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

36°F

2°C

Humidity 42%
Wind Speed NW 15 G 26 mph
Barometer 30.00 in (1017.2 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Feb 1:55 pm CST
Extended Forecast for

Tomah WI

  • This Afternoon

    This Afternoon: Sunny, with a high near 37. Breezy, with a north wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 37 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around -2. North wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 22 mph.

    Low: -2 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 23. Wind chill values as low as -1. Calm wind becoming south around 6 mph in the afternoon.

    High: 23 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16. Southeast wind 3 to 6 mph.

    Low: 16 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 33. Southeast wind 3 to 6 mph.

    High: 33 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 19. Light and variable wind.

    Low: 19 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 43. Southwest wind 3 to 6 mph.

    High: 43 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27. Light and variable wind.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 44. Light and variable wind becoming northwest 5 to 7 mph in the morning.

    High: 44 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 37. Breezy, with a north wind 10 to 17 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around -2. North wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 22 mph.
Saturday
Increasing clouds, with a high near 23. Wind chill values as low as -1. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 16. Southeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 33. Southeast wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around 19. Light and variable wind.
Monday
Partly sunny, with a high near 43. Southwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 27. Light and variable wind.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 44. Light and variable wind becoming northwest 5 to 7 mph in the morning.
Tuesday Night
A chance of rain and snow before midnight, then a slight chance of snow. Mostly cloudy, with a low around 23. Northwest wind around 6 mph. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of snow. Partly sunny, with a high near 35. Northwest wind 6 to 8 mph.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 18. Northwest wind 3 to 5 mph.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 35. Northwest wind 3 to 6 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:
1:02 pm CST Feb 6, 2026
Forecast Valid:
2pm CST Feb 6, 2026-6pm CST Feb 12, 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