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Weather & Climate in Greater Sudbury / Grand Sudbury, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Greater Sudbury / Grand Sudbury has a cool climate with an average annual temperature of 40°F (4°C). Winters average 9°F in January while summers reach 67°F in July. The area gets 276 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 33.0 inches. The area receives 11.3 inches of snow annually. The city sits at an elevation of 873 feet.
Temperature
9°F Jan (-13°C)
67°F Jul (20°C)
| Annual Average | 39.7°F |
| 26% below US avg | |
| January Average | 9°F (-13°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 873 ft (266 m) |
| Area | 1,230.2 sq mi (3,186.3 km²) |
| Population Density | 135/sq mi |
| Coordinates | 46.4900°N, 80.9900°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
6 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Mar 9, 1998 | Ontario, Canada | M3.9 | 6 km | 1 km |
| Aug 5, 2014 | 6 km NNW of Lively, Canada | M3.8 | 16 km | 5 km |
| Mar 13, 2005 | 5 km N of Greater Sudbury, Canada | M3.6 | 6 km | 18 km |
| May 25, 1998 | 3 km NW of Lively, Canada | M3.4 | 15 km | 1 km |
| Aug 5, 2014 | 5 km NNW of Lively, Canada | M3.3 | 15 km | 12 km |
| Feb 8, 2019 | 7 km SW of Azilda, Canada | M3.1 | 14 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 9°F (-13°C) | 2.2 in | Coldest |
| February | 12°F (-11°C) | 1.8 in | Driest |
| March | 23°F (-5°C) | 2.0 in | |
| April | 38°F (3°C) | 2.2 in | |
| May | 52°F (11°C) | 3.2 in | |
| June | 62°F (17°C) | 3.0 in | |
| July | 67°F (20°C) | 2.8 in | Warmest |
| August | 65°F (18°C) | 3.2 in | |
| September | 56°F (13°C) | 3.9 in | Wettest |
| October | 44°F (7°C) | 3.4 in | |
| November | 32°F (-0°C) | 2.9 in | |
| December | 17°F (-8°C) | 2.4 in |
Greater Sudbury / Grand Sudbury has a seasonal temperature swing of 58°F / from 9°F in January to 67°F in July. Total annual precipitation is 32.9 inches, with September being the wettest month (3.9") and February the driest (1.8").