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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 45. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.

    Low: 45 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 60. Light and variable wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. North wind 5 to 9 mph, with gusts as high as 22 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow showers after 1pm. Mostly cloudy, with a high near 44. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 44 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow showers likely, possibly mixed with rain showers and freezing rain before 1am, then freezing rain, possibly mixed with snow showers. Low around 28. East wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 28 °F

    Wintry Mix

  • Thursday

    Thursday: Rain showers and freezing rain, possibly mixed with snow showers, becoming all rain after 1pm. High near 40. East wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.

    High: 40 °F

    Wintry Mix

  • Thursday Night

    Thursday Night: A chance of rain and snow showers, mainly before 1am. Mostly cloudy, with a low around 29. Northeast wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 29 °F

    Chance
    Rain/Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 42. Calm wind.
Monday
Sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 45. Calm wind becoming east around 5 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 60. Light and variable wind becoming northwest 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Mostly cloudy, with a low around 29. North wind 5 to 9 mph, with gusts as high as 22 mph.
Wednesday
A chance of rain and snow showers after 1pm. Mostly cloudy, with a high near 44. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
Snow showers likely, possibly mixed with rain showers and freezing rain before 1am, then freezing rain, possibly mixed with snow showers. Low around 28. East wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Thursday
Rain showers and freezing rain, possibly mixed with snow showers, becoming all rain after 1pm. High near 40. East wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Thursday Night
A chance of rain and snow showers, mainly before 1am. Mostly cloudy, with a low around 29. Northeast wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Friday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 49. North wind 5 to 8 mph becoming east in the afternoon.
Friday Night
Rain and snow showers likely. Mostly cloudy, with a low around 33. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Rain and snow showers likely. Mostly cloudy, with a high near 48. East wind 9 to 15 mph becoming west in the afternoon. Chance of precipitation is 60%.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 30. West wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 46. Northwest wind 10 to 14 mph, with gusts as high as 24 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 30, 2026
Forecast Valid:
3am CDT Mar 30, 2026-6pm CDT Apr 5, 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