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.

Light Rain

56°F

13°C

Humidity 97%
Wind Speed Calm
Barometer 29.58 in (1002.1 mb)
Dewpoint 55°F (13°C)
Visibility 8.00 mi
Last update 7 Mar 1:55 am CST
Extended Forecast for

Tomah WI

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 3am, then a chance of showers. Patchy fog. Otherwise, cloudy, with a low around 39. West wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: A 40 percent chance of showers before 8am. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a temperature falling to around 34 by 2pm. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F⇓

    Chance
    Showers and
    Patchy Fog

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30. Southwest wind 5 to 13 mph, with gusts as high as 26 mph.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62. Southwest wind 11 to 14 mph, with gusts as high as 28 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43. Southwest wind 9 to 13 mph, with gusts as high as 26 mph.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65. Southwest wind 5 to 8 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. Light and variable wind becoming east 5 to 8 mph after midnight. Winds could gust as high as 18 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers after noon. Mostly sunny, with a high near 51. East wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 51 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of rain showers before midnight, then a chance of rain and snow showers. Mostly cloudy, with a low around 27. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 27 °F

    Chance
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 3am, then a chance of showers. Patchy fog. Otherwise, cloudy, with a low around 39. West wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 40 percent chance of showers before 8am. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a temperature falling to around 34 by 2pm. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly clear, with a low around 30. Southwest wind 5 to 13 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 62. Southwest wind 11 to 14 mph, with gusts as high as 28 mph.
Sunday Night
Mostly cloudy, with a low around 43. Southwest wind 9 to 13 mph, with gusts as high as 26 mph.
Monday
Mostly sunny, with a high near 65. Southwest wind 5 to 8 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 33. Light and variable wind becoming east 5 to 8 mph after midnight. Winds could gust as high as 18 mph.
Tuesday
A 40 percent chance of showers after noon. Mostly sunny, with a high near 51. East wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of rain showers before midnight, then a chance of rain and snow showers. Mostly cloudy, with a low around 27. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Wednesday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 42. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 21. Northwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Thursday
Partly sunny, with a high near 46. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 29. South wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Friday
A chance of rain and snow showers. Mostly cloudy, with a high near 48. Breezy, with a southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
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:
2:01 am CST Mar 7, 2026
Forecast Valid:
2am CST Mar 7, 2026-6pm CDT Mar 13, 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