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

68°F

20°C

Humidity 90%
Wind Speed Calm
Barometer 30.15 in (1021.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 29 Sep 6:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Calm wind becoming east around 6 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 55. Light east wind.

    Low: 55 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 79. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 79 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. Light southeast wind.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 83. Calm wind becoming south 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 59. Light south wind.

    Low: 59 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. Light south wind increasing to 5 to 9 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. South wind around 6 mph.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 51. Calm wind.
Tuesday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 84. Calm wind becoming east around 6 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 55. Light east wind.
Wednesday
Partly sunny, with a high near 79. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 53. Light southeast wind.
Thursday
Sunny, with a high near 83. Calm wind becoming south 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 59. Light south wind.
Friday
Sunny, with a high near 86. Light south wind increasing to 5 to 9 mph in the morning.
Friday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. South wind around 6 mph.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 82. South wind 5 to 9 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59. South wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80. Light south wind increasing to 5 to 9 mph in the morning.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57. South wind 3 to 5 mph.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 73. Light and variable wind becoming west 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
Last Update:
6:13 pm CDT Sep 29, 2025
Forecast Valid:
7pm CDT Sep 29, 2025-6pm CDT Oct 6, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation