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

26°F

-3°C

Humidity 93%
Wind Speed Calm
Barometer 29.94 in (1015.5 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 12 Jan 6:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. South wind 5 to 10 mph, with gusts as high as 21 mph.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 44. Breezy, with a west wind 10 to 16 mph, with gusts as high as 31 mph.

    High: 44 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. West wind 9 to 14 mph, with gusts as high as 30 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 24. Blustery, with a north wind 11 to 16 mph, with gusts as high as 31 mph.

    High: 24 °F

    Decreasing
    Clouds and
    Blustery

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 6. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 6 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of snow after noon. Partly sunny, with a high near 26. Calm wind becoming southwest around 6 mph in the afternoon. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 20. South wind around 6 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 20 °F

    Snow Likely

  • Friday

    Friday: Snow. High near 31. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 31 °F

    Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 6. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 6 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. South wind 5 to 10 mph, with gusts as high as 21 mph.
Tuesday
Increasing clouds, with a high near 44. Breezy, with a west wind 10 to 16 mph, with gusts as high as 31 mph.
Tuesday Night
Mostly cloudy, with a low around 17. West wind 9 to 14 mph, with gusts as high as 30 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 24. Blustery, with a north wind 11 to 16 mph, with gusts as high as 31 mph.
Wednesday Night
Mostly clear, with a low around 6. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
A 40 percent chance of snow after noon. Partly sunny, with a high near 26. Calm wind becoming southwest around 6 mph in the afternoon. New snow accumulation of less than a half inch possible.
Thursday Night
Snow likely. Mostly cloudy, with a low around 20. South wind around 6 mph becoming west after midnight. Chance of precipitation is 70%.
Friday
Snow. High near 31. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 6. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 13. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around -1. Northwest wind around 6 mph, with gusts as high as 18 mph.
Sunday
Partly sunny, with a high near 14. Northwest wind 6 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 1. West wind around 6 mph.
M.L.King Day
Partly sunny, with a high near 17. Northwest wind 5 to 9 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:
5:06 pm CST Jan 12, 2026
Forecast Valid:
7pm CST Jan 12, 2026-6pm CST Jan 19, 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