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

36°F

2°C

Humidity 75%
Wind Speed E 3 mph
Barometer 30.15 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 25 Mar 1:30 am CDT
Extended Forecast for

3 Miles ESE South Beloit IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. South southeast wind around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 69 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51. South southwest wind 5 to 10 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southeast wind 5 to 10 mph becoming north northeast 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 27. Blustery, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Slight Chance
    Showers and
    Blustery then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. South southeast wind around 5 mph.
Wednesday
Partly sunny, with a high near 69. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 51. South southwest wind 5 to 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. South southeast wind 5 to 10 mph becoming north northeast 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Thursday Night
A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 27. Blustery, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 44.
Friday Night
Mostly clear, with a low around 24.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 71.
Monday Night
A chance of showers. Mostly cloudy, with a low around 50.
Tuesday
A chance of showers. Mostly cloudy, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE South Beloit IL
 42.47°N 88.99°W
Last Update:
1:15 am CDT Mar 25, 2026
Forecast Valid:
1am CDT Mar 25, 2026-6pm CDT Mar 31, 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