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Monthly climate in Greater Sudbury, Ontario, Canada

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Greater Sudbury features a humid continental climate (Dfb). Temperatures typically range between -11 °C (13 °F) and 20 °C (68 °F) through the year, but rarely can drop to -37 °C (-34 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 966 mm (38.0 inches) and receives 130 rainy days on the 1 mm (0.04 inches) threshold annually. Greater Sudbury enjoys an average of 2705 hours of sunshine throughout the year, and daylight varies from 8 hours 37 minutes to 15 hours 44 minutes per day.

Monthly average temperatures in Greater Sudbury, Ontario, Canada §

The warmest months in Greater Sudbury are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (62 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -11 to -8 °C (13 - 18 °F) throughout the day. On average each year, Greater Sudbury experiences 44 days above 25 °C (77.0 °F) and 164 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Greater Sudbury, Ontario, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 7°C
(44°F)		 10°C
(50°F)		 15°C
(60°F)		 26°C
(78°F)		 32°C
(89°F)		 32°C
(90°F)		 34°C
(94°F)		 32°C
(90°F)		 31°C
(88°F)		 24°C
(75°F)		 20°C
(69°F)		 10°C
(51°F)
Mean maximum 3°C
(38°F)		 6°C
(42°F)		 12°C
(53°F)		 20°C
(69°F)		 28°C
(83°F)		 30°C
(86°F)		 32°C
(90°F)		 30°C
(86°F)		 27°C
(80°F)		 21°C
(71°F)		 11°C
(53°F)		 6°C
(44°F)
Average high -6°C
(21°F)		 -5°C
(24°F)		 1°C
(34°F)		 9°C
(48°F)		 17°C
(64°F)		 23°C
(73°F)		 26°C
(79°F)		 24°C
(76°F)		 19°C
(67°F)		 12°C
(53°F)		 2°C
(36°F)		 -4°C
(25°F)
Daily mean -11°C
(13°F)		 -10°C
(14°F)		 -5°C
(24°F)		 3°C
(38°F)		 11°C
(53°F)		 17°C
(62°F)		 20°C
(68°F)		 18°C
(65°F)		 14°C
(57°F)		 7°C
(45°F)		 -2°C
(29°F)		 -8°C
(18°F)
Average low -16°C
(4°F)		 -16°C
(4°F)		 -10°C
(14°F)		 -2°C
(28°F)		 5°C
(42°F)		 11°C
(52°F)		 14°C
(58°F)		 13°C
(56°F)		 9°C
(48°F)		 3°C
(38°F)		 -6°C
(22°F)		 -12°C
(10°F)
Mean minimum -30°C
(-22°F)		 -29°C
(-21°F)		 -24°C
(-10°F)		 -13°C
(10°F)		 -3°C
(27°F)		 5°C
(42°F)		 9°C
(49°F)		 7°C
(45°F)		 2°C
(36°F)		 -5°C
(24°F)		 -19°C
(-3°F)		 -28°C
(-18°F)
Minimum -37°C
(-34°F)		 -34°C
(-28°F)		 -27°C
(-16°F)		 -24°C
(-12°F)		 -7°C
(20°F)		 2°C
(37°F)		 8°C
(46°F)		 5°C
(41°F)		 0°C
(32°F)		 -9°C
(15°F)		 -26°C
(-15°F)		 -33°C
(-27°F)

Compare climate in Greater Sudbury with other places

Compare temperature, precipitation, sunshine, UV index in Greater Sudbury, Ontario, Canada with other places around the world.

Monthly average precipitation in Greater Sudbury, Ontario, Canada §

Greater Sudbury usually has the most precipitation in June, August and October, with an average of 11 rainy days and 105 mm (4.1 inches) of precipitation per month. The driest months in Greater Sudbury are January, February and March. On average, 52 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Greater Sudbury, Ontario, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 45 (1.8) 60 (2.4) 51 (2.0) 83 (3.3) 82 (3.2) 96 (3.8) 94 (3.7) 96 (3.8) 90 (3.6) 124 (4.9) 81 (3.2) 65 (2.5)
Average precipitation days (≥ 1 mm) 8 11 8 12 11 11 10 11 10 13 12 13

Monthly sunshine hours in Greater Sudbury, Ontario, Canada §

The sunniest months in Greater Sudbury are June, July and August, when the sun shines an average of 10 hours 31 minutes a day. Least sunny months in Greater Sudbury: January, November and December receive an average of 4 hours 0 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Greater Sudbury, Ontario, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 106 163 243 236 286 315 345 307 253 186 138 123
Mean daily daylight hours 9h 2m 10h 20m 11h 57m 13h 36m 15h 1m 15h 44m 15h 21m 14h 4m 12h 29m 10h 50m 9h 22m 8h 37m

Solar UV radiation in Greater Sudbury, Ontario, Canada §

Greater Sudbury experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Greater Sudbury UV Index data.

Average daily maximum UV levels by month for Greater Sudbury, Ontario, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 7 9 9 9 8 7 5 3 2

Detailed Monthly Weather Insights for Greater Sudbury, Ontario, Canada

Discover in-depth weather details for every month in Greater Sudbury. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Greater Sudbury's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.