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

15°F

-9°C

Humidity 71%
Wind Speed Calm
Barometer 30.53 in (1036.3 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 31 Jan 10:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Sunny, with a high near 21. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 21 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 5. Wind chill values as low as -6. Calm wind becoming south 5 to 7 mph after midnight. Winds could gust as high as 18 mph.

    Low: 5 °F

    Partly Cloudy

  • Sunday

    Sunday: Snow likely after 7am. Mostly cloudy, with a high near 24. Wind chill values as low as -5. South wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 12. Light and variable wind becoming west around 5 mph after midnight. New snow accumulation of less than a half inch possible.

    Low: 12 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 24. Northwest wind 3 to 6 mph.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 6. Calm wind.

    Low: 6 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23. Light north wind.

    High: 23 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 1. Calm wind.

    Low: 1 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 25. Light and variable wind.

    High: 25 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 21. Northwest wind around 5 mph becoming calm in the afternoon.
Tonight
Partly cloudy, with a low around 5. Wind chill values as low as -6. Calm wind becoming south 5 to 7 mph after midnight. Winds could gust as high as 18 mph.
Sunday
Snow likely after 7am. Mostly cloudy, with a high near 24. Wind chill values as low as -5. South wind 7 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 12. Light and variable wind becoming west around 5 mph after midnight. New snow accumulation of less than a half inch possible.
Monday
Mostly sunny, with a high near 24. Northwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 6. Calm wind.
Tuesday
Mostly sunny, with a high near 23. Light north wind.
Tuesday Night
Partly cloudy, with a low around 1. Calm wind.
Wednesday
Sunny, with a high near 25. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 8. Light west wind.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 33. Light southwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 22. Southwest wind 6 to 9 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 32. Northwest wind 8 to 11 mph, with gusts as high as 21 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:
11:03 am CST Jan 31, 2026
Forecast Valid:
11am CST Jan 31, 2026-6pm CST Feb 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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