Weather & Climate in West Grey, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
West Grey has a cool climate with an average annual temperature of 43°F (6°C). Winters average 18°F in January while summers reach 67°F in July. Annual precipitation totals 42.2 inches. The area receives 13.7 inches of snow annually. The city sits at an elevation of 1,030 feet.
Temperature
18°F Jan (-8°C)
67°F Jul (19°C)
| Annual Average | 43.2°F |
| 20% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 67°F (19°C) |
Geography
| Elevation | 1,030 ft (314 m) |
| Area | 337.9 sq mi (875.2 km²) |
| Population Density | 39/sq mi |
| Coordinates | 44.1554°N, 80.8836°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.1.
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 148 km | 18 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 144 km | 4 km |
| Jul 29, 2012 | 17 km SSW of Parry Sound, Canada | M2.5 | 131 km | 5 km |
| May 17, 2010 | 19 km WNW of Gravenhurst, Canada | M2.5 | 141 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1855 | OWEN SOUND, LAKE HURON | Unknown | 2.7 m | - | 94 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 3.9 in | Coldest |
| February | 19°F (-7°C) | 3.0 in | |
| March | 28°F (-3°C) | 2.7 in | Driest |
| April | 40°F (5°C) | 2.9 in | |
| May | 53°F (11°C) | 3.4 in | |
| June | 62°F (16°C) | 3.2 in | |
| July | 67°F (19°C) | 3.4 in | Warmest |
| August | 65°F (19°C) | 3.9 in | |
| September | 59°F (15°C) | 4.2 in | Wettest |
| October | 48°F (9°C) | 3.6 in | |
| November | 36°F (2°C) | 4.0 in | |
| December | 25°F (-4°C) | 4.0 in |
West Grey has a seasonal temperature swing of 48°F / from 18°F in January to 67°F in July. Total annual precipitation is 42.2 inches, with September being the wettest month (4.2") and March the driest (2.7").