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.

Mostly Cloudy

68°F

20°C

Humidity 94%
Wind Speed SW 7 mph
Barometer 29.73 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 11 Jun 6:45 am CDT
Extended Forecast for

Afton WI

  • Today

    Today: Showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. High near 81. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 81 °F

    Chance
    T-storms then
    Severe
    Thunderstorms
    and Breezy

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 9pm. Some of the storms could be severe and produce heavy rainfall. Low around 54. Windy, with a west wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Severe
    Thunderstorms
    and Windy
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 79. West wind 10 to 15 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 58. Southwest wind 5 to 10 mph.

    Low: 58 °F

    Clear

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 82 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. West wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers
    Likely

  • Sunday

    Sunday: Sunny, with a high near 71. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph.

    High: 71 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 51. West wind 5 to 10 mph.

    Low: 51 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 74.

    High: 74 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. High near 81. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers and thunderstorms, mainly before 9pm. Some of the storms could be severe and produce heavy rainfall. Low around 54. Windy, with a west wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Sunny, with a high near 79. West wind 10 to 15 mph.
Friday Night
Clear, with a low around 58. Southwest wind 5 to 10 mph.
Saturday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. West wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Sunny, with a high near 71. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 51. West wind 5 to 10 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 74.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 52.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Afton WI
 42.71°N 89.09°W (Elev. 899 ft)
Last Update:
6:32 am CDT Jun 11, 2026
Forecast Valid:
7am CDT Jun 11, 2026-6pm CDT Jun 17, 2026
 
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