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.

Fair

42°F

6°C

Humidity 38%
Wind Speed NW 14 G 22 mph
Barometer 30.03 in (1018.0 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 11 Mar 4:55 pm CDT
Extended Forecast for

Tomah WI

  • Tonight

    Tonight: Mostly clear, with a low around 21. West wind 5 to 8 mph, with gusts as high as 24 mph.

    Low: 21 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of snow between 2pm and 4pm, then a chance of rain. Increasing clouds, with a high near 45. Light and variable wind becoming south 9 to 14 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.

    High: 45 °F

    Sunny then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain before 4am, then snow likely. Patchy blowing snow after 5am. Low around 28. Breezy, with a south wind 16 to 25 mph becoming west after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain and
    Breezy then
    Rain/Snow and
    Patchy
    Blowing Snow

  • Friday

    Friday: Snow likely before 7am. Patchy blowing snow before 8am. Partly sunny, with a high near 40. Windy, with a northwest wind 21 to 28 mph, with gusts as high as 47 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 20 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after 1pm. Mostly cloudy, with a high near 41. Calm wind becoming south around 6 mph in the afternoon.

    High: 41 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Snow. Low around 25. Light east wind increasing to 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 80%.

    Low: 25 °F

    Snow

  • Sunday

    Sunday: Snow. High near 33. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.

    High: 33 °F

    Snow and
    Breezy

  • Sunday Night

    Sunday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 9. Blustery, with a north wind 16 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.

    Low: 9 °F

    Snow Likely
    and Blustery

Detailed Forecast

Tonight
Mostly clear, with a low around 21. West wind 5 to 8 mph, with gusts as high as 24 mph.
Thursday
A slight chance of snow between 2pm and 4pm, then a chance of rain. Increasing clouds, with a high near 45. Light and variable wind becoming south 9 to 14 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Thursday Night
Rain before 4am, then snow likely. Patchy blowing snow after 5am. Low around 28. Breezy, with a south wind 16 to 25 mph becoming west after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday
Snow likely before 7am. Patchy blowing snow before 8am. Partly sunny, with a high near 40. Windy, with a northwest wind 21 to 28 mph, with gusts as high as 47 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Partly cloudy, with a low around 20. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Saturday
A 20 percent chance of snow after 1pm. Mostly cloudy, with a high near 41. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Snow. Low around 25. Light east wind increasing to 6 to 11 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Sunday
Snow. High near 33. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 9. Blustery, with a north wind 16 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 60%.
Monday
Mostly cloudy, with a high near 22. Blustery, with a northwest wind 15 to 17 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around -4. Northwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 21 mph.
Tuesday
Mostly sunny, with a high near 27. West wind 3 to 7 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 11. Light southeast wind.
Wednesday
Mostly cloudy, with a high near 37. Southeast wind 3 to 6 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
4:46 pm CDT Mar 11, 2026
Forecast Valid:
5pm CDT Mar 11, 2026-6pm CDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation