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

60°F

16°C

Humidity 41%
Wind Speed Calm
Barometer 29.84 in (1011.3 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 16 Feb 3:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 36. Calm wind becoming east around 5 mph after midnight.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 51. East wind 5 to 15 mph, with gusts as high as 29 mph.

    High: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

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

    Low: 41 °F

    Rain Likely

  • Wednesday

    Wednesday: A 30 percent chance of rain. Mostly sunny, with a high near 55. West wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 55 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before midnight. Partly cloudy, with a low around 30. West wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 47. Calm wind becoming northeast 5 to 7 mph in the morning.

    High: 47 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain and snow likely. Mostly cloudy, with a low around 28. Northeast wind around 7 mph becoming north after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%.

    Low: 28 °F

    Rain/Snow
    Likely

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 36 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 3 to 6 mph.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 36. Calm wind becoming east around 5 mph after midnight.
Tuesday
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 51. East wind 5 to 15 mph, with gusts as high as 29 mph.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 41. East wind 6 to 11 mph becoming southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 30 percent chance of rain. Mostly sunny, with a high near 55. West wind 6 to 14 mph, with gusts as high as 22 mph.
Wednesday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 30. West wind around 6 mph becoming calm in the evening.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 47. Calm wind becoming northeast 5 to 7 mph in the morning.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 28. Northeast wind around 7 mph becoming north after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 33. Northwest wind 3 to 6 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16. Light northwest wind.
Sunday
Partly sunny, with a high near 30. Northwest wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 11. Light northwest wind.
Monday
Sunny, with a high near 32. 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:
3:16 pm CST Feb 16, 2026
Forecast Valid:
4pm CST Feb 16, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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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