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 59%
Wind Speed Calm
Barometer 29.93 in (1014.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 18 Mar 4:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: A slight chance of rain before 2am, then a slight chance of rain and snow between 2am and 3am, then a slight chance of rain after 3am. Mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 20%.

    Low: 30 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Thursday

    Thursday: Patchy fog before noon. Otherwise, partly sunny, with a high near 47. Light and variable wind.

    High: 47 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 58. Northwest wind 3 to 5 mph.

    High: 58 °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 70. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 70 °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
A slight chance of rain before 2am, then a slight chance of rain and snow between 2am and 3am, then a slight chance of rain after 3am. Mostly cloudy, with a low around 30. Calm wind. Chance of precipitation is 20%.
Thursday
Patchy fog before noon. Otherwise, partly sunny, with a high near 47. Light and variable wind.
Thursday Night
Mostly cloudy, with a low around 36. Light and variable wind.
Friday
Partly sunny, with a high near 58. Northwest wind 3 to 5 mph.
Friday Night
Mostly cloudy, with a low around 35. Calm wind.
Saturday
Mostly sunny, with a high near 70. Calm wind becoming southwest 5 to 7 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:
3:07 pm CDT Mar 18, 2026
Forecast Valid:
5pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation