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Weather & Climate in Blandford-Blenheim, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Blandford-Blenheim has a cool climate with an average annual temperature of 45°F (7°C). Winters average 20°F in January while summers reach 68°F in July. The area gets 268 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 37.2 inches. The area receives 10.2 inches of snow annually. The city sits at an elevation of 1,007 feet.
Temperature
20°F Jan (-7°C)
68°F Jul (20°C)
| Annual Average | 44.8°F |
| 17% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 1,007 ft (307 m) |
| Area | 147.5 sq mi (382.0 km²) |
| Population Density | 51/sq mi |
| Coordinates | 43.2463°N, 80.5986°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
10 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 146 km | 5 km |
| Nov 26, 1999 | 14 km ESE of Centennial Scarborough, Canada | M3.8 | 139 km | 13 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 150 km | 5 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 136 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 144 km | 5 km |
| May 25, 1995 | 3 km NW of Amherst, New York | M3.0 | 146 km | 5 km |
| Jun 16, 2004 | 11 km NNW of Angola on the Lake, New York | M2.9 | 135 km | 6 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 107 km | 7 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 95 km | 4 km |
| Dec 17, 1990 | 5 km SSE of Middleboro, Pennsylvania | M2.5 | 149 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis 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 | - | 111 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 2.6 in | Coldest |
| February | 21°F (-6°C) | 2.2 in | Driest |
| March | 30°F (-1°C) | 2.4 in | |
| April | 42°F (6°C) | 3.1 in | |
| May | 55°F (13°C) | 3.4 in | |
| June | 64°F (18°C) | 3.2 in | |
| July | 68°F (20°C) | 3.8 in | Warmest, Wettest |
| August | 67°F (19°C) | 3.4 in | |
| September | 60°F (15°C) | 3.5 in | |
| October | 48°F (9°C) | 3.1 in | |
| November | 38°F (3°C) | 3.7 in | |
| December | 27°F (-3°C) | 2.9 in |
Blandford-Blenheim has a seasonal temperature swing of 49°F / from 20°F in January to 68°F in July. Total annual precipitation is 37.3 inches, with July being the wettest month (3.8") and February the driest (2.2").