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Weather & Climate in North Grenville, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
North Grenville has a cool climate with an average annual temperature of 43°F (6°C). Winters average 14°F in January while summers reach 69°F in July. The area gets 270 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 36.2 inches. The area receives 13.5 inches of snow annually. The city sits at an elevation of 367 feet.
Temperature
14°F Jan (-10°C)
69°F Jul (21°C)
| Annual Average | 42.8°F |
| 21% below US avg | |
| January Average | 14°F (-10°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 367 ft (112 m) |
| Area | 135.9 sq mi (351.9 km²) |
| Population Density | 132/sq mi |
| Coordinates | 44.9858°N, 75.6448°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
144 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 | 101 km | 19 km |
| May 17, 2013 | 20 km NNE of Shawville, Canada | M5.1 | 102 km | 13 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 146 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 113 km | 18 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 141 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 146 km | 10 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 83 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 144 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 106 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 79 km | 11 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 124 km | 8 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 112 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 76 km | 5 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 140 km | 18 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 145 km | 18 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 129 km | 18 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 149 km | 10 km |
| Nov 6, 2012 | Ontario-Quebec border region, Canada | M3.7 | 108 km | 11 km |
| Jan 9, 2006 | 2 km ESE of Franklin, Canada | M3.7 | 139 km | 13 km |
| Sep 12, 1995 | 8 km S of Brownsburg-Chatham, Canada | M3.7 | 118 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 | 87 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 14°F (-10°C) | 2.4 in | Coldest |
| February | 16°F (-9°C) | 2.4 in | Driest |
| March | 27°F (-3°C) | 2.4 in | |
| April | 42°F (5°C) | 3.0 in | |
| May | 55°F (13°C) | 3.1 in | |
| June | 64°F (18°C) | 3.0 in | |
| July | 69°F (21°C) | 3.4 in | Warmest |
| August | 67°F (19°C) | 3.5 in | Wettest |
| September | 58°F (15°C) | 3.5 in | |
| October | 47°F (8°C) | 3.1 in | |
| November | 35°F (2°C) | 3.3 in | |
| December | 21°F (-6°C) | 3.1 in |
North Grenville has a seasonal temperature swing of 55°F / from 14°F in January to 69°F in July. Total annual precipitation is 36.2 inches, with August being the wettest month (3.5") and February the driest (2.4").