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Weather & Climate in Spring Green, WI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Spring Green experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 19°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 34.1 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 725 feet.
Temperature
19°F Jan (-7°C)
72°F Jul (22°C)
| Annual Average | 47.3°F |
| 12% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 725 ft (221 m) |
| Area | 1.8 sq mi (4.7 km²) |
| Population Density | 898/sq mi |
| Coordinates | 43.1776°N, 90.0688°W |
| Timezone | America/Chicago |
| County | Iowa County County |
| Nearest Airport | Tri-County Regional (LNR) 6 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 23.4 / 100 |
| Social Vulnerability | 12.2 / 100 |
| Community Resilience | 93.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
468 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 21 fatalities, 534 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF5 | 24 km | 36.0 mi | 9 |
| Jul 3, 1983 | EF4 | 24 km | 0.5 mi | 0 |
| Apr 19, 1957 | EF4 | 78 km | 21.1 mi | 1 |
| Sep 26, 1951 | EF4 | 74 km | 9.0 mi | 1 |
| Aug 7, 2021 | EF3 | 53 km | 9.4 mi | 0 |
| Jun 16, 2014 | EF3 | 46 km | 1.0 mi | 0 |
| Aug 18, 2005 | EF3 | 59 km | 18.6 mi | 1 |
| Jun 17, 1992 | EF3 | 55 km | 16.0 mi | 0 |
| May 8, 1988 | EF3 | 68 km | 16.0 mi | 0 |
| Jun 8, 1984 | EF3 | 74 km | 29.0 mi | 0 |
| Apr 7, 1980 | EF3 | 95 km | 1.2 mi | 0 |
| Jun 4, 1975 | EF3 | 68 km | 2.3 mi | 0 |
| Sep 9, 1970 | EF3 | 90 km | 4.7 mi | 0 |
| Aug 2, 1967 | EF3 | 51 km | 0.1 mi | 2 |
| Apr 16, 1967 | EF3 | 74 km | 27.8 mi | 0 |
| Jan 24, 1967 | EF3 | 86 km | 24.9 mi | 0 |
| Sep 3, 1964 | EF3 | 46 km | 17.1 mi | 0 |
| Aug 16, 1963 | EF3 | 31 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 31 km | 9.6 mi | 0 |
| Aug 16, 1963 | EF3 | 31 km | 9.6 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
11 wildfires (100+ acres) recorded within 100 km. Largest: POOL ONE NORTH (1,576 acres, 2004).
| Year | Name | Acres Burned | Distance |
| 2004 | POOL ONE NORTH | 1,576 | 99 km |
| 2007 | UNNAMED | 981 | 100 km |
| 1998 | PR 17 | 896 | 100 km |
| 2007 | UNNAMED | 875 | 99 km |
| 2018 | 2018 BADGER RX BURNS | 659 | 34 km |
| 2019 | 2019 BADGER RX BURNS | 627 | 34 km |
| 2003 | UNNAMED | 580 | 100 km |
| 2008 | UNNAMED | 569 | 99 km |
| 1987 | UNNAMED | 560 | 99 km |
| 2009 | COLD SPRINGS | 552 | 67 km |
| 2007 | UNNAMED | 539 | 99 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.1 in | Coldest |
| February | 21°F (-6°C) | 1.0 in | Driest |
| March | 33°F (0°C) | 2.1 in | |
| April | 46°F (8°C) | 3.0 in | |
| May | 57°F (14°C) | 3.4 in | |
| June | 67°F (19°C) | 4.1 in | Wettest |
| July | 72°F (22°C) | 4.0 in | Warmest |
| August | 69°F (20°C) | 3.6 in | |
| September | 61°F (16°C) | 3.9 in | |
| October | 49°F (10°C) | 2.1 in | |
| November | 35°F (2°C) | 1.9 in | |
| December | 22°F (-6°C) | 1.5 in |
Spring Green has a seasonal temperature swing of 53°F / from 19°F in January to 72°F in July. Total annual precipitation is 31.8 inches, with June being the wettest month (4.1") and February the driest (1.0").