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

25°F

-4°C

Humidity 78%
Wind Speed SW 6 mph
Barometer 30.05 in (1019.2 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 5 Feb 2:55 am CST
Extended Forecast for

Tomah WI

  • Overnight

    Overnight: A 20 percent chance of snow after 4am. Cloudy, with a steady temperature around 23. Southwest wind around 6 mph.

    Low: 23 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly before 8am. Mostly cloudy, with a high near 34. Southwest wind 6 to 9 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 34 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A slight chance of freezing rain before 1am, then snow and freezing rain likely. Cloudy, with a low around 28. West wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Wintry
    Mix Likely

  • Friday

    Friday: A 20 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 35. Breezy, with a northwest wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 35 °F

    Slight Chance
    Snow then
    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 2. North wind 5 to 10 mph becoming light northeast after midnight. Winds could gust as high as 22 mph.

    Low: 2 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 23. Calm wind becoming south around 6 mph in the afternoon.

    High: 23 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 15. Southeast wind 3 to 5 mph.

    Low: 15 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 37. Light southeast wind.

    High: 37 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20. Calm wind.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow after 4am. Cloudy, with a steady temperature around 23. Southwest wind around 6 mph.
Thursday
A 30 percent chance of snow, mainly before 8am. Mostly cloudy, with a high near 34. Southwest wind 6 to 9 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A slight chance of freezing rain before 1am, then snow and freezing rain likely. Cloudy, with a low around 28. West wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.
Friday
A 20 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 35. Breezy, with a northwest wind 10 to 16 mph, with gusts as high as 28 mph.
Friday Night
Mostly clear, with a low around 2. North wind 5 to 10 mph becoming light northeast after midnight. Winds could gust as high as 22 mph.
Saturday
Partly sunny, with a high near 23. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 15. Southeast wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 37. Light southeast wind.
Sunday Night
Partly cloudy, with a low around 20. Calm wind.
Monday
Partly sunny, with a high near 45. Calm wind becoming southwest around 6 mph.
Monday Night
Mostly cloudy, with a low around 27. Light and variable wind becoming northeast around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 40. Northeast wind 5 to 7 mph.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 23. Northeast wind around 6 mph. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 34. Northeast wind around 7 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:
3:16 am CST Feb 5, 2026
Forecast Valid:
3am CST Feb 5, 2026-6pm CST Feb 11, 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