Temperature, precipitation, air quality, natural hazards, and monthly weather data.
New Munster experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 20°F in January while summers reach 70°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 35.3 inches. The area receives 37.7 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 787 feet.
Temperature
20°F Jan (-7°C)70°F Jul (21°C)
Annual Average
46.1°F
15% below US avg
January Average
20°F (-7°C)
July Average
70°F (21°C)
Sunny Days
260 days/yr
Geography
Elevation
787 ft (240 m)
Area
1.2 sq mi (3.1 km²)
Population Density
247/sq mi
Coordinates
42.5758°N, 88.2311°W
Timezone
America/Chicago
County
Walworth County County
Nearest Airport
Kenosha Regional (ENW) 16 miles away
Precipitation & Snow
Annual Rainfall35.3"
7% below US avg
Snowfall37.7"
Wettest Month (Jul)4.17"
Driest Month (Feb)1.22"
Air Quality
AQI Median
38.0
Rating
Good
Natural Hazard Risk
Overall Risk
Relatively Low
Risk Score
74.8 / 100
Social Vulnerability
20.8 / 100
Community Resilience
80.3 / 100
Hazard Breakdown
Tornado
Relatively Moderate
Hurricane
Very Low
Earthquake
Very Low
Wildfire
Very Low
Flood
Relatively Moderate
Hail
Relatively High
Strong Wind
Relatively Moderate
Heat Wave
Relatively Low
Winter Weather
Relatively Low
Lightning
Relatively Moderate
Ice Storm
Relatively Low
Drought
Relatively Low
Cold Wave
Relatively Moderate
Landslide
Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
7 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M4.2.
Jun 28, 2004
12 km NW of Dayton, Illinois
M4.2
136 km
10 km
Feb 10, 2010
2 km NW of Lily Lake, Illinois
M3.8
71 km
10 km
Sep 2, 1999
8 km W of Amboy, Illinois
M3.5
137 km
5 km
Nov 4, 2013
1 km SSW of Lyons, Illinois
M3.2
93 km
1 km
Jul 15, 2024
2 km WNW of Somonauk, Illinois
M3.1
111 km
10 km
Mar 25, 2015
3 km WNW of Lake in the Hills, Illinois
M2.9
45 km
6 km
Jun 10, 2013
4 km NNE of Virgil, Illinois
M2.6
69 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
482 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF4. Total: 44 fatalities, 1,352 injuries.
Date
Rating
Distance
Path
Fatalities
Apr 27, 1984
EF4
46 km
6.5 mi
1
Apr 4, 1981
EF4
95 km
1.8 mi
3
Sep 28, 1972
EF4
44 km
5.2 mi
0
Apr 21, 1967
EF4
48 km
8.8 mi
1
Apr 21, 1967
EF4
69 km
25.5 mi
24
Apr 11, 1965
EF4
41 km
9.1 mi
6
Aug 22, 1964
EF4
93 km
2.2 mi
0
Jun 20, 2021
EF3
92 km
17.6 mi
0
Jan 7, 2008
EF3
9 km
10.8 mi
0
Jan 7, 2008
EF3
53 km
13.2 mi
0
Jun 5, 1980
EF3
76 km
10.7 mi
0
Jan 24, 1967
EF3
93 km
24.9 mi
0
Jul 19, 1963
EF3
2 km
10.6 mi
0
Jun 22, 2024
EF2
72 km
6.0 mi
0
Feb 8, 2024
EF2
92 km
25.9 mi
0
Nov 22, 2010
EF2
67 km
18.1 mi
0
Jul 22, 2010
EF2
32 km
1.0 mi
0
Jun 21, 2010
EF2
39 km
5.2 mi
0
Jun 1, 2000
EF2
97 km
17.0 mi
0
Jun 25, 1998
EF2
80 km
2.5 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
148 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
39 km
2024
RX-HWY Y - SOUTH
553
61 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
20°F (-7°C)
1.6 in
Coldest
February
24°F (-5°C)
1.2 in
Driest
March
34°F (1°C)
2.5 in
April
46°F (8°C)
3.5 in
May
57°F (14°C)
3.2 in
June
67°F (19°C)
3.9 in
July
70°F (21°C)
4.2 in
Warmest, Wettest
August
70°F (21°C)
4.0 in
September
62°F (17°C)
3.8 in
October
51°F (10°C)
2.5 in
November
37°F (3°C)
2.6 in
December
25°F (-4°C)
2.1 in
New Munster has a seasonal temperature swing of 51°F / from 20°F in January to 70°F in July. Total annual precipitation is 35.0 inches, with July being the wettest month (4.2") and February the driest (1.2").
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