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Weather & Climate in L'Assomption, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
L'Assomption experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 22°F in January while summers reach 72°F in July. The area gets 237 sunny days per year, above the national average. Annual precipitation totals 50.6 inches (wetter than the 38-inch national average). The area receives 76.4 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 46 feet.
Temperature
22°F Jan (-6°C)
72°F Jul (22°C)
| Annual Average | 46.3°F |
| 14% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 237 days/yr |
Geography
| Elevation | 46 ft (14 m) |
| Area | 38.1 sq mi (98.7 km²) |
| Population Density | 615/sq mi |
| Coordinates | 45.8232°N, 73.4294°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
127 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 147 km | 5 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 80 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 84 km | 18 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 69 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 79 km | 10 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 124 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 111 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 126 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 139 km | 11 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 15 km | 9 km |
| Oct 7, 1990 | 21 km WNW of La Minerve, Canada | M3.9 | 147 km | 18 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 83 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 89 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 142 km | 5 km |
| Sep 1, 2024 | 5 km SE of Pierreville, Canada | M3.8 | 58 km | 1 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 72 km | 17 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 90 km | 18 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 75 km | 18 km |
| Feb 11, 2002 | 2 km WNW of Notre-Dame-des-Prairies, Canada | M3.8 | 26 km | 10 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 95 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 2.8 in | |
| February | 14°F (-10°C) | 2.4 in | Coldest, Driest |
| March | 25°F (-4°C) | 2.5 in | |
| April | 40°F (5°C) | 2.9 in | |
| May | 55°F (13°C) | 3.2 in | |
| June | 64°F (18°C) | 3.7 in | |
| July | 72°F (22°C) | 3.5 in | Warmest |
| August | 68°F (20°C) | 3.6 in | |
| September | 59°F (15°C) | 3.5 in | |
| October | 47°F (8°C) | 3.5 in | |
| November | 35°F (2°C) | 3.7 in | Wettest |
| December | 20°F (-7°C) | 3.3 in |
L'Assomption has a seasonal temperature swing of 58°F / from 14°F in February to 72°F in July. Total annual precipitation is 38.5 inches, with November being the wettest month (3.7") and February the driest (2.4").