National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

A Few Clouds

91°F

33°C

Humidity 51%
Wind Speed SW 9 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 1 Sep 2:55 pm CDT
Extended Forecast for

4 Miles S Sparta WI

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: A 10 percent chance of showers and thunderstorms before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 89. Light and variable wind.

    High: 89 °F

    Slight Chance
    T-storms then
    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Partly sunny, with a high near 88. Light south wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Light and variable wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 87. Calm wind.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 10 percent chance of showers and thunderstorms before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 89. Light and variable wind.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Calm wind.
Thursday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Partly sunny, with a high near 88. Light south wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Light and variable wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 87. Calm wind.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65. Calm wind.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 84. Light and variable wind.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62. Calm wind.
Labor Day
A 20 percent chance of showers. Partly sunny, with a high near 80. Calm wind becoming east around 6 mph in the afternoon.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 58. Southeast wind 3 to 5 mph.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 79. Southeast wind 7 to 10 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Sparta WI
 43.89°N 90.82°W
Last Update:
2:01 pm CDT Sep 1, 2026
Forecast Valid:
4pm CDT Sep 1, 2026-6pm CDT Sep 8, 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