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Weather & Climate in Cornwall, PE
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cornwall has a cool climate with an average annual temperature of 45°F (7°C). Winters average 29°F in January while summers reach 70°F in July. The area gets 213 sunny days per year. Annual precipitation totals 54.1 inches (wetter than the 38-inch national average). The area receives 67.8 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 52 feet.
Temperature
29°F Jan (-2°C)
70°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 213 days/yr |
Geography
| Elevation | 52 ft (16 m) |
| Area | 10.9 sq mi (28.2 km²) |
| Population Density | 604/sq mi |
| Coordinates | 46.2265°N, 63.2181°W |
| Timezone | America/Halifax |
Precipitation & Snow
Air Quality
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 | 81 km |
| 2009 | Bill | Category 1 | 75 mph | 211 km |
| 2003 | Juan | Category 2 | 98 mph | 51 km |
| 2002 | Gustav | Category 1 | 92 mph | 214 km |
| 1996 | Hortense | Category 1 | 81 mph | 156 km |
| 1990 | Bertha | Category 1 | 81 mph | 266 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 4.0 in | |
| February | 18°F (-8°C) | 3.2 in | Coldest, Driest |
| March | 26°F (-3°C) | 3.5 in | |
| April | 37°F (3°C) | 3.4 in | |
| May | 48°F (9°C) | 3.8 in | |
| June | 58°F (14°C) | 3.5 in | |
| July | 70°F (21°C) | 3.2 in | Warmest |
| August | 65°F (18°C) | 3.2 in | |
| September | 57°F (14°C) | 3.9 in | |
| October | 47°F (8°C) | 4.1 in | |
| November | 38°F (3°C) | 4.2 in | |
| December | 26°F (-4°C) | 4.5 in | Wettest |
Cornwall has a seasonal temperature swing of 52°F / from 18°F in February to 70°F in July. Total annual precipitation is 44.4 inches, with December being the wettest month (4.5") and February the driest (3.2").