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.

Overcast

15°F

-9°C

Humidity 62%
Wind Speed Calm
Barometer 30.51 in (1035.3 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 22 Feb 9:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 5. Northwest wind 3 to 6 mph.

    Low: 5 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 24. Wind chill values as low as -1. Light and variable wind.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 12. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 18 mph.

    Low: 12 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Snow likely, mainly before noon. Mostly cloudy, with a high near 37. South wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow Likely

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 11. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.

    Low: 11 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Mostly sunny, with a high near 26. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 26 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 11. Calm wind.

    Low: 11 °F

    Chance Snow

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Partly sunny, with a high near 34. Calm wind becoming west around 5 mph.

    High: 34 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. Light southwest wind.

    Low: 19 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 5. Northwest wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 24. Wind chill values as low as -1. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 12. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 18 mph.
Tuesday
Snow likely, mainly before noon. Mostly cloudy, with a high near 37. South wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
Mostly cloudy, with a low around 11. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.
Wednesday
A 20 percent chance of snow after noon. Mostly sunny, with a high near 26. Northwest wind around 6 mph becoming calm in the afternoon.
Wednesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 11. Calm wind.
Thursday
A 20 percent chance of snow before noon. Partly sunny, with a high near 34. Calm wind becoming west around 5 mph.
Thursday Night
Mostly clear, with a low around 19. Light southwest wind.
Friday
Mostly sunny, with a high near 47. Southwest wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 20. Southwest wind around 6 mph becoming northwest after midnight.
Saturday
A 20 percent chance of snow. Partly sunny, with a high near 35. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 8. Northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 29. Calm wind becoming north around 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:
9:07 pm CST Feb 22, 2026
Forecast Valid:
10pm CST Feb 22, 2026-6pm CST Mar 1, 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