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.

Light Snow

N/A

Humidity NA
Wind Speed Calm
Barometer 30.35 in
Dewpoint N/A
Visibility 1.75 mi
Last update 29 Nov 1:15 am CST
Extended Forecast for

South Beloit IL

Winter Storm Warning November 29, 03:00am until November 30, 06:00am
Click here for hazard details and duration
Winter Storm Warning

  • Overnight

    Overnight: Snow, mainly after 2am. Steady temperature around 25. Calm wind becoming southeast around 5 mph. Winds could gust as high as 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 25 °F

    Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. Patchy blowing snow after noon. High near 29. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    High: 29 °F

    Heavy Snow
    and Patchy
    Blowing Snow

  • Saturday Night

    Saturday Night: Snow, mainly before 4am. Patchy blowing snow before 7pm, then patchy blowing snow after 3am. Low around 26. North northeast wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 26 °F

    Snow and
    Patchy
    Blowing Snow

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Patchy blowing snow before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 29. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 29 °F

    Chance Snow
    and Patchy
    Blowing Snow
    then Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 3. West northwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 15 mph.

    Low: 3 °F

    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 21.

    High: 21 °F

    Mostly Cloudy
    then Chance
    Snow

  • Monday Night

    Monday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 21.

    High: 21 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow, mainly after 2am. Steady temperature around 25. Calm wind becoming southeast around 5 mph. Winds could gust as high as 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.
Saturday
Snow. The snow could be heavy at times. Patchy blowing snow after noon. High near 29. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Saturday Night
Snow, mainly before 4am. Patchy blowing snow before 7pm, then patchy blowing snow after 3am. Low around 26. North northeast wind 5 to 10 mph becoming northwest 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Sunday
A 30 percent chance of snow before noon. Patchy blowing snow before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 29. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 3. West northwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 15 mph.
Monday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 21.
Monday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.
Tuesday
Partly sunny, with a high near 21.
Tuesday Night
Mostly cloudy, with a low around 11.
Wednesday
A chance of snow after noon. Mostly cloudy, with a high near 27.
Wednesday Night
A chance of snow. Partly cloudy, with a low around -1.
Thursday
Mostly sunny, with a high near 15.
Thursday Night
Mostly cloudy, with a low around 2.
Friday
Mostly cloudy, with a high near 27.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
12:41 am CST Nov 29, 2025
Forecast Valid:
1am CST Nov 29, 2025-6pm CST Dec 5, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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