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

40°F

4°C

Humidity 76%
Wind Speed Calm
Barometer 29.73 in (1007.9 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 7 Jan 5:55 pm CST
Extended Forecast for

Sparta / Fort McCoy Airport WI

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 35. Light south wind.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: Rain, mainly after 4pm. High near 43. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 43 °F

    Mostly Cloudy
    then Rain

  • Thursday Night

    Thursday Night: Rain before 4am, then rain and snow. Low around 32. Light and variable wind becoming north around 6 mph in the evening. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain then
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 39. North wind 3 to 6 mph. Chance of precipitation is 30%.

    High: 39 °F

    Chance
    Rain/Snow
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow likely. Mostly cloudy, with a high near 31. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    High: 31 °F

    Snow Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 16. Northwest wind around 8 mph, with gusts as high as 22 mph.

    Low: 16 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 28. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.

    High: 28 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. Southwest wind 3 to 5 mph.

    Low: 16 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a steady temperature around 35. Light south wind.
Thursday
Rain, mainly after 4pm. High near 43. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain before 4am, then rain and snow. Low around 32. Light and variable wind becoming north around 6 mph in the evening. Chance of precipitation is 100%. Little or no snow accumulation expected.
Friday
A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 39. North wind 3 to 6 mph. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 25. Calm wind.
Saturday
Snow likely. Mostly cloudy, with a high near 31. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 16. Northwest wind around 8 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 28. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 16. Southwest wind 3 to 5 mph.
Monday
Partly sunny, with a high near 37. West wind 5 to 7 mph.
Monday Night
Mostly cloudy, with a low around 26. West wind 3 to 6 mph.
Tuesday
A 20 percent chance of rain. Mostly cloudy, with a high near 38. West wind 3 to 6 mph.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Light and variable wind becoming northwest around 5 mph after midnight. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 32. Northwest wind 5 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta / Fort McCoy Airport WI
 43.95°N 90.72°W
Last Update:
5:16 pm CST Jan 7, 2026
Forecast Valid:
7pm CST Jan 7, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
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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