With a population of around 72,100, Sarnia sits in Ontario, Canada. The city operates in the Eastern Time Zone.
Expect a humid continental climate in Sarnia: average highs of 82°F in midsummer, lows near 18°F in midwinter, and an annual mean of 49°F. Precipitation totals roughly 35 inches per year and 32 inches of snow, concentrated around July, with February typically the driest month.