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Weather & Climate in Wilton, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wilton experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 17°F in January while summers reach 72°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 35.0 inches. The area receives 54.5 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 999 feet.
Temperature
17°F Jan (-8°C)
72°F Jul (22°C)
| Annual Average | 46.2°F |
| 14% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 999 ft (304 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 601/sq mi |
| Coordinates | 43.8133°N, 90.5269°W |
| Timezone | America/Chicago |
| County | Monroe County County |
| Nearest Airport | La Crosse Regional (LSE) 37 miles away |
Precipitation & Snow
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
312 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 8 fatalities, 252 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 3, 1983 | EF4 | 99 km | 0.5 mi | 0 |
| Apr 19, 1957 | EF4 | 29 km | 21.1 mi | 1 |
| Aug 7, 2021 | EF3 | 78 km | 9.4 mi | 0 |
| Aug 27, 1994 | EF3 | 58 km | 10.5 mi | 2 |
| Aug 29, 1992 | EF3 | 86 km | 28.0 mi | 1 |
| Jul 3, 1983 | EF3 | 38 km | 1.0 mi | 0 |
| Jun 5, 1980 | EF3 | 58 km | 26.9 mi | 0 |
| Sep 3, 1964 | EF3 | 69 km | 17.1 mi | 0 |
| Aug 16, 1963 | EF3 | 87 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 87 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 87 km | 9.6 mi | 0 |
| May 26, 1959 | EF3 | 75 km | 34.3 mi | 0 |
| Apr 19, 1957 | EF3 | 12 km | 9.0 mi | 0 |
| Jun 15, 2022 | EF2 | 9 km | 22.9 mi | 0 |
| Dec 15, 2021 | EF2 | 80 km | 3.1 mi | 0 |
| Dec 15, 2021 | EF2 | 80 km | 2.8 mi | 0 |
| Dec 15, 2021 | EF2 | 87 km | 1.1 mi | 0 |
| Jun 29, 2014 | EF2 | 90 km | 29.1 mi | 0 |
| Jun 29, 2014 | EF2 | 97 km | 5.1 mi | 0 |
| Aug 23, 2011 | EF2 | 97 km | 7.6 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 | 71 km |
| 1987 | BIG BURN | 3,154 | 48 km |
| 2024 | 2024 DOD HARDWOOD RANGE RX | 2,717 | 59 km |
| 1994 | BIG BURN | 2,248 | 48 km |
| 2023 | 2023 RX | 1,992 | 59 km |
| 1997 | BIG BURN | 1,642 | 48 km |
| 2004 | POOL ONE NORTH | 1,576 | 41 km |
| 1998 | UNNAMED | 1,297 | 48 km |
| 2021 | 2021 DOD HARDWOOD RANGE RX | 987 | 58 km |
| 2007 | UNNAMED | 981 | 39 km |
| 2003 | UNNAMED | 901 | 46 km |
| 1998 | PR 17 | 896 | 41 km |
| 2007 | UNNAMED | 875 | 42 km |
| 2009 | UNNAMED | 867 | 40 km |
| 2007 | PR 16 | 778 | 47 km |
| 2006 | PR 17 RX FIRE | 701 | 49 km |
| 2018 | 2018 BADGER RX BURNS | 659 | 79 km |
| 2005 | UNNAMED | 657 | 42 km |
| 2003 | PR 17 | 632 | 48 km |
| 2019 | 2019 BADGER RX BURNS | 627 | 80 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 0.9 in | Coldest, Driest |
| February | 19°F (-7°C) | 0.9 in | |
| March | 31°F (-1°C) | 1.9 in | |
| April | 44°F (7°C) | 3.2 in | |
| May | 57°F (14°C) | 3.5 in | |
| June | 66°F (19°C) | 3.9 in | |
| July | 72°F (22°C) | 4.1 in | Warmest |
| August | 68°F (20°C) | 4.3 in | Wettest |
| September | 60°F (16°C) | 4.1 in | |
| October | 49°F (9°C) | 2.3 in | |
| November | 34°F (1°C) | 2.1 in | |
| December | 20°F (-6°C) | 1.3 in |
Wilton has a seasonal temperature swing of 54°F / from 17°F in January to 72°F in July. Total annual precipitation is 32.5 inches, with August being the wettest month (4.3") and January the driest (0.9").