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.

Overcast

56°F

13°C

Humidity 94%
Wind Speed Calm
Barometer 29.68 in (1005.3 mb)
Dewpoint 54°F (12°C)
Visibility 8.00 mi
Last update 15 Apr 6:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 50. Calm wind. New rainfall amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 71. Light and variable wind.

    High: 71 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. Calm wind becoming south around 6 mph after midnight.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm, mainly after 4pm. Partly sunny, with a high near 78. Breezy, with a south wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Partly Sunny
    then Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 35. South wind around 10 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Showers

  • Saturday

    Saturday: A 40 percent chance of showers. Partly sunny, with a high near 46. Breezy, with a west wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 46 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of snow showers before 1am. Mostly cloudy, with a low around 28. Breezy, with a west wind 9 to 18 mph, with gusts as high as 29 mph.

    Low: 28 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Sunday

    Sunday: Mostly sunny, with a high near 49. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 67. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 50. Calm wind. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 71. Light and variable wind.
Thursday Night
Mostly clear, with a low around 51. Calm wind becoming south around 6 mph after midnight.
Friday
Showers likely and possibly a thunderstorm, mainly after 4pm. Partly sunny, with a high near 78. Breezy, with a south wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 35. South wind around 10 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 46. Breezy, with a west wind 11 to 17 mph, with gusts as high as 25 mph.
Saturday Night
A 20 percent chance of snow showers before 1am. Mostly cloudy, with a low around 28. Breezy, with a west wind 9 to 18 mph, with gusts as high as 29 mph.
Sunday
Mostly sunny, with a high near 49. Northwest wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 26. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 60. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Partly cloudy, with a low around 42. South wind around 9 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 68. West wind 8 to 11 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
5:56 am CDT Apr 15, 2026
Forecast Valid:
9am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation