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.

Overcast

21°F

-6°C

Humidity 68%
Wind Speed NW 15 mph
Barometer 30.07 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 11 Jan 1:10 am CST
Extended Forecast for

South Beloit IL

  • Overnight

    Overnight: Snow showers likely, mainly before 2am. Cloudy, with a low around 22. Blustery, with a west northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

    Low: 22 °F

    Snow Showers
    Likely and
    Blustery

  • Sunday

    Sunday: A chance of flurries before 9am. Partly sunny, with a high near 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 30 °F

    Chance
    Flurries and
    Blustery then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a steady temperature around 27. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41. West southwest wind around 10 mph, with gusts as high as 15 mph.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 46.

    High: 46 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 30. Blustery.

    High: 30 °F

    Mostly Cloudy
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

Detailed Forecast

Overnight
Snow showers likely, mainly before 2am. Cloudy, with a low around 22. Blustery, with a west northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Sunday
A chance of flurries before 9am. Partly sunny, with a high near 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.
Sunday Night
Partly cloudy, with a steady temperature around 27. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 41. West southwest wind around 10 mph, with gusts as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 30. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 46.
Tuesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 25.
Wednesday
Mostly cloudy, with a high near 30. Blustery.
Wednesday Night
Partly cloudy, with a low around 14.
Thursday
Partly sunny, with a high near 29.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 24.
Friday
A chance of snow. Mostly cloudy, with a high near 33.
Friday Night
A chance of snow. Mostly cloudy, with a low around 16.
Saturday
Mostly cloudy, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:11 am CST Jan 11, 2026
Forecast Valid:
1am CST Jan 11, 2026-6pm CST Jan 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