For Wednesday the predicted weather in Sarnia is rain during the afternoon and evening. The maximum temperature is a pleasant 20°C (68°F), while the minimum temperature is a mild 16°C (61°F).

Tomorrow's weather - Thursday 1 Oct

Tomorrow's weather in Sarnia will be heavy rain throughout the day. Temperatures will range from a mild 17°C (63°F) to a pleasant 20°C (68°F).

10-Day Weather Forecast

Over the next 10 days, temperatures in Sarnia will be will get cooler from 20°C (68°F) down to 15°C (59°F), with average daytime highs of 16°C (61°F) and nighttime lows of 11°C (52°F) over this period. Compared to typical September conditions, these temperatures are much cooler than usual. There will be plenty of sunshine throughout this time. Rain amounts are forecast to be more than usual (relative to standard September patterns), with mixed conditions, with some heavy rain showers especially on Wed, Thu, Fri. Precipitation is likely on approximately 3 days (Wed, Thu, Fri).

Weather Forecast FAQ for Sarnia

When will be the warmest day next week?

The warmest day is expected to be Wednesday with a high of 20°C (68°F).

When will be the coldest day?

The coldest day is forecasted for Tuesday with a low of 6°C (43°F).

Will it rain next week in Sarnia?

Yes, rain is expected on 3 days , specifically on Wed, Thu, Fri.

How much rainfall is expected next week?

A total of 36 mm (1.4 in) of rain is forecasted for the 10-day period.

What will be the temperature range next week?

Temperatures will range from 6°C (43°F) to 20°C (68°F).

More about Sarnia

Explore the full Sarnia climate overview with monthly averages, or check rainfall data and temperature by month.

Sarnia weather by month

Browse monthly averages for Sarnia: climate by month with temperature, rainfall and sunshine.

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