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.

A Few Clouds

66°F

19°C

Humidity 71%
Wind Speed W 5 mph
Barometer 29.97 in (1015.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 20 Jun 9:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: Mostly sunny, with a high near 75. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 75. Calm wind becoming east around 6 mph in the afternoon.

    High: 75 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77. Light northeast wind.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. Calm wind.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 76. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 76 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 75. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Tonight
Partly cloudy, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 75. Calm wind becoming east around 6 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 51. Calm wind.
Monday
Mostly sunny, with a high near 77. Light northeast wind.
Monday Night
Partly cloudy, with a low around 50. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. Calm wind.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 76. Calm wind becoming west 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 51. Light north wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77. Light north wind.
Thursday Night
Partly cloudy, with a low around 51. Calm wind.
Friday
Mostly sunny, with a high near 79. Calm wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.84°W
Last Update:
10:36 am CDT Jun 20, 2026
Forecast Valid:
10am CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
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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