Weather & Climate in St. Joseph, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Joseph experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 69°F in July. Annual precipitation totals 37.6 inches. The area receives 11.5 inches of snow annually. The city sits at an elevation of 643 feet.
Temperature
24°F Jan (-5°C)
69°F Jul (21°C)
| Annual Average | 46.5°F |
| 14% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 69°F (21°C) |
Geography
| Elevation | 643 ft (196 m) |
| Area | 49.3 sq mi (127.7 km²) |
| Population Density | 29/sq mi |
| Coordinates | 43.4132°N, 81.7061°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.5.
| May 23, 2022 | 2 km NNW of Corunna, Canada | M2.5 | 83 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 | - | 138 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 66 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 3.1 in | Coldest |
| February | 24°F (-5°C) | 2.4 in | |
| March | 31°F (-1°C) | 2.4 in | Driest |
| April | 41°F (5°C) | 2.9 in | |
| May | 53°F (12°C) | 3.0 in | |
| June | 63°F (17°C) | 2.9 in | |
| July | 69°F (21°C) | 3.1 in | Warmest |
| August | 68°F (20°C) | 3.2 in | |
| September | 62°F (17°C) | 4.0 in | Wettest |
| October | 52°F (11°C) | 3.4 in | |
| November | 41°F (5°C) | 3.7 in | |
| December | 31°F (-1°C) | 3.6 in |
St. Joseph has a seasonal temperature swing of 45°F / from 24°F in January to 69°F in July. Total annual precipitation is 37.6 inches, with September being the wettest month (4.0") and March the driest (2.4").