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

Flash Flooding Continuing Along the Gulf Coast; Dry Thunderstorms in the West

Excessive rainfall continues to produce life-threatening, locally catastrophic flash flooding along the central Gulf Coast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts Oregon, California, and the Great Basin into the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

63°F

17°C

Humidity 73%
Wind Speed W 3 mph
Barometer 29.95 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 19 Jun 9:50 pm CDT
Extended Forecast for

Harvard IL

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 55. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 76. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Light east wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    High: 71 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 55. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 55. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 76. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 56. North northwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Light east wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 55. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Monday
Partly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 54.
Friday
Mostly sunny, with a high near 77.
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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 pm CDT Jun 19, 2026
Forecast Valid:
10pm CDT Jun 19, 2026-6pm CDT Jun 26, 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