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

40°F

4°C

Humidity 80%
Wind Speed Calm
Barometer 30.26 in (1025.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 10 Apr 7:55 am CDT
Extended Forecast for

Tomah WI

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 55. Northwest wind 6 to 9 mph.

    High: 55 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Clear, with a low around 31. Calm wind.

    Low: 31 °F

    Clear

  • Saturday

    Saturday: A 50 percent chance of showers, mainly after 1pm. Increasing clouds, with a high near 58. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 45. Southeast wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 71. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 57. Southwest wind 10 to 15 mph, with gusts as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. Southwest wind 6 to 8 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 56. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 56 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 77. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 77 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 55. Northwest wind 6 to 9 mph.
Tonight
Clear, with a low around 31. Calm wind.
Saturday
A 50 percent chance of showers, mainly after 1pm. Increasing clouds, with a high near 58. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 45. Southeast wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 71. Breezy, with a south wind 11 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 57. Southwest wind 10 to 15 mph, with gusts as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. Southwest wind 6 to 8 mph.
Monday Night
Showers and possibly a thunderstorm. Low around 56. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 77. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 50. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 66. West wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45. West wind 5 to 7 mph becoming south after midnight.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 75. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
5:26 am CDT Apr 10, 2026
Forecast Valid:
8am CDT Apr 10, 2026-6pm CDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

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