National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast and Breezy

38°F

3°C

Humidity 74%
Wind Speed W 21 G 26 mph
Barometer 29.51 in (1000.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 18 Feb 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Snow, mainly before 2am. Low around 29. West wind 5 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 29 °F

    Snow

  • Thursday

    Thursday: A 20 percent chance of rain after 5pm. Partly sunny, with a high near 43. Light and variable wind becoming north 5 to 7 mph in the afternoon.

    High: 43 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Snow, possibly mixed with rain, becoming all snow after midnight. Low around 25. Northeast wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 25 °F

    Rain/Snow
    then Snow

  • Friday

    Friday: A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 34. West wind 9 to 14 mph, with gusts as high as 24 mph. New snow accumulation of around an inch possible.

    High: 34 °F

    Chance Snow
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31. Northwest wind 5 to 8 mph.

    High: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind around 6 mph.

    Low: 15 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow, mainly before 2am. Low around 29. West wind 5 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.
Thursday
A 20 percent chance of rain after 5pm. Partly sunny, with a high near 43. Light and variable wind becoming north 5 to 7 mph in the afternoon.
Thursday Night
Snow, possibly mixed with rain, becoming all snow after midnight. Low around 25. Northeast wind 5 to 8 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Friday
A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 34. West wind 9 to 14 mph, with gusts as high as 24 mph. New snow accumulation of around an inch possible.
Friday Night
Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31. Northwest wind 5 to 8 mph.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind around 6 mph.
Sunday
Mostly cloudy, with a high near 28. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 8. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph.
Monday
Mostly sunny, with a high near 29. Light northwest wind.
Monday Night
Partly cloudy, with a low around 12. Light and variable wind.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 40. South wind 5 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24. South wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.
Wednesday
A 20 percent chance of snow. Partly sunny, with a high near 39. West wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
8:41 pm CST Feb 18, 2026
Forecast Valid:
8pm CST Feb 18, 2026-6pm CST Feb 25, 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