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

18°F

-8°C

Humidity 83%
Wind Speed Calm
Barometer 30.07 in (1019.9 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 21 Feb 5:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Partly sunny, with a high near 27. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 27 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of flurries before 2am, then a chance of flurries after 5am. Mostly cloudy, with a low around 12. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 12 °F

    Chance
    Flurries

  • Sunday

    Sunday: A chance of flurries before noon. Partly sunny, with a high near 23. Wind chill values as low as zero. Northwest wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 23 °F

    Chance
    Flurries

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 7. Northwest wind 3 to 8 mph. Winds could gust as high as 21 mph.

    Low: 7 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25. Light and variable wind.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. Light south wind.

    Low: 10 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow. Partly sunny, with a high near 34. Southwest wind 3 to 7 mph.

    High: 34 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 19. Light west wind.

    Low: 19 °F

    Slight Chance
    Snow

  • Wednesday

    Wednesday: A chance of snow before noon, then a chance of rain and snow. Partly sunny, with a high near 35. Northwest wind 3 to 8 mph. Chance of precipitation is 40%.

    High: 35 °F

    Chance Snow
    then Chance
    Rain/Snow

Detailed Forecast

Today
Partly sunny, with a high near 27. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Tonight
A chance of flurries before 2am, then a chance of flurries after 5am. Mostly cloudy, with a low around 12. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.
Sunday
A chance of flurries before noon. Partly sunny, with a high near 23. Wind chill values as low as zero. Northwest wind 8 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 7. Northwest wind 3 to 8 mph. Winds could gust as high as 21 mph.
Monday
Mostly sunny, with a high near 25. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 10. Light south wind.
Tuesday
A 30 percent chance of snow. Partly sunny, with a high near 34. Southwest wind 3 to 7 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 19. Light west wind.
Wednesday
A chance of snow before noon, then a chance of rain and snow. Partly sunny, with a high near 35. Northwest wind 3 to 8 mph. Chance of precipitation is 40%.
Wednesday Night
A 20 percent chance of snow. Partly cloudy, with a low around 13. Northwest wind 3 to 6 mph.
Thursday
A 20 percent chance of snow. Mostly sunny, with a high near 36. Light and variable wind becoming west around 5 mph.
Thursday Night
Partly cloudy, with a low around 20. Light southwest wind.
Friday
Mostly sunny, with a high near 46. Southwest wind 3 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
6:36 am CST Feb 21, 2026
Forecast Valid:
6am CST Feb 21, 2026-6pm CST Feb 27, 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