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.

Overcast

34°F

1°C

Humidity 87%
Wind Speed Calm
Barometer 30.00 in (1016.9 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 5 Mar 5:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Mostly cloudy, with a high near 49. Calm wind becoming east around 6 mph in the afternoon.

    High: 49 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers after 5am. Mostly cloudy, with a low around 38. East wind 3 to 5 mph.

    Low: 38 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 9am. High near 62. Southeast wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 62 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Low around 35. South wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before noon. Partly sunny, with a high near 49. Northwest wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 49 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Calm wind becoming southwest 5 to 8 mph in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. Southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. Southwest wind around 7 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 67. Southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 49. Calm wind becoming east around 6 mph in the afternoon.
Tonight
A 20 percent chance of showers after 5am. Mostly cloudy, with a low around 38. East wind 3 to 5 mph.
Friday
Showers, with thunderstorms also possible after 9am. High near 62. Southeast wind 6 to 9 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Low around 35. South wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
A 20 percent chance of showers before noon. Partly sunny, with a high near 49. Northwest wind 5 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 31. Calm wind becoming southwest 5 to 8 mph in the evening. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 61. Southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 42. Southwest wind around 7 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 67. Southwest wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Monday Night
Partly cloudy, with a low around 37. Light and variable wind becoming east around 6 mph after midnight.
Tuesday
Showers likely. Mostly sunny, with a high near 57. East wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 26. North wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Wednesday
A 40 percent chance of snow showers. Partly sunny, with a high near 42. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
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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:
4:41 am CST Mar 5, 2026
Forecast Valid:
6am CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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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