7-Day Forecast 42.67°N 89.04°W (Text-Only)
NWS Forecast for: Janesville WI
Issued by: National Weather Service Milwaukee, WI
Last Update: 5:38 am CDT Jul 16, 2025
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  • Today

    Today: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm.  Patchy fog before 8am.  Otherwise, partly sunny and hot, with a high near 32. South wind 5 to 10 km/h increasing to 15 to 20 km/h in the afternoon.  Chance of precipitation is 70%. New rainfall amounts between 7.5 mm and 1 cm possible.

    High: 32 °C

    Patchy Fog
    then T-storms
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 17. Southwest wind around 15 km/h becoming northwest after midnight.  Chance of precipitation is 50%.

    Low: 17 °C

    Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly cloudy, with a high near 21. North wind around 15 km/h.

    High: 21 °C

    Mostly Cloudy



  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 11. East wind 5 to 10 km/h.

    Low: 11 °C

    Partly Cloudy



  • Friday

    Friday: Mostly sunny, with a high near 25. Northeast wind 5 to 10 km/h becoming southeast in the afternoon.

    High: 25 °C

    Mostly Sunny



  • Friday
    Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 16. Southeast wind 5 to 10 km/h.

    Low: 16 °C

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 27. Southeast wind 5 to 10 km/h becoming west in the afternoon.

    High: 27 °C

    Chance
    Showers then
    Chance
    T-storms

  • Saturday
    Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Mostly cloudy, with a low around 18. Northwest wind 5 to 10 km/h becoming northeast in the evening.

    Low: 18 °C

    Chance
    T-storms


  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 26. Chance of precipitation is 20%.

    High: 26 °C

    Slight Chance
    Showers then
    Slight Chance
    T-storms



  • Today: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm. Patchy fog before 8am. Otherwise, partly sunny and hot, with a high near 32. South wind 5 to 10 km/h increasing to 15 to 20 km/h in the afternoon. Chance of precipitation is 70%. New rainfall amounts between 7.5 mm and 1 cm possible.

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 17. Southwest wind around 15 km/h becoming northwest after midnight. Chance of precipitation is 50%.

    Thursday: Mostly cloudy, with a high near 21. North wind around 15 km/h.

    Thursday Night: Partly cloudy, with a low around 11. East wind 5 to 10 km/h.

    Friday: Mostly sunny, with a high near 25. Northeast wind 5 to 10 km/h becoming southeast in the afternoon.

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 16. Southeast wind 5 to 10 km/h.

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 27. Southeast wind 5 to 10 km/h becoming west in the afternoon.

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 18. Northwest wind 5 to 10 km/h becoming northeast in the evening.

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 26. Chance of precipitation is 20%.

    Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 30%.

    Monday: A 30 percent chance of showers. Partly sunny, with a high near 27.

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 19.

    Tuesday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 31.



    Janesville WI
     42.67°N 89.04°W (Elev. 774 m)

    Visit your local NWS office at: https://www.weather.gov/mkx