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.

Overcast

54°F

12°C

Humidity 39%
Wind Speed W 6 mph
Barometer 30.14 in (1021.4 mb)
Dewpoint 29°F (-2°C)
Visibility 9.00 mi
Wind Chill52°F (11°C)
Last update 9 Apr 4:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: Showers likely, mainly before 1am. Mostly cloudy, with a low around 33. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 52. Northwest wind 5 to 8 mph.

    High: 52 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: A 50 percent chance of showers after 1pm. Increasing clouds, 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 9 to 11 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 and possibly a thunderstorm. High near 71. Breezy, with a southwest wind 13 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 8 mph, with gusts as high as 18 mph.

    High: 78 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. South wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers likely, mainly before 1am. Mostly cloudy, with a low around 33. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 52. Northwest wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 29. Calm wind.
Saturday
A 50 percent chance of showers after 1pm. Increasing clouds, 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 9 to 11 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 and possibly a thunderstorm. High near 71. Breezy, with a southwest wind 13 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 8 mph, with gusts as high as 18 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. South wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. South wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Wednesday
Showers likely. Partly sunny, with a high near 63. Southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 42. Southwest wind around 7 mph.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 71. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
2:01 pm CDT Apr 9, 2026
Forecast Valid:
5pm CDT Apr 9, 2026-6pm CDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation