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.

Overcast

51°F

11°C

Humidity 90%
Wind Speed Calm
Barometer 30.26 in (1025.6 mb)
Dewpoint 48°F (9°C)
Visibility 8.00 mi
Last update 3 Oct 8:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Scattered showers before noon, then a slight chance of showers after 5pm. Partly sunny, with a high near 66. South wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 66 °F

    Scattered
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. South wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Low: 46 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 65. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 33. Calm wind.

    Low: 33 °F

    Clear then
    Patchy Frost

  • Monday

    Monday: Patchy frost before 8am. Otherwise, sunny, with a high near 65. Calm wind.

    High: 65 °F

    Patchy Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69. South wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. Southwest wind 3 to 8 mph. Winds could gust as high as 23 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Scattered showers before noon, then a slight chance of showers after 5pm. Partly sunny, with a high near 66. South wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tonight
A 30 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 46. South wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly sunny, with a high near 65. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 33. Calm wind.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 65. Calm wind.
Monday Night
Mostly clear, with a low around 41. Calm wind.
Tuesday
Sunny, with a high near 69. South wind 5 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 49. Southwest wind 3 to 8 mph. Winds could gust as high as 23 mph.
Wednesday
Sunny, with a high near 72. Calm wind becoming west 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 45. Calm wind.
Thursday
Mostly sunny, with a high near 69. Calm wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 44. Calm wind.
Friday
Sunny, with a high near 69. Calm wind becoming southwest 5 to 7 mph in the afternoon.
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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:
7:41 am CDT Oct 3, 2026
Forecast Valid:
9am CDT Oct 3, 2026-6pm CDT Oct 9, 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