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Weather & Climate in Stony Plain, AB
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Stony Plain has a cool climate with an average annual temperature of 42°F (6°C). Winters average 20°F in January while summers reach 63°F in July. The area gets 270 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 24.8 inches (drier than the 38-inch national average). The area receives 17.9 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 2,313 feet.
Temperature
20°F Jan (-7°C)
63°F Jul (17°C)
| Annual Average | 41.9°F |
| 22% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 2,313 ft (705 m) |
| Area | 13.7 sq mi (35.5 km²) |
| Population Density | 1,315/sq mi |
| Coordinates | 53.5334°N, 114.0021°W |
| Timezone | America/Edmonton |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| May 19, 1996 | 4 km WNW of Rocky Mountain House, Canada | M4.2 | 144 km | 10 km |
| Mar 10, 2019 | 37 km N of Rocky Mountain House, Canada | M3.9 | 114 km | 10 km |
| Mar 4, 2019 | 9 km NW of Red Deer, Canada | M3.8 | 135 km | 5 km |
| Jun 2, 2015 | 10 km NW of Rocky Mountain House, Canada | M3.5 | 140 km | 1 km |
| Jun 5, 2008 | 45 km WNW of Rocky Mountain House, Canada | M2.9 | 144 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 0.9 in | |
| February | 16°F (-9°C) | 0.6 in | Driest |
| March | 24°F (-4°C) | 0.7 in | |
| April | 39°F (4°C) | 1.1 in | |
| May | 50°F (10°C) | 2.0 in | |
| June | 57°F (14°C) | 3.3 in | |
| July | 63°F (17°C) | 3.8 in | Warmest, Wettest |
| August | 60°F (15°C) | 2.6 in | |
| September | 50°F (10°C) | 1.7 in | |
| October | 41°F (5°C) | 1.0 in | |
| November | 24°F (-4°C) | 0.8 in | |
| December | 14°F (-10°C) | 0.8 in | Coldest |
Stony Plain has a seasonal temperature swing of 49°F / from 14°F in December to 63°F in July. Total annual precipitation is 19.2 inches, with July being the wettest month (3.8") and February the driest (0.6").