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Weather & Climate in Grand Manan, NB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grand Manan has a cool climate with an average annual temperature of 43°F (6°C). Winters average 20°F in January while summers reach 64°F in July. The area gets 247 sunny days per year, above the national average. Annual precipitation totals 49.3 inches (wetter than the 38-inch national average). The area receives 17.8 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 318 feet.
Temperature
20°F Jan (-6°C)
64°F Jul (18°C)
| Annual Average | 43.0°F |
| 20% below US avg | |
| January Average | 20°F (-6°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 247 days/yr |
Geography
| Elevation | 318 ft (97 m) |
| Area | 58.1 sq mi (150.6 km²) |
| Population Density | 45/sq mi |
| Coordinates | 44.6982°N, 66.8211°W |
| Timezone | America/Moncton |
Precipitation & Snow
Air Quality
Earthquake History
39 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Sep 16, 1994 | 7 km SE of Lee, Maine | M3.6 | 129 km | 5 km |
| Feb 2, 2016 | 8 km E of Lubec, Maine | M3.6 | 20 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.6 | 127 km | 5 km |
| Jul 1, 2015 | 30 km NNW of Yarmouth, Canada | M3.5 | 82 km | 5 km |
| Jan 10, 2019 | 22 km NW of Saint John, Canada | M3.4 | 87 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 127 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 127 km | 5 km |
| Jan 14, 2023 | 7 km ESE of Dedham, Maine | M3.3 | 139 km | 10 km |
| Feb 9, 2016 | 7 km NE of Vanceboro, Maine | M3.3 | 109 km | 1 km |
| Jul 25, 2010 | 35 km S of Fundy Bay, Canada | M3.2 | 31 km | 5 km |
| Oct 15, 2003 | 11 km E of Saint Andrews, Canada | M3.1 | 43 km | 18 km |
| Jun 9, 2016 | 24 km S of Yarmouth, Canada | M3.0 | 131 km | 5 km |
| Aug 17, 2022 | 3 km SE of Centerville, Maine | M3.0 | 65 km | 5 km |
| Jun 20, 2015 | 37 km SE of Digby, Canada | M2.9 | 117 km | 5 km |
| Jan 17, 2021 | 4 km ESE of Centerville, Maine | M2.9 | 64 km | 5 km |
| Mar 14, 2018 | 16 km WNW of Saint John, Canada | M2.9 | 85 km | 2 km |
| Aug 11, 2022 | Maine | M2.8 | 63 km | 4 km |
| Aug 11, 2022 | 4 km E of Centerville, Maine | M2.8 | 64 km | 6 km |
| Jul 29, 2010 | 5 km WNW of Northfield, Maine | M2.7 | 67 km | 4 km |
| Mar 25, 2011 | 6 km NNE of Burlington, Maine | M2.7 | 138 km | 9 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
5 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 | 189 km |
| 2009 | Bill | Category 1 | 81 mph | 261 km |
| 2008 | Kyle | Category 1 | 75 mph | 112 km |
| 2003 | Juan | Category 2 | 98 mph | 242 km |
| 1996 | Hortense | Category 1 | 86 mph | 254 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: SUNKEN STR (1,201 acres, 1985).
| Year | Name | Acres Burned | Distance |
| 1985 | SUNKEN STR | 1,201 | 35 km |
| 1984 | UNNAMED | 901 | 63 km |
| 2006 | CENTERVILLE FIRE | 705 | 70 km |
| 2001 | UNNAMED | 627 | 69 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-6°C) | 4.9 in | Coldest |
| February | 22°F (-5°C) | 3.5 in | |
| March | 30°F (-1°C) | 4.5 in | |
| April | 40°F (5°C) | 3.9 in | |
| May | 50°F (10°C) | 4.0 in | |
| June | 58°F (15°C) | 3.4 in | |
| July | 64°F (18°C) | 3.1 in | Warmest |
| August | 64°F (18°C) | 3.0 in | Driest |
| September | 57°F (14°C) | 4.3 in | |
| October | 47°F (8°C) | 4.6 in | |
| November | 38°F (3°C) | 5.1 in | Wettest |
| December | 27°F (-3°C) | 4.8 in |
Grand Manan has a seasonal temperature swing of 43°F / from 20°F in January to 64°F in July. Total annual precipitation is 49.3 inches, with November being the wettest month (5.1") and August the driest (3.0").