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

30°F

-1°C

Humidity 79%
Wind Speed Calm
Barometer 30.24 in (1025.3 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 19 Apr 9:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Clear, with a low around 24. Calm wind.

    Low: 24 °F

    Clear

  • Monday

    Monday: Mostly sunny, with a high near 56. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 42. South wind 3 to 8 mph. Winds could gust as high as 18 mph.

    Low: 42 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 41. Calm wind.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76. Calm wind becoming southeast 5 to 8 mph in the afternoon.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon.

    High: 76 °F

    Breezy.
    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 49 °F

    Showers

Detailed Forecast

Tonight
Clear, with a low around 24. Calm wind.
Monday
Mostly sunny, with a high near 56. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 42. South wind 3 to 8 mph. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 74. Light and variable wind.
Tuesday Night
Clear, with a low around 41. Calm wind.
Wednesday
Sunny, with a high near 76. Calm wind becoming southeast 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 58. South wind 7 to 9 mph, with gusts as high as 20 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 63. West wind 9 to 15 mph.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 39. West wind 5 to 8 mph.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 60. Northwest wind 6 to 10 mph.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 36. North wind 3 to 6 mph.
Sunday
A 20 percent chance of showers. Areas of frost. Otherwise, mostly sunny, with a high near 61. Calm wind becoming northwest 5 to 8 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
5:56 pm CDT Apr 19, 2026
Forecast Valid:
10pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
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Additional Resources

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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