National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

Key West International Airport (KEYW)

Lat: 24.56°NLon: 81.76°WElev: 3ft.

A Few Clouds

89°F

32°C

Humidity 68%
Wind Speed N 7 mph
Barometer 29.87 in (1012.0 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 6 Sep 4:53 pm EDT
Extended Forecast for

Key West FL

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Partly sunny, with a high near 92. Calm wind. Chance of precipitation is 50%.

    High: 92 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Calm wind becoming south around 5 mph. Chance of precipitation is 40%.

    Low: 81 °F

    Chance
    T-storms

  • Labor Day

    Labor Day: A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph. Chance of precipitation is 40%.

    High: 91 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 40%.

    Low: 82 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 92. East wind around 5 mph becoming calm. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Sunny, with a high near 93. Chance of precipitation is 30%.

    High: 93 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 82. Chance of precipitation is 60%.

    Low: 82 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Partly sunny, with a high near 92. Calm wind. Chance of precipitation is 50%.
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Calm wind becoming south around 5 mph. Chance of precipitation is 40%.
Labor Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. East wind around 5 mph becoming calm. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Sunny, with a high near 93. Chance of precipitation is 30%.
Wednesday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 82. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key West FL
 24.55°N 81.77°W (Elev. 7 ft)
Last Update:
5:15 pm EDT Sep 6, 2026
Forecast Valid:
5pm EDT Sep 6, 2026-6pm EDT Sep 13, 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