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.

Mostly Cloudy

82°F

28°C

Humidity 50%
Wind Speed Calm
Barometer 30.03 in (1017.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 6 Aug 4:55 pm CDT
Extended Forecast for

5 Miles SSW Tunnel City WI

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 61. South wind 3 to 6 mph.

    Low: 61 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 4pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 84. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 84 °F

    Areas Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 58. West wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 58 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.

    High: 82 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 10pm. Partly cloudy, with a low around 62. Light south wind. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 82. Calm wind becoming south around 5 mph in the afternoon.

    High: 82 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 61. South wind 3 to 6 mph.
Friday
A 20 percent chance of showers and thunderstorms after 4pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 84. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 58. West wind 3 to 8 mph. Winds could gust as high as 20 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
A chance of showers, with thunderstorms also possible after 10pm. Partly cloudy, with a low around 62. Light south wind. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Calm wind.
Monday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 82. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 62. Calm wind.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 81. Calm wind.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 58. Light northwest wind.
Thursday
Mostly sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Tunnel City WI
 43.95°N 90.6°W
Last Update:
4:11 pm CDT Aug 6, 2026
Forecast Valid:
5pm CDT Aug 6, 2026-6pm CDT Aug 13, 2026
 
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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