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

37°F

3°C

Humidity 75%
Wind Speed Vrbl 3 mph
Barometer 30.16 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 3 Mar 6:45 pm CST
Extended Forecast for

Harvard IL

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 20 percent chance of showers after 3pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 48. East wind 5 to 10 mph.

    High: 48 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 3am. Patchy fog after midnight. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Slight Chance
    Showers then
    Showers
    Likely and
    Patchy Fog

  • Thursday

    Thursday: Showers likely, mainly before noon. Patchy fog before 8am. Otherwise, cloudy, with a high near 48. Northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%.

    High: 48 °F

    Showers
    Likely and
    Patchy Fog
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 39. Calm wind becoming east southeast around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: 39 °F

    Slight Chance
    Showers

  • Friday

    Friday: Showers before noon, then showers and possibly a thunderstorm between noon and 3pm, then showers after 3pm. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 47. Chance of precipitation is 90%.

    Low: 47 °F

    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 30. Calm wind.
Wednesday
A 20 percent chance of showers after 3pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 48. East wind 5 to 10 mph.
Wednesday Night
Showers likely, mainly after 3am. Patchy fog after midnight. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely, mainly before noon. Patchy fog before 8am. Otherwise, cloudy, with a high near 48. Northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 39. Calm wind becoming east southeast around 5 mph after midnight. Winds could gust as high as 10 mph.
Friday
Showers before noon, then showers and possibly a thunderstorm between noon and 3pm, then showers after 3pm. High near 66. Chance of precipitation is 90%.
Friday Night
Showers and possibly a thunderstorm. Low around 47. Chance of precipitation is 90%.
Saturday
Mostly cloudy, with a high near 59.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Mostly sunny, with a high near 60. Breezy.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 47.
Tuesday
A chance of showers. Partly sunny, with a high near 65.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.44°N 88.61°W
Last Update:
7:32 pm CST Mar 3, 2026
Forecast Valid:
7pm CST Mar 3, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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