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.

Mostly Cloudy

55°F

13°C

Humidity 54%
Wind Speed E 9 G 22 mph
Barometer 29.67 in (1005.6 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 17 Feb 2:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Rain and thunderstorms before 4am, then a chance of rain between 4am and 5am. Low around 43. East wind 9 to 15 mph becoming south after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: A slight chance of rain between 11am and noon. Mostly sunny, with a high near 56. Breezy, with a west wind 13 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    High: 56 °F

    Breezy.
    Slight Chance
    Rain then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 29. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 47. Calm wind becoming north around 6 mph in the morning.

    High: 47 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain before 9pm, then rain and snow likely between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 26. Northeast wind around 7 mph becoming northwest after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 26 °F

    Rain/Snow
    Likely

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 35. Northwest wind 7 to 11 mph, with gusts as high as 20 mph. New snow accumulation of around an inch possible.

    High: 35 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 19. West wind 3 to 7 mph. Winds could gust as high as 18 mph.

    Low: 19 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Partly sunny, with a high near 34. Northwest wind 3 to 8 mph.

    High: 34 °F

    Partly Sunny
    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

Detailed Forecast

Tonight
Rain and thunderstorms before 4am, then a chance of rain between 4am and 5am. Low around 43. East wind 9 to 15 mph becoming south after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A slight chance of rain between 11am and noon. Mostly sunny, with a high near 56. Breezy, with a west wind 13 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 29. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 47. Calm wind becoming north around 6 mph in the morning.
Thursday Night
A chance of rain before 9pm, then rain and snow likely between 9pm and 3am, then snow likely after 3am. Mostly cloudy, with a low around 26. Northeast wind around 7 mph becoming northwest after midnight. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 35. Northwest wind 7 to 11 mph, with gusts as high as 20 mph. New snow accumulation of around an inch possible.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 19. West wind 3 to 7 mph. Winds could gust as high as 18 mph.
Saturday
A 20 percent chance of snow after noon. Partly sunny, with a high near 34. Northwest wind 3 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
Partly sunny, with a high near 28. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 9. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 29. Light north wind.
Monday Night
Partly cloudy, with a low around 14. Calm wind becoming southeast around 6 mph after midnight.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 37. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
3:11 pm CST Feb 17, 2026
Forecast Valid:
3pm CST Feb 17, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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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