Weather & Climate in Elm Grove, WI

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

Elm Grove experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 22°F in January while summers reach 73°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 33.8 inches. The area receives 39.5 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 794 feet.

Temperature

22°F Jan (-6°C) 73°F Jul (23°C)

Annual Average	48.3°F
	11% below US avg
January Average	22°F (-6°C)
July Average	73°F (23°C)
Sunny Days	260 days/yr

Geography

Elevation	794 ft (242 m)
Area	3.3 sq mi (8.5 km²)
Population Density	1,972/sq mi
Coordinates	43.0475°N, 88.0870°W
Timezone	America/Chicago
County	Waukesha County County
Nearest Airport	General Mitchell International (MKE) 12 miles away

Precipitation & Snow

Annual Rainfall 33.8"

11% below US avg

Snowfall 39.5"

Wettest Month (Aug) 3.86"

Driest Month (Feb) 1.14"

Air Quality

AQI Median	38.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	88.9 / 100
Social Vulnerability	10.6 / 100
Community Resilience	97.4 / 100

Hazard Breakdown

Tornado	Relatively High
Hurricane	Very Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Relatively Moderate
Hail	Relatively High
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Relatively High
Lightning	Relatively Moderate
Ice Storm	Relatively Moderate
Drought	Relatively Low
Cold Wave	Relatively High
Landslide	Relatively 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: M3.8.

Feb 10, 2010	2 km NW of Lily Lake, Illinois	M3.8	125 km	10 km
Nov 4, 2013	1 km SSW of Lyons, Illinois	M3.2	140 km	1 km
Mar 25, 2015	3 km WNW of Lake in the Hills, Illinois	M2.9	98 km	6 km
Jun 10, 2013	4 km NNE of Virgil, Illinois	M2.6	123 km	5 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

374 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 16 fatalities, 560 injuries.

Date	Rating	Distance	Path	Fatalities
Jul 18, 1996	EF5	84 km	13.3 mi	0
Apr 27, 1984	EF4	24 km	6.5 mi	1
Apr 4, 1981	EF4	44 km	1.8 mi	3
Apr 21, 1974	EF4	99 km	26.0 mi	0
Sep 28, 1972	EF4	87 km	5.2 mi	0
Apr 11, 1965	EF4	95 km	9.1 mi	6
Aug 22, 1964	EF4	39 km	2.2 mi	0
Jan 7, 2008	EF3	95 km	13.2 mi	0
Jan 7, 2008	EF3	59 km	10.8 mi	0
Jun 23, 2004	EF3	98 km	7.6 mi	1
Jun 5, 1980	EF3	56 km	10.7 mi	0
Apr 7, 1980	EF3	86 km	1.2 mi	0
Jun 4, 1975	EF3	95 km	2.3 mi	0
Apr 21, 1974	EF3	78 km	22.2 mi	0
Apr 21, 1974	EF3	74 km	58.6 mi	2
Jul 19, 1963	EF3	54 km	10.6 mi	0
Jun 22, 2024	EF2	96 km	6.0 mi	0
Aug 28, 2018	EF2	72 km	3.9 mi	0
Jul 22, 2010	EF2	22 km	1.0 mi	0
Jun 21, 2010	EF2	39 km	5.2 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

8 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (1,524 acres, 2006).

Year	Name	Acres Burned	Distance
2006	UNNAMED	1,524	68 km
2010	RX BURN	1,236	68 km
1994	SOMMERS	938	75 km
1988	PEACHY RD	812	72 km
2024	IBSP SOUTH F1 RX	690	75 km
2006	UNNAMED	612	77 km
2007	TOWER RD 2	592	72 km
2024	RX-HWY Y - SOUTH	553	54 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	22°F (-6°C)	1.4 in	Coldest
February	24°F (-5°C)	1.1 in	Driest
March	34°F (1°C)	2.1 in
April	45°F (7°C)	3.2 in
May	57°F (14°C)	2.9 in
June	66°F (19°C)	3.6 in
July	73°F (23°C)	3.7 in	Warmest
August	70°F (21°C)	3.9 in	Wettest
September	62°F (17°C)	3.8 in
October	50°F (10°C)	2.4 in
November	37°F (3°C)	2.4 in
December	25°F (-4°C)	1.9 in

Elm Grove has a seasonal temperature swing of 51°F / from 22°F in January to 73°F in July. Total annual precipitation is 32.4 inches, with August being the wettest month (3.9") and February the driest (1.1").

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