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Weather & Climate in Dumbarton, NB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dumbarton has a cool climate with an average annual temperature of 42°F (5°C). Winters average 15°F in January while summers reach 66°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 46.9 inches (wetter than the 38-inch national average). The area receives 19.9 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 249 feet.
Temperature
15°F Jan (-9°C)
66°F Jul (19°C)
| Annual Average | 41.7°F |
| 23% below US avg | |
| January Average | 15°F (-9°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 249 ft (76 m) |
| Area | 144.1 sq mi (373.2 km²) |
| Population Density | 2/sq mi |
| Coordinates | 45.3756°N, 67.1307°W |
| Timezone | America/Moncton |
Precipitation & Snow
Air Quality
Earthquake History
45 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Aug 27, 2015 | 27 km N of Noonan, Canada | M3.6 | 102 km | 5 km |
| Feb 2, 2016 | 8 km E of Lubec, Maine | M3.6 | 60 km | 5 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.6 | 84 km | 5 km |
| Sep 16, 1994 | 7 km SE of Lee, Maine | M3.6 | 86 km | 5 km |
| Mar 8, 2009 | 72 km NNE of Noonan, Canada | M3.6 | 150 km | 5 km |
| Jun 1, 2006 | 19 km NE of Florenceville-Bristol, Canada | M3.6 | 136 km | 5 km |
| Jan 10, 2019 | 22 km NW of Saint John, Canada | M3.4 | 66 km | 5 km |
| Feb 9, 2016 | 7 km NE of Vanceboro, Maine | M3.3 | 31 km | 1 km |
| Jan 14, 2023 | 7 km ESE of Dedham, Maine | M3.3 | 139 km | 10 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 84 km | 5 km |
| Oct 25, 2001 | 4 km S of Howland, Maine | M3.3 | 122 km | 9 km |
| Sep 16, 1994 | 9 km SE of Lee, Maine | M3.3 | 84 km | 5 km |
| Mar 21, 2013 | 60 km NNE of Noonan, Canada | M3.2 | 141 km | 5 km |
| Jul 25, 2010 | 35 km S of Fundy Bay, Canada | M3.2 | 108 km | 5 km |
| Oct 15, 2003 | 11 km E of Saint Andrews, Canada | M3.1 | 37 km | 18 km |
| Aug 17, 2022 | 3 km SE of Centerville, Maine | M3.0 | 86 km | 5 km |
| Mar 30, 2010 | 7 km WSW of Dedham, Maine | M3.0 | 150 km | 4 km |
| Jan 17, 2021 | 4 km ESE of Centerville, Maine | M2.9 | 86 km | 5 km |
| Jun 20, 2013 | 65 km NNE of Noonan, Canada | M2.9 | 144 km | 5 km |
| Mar 14, 2018 | 16 km WNW of Saint John, Canada | M2.9 | 70 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
3 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 | 239 km |
| 2008 | Kyle | Category 1 | 75 mph | 190 km |
| 2003 | Juan | Category 2 | 98 mph | 268 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 | 60 km |
| 1984 | UNNAMED | 901 | 96 km |
| 2006 | CENTERVILLE FIRE | 705 | 88 km |
| 2001 | UNNAMED | 627 | 99 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-9°C) | 4.2 in | Coldest |
| February | 18°F (-8°C) | 2.9 in | Driest |
| March | 28°F (-2°C) | 3.9 in | |
| April | 40°F (4°C) | 3.9 in | |
| May | 52°F (11°C) | 4.3 in | |
| June | 60°F (16°C) | 3.7 in | |
| July | 66°F (19°C) | 3.8 in | Warmest |
| August | 65°F (18°C) | 3.5 in | |
| September | 56°F (13°C) | 3.7 in | |
| October | 45°F (7°C) | 4.0 in | |
| November | 34°F (1°C) | 4.6 in | Wettest |
| December | 22°F (-6°C) | 4.3 in |
Dumbarton has a seasonal temperature swing of 51°F / from 15°F in January to 66°F in July. Total annual precipitation is 46.9 inches, with November being the wettest month (4.6") and February the driest (2.9").