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

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Mostly Cloudy

78°F

26°C

Humidity 92%
Wind Speed Calm
Barometer 29.95 in (1014.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 1 Sep 10:55 am CDT
Extended Forecast for

Wilton WI

  • Today

    Today: Partly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 91 °F

    Partly Sunny

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 68. Calm wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 10 percent chance of showers and thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 89. Calm wind becoming west around 6 mph in the afternoon.

    High: 89 °F

    Slight Chance
    T-storms then
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Partly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Light southeast wind.

    High: 88 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 68. Calm wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 10 percent chance of showers and thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 89. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Calm wind.
Thursday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Partly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph.
Friday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Light southeast wind.
Saturday Night
A 40 percent chance of showers. Partly cloudy, with a low around 66. Light southeast wind.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 85. Calm wind becoming east 5 to 7 mph in the afternoon.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62. East wind around 6 mph becoming calm in the evening.
Labor Day
A 20 percent chance of showers. Partly sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wilton WI
 43.81°N 90.52°W
Last Update:
11:16 am CDT Sep 1, 2026
Forecast Valid:
11am CDT Sep 1, 2026-6pm CDT Sep 7, 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