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.

Fog/Mist

62°F

17°C

Humidity 95%
Wind Speed Calm
Barometer 30.04 in (1017.3 mb)
Dewpoint 61°F (16°C)
Visibility 6.00 mi
Last update 3 Oct 9:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 66. Light and variable wind.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 91 °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 84. Breezy, with a south wind 10 to 20 mph, with gusts as high as 32 mph.

    High: 84 °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 10 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 42. Calm wind.

    Low: 42 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 67. Calm wind becoming northwest 5 to 7 mph in the morning.

    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 steady temperature around 66. Light and variable wind.
Saturday
Sunny, with a high near 91. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 29 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 84. Breezy, with a south wind 10 to 20 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 10 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 42. Calm wind.
Tuesday
Sunny, with a high near 67. Calm wind becoming northwest 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 38. Calm wind.
Wednesday
Sunny, with a high near 66. Calm wind becoming southeast around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 39. Light southeast wind.
Thursday
Sunny, with a high near 69. 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 8 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
Last Update:
10:13 pm CDT Oct 3, 2025
Forecast Valid:
10pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
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Additional Resources

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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