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.

Overcast

29°F

-2°C

Humidity 74%
Wind Speed Calm
Barometer 30.31 in (1027.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 23 Mar 3:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: Sunny, with a high near 48. Calm wind.

    High: 48 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Calm wind becoming south around 5 mph after midnight.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. Southwest wind 3 to 6 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Light south wind.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64. Southwest wind 3 to 6 mph.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 62. Calm wind becoming north 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 62 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25. North wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44. North wind 5 to 8 mph.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 48. Calm wind.
Tonight
Increasing clouds, with a low around 33. Calm wind becoming south around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 56. Southwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Light south wind.
Wednesday
Partly sunny, with a high near 64. Southwest wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 43. Calm wind.
Thursday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 62. Calm wind becoming north 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 25. North wind 6 to 9 mph, with gusts as high as 18 mph.
Friday
Mostly sunny, with a high near 44. North wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 23. West wind 3 to 6 mph.
Saturday
Sunny, with a high near 51. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 31. South wind around 6 mph.
Sunday
Mostly sunny, with a high near 60. Southwest wind 5 to 10 mph.
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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:
1:26 am CDT Mar 23, 2026
Forecast Valid:
4am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
Forecast Discussion
 
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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