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Weather & Climate in Acton, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Acton experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 28°F in January while summers reach 69°F in July. The area gets 239 sunny days per year, above the national average. Annual precipitation totals 37.9 inches. The area receives 57.7 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 1,145 feet.
Temperature
28°F Jan (-2°C)
69°F Jul (21°C)
| Annual Average | 47.5°F |
| 12% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 239 days/yr |
Geography
| Elevation | 1,145 ft (349 m) |
| Area | 140.7 sq mi (364.3 km²) |
| Population Density | 67/sq mi |
| Coordinates | 43.6297°N, 80.0415°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
15 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 | 85 km | 13 km |
| Feb 6, 2023 | 1 km NE of West Seneca, New York | M3.8 | 133 km | 6 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 78 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 89 km | 5 km |
| May 25, 1995 | 3 km NW of Amherst, New York | M3.0 | 121 km | 5 km |
| Aug 4, 2004 | 30 km SSW of Cobourg, Canada | M3.0 | 144 km | 5 km |
| Jul 19, 2007 | 27 km S of Cobourg, Canada | M3.0 | 149 km | 5 km |
| Jun 16, 2004 | 11 km NNW of Angola on the Lake, New York | M2.9 | 125 km | 6 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 70 km | 7 km |
| Mar 8, 2008 | 5 km ENE of Clarence Center, New York | M2.7 | 136 km | 6 km |
| Dec 21, 2009 | 10 km NNE of Olcott, New York | M2.7 | 113 km | 8 km |
| Mar 29, 2020 | 11 km N of Lyndonville, New York | M2.6 | 137 km | 5 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 56 km | 4 km |
| Jul 11, 2017 | 11 km NNW of Barker, New York | M2.5 | 119 km | 5 km |
| Feb 13, 2014 | 34 km N of Lyndonville, New York | M2.5 | 132 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.3 in | |
| February | 20°F (-7°C) | 2.2 in | Coldest, Driest |
| March | 28°F (-2°C) | 2.4 in | |
| April | 41°F (5°C) | 2.9 in | |
| May | 53°F (12°C) | 3.3 in | |
| June | 62°F (17°C) | 3.1 in | |
| July | 69°F (21°C) | 3.6 in | Warmest, Wettest |
| August | 66°F (19°C) | 3.5 in | |
| September | 59°F (15°C) | 3.5 in | |
| October | 47°F (8°C) | 2.9 in | |
| November | 37°F (3°C) | 3.5 in | |
| December | 25°F (-4°C) | 2.8 in |
Acton has a seasonal temperature swing of 49°F / from 20°F in February to 69°F in July. Total annual precipitation is 35.9 inches, with July being the wettest month (3.6") and February the driest (2.2").