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Weather by month

Sudbury Weather by Month

Average temperatures, rainfall and humidity for Sudbury, Canada, month by month, built from OpenWeather’s historical records. Use it to see what a typical Sudbury month looks like before you travel — then check the live Sudbury forecast for the days ahead.

Warmest month

July

26°C average high

Coolest month

February

-16°C average low

Wettest month

May

46 mm of rain

Driest month

February

5 mm of rain

Average temperature and rainfall in Sudbury by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	-5°C	-15°C	-37°C / 8°C	5 mm	82%	13 km/h
February	-5°C	-16°C	-36°C / 10°C	5 mm	78%	14 km/h
March	1°C	-9°C	-32°C / 15°C	16 mm	74%	14 km/h
April	8°C	-2°C	-20°C / 27°C	46 mm	70%	15 km/h
May	18°C	6°C	-5°C / 31°C	46 mm	65%	13 km/h
June	23°C	11°C	2°C / 32°C	40 mm	69%	12 km/h
July	26°C	14°C	6°C / 34°C	35 mm	72%	11 km/h
August	24°C	14°C	4°C / 32°C	39 mm	77%	10 km/h
September	20°C	10°C	-1°C / 31°C	35 mm	80%	12 km/h
October	12°C	4°C	-10°C / 28°C	45 mm	81%	13 km/h
November	4°C	-4°C	-23°C / 20°C	31 mm	83%	14 km/h
December	-2°C	-10°C	-32°C / 14°C	11 mm	84%	14 km/h

Best time to visit Sudbury

The most comfortable time to visit Sudbury is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 353 mm a year.

Travellers who prefer heat should aim for July, when highs average 26°C. May is the month to avoid if rain would spoil your plans — it averages 46 mm, roughly 10× the rainfall of the driest month (February).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Sudbury forecast for what is happening now.