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

6°F

-14°C

Humidity 82%
Wind Speed Calm
Barometer 29.85 in (1013.2 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Last update 26 Feb 7:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Mostly sunny, with a high near 38. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.

    High: 38 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 25. Southwest wind 5 to 7 mph.

    Low: 25 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 49. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 49 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Increasing clouds, with a low around 15. Northwest wind 7 to 13 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 50 percent chance of snow. Mostly cloudy, with a high near 24. Northwest wind 5 to 7 mph. New snow accumulation of less than one inch possible.

    High: 24 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm in the evening.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 24. Calm wind becoming east around 5 mph.

    High: 24 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 9. Calm wind.

    Low: 9 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35. Calm wind becoming south 5 to 7 mph in the morning.

    High: 35 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 38. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 25. Southwest wind 5 to 7 mph.
Friday
Mostly sunny, with a high near 49. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 26 mph.
Friday Night
Increasing clouds, with a low around 15. Northwest wind 7 to 13 mph, with gusts as high as 26 mph.
Saturday
A 50 percent chance of snow. Mostly cloudy, with a high near 24. Northwest wind 5 to 7 mph. New snow accumulation of less than one inch possible.
Saturday Night
Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 24. Calm wind becoming east around 5 mph.
Sunday Night
Mostly cloudy, with a low around 9. Calm wind.
Monday
Partly sunny, with a high near 35. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 18. South wind around 5 mph.
Tuesday
A 20 percent chance of snow. Mostly cloudy, with a high near 41. Southwest wind 5 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 21. West wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 45. West wind 5 to 8 mph becoming southeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
8:32 am CST Feb 26, 2026
Forecast Valid:
9am CST Feb 26, 2026-6pm CST Mar 4, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation