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Weather & Climate in Grey Highlands, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grey Highlands has a cool climate with an average annual temperature of 42°F (6°C). Winters average 17°F in January while summers reach 65°F in July. The area gets 256 sunny days per year, above the national average. Annual precipitation totals 44.3 inches. The area receives 20.4 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,450 feet.
Temperature
17°F Jan (-8°C)
65°F Jul (19°C)
| Annual Average | 42.0°F |
| 22% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 256 days/yr |
Geography
| Elevation | 1,450 ft (442 m) |
| Area | 339.4 sq mi (879.0 km²) |
| Population Density | 31/sq mi |
| Coordinates | 44.3565°N, 80.4604°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
7 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Nov 26, 1999 | 14 km ESE of Centennial Scarborough, Canada | M3.8 | 137 km | 13 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 125 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 139 km | 5 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 149 km | 7 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 135 km | 4 km |
| Jul 29, 2012 | 17 km SSW of Parry Sound, Canada | M2.5 | 97 km | 5 km |
| May 17, 2010 | 19 km WNW of Gravenhurst, Canada | M2.5 | 101 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 | - | 83 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 4.8 in | Coldest, Wettest |
| February | 18°F (-8°C) | 3.5 in | |
| March | 26°F (-3°C) | 3.3 in | |
| April | 39°F (4°C) | 2.7 in | Driest |
| May | 52°F (11°C) | 3.6 in | |
| June | 60°F (16°C) | 3.6 in | |
| July | 65°F (19°C) | 3.1 in | Warmest |
| August | 64°F (18°C) | 3.4 in | |
| September | 57°F (14°C) | 3.8 in | |
| October | 46°F (8°C) | 3.7 in | |
| November | 35°F (2°C) | 4.5 in | |
| December | 23°F (-5°C) | 4.4 in |
Grey Highlands has a seasonal temperature swing of 48°F / from 17°F in January to 65°F in July. Total annual precipitation is 44.3 inches, with January being the wettest month (4.8") and April the driest (2.7").