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

45°F

7°C

Humidity 66%
Wind Speed Calm
Barometer 29.77 in (1008.5 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 10 Mar 2:55 am CDT
Extended Forecast for

Tomah WI

  • Overnight

    Overnight: Partly cloudy, with a low around 34. Northeast wind around 7 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. East wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 50 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain showers, snow showers, and freezing rain before 4am, then a chance of rain showers between 4am and 5am, then a chance of rain and snow showers after 5am. Mostly cloudy, with a low around 29. Northeast wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 29 °F

    Chance Wintry
    Mix

  • Wednesday

    Wednesday: A chance of snow showers before 7am, then snow showers and freezing rain likely between 7am and 8am, then snow showers likely after 8am. Mostly cloudy, with a high near 41. North wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.

    High: 41 °F

    Wintry Mix
    Likely then
    Snow Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 21 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of rain and snow showers between 1pm and 4pm, then a slight chance of rain showers after 4pm. Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain before 1am, then snow likely, possibly mixed with rain. Low around 29. South wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    Low: 29 °F

    Rain then
    Rain/Snow

  • Friday

    Friday: Snow likely, possibly mixed with rain before 7am. Mostly sunny, with a high near 42. Breezy, with a northwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    High: 42 °F

    Breezy.
    Rain/Snow
    Likely then
    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 22. Northwest wind around 6 mph becoming calm in the evening.

    Low: 22 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 34. Northeast wind around 7 mph.
Tuesday
Partly sunny, with a high near 50. East wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of rain showers, snow showers, and freezing rain before 4am, then a chance of rain showers between 4am and 5am, then a chance of rain and snow showers after 5am. Mostly cloudy, with a low around 29. Northeast wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday
A chance of snow showers before 7am, then snow showers and freezing rain likely between 7am and 8am, then snow showers likely after 8am. Mostly cloudy, with a high near 41. North wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.
Wednesday Night
Mostly clear, with a low around 21. Northwest wind 5 to 7 mph becoming calm in the evening.
Thursday
A slight chance of rain and snow showers between 1pm and 4pm, then a slight chance of rain showers after 4pm. Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Thursday Night
Rain before 1am, then snow likely, possibly mixed with rain. Low around 29. South wind 8 to 14 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Friday
Snow likely, possibly mixed with rain before 7am. Mostly sunny, with a high near 42. Breezy, with a northwest wind 13 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 22. Northwest wind around 6 mph becoming calm in the evening.
Saturday
A chance of snow showers before 1pm, then a chance of rain and snow showers. Cloudy, with a high near 41. Southeast wind 5 to 9 mph. Chance of precipitation is 50%.
Saturday Night
Rain and snow showers likely. Cloudy, with a low around 24. East wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.
Sunday
Snow showers likely. Cloudy, with a high near 34. Breezy, with a north wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 9. Northwest wind 10 to 14 mph, with gusts as high as 26 mph.
Monday
Partly sunny, with a high near 24. Northwest wind 9 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:
1:41 am CDT Mar 10, 2026
Forecast Valid:
3am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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