I-39 weather conditions near Sun Prairie Weather, Wisconsin
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7 day weather forecast
Current condition: Overcast 71°F 2025-08-11T03:35:00-05:00 
Overnight 2025-08-11, Slight Chance Showers and Patchy Fog. A 10 percent chance of showers after 5am. Patchy fog. Otherwise, mostly cloudy, with a low around 68. West wind around 5 mph.Monday 2025-08-11, Areas Fog then Mostly Sunny. Areas of fog before 9am. Otherwise, mostly sunny, with a high near 83. West wind around 5 mph.
Monday Night 2025-08-11, Chance Showers and Patchy Fog. A slight chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 69. Southwest wind around 5 mph. Chance of precipitation is 50%.Tuesday 2025-08-12, Chance Showers and Patchy Fog then Chance T-storms. A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Tuesday Night 2025-08-12, Chance T-storms then Slight Chance Showers. A chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Mostly clear, with a low around 62. West wind around 5 mph. Chance of precipitation is 30%.
Wednesday 2025-08-13, Sunny. Sunny, with a high near 80. Northwest wind around 5 mph.
Wednesday Night 2025-08-13, Mostly Clear. Mostly clear, with a low around 61. Northwest wind around 5 mph becoming calm.- Thursday 2025-08-14, Sunny. Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
- Thursday Night 2025-08-14, Mostly Clear. Mostly clear, with a low around 64.
Friday 2025-08-15, Mostly Sunny. Mostly sunny, with a high near 87.Friday Night 2025-08-15, Partly Cloudy then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday 2025-08-16, Chance T-storms. A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Saturday Night 2025-08-16, Chance Showers. A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday 2025-08-17, Chance Showers. A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.