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

53°F

12°C

Humidity 57%
Wind Speed Calm
Barometer 30.05 in (1018.5 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 19 Mar 12:55 pm CDT
Extended Forecast for

Tomah WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 46. Southeast wind 3 to 5 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Light and variable wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 20 mph.

    Low: 35 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 55. Northwest wind 5 to 7 mph.

    High: 55 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68. Calm wind becoming south 5 to 7 mph in the morning.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 35. South wind around 7 mph becoming northeast after midnight.

    Low: 35 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: A slight chance of rain and snow before 1pm. Mostly cloudy, with a high near 45. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 22. North wind 5 to 7 mph.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 45. Northwest wind 3 to 6 mph.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 46. Southeast wind 3 to 5 mph.
Tonight
Mostly cloudy, with a low around 35. Light and variable wind becoming south 5 to 7 mph in the evening. Winds could gust as high as 20 mph.
Friday
Mostly cloudy, with a high near 55. Northwest wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 35. Calm wind.
Saturday
Mostly sunny, with a high near 68. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 35. South wind around 7 mph becoming northeast after midnight.
Sunday
A slight chance of rain and snow before 1pm. Mostly cloudy, with a high near 45. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 22. North wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 45. Northwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 29. South wind 3 to 6 mph.
Tuesday
Mostly cloudy, with a high near 52. Southwest wind 6 to 8 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 29. North wind around 6 mph becoming east after midnight.
Wednesday
Mostly cloudy, with a high near 55. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
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:
1:01 pm CDT Mar 19, 2026
Forecast Valid:
1pm CDT Mar 19, 2026-6pm CDT Mar 25, 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