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.

Overcast

40°F

4°C

Humidity 52%
Wind Speed S 10 mph
Barometer 30.11 in (1020.6 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 8 Apr 3:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 38. South wind around 8 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 68. Breezy, with a south wind 14 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 9pm, then a slight chance of showers between 9pm and 10pm. Low around 33. West wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 33 °F

    Showers then
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 55. West wind 5 to 7 mph.

    High: 55 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 34. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 56. Calm wind becoming northwest around 5 mph.

    High: 56 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Clear, with a low around 30. Calm wind.

    Low: 30 °F

    Clear

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 61. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 61 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 48. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

Detailed Forecast

Overnight
A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 38. South wind around 8 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 68. Breezy, with a south wind 14 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 9pm, then a slight chance of showers between 9pm and 10pm. Low around 33. West wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Increasing clouds, with a high near 55. West wind 5 to 7 mph.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 34. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 56. Calm wind becoming northwest around 5 mph.
Friday Night
Clear, with a low around 30. Calm wind.
Saturday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 61. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Saturday Night
Showers and possibly a thunderstorm. Low around 48. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Sunday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 73. Breezy, with a south wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 59. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. Southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. Southwest wind around 9 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 54. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
3:36 am CDT Apr 8, 2026
Forecast Valid:
4am CDT Apr 8, 2026-6pm CDT Apr 14, 2026
 
Forecast Discussion
 
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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