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.

Overcast

72°F

22°C

Humidity 78%
Wind Speed N 14 mph
Barometer 29.93 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 2 Aug 11:45 am CDT
Extended Forecast for

Harvard IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 77 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. North northeast wind 5 to 10 mph becoming light after midnight.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming east southeast around 5 mph.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the morning. Winds could gust as high as 15 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers before 1pm. Partly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 77. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 57. North northeast wind 5 to 10 mph becoming light after midnight.
Monday
Sunny, with a high near 80. Calm wind becoming east southeast around 5 mph.
Monday Night
Mostly clear, with a low around 58. Calm wind.
Tuesday
Sunny, with a high near 82. Calm wind becoming south southwest around 5 mph in the morning. Winds could gust as high as 15 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 58.
Thursday
A chance of showers before 1pm. Partly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 81.
Friday Night
Mostly cloudy, with a low around 62.
Saturday
Partly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.42°N 88.61°W
Last Update:
9:11 am CDT Aug 2, 2026
Forecast Valid:
12pm CDT Aug 2, 2026-6pm CDT Aug 8, 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