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

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

A Few Clouds

87°F

31°C

Humidity 64%
Wind Speed Calm
Barometer 29.83 in (1009.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 11 Aug 4:55 pm CDT
Extended Forecast for

Sparta / Fort McCoy Airport WI

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 87. Calm wind.

    High: 87 °F

    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 83. Calm wind.

    High: 83 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. Light east wind.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 81. East wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 81 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. East wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 59 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Southeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 63. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 87. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 64. Calm wind.
Thursday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 83. Calm wind.
Thursday Night
Partly cloudy, with a low around 60. Light east wind.
Friday
Mostly sunny, with a high near 81. East wind 5 to 9 mph, with gusts as high as 18 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. East wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Southeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 81. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Light northwest wind.
Monday
Mostly sunny, with a high near 80. Calm wind.
Monday Night
Partly cloudy, with a low around 58. Calm wind.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta / Fort McCoy Airport WI
 43.95°N 90.72°W
Last Update:
5:26 pm CDT Aug 11, 2026
Forecast Valid:
5pm CDT Aug 11, 2026-6pm CDT Aug 18, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation