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

Significant Coastal Impacts to the Eastern Seaboard; Tropical Storm Nolo to Impact Hawaii

A Nor'easter will bring significant coastal impacts to the Mid-Atlantic and New England through the weekend. Moderate to major coastal flooding, heavy rain, strong winds and high surf expected. Tropical Storm Nolo will continue to strengthen as it moves north toward the Big Island of Hawaii. Heavy rainfall may bring life-threatening, catastrophic flooding and mudslides through the weekend. Read More >

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Fair

59°F

15°C

Humidity 82%
Wind Speed E 6 mph
Barometer 30.33 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 24 Sep 7:45 pm CDT
Extended Forecast for

Lannon WI

  • Tonight

    Tonight: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.

    High: 67 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. East wind around 5 mph becoming calm.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68. Calm wind.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70. Calm wind becoming southeast around 5 mph.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. Calm wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 50. East wind around 5 mph becoming calm.
Saturday
Mostly sunny, with a high near 67. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 50. Calm wind.
Sunday
Partly sunny, with a high near 68. Calm wind.
Sunday Night
Partly cloudy, with a low around 50. Calm wind.
Monday
Mostly sunny, with a high near 70. Calm wind becoming southeast around 5 mph.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 69.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 67.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 58.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lannon WI
 43.14°N 88.18°W (Elev. 912 ft)
Last Update:
2:31 pm CDT Sep 24, 2026
Forecast Valid:
8pm CDT Sep 24, 2026-6pm CDT Oct 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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