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

30°F

-1°C

Humidity 75%
Wind Speed S 13 G 23 mph
Barometer 29.93 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 4 Jan 6:45 pm CST
Extended Forecast for

Harvard IL

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 28. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Gradual
    Clearing

  • Monday

    Monday: Patchy fog before noon. Otherwise, mostly cloudy, with a high near 39. Southwest wind 5 to 10 mph.

    High: 39 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A slight chance of drizzle after midnight. Patchy fog. Otherwise, mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Patchy Fog
    then Slight
    Chance
    Drizzle and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of drizzle before noon. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 41. Southeast wind around 5 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph.

    High: 41 °F

    Chance
    Drizzle and
    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. West wind around 5 mph, with gusts as high as 10 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain after noon. Partly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Cloudy during the early evening, then gradual clearing, with a low around 28. South wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Patchy fog before noon. Otherwise, mostly cloudy, with a high near 39. Southwest wind 5 to 10 mph.
Monday Night
A slight chance of drizzle after midnight. Patchy fog. Otherwise, mostly cloudy, with a low around 33. Calm wind.
Tuesday
A chance of drizzle before noon. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 41. Southeast wind around 5 mph becoming west northwest in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 30. West wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
A chance of rain after noon. Partly sunny, with a high near 46.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 32.
Friday
A chance of rain. Mostly cloudy, with a high near 41.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 26.
Saturday
A chance of snow. Mostly cloudy, with a high near 32.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Mostly sunny, with a high near 29.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harvard IL
 42.42°N 88.61°W
Last Update:
5:06 pm CST Jan 4, 2026
Forecast Valid:
7pm CST Jan 4, 2026-6pm CST Jan 11, 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