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.

A Few Clouds

25°F

-4°C

Humidity 63%
Wind Speed Calm
Barometer 30.34 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 28 Nov 4:45 pm CST
Extended Forecast for

Harvard IL

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

  • Tonight

    Tonight: Snow likely, mainly after 4am. Cloudy, with a low around 21. Calm wind becoming southeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 21 °F

    Mostly Cloudy
    then Snow
    Likely

  • Saturday

    Saturday: Snow. The snow could be heavy at times. High near 28. 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: 28 °F

    Heavy Snow

  • Saturday Night

    Saturday Night: Snow. Patchy blowing snow after 3am. Low around 26. East 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 40 percent chance of snow before noon. Patchy blowing snow before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 28. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 28 °F

    Chance Snow
    and Patchy
    Blowing Snow
    then Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 4. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 15 mph.

    Low: 4 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 19.

    High: 19 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    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

Tonight
Snow likely, mainly after 4am. Cloudy, with a low around 21. Calm wind becoming southeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Saturday
Snow. The snow could be heavy at times. High near 28. 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. Patchy blowing snow after 3am. Low around 26. East 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 40 percent chance of snow before noon. Patchy blowing snow before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 28. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 4. West northwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 15 mph.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 19.
Monday Night
A 40 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
Mostly cloudy, with a high near 28.
Wednesday Night
Mostly cloudy, with a low around 5.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 3.
Friday
A chance of snow. Partly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.42°N 88.61°W
Last Update:
3:11 pm CST Nov 28, 2025
Forecast Valid:
5pm CST Nov 28, 2025-6pm CST Dec 5, 2025
 
Forecast Discussion
 
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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