Areas of Excessive Rainfall and Severe Thunderstorms; Fire Weather Concerns in the Northern Plains and Four Corners Region

Widespread showers and thunderstorms may bring areas of flash flooding across much of the Southern Plains into the Gulf Coast region and the upper Ohio River Valley into the Mid-Atlantic. A large Pacific storm will bring widespread rain, gusty winds, and mountain snow to California and the Great Basin. Fire weather concerns expected in the Northern Plains and the Four Corners region. Read More >

Hazardous Weather Conditions

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Fair

64°F

18°C

Humidity 64%
Wind Speed N 9 G 17 mph
Barometer 30.01 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 26 May 11:55 pm CDT
Extended Forecast for

Oconomowoc WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 83. Light and variable wind becoming northeast 5 to 10 mph in the afternoon.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm.  Partly cloudy, with a low around 52. Northeast wind around 10 mph.  Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. East wind 5 to 10 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47. East wind around 5 mph becoming calm  in the evening.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82. Calm wind becoming northwest around 5 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79. Light northeast wind becoming east 5 to 10 mph in the morning.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 59. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 83. Light and variable wind becoming northeast 5 to 10 mph in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Partly cloudy, with a low around 52. Northeast wind around 10 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 75. East wind 5 to 10 mph.
Thursday Night
Clear, with a low around 47. East wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 82. Calm wind becoming northwest around 5 mph.
Friday Night
Mostly clear, with a low around 54. Calm wind.
Saturday
Sunny, with a high near 79. Light northeast wind becoming east 5 to 10 mph in the morning.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 51.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Oconomowoc WI
 43.11°N 88.48°W (Elev. 899 ft)
8:46 pm CDT May 26, 2026
12am CDT May 27, 2026-6pm CDT Jun 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database