All Countries
Weather & Climate in Châteauguay, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Châteauguay experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 17°F in January while summers reach 72°F in July. The area gets 266 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 49.9 inches (wetter than the 38-inch national average). The area receives 67.1 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 56 feet.
Temperature
17°F Jan (-8°C)
72°F Jul (22°C)
| Annual Average | 46.8°F |
| 13% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 266 days/yr |
Geography
| Elevation | 56 ft (17 m) |
| Area | 13.3 sq mi (34.3 km²) |
| Population Density | 3,836/sq mi |
| Coordinates | 45.3834°N, 73.7492°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
152 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.
| Jun 23, 2010 | 29 km NNE of Val-des-Monts, Canada | M5.4 | 145 km | 19 km |
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 97 km | 5 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 86 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 52 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 84 km | 10 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 68 km | 18 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 99 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 96 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 130 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 116 km | 11 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 56 km | 9 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 32 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 67 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 118 km | 5 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 35 km | 18 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 101 km | 18 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 115 km | 10 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 20 km | 18 km |
| Feb 11, 2002 | 2 km WNW of Notre-Dame-des-Prairies, Canada | M3.8 | 79 km | 10 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 30 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: FLAT ROCK FIRE (658 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | FLAT ROCK FIRE | 658 | 58 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.9 in | |
| February | 17°F (-8°C) | 2.4 in | Coldest, Driest |
| March | 28°F (-2°C) | 2.8 in | |
| April | 42°F (6°C) | 3.1 in | |
| May | 56°F (13°C) | 3.1 in | |
| June | 65°F (18°C) | 3.4 in | |
| July | 72°F (22°C) | 3.7 in | Warmest, Wettest |
| August | 68°F (20°C) | 3.7 in | |
| September | 60°F (15°C) | 3.6 in | |
| October | 48°F (9°C) | 3.2 in | |
| November | 36°F (2°C) | 3.6 in | |
| December | 22°F (-6°C) | 3.3 in |
Châteauguay has a seasonal temperature swing of 56°F / from 17°F in February to 72°F in July. Total annual precipitation is 38.6 inches, with July being the wettest month (3.7") and February the driest (2.4").