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Weather & Climate in Fort Simpson, NT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Fort Simpson has a cool climate with an average annual temperature of 27°F (-3°C). Winters average -11°F in January while summers reach 62°F in July / a wide seasonal temperature swing of 73°F. The area gets 307 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 15.8 inches (drier than the 38-inch national average). The area receives 5.7 inches of snow annually. The city sits at an elevation of 420 feet.
Temperature
-11°F Jan (-24°C)
62°F Jul (17°C)
| Annual Average | 27.1°F |
| 50% below US avg | |
| January Average | -11°F (-24°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 307 days/yr |
Geography
| Elevation | 420 ft (128 m) |
| Area | 30.1 sq mi (77.9 km²) |
| Population Density | 37/sq mi |
| Coordinates | 61.8627°N, 121.3516°W |
| Timezone | America/Edmonton |
Precipitation & Snow
Air Quality
Earthquake History
22 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Jul 12, 2013 | Northwest Territories, Canada | M4.7 | 146 km | 1 km |
| Jul 26, 1999 | Northwest Territories, Canada | M4.6 | 149 km | 10 km |
| Aug 22, 1994 | Northwest Territories, Canada | M4.4 | 147 km | 10 km |
| Apr 23, 2006 | Northwest Territories, Canada | M4.3 | 146 km | 1 km |
| Apr 8, 1994 | Northwest Territories, Canada | M4.3 | 138 km | 10 km |
| Sep 3, 2004 | Northwest Territories, Canada | M4.2 | 143 km | 1 km |
| Jul 30, 2011 | Northwest Territories, Canada | M4.1 | 148 km | 1 km |
| Jun 16, 2015 | Northwest Territories, Canada | M4.1 | 141 km | 15 km |
| Jun 12, 2011 | Northwest Territories, Canada | M4.1 | 145 km | 1 km |
| Jan 18, 2023 | Northwest Territories, Canada | M4.0 | 143 km | 12 km |
| Jun 9, 1997 | Northwest Territories, Canada | M4.0 | 143 km | 10 km |
| Jan 26, 2002 | Northwest Territories, Canada | M3.9 | 144 km | 10 km |
| May 20, 1998 | Northwest Territories, Canada | M3.8 | 140 km | 0 km |
| Dec 10, 2001 | 185 km W of Hay River, Canada | M3.7 | 142 km | 20 km |
| Jun 7, 1997 | Northwest Territories, Canada | M3.6 | 144 km | 10 km |
| Oct 12, 1994 | Northwest Territories, Canada | M3.6 | 149 km | 10 km |
| Nov 14, 1994 | Northwest Territories, Canada | M3.5 | 145 km | 10 km |
| Apr 15, 2001 | Northwest Territories, Canada | M3.4 | 148 km | 5 km |
| Jun 22, 2003 | Northwest Territories, Canada | M3.4 | 150 km | 1 km |
| Jan 27, 2002 | Northwest Territories, Canada | M3.3 | 149 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | -11°F (-24°C) | 0.8 in | Coldest |
| February | -3°F (-20°C) | 0.6 in | |
| March | 10°F (-13°C) | 0.6 in | Driest |
| April | 31°F (-1°C) | 0.7 in | |
| May | 47°F (8°C) | 1.5 in | |
| June | 59°F (15°C) | 2.2 in | |
| July | 62°F (17°C) | 2.7 in | Warmest, Wettest |
| August | 58°F (14°C) | 2.4 in | |
| September | 46°F (8°C) | 1.3 in | |
| October | 30°F (-1°C) | 1.4 in | |
| November | 6°F (-14°C) | 0.9 in | |
| December | -8°F (-22°C) | 0.8 in |
Fort Simpson has a seasonal temperature swing of 74°F / from -11°F in January to 62°F in July. Total annual precipitation is 15.8 inches, with July being the wettest month (2.7") and March the driest (0.6").