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

21°F

-6°C

Humidity 86%
Wind Speed SE 9 mph
Barometer 30.05 in
Dewpoint 18°F (-8°C)
Visibility 2.00 mi
Wind Chill11°F (-12°C)
Last update 18 Mar 1:55 am CDT
Extended Forecast for

South Beloit IL

  • Overnight

    Overnight: Snow showers. Steady temperature around 21. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.

    Low: 21 °F

    Snow Showers

  • Wednesday

    Wednesday: Snow showers likely before 7am. Partly sunny, with a high near 38. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Snow Showers
    Likely then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Scattered showers, mainly after 1am. Mostly cloudy, with a low around 30. South southwest wind around 5 mph. Chance of precipitation is 40%.

    Low: 30 °F

    Scattered
    Showers

  • Thursday

    Thursday: Isolated showers before 1pm. Partly sunny, with a high near 48. South southeast wind around 5 mph becoming north northeast in the afternoon. Chance of precipitation is 20%.

    High: 48 °F

    Isolated
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. North northeast wind around 5 mph becoming south southwest after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow showers. Steady temperature around 21. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
Snow showers likely before 7am. Partly sunny, with a high near 38. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Scattered showers, mainly after 1am. Mostly cloudy, with a low around 30. South southwest wind around 5 mph. Chance of precipitation is 40%.
Thursday
Isolated showers before 1pm. Partly sunny, with a high near 48. South southeast wind around 5 mph becoming north northeast in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 36. North northeast wind around 5 mph becoming south southwest after midnight.
Friday
Mostly cloudy, with a high near 61.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly cloudy, with a high near 57.
Sunday Night
Partly cloudy, with a low around 26.
Monday
Partly sunny, with a high near 43.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly cloudy, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:16 am CDT Mar 18, 2026
Forecast Valid:
2am CDT Mar 18, 2026-6pm CDT Mar 24, 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