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.

A Few Clouds

72°F

22°C

Humidity 85%
Wind Speed Calm
Barometer 29.96 in (1014.6 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 16 Jun 9:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 4pm. Mostly cloudy, with a high near 82. Light south wind increasing to 5 to 9 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers
    Likely then
    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then a chance of showers. Low around 64. South wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    T-storms

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 81. West wind around 7 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Light and variable wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Calm wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 77 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. West wind 3 to 6 mph.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 79. West wind 5 to 8 mph.

    High: 79 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

Today
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 4pm. Mostly cloudy, with a high near 82. Light south wind increasing to 5 to 9 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 4am, then a chance of showers. Low around 64. South wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 81. West wind around 7 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. Light and variable wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Calm wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. West wind 3 to 6 mph.
Juneteenth
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 79. West wind 5 to 8 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 21 mph.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 9 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny, with a high near 88. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 72. South wind around 8 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 89. South wind 9 to 15 mph, with gusts as high as 24 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 44.01°N 90.51°W
Last Update:
9:44 am CDT Jun 16, 2025
Forecast Valid:
10am CDT Jun 16, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation