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.

Fair

-13°F

-25°C

Humidity 76%
Wind Speed Calm
Barometer 30.29 in (1029.5 mb)
Dewpoint -18°F (-28°C)
Visibility 10.00 mi
Last update 20 Jan 8:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Increasing clouds, with a high near 14. Wind chill values as low as -14. West wind 6 to 9 mph.

    High: 14 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow likely, mainly between 10pm and 3am. Cloudy, with a low around 7. Wind chill values as low as zero. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 7 °F

    Snow Likely

  • Wednesday

    Wednesday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 23. Wind chill values as low as -1. Light west wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph. New snow accumulation of less than a half inch possible.

    High: 23 °F

    Partly Sunny
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 2. Wind chill values as low as -8. West wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 2 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 13. West wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 13 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -19. Northwest wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: -19 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -6. Northwest wind 5 to 9 mph.

    High: -6 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -19. Light northwest wind.

    Low: -19 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 0. Calm wind becoming northwest around 5 mph.

    High: 0 °F

    Cold

Detailed Forecast

Today
Increasing clouds, with a high near 14. Wind chill values as low as -14. West wind 6 to 9 mph.
Tonight
Snow likely, mainly between 10pm and 3am. Cloudy, with a low around 7. Wind chill values as low as zero. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 23. Wind chill values as low as -1. Light west wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
Mostly cloudy, with a low around 2. Wind chill values as low as -8. West wind 7 to 10 mph, with gusts as high as 21 mph.
Thursday
Partly sunny, with a high near 13. West wind 7 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Partly cloudy, with a low around -19. Northwest wind 7 to 9 mph, with gusts as high as 20 mph.
Friday
Mostly sunny and cold, with a high near -6. Northwest wind 5 to 9 mph.
Friday Night
Partly cloudy, with a low around -19. Light northwest wind.
Saturday
Mostly sunny and cold, with a high near 0. Calm wind becoming northwest around 5 mph.
Saturday Night
Partly cloudy, with a low around -13. Calm wind.
Sunday
Mostly sunny, with a high near 9. Calm wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
Mostly cloudy, with a low around -8. West wind around 5 mph.
Monday
Mostly sunny, with a high near 15. West wind 5 to 7 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:
7:42 am CST Jan 20, 2026
Forecast Valid:
9am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
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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