Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mount Pleasant experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 23°F in January while summers reach 72°F in July. Annual precipitation totals 31.8 inches. The area receives 41.0 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 42. 76% of days have good air quality. The city sits at an elevation of 678 feet.
Temperature
23°F Jan (-5°C)72°F Jul (22°C)
Annual Average
48.4°F
10% below US avg
January Average
23°F (-5°C)
July Average
72°F (22°C)
Geography
Elevation
678 ft (207 m)
Area
35.3 sq mi (91.4 km²)
Population Density
817/sq mi
Coordinates
42.7088°N, 87.8849°W
Timezone
America/Chicago
County
Racine County County
Nearest Airport
Batten International (RAC) 5 miles away
Precipitation & Snow
Annual Rainfall31.8"
16% below US avg
Snowfall41.0"
Wettest Month (Jun)3.99"
Driest Month (Feb)1.10"
Air Quality
AQI Median
42.0
Rating
Good
Good Days %
76.1%
Unhealthy Days
11
Natural Hazard Risk
Overall Risk
Relatively Moderate
Risk Score
85.4 / 100
Social Vulnerability
26.8 / 100
Community Resilience
98.8 / 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 Moderate
Winter Weather
Relatively Moderate
Lightning
Relatively High
Ice Storm
Relatively Low
Drought
Relatively Low
Cold Wave
Relatively High
Landslide
Very Low
Coastal Flood
Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M3.8.
Feb 10, 2010
2 km NW of Lily Lake, Illinois
M3.8
97 km
10 km
Nov 4, 2013
1 km SSW of Lyons, Illinois
M3.2
101 km
1 km
Jul 15, 2024
2 km WNW of Somonauk, Illinois
M3.1
136 km
10 km
Mar 25, 2015
3 km WNW of Lake in the Hills, Illinois
M2.9
70 km
6 km
Jun 10, 2013
4 km NNE of Virgil, Illinois
M2.6
95 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
360 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF4. Total: 18 fatalities, 841 injuries.
Date
Rating
Distance
Path
Fatalities
Apr 27, 1984
EF4
50 km
6.5 mi
1
Apr 4, 1981
EF4
84 km
1.8 mi
3
Sep 28, 1972
EF4
48 km
5.2 mi
0
Apr 21, 1967
EF4
70 km
8.8 mi
1
Apr 11, 1965
EF4
68 km
9.1 mi
6
Aug 22, 1964
EF4
75 km
2.2 mi
0
Jan 7, 2008
EF3
85 km
13.2 mi
0
Jan 7, 2008
EF3
41 km
10.8 mi
0
Jun 5, 1980
EF3
86 km
10.7 mi
0
Jul 19, 1963
EF3
33 km
10.6 mi
0
Nov 22, 2010
EF2
98 km
18.1 mi
0
Jul 22, 2010
EF2
31 km
1.0 mi
0
Jun 21, 2010
EF2
54 km
5.2 mi
0
Jun 1, 2000
EF2
98 km
17.0 mi
0
May 18, 1997
EF2
35 km
6.0 mi
0
Apr 19, 1996
EF2
29 km
2.0 mi
0
Sep 28, 1986
EF2
71 km
9.0 mi
0
Jun 15, 1981
EF2
87 km
28.7 mi
0
Aug 4, 1980
EF2
52 km
0.1 mi
0
Jul 16, 1980
EF2
84 km
1.4 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
Highest wave on record: 3.0 m (10 ft).
Year
Location
Cause
Max Wave
Deaths
Distance
1954
MICHIGAN CITY, IN (LAKE MICHIGAN)
Avalanche
3.0 m
7
139 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
2 wildfires (100+ acres) recorded within 100 km.
Largest: IBSP SOUTH F1 RX (690 acres, 2024).
Year
Name
Acres Burned
Distance
2024
IBSP SOUTH F1 RX
690
34 km
2024
RX-HWY Y - SOUTH
553
76 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
23°F (-5°C)
1.3 in
Coldest
February
26°F (-3°C)
1.1 in
Driest
March
35°F (2°C)
2.1 in
April
45°F (7°C)
3.7 in
May
56°F (13°C)
3.5 in
June
66°F (19°C)
4.0 in
Wettest
July
72°F (22°C)
2.9 in
Warmest
August
71°F (22°C)
3.4 in
September
64°F (18°C)
3.2 in
October
52°F (11°C)
2.9 in
November
40°F (4°C)
2.2 in
December
29°F (-2°C)
1.6 in
Mount Pleasant has a seasonal temperature swing of 49°F / from 23°F in January to 72°F in July. Total annual precipitation is 31.8 inches, with June being the wettest month (4.0") and February the driest (1.1").