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Weather & Climate in Vassar, MI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Vassar experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 21°F in January while summers reach 69°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 34.2 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 637 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 46.3°F |
| 14% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 637 ft (194 m) |
| Area | 2.2 sq mi (5.6 km²) |
| Population Density | 1,258/sq mi |
| Coordinates | 43.3708°N, 83.5775°W |
| Timezone | America/Detroit |
| County | Tuscola County County |
| Nearest Airport | Bishop International (FNT) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 73.1 / 100 |
| Social Vulnerability | 59.3 / 100 |
| Community Resilience | 80.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Sep 2, 1994 | 5 km SSW of DeWitt, Michigan | M3.5 | 105 km | 5 km |
| Apr 20, 2018 | Michigan | M3.4 | 147 km | 3 km |
| Mar 8, 2010 | 7 km ENE of Grosse Ile, Michigan | M2.5 | 141 km | 18 km |
| May 23, 2022 | 2 km NNW of Corunna, Canada | M2.5 | 106 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
319 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 142 fatalities, 1,474 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 8, 1953 | EF5 | 37 km | 18.9 mi | 116 |
| Mar 20, 1976 | EF4 | 96 km | 3.8 mi | 1 |
| May 8, 1964 | EF4 | 99 km | 3.3 mi | 11 |
| Jul 4, 1957 | EF4 | 95 km | 29.9 mi | 0 |
| May 12, 1956 | EF4 | 42 km | 6.6 mi | 3 |
| Jun 8, 1953 | EF4 | 41 km | 33.8 mi | 0 |
| May 21, 1953 | EF4 | 94 km | 10.0 mi | 2 |
| Jul 2, 1997 | EF3 | 22 km | 1.7 mi | 1 |
| Jul 2, 1997 | EF3 | 25 km | 2.0 mi | 0 |
| Jun 21, 1996 | EF3 | 15 km | 1.0 mi | 0 |
| Sep 14, 1990 | EF3 | 99 km | 24.0 mi | 0 |
| Sep 2, 1984 | EF3 | 67 km | 15.6 mi | 0 |
| Aug 8, 1984 | EF3 | 42 km | 0.8 mi | 0 |
| Jun 12, 1984 | EF3 | 37 km | 48.0 mi | 0 |
| Mar 30, 1976 | EF3 | 99 km | 11.4 mi | 0 |
| Mar 20, 1976 | EF3 | 90 km | 17.1 mi | 1 |
| Jul 14, 1974 | EF3 | 36 km | 1.0 mi | 0 |
| Aug 2, 1972 | EF3 | 94 km | 0.1 mi | 0 |
| Jun 8, 1953 | EF3 | 89 km | 9.1 mi | 0 |
| Feb 28, 2024 | EF2 | 51 km | 5.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 1.5 m (5 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | — | 100 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 1.4 in | Coldest |
| February | 23°F (-5°C) | 1.2 in | Driest |
| March | 33°F (0°C) | 2.1 in | |
| April | 44°F (7°C) | 2.6 in | |
| May | 57°F (14°C) | 2.8 in | |
| June | 66°F (19°C) | 3.2 in | |
| July | 69°F (21°C) | 2.6 in | Warmest |
| August | 68°F (20°C) | 3.2 in | |
| September | 61°F (16°C) | 4.0 in | Wettest |
| October | 50°F (10°C) | 2.4 in | |
| November | 38°F (4°C) | 2.6 in | |
| December | 27°F (-3°C) | 2.0 in |
Vassar has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 29.9 inches, with September being the wettest month (4.0") and February the driest (1.2").