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.

Mostly Cloudy

33°F

1°C

Humidity 93%
Wind Speed Calm
Barometer 29.91 in (1013.7 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 21 Mar 12:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 39. Calm wind.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75. Light and variable wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 3am. Partly cloudy, with a low around 40. Calm wind becoming northeast around 6 mph after midnight.

    Low: 40 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 10am. Partly sunny, with a high near 48. North wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 48 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24. North wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. Calm wind.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. Calm wind becoming south around 6 mph after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 58. West wind 5 to 8 mph.

    High: 58 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. East wind around 5 mph.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 39. Calm wind.
Saturday
Mostly sunny, with a high near 75. Light and variable wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
A 20 percent chance of showers after 3am. Partly cloudy, with a low around 40. Calm wind becoming northeast around 6 mph after midnight.
Sunday
A 20 percent chance of showers before 10am. Partly sunny, with a high near 48. North wind 6 to 9 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 24. North wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 49. Calm wind.
Monday Night
Mostly cloudy, with a low around 35. Calm wind becoming south around 6 mph after midnight.
Tuesday
Mostly cloudy, with a high near 58. West wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 34. East wind around 5 mph.
Wednesday
A slight chance of rain and snow showers before 1pm, then a slight chance of rain showers. Mostly cloudy, with a high near 53. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 40. Southeast wind around 6 mph becoming southwest after midnight.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 54. Northwest wind 6 to 13 mph.
Thursday Night
Partly cloudy, with a low around 25. North wind 7 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 45. North wind around 7 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:
1:16 am CDT Mar 21, 2026
Forecast Valid:
1am CDT Mar 21, 2026-6pm CDT Mar 27, 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