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

62°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 30.24 in (1024.3 mb)
Dewpoint 60°F (16°C)
Visibility 7.00 mi
Last update 18 Sep 12:55 pm CDT
Extended Forecast for

Tomah WI

Flood Watch September 18, 07:00pm until September 19, 01:00pm
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 64. East wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 52. East wind 9 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 67. East wind 6 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 50. Northeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 68. Northeast wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44. East wind around 8 mph, with gusts as high as 21 mph.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 63. East wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 63 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 42. Northeast wind 3 to 7 mph. Winds could gust as high as 18 mph.

    Low: 42 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. East wind 5 to 8 mph.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 64. East wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm. Low around 52. East wind 9 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 67. East wind 6 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 50. Northeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Partly sunny, with a high near 68. Northeast wind 8 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 44. East wind around 8 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy, with a high near 63. East wind 7 to 11 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 42. Northeast wind 3 to 7 mph. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 62. East wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 41. Light northeast wind.
Wednesday
Sunny, with a high near 66. Calm wind becoming east around 5 mph.
Wednesday Night
Partly cloudy, with a low around 44. Calm wind.
Thursday
Mostly sunny, with a high near 69. Calm wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tomah WI
 43.97°N 90.51°W
Last Update:
1:26 pm CDT Sep 18, 2026
Forecast Valid:
1pm CDT Sep 18, 2026-6pm CDT Sep 24, 2026
 
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