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

26°F

-3°C

Humidity 73%
Wind Speed W 10 mph
Barometer 29.89 in (1013.7 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 20 Feb 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 16. West wind 3 to 8 mph.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of flurries, mainly after midnight. 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: Partly sunny, with a high near 24. Wind chill values as low as zero. Northwest wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 24 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8. Northwest wind 5 to 9 mph, with gusts as high as 21 mph.

    Low: 8 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 26. North wind around 5 mph becoming calm in the afternoon.

    High: 26 °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 36. South wind 5 to 8 mph.

    High: 36 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 18. West wind 3 to 5 mph.

    Low: 18 °F

    Slight Chance
    Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 16. West wind 3 to 8 mph.
Saturday
Partly sunny, with a high near 28. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
A chance of flurries, mainly after midnight. Mostly cloudy, with a low around 12. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 24. Wind chill values as low as zero. Northwest wind 8 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly cloudy, with a low around 8. Northwest wind 5 to 9 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 26. North wind around 5 mph becoming calm in the afternoon.
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 36. South wind 5 to 8 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 18. West wind 3 to 5 mph.
Wednesday
A 30 percent chance of snow. Partly sunny, with a high near 35. Northwest wind 3 to 7 mph.
Wednesday Night
A 20 percent chance of snow. Partly cloudy, with a low around 12. Northwest wind around 6 mph becoming calm in the evening.
Thursday
A 20 percent chance of snow. Mostly sunny, with a high near 37. Calm wind becoming west around 5 mph.
Thursday Night
Mostly clear, with a low around 20. Light southwest wind.
Friday
Mostly sunny, with a high near 47. Southwest wind 3 to 7 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:
8:46 pm CST Feb 20, 2026
Forecast Valid:
8pm CST Feb 20, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

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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