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

Areas of Heavy to Excessive Rainfall and Hot Temperatures This Week

Heavy to excessive rainfall could bring areas of flooding at times Monday through Thursday across parts of the central Plains into the Midwest as well as southern Arizona and New Mexico. Hot temperatures and high humidity will continue across much of east Texas into the lower and mid-Mississippi Valley through at least midweek. Read More >

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

52°F

11°C

Humidity 94%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 13 Sep 10:15 pm CDT
Extended Forecast for

Darien WI

  • Tonight

    Tonight: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 74. Light and variable wind becoming south 10 to 15 mph in the morning.

    High: 74 °F

    Sunny then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Breezy.
    Slight Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. High near 78. Southwest wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.

    Low: 55 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 75. Northeast wind 5 to 10 mph.

    High: 75 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 44. Calm wind.
Monday
A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 74. Light and variable wind becoming south 10 to 15 mph in the morning.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. High near 78. Southwest wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 72. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. East wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A 50 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 75. Northeast wind 5 to 10 mph.
Thursday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 58.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 40%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Saturday
Showers likely. Partly sunny, with a high near 76. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
10:32 pm CDT Sep 13, 2026
Forecast Valid:
10pm CDT Sep 13, 2026-6pm CDT Sep 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