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

36°F

2°C

Humidity 97%
Wind Speed Calm
Barometer 29.77 in (1009.0 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 20 Mar 7:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: Partly sunny, with a high near 57. Calm wind becoming northwest around 6 mph.

    High: 57 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 43. Calm wind becoming north around 6 mph after midnight.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 6 to 11 mph.

    High: 50 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25. North wind around 6 mph becoming calm in the evening.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 49. Light and variable wind.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55. South wind 5 to 7 mph becoming west in the afternoon.

    High: 55 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 57. Calm wind becoming northwest around 6 mph.
Tonight
Mostly cloudy, with a low around 38. Calm wind.
Saturday
Mostly sunny, with a high near 73. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 43. Calm wind becoming north around 6 mph after midnight.
Sunday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 6 to 11 mph.
Sunday Night
Partly cloudy, with a low around 25. North wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 49. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 55. South wind 5 to 7 mph becoming west in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 31. Light and variable wind becoming northeast around 5 mph after midnight.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 52. South wind 5 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 37. South wind around 7 mph.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 54. Northwest wind 7 to 14 mph, with gusts as high as 22 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:
8:47 am CDT Mar 20, 2026
Forecast Valid:
8am CDT Mar 20, 2026-6pm CDT Mar 26, 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