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

87°F

31°C

Humidity 47%
Wind Speed Calm
Barometer 30.05 in (1017.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 3 Oct 3:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind 3 to 5 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 90. Breezy, with a south wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 90 °F

    Sunny then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63. South wind around 11 mph, with gusts as high as 26 mph.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Breezy, with a south wind 11 to 18 mph, with gusts as high as 32 mph.

    High: 83 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. South wind 5 to 9 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers. Partly sunny, with a high near 68. Northwest wind 3 to 7 mph.

    High: 68 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 67. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. South wind 3 to 5 mph.
Saturday
Sunny, with a high near 90. Breezy, with a south wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Saturday Night
Mostly clear, with a low around 63. South wind around 11 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 83. Breezy, with a south wind 11 to 18 mph, with gusts as high as 32 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. South wind 5 to 9 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 68. Northwest wind 3 to 7 mph.
Monday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 43. Calm wind.
Tuesday
Sunny, with a high near 67. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 38. Calm wind.
Wednesday
Sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 40. Light southeast wind.
Thursday
Sunny, with a high near 68. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 47. South wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 69. Light and variable wind becoming southwest 5 to 7 mph in the morning.
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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:
4:28 pm CDT Oct 3, 2025
Forecast Valid:
4pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation