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Weather & Climate in Cornwallis, MB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cornwallis has a cool climate with an average annual temperature of 43°F (6°C). Winters average 22°F in January while summers reach 64°F in July. The area gets 239 sunny days per year, above the national average. Annual precipitation totals 53.4 inches (wetter than the 38-inch national average). The area receives 20.2 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 98 feet.
Temperature
22°F Jan (-6°C)
64°F Jul (18°C)
| Annual Average | 43.2°F |
| 20% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 239 days/yr |
Geography
| Elevation | 98 ft (30 m) |
| Area | 193.3 sq mi (500.5 km²) |
| Population Density | 24/sq mi |
| Coordinates | 44.6523°N, 65.6299°W |
| Timezone | America/Winnipeg |
Precipitation & Snow
Air Quality
Earthquake History
17 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Feb 2, 2016 | 8 km E of Lubec, Maine | M3.6 | 102 km | 5 km |
| Jul 1, 2015 | 30 km NNW of Yarmouth, Canada | M3.5 | 80 km | 5 km |
| Jan 10, 2019 | 22 km NW of Saint John, Canada | M3.4 | 97 km | 5 km |
| Jul 16, 2007 | 18 km WSW of Bridgewater, Canada | M3.2 | 82 km | 5 km |
| Jul 25, 2010 | 35 km S of Fundy Bay, Canada | M3.2 | 100 km | 5 km |
| Oct 15, 2003 | 11 km E of Saint Andrews, Canada | M3.1 | 112 km | 18 km |
| Jun 9, 2016 | 24 km S of Yarmouth, Canada | M3.0 | 123 km | 5 km |
| Jun 20, 2015 | 37 km SE of Digby, Canada | M2.9 | 34 km | 5 km |
| Mar 14, 2018 | 16 km WNW of Saint John, Canada | M2.9 | 90 km | 2 km |
| Jan 3, 2017 | 20 km E of Oromocto, Canada | M2.7 | 142 km | 5 km |
| Feb 10, 2021 | 28 km W of Yarmouth, Canada | M2.6 | 112 km | 15 km |
| Jan 31, 2011 | 2 km S of Robbinston, Maine | M2.6 | 125 km | 7 km |
| Jan 11, 2022 | 8 km SE of Saint Andrews, Canada | M2.6 | 114 km | 5 km |
| Feb 17, 2015 | 12 km N of Saint Andrews, Canada | M2.5 | 127 km | 5 km |
| Feb 17, 2012 | 8 km ENE of Northfield, Maine | M2.5 | 148 km | 12 km |
| Jun 27, 2015 | 38 km SE of Digby, Canada | M2.5 | 35 km | 5 km |
| May 29, 2014 | 52 km SW of Digby, Canada | M2.5 | 63 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
6 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2010 | Earl | Category 1 | 75 mph | 98 km |
| 2009 | Bill | Category 1 | 81 mph | 185 km |
| 2008 | Kyle | Category 1 | 75 mph | 105 km |
| 2003 | Juan | Category 2 | 98 mph | 148 km |
| 2002 | Gustav | Category 1 | 92 mph | 285 km |
| 1996 | Hortense | Category 1 | 86 mph | 180 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 5.6 in | Coldest |
| February | 22°F (-6°C) | 4.3 in | |
| March | 30°F (-1°C) | 4.7 in | |
| April | 40°F (4°C) | 4.3 in | |
| May | 50°F (10°C) | 4.0 in | |
| June | 59°F (15°C) | 3.8 in | |
| July | 64°F (18°C) | 3.5 in | Warmest |
| August | 64°F (18°C) | 3.3 in | Driest |
| September | 56°F (14°C) | 4.3 in | |
| October | 47°F (8°C) | 4.4 in | |
| November | 38°F (3°C) | 5.6 in | |
| December | 27°F (-3°C) | 5.6 in | Wettest |
Cornwallis has a seasonal temperature swing of 43°F / from 22°F in January to 64°F in July. Total annual precipitation is 53.3 inches, with December being the wettest month (5.6") and August the driest (3.3").