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

15°F

-9°C

Humidity 77%
Wind Speed Calm
Barometer 30.44 in (1032.8 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 1 Mar 8:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 18. Light southeast wind.

    Low: 18 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 41. South wind 3 to 7 mph. Winds could gust as high as 18 mph.

    High: 41 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A chance of rain between midnight and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 29. Calm wind. Chance of precipitation is 30%.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: A 40 percent chance of rain, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 45. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow after midnight. Partly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly before noon. Mostly sunny, with a high near 45. Light east wind.

    High: 45 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 50. Calm wind becoming east around 5 mph.

    High: 50 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 36. Southeast wind 3 to 5 mph.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a steady temperature around 18. Light southeast wind.
Monday
Increasing clouds, with a high near 41. South wind 3 to 7 mph. Winds could gust as high as 18 mph.
Monday Night
A chance of rain between midnight and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 29. Calm wind. Chance of precipitation is 30%.
Tuesday
A 40 percent chance of rain, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 45. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 20 percent chance of snow after midnight. Partly cloudy, with a low around 28. Calm wind.
Wednesday
A 30 percent chance of rain, mainly before noon. Mostly sunny, with a high near 45. Light east wind.
Wednesday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 32. Calm wind.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 50. Calm wind becoming east around 5 mph.
Thursday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 36. Southeast wind 3 to 5 mph.
Friday
Rain. High near 59. Southeast wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 29. West wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 53. West wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 31. Southwest wind around 6 mph.
Sunday
Sunny, with a high near 61. Southwest wind 6 to 11 mph, with gusts as high as 20 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:
5:21 pm CST Mar 1, 2026
Forecast Valid:
9pm CST Mar 1, 2026-6pm CDT Mar 8, 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