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Weather & Climate in Dieppe, NB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dieppe has a cool climate with an average annual temperature of 45°F (7°C). Winters average 21°F in January while summers reach 71°F in July. The area gets 252 sunny days per year, above the national average. Annual precipitation totals 57.7 inches (wetter than the 38-inch national average). The area receives 91.4 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 144 feet.
Temperature
21°F Jan (-6°C)
71°F Jul (21°C)
| Annual Average | 45.3°F |
| 16% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 71°F (21°C) |
| Sunny Days | 252 days/yr |
Geography
| Elevation | 144 ft (44 m) |
| Area | 29.7 sq mi (77.0 km²) |
| Population Density | 945/sq mi |
| Coordinates | 46.0784°N, 64.6874°W |
| Timezone | America/Moncton |
Precipitation & Snow
Air Quality
Earthquake History
19 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Mar 8, 2009 | 72 km NNE of Noonan, Canada | M3.6 | 137 km | 5 km |
| Aug 27, 2015 | 27 km N of Noonan, Canada | M3.6 | 148 km | 5 km |
| Jan 10, 2019 | 22 km NW of Saint John, Canada | M3.4 | 147 km | 5 km |
| Mar 8, 2009 | 71 km NNE of Noonan, Canada | M3.3 | 132 km | 5 km |
| Jul 20, 2007 | 28 km W of Miramichi, Canada | M3.2 | 143 km | 5 km |
| Mar 21, 2013 | 60 km NNE of Noonan, Canada | M3.2 | 117 km | 5 km |
| Jul 3, 2024 | 67 km SW of Miramichi, Canada | M3.1 | 120 km | 12 km |
| Apr 22, 2016 | New Brunswick, Canada | M2.9 | 111 km | 5 km |
| Jun 20, 2013 | 65 km NNE of Noonan, Canada | M2.9 | 130 km | 5 km |
| Mar 7, 2019 | 15 km WSW of Miramichi, Canada | M2.9 | 125 km | 10 km |
| Mar 14, 2018 | 16 km WNW of Saint John, Canada | M2.9 | 146 km | 2 km |
| Nov 28, 2013 | 55 km NNW of Sussex, Canada | M2.8 | 87 km | 5 km |
| Jan 3, 2017 | 20 km E of Oromocto, Canada | M2.7 | 121 km | 5 km |
| Mar 7, 2008 | 32 km S of Miramichi, Canada | M2.7 | 93 km | 5 km |
| Feb 2, 2018 | 55 km NNW of Sussex, Canada | M2.6 | 90 km | 2 km |
| Apr 22, 2016 | 69 km SSW of Miramichi, Canada | M2.6 | 112 km | 5 km |
| Nov 28, 2013 | 60 km SSW of Miramichi, Canada | M2.6 | 95 km | 5 km |
| Feb 1, 2018 | 54 km NNW of Sussex, Canada | M2.6 | 89 km | 2 km |
| Apr 24, 2015 | 67 km NW of Salisbury, Canada | M2.5 | 90 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 | 132 km |
| 2009 | Bill | Category 1 | 75 mph | 253 km |
| 2008 | Kyle | Category 1 | 75 mph | 280 km |
| 2003 | Juan | Category 2 | 98 mph | 69 km |
| 2002 | Gustav | Category 1 | 92 mph | 299 km |
| 1996 | Hortense | Category 1 | 81 mph | 222 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 4.3 in | |
| February | 19°F (-7°C) | 3.5 in | Coldest |
| March | 28°F (-2°C) | 4.1 in | |
| April | 39°F (4°C) | 3.5 in | |
| May | 51°F (10°C) | 3.9 in | |
| June | 60°F (16°C) | 4.0 in | |
| July | 71°F (21°C) | 3.9 in | Warmest |
| August | 66°F (19°C) | 3.4 in | Driest |
| September | 57°F (14°C) | 3.5 in | |
| October | 46°F (8°C) | 3.9 in | |
| November | 36°F (2°C) | 4.1 in | |
| December | 23°F (-5°C) | 4.4 in | Wettest |
Dieppe has a seasonal temperature swing of 52°F / from 19°F in February to 71°F in July. Total annual precipitation is 46.4 inches, with December being the wettest month (4.4") and August the driest (3.4").