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.

Mostly Cloudy with Haze

-9°F

-23°C

Humidity 64%
Wind Speed N 15 mph
Barometer 30.53 in
Dewpoint -18°F (-28°C)
Visibility 2.50 mi
Wind Chill-31°F (-35°C)
Last update 23 Jan 4:35 am CST
Extended Forecast for

Rockton IL

Cold Weather Advisory January 23, 12:00pm until January 24, 09:00am
Extreme Cold Warning January 23, 04:48am until January 23, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
Extreme Cold Warning
  •  
    Extreme Cold Warning January 23, 04:48am until January 23, 12:00pm

    NOW until 12:00pm Fri

    Extreme Cold Warning

  • Overnight

    Low: -14 °F

    Scattered
    Flurries

  • Friday

    Friday: Scattered flurries before noon. Sunny and cold, with a high near -4. Wind chill values as low as -37. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: -4 °F

    Scattered
    Flurries

  • Friday Night

    Friday Night: Increasing clouds, with a low around -14. Wind chill values as low as -27. Northwest wind around 5 mph, with gusts as high as 15 mph.

    Low: -14 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy and cold, with a high near 3. Wind chill values as low as -13. Calm wind becoming north northeast around 5 mph.

    High: 3 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly after midnight. Cloudy, with a low around -2. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: -2 °F

    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 10.

    High: 10 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -6.

    Low: -6 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 10.

    High: 10 °F

    Cold

Detailed Forecast

Overnight
Scattered flurries. Partly cloudy, with a low around -14. Wind chill values as low as -35. Northwest wind around 15 mph, with gusts as high as 30 mph.
Friday
Scattered flurries before noon. Sunny and cold, with a high near -4. Wind chill values as low as -37. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Increasing clouds, with a low around -14. Wind chill values as low as -27. Northwest wind around 5 mph, with gusts as high as 15 mph.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy and cold, with a high near 3. Wind chill values as low as -13. Calm wind becoming north northeast around 5 mph.
Saturday Night
A 30 percent chance of snow, mainly after midnight. Cloudy, with a low around -2. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 10 mph.
Sunday
A 30 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 10.
Sunday Night
Mostly cloudy, with a low around -6.
Monday
Sunny and cold, with a high near 10.
Monday Night
Partly cloudy, with a low around 2.
Tuesday
Partly sunny, with a high near 16.
Tuesday Night
Partly cloudy, with a low around -2.
Wednesday
Mostly sunny, with a high near 11.
Wednesday Night
Mostly cloudy, with a low around -4.
Thursday
Mostly sunny and cold, with a high near 10.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockton IL
 42.45°N 89.05°W
Last Update:
3:06 am CST Jan 23, 2026
Forecast Valid:
4am CST Jan 23, 2026-6pm CST Jan 29, 2026
 
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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