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Weather & Climate in St. George, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. George has a cool climate with an average annual temperature of 45°F (7°C). Winters average 21°F in January while summers reach 69°F in July. The area gets 272 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 35.5 inches. The area receives 9.1 inches of snow annually. The city sits at an elevation of 778 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 272 days/yr |
Geography
| Elevation | 778 ft (237 m) |
| Area | 51.1 sq mi (132.3 km²) |
| Population Density | 64/sq mi |
| Coordinates | 43.2450°N, 80.2514°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
12 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 | 114 km | 13 km |
| Feb 6, 2023 | 1 km NE of West Seneca, New York | M3.8 | 127 km | 6 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 112 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 118 km | 5 km |
| May 25, 1995 | 3 km NW of Amherst, New York | M3.0 | 119 km | 5 km |
| Jun 16, 2004 | 11 km NNW of Angola on the Lake, New York | M2.9 | 110 km | 6 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 79 km | 7 km |
| Mar 8, 2008 | 5 km ENE of Clarence Center, New York | M2.7 | 138 km | 6 km |
| Dec 21, 2009 | 10 km NNE of Olcott, New York | M2.7 | 130 km | 8 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 68 km | 4 km |
| Jul 11, 2017 | 11 km NNW of Barker, New York | M2.5 | 136 km | 5 km |
| Dec 17, 1990 | 5 km SSE of Middleboro, Pennsylvania | M2.5 | 144 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 |
| 1823 | LAKE ERIE | Unknown | 2.7 m | - | 123 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.1 in | Coldest |
| February | 22°F (-6°C) | 2.0 in | Driest |
| March | 31°F (-1°C) | 2.3 in | |
| April | 43°F (6°C) | 2.8 in | |
| May | 55°F (13°C) | 3.2 in | |
| June | 64°F (18°C) | 3.0 in | |
| July | 69°F (21°C) | 4.0 in | Warmest, Wettest |
| August | 67°F (20°C) | 3.5 in | |
| September | 60°F (16°C) | 3.5 in | |
| October | 49°F (9°C) | 2.9 in | |
| November | 38°F (3°C) | 3.5 in | |
| December | 27°F (-3°C) | 2.7 in |
St. George has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 35.5 inches, with July being the wettest month (4.0") and February the driest (2.0").