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.

Overcast

24°F

-4°C

Humidity 62%
Wind Speed Calm
Barometer 30.30 in (1028.5 mb)
Dewpoint 13°F (-11°C)
Visibility 9.00 mi
Last update 4 Feb 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: A 50 percent chance of snow, mainly after 4am. Increasing clouds, with a low around 12. Light and variable wind. Total nighttime snow accumulation of less than a half inch possible.

    Low: 12 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: Snow likely, possibly mixing with freezing rain after 8am, then gradually ending. Mostly cloudy, with a high near 37. Southwest wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Wintry Mix
    Likely then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of snow between midnight and 3am, then a slight chance of freezing rain after 3am. Mostly cloudy, with a low around 27. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Wintry
    Mix

  • Friday

    Friday: Mostly cloudy, with a high near 38. Breezy, with a northwest wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 38 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 5. North wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 5 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 25. Calm wind becoming south around 5 mph.

    High: 25 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18. Light southeast wind.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 38. Light southeast wind.

    High: 38 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 50 percent chance of snow, mainly after 4am. Increasing clouds, with a low around 12. Light and variable wind. Total nighttime snow accumulation of less than a half inch possible.
Thursday
Snow likely, possibly mixing with freezing rain after 8am, then gradually ending. Mostly cloudy, with a high near 37. Southwest wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.
Thursday Night
A slight chance of snow between midnight and 3am, then a slight chance of freezing rain after 3am. Mostly cloudy, with a low around 27. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy, with a high near 38. Breezy, with a northwest wind 9 to 16 mph, with gusts as high as 28 mph.
Friday Night
Mostly clear, with a low around 5. North wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Saturday
Partly sunny, with a high near 25. Calm wind becoming south around 5 mph.
Saturday Night
Mostly cloudy, with a low around 18. Light southeast wind.
Sunday
Partly sunny, with a high near 38. Light southeast wind.
Sunday Night
Partly cloudy, with a low around 23. Calm wind.
Monday
Partly sunny, with a high near 46. Calm wind becoming southwest around 5 mph.
Monday Night
Mostly cloudy, with a low around 28. Calm wind.
Tuesday
A 20 percent chance of rain. Mostly cloudy, with a high near 44. Calm wind becoming southeast around 6 mph in the morning.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 26. Light northeast wind.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 38. Calm wind becoming north around 6 mph in the morning.
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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:
7:53 pm CST Feb 4, 2026
Forecast Valid:
8pm CST Feb 4, 2026-6pm CST Feb 11, 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