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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

77°F

25°C

Humidity 36%
Wind Speed SW 13 G 24 mph
Barometer 29.65 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Mar 5:45 pm CDT
Extended Forecast for

3 Miles NNW Afton WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. Southwest wind 5 to 15 mph becoming northeast after midnight.

    Low: 43 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain between 8am and noon. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. North wind 5 to 15 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 47. North wind around 5 mph.

    High: 47 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 31. East wind around 5 mph becoming south after midnight.

    Low: 31 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. South wind around 10 mph.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. Southeast wind 5 to 10 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind around 10 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 43. Southwest wind 5 to 15 mph becoming northeast after midnight.
Sunday
A slight chance of rain between 8am and noon. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 26. North wind 5 to 15 mph.
Monday
Sunny, with a high near 47. North wind around 5 mph.
Monday Night
Increasing clouds, with a low around 31. East wind around 5 mph becoming south after midnight.
Tuesday
Mostly cloudy, with a high near 55. South wind around 10 mph.
Tuesday Night
Mostly cloudy, with a low around 37. Southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind around 10 mph.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 58.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
Sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Afton WI
 42.74°N 89.12°W (Elev. 948 ft)
Last Update:
5:07 pm CDT Mar 21, 2026
Forecast Valid:
6pm CDT Mar 21, 2026-6pm CDT Mar 28, 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