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Weather & Climate in Cassville, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cassville experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 17°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 38.5 inches. The area receives 37.4 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 633 feet.
Temperature
17°F Jan (-8°C)
71°F Jul (22°C)
| Annual Average | 46.3°F |
| 14% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 633 ft (193 m) |
| Area | 1.0 sq mi (2.7 km²) |
| Population Density | 666/sq mi |
| Coordinates | 42.7152°N, 90.9891°W |
| Timezone | America/Chicago |
| County | Dubuque County County |
| Nearest Airport | Dubuque Regional (DBQ) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 63.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 97.0 / 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 Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
491 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 18 fatalities, 496 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF5 | 87 km | 36.0 mi | 9 |
| May 15, 1968 | EF5 | 77 km | 13.1 mi | 5 |
| Mar 13, 1990 | EF4 | 65 km | 19.0 mi | 0 |
| Jul 3, 1983 | EF4 | 76 km | 0.5 mi | 0 |
| Aug 12, 1974 | EF4 | 57 km | 5.0 mi | 0 |
| Apr 11, 1965 | EF4 | 96 km | 91.5 mi | 1 |
| Apr 30, 1954 | EF4 | 93 km | 80.4 mi | 0 |
| Aug 7, 2021 | EF3 | 51 km | 9.4 mi | 0 |
| May 25, 2008 | EF3 | 85 km | 32.0 mi | 0 |
| Jul 27, 1995 | EF3 | 58 km | 20.0 mi | 0 |
| Jun 19, 1993 | EF3 | 49 km | 14.0 mi | 0 |
| Jun 19, 1993 | EF3 | 55 km | 9.0 mi | 0 |
| Jul 13, 1992 | EF3 | 61 km | 5.0 mi | 0 |
| May 8, 1988 | EF3 | 64 km | 16.0 mi | 0 |
| May 30, 1985 | EF3 | 47 km | 34.0 mi | 2 |
| Jul 12, 1971 | EF3 | 63 km | 0.1 mi | 0 |
| Jun 24, 1971 | EF3 | 78 km | 0.1 mi | 1 |
| Sep 9, 1970 | EF3 | 35 km | 4.7 mi | 0 |
| Apr 16, 1967 | EF3 | 89 km | 27.8 mi | 0 |
| Sep 3, 1964 | EF3 | 61 km | 17.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 0.9 in | Coldest, Driest |
| February | 23°F (-5°C) | 1.1 in | |
| March | 35°F (1°C) | 2.1 in | |
| April | 48°F (9°C) | 3.2 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 69°F (20°C) | 4.3 in | Wettest |
| July | 71°F (22°C) | 4.0 in | Warmest |
| August | 71°F (21°C) | 4.3 in | |
| September | 62°F (17°C) | 3.5 in | |
| October | 51°F (10°C) | 2.4 in | |
| November | 36°F (2°C) | 2.3 in | |
| December | 23°F (-5°C) | 1.4 in |
Cassville has a seasonal temperature swing of 54°F / from 17°F in January to 71°F in July. Total annual precipitation is 33.2 inches, with June being the wettest month (4.3") and January the driest (0.9").