National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Light Rain

52°F

11°C

Humidity 93%
Wind Speed E 3 mph
Barometer 29.83 in (1010.6 mb)
Dewpoint 50°F (10°C)
Visibility 7.00 mi
Last update 17 May 12:55 pm CDT
Extended Forecast for

Tomah WISimilar City Names

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 70. East wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 61. East wind 7 to 13 mph becoming south after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers

  • Monday

    Monday: Scattered showers and thunderstorms, mainly after 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. Southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Scattered
    Showers then
    Scattered
    T-storms

  • Monday Night

    Monday Night: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 55. South wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Showers

  • Tuesday

    Tuesday: Isolated showers and thunderstorms before 10am, then isolated showers between 10am and 1pm. Mostly cloudy, with a high near 66. Breezy, with a northwest wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 66 °F

    Isolated
    T-storms then
    Isolated
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. Northwest wind 5 to 11 mph, with gusts as high as 23 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62. North wind 3 to 6 mph.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 66. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 66 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 70. East wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 61. East wind 7 to 13 mph becoming south after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Scattered showers and thunderstorms, mainly after 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. Southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 10pm. Low around 55. South wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Isolated showers and thunderstorms before 10am, then isolated showers between 10am and 1pm. Mostly cloudy, with a high near 66. Breezy, with a northwest wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 40. Northwest wind 5 to 11 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 62. North wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 38. Calm wind.
Thursday
Mostly sunny, with a high near 66. Calm wind becoming southeast 5 to 7 mph in the morning.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 42. Southeast wind 3 to 5 mph.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 71. Southeast wind 5 to 8 mph.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 47. Light east wind.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 76. Southeast wind 3 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WISimilar City Names
 43.99°N 90.51°W
Last Update:
1:27 pm CDT May 17, 2026
Forecast Valid:
1pm CDT May 17, 2026-6pm CDT May 23, 2026
 
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Additional Resources

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Chance of Precipitation