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Weather & Climate in Saint-Sébastien, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Sébastien has a cool climate with an average annual temperature of 38°F (3°C). Winters average 10°F in January while summers reach 63°F in July. The area gets 249 sunny days per year, above the national average. Annual precipitation totals 47.7 inches (wetter than the 38-inch national average). The area receives 20.8 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,624 feet.
Temperature
10°F Jan (-12°C)
63°F Jul (17°C)
| Annual Average | 37.9°F |
| 30% below US avg | |
| January Average | 10°F (-12°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 249 days/yr |
Geography
| Elevation | 1,624 ft (495 m) |
| Area | 24.4 sq mi (63.3 km²) |
| Population Density | 28/sq mi |
| Coordinates | 45.7819°N, 70.9685°W |
| Timezone | America/Montreal |
Precipitation & Snow
Air Quality
Earthquake History
35 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 | 118 km | 23 km |
| Sep 1, 2024 | 5 km SE of Pierreville, Canada | M3.8 | 141 km | 1 km |
| Jan 17, 2000 | 4 km NNE of Dixfield, Maine | M3.6 | 141 km | 16 km |
| Jul 23, 2010 | 18 km S of Saint-Antoine-de-Tilly, Canada | M3.5 | 94 km | 18 km |
| Aug 27, 2011 | 24 km SSW of Montmagny, Canada | M3.5 | 113 km | 18 km |
| Apr 3, 1997 | 9 km ENE of Saint-Cyrille-de-Wendover, Canada | M3.5 | 108 km | 5 km |
| Aug 7, 2010 | 8 km WNW of Montmagny, Canada | M3.5 | 139 km | 25 km |
| Apr 29, 2009 | 7 km SSE of L'Ange-Gardien, Canada | M3.4 | 119 km | 18 km |
| Jan 4, 2018 | 18 km SSE of Beaupré, Canada | M3.4 | 125 km | 18 km |
| Apr 24, 2010 | 11 km NNW of Château-Richer, Canada | M3.3 | 142 km | 18 km |
| Mar 6, 2010 | 1 km WNW of Beaupré, Canada | M3.2 | 141 km | 18 km |
| Oct 8, 2010 | 16 km NW of Montmagny, Canada | M3.1 | 149 km | 28 km |
| Apr 15, 2010 | 7 km WNW of Valcourt, Canada | M3.0 | 115 km | 18 km |
| May 22, 2017 | 4 km NW of Beaupré, Canada | M3.0 | 143 km | 18 km |
| May 11, 2006 | 7 km W of Nicolet, Canada | M3.0 | 144 km | 5 km |
| Nov 6, 1997 | 4 km SSW of L'Ancienne-Lorette, Canada | M2.9 | 113 km | 18 km |
| Nov 8, 1997 | 2 km SW of L'Ancienne-Lorette, Canada | M2.9 | 115 km | 23 km |
| Jan 3, 2018 | 18 km SSE of Beaupré, Canada | M2.9 | 125 km | 18 km |
| Nov 9, 2009 | southern Quebec, Canada | M2.9 | 114 km | 18 km |
| Mar 24, 2007 | 7 km W of Sainte-Catherine, Canada | M2.8 | 144 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 10°F (-12°C) | 3.4 in | Coldest |
| February | 12°F (-11°C) | 3.0 in | Driest |
| March | 22°F (-5°C) | 3.3 in | |
| April | 35°F (2°C) | 3.2 in | |
| May | 49°F (10°C) | 4.0 in | |
| June | 58°F (15°C) | 4.9 in | |
| July | 63°F (17°C) | 4.7 in | Warmest |
| August | 62°F (17°C) | 5.2 in | Wettest |
| September | 53°F (12°C) | 4.1 in | |
| October | 42°F (6°C) | 4.1 in | |
| November | 31°F (-1°C) | 4.0 in | |
| December | 17°F (-9°C) | 3.9 in |
Saint-Sébastien has a seasonal temperature swing of 54°F / from 10°F in January to 63°F in July. Total annual precipitation is 47.7 inches, with August being the wettest month (5.2") and February the driest (3.0").