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

32°F

0°C

Humidity 87%
Wind Speed Calm
Barometer 29.93 in (1014.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 15 Feb 8:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Sunny, with a high near 55. Calm wind.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight.

    Low: 37 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 58. Southwest wind around 6 mph becoming calm in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 51. East wind 5 to 15 mph, with gusts as high as 26 mph.

    High: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 41. East wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Wednesday

    Wednesday: A 50 percent chance of rain. Mostly sunny, with a high near 53. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

    High: 53 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before midnight, then a slight chance of snow. Partly cloudy, with a low around 28. West wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Thursday

    Thursday: A chance of rain and snow after noon. Mostly sunny, with a high near 43. Light and variable wind becoming northwest 5 to 8 mph in the morning. Chance of precipitation is 30%.

    High: 43 °F

    Mostly Sunny
    then Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 55. Calm wind.
Tonight
Partly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight.
Washington's Birthday
Mostly sunny, with a high near 58. Southwest wind around 6 mph becoming calm in the afternoon.
Monday Night
Partly cloudy, with a low around 34. Light and variable wind.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 51. East wind 5 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 41. East wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of rain. Mostly sunny, with a high near 53. South wind 6 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
A chance of rain and snow before midnight, then a slight chance of snow. Partly cloudy, with a low around 28. West wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Thursday
A chance of rain and snow after noon. Mostly sunny, with a high near 43. Light and variable wind becoming northwest 5 to 8 mph in the morning. Chance of precipitation is 30%.
Thursday Night
A chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 24. North wind around 7 mph. Chance of precipitation is 50%.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 33. Northwest wind 6 to 9 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16. Northwest wind 3 to 5 mph.
Saturday
Partly sunny, with a high near 30. Northwest wind 3 to 6 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:
6:06 am CST Feb 15, 2026
Forecast Valid:
9am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation