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

34°F

1°C

Humidity 75%
Wind Speed Calm
Barometer 29.59 in (1002.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 19 Feb 12:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 27. West wind 5 to 11 mph.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 44. Light and variable wind becoming north 5 to 7 mph in the afternoon.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Snow likely, mainly after 3am. The snow could be heavy at times. Cloudy, with a low around 25. North wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.

    Low: 25 °F

    Heavy Snow

  • Friday

    Friday: A 40 percent chance of snow before noon. Mostly cloudy, with a high near 34. West wind 10 to 15 mph, with gusts as high as 26 mph. New snow accumulation of around an inch possible.

    High: 34 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31. Northwest wind 5 to 8 mph.

    High: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind around 6 mph.

    Low: 15 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 27. West wind 5 to 11 mph.
Thursday
Partly sunny, with a high near 44. Light and variable wind becoming north 5 to 7 mph in the afternoon.
Thursday Night
Snow likely, mainly after 3am. The snow could be heavy at times. Cloudy, with a low around 25. North wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
Friday
A 40 percent chance of snow before noon. Mostly cloudy, with a high near 34. West wind 10 to 15 mph, with gusts as high as 26 mph. New snow accumulation of around an inch possible.
Friday Night
Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31. Northwest wind 5 to 8 mph.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind around 6 mph.
Sunday
Mostly cloudy, with a high near 28. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 8. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph.
Monday
Mostly sunny, with a high near 29. Light northwest wind.
Monday Night
Partly cloudy, with a low around 12. Light and variable wind.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 40. South wind 5 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24. South wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.
Wednesday
A 20 percent chance of snow. Partly sunny, with a high near 39. West wind 6 to 9 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:
12:26 am CST Feb 19, 2026
Forecast Valid:
1am CST Feb 19, 2026-6pm CST Feb 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation