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

72°F

22°C

Humidity 95%
Wind Speed Calm
Barometer 29.93 in (1013.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 10 Aug 8:55 pm CDT
Extended Forecast for

Viroqua WI

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. Calm wind becoming east around 5 mph after midnight.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely before noon, then a slight chance of showers between noon and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. Southeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. Light southeast wind.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 84. Light and variable wind. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 79. Light and variable wind. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 60. Light and variable wind becoming east around 6 mph after midnight.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. East wind around 9 mph.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Southeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. Calm wind becoming east around 5 mph after midnight.
Tuesday
Showers and thunderstorms likely before noon, then a slight chance of showers between noon and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. Southeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. Light southeast wind.
Wednesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 84. Light and variable wind. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 64. Calm wind.
Thursday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 79. Light and variable wind. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 60. Light and variable wind becoming east around 6 mph after midnight.
Friday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. East wind around 9 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Southeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. Southeast wind around 9 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 50%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 62. Southwest wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 60%.
Sunday
A 20 percent chance of showers. Mostly cloudy, with a high near 77. Northwest wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.
Monday
Partly sunny, with a high near 76. Light and variable wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Viroqua WI
 43.56°N 90.89°W
Last Update:
9:47 pm CDT Aug 10, 2026
Forecast Valid:
9pm CDT Aug 10, 2026-6pm CDT Aug 17, 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