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

40°F

4°C

Humidity 63%
Wind Speed Calm
Barometer 29.88 in (1013.2 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 14 Feb 5:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 51. Calm wind.

    High: 51 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight.

    Low: 37 °F

    Mostly Cloudy

  • Washington's Birthday

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

    High: 58 °F

    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. Partly sunny, with a high near 53. Light east wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

    High: 53 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 41. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    Low: 41 °F

    Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain. Mostly sunny, with a high near 54. South wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 54 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow before midnight, then a slight chance of snow. Partly cloudy, with a low around 27. West wind 5 to 7 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 27. Calm wind.
Sunday
Sunny, with a high near 51. Calm wind.
Sunday Night
Mostly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight.
Washington's Birthday
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. Partly sunny, with a high near 53. Light east wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.
Tuesday Night
Rain. Low around 41. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of rain. Mostly sunny, with a high near 54. South wind 6 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
A slight chance of rain and snow before midnight, then a slight chance of snow. Partly cloudy, with a low around 27. West wind 5 to 7 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Thursday
A chance of rain and snow after noon. Partly sunny, with a high near 41. Northwest wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 22. North wind 5 to 7 mph.
Friday
A 30 percent chance of snow. Partly sunny, with a high near 33. Northwest wind 5 to 8 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16. Light northwest wind.
Saturday
A 20 percent chance of snow. Mostly sunny, with a high near 34. West 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:
5:31 pm CST Feb 14, 2026
Forecast Valid:
6pm CST Feb 14, 2026-6pm CST Feb 21, 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