Wisconsin · NWS MKX office

Sun Prairie, WI weather

It is 54°F and clear at Madison, Dane County Regional-Truax Field as of Oct 28, 4:05 AM CDT. Overnight: Mostly Clear, low near 50°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 3:32 AM CDT.

Updated Oct 28, 4:23 AM CDT (snapshot)

Current conditions

Temperature

54°F

Clear

Wind

S 6 mph

Humidity 82% · dew point 48°F

Pressure · visibility

30.15 inHg

Visibility 10 mi

Observed at Madison, Dane County Regional-Truax Field (KMSN), Oct 28, 4:05 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Sun Prairie forecast zone right now.

Around the NWS MKX forecast area

No active alerts in zones served by the MKX office near Sun Prairie.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in Wisconsin.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Sun Prairie (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM52°FMostly Clear1%S 5 mph
Wed 5 AM51°FMostly Clear1%S 5 mph
Wed 6 AM51°FSunny1%S 5 mph
Wed 7 AM50°FSunny0%S 5 mph
Wed 8 AM51°FSunny0%S 5 mph
Wed 9 AM55°FSunny0%S 5 mph
Wed 10 AM59°FSunny0%S 5 mph
Wed 11 AM63°FSunny0%S 10 mph
Wed 12 PM67°FSunny0%S 10 mph
Wed 1 PM70°FSunny0%S 10 mph
Wed 2 PM72°FSunny1%S 10 mph
Wed 3 PM72°FSunny1%S 15 mph
Wed 4 PM72°FMostly Sunny1%S 10 mph
Wed 5 PM71°FMostly Sunny1%S 10 mph
Wed 6 PM68°FMostly Clear4%S 10 mph
Wed 7 PM66°FMostly Clear6%S 10 mph
Wed 8 PM65°FPartly Cloudy7%S 15 mph
Wed 9 PM64°FPartly Cloudy8%S 15 mph
Wed 10 PM65°FSlight Chance Showers And Thunderstorms18%S 15 mph
Wed 11 PM64°FChance Showers And Thunderstorms29%S 15 mph
Thu 12 AM64°FChance Showers And Thunderstorms40%S 15 mph
Thu 1 AM63°FChance Showers And Thunderstorms52%SW 15 mph
Thu 2 AM62°FChance Showers And Thunderstorms47%SW 15 mph
Thu 3 AM60°FChance Showers And Thunderstorms42%SW 15 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Sun Prairie can differ.

7-day forecast

Overnight

Low 50°F

Mostly clear, with a low around 50. South wind around 5 mph.

Wednesday

High 73°F·Low 57°F

Sunny, with a high near 73. South wind 5 to 15 mph.

Wednesday Night: A slight chance of showers and thunderstorms between 10pm and 11pm, then a chance of showers and thunderstorms between 11pm and 5am. Mostly cloudy, with a low around 57. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Thursday

High 66°F·Low 38°F

Mostly sunny, with a high near 66. West wind around 10 mph. New rainfall amounts less than a tenth of an inch possible.

Thursday Night: Mostly clear, with a low around 38. North wind 0 to 5 mph.

Friday

High 60°F·Low 43°F

Partly sunny, with a high near 60. East wind 0 to 5 mph.

Friday Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 43. East wind 0 to 5 mph. Chance of precipitation is 20%.

Saturday

High 64°F·Low 46°F

A chance of rain showers. Mostly cloudy, with a high near 64. East wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.

Sunday

High 66°F·Low 49°F

A chance of rain showers. Mostly cloudy, with a high near 66. Chance of precipitation is 30%.

Sunday Night: A slight chance of rain showers before midnight. Mostly cloudy, with a low around 49. Chance of precipitation is 20%.

Monday

High 65°F·Low 50°F

A chance of rain showers. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.

Tuesday

High 64°F

Rain showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

Nearby cities

Larger cities in the area

Other cities in Dane County

See every city we cover in Wisconsin, or check all active alerts.

About this forecast

Forecast office
Sun Prairie is served by the National Weather Service MKX forecast office, forecast zone WIZ063, county zone WIC025.
Location used
The Census Bureau's internal point for Sun Prairie (43.1826, -89.2378), in Dane County. Population: 39,253 (2024 estimate), number 20 of the 42 Wisconsin cities on this site.
Radar
Nearest NWS radar: KMKX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/43.1826,-89.2378 (forecast issued Oct 28, 3:32 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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