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

22°F

-6°C

Humidity 94%
Wind Speed Calm
Barometer 29.70 in (1007.0 mb)
Dewpoint 21°F (-6°C)
Visibility 9.00 mi
Last update 8 Jan 3:55 am CST
Extended Forecast for

Sparta / Fort McCoy Airport WI

  • Today

    Today: Rain, mainly after 2pm. High near 43. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 43 °F

    Partly Sunny
    then Rain

  • Tonight

    Tonight: Rain and snow, possibly mixed with sleet before 3am, then snow likely, possibly mixed with rain. Low around 32. Calm wind becoming north 5 to 7 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New snow and sleet accumulation of less than a half inch possible.

    Low: 32 °F

    Rain then
    Wintry Mix

  • Friday

    Friday: A slight chance of rain and snow before 7am, then a slight chance of snow between 7am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 38. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Cloudy

  • 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 20 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 17. Northwest wind around 8 mph, with gusts as high as 22 mph. New snow accumulation of less than one inch possible.

    Low: 17 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 28. Northwest wind 5 to 7 mph, with gusts as high as 18 mph.

    High: 28 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 17. Southwest wind 3 to 5 mph.

    Low: 17 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39. West wind 5 to 7 mph.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly after 2pm. High near 43. Light and variable wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain and snow, possibly mixed with sleet before 3am, then snow likely, possibly mixed with rain. Low around 32. Calm wind becoming north 5 to 7 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New snow and sleet accumulation of less than a half inch possible.
Friday
A slight chance of rain and snow before 7am, then a slight chance of snow between 7am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 38. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 24. 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 20 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 17. Northwest wind around 8 mph, with gusts as high as 22 mph. New snow accumulation of less than one inch possible.
Sunday
Partly sunny, with a high near 28. Northwest wind 5 to 7 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 17. Southwest wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 39. West wind 5 to 7 mph.
Monday Night
Mostly cloudy, with a low around 28. West wind 3 to 5 mph.
Tuesday
A 30 percent chance of rain. Mostly cloudy, with a high near 39. Southwest wind 3 to 6 mph.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 31. Northwest wind 5 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta / Fort McCoy Airport WI
 43.95°N 90.72°W
Last Update:
4:59 am CST Jan 8, 2026
Forecast Valid:
5am CST Jan 8, 2026-6pm CST Jan 14, 2026
 
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Additional Resources

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Chance of Precipitation