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

-6°F

-21°C

Humidity 78%
Wind Speed Calm
Barometer 30.27 in (1028.2 mb)
Dewpoint -11°F (-24°C)
Visibility 9.00 mi
Last update 27 Jan 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a low around -3. Wind chill values as low as -11. West wind around 5 mph.

    Low: -3 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 11. Wind chill values as low as -13. West wind 5 to 9 mph, with gusts as high as 18 mph.

    High: 11 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around -8. Wind chill values as low as -15. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: -8 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 11. Wind chill values as low as -7. Light northwest wind.

    High: 11 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around -8. Calm wind.

    Low: -8 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 13. Calm wind becoming north around 6 mph in the morning.

    High: 13 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around -3. Light northwest wind.

    Low: -3 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 21. Calm wind.

    High: 21 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 3. Calm wind.

    Low: 3 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around -3. Wind chill values as low as -11. West wind around 5 mph.
Wednesday
Sunny, with a high near 11. Wind chill values as low as -13. West wind 5 to 9 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around -8. Wind chill values as low as -15. Northwest wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 11. Wind chill values as low as -7. Light northwest wind.
Thursday Night
Mostly clear, with a low around -8. Calm wind.
Friday
Sunny, with a high near 13. Calm wind becoming north around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around -3. Light northwest wind.
Saturday
Sunny, with a high near 21. Calm wind.
Saturday Night
Partly cloudy, with a low around 3. Calm wind.
Sunday
A 40 percent chance of snow. Partly sunny, with a high near 25. Calm wind becoming southwest around 5 mph.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 12. Calm wind.
Monday
Partly sunny, with a high near 26. Light northwest wind.
Monday Night
Mostly cloudy, with a low around 7. Calm wind.
Tuesday
A 20 percent chance of snow. Partly sunny, with a high near 27. Calm wind becoming southeast around 5 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:
5:26 pm CST Jan 27, 2026
Forecast Valid:
8pm CST Jan 27, 2026-6pm CST Feb 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation