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Weather & Climate in South Stormont, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Stormont has a cool climate with an average annual temperature of 43°F (6°C). Winters average 13°F in January while summers reach 69°F in July. The area gets 265 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 39.4 inches. The area receives 14.7 inches of snow annually. The city sits at an elevation of 282 feet.
Temperature
13°F Jan (-10°C)
69°F Jul (21°C)
| Annual Average | 42.8°F |
| 21% below US avg | |
| January Average | 13°F (-10°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 265 days/yr |
Geography
| Elevation | 282 ft (86 m) |
| Area | 172.9 sq mi (447.7 km²) |
| Population Density | 79/sq mi |
| Coordinates | 45.0628°N, 74.9522°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
172 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 | 100 km | 19 km |
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 116 km | 5 km |
| May 17, 2013 | 20 km NNE of Shawville, Canada | M5.1 | 134 km | 13 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 111 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 65 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 110 km | 10 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 101 km | 18 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 57 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 78 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 125 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 66 km | 11 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 69 km | 8 km |
| Oct 7, 1990 | 21 km WNW of La Minerve, Canada | M3.9 | 141 km | 18 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 70 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 64 km | 5 km |
| Apr 20, 2000 | 7 km WSW of Newcomb, New York | M3.8 | 136 km | 5 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 74 km | 18 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 85 km | 18 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 123 km | 10 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 115 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 15.0 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1908 | NOTRE DAME DE LA SALETTE | Meteorological | 15.0 m | 33 | 94 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-10°C) | 3.0 in | Coldest |
| February | 16°F (-9°C) | 2.6 in | |
| March | 27°F (-3°C) | 2.5 in | Driest |
| April | 41°F (5°C) | 3.2 in | |
| May | 55°F (13°C) | 3.4 in | |
| June | 64°F (18°C) | 3.7 in | Wettest |
| July | 69°F (21°C) | 3.7 in | Warmest |
| August | 67°F (19°C) | 3.6 in | |
| September | 58°F (15°C) | 3.7 in | |
| October | 47°F (8°C) | 3.4 in | |
| November | 35°F (2°C) | 3.6 in | |
| December | 21°F (-6°C) | 3.1 in |
South Stormont has a seasonal temperature swing of 56°F / from 13°F in January to 69°F in July. Total annual precipitation is 39.4 inches, with June being the wettest month (3.7") and March the driest (2.5").