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

46°F

8°C

Humidity 88%
Wind Speed Calm
Barometer 30.23 in (1024.8 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 9 Oct 7:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 48. Calm wind becoming south 5 to 8 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 67. Southwest wind 9 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 67 °F

    Slight Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38. Northwest wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 65. Light and variable wind.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. Light southeast wind.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 65. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 52. Southeast wind around 10 mph, with gusts as high as 24 mph.

    Low: 52 °F

    Chance
    Showers

  • Columbus Day

    Columbus Day: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 68. South wind 6 to 8 mph becoming northwest in the afternoon.

    High: 68 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. Light northwest wind.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 48. Calm wind becoming south 5 to 8 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 67. Southwest wind 9 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Friday Night
Mostly clear, with a low around 38. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 65. Light and variable wind.
Saturday Night
Mostly clear, with a low around 43. Light southeast wind.
Sunday
Partly sunny, with a high near 65. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 52. Southeast wind around 10 mph, with gusts as high as 24 mph.
Columbus Day
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 68. South wind 6 to 8 mph becoming northwest in the afternoon.
Monday Night
Partly cloudy, with a low around 37. Light northwest wind.
Tuesday
Mostly sunny, with a high near 60. Northwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Calm wind.
Wednesday
Mostly sunny, with a high near 60. Calm wind becoming east around 6 mph in the morning.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 41. East wind 3 to 5 mph.
Thursday
A 20 percent chance of showers. Partly sunny, with a high near 62. Southeast wind 6 to 9 mph, with gusts as high as 18 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:
8:06 pm CDT Oct 9, 2025
Forecast Valid:
8pm CDT Oct 9, 2025-6pm CDT Oct 16, 2025
 
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Additional Resources

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Chance of Precipitation