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.

A Few Clouds

77°F

25°C

Humidity 44%
Wind Speed Calm
Barometer 29.97 in (1014.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 12:55 pm CDT
Extended Forecast for

4 Miles NW Sparta WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Light northwest wind.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am. Low around 60. South wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Slight Chance
    T-storms then
    Showers

  • Friday

    Friday: A slight chance of showers between 7am and 1pm. Mostly sunny, with a high near 81. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 57. Light west wind.

    Low: 57 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 80. Light west wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53. North wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Light northwest wind.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Light northwest wind.
Tonight
Mostly clear, with a low around 51. Calm wind.
Thursday
Sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Thursday Night
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am. Low around 60. South wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A slight chance of showers between 7am and 1pm. Mostly sunny, with a high near 81. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 20%.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 57. Light west wind.
Saturday
Sunny, with a high near 80. Light west wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 53. North wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 78. Light northwest wind.
Sunday Night
Partly cloudy, with a low around 53. Calm wind.
Monday
Mostly sunny, with a high near 80. Light south wind.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83. Calm wind becoming west 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sparta WI
 43.99°N 90.87°W
Last Update:
12:06 pm CDT Aug 19, 2026
Forecast Valid:
1pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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