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

29°F

-2°C

Humidity 80%
Wind Speed Calm
Barometer 29.88 in (1013.3 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 15 Feb 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 36. Calm wind becoming south around 6 mph after midnight.

    Low: 36 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 56. Southwest wind around 6 mph becoming calm in the afternoon.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. Calm wind becoming east around 5 mph after midnight.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. East wind 5 to 14 mph, with gusts as high as 25 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely. Mostly cloudy, with a low around 41. East wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain Likely

  • Wednesday

    Wednesday: A 40 percent chance of rain. Mostly sunny, with a high near 53. West wind 6 to 14 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before midnight. Mostly clear, with a low around 28. West wind 3 to 7 mph. Winds could gust as high as 18 mph.

    Low: 28 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 47. Light and variable wind becoming north 5 to 7 mph in the morning.

    High: 47 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain and snow. Mostly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%.

    Low: 25 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 36. Calm wind becoming south around 6 mph after midnight.
Washington's Birthday
Sunny, with a high near 56. Southwest wind around 6 mph becoming calm in the afternoon.
Monday Night
Partly cloudy, with a low around 33. Calm wind becoming east around 5 mph after midnight.
Tuesday
Mostly cloudy, with a high near 52. East wind 5 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 41. East wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 40 percent chance of rain. Mostly sunny, with a high near 53. West wind 6 to 14 mph, with gusts as high as 22 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of rain before midnight. Mostly clear, with a low around 28. West wind 3 to 7 mph. Winds could gust as high as 18 mph.
Thursday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 47. Light and variable wind becoming north 5 to 7 mph in the morning.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 35. West wind 6 to 9 mph, with gusts as high as 18 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 18. Northwest wind 5 to 7 mph.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 33. Northwest wind 5 to 7 mph.
Saturday Night
A 20 percent chance of snow. Partly cloudy, with a low around 13. Northwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 29. Northwest wind 3 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
5:16 pm CST Feb 15, 2026
Forecast Valid:
8pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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