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

58°F

14°C

Humidity 42%
Wind Speed NW 15 G 20 mph
Barometer 29.87 in (1012.1 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 31 Mar 2:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 47. Light northeast wind becoming east 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 47 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain showers and sleet, becoming all rain after 1am. Low around 31. East wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New sleet accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Sleet

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 58. Breezy, with an east wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 32. West wind 7 to 14 mph, with gusts as high as 26 mph.

    Low: 32 °F

    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 55. Calm wind becoming northeast 5 to 7 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 35. East wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 35 °F

    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 11 to 18 mph becoming west in the afternoon.

    High: 46 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A slight chance of rain and snow showers before 1am. Mostly cloudy, with a low around 27. Breezy, with a northwest wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 32. Northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Wednesday
Partly sunny, with a high near 47. Light northeast wind becoming east 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
Rain showers and sleet, becoming all rain after 1am. Low around 31. East wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New sleet accumulation of less than a half inch possible.
Thursday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 58. Breezy, with an east wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 32. West wind 7 to 14 mph, with gusts as high as 26 mph.
Friday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 55. Calm wind becoming northeast 5 to 7 mph in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 35. East wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 11 to 18 mph becoming west in the afternoon.
Saturday Night
A slight chance of rain and snow showers before 1am. Mostly cloudy, with a low around 27. Breezy, with a northwest wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 49. Northwest wind 11 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 27. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
A slight chance of rain and snow showers. Partly sunny, with a high near 55. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 33. West wind around 7 mph.
Tuesday
Partly sunny, with a high near 54. North wind 7 to 10 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
2:46 pm CDT Mar 31, 2026
Forecast Valid:
3pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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