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

Severe Thunderstorms and Heavy Rainfall Across the Central Plains and Central Appalachians

Severe thunderstorms producing damaging winds, heavy rainfall, hail and possibly a few tornadoes will continue through tonight across portions of Kansas and Oklahoma. Heavy rainfall will persist across the Central Appalachians through tonight, potentially leading to areas of flooding. The severe weather and heavy rainfall threat will shift into the lower Great Lakes on Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

68°F

20°C

Humidity 88%
Wind Speed E 7 mph
Barometer 29.80 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 18 Jun 1:10 am CDT
Extended Forecast for

Janesville WI

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly before 4am. Cloudy, with a low around 68. Calm wind becoming northeast around 5 mph.

    Low: 68 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Some of the storms could produce heavy rainfall. Cloudy, with a high near 74. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    High: 74 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60. Northwest wind 5 to 10 mph.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 83. West wind 5 to 10 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Southwest wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 85. South wind 5 to 15 mph.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 71. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 93. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 93 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly before 4am. Cloudy, with a low around 68. Calm wind becoming northeast around 5 mph.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Some of the storms could produce heavy rainfall. Cloudy, with a high near 74. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60. Northwest wind 5 to 10 mph.
Juneteenth
Sunny, with a high near 83. West wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 62. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 85. South wind 5 to 15 mph.
Friday Night
Mostly clear, with a low around 71. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny and hot, with a high near 93. Southwest wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny and hot, with a high near 93.
Sunday Night
Mostly clear, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 92.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
Last Update:
11:08 pm CDT Jun 17, 2025
Forecast Valid:
1am CDT Jun 18, 2025-6pm CDT Jun 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation