National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Fair

41°F

5°C

Humidity 61%
Wind Speed Calm
Barometer 29.96 in (1015.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 18 Mar 6:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before noon. Otherwise, partly sunny, with a high near 48. Light east wind.

    High: 48 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. Calm wind becoming south around 5 mph after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Friday

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

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. West wind around 7 mph becoming northeast after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. Northeast wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22. North wind 3 to 6 mph.

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. Calm wind.
Thursday
Patchy fog before noon. Otherwise, partly sunny, with a high near 48. Light east wind.
Thursday Night
Mostly cloudy, with a low around 36. Calm wind becoming south around 5 mph after midnight.
Friday
Partly sunny, with a high near 57. Calm wind becoming northwest around 6 mph.
Friday Night
Mostly cloudy, with a low around 35. Calm wind.
Saturday
Mostly sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 35. West wind around 7 mph becoming northeast after midnight.
Sunday
Mostly cloudy, with a high near 46. Northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 22. North wind 3 to 6 mph.
Monday
Sunny, with a high near 45. Light and variable wind becoming southeast around 6 mph in the morning.
Monday Night
Mostly cloudy, with a low around 29. South wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 52. Southwest wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 32. Light and variable wind becoming southeast around 5 mph after midnight.
Wednesday
A slight chance of rain and snow. Mostly cloudy, with a high near 56. South wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
6:16 pm CDT Mar 18, 2026
Forecast Valid:
7pm CDT Mar 18, 2026-6pm CDT Mar 25, 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