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

43°F

6°C

Humidity 90%
Wind Speed Calm
Barometer 29.78 in (1009.2 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 20 Mar 8:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Partly sunny, with a high near 56. Northwest wind 5 to 7 mph.

    High: 56 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 71. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph.

    High: 71 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 42. Light and variable wind becoming north 5 to 7 mph after midnight.

    Low: 42 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 49. North wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 49 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. North wind 3 to 7 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 48. Calm wind becoming northwest around 5 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32. Calm wind becoming south around 6 mph after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. Southwest wind 6 to 8 mph becoming west in the afternoon.

    High: 54 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 56. Northwest wind 5 to 7 mph.
Tonight
Mostly cloudy, with a low around 36. Light and variable wind.
Saturday
Partly sunny, with a high near 71. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 42. Light and variable wind becoming north 5 to 7 mph after midnight.
Sunday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 49. North wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 24. North wind 3 to 7 mph.
Monday
Sunny, with a high near 48. Calm wind becoming northwest around 5 mph.
Monday Night
Mostly cloudy, with a low around 32. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 54. Southwest wind 6 to 8 mph becoming west in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 29. Light and variable wind becoming east around 6 mph after midnight.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 50. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36. South wind 6 to 8 mph, with gusts as high as 18 mph.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 53. Northwest wind 8 to 15 mph, with gusts as high as 23 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:
8:47 am CDT Mar 20, 2026
Forecast Valid:
9am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation