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

46°F

8°C

Humidity 50%
Wind Speed W 16 G 30 mph
Barometer 30.09 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 19 Apr 9:45 am CDT
Extended Forecast for

Darien WI

  • Today

    Today: Scattered showers between noon and 5pm, then scattered sprinkles with isolated showers after 5pm. Mostly cloudy, with a high near 47. South wind 5 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 40%.

    High: 47 °F

    Scattered
    Showers

  • Tonight

    Tonight: Widespread frost after midnight. Otherwise, mostly clear, with a low around 26. Northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 26 °F

    Partly Cloudy
    then Frost

  • Monday

    Monday: Widespread frost before 9am. Otherwise, sunny, with a high near 53. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 53 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. South wind around 10 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 71. Southwest wind 10 to 15 mph.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 43. West wind around 5 mph becoming northeast after midnight.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Northeast wind 5 to 10 mph becoming southeast in the afternoon.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. Southeast wind 5 to 10 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Scattered showers between noon and 5pm, then scattered sprinkles with isolated showers after 5pm. Mostly cloudy, with a high near 47. South wind 5 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 40%.
Tonight
Widespread frost after midnight. Otherwise, mostly clear, with a low around 26. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Monday
Widespread frost before 9am. Otherwise, sunny, with a high near 53. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 41. South wind around 10 mph.
Tuesday
Sunny, with a high near 71. Southwest wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 43. West wind around 5 mph becoming northeast after midnight.
Wednesday
Sunny, with a high near 72. Northeast wind 5 to 10 mph becoming southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 53. Southeast wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 43.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
8:32 am CDT Apr 19, 2026
Forecast Valid:
9am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation