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Sudbury (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sudbury.
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Climate overview of Sudbury
The climate in Sudbury, Ontario, Canada, is marked by large temperature swings across the seasons, ranging from 26°C (79°F) in July to -6°C (21°F) in January.
The city receives around 929 mm (37 in) of rain/snowfall per year. It experiences warm summers and very cold winters. October is the wettest month and February the driest.
Sudbury Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sudbury - and find the best time to visit.
Monthly Temperature in Sudbury
In Sudbury, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 26°C (79°F) in July to a very cold -6°C (21°F) in January.
Nighttime temperatures range from 13°C (55°F) in July to -17°C (1°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Sudbury
On average, Sudbury receives a reasonable amount of rain/snowfall, with an annual precipitation of 929 mm (37 in). The amount of precipitation varies moderately throughout the year. The wettest month, October, sees around 98 mm (3.9 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 51 mm (2 in) of snowfall. For more details, please visit our Sudbury Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Sudbury
The most comfortable overall weather for exploring Sudbury is usually found in June, July, August and September. Conditions are generally least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
mixed
May
very good
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
mixed
Nov
cold
Dec
very cold
- Best overall: June, July, August and September
- Warmest weather: July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -17°C (1°F).
Frequently asked questions about the climate in Sudbury
What is the best time to visit Sudbury?
June, July, August and September typically offer the most optimal weather in Sudbury. In contrast, January, February, March, November and December tend to have less optimal conditions. Sudbury has warm summers and very cold winters.
What temperatures can I expect in Sudbury?
Daytime highs range from -6°C (21°F) in January to 26°C (79°F) in July. Nighttime lows range from -17°C (1°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Sudbury get?
Annual rainfall is around 929 mm (37 in). October is the wettest month with 98 mm (3.9 in), while February is the driest with 51 mm (2 in).
Sudbury 3-Day Forecast
Sudbury on the map
Sudbury is highlighted - select any city to see its climate.
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