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Weather & Climate in St. Charles, MI

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

St. Charles experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 23°F in January while summers reach 71°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 34.5 inches. The area receives 38.3 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 601 feet.

Temperature

23°F Jan (-5°C) 71°F Jul (22°C)
Annual Average47.6°F
12% below US avg
January Average23°F (-5°C)
July Average71°F (22°C)
Sunny Days260 days/yr

Geography

Elevation601 ft (183 m)
Area2.2 sq mi (5.7 km²)
Population Density889/sq mi
Coordinates43.2983°N, 84.1476°W
TimezoneAmerica/Detroit
CountySaginaw County County
Nearest AirportMbs International (MBS)
17 miles away

Precipitation & Snow

Annual Rainfall 34.5"
9% below US avg
Snowfall 38.3"
Wettest Month (Sep) 3.90"
Driest Month (Feb) 1.22"

Air Quality

AQI Median38.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score88.6 / 100
Social Vulnerability46.9 / 100
Community Resilience93.2 / 100

Hazard Breakdown

Tornado Relatively High
Hurricane Very Low
Earthquake Relatively Low
Wildfire Very Low
Flood Relatively Moderate
Hail Relatively Moderate
Strong Wind Relatively High
Heat Wave Relatively Low
Winter Weather Very High
Lightning Relatively Low
Ice Storm Relatively Moderate
Drought No Rating
Cold Wave Relatively High
Landslide Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

3 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 67 km 5 km
Jun 30, 2015 5 km NNE of Burlington, Michigan M3.3 148 km 5 km
May 23, 2022 2 km NNW of Corunna, Canada M2.5 145 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

350 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 130 fatalities, 1,150 injuries.

Date Rating Distance Path Fatalities
Jun 8, 1953 EF5 33 km 18.9 mi 116
Apr 21, 1967 EF4 67 km 12.0 mi 0
Apr 11, 1965 EF4 64 km 21.0 mi 1
Jul 4, 1957 EF4 93 km 29.9 mi 0
May 12, 1956 EF4 50 km 6.6 mi 3
Jun 8, 1953 EF4 80 km 33.8 mi 0
Aug 24, 2007 EF3 96 km 6.5 mi 0
Jul 2, 1997 EF3 45 km 1.7 mi 1
Jul 2, 1997 EF3 38 km 2.0 mi 0
Jun 21, 1996 EF3 32 km 1.0 mi 0
Aug 8, 1984 EF3 49 km 0.8 mi 0
Jun 12, 1984 EF3 36 km 48.0 mi 0
Mar 30, 1976 EF3 93 km 11.4 mi 0
Jul 14, 1974 EF3 56 km 1.0 mi 0
May 11, 1974 EF3 98 km 0.9 mi 1
Jun 8, 1953 EF3 88 km 9.1 mi 0
Feb 28, 2024 EF2 57 km 5.7 mi 0
Aug 24, 2023 EF2 73 km 12.0 mi 2
Mar 14, 2019 EF2 52 km 18.2 mi 0
Jun 22, 2015 EF2 33 km 11.3 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 — 143 km
Source: NOAA/NCEI Historical Tsunami Database.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 23°F (-5°C) 1.5 in Coldest
February 24°F (-5°C) 1.2 in Driest
March 33°F (1°C) 2.2 in
April 46°F (8°C) 2.7 in
May 57°F (14°C) 2.7 in
June 66°F (19°C) 3.2 in
July 71°F (22°C) 2.5 in Warmest
August 68°F (20°C) 3.4 in
September 61°F (16°C) 3.9 in Wettest
October 50°F (10°C) 2.4 in
November 38°F (3°C) 2.6 in
December 27°F (-3°C) 2.1 in

St. Charles has a seasonal temperature swing of 48°F / from 23°F in January to 71°F in July. Total annual precipitation is 30.4 inches, with September being the wettest month (3.9") and February the driest (1.2").

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