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

41°F

5°C

Humidity 72%
Wind Speed W 7 mph
Barometer 29.56 in (1001.9 mb)
Dewpoint 33°F (1°C)
Visibility 9.00 mi
Wind Chill36°F (2°C)
Last update 13 Jan 7:55 pm CST
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: A chance of rain and snow showers before 3am, then a chance of flurries between 3am and 5am. Cloudy, with a low around 15. Blustery, with a north wind 16 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.

    Low: 15 °F

    Chance
    Rain/Snow and
    Blustery

  • Wednesday

    Wednesday: Mostly sunny, with a steady temperature around 18. Wind chill values as low as -2. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 33 mph.

    High: 18 °F

    Mostly Sunny
    and Blustery

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 5. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 5 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of snow after noon. Increasing clouds, with a high near 24. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow. Low around 22. South wind around 8 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow

  • Friday

    Friday: Snow. High near 33. West wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 33 °F

    Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 9 to 11 mph, with gusts as high as 24 mph.

    Low: 7 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow. Mostly cloudy, with a high near 15. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 15 °F

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -2. West wind around 7 mph, with gusts as high as 18 mph.

    Low: -2 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of rain and snow showers before 3am, then a chance of flurries between 3am and 5am. Cloudy, with a low around 15. Blustery, with a north wind 16 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a steady temperature around 18. Wind chill values as low as -2. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 5. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
A 40 percent chance of snow after noon. Increasing clouds, with a high near 24. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.
Thursday Night
Snow. Low around 22. South wind around 8 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow. High near 33. West wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 9 to 11 mph, with gusts as high as 24 mph.
Saturday
A 20 percent chance of snow. Mostly cloudy, with a high near 15. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around -2. West wind around 7 mph, with gusts as high as 18 mph.
Sunday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 13. West wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 0. West wind around 8 mph, with gusts as high as 20 mph.
M.L.King Day
Partly sunny, with a high near 11. Northwest wind 8 to 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around -7. Northwest wind 3 to 7 mph. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 13. Light and variable wind becoming west 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:
5:21 pm CST Jan 13, 2026
Forecast Valid:
8pm CST Jan 13, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation