Weatheo

Sudbury weather by month

Warmest month

July

26°C average high

Coolest month

January

-15°C average low

Wettest month

May

45 mm of rain

Driest month

February

7 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.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January-6°C-15°C-30°C / 5°C
7 mm
83%12 km/h
February-4°C-15°C-33°C / 7°C
7 mm
78%15 km/h
March1°C-10°C-26°C / 13°C
15 mm
73%14 km/h
April8°C-2°C-20°C / 27°C
43 mm
70%14 km/h
May18°C6°C-4°C / 27°C
45 mm
67%13 km/h
June22°C11°C2°C / 29°C
36 mm
70%12 km/h
July26°C14°C7°C / 32°C
37 mm
72%11 km/h
August24°C13°C4°C / 32°C
37 mm
75%11 km/h
September21°C9°C2°C / 30°C
36 mm
81%11 km/h
October12°C4°C-6°C / 28°C
45 mm
82%13 km/h
November6°C-1°C-16°C / 19°C
29 mm
86%14 km/h
December-1°C-9°C-24°C / 11°C
7 mm
84%14 km/h

Frost and snow-likely months in Sudbury

Nights in Sudbury average 2°C or below in 6 months (January, February, March, April, November and December). March, April and November combine average lows at or below 0°C with 10 mm or more of monthly precipitation, so precipitation then is likely to fall as snow. The coldest month is January with an average low of -15°C and a record low of -30°C.

  • January: average low -15°C, record low -30°C, 7 mm of precipitation
  • February: average low -15°C, record low -33°C, 7 mm of precipitation
  • March: average low -10°C, record low -26°C, 15 mm of precipitation — snow-likely
  • April: average low -2°C, record low -20°C, 43 mm of precipitation — snow-likely
  • November: average low -1°C, record low -16°C, 29 mm of precipitation — snow-likely
  • December: average low -9°C, record low -24°C, 7 mm of precipitation

These records carry temperature and precipitation, not snowfall totals.

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 344 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 45 mm, roughly 7× the rainfall of the driest month (February).

Sudbury climate: your questions

Does it snow in Sudbury?

Yes, in winter: March, April and November average lows at or below 0°C with 10 mm or more of monthly precipitation, so some of it falls as snow. The coldest month is January (average low -15°C, record low -30°C). Our records carry temperature and precipitation, not snowfall totals. What is falling now: Sudbury weather today.

Will Sudbury get snow this winter?

Sudbury's winter months average lows of -9°C in December, -15°C in January and -15°C in February, with about 22 mm of precipitation across the three; 3 of them sit at or below 0°C, so snow is likely on the colder days. The records hold no snowfall totals. The next 15 days: Sudbury 10-day forecast.

Which months are best for visiting Sudbury?

June to August are the most comfortable months in Sudbury, with highs near 24°C. July is the warmest month, averaging 26°C by day; May is the wettest, with 45 mm; and January is the coolest, with lows near -15°C. What it is doing today: Sudbury weather today.

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

Nearest cities: Monthly climate

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