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.

48°F

9°C

Humidity 68%
Wind Speed Calm
Barometer 30.17 in (1022.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 22 May 5:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: Partly sunny, with a high near 66. Breezy, with an east wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.

    High: 66 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 51. East wind 6 to 14 mph, with gusts as high as 25 mph.

    Low: 51 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 72. Southeast wind 3 to 6 mph.

    High: 72 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy during the early evening, then becoming cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Becoming
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 88. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. Light south wind.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.

    High: 89 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 66. Breezy, with an east wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 51. East wind 6 to 14 mph, with gusts as high as 25 mph.
Saturday
A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 72. Southeast wind 3 to 6 mph.
Saturday Night
Partly cloudy during the early evening, then becoming cloudy, with a low around 50. Calm wind.
Sunday
Mostly sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 53. Calm wind.
Memorial Day
Sunny, with a high near 88. Calm wind becoming south 5 to 9 mph in the afternoon.
Monday Night
Mostly clear, with a low around 59. Light south wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 59. Calm wind.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming southeast 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 60. East wind 3 to 6 mph.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. East wind 3 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.97°N 90.81°W
Last Update:
6:46 am CDT May 22, 2026
Forecast Valid:
7am CDT May 22, 2026-6pm CDT May 28, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation