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

42°F

6°C

Humidity 92%
Wind Speed Calm
Barometer 30.16 in (1022.1 mb)
Dewpoint 40°F (4°C)
Visibility 9.00 mi
Last update 10 Apr 1:55 am CDT
Extended Forecast for

Tomah WI

  • Overnight

    Overnight: A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 55. Northwest wind 3 to 8 mph.

    High: 55 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: 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.

    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

Detailed Forecast

Overnight
A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 32. Calm wind.
Friday
Partly sunny, then gradually becoming sunny, with a high near 55. Northwest wind 3 to 8 mph.
Friday Night
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.
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. 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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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
1:26 am CDT Apr 10, 2026
Forecast Valid:
2am CDT Apr 10, 2026-6pm CDT Apr 16, 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