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.

Thunderstorm in Vicinity

78°F

26°C

Humidity 48%
Wind Speed SE 13 G 23 mph
Barometer 29.52 in (999.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 23 Apr 5:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 49. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 49 °F

    Heavy Rain

  • Friday

    Friday: A 10 percent chance of showers before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 65. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 65 °F

    Slight Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 66. Light northeast wind.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 70. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 49. East wind 10 to 15 mph, with gusts as high as 29 mph.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 65. Breezy, with an east wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.

    High: 65 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Southeast wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers and thunderstorms before 4am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 49. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Friday
A 10 percent chance of showers before 7am. Mostly cloudy through mid morning, then gradual clearing, with a high near 65. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 39. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 66. Light northeast wind.
Saturday Night
Mostly cloudy, with a low around 44. Calm wind.
Sunday
Mostly sunny, with a high near 70. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Sunday Night
A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 49. East wind 10 to 15 mph, with gusts as high as 29 mph.
Monday
Showers and possibly a thunderstorm. High near 65. Breezy, with an east wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.
Monday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Southeast wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 59. Breezy, with a west wind 15 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 39. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 21 mph.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 58. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 36. Northwest wind around 6 mph becoming calm in the evening.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 57. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 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:
6:02 pm CDT Apr 23, 2026
Forecast Valid:
6pm CDT Apr 23, 2026-6pm CDT Apr 30, 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