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.

Fair

-30°F

-34°C

Humidity 69%
Wind Speed Calm
Barometer 30.70 in (1044.2 mb)
Dewpoint -36°F (-38°C)
Visibility 10.00 mi
Last update 24 Jan 6:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Mostly sunny and cold, with a high near 0. Wind chill values as low as -18. Calm wind.

    High: 0 °F

    Cold

  • Tonight

    Tonight: Mostly cloudy, with a low around -14. Calm wind.

    Low: -14 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 7. Wind chill values as low as -13. Calm wind becoming north around 6 mph in the afternoon.

    High: 7 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -13. Wind chill values as low as -23. Northwest wind around 6 mph.

    Low: -13 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 10. West wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 10 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 0. Southwest wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 0 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 13. Northwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 13 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around -5. West wind 3 to 6 mph.

    Low: -5 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Partly sunny, with a high near 11. West wind 3 to 7 mph.

    High: 11 °F

    Partly Sunny
    then Slight
    Chance Snow

Detailed Forecast

Today
Mostly sunny and cold, with a high near 0. Wind chill values as low as -18. Calm wind.
Tonight
Mostly cloudy, with a low around -14. Calm wind.
Sunday
Mostly sunny, with a high near 7. Wind chill values as low as -13. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around -13. Wind chill values as low as -23. Northwest wind around 6 mph.
Monday
Mostly sunny, with a high near 10. West wind 6 to 9 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 0. Southwest wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph.
Tuesday
Partly sunny, with a high near 13. Northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around -5. West wind 3 to 6 mph.
Wednesday
A 20 percent chance of snow after noon. Partly sunny, with a high near 11. West wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around -5. Northwest wind around 6 mph.
Thursday
Sunny, with a high near 13. Northwest wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around -3. Northwest wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 17. Calm wind becoming northwest around 6 mph in the morning.
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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:
6:46 am CST Jan 24, 2026
Forecast Valid:
7am CST Jan 24, 2026-6pm CST Jan 30, 2026
 
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Additional Resources

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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