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

27°F

-3°C

Humidity 74%
Wind Speed Calm
Barometer 30.11 in (1021.2 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 11 Jan 10:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Southwest wind 6 to 10 mph, with gusts as high as 24 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. Southwest wind 5 to 8 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 30. Calm wind becoming southwest around 5 mph after midnight.

    Low: 30 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 45. West wind 8 to 15 mph, with gusts as high as 26 mph.

    High: 45 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain and snow between midnight and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 22. West wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before noon. Partly sunny, with a high near 28. Blustery, with a north wind 13 to 18 mph, with gusts as high as 33 mph.

    High: 28 °F

    Blustery.
    Chance Snow
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph.

    Low: 9 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Calm wind becoming south around 5 mph in the afternoon.

    High: 27 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 21. South wind 3 to 5 mph. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. Southwest wind 6 to 10 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 42. Southwest wind 5 to 8 mph.
Monday Night
Increasing clouds, with a low around 30. Calm wind becoming southwest around 5 mph after midnight.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 45. West wind 8 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of rain and snow between midnight and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 22. West wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of snow before noon. Partly sunny, with a high near 28. Blustery, with a north wind 13 to 18 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 9. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph.
Thursday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Snow likely. Mostly cloudy, with a low around 21. South wind 3 to 5 mph. Chance of precipitation is 60%.
Friday
Snow likely. Mostly cloudy, with a high near 30. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 10. Northwest wind around 6 mph.
Saturday
A 20 percent chance of snow. Mostly cloudy, with a high near 19. Northwest wind 6 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 5. West wind around 6 mph.
Sunday
Partly sunny, with a high near 22. West wind 6 to 9 mph, with gusts as high as 18 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:
8:37 pm CST Jan 11, 2026
Forecast Valid:
11pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation