Weather & Climate in Tomah, WI

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

Tomah has a cool climate with an average annual temperature of 45°F (7°C). Winters average 15°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 35.6 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 955 feet.

Temperature

15°F Jan (-9°C) 71°F Jul (22°C)

Annual Average	44.6°F
	17% below US avg
January Average	15°F (-9°C)
July Average	71°F (22°C)
Sunny Days	260 days/yr

Geography

Elevation	955 ft (291 m)
Area	7.9 sq mi (20.4 km²)
Population Density	1,208/sq mi
Coordinates	43.9880°N, 90.5014°W
Timezone	America/Chicago
County	Monroe County County
Nearest Airport	La Crosse Regional (LSE) 38 miles away

Precipitation & Snow

Annual Rainfall 35.6"

6% 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

307 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 9 fatalities, 259 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 31, 1977	EF4	94 km	31.8 mi	0
Apr 19, 1957	EF4	29 km	21.1 mi	1
Aug 7, 2021	EF3	97 km	9.4 mi	0
Aug 27, 1994	EF3	48 km	10.5 mi	2
Aug 29, 1992	EF3	79 km	28.0 mi	1
Jul 3, 1983	EF3	24 km	1.0 mi	0
Jun 5, 1980	EF3	68 km	26.9 mi	0
Sep 3, 1964	EF3	88 km	17.1 mi	0
Aug 16, 1963	EF3	99 km	9.6 mi	0
Aug 16, 1963	EF3	99 km	9.6 mi	0
Aug 16, 1963	EF3	99 km	9.6 mi	0
May 26, 1959	EF3	74 km	34.3 mi	0
Apr 19, 1957	EF3	29 km	9.0 mi	0
Jun 15, 2022	EF2	11 km	22.9 mi	0
Dec 15, 2021	EF2	62 km	3.1 mi	0
Dec 15, 2021	EF2	61 km	2.8 mi	0
Dec 15, 2021	EF2	68 km	1.1 mi	0
Aug 23, 2011	EF2	78 km	7.6 mi	0
May 22, 2011	EF2	81 km	13.8 mi	0
May 22, 2011	EF2	8 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	62 km
1987	BIG BURN	3,154	32 km
2024	2024 DOD HARDWOOD RANGE RX	2,717	44 km
1994	BIG BURN	2,248	32 km
2023	2023 RX	1,992	43 km
1997	BIG BURN	1,642	32 km
2004	POOL ONE NORTH	1,576	29 km
1998	UNNAMED	1,297	33 km
2021	2021 DOD HARDWOOD RANGE RX	987	43 km
2007	UNNAMED	981	26 km
2003	UNNAMED	901	30 km
1998	PR 17	896	29 km
2007	UNNAMED	875	30 km
2009	UNNAMED	867	27 km
2007	PR 16	778	32 km
2006	PR 17 RX FIRE	701	34 km
2018	2018 BADGER RX BURNS	659	91 km
2005	UNNAMED	657	28 km
2003	PR 17	632	33 km
2019	2019 BADGER RX BURNS	627	92 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	15°F (-9°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	71°F (22°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

Tomah has a seasonal temperature swing of 56°F / from 15°F in January to 71°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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