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 16°F in January while summers reach 70°F in July. Annual precipitation totals 34.5 inches. The area receives 47.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 23 / among the cleanest air in the country. 90% of days have good air quality. The city sits at an elevation of 955 feet.
Temperature
16°F Jan (-9°C)
70°F Jul (21°C)
| Annual Average | 45.3°F |
| 16% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 70°F (21°C) |
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
Air Quality
| AQI Median | 23.0 |
| Rating | Good |
| Good Days % | 89.6% |
| Unhealthy Days | 0 |
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 | 16°F (-9°C) | 1.3 in | Coldest, Driest |
| February | 20°F (-6°C) | 1.3 in | |
| March | 33°F (0°C) | 2.1 in | |
| April | 46°F (8°C) | 3.4 in | |
| May | 58°F (14°C) | 4.0 in | |
| June | 67°F (19°C) | 4.4 in | |
| July | 70°F (21°C) | 3.9 in | Warmest |
| August | 68°F (20°C) | 4.5 in | Wettest |
| September | 60°F (16°C) | 3.4 in | |
| October | 48°F (9°C) | 2.7 in | |
| November | 35°F (2°C) | 1.9 in | |
| December | 23°F (-5°C) | 1.7 in |
Tomah has a seasonal temperature swing of 54°F / from 16°F in January to 70°F in July. Total annual precipitation is 34.5 inches, with August being the wettest month (4.5") and January the driest (1.3").