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.

Fair

76°F

24°C

Humidity 27%
Wind Speed SW 3 mph
Barometer 29.78 in (1008.5 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 16 Apr 4:55 pm CDT
Extended Forecast for

Tomah WI

Flood Watch April 17, 01:00pm until April 18, 07:00am
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: Clear, with a low around 52. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 52 °F

    Clear

  • Friday

    Friday: Showers and thunderstorms likely, mainly after 4pm. Mostly sunny, with a high near 78. Breezy, with a south wind 8 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Breezy.
    Mostly Sunny
    then T-storms
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 31. Northwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 31 °F

    T-storms then
    Showers

  • Saturday

    Saturday: A slight chance of rain showers before 10am, then a slight chance of sleet between 10am and 1pm. Mostly sunny, with a high near 45. Breezy, with a west wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 45 °F

    Breezy.
    Slight Chance
    Rain/Sleet
    then Slight
    Chance Sleet

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27. West wind 6 to 14 mph, with gusts as high as 26 mph.

    Low: 27 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 48. Northwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 48 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Northwest wind around 6 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South wind 7 to 9 mph, with gusts as high as 21 mph.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 52. Calm wind becoming south 5 to 7 mph after midnight.
Friday
Showers and thunderstorms likely, mainly after 4pm. Mostly sunny, with a high near 78. Breezy, with a south wind 8 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 31. Northwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
A slight chance of rain showers before 10am, then a slight chance of sleet between 10am and 1pm. Mostly sunny, with a high near 45. Breezy, with a west wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 27. West wind 6 to 14 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 48. Northwest wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 25. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 59. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Partly cloudy, with a low around 44. South wind 7 to 9 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 70. Southwest wind 7 to 9 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 41. Northwest wind around 5 mph becoming east after midnight.
Wednesday
Sunny, with a high near 69. Southeast wind 3 to 7 mph.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 44. Southeast wind around 6 mph.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 69. Southeast wind 6 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
3:07 pm CDT Apr 16, 2026
Forecast Valid:
5pm CDT Apr 16, 2026-6pm CDT Apr 23, 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