FNUS52 KKEY 130808 FWFKEY Fire Weather Planning Forecast for the Florida Keys National Weather Service Key West FL 408 AM EDT Sun Sep 13 2026 .Discussion... Shower and thunderstorm probability will remain slightly above normal today. Chances should slip back towards normal by tomorrow. Surface conditions will remain seasonable with highs near to slightly above 90 and lows in the lower 80s. RH will bottom out in the mid 60s in the afternoon and recover into the 80s overnight. Light and variable breezes are expected today, giving way to light easterlies tomorrow. FLZ076>078-132330- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key Largo, Marathon, and Key West 408 AM EDT Sun Sep 13 2026 Today Tonight Mon Cloud Cover Mclear Mclear Mclear Chance Precip (%) 50 30 30 Chance of Thunder (%) 50 30 30 Weather Type Tstms Tstms Tstms Max/Min Temp 91 80 91 Min/Max RH % 63 91 63 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 0.13 0.03 0.01 Mixing Hgt(ft-agl) 3500 700 3400 Transport Wnd (mph) E 5 E 5 E 6 Dispersion Index 16 3 21 Max LVORI 5 6 5 Remarks...None. $$ .FORECAST FOR DAYS 3 THROUGH 7... .MONDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 5 mph. .TUESDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. East winds around 5 mph. .TUESDAY NIGHT...Partly cloudy with showers likely and a chance of thunderstorms. Lows in the lower 80s. Northeast winds around 10 mph. .WEDNESDAY...Mostly sunny with a chance of showers and thunderstorms. Highs around 90. East winds around 10 mph. .WEDNESDAY NIGHT...Showers and a chance of thunderstorms. Lows in the lower 80s. East winds around 10 mph. .THURSDAY...Mostly sunny with showers likely and a chance of thunderstorms. Highs in the upper 80s. East winds around 10 mph. .THURSDAY NIGHT...Partly cloudy with showers likely and a chance of thunderstorms. Lows in the lower 80s. East winds around 10 mph. .FRIDAY...Mostly sunny with showers likely and a chance of thunderstorms. Highs in the upper 80s. East winds around 5 mph. .FRIDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds around 5 mph. .SATURDAY...Mostly sunny with showers likely and a chance of thunderstorms. Highs in the upper 80s. Southeast winds around 5 mph. $$