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.

Fair

18°F

-8°C

Humidity 79%
Wind Speed Calm
Barometer 30.46 in (1033.0 mb)
Dewpoint 13°F (-11°C)
Visibility 9.00 mi
Last update 7 Apr 1:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Clear, with a low around 12. Calm wind.

    Low: 12 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 46. Calm wind becoming south around 6 mph in the afternoon.

    High: 46 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow showers between 11pm and 2am, then rain showers likely. Increasing clouds, with a low around 32. South wind 5 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 32 °F

    Slight Chance
    Snow Showers
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 64. Breezy, with a south wind 13 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 7pm, then a chance of showers between 7pm and 1am. Partly cloudy, with a low around 34. West wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 34 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 55. West wind 5 to 8 mph.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 57. Calm wind becoming northwest around 5 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 12. Calm wind.
Tuesday
Sunny, with a high near 46. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A chance of snow showers between 11pm and 2am, then rain showers likely. Increasing clouds, with a low around 32. South wind 5 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday
Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 64. Breezy, with a south wind 13 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 7pm, then a chance of showers between 7pm and 1am. Partly cloudy, with a low around 34. West wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Sunny, with a high near 55. West wind 5 to 8 mph.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 33. Calm wind.
Friday
Mostly sunny, with a high near 57. Calm wind becoming northwest around 5 mph.
Friday Night
Mostly clear, with a low around 31. Calm wind.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 61. Calm wind becoming southeast 5 to 8 mph in the morning.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Monday
Showers likely. Partly sunny, with a high near 73. Southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
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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 Apr 7, 2026
Forecast Valid:
3am CDT Apr 7, 2026-6pm CDT Apr 13, 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