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

55°F

13°C

Humidity 81%
Wind Speed Calm
Barometer 30.16 in (1021.8 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 14 Oct 8:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 46. East wind 3 to 6 mph.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 11am. High near 58. East wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before midnight. Low around 37. Northwest wind 6 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: A chance of showers between 7am and 1pm. Mostly cloudy, with a high near 53. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after midnight. Otherwise, mostly clear, with a low around 27. North wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 27 °F

    Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 59. Light southwest wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 59 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35. Southwest wind 6 to 8 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Breezy, with a southwest wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 65 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. Southwest wind 3 to 8 mph. Winds could gust as high as 24 mph.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 46. East wind 3 to 6 mph.
Thursday
Showers, mainly after 11am. High near 58. East wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before midnight. Low around 37. Northwest wind 6 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A chance of showers between 7am and 1pm. Mostly cloudy, with a high near 53. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Widespread frost, mainly after midnight. Otherwise, mostly clear, with a low around 27. North wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 59. Light southwest wind increasing to 6 to 11 mph in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Clear, with a low around 35. Southwest wind 6 to 8 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 65. Breezy, with a southwest wind 10 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 40. Southwest wind 3 to 8 mph. Winds could gust as high as 24 mph.
Monday
Mostly sunny, with a high near 68. Light southwest wind.
Monday Night
Mostly clear, with a low around 39. Calm wind.
Tuesday
Sunny, with a high near 70. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 45. Light south wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 71. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 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:
6:46 pm CDT Oct 14, 2026
Forecast Valid:
10pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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