I-39 weather conditions near Janesville, Wisconsin
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Mostly Cloudy 79°F 2026-05-04T14:45:00-05:00
Tonight 2026-05-04, Chance Showers then Slight Chance Showers. A chance of showers and thunderstorms before 1am, then a chance of rain between 1am and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 44. West wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Tuesday 2026-05-05, Partly Sunny. Partly sunny, with a high near 57. Northwest wind 5 to 10 mph.
Tuesday Night 2026-05-05, Mostly Cloudy. Mostly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm in the evening.
Wednesday 2026-05-06, Partly Sunny. Partly sunny, with a high near 55. Northwest wind 5 to 10 mph.
Wednesday Night 2026-05-06, Mostly Cloudy then Areas Frost. Areas of frost after 2am. Otherwise, partly cloudy, with a low around 34. Northwest wind around 5 mph becoming calm in the evening.
Thursday 2026-05-07, Areas Frost then Slight Chance T-storms. A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Areas of frost before 8am. Otherwise, mostly sunny, with a high near 58. Light west wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Thursday Night 2026-05-07, Slight Chance T-storms then Mostly Cloudy. A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 41. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Friday 2026-05-08, Partly Sunny then Slight Chance Showers. A 20 percent chance of showers after 1pm. Partly sunny, with a high near 63. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night 2026-05-08, Slight Chance Showers. A 20 percent chance of showers before 1am. Partly cloudy, with a low around 40.
Saturday 2026-05-09, Sunny. Sunny, with a high near 68.
Saturday Night 2026-05-09, Partly Cloudy then Slight Chance Showers. A 20 percent chance of showers. Partly cloudy, with a low around 46.
Sunday 2026-05-10, Slight Chance Showers then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 65.
Sunday Night 2026-05-10, Slight Chance Showers. A 20 percent chance of showers. Mostly cloudy, with a low around 42.
Monday 2026-05-11, Mostly Sunny. Mostly sunny, with a high near 65.
Current condition: Mostly Cloudy 79°F 2026-05-04T14:45:00-05:00 Tonight 2026-05-04, Chance Showers then Slight Chance Showers. A chance of showers and thunderstorms before 1am, then a chance of rain between 1am and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 44. West wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Tuesday Night 2026-05-05, Mostly Cloudy. Mostly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm in the evening.
Wednesday Night 2026-05-06, Mostly Cloudy then Areas Frost. Areas of frost after 2am. Otherwise, partly cloudy, with a low around 34. Northwest wind around 5 mph becoming calm in the evening.Thursday 2026-05-07, Areas Frost then Slight Chance T-storms. A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Areas of frost before 8am. Otherwise, mostly sunny, with a high near 58. Light west wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Thursday Night 2026-05-07, Slight Chance T-storms then Mostly Cloudy. A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 41. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Friday 2026-05-08, Partly Sunny then Slight Chance Showers. A 20 percent chance of showers after 1pm. Partly sunny, with a high near 63. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night 2026-05-08, Slight Chance Showers. A 20 percent chance of showers before 1am. Partly cloudy, with a low around 40.
Saturday 2026-05-09, Sunny. Sunny, with a high near 68.Saturday Night 2026-05-09, Partly Cloudy then Slight Chance Showers. A 20 percent chance of showers. Partly cloudy, with a low around 46.
Sunday 2026-05-10, Slight Chance Showers then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 65.
Sunday Night 2026-05-10, Slight Chance Showers. A 20 percent chance of showers. Mostly cloudy, with a low around 42.
Monday 2026-05-11, Mostly Sunny. Mostly sunny, with a high near 65.