Weather & Climate in Norwalk, WI

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

Norwalk has a cool climate with an average annual temperature of 45°F (7°C). Winters average 17°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 36.7 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 1,038 feet.

Temperature

17°F Jan (-8°C) 70°F Jul (21°C)

Annual Average	45.0°F
	17% below US avg
January Average	17°F (-8°C)
July Average	70°F (21°C)
Sunny Days	260 days/yr

Geography

Elevation	1,038 ft (316 m)
Area	1.0 sq mi (2.7 km²)
Population Density	594/sq mi
Coordinates	43.8342°N, 90.6269°W
Timezone	America/Chicago
County	Monroe County County
Nearest Airport	La Crosse Regional (LSE) 32 miles away

Precipitation & Snow

Annual Rainfall 36.7"

4% below US avg

Wettest Month (Aug) 4.29"

Driest Month (Feb) 0.91"

Air Quality

AQI Median	38.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	78.9 / 100
Social Vulnerability	75.7 / 100
Community Resilience	65.2 / 100

Hazard Breakdown

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

Source: FEMA National Risk Index v1.20 (Dec 2025)

Tornado History

302 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 8 fatalities, 254 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 19, 1957	EF4	36 km	21.1 mi	1
Aug 7, 2021	EF3	79 km	9.4 mi	0
Aug 27, 1994	EF3	64 km	10.5 mi	2
Aug 29, 1992	EF3	92 km	28.0 mi	1
Jul 3, 1983	EF3	42 km	1.0 mi	0
Jun 5, 1980	EF3	51 km	26.9 mi	0
Sep 3, 1964	EF3	71 km	17.1 mi	0
Aug 16, 1963	EF3	94 km	9.6 mi	0
Aug 16, 1963	EF3	94 km	9.6 mi	0
Aug 16, 1963	EF3	94 km	9.6 mi	0
May 26, 1959	EF3	66 km	34.3 mi	0
Apr 19, 1957	EF3	20 km	9.0 mi	0
Jun 15, 2022	EF2	11 km	22.9 mi	0
Dec 15, 2021	EF2	76 km	2.8 mi	0
Dec 15, 2021	EF2	76 km	3.1 mi	0
Dec 15, 2021	EF2	85 km	1.1 mi	0
Jun 29, 2014	EF2	93 km	29.1 mi	0
Aug 23, 2011	EF2	96 km	7.6 mi	0
May 22, 2011	EF2	68 km	13.8 mi	0
May 22, 2011	EF2	24 km	64.5 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: COTTONVILLE INCIDENT (3,466 acres, 2005).

Year	Name	Acres Burned	Distance
2005	COTTONVILLE INCIDENT	3,466	77 km
1987	BIG BURN	3,154	51 km
2024	2024 DOD HARDWOOD RANGE RX	2,717	63 km
1994	BIG BURN	2,248	51 km
2023	2023 RX	1,992	62 km
1997	BIG BURN	1,642	51 km
2004	POOL ONE NORTH	1,576	46 km
1998	UNNAMED	1,297	52 km
2021	2021 DOD HARDWOOD RANGE RX	987	62 km
2007	UNNAMED	981	43 km
2003	UNNAMED	901	49 km
1998	PR 17	896	46 km
2007	UNNAMED	875	47 km
2009	UNNAMED	867	44 km
2007	PR 16	778	51 km
2006	PR 17 RX FIRE	701	52 km
2018	2018 BADGER RX BURNS	659	87 km
2005	UNNAMED	657	46 km
2003	PR 17	632	52 km
2019	2019 BADGER RX BURNS	627	88 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	17°F (-8°C)	0.9 in	Coldest
February	19°F (-8°C)	0.9 in	Driest
March	30°F (-1°C)	2.0 in
April	44°F (7°C)	3.1 in
May	56°F (14°C)	3.6 in
June	65°F (19°C)	3.9 in
July	70°F (21°C)	4.2 in	Warmest
August	68°F (20°C)	4.3 in	Wettest
September	60°F (16°C)	4.1 in
October	48°F (9°C)	2.4 in
November	34°F (1°C)	2.1 in
December	20°F (-7°C)	1.3 in

Norwalk has a seasonal temperature swing of 53°F / from 17°F in January to 70°F in July. Total annual precipitation is 32.9 inches, with August being the wettest month (4.3") and February the driest (0.9").

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