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

-19°F

-28°C

Humidity 74%
Wind Speed Calm
Barometer 30.32 in (1030.3 mb)
Dewpoint -25°F (-32°C)
Visibility 10.00 mi
Last update 29 Jan 5:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Sunny, with a high near 12. Wind chill values as low as -15. Calm wind.

    High: 12 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around -5. Calm wind.

    Low: -5 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 14. Wind chill values as low as -11. Calm wind becoming north 5 to 7 mph in the morning.

    High: 14 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around -2. Light northwest wind.

    Low: -2 °F

    Mostly Clear

  • 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. Light south wind.

    Low: 3 °F

    Partly Cloudy

  • Sunday

    Sunday: A 50 percent chance of snow. Partly sunny, with a high near 25. Southwest wind 3 to 7 mph.

    High: 25 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Calm wind.

    Low: 15 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 29. Calm wind becoming northwest around 6 mph.

    High: 29 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 12. Wind chill values as low as -15. Calm wind.
Tonight
Partly cloudy, with a low around -5. Calm wind.
Friday
Mostly sunny, with a high near 14. Wind chill values as low as -11. Calm wind becoming north 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around -2. Light northwest wind.
Saturday
Sunny, with a high near 21. Calm wind.
Saturday Night
Partly cloudy, with a low around 3. Light south wind.
Sunday
A 50 percent chance of snow. Partly sunny, with a high near 25. Southwest wind 3 to 7 mph.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Calm wind.
Monday
Partly sunny, with a high near 29. Calm wind becoming northwest around 6 mph.
Monday Night
Mostly cloudy, with a low around 9. Calm wind.
Tuesday
A 20 percent chance of snow. Partly sunny, with a high near 26. Light northeast wind.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 11. Calm wind.
Wednesday
A 30 percent chance of snow. Partly sunny, with a high near 27. Light west wind.
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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:
5:57 am CST Jan 29, 2026
Forecast Valid:
6am CST Jan 29, 2026-6pm CST Feb 4, 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