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.

Fog/Mist

59°F

15°C

Humidity 98%
Wind Speed Calm
Barometer 29.97 in (1014.9 mb)
Dewpoint 59°F (15°C)
Visibility 5.00 mi
Last update 8 Aug 2:55 am CDT
Extended Forecast for

3 Miles N Sparta / Fort McCoy Airport WI

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 8am. Mostly cloudy, with a high near 83. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 83 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming northwest around 6 mph in the afternoon.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 61. Calm wind.
Sunday
Showers and thunderstorms likely, mainly before 8am. Mostly cloudy, with a high near 83. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 85. Calm wind.
Monday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Calm wind.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Wednesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 83. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 58. Calm wind.
Thursday
Partly sunny, with a high near 80. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 55. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77. Light and variable wind.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Sparta / Fort McCoy Airport WI
 44.01°N 90.75°W
Last Update:
1:26 am CDT Aug 8, 2026
Forecast Valid:
4am 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