FNUS52 KKEY 020826 FWFKEY Fire Weather Planning Forecast for the Florida Keys National Weather Service Key West FL 426 AM EDT Wed Sep 2 2026 .Discussion... Chances of showers and thunderstorms expected as ample moisture remains across the Keys. Relative humidity values are expected to recover to the upper 80s percent overnight with min RH values in the mid 60s during the afternoon hours. Generally, light to gentle easterly breezes are expected for the next several days, occasionally becoming gentle to moderate breezes. Dispersion indices are expected to be generally poor to fair over the next couple of days. FLZ076>078-030215- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key Largo, Marathon, and Key West 426 AM EDT Wed Sep 2 2026 Today Tonight Thu Cloud Cover Pcldy Pcldy Pcldy Chance Precip (%) 30 40 50 Chance of Thunder (%) 30 40 50 Weather Type Tstms Tstms Tstms Max/Min Temp 91 82 91 Min/Max RH % 65 88 68 Wind 20ft AM (mph) Lgt/Var Lgt/Var Wind 20ft PM (mph) Lgt/Var Lgt/Var Lgt/Var Precip Duration 2 2 2 Precip Begin 6 AM Continuing Continuing Precip End Continuing Continuing Continuing Precip Amount 0.05 0.02 0.01 Mixing Hgt(ft-agl) 2900 1700 2800 Transport Wnd (mph) E 3 SE 7 E 5 Dispersion Index 15 6 16 Max LVORI 4 5 4 Remarks...None. $$ .FORECAST FOR DAYS 3 THROUGH 7... .THURSDAY NIGHT...Partly cloudy with showers likely and a chance of thunderstorms. Lows in the lower 80s. East winds around 5 mph. .FRIDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Southeast winds around 5 mph. .FRIDAY NIGHT...Partly cloudy with showers likely and a chance of thunderstorms. Lows in the lower 80s. East winds around 5 mph. .SATURDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. East winds around 5 mph. .SATURDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 5 mph. .SUNDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Southeast winds around 5 mph. .SUNDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 5 mph. .MONDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Southeast winds around 5 mph. .MONDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. Southeast winds around 5 mph. .TUESDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. Southeast winds around 5 mph. $$