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. 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) |
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").