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 Fog/Mist

70°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 29.90 in (1012.5 mb)
Dewpoint 69°F (21°C)
Visibility 5.00 mi
Last update 8 Jun 8:55 pm CDT
Extended Forecast for

Tomah WISimilar City Names

  • Tonight

    Tonight: Showers and thunderstorms before 1am, then a chance of showers. Patchy fog. Low around 64. Light east wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 88. Light northeast wind.

    High: 88 °F

    Areas Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 4am. Increasing clouds, with a low around 67. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: 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 92. Heat index values as high as 99. Breezy, with a south wind 8 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Slight Chance
    T-storms then
    T-storms
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am. Partly cloudy, with a low around 61. Breezy, with a southwest wind 11 to 16 mph becoming light west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    T-storms
    Likely and
    Breezy then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 54. West wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 80. Breezy, with a west wind 7 to 17 mph, with gusts as high as 26 mph.

    High: 80 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 55. Southwest wind 3 to 8 mph. Winds could gust as high as 21 mph.

    Low: 55 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms before 1am, then a chance of showers. Patchy fog. Low around 64. Light east wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Areas of fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 88. Light northeast wind.
Tuesday Night
Showers and thunderstorms likely, mainly before 4am. Increasing clouds, with a low around 67. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
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 92. Heat index values as high as 99. Breezy, with a south wind 8 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am. Partly cloudy, with a low around 61. Breezy, with a southwest wind 11 to 16 mph becoming light west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 54. West wind 6 to 9 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 80. Breezy, with a west wind 7 to 17 mph, with gusts as high as 26 mph.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 55. Southwest wind 3 to 8 mph. Winds could gust as high as 21 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. West wind 6 to 13 mph, with gusts as high as 22 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 53. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 75. Light northwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 50. West wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. Calm wind becoming southwest 5 to 8 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WISimilar City Names
 43.99°N 90.51°W
Last Update:
7:11 pm CDT Jun 8, 2026
Forecast Valid:
9pm CDT Jun 8, 2026-6pm CDT Jun 15, 2026
 
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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