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.

Mostly Cloudy

39°F

4°C

Humidity 65%
Wind Speed W 10 mph
Barometer 30.12 in (1020.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 9 Apr 8:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Increasing clouds, with a high near 56. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 56 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 50 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 33. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 55. Calm wind becoming northwest 5 to 7 mph in the morning.

    High: 55 °F

    Sunny

  • Friday Night

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

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 58. Light southeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 46. Southeast wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 1pm. High near 71. Breezy, with a south wind 11 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 59. Southwest wind 11 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 56. West wind 7 to 10 mph, with gusts as high as 20 mph.
Tonight
A 50 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 33. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Friday
Sunny, with a high near 55. Calm wind becoming northwest 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 30. Calm wind.
Saturday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 58. Light southeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 46. Southeast wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers, with thunderstorms also possible after 1pm. High near 71. Breezy, with a south wind 11 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 59. Southwest wind 11 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Monday Night
Showers and possibly a thunderstorm. Low around 53. South wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 68. Southwest wind 7 to 10 mph becoming northeast in the afternoon. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 39. Northeast wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 58. East wind 9 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
6:41 am CDT Apr 9, 2026
Forecast Valid:
9am CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation