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.

A Few Clouds

32°C

90°F

Humidity 48%
Wind Speed S 9 km/h
Barometer 1014.0 mb (29.95 in)
Dewpoint 19°C (67°F)
Visibility 16 km
Heat Index34°C (94°F)
Last update 3 Jul 1:55 pm CDT
Extended Forecast for

Tomah WI

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 31. South wind 8 to 10 km/h.

    High: 31 °C

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 20. Calm wind. New rainfall amounts between 1 and 2 cm possible.

    Low: 20 °C

    Heavy Rain

  • Independence Day

    Independence Day: A 20 percent chance of showers and thunderstorms before 8am. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 32. Heat index values as high as 35. Southwest wind 8 to 14 km/h, with gusts as high as 32 km/h.

    High: 32 °C

    Slight Chance
    T-storms and
    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22. South wind 8 to 10 km/h.

    Low: 22 °C

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 29. Southwest wind 11 to 21 km/h, with gusts as high as 37 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

    High: 29 °C

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 19. Southwest wind 8 to 13 km/h becoming northwest after midnight. Winds could gust as high as 29 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    Low: 19 °C

    T-storms
    Likely then
    Showers
    Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 27. North wind 8 to 11 km/h.

    High: 27 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Calm wind.

    Low: 16 °C

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 27. Calm wind.

    High: 27 °C

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 31. South wind 8 to 10 km/h.
Tonight
A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 20. Calm wind. New rainfall amounts between 1 and 2 cm possible.
Independence Day
A 20 percent chance of showers and thunderstorms before 8am. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 32. Heat index values as high as 35. Southwest wind 8 to 14 km/h, with gusts as high as 32 km/h.
Friday Night
Partly cloudy, with a low around 22. South wind 8 to 10 km/h.
Saturday
A slight chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 29. Southwest wind 11 to 21 km/h, with gusts as high as 37 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.
Saturday Night
Showers and thunderstorms likely before 4am, then a chance of showers. Mostly cloudy, with a low around 19. Southwest wind 8 to 13 km/h becoming northwest after midnight. Winds could gust as high as 29 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Sunday
Mostly sunny, with a high near 27. North wind 8 to 11 km/h.
Sunday Night
Partly cloudy, with a low around 16. Calm wind.
Monday
Sunny, with a high near 27. Calm wind.
Monday Night
Partly cloudy, with a low around 17. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 27. Calm wind becoming west 5 to 8 km/h in the morning.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 17. Calm wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 27. Northwest wind 3 to 8 km/h.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.99°N 90.51°W
Last Update:
1:43 pm CDT Jul 3, 2025
Forecast Valid:
2pm CDT Jul 3, 2025-6pm CDT Jul 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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