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

6°F

-14°C

Humidity 69%
Wind Speed Calm
Barometer 30.41 in (1032.2 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 30 Jan 3:55 am CST
Extended Forecast for

Tomah WI

  • Today

    Today: Mostly sunny, with a high near 14. Wind chill values as low as -15. Calm wind becoming north 5 to 9 mph in the morning.

    High: 14 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around -1. Northwest wind 3 to 5 mph.

    Low: -1 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 21. Wind chill values as low as -8. Light and variable wind.

    High: 21 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1. Calm wind becoming south around 5 mph after midnight.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Snow likely, mainly after noon. Partly sunny, with a high near 24. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Slight Chance
    Snow then
    Snow Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 13. Light and variable wind.

    Low: 13 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 26 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 11. Calm wind.

    Low: 11 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 26. Calm wind becoming east around 5 mph.

    High: 26 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 14. Wind chill values as low as -15. Calm wind becoming north 5 to 9 mph in the morning.
Tonight
Partly cloudy, with a low around -1. Northwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 21. Wind chill values as low as -8. Light and variable wind.
Saturday Night
Mostly clear, with a low around 1. Calm wind becoming south around 5 mph after midnight.
Sunday
Snow likely, mainly after noon. Partly sunny, with a high near 24. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around 13. Light and variable wind.
Monday
Partly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 11. Calm wind.
Tuesday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 26. Calm wind becoming east around 5 mph.
Tuesday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 11. Calm wind.
Wednesday
Partly sunny, with a high near 27. Calm wind becoming northwest around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 11. Calm wind.
Thursday
A 20 percent chance of snow. Mostly cloudy, with a high near 31. Calm wind becoming southwest 5 to 9 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
4:31 am CST Jan 30, 2026
Forecast Valid:
4am CST Jan 30, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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