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

25°F

-4°C

Humidity 54%
Wind Speed S 13 G 16 mph
Barometer 29.72 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 15 Jan 7:45 pm CST
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Snow, mainly before 1am. Temperature rising to around 26 by 3am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 2 inches possible.

    Low: 23 °F⇑

    Snow

  • Friday

    Friday: Snow likely, mainly before 9am. Mostly cloudy, with a high near 34. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Snow Likely
    then Chance
    Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 12. Wind chill values as low as -2. West wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 12 °F

    Slight Chance
    Snow Showers

  • Saturday

    Saturday: A 30 percent chance of snow showers. Mostly cloudy, with a high near 17. Wind chill values as low as -2. West wind around 15 mph, with gusts as high as 25 mph.

    High: 17 °F

    Chance Snow
    Showers

  • Saturday Night

    Saturday Night: A chance of flurries before midnight. Mostly cloudy, with a low around 5. West wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 5 °F

    Chance
    Flurries

  • Sunday

    Sunday: A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 17.

    High: 17 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A chance of flurries before midnight. Mostly cloudy, with a low around 0.

    Low: 0 °F

    Chance
    Flurries

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 6.

    High: 6 °F

    Cold

  • Monday Night

    Monday Night: Partly cloudy, with a low around -1.

    Low: -1 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow, mainly before 1am. Temperature rising to around 26 by 3am. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 2 inches possible.
Friday
Snow likely, mainly before 9am. Mostly cloudy, with a high near 34. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 12. Wind chill values as low as -2. West wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow showers. Mostly cloudy, with a high near 17. Wind chill values as low as -2. West wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
A chance of flurries before midnight. Mostly cloudy, with a low around 5. West wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 17.
Sunday Night
A chance of flurries before midnight. Mostly cloudy, with a low around 0.
M.L.King Day
Partly sunny and cold, with a high near 6.
Monday Night
Partly cloudy, with a low around -1.
Tuesday
Mostly sunny, with a high near 18.
Tuesday Night
Mostly cloudy, with a low around 11.
Wednesday
Partly sunny, with a high near 22.
Wednesday Night
Partly cloudy, with a low around 8.
Thursday
Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
6:51 pm CST Jan 15, 2026
Forecast Valid:
8pm CST Jan 15, 2026-6pm CST Jan 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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