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.

A Few Clouds

15°F

-9°C

Humidity 64%
Wind Speed NW 9 mph
Barometer 30.29 in (1027.5 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 22 Feb 2:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 13. Wind chill values as low as -1. North wind around 10 mph, with gusts as high as 24 mph.

    Low: 13 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of flurries between 8am and 3pm. Partly sunny, with a high near 19. Wind chill values as low as -5. Blustery, with a north wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 19 °F

    Chance
    Flurries and
    Blustery

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 4. Wind chill values as low as -3. Northwest wind 5 to 9 mph, with gusts as high as 21 mph.

    Low: 4 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25. Wind chill values as low as -3. Light and variable wind.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. Calm wind becoming south around 6 mph after midnight.

    Low: 10 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Snow likely, mainly after noon. Partly sunny, with a high near 35. South wind 6 to 9 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 35 °F

    Snow Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14. West wind around 7 mph.

    Low: 14 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Mostly sunny, with a high near 30. Northwest wind 3 to 6 mph.

    High: 30 °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

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 13. Wind chill values as low as -1. North wind around 10 mph, with gusts as high as 24 mph.
Sunday
A chance of flurries between 8am and 3pm. Partly sunny, with a high near 19. Wind chill values as low as -5. Blustery, with a north wind 10 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 4. Wind chill values as low as -3. Northwest wind 5 to 9 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 25. Wind chill values as low as -3. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 10. Calm wind becoming south around 6 mph after midnight.
Tuesday
Snow likely, mainly after noon. Partly sunny, with a high near 35. South wind 6 to 9 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Tuesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 14. West wind around 7 mph.
Wednesday
A 20 percent chance of snow after noon. Mostly sunny, with a high near 30. Northwest wind 3 to 6 mph.
Wednesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 11. Calm wind.
Thursday
A 30 percent chance of snow, mainly before noon. Mostly 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. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 22. 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.
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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:
1:41 am CST Feb 22, 2026
Forecast Valid:
3am CST Feb 22, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
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Additional Resources

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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