All Countries
Sun Prairie, WI
Full City Profile · Wisconsin · Dane County County
3.8
/5.0
B+
Good
36,455
Population
2,785/sq mi density
$90,521
Median Income
$45,715 per capita
$339,800
Home Value
$428,907 Zillow
$1,374
Median Rent
27.7% income on rent
47°F
Avg Temperature
260 sunny days/yr
95
Violent Crime/100K
1,441 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$90,521 median income, 1.5% unemployment
A+
Affordability
4.6 / 5.0
$339,800 home value, $1,374/mo rent
F
Safety
1.0 / 5.0
95 violent crimes/100K
A+
Education
5.0 / 5.0
50.9% bachelor's degree or higher
Sun Prairie experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 19°F in January while summers reach 72°F in July. The area gets 260 sunny days per year. Annual precipitation totals 37.1 inches. The area receives 51.8 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
19°F Jan (-7°C)
72°F Jul (22°C)
| Annual Average | 47.0°F |
| 13% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 988 ft (301 m) |
| Area | 12.0 sq mi (31.2 km²) |
| Population Density | 2,785/sq mi |
| Coordinates | 43.1826°N, 89.2378°W |
| Timezone | America/Chicago |
| County | Dane County County |
| Nearest Airport | Dane County Regional/Truax Field (MSN) 6 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0501 ppm |
| PM2.5 (Fine Particles) | 10.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 93.9 / 100 |
| Social Vulnerability | 15.9 / 100 |
| Community Resilience | 97.8 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Very High |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.2 in | Coldest, Driest |
| February | 21°F (-6°C) | 1.2 in | |
| March | 33°F (0°C) | 2.2 in | |
| April | 46°F (8°C) | 3.3 in | |
| May | 58°F (14°C) | 3.4 in | |
| June | 67°F (20°C) | 3.9 in | |
| July | 72°F (22°C) | 3.9 in | Warmest |
| August | 69°F (20°C) | 4.1 in | Wettest |
| September | 61°F (16°C) | 3.6 in | |
| October | 49°F (10°C) | 2.3 in | |
| November | 35°F (2°C) | 2.3 in | |
| December | 22°F (-6°C) | 1.7 in |
Sun Prairie has a seasonal temperature swing of 53°F / from 19°F in January to 72°F in July. Total annual precipitation is 33.0 inches, with August being the wettest month (4.1") and January the driest (1.2").