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

42°F

6°C

Humidity 78%
Wind Speed E 6 mph
Barometer 29.85 in (1012.0 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 17 Feb 8:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 53. Breezy, with an east wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 53 °F

    Mostly Cloudy
    then Slight
    Chance Rain
    and Breezy

  • Tonight

    Tonight: Rain likely, mainly before 4am. Cloudy, then gradually becoming partly cloudy, with a low around 41. Breezy, with an east wind 13 to 21 mph becoming southwest after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely
    and Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 60. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 60 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: A slight chance of rain, mixing with snow after 9pm, then gradually ending. Mostly clear, with a low around 28. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Thursday

    Thursday: A 40 percent chance of rain after noon. Mostly sunny, with a high near 49. Calm wind becoming northeast 5 to 7 mph in the morning. Winds could gust as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Sunny then
    Chance Rain

  • Thursday Night

    Thursday Night: Rain and snow likely, becoming all snow after 3am. Mostly cloudy, with a low around 28. Northeast wind around 7 mph becoming northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 28 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Snow likely, mainly before noon. Mostly cloudy, with a high near 37. West wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    High: 37 °F

    Snow Likely

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts 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 33. Northwest wind 5 to 7 mph.

    High: 33 °F

    Partly Sunny
    then Slight
    Chance Snow

Detailed Forecast

Today
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 53. Breezy, with an east wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph.
Tonight
Rain likely, mainly before 4am. Cloudy, then gradually becoming partly cloudy, with a low around 41. Breezy, with an east wind 13 to 21 mph becoming southwest after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Sunny, with a high near 60. Breezy, with a west wind 17 to 22 mph decreasing to 11 to 16 mph in the afternoon. Winds could gust as high as 34 mph.
Wednesday Night
A slight chance of rain, mixing with snow after 9pm, then gradually ending. Mostly clear, with a low around 28. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
A 40 percent chance of rain after noon. Mostly sunny, with a high near 49. Calm wind becoming northeast 5 to 7 mph in the morning. Winds could gust as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain and snow likely, becoming all snow after 3am. Mostly cloudy, with a low around 28. Northeast wind around 7 mph becoming northwest after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow likely, mainly before noon. Mostly cloudy, with a high near 37. West wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 19. West wind 5 to 8 mph, with gusts as high as 18 mph.
Saturday
A 20 percent chance of snow after noon. Partly sunny, with a high near 33. Northwest wind 5 to 7 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 14. Northwest wind around 5 mph.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 27. Northwest wind 5 to 9 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 10. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 30. Calm wind becoming northwest around 5 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:
8:31 am CST Feb 17, 2026
Forecast Valid:
9am CST Feb 17, 2026-6pm CST Feb 23, 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