All Countries
Weather & Climate in Saint-Thomas, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Thomas has a cool climate with an average annual temperature of 41°F (5°C). Winters average 9°F in January while summers reach 68°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 39.8 inches. The area receives 14.2 inches of snow annually. The city sits at an elevation of 108 feet.
Temperature
9°F Jan (-13°C)
68°F Jul (20°C)
| Annual Average | 40.8°F |
| 24% below US avg | |
| January Average | 9°F (-13°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 264 days/yr |
Geography
| Elevation | 108 ft (33 m) |
| Area | 36.5 sq mi (94.6 km²) |
| Population Density | 96/sq mi |
| Coordinates | 46.0168°N, 73.3492°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
115 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 84 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 100 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 83 km | 10 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 77 km | 18 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 137 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 120 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 | 150 km | 11 km |
| Oct 10, 2012 | 7 km ESE of Verchères, Canada | M3.9 | 30 km | 9 km |
| Oct 7, 1990 | 21 km WNW of La Minerve, Canada | M3.9 | 146 km | 18 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 103 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 102 km | 10 km |
| Feb 11, 2002 | 2 km WNW of Notre-Dame-des-Prairies, Canada | M3.8 | 10 km | 10 km |
| Sep 1, 2024 | 5 km SE of Pierreville, Canada | M3.8 | 46 km | 1 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 112 km | 18 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 94 km | 17 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 108 km | 10 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 97 km | 18 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 97 km | 18 km |
| Nov 6, 2012 | Ontario-Quebec border region, Canada | M3.7 | 107 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 9°F (-13°C) | 2.9 in | Coldest |
| February | 12°F (-11°C) | 2.2 in | Driest |
| March | 24°F (-5°C) | 2.2 in | |
| April | 39°F (4°C) | 3.2 in | |
| May | 54°F (12°C) | 3.4 in | |
| June | 63°F (17°C) | 4.1 in | Wettest |
| July | 68°F (20°C) | 3.7 in | Warmest |
| August | 66°F (19°C) | 3.8 in | |
| September | 57°F (14°C) | 3.8 in | |
| October | 46°F (8°C) | 3.7 in | |
| November | 34°F (1°C) | 3.8 in | |
| December | 18°F (-8°C) | 3.0 in |
Saint-Thomas has a seasonal temperature swing of 58°F / from 9°F in January to 68°F in July. Total annual precipitation is 39.8 inches, with June being the wettest month (4.1") and February the driest (2.2").