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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. The area gets 268 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 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) |
| Sunny Days | 268 days/yr |
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").