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.

Fair

78°F

26°C

Humidity 87%
Wind Speed Calm
Barometer 29.92 in (1012.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 29 Jun 1:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a steady temperature around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 89. Light southwest wind increasing to 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 65. Light southwest wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers
    Likely then
    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 82. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 60. West wind 5 to 7 mph becoming calm in the evening.

    Low: 60 °F

    Slight Chance
    T-storms then
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. West wind 3 to 8 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. West wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 62. Light and variable wind.

    Low: 62 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a steady temperature around 72. Calm wind.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 89. Light southwest wind increasing to 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 65. Light southwest wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 82. Calm wind becoming west 5 to 8 mph in the afternoon.
Monday Night
A 10 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 60. West wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82. West wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 62. West wind around 5 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 62. Light and variable wind.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63. Light south wind.
Independence Day
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. South wind 5 to 8 mph.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 6 mph.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 86. Southwest wind 6 to 8 mph. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.84°W
Last Update:
11:44 pm CDT Jun 28, 2025
Forecast Valid:
2am CDT Jun 29, 2025-6pm CDT Jul 5, 2025
 
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