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Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

75°F

24°C

Humidity 82%
Wind Speed Calm
Barometer 29.88 in (1011.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 9 Aug 7:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Areas Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: A 10 percent chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59. Light and variable wind.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 77. Light northeast wind.

    High: 77 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 61. Calm wind.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 84. Calm wind.
Monday Night
A 10 percent chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 62. Calm wind.
Tuesday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. Calm wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 83. Calm wind becoming northwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 59. Light and variable wind.
Thursday
Partly sunny, with a high near 77. Light northeast wind.
Thursday Night
Mostly cloudy, with a low around 55. Calm wind.
Friday
Mostly sunny, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 56. Light southeast wind.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 77. Calm wind becoming southeast around 6 mph in the afternoon.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 76. Calm wind becoming northwest around 5 mph in the afternoon.
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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:
7:36 pm CDT Aug 9, 2026
Forecast Valid:
8pm CDT Aug 9, 2026-6pm CDT Aug 16, 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