National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

41°F

5°C

Humidity 45%
Wind Speed W 15 G 25 mph
Barometer 29.94 in (1014.9 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 18 Apr 3:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: Partly cloudy, with a low around 28. West wind 10 to 15 mph becoming light. Winds could gust as high as 25 mph.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of flurries before 9am. Widespread frost before 8am. Otherwise, mostly sunny, with a high near 46. Light west wind becoming northwest 8 to 13 mph in the morning. Winds could gust as high as 22 mph.

    High: 46 °F

    Chance
    Flurries

  • Sunday Night

    Sunday Night: Widespread frost between 4am and 5am. Otherwise, mostly clear, with a low around 23. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 23 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 54 °F

    Frost then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. South wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 72. Southwest wind around 6 mph becoming northwest in the afternoon.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 39. Calm wind.

    Low: 39 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. East wind 3 to 8 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 28. West wind 10 to 15 mph becoming light. Winds could gust as high as 25 mph.
Sunday
A chance of flurries before 9am. Widespread frost before 8am. Otherwise, mostly sunny, with a high near 46. Light west wind becoming northwest 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Widespread frost between 4am and 5am. Otherwise, mostly clear, with a low around 23. Northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Widespread frost before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming south 5 to 9 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 41. South wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 72. Southwest wind around 6 mph becoming northwest in the afternoon.
Tuesday Night
Clear, with a low around 39. Calm wind.
Wednesday
Sunny, with a high near 72. East wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 54. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 76. Breezy, with a south wind 9 to 16 mph, with gusts as high as 26 mph.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. South wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 65. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 36. Northwest wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 58. Northwest wind 8 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:
3:26 pm CDT Apr 18, 2026
Forecast Valid:
4pm CDT Apr 18, 2026-6pm CDT Apr 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