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

34°F

1°C

Humidity 81%
Wind Speed Calm
Barometer 30.10 in (1020.5 mb)
Dewpoint 29°F (-2°C)
Visibility 7.00 mi
Last update 3 Mar 6:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 48. Calm wind.

    High: 48 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Patchy fog between 2am and 5am. Otherwise, partly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Sunny, with a high near 54. Calm wind.

    High: 54 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Clear
    then Slight
    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 51. Calm wind becoming east around 5 mph.

    High: 51 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 39. Light southeast wind.

    Low: 39 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Rain. High near 60. Southeast wind 5 to 7 mph becoming south in the afternoon. Chance of precipitation is 100%.

    High: 60 °F

    Rain

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 38. South wind around 7 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Partly sunny, with a high near 53. West wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 48. Calm wind.
Tonight
Patchy fog between 2am and 5am. Otherwise, partly cloudy, with a low around 26. Calm wind.
Wednesday
Sunny, with a high near 54. Calm wind.
Wednesday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33. Calm wind.
Thursday
A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 51. Calm wind becoming east around 5 mph.
Thursday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 39. Light southeast wind.
Friday
Rain. High near 60. Southeast wind 5 to 7 mph becoming south in the afternoon. Chance of precipitation is 100%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 38. South wind around 7 mph becoming west after midnight. Chance of precipitation is 70%.
Saturday
A 20 percent chance of rain before noon. Partly sunny, with a high near 53. West wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 32. West wind 6 to 8 mph becoming southwest after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly sunny, with a high near 59. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 34. West wind 5 to 7 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 59. West wind 5 to 10 mph, with gusts as high as 18 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:
8:31 am CST Mar 3, 2026
Forecast Valid:
8am CST Mar 3, 2026-6pm CDT Mar 9, 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