Weather & Climate in West Perth, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
West Perth has a cool climate with an average annual temperature of 44°F (7°C). Winters average 19°F in January while summers reach 68°F in July. Annual precipitation totals 43.3 inches. The area receives 13.9 inches of snow annually. The city sits at an elevation of 1,119 feet.
Temperature
19°F Jan (-7°C)
68°F Jul (20°C)
| Annual Average | 44.4°F |
| 18% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 1,119 ft (341 m) |
| Area | 223.5 sq mi (578.9 km²) |
| Population Density | 40/sq mi |
| Coordinates | 43.4750°N, 81.2514°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.6.
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 147 km | 4 km |
| May 23, 2022 | 2 km NNW of Corunna, Canada | M2.5 | 116 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1823 | LAKE ERIE | Unknown | 2.7 m | - | 133 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 102 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 3.6 in | Coldest |
| February | 20°F (-7°C) | 3.0 in | |
| March | 29°F (-2°C) | 3.0 in | |
| April | 42°F (5°C) | 3.1 in | |
| May | 54°F (12°C) | 3.4 in | |
| June | 63°F (17°C) | 2.9 in | Driest |
| July | 68°F (20°C) | 3.4 in | Warmest |
| August | 66°F (19°C) | 3.8 in | |
| September | 60°F (15°C) | 4.6 in | Wettest |
| October | 48°F (9°C) | 3.9 in | |
| November | 37°F (3°C) | 4.4 in | |
| December | 26°F (-3°C) | 4.3 in |
West Perth has a seasonal temperature swing of 49°F / from 19°F in January to 68°F in July. Total annual precipitation is 43.3 inches, with September being the wettest month (4.6") and June the driest (2.9").