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.

Fair

76°F

24°C

Humidity 54%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 8 Aug 10:55 am CDT
Extended Forecast for

6 Miles NW Tunnel City WI

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. West wind around 6 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 60. Calm wind. Chance of precipitation is 30%.

    Low: 60 °F

    Clear then
    Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 3pm. Some of the storms could produce heavy rainfall. High near 81. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Heavy Rain
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Partly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Partly sunny, with a high near 83. Calm wind.

    High: 83 °F

    Chance
    T-storms

  • Tuesday Night

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

    Low: 62 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 82 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 82. West wind around 6 mph.
Tonight
A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 60. Calm wind. Chance of precipitation is 30%.
Sunday
Showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 3pm. Some of the storms could produce heavy rainfall. High near 81. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Mostly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Calm wind.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 7am. Partly sunny, with a high near 83. Calm wind.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 57. Calm wind.
Thursday
Mostly sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 55. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76. Light northeast wind.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NW Tunnel City WI
 44.05°N 90.66°W
Last Update:
10:31 am CDT Aug 8, 2026
Forecast Valid:
12pm CDT Aug 8, 2026-6pm CDT Aug 14, 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