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

26°F

-3°C

Humidity 47%
Wind Speed W 6 mph
Barometer 29.73 in (1008.3 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 25 Feb 3:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 8. Light and variable wind.

    Low: 8 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24. Southwest wind around 5 mph becoming calm.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 47. Southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 18. Northwest wind 5 to 7 mph, with gusts as high as 20 mph.

    Low: 18 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow. Mostly cloudy, with a high near 26. Northwest wind 3 to 6 mph. New snow accumulation of less than one inch possible.

    High: 26 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 5. Light north wind.

    Low: 5 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 25. Light east wind.

    High: 25 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 10. Calm wind.

    Low: 10 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 8. Light and variable wind.
Thursday
Partly sunny, with a high near 38. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 24. Southwest wind around 5 mph becoming calm.
Friday
Mostly sunny, with a high near 47. Southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 18. Northwest wind 5 to 7 mph, with gusts as high as 20 mph.
Saturday
A 50 percent chance of snow. Mostly cloudy, with a high near 26. Northwest wind 3 to 6 mph. New snow accumulation of less than one inch possible.
Saturday Night
Partly cloudy, with a low around 5. Light north wind.
Sunday
Partly sunny, with a high near 25. Light east wind.
Sunday Night
Mostly clear, with a low around 10. Calm wind.
Monday
Mostly sunny, with a high near 36. Calm wind becoming south around 6 mph in the morning.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 20. Light south wind.
Tuesday
A 30 percent chance of snow. Mostly sunny, with a high near 41. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 23. Light west wind.
Wednesday
Sunny, with a high near 46. Calm wind becoming south 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:
1:21 pm CST Feb 25, 2026
Forecast Valid:
4pm CST Feb 25, 2026-6pm CST Mar 4, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation