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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. The area gets 260 sunny days per year, above the national average. 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) |
| Sunny Days | 260 days/yr |
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").