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Weather & Climate in Grosse-Île, QC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grosse-Île has a cool climate with an average annual temperature of 40°F (5°C). Winters average 20°F in January while summers reach 61°F in July. The area gets 263 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 40.2 inches. The area receives 17.2 inches of snow annually, a moderate snowfall amount.
Temperature
20°F Jan (-7°C)
61°F Jul (16°C)
| Annual Average | 40.1°F |
| 26% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 263 days/yr |
Geography
| Area | 12.5 sq mi (32.3 km²) |
| Population Density | 37/sq mi |
| Coordinates | 47.6003°N, 61.5216°W |
| Timezone | America/Montreal |
Precipitation & Snow
Air Quality
Hurricane History
6 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2010 | Earl | Category 1 | 75 mph | 267 km |
| 2009 | Bill | Category 1 | 75 mph | 262 km |
| 2003 | Juan | Category 1 | 75 mph | 249 km |
| 2002 | Gustav | Category 1 | 92 mph | 190 km |
| 1996 | Hortense | Category 1 | 75 mph | 234 km |
| 1990 | Bertha | Category 1 | — | 296 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 3.9 in | |
| February | 18°F (-8°C) | 3.0 in | Coldest |
| March | 25°F (-4°C) | 3.1 in | |
| April | 34°F (1°C) | 2.9 in | |
| May | 43°F (6°C) | 2.9 in | |
| June | 52°F (11°C) | 2.8 in | |
| July | 61°F (16°C) | 2.7 in | Driest |
| August | 63°F (17°C) | 3.2 in | Warmest |
| September | 56°F (13°C) | 3.4 in | |
| October | 46°F (8°C) | 3.9 in | |
| November | 37°F (3°C) | 4.1 in | |
| December | 27°F (-3°C) | 4.3 in | Wettest |
Grosse-Île has a seasonal temperature swing of 45°F / from 18°F in February to 63°F in August. Total annual precipitation is 40.2 inches, with December being the wettest month (4.3") and July the driest (2.7").