National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

25°F

-4°C

Humidity 50%
Wind Speed N 7 mph
Barometer 30.36 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 23 Feb 5:45 pm CST
Extended Forecast for

Harvard IL

  • Tonight

    Tonight: Increasing clouds, with a low around 15. Light and variable wind becoming south 5 to 10 mph after midnight.

    Low: 15 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A slight chance of snow showers before 4pm, then a slight chance of rain showers between 4pm and 5pm, then a slight chance of rain and snow showers after 5pm. Cloudy, with a high near 40. Breezy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.

    High: 40 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Cloudy during the early evening, then gradual clearing, with a low around 19. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Gradual
    Clearing

  • Wednesday

    Wednesday: Sunny, with a high near 31. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 31 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 19. West northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.

    Low: 19 °F

    Chance Snow

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly sunny, with a high near 39.

    High: 39 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 15. Light and variable wind becoming south 5 to 10 mph after midnight.
Tuesday
A slight chance of snow showers before 4pm, then a slight chance of rain showers between 4pm and 5pm, then a slight chance of rain and snow showers after 5pm. Cloudy, with a high near 40. Breezy, with a south wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 20%.
Tuesday Night
Cloudy during the early evening, then gradual clearing, with a low around 19. West northwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 31. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 19. West northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.
Thursday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 39.
Thursday Night
Mostly clear, with a low around 25.
Friday
Mostly sunny, with a high near 54.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 17.
Sunday
A chance of snow. Partly sunny, with a high near 29.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 18.
Monday
A chance of snow. Mostly cloudy, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.42°N 88.61°W
Last Update:
4:46 pm CST Feb 23, 2026
Forecast Valid:
6pm CST Feb 23, 2026-6pm CST Mar 2, 2026
 
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