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Weather & Climate in Viola, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Viola has a cool climate with an average annual temperature of 44°F (7°C). Winters average 15°F in January while summers reach 69°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 38.0 inches. The area receives 47.2 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 760 feet.
Temperature
15°F Jan (-10°C)
69°F Jul (21°C)
| Annual Average | 43.7°F |
| 19% below US avg | |
| January Average | 15°F (-10°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 760 ft (232 m) |
| Area | 1.0 sq mi (2.6 km²) |
| Population Density | 592/sq mi |
| Coordinates | 43.5082°N, 90.6740°W |
| Timezone | America/Chicago |
| County | Vernon County County |
| Nearest Airport | Tri-County Regional (LNR) 32 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 75.0 / 100 |
| Social Vulnerability | 79.4 / 100 |
| Community Resilience | 65.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
337 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 14 fatalities, 388 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF5 | 82 km | 36.0 mi | 9 |
| Jul 3, 1983 | EF4 | 74 km | 0.5 mi | 0 |
| Apr 19, 1957 | EF4 | 57 km | 21.1 mi | 1 |
| Aug 7, 2021 | EF3 | 42 km | 9.4 mi | 0 |
| Aug 27, 1994 | EF3 | 89 km | 10.5 mi | 2 |
| Jul 3, 1983 | EF3 | 73 km | 1.0 mi | 0 |
| Jun 5, 1980 | EF3 | 48 km | 26.9 mi | 0 |
| Sep 3, 1964 | EF3 | 35 km | 17.1 mi | 0 |
| Aug 16, 1963 | EF3 | 81 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 81 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 81 km | 9.6 mi | 0 |
| May 26, 1959 | EF3 | 81 km | 34.3 mi | 0 |
| Apr 19, 1957 | EF3 | 32 km | 9.0 mi | 0 |
| May 10, 1953 | EF3 | 82 km | 6.6 mi | 0 |
| Jun 15, 2022 | EF2 | 45 km | 22.9 mi | 0 |
| Jun 29, 2014 | EF2 | 59 km | 29.1 mi | 0 |
| Jun 29, 2014 | EF2 | 70 km | 5.1 mi | 0 |
| Jun 16, 2014 | EF2 | 87 km | 3.8 mi | 0 |
| Sep 4, 2012 | EF2 | 72 km | 0.7 mi | 0 |
| May 22, 2011 | EF2 | 60 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 | 100 km |
| 1987 | BIG BURN | 3,154 | 83 km |
| 2024 | 2024 DOD HARDWOOD RANGE RX | 2,717 | 94 km |
| 1994 | BIG BURN | 2,248 | 83 km |
| 2023 | 2023 RX | 1,992 | 94 km |
| 1997 | BIG BURN | 1,642 | 83 km |
| 2004 | POOL ONE NORTH | 1,576 | 75 km |
| 1998 | UNNAMED | 1,297 | 83 km |
| 2021 | 2021 DOD HARDWOOD RANGE RX | 987 | 93 km |
| 2007 | UNNAMED | 981 | 73 km |
| 2003 | UNNAMED | 901 | 82 km |
| 1998 | PR 17 | 896 | 75 km |
| 2007 | UNNAMED | 875 | 76 km |
| 2009 | UNNAMED | 867 | 74 km |
| 2007 | PR 16 | 778 | 83 km |
| 2006 | PR 17 RX FIRE | 701 | 84 km |
| 2018 | 2018 BADGER RX BURNS | 659 | 76 km |
| 2005 | UNNAMED | 657 | 77 km |
| 2003 | PR 17 | 632 | 83 km |
| 2019 | 2019 BADGER RX BURNS | 627 | 77 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-10°C) | 0.9 in | Coldest |
| February | 20°F (-7°C) | 0.9 in | Driest |
| March | 31°F (-0°C) | 1.8 in | |
| April | 45°F (7°C) | 3.4 in | |
| May | 57°F (14°C) | 3.6 in | |
| June | 66°F (19°C) | 3.9 in | |
| July | 69°F (21°C) | 4.3 in | Warmest, Wettest |
| August | 69°F (20°C) | 4.3 in | |
| September | 61°F (16°C) | 3.9 in | |
| October | 49°F (9°C) | 2.3 in | |
| November | 34°F (1°C) | 2.1 in | |
| December | 21°F (-6°C) | 1.2 in |
Viola has a seasonal temperature swing of 55°F / from 15°F in January to 69°F in July. Total annual precipitation is 32.4 inches, with July being the wettest month (4.3") and February the driest (0.9").