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.

Partly Cloudy

47°F

8°C

Humidity 85%
Wind Speed Calm
Barometer 29.81 in (1010.4 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 21 Mar 8:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Mostly sunny, with a high near 78. Breezy, with a south wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

    High: 78 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 37. West wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 47. North wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 47 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 23. North wind around 6 mph becoming calm in the evening.

    Low: 23 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49. Light and variable wind.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 57. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 57 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32. East wind around 6 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain and snow showers before 1pm, then a slight chance of rain showers. Mostly cloudy, with a high near 52. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.

    High: 52 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Today
Mostly sunny, with a high near 78. Breezy, with a south wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 28 mph.
Tonight
A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 37. West wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of showers before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 47. North wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 23. North wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 49. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.
Tuesday
Mostly cloudy, with a high near 57. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 32. East wind around 6 mph.
Wednesday
A slight chance of rain and snow showers before 1pm, then a slight chance of rain showers. Mostly cloudy, with a high near 52. Southeast wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 38. Southeast wind around 7 mph becoming southwest after midnight.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 54. Northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 23. North wind 7 to 10 mph, with gusts as high as 21 mph.
Friday
Mostly sunny, with a high near 44. North wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
7:26 am CDT Mar 21, 2026
Forecast Valid:
9am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation