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.

Fair

27°F

-3°C

Humidity 93%
Wind Speed E 6 mph
Barometer 30.31 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 24 Dec 6:45 am CST
Extended Forecast for

South Beloit IL

  • Today

    Today: Drizzle, mainly after 5pm. Mostly cloudy, with a high near 42. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 42 °F

    Mostly Cloudy
    then Drizzle

  • Tonight

    Tonight: Drizzle, mainly before 8pm. Patchy fog after 9pm. Otherwise, cloudy, with a low around 34. Light and variable wind becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 15 mph.

    Low: 34 °F

    Drizzle and
    Patchy Fog
    then Areas
    Drizzle and
    Patchy Fog

  • Christmas Day

    Christmas Day: Cloudy, with a high near 39. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 39 °F

    Cloudy

  • Thursday Night

    Thursday Night: Rain, mainly after midnight. Low around 35. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 35 °F

    Slight Chance
    Rain then
    Rain

  • Friday

    Friday: A 30 percent chance of rain before noon. Cloudy, with a high near 44. Southeast wind 5 to 10 mph becoming northwest in the afternoon.

    High: 44 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 36. Breezy.

    High: 36 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
Drizzle, mainly after 5pm. Mostly cloudy, with a high near 42. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Drizzle, mainly before 8pm. Patchy fog after 9pm. Otherwise, cloudy, with a low around 34. Light and variable wind becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 15 mph.
Christmas Day
Cloudy, with a high near 39. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Rain, mainly after midnight. Low around 35. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Friday
A 30 percent chance of rain before noon. Cloudy, with a high near 44. Southeast wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Partly sunny, with a high near 36. Breezy.
Sunday Night
Partly cloudy, with a low around 8. Blustery.
Monday
Mostly sunny, with a high near 18. Blustery.
Monday Night
Partly cloudy, with a low around 10.
Tuesday
Partly 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:
7:32 am CST Dec 24, 2025
Forecast Valid:
8am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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