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

11°F

-12°C

Humidity 48%
Wind Speed Calm
Barometer 30.10 in (1022.4 mb)
Dewpoint -5°F (-21°C)
Visibility 10.00 mi
Last update 4 Dec 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a temperature rising to around 14 by 1am. Wind chill values as low as -3. Southwest wind 6 to 8 mph, with gusts as high as 24 mph.

    Low: 9 °F⇑

    Mostly Cloudy

  • Friday

    Friday: Snow likely, mainly after 3pm. Mostly cloudy, with a high near 29. Southwest wind around 6 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Slight Chance
    Snow then
    Snow Likely

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 10. West wind around 5 mph becoming calm after midnight.

    Low: 10 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 21. Calm wind.

    High: 21 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 6. Calm wind. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 6 °F

    Snow Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 17. Calm wind becoming north around 5 mph.

    High: 17 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -8. Calm wind.

    Low: -8 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 22. Calm wind becoming south around 6 mph in the afternoon.

    High: 22 °F

    Partly Sunny
    then Chance
    Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. South wind around 6 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 11 °F

    Snow Likely

Detailed Forecast

Tonight
Mostly cloudy, with a temperature rising to around 14 by 1am. Wind chill values as low as -3. Southwest wind 6 to 8 mph, with gusts as high as 24 mph.
Friday
Snow likely, mainly after 3pm. Mostly cloudy, with a high near 29. Southwest wind around 6 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 10. West wind around 5 mph becoming calm after midnight.
Saturday
Partly sunny, with a high near 21. Calm wind.
Saturday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 6. Calm wind. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Sunday
Mostly sunny, with a high near 17. Calm wind becoming north around 5 mph.
Sunday Night
Partly cloudy, with a low around -8. Calm wind.
Monday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 22. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. South wind around 6 mph becoming west after midnight. Chance of precipitation is 70%.
Tuesday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 29. West wind 3 to 6 mph.
Tuesday Night
Snow. Low around 14. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of snow. Mostly cloudy, with a high near 27. Northwest wind 6 to 9 mph, with gusts as high as 18 mph.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 2. Northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 21. Northwest wind 3 to 6 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:
5:36 pm CST Dec 4, 2025
Forecast Valid:
8pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation