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

25°F

-4°C

Humidity 78%
Wind Speed NW 3 mph
Barometer 30.33 in (1028.8 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 11 Jan 8:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Mostly cloudy, with a high near 29. West wind 6 to 9 mph.

    High: 29 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 22. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 40. West wind 3 to 7 mph.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after midnight. Increasing clouds, with a low around 28. Calm wind becoming southwest 5 to 8 mph in the evening. Winds could gust as high as 21 mph.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 44. West wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 44 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 20. Northwest wind around 10 mph, with gusts as high as 23 mph.

    Low: 20 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Partly sunny, with a high near 26. North wind 7 to 11 mph, with gusts as high as 23 mph.

    High: 26 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. North wind around 6 mph becoming calm in the evening.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of snow after noon. Partly sunny, with a high near 29. Calm wind becoming south 5 to 8 mph in the morning.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 29. West wind 6 to 9 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 22. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 40. West wind 3 to 7 mph.
Monday Night
A 20 percent chance of rain after midnight. Increasing clouds, with a low around 28. Calm wind becoming southwest 5 to 8 mph in the evening. Winds could gust as high as 21 mph.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 44. West wind 8 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 20. Northwest wind around 10 mph, with gusts as high as 23 mph.
Wednesday
A 20 percent chance of snow before noon. Partly sunny, with a high near 26. North wind 7 to 11 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 10. North wind around 6 mph becoming calm in the evening.
Thursday
A 40 percent chance of snow after noon. Partly sunny, with a high near 29. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Snow likely. Mostly cloudy, with a low around 18. Southwest wind around 6 mph. Chance of precipitation is 60%.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 30. West wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 9. Northwest wind around 8 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 19. West wind 7 to 10 mph, with gusts as high as 20 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:
7:52 am CST Jan 11, 2026
Forecast Valid:
9am CST Jan 11, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation