Typical Weather

Weather in Sarnia in August

How warm is it in Sarnia in August?

In August the typical daytime high in Sarnia is 27.2 °C on average, from 28.1 °C at the start to 26.1 °C at the end of the month.

That is 1.3 °C cooler than in July and 3.5 °C warmer than in September.

Click a day for more: afternoon and night, the usual range, records and how fast it is warming.

The average of the weather stations Bowling Green Wwtp (203 km) and Toronto (255 km); nearer ones count more.