National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Rain

34°F

1°C

Humidity 81%
Wind Speed E 7 mph
Barometer 30.13 in
Dewpoint 28°F (-2°C)
Visibility 7.00 mi
Wind Chill28°F (-2°C)
Last update 3 Mar 5:45 am CST
Extended Forecast for

Janesville WI

  • Today

    Today: Areas of drizzle before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 45. Calm wind becoming southeast around 5 mph.

    High: 45 °F

    Areas Drizzle
    then Mostly
    Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 28. Northeast wind around 5 mph becoming calm.

    Low: 28 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 52. Calm wind becoming east around 5 mph in the morning.

    High: 52 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly before noon. Cloudy, with a high near 51. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 40. East wind around 5 mph becoming calm.

    Low: 40 °F

    Slight Chance
    Rain

  • Friday

    Friday: Rain, with thunderstorms also possible after noon. High near 63. Southeast wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Rain

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 48. Southwest wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Cloudy, then gradually becoming mostly sunny, with a high near 59.

    High: 59 °F

    Slight Chance
    Rain then
    Partly Sunny

Detailed Forecast

Today
Areas of drizzle before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 45. Calm wind becoming southeast around 5 mph.
Tonight
Partly cloudy, with a low around 28. Northeast wind around 5 mph becoming calm.
Wednesday
Mostly sunny, with a high near 52. Calm wind becoming east around 5 mph in the morning.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening.
Thursday
Rain likely, mainly before noon. Cloudy, with a high near 51. East wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 40. East wind around 5 mph becoming calm.
Friday
Rain, with thunderstorms also possible after noon. High near 63. Southeast wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain and possibly a thunderstorm. Low around 48. Southwest wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 20 percent chance of rain before noon. Cloudy, then gradually becoming mostly sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
Last Update:
5:36 am CST Mar 3, 2026
Forecast Valid:
6am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation