Tuesday
Sunny
High:
29°C
Sunny. High 29.
Sarnia, Ontario Weather - Extended Forecast
Tuesday Night
Cloudy periods
Overnight low:
18°C
Cloudy periods. Low 18.
Wednesday
Chance of showers
High:
28°C
Wednesday Night
Chance of showers
Overnight low:
16°C
Thursday
Chance of showers
High:
20°C
Thursday Night
Chance of showers
Overnight low:
14°C
Friday
Chance of showers
High:
21°C