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Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

68°F

20°C

Humidity 79%
Wind Speed Calm
Barometer 29.94 in (1013.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 25 Jul 2:55 am CDT
Extended Forecast for

Westby WI

Extreme Heat Watch July 26, 09:00pm until July 27, 09:00pm
Extreme Heat Warning July 26, 12:00pm until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning

  • Overnight

    Overnight: Mostly cloudy, with a low around 62. South wind around 7 mph.

    Low: 62 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 87. Southwest wind 6 to 9 mph.

    High: 87 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 69. Light southwest wind.

    Low: 69 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 105. Southwest wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    High: 93 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. South wind around 8 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 92. Southwest wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. North wind 3 to 8 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. Northwest wind 3 to 5 mph.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 62. South wind around 7 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 87. Southwest wind 6 to 9 mph.
Saturday Night
Increasing clouds, with a low around 69. Light southwest wind.
Sunday
A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 105. Southwest wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Sunday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. South wind around 8 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 92. Southwest wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Monday Night
Mostly clear, with a low around 67. North wind 3 to 8 mph.
Tuesday
Mostly sunny, with a high near 88. Northwest wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 88. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 65. Light southeast wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Light southwest wind.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming west around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westby WI
 43.67°N 90.86°W
Last Update:
2:26 am CDT Jul 25, 2026
Forecast Valid:
3am CDT Jul 25, 2026-6pm CDT Jul 31, 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