light breeze
Sun. 8
11.9 km/h
NE · Light breeze
CalmLight breezeGentle breezeModerate breezeFresh breeze
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 4 °C on the coldest nights up to about 22 °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 6 of the next 14 days in Sarnia, with roughly 31.2 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 31 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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