All Countries
Weather & Climate in Saint-Justin, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Justin has a cool climate with an average annual temperature of 40°F (5°C). Winters average 9°F in January while summers reach 67°F in July. The area gets 262 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 40.7 inches. The area receives 14.4 inches of snow annually. The city sits at an elevation of 154 feet.
Temperature
9°F Jan (-13°C)
67°F Jul (20°C)
| Annual Average | 40.4°F |
| 25% below US avg | |
| January Average | 9°F (-13°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 262 days/yr |
Geography
| Elevation | 154 ft (47 m) |
| Area | 30.5 sq mi (79.0 km²) |
| Population Density | 32/sq mi |
| Coordinates | 46.2520°N, 73.0865°W |
| Timezone | America/Montreal |
Precipitation & Snow
Air Quality
Earthquake History
94 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Nov 6, 1997 | 4 km W of L'Ancienne-Lorette, Canada | M4.8 | 142 km | 23 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 108 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 132 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 107 km | 10 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 105 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 148 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 145 km | 18 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 57 km | 9 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 136 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 133 km | 10 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 123 km | 17 km |
| Feb 11, 2002 | 2 km WNW of Notre-Dame-des-Prairies, Canada | M3.8 | 36 km | 10 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 130 km | 18 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 127 km | 10 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 119 km | 18 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 144 km | 18 km |
| Sep 1, 2024 | 5 km SE of Pierreville, Canada | M3.8 | 35 km | 1 km |
| Nov 6, 2012 | Ontario-Quebec border region, Canada | M3.7 | 137 km | 11 km |
| Jan 9, 2006 | 2 km ESE of Franklin, Canada | M3.7 | 150 km | 13 km |
| May 19, 1992 | 8 km WNW of Rivière-Rouge, Canada | M3.7 | 146 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 9°F (-13°C) | 2.7 in | Coldest |
| February | 12°F (-11°C) | 2.3 in | Driest |
| March | 24°F (-5°C) | 2.4 in | |
| April | 39°F (4°C) | 3.2 in | |
| May | 53°F (12°C) | 3.8 in | |
| June | 63°F (17°C) | 4.0 in | Wettest |
| July | 67°F (20°C) | 3.9 in | Warmest |
| August | 65°F (19°C) | 4.0 in | |
| September | 57°F (14°C) | 3.8 in | |
| October | 45°F (7°C) | 3.6 in | |
| November | 34°F (1°C) | 3.9 in | |
| December | 18°F (-8°C) | 3.1 in |
Saint-Justin has a seasonal temperature swing of 58°F / from 9°F in January to 67°F in July. Total annual precipitation is 40.7 inches, with June being the wettest month (4.0") and February the driest (2.3").