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.

Overcast

59°F

15°C

Humidity 82%
Wind Speed N 5 mph
Barometer 29.98 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 14 Oct 5:15 am CDT
Extended Forecast for

Harvard IL

  • Today

    Today: Mostly cloudy, with a high near 63. North northeast wind 5 to 10 mph.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. East northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, then rain and possibly a thunderstorm after 1pm. High near 57. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 57 °F

    Rain Likely
    then Rain

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 46. 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 80%.

    Low: 46 °F

    Rain

  • Friday

    Friday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph.

    High: 53 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 54.

    High: 54 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 63. North northeast wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 52. East northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Rain likely, then rain and possibly a thunderstorm after 1pm. High near 57. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 46. 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 80%.
Friday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph.
Friday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 54.
Saturday Night
Clear, with a low around 39.
Sunday
Sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.42°N 88.61°W
Last Update:
5:46 am CDT Oct 14, 2026
Forecast Valid:
6am CDT Oct 14, 2026-6pm CDT Oct 20, 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