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.

Fog/Mist

64°F

18°C

Humidity 98%
Wind Speed Calm
Barometer 29.91 in (1012.7 mb)
Dewpoint 64°F (18°C)
Visibility 4.00 mi
Last update 12 Aug 6:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly cloudy, with a high near 84. Southwest wind 3 to 8 mph.

    High: 84 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 55. West wind 3 to 6 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Areas of smoke after 2pm. Sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 79 °F

    Sunny then
    Areas Smoke

  • Wednesday Night

    Wednesday Night: Areas of smoke before 8pm. Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Areas Smoke
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. Light south wind. Chance of precipitation is 20%.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 85. South wind 3 to 7 mph. Chance of precipitation is 10%.

    High: 85 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Light south wind.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Light and variable wind becoming south around 6 mph in the morning.

    High: 89 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly cloudy, with a high near 84. Southwest wind 3 to 8 mph.
Tonight
Mostly clear, with a low around 55. West wind 3 to 6 mph.
Wednesday
Areas of smoke after 2pm. Sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Areas of smoke before 8pm. Mostly clear, with a low around 55. Calm wind.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. Light south wind. Chance of precipitation is 20%.
Friday
A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 85. South wind 3 to 7 mph. Chance of precipitation is 10%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. Light south wind.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Light and variable wind becoming south around 6 mph in the morning.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. Light and variable wind.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. East wind 3 to 7 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East wind 3 to 5 mph.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Southeast wind around 6 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:
5:29 am CDT Aug 12, 2025
Forecast Valid:
7am CDT Aug 12, 2025-6pm CDT Aug 18, 2025
 
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