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

63°F

17°C

Humidity 94%
Wind Speed Calm
Barometer 29.71 in (1006.4 mb)
Dewpoint 61°F (16°C)
Visibility 8.00 mi
Last update 12 Apr 10:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 74. Breezy, with a southwest wind 15 to 21 mph, with gusts as high as 32 mph.

    High: 74 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Breezy, with a southwest wind 7 to 16 mph, with gusts as high as 29 mph.

    Low: 58 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 77. Light southwest wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 57. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 50 percent chance of showers after 1pm. Mostly sunny, with a high near 78. Calm wind becoming west around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 78 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 53. 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: 53 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 60%.

    High: 72 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming southwest after midnight. Chance of precipitation is 50%.

    Low: 50 °F

    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers. Mostly sunny, with a high near 74. West wind 5 to 8 mph.

    High: 74 °F

    Slight Chance
    Showers

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 74. Breezy, with a southwest wind 15 to 21 mph, with gusts as high as 32 mph.
Tonight
Mostly cloudy, with a low around 58. Breezy, with a southwest wind 7 to 16 mph, with gusts as high as 29 mph.
Monday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 77. Light southwest wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 57. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers after 1pm. Mostly sunny, with a high near 78. Calm wind becoming west around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 53. 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 chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Calm wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming southwest after midnight. Chance of precipitation is 50%.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74. West wind 5 to 8 mph.
Thursday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 53. South wind around 6 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 76. South wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 41. Southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Saturday
A 40 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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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
9:31 am CDT Apr 12, 2026
Forecast Valid:
11am CDT Apr 12, 2026-6pm CDT Apr 18, 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