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

Significant Heat in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

A significant late season heat wave continues in the interior Pacific Northwest for at least one more day before easing somewhat Friday into Saturday. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Partly Cloudy

61°F

16°C

Humidity 52%
Wind Speed SW 12 G 16 mph
Barometer 29.73 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 4 Sep 5:45 pm CDT
Extended Forecast for

Merton WI

  • Tonight

    Tonight: Showers likely, mainly between midnight and 2am. Mostly cloudy, with a low around 50. South wind 5 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 59. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 59 °F

    Decreasing
    Clouds and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. West wind 5 to 10 mph.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 63. West wind 5 to 10 mph.

    High: 63 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 42. West wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 63. Northwest wind 5 to 10 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. Northwest wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 67. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly between midnight and 2am. Mostly cloudy, with a low around 50. South wind 5 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 59. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.
Friday Night
Mostly clear, with a low around 42. West wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 63. West wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 42. West wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 63. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 42. Northwest wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 67. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 49.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 71.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 73.
Wednesday Night
Mostly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merton WI
 43.12°N 88.33°W (Elev. 968 ft)
Last Update:
6:08 pm CDT Sep 4, 2025
Forecast Valid:
6pm CDT Sep 4, 2025-6pm CDT Sep 11, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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