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Weather & Climate in Forty Mile County No. 8, AB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Forty Mile County No. 8 has a cool climate with an average annual temperature of 41°F (5°C). Winters average 12°F in January while summers reach 66°F in July. The area gets 311 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 13.8 inches (drier than the 38-inch national average). The area receives 3.6 inches of snow annually. The city sits at an elevation of 2,943 feet.
Temperature
12°F Jan (-11°C)
66°F Jul (19°C)
| Annual Average | 40.5°F |
| 25% below US avg | |
| January Average | 12°F (-11°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 2,943 ft (897 m) |
| Area | 2,765.9 sq mi (7,163.6 km²) |
| Population Density | 1/sq mi |
| Coordinates | 49.4531°N, 110.8102°W |
| Timezone | America/Edmonton |
Precipitation & Snow
Air Quality
Earthquake History
19 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Aug 16, 1994 | 27 km W of Chester, Montana | M3.9 | 114 km | 5 km |
| May 1, 1997 | 35 km SSE of Magrath, Canada | M3.8 | 138 km | 5 km |
| Sep 29, 2009 | 42 km NW of Santa Rita, Montana | M3.6 | 142 km | 21 km |
| Jun 5, 1991 | 18 km SW of Shelby, Montana | M3.6 | 149 km | 5 km |
| Jan 3, 2008 | 13 km SSE of Magrath, Canada | M3.5 | 144 km | 38 km |
| Sep 7, 2014 | 36 km SSE of Magrath, Canada | M3.4 | 139 km | 15 km |
| Nov 17, 1992 | 39 km NNW of Santa Rita, Montana | M3.4 | 140 km | 5 km |
| Aug 15, 1996 | 33 km WNW of Sweet Grass, Montana | M3.4 | 123 km | 5 km |
| Jan 22, 1993 | 33 km SSE of Raymond, Canada | M3.4 | 119 km | 5 km |
| Jan 1, 1993 | 20 km WSW of Sweet Grass, Montana | M3.4 | 118 km | 5 km |
| Nov 6, 2002 | 3 km SSE of Little Browning, Montana | M3.4 | 146 km | 1 km |
| Mar 5, 1995 | 2 km NW of Cut Bank, Montana | M3.3 | 143 km | 10 km |
| Jan 11, 2003 | 44 km SSE of Magrath, Canada | M3.2 | 143 km | 10 km |
| Apr 4, 1990 | 4 km WNW of Santa Rita, Montana | M3.1 | 140 km | 6 km |
| Jun 9, 2009 | 20 km NNW of Santa Rita, Montana | M3.0 | 135 km | 23 km |
| Apr 10, 2024 | 17 km NNW of Santa Rita, Montana | M2.7 | 137 km | 10 km |
| Mar 29, 2008 | 4 km SSE of Little Browning, Montana | M2.6 | 146 km | 3 km |
| Mar 29, 2008 | 3 km SSE of Cut Bank, Montana | M2.5 | 145 km | 3 km |
| Feb 25, 2013 | 28 km WSW of Chester, Montana | M2.5 | 125 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 12°F (-11°C) | 0.8 in | Coldest |
| February | 18°F (-8°C) | 0.6 in | Driest |
| March | 29°F (-2°C) | 0.9 in | |
| April | 42°F (5°C) | 1.0 in | |
| May | 52°F (11°C) | 1.9 in | |
| June | 60°F (16°C) | 2.5 in | Wettest |
| July | 66°F (19°C) | 1.4 in | Warmest |
| August | 65°F (19°C) | 1.4 in | |
| September | 55°F (13°C) | 1.4 in | |
| October | 44°F (7°C) | 0.6 in | |
| November | 27°F (-3°C) | 0.6 in | |
| December | 17°F (-9°C) | 0.8 in |
Forty Mile County No. 8 has a seasonal temperature swing of 54°F / from 12°F in January to 66°F in July. Total annual precipitation is 13.8 inches, with June being the wettest month (2.5") and February the driest (0.6").