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Weather & Climate in Saint-Marc-sur-Richelieu, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Marc-sur-Richelieu has a cool climate with an average annual temperature of 42°F (6°C). Winters average 12°F in January while summers reach 69°F in July. The area gets 264 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 39.7 inches. The area receives 14.8 inches of snow annually. The city sits at an elevation of 33 feet.
Temperature
12°F Jan (-11°C)
69°F Jul (20°C)
| Annual Average | 42.1°F |
| 22% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 264 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 23.5 sq mi (60.9 km²) |
| Population Density | 96/sq mi |
| Coordinates | 45.6834°N, 73.1992°W |
| Timezone | America/Montreal |
Precipitation & Snow
Air Quality
Earthquake History
108 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 | 136 km | 5 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 101 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 96 km | 18 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 89 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 100 km | 10 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 140 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 148 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 129 km | 18 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 10 km | 9 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 86 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 104 km | 10 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 60 km | 17 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 89 km | 18 km |
| Sep 1, 2024 | 5 km SE of Pierreville, Canada | M3.8 | 53 km | 1 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 74 km | 18 km |
| Feb 11, 2002 | 2 km WNW of Notre-Dame-des-Prairies, Canada | M3.8 | 47 km | 10 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 117 km | 18 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 130 km | 10 km |
| Nov 6, 2012 | Ontario-Quebec border region, Canada | M3.7 | 109 km | 11 km |
| Jan 9, 2006 | 2 km ESE of Franklin, Canada | M3.7 | 91 km | 13 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 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 12°F (-11°C) | 2.9 in | Coldest |
| February | 14°F (-10°C) | 2.4 in | Driest |
| March | 26°F (-4°C) | 2.5 in | |
| April | 40°F (5°C) | 3.0 in | |
| May | 55°F (13°C) | 3.4 in | |
| June | 64°F (18°C) | 3.8 in | |
| July | 69°F (20°C) | 3.7 in | Warmest |
| August | 67°F (20°C) | 3.9 in | Wettest |
| September | 58°F (15°C) | 3.5 in | |
| October | 47°F (8°C) | 3.7 in | |
| November | 35°F (2°C) | 3.7 in | |
| December | 20°F (-7°C) | 3.4 in |
Saint-Marc-sur-Richelieu has a seasonal temperature swing of 57°F / from 12°F in January to 69°F in July. Total annual precipitation is 39.7 inches, with August being the wettest month (3.9") and February the driest (2.4").