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Weather & Climate in Hazel Green, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hazel Green experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 18°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 40.0 inches. The area receives 42.8 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 950 feet.
Temperature
18°F Jan (-8°C)
72°F Jul (22°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 950 ft (290 m) |
| Area | 1.3 sq mi (3.3 km²) |
| Population Density | 843/sq mi |
| Coordinates | 42.5342°N, 90.4361°W |
| Timezone | America/Chicago |
| County | Jo Daviess County County |
| Nearest Airport | Dubuque Regional (DBQ) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 51.3 / 100 |
| Social Vulnerability | 48.8 / 100 |
| Community Resilience | 59.5 / 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 | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Sep 2, 1999 | 8 km W of Amboy, Illinois | M3.5 | 123 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
497 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 17 fatalities, 459 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF5 | 61 km | 36.0 mi | 9 |
| Mar 13, 1990 | EF4 | 88 km | 19.0 mi | 0 |
| Jul 3, 1983 | EF4 | 55 km | 0.5 mi | 0 |
| Aug 12, 1974 | EF4 | 88 km | 5.0 mi | 0 |
| Apr 11, 1965 | EF4 | 86 km | 91.5 mi | 1 |
| Aug 7, 2021 | EF3 | 70 km | 9.4 mi | 0 |
| Jun 16, 2014 | EF3 | 89 km | 1.0 mi | 0 |
| Aug 18, 2005 | EF3 | 93 km | 18.6 mi | 1 |
| Jun 19, 1993 | EF3 | 91 km | 9.0 mi | 0 |
| Jun 19, 1993 | EF3 | 33 km | 14.0 mi | 0 |
| Jul 13, 1992 | EF3 | 69 km | 5.0 mi | 0 |
| Jun 17, 1992 | EF3 | 83 km | 16.0 mi | 0 |
| May 8, 1988 | EF3 | 18 km | 16.0 mi | 0 |
| May 8, 1988 | EF3 | 92 km | 32.0 mi | 0 |
| May 30, 1985 | EF3 | 96 km | 34.0 mi | 2 |
| Aug 5, 1979 | EF3 | 91 km | 5.7 mi | 0 |
| Jun 20, 1974 | EF3 | 63 km | 10.6 mi | 1 |
| Jul 12, 1971 | EF3 | 93 km | 0.1 mi | 0 |
| Sep 9, 1970 | EF3 | 20 km | 4.7 mi | 0 |
| Apr 16, 1967 | EF3 | 42 km | 27.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: COLD SPRINGS (552 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | COLD SPRINGS | 552 | 68 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 1.1 in | Coldest, Driest |
| February | 23°F (-5°C) | 1.1 in | |
| March | 34°F (1°C) | 2.3 in | |
| April | 47°F (8°C) | 3.3 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 68°F (20°C) | 4.4 in | Wettest |
| July | 72°F (22°C) | 4.0 in | Warmest |
| August | 70°F (21°C) | 4.2 in | |
| September | 62°F (17°C) | 3.9 in | |
| October | 50°F (10°C) | 2.5 in | |
| November | 36°F (2°C) | 2.3 in | |
| December | 23°F (-5°C) | 1.6 in |
Hazel Green has a seasonal temperature swing of 54°F / from 18°F in January to 72°F in July. Total annual precipitation is 34.4 inches, with June being the wettest month (4.4") and January the driest (1.1").