FNUS52 KKEY 310905 FWFKEY Fire Weather Planning Forecast for the Florida Keys National Weather Service Key West FL 505 AM EDT Sat Oct 31 2026 .Discussion... Rain chances will increase over the course of today and tomorrow as an area of unsettled weather passes by just to the south of the island chain. The heaviest showers should stay just offshore, but we may be brushed by some isolated pockets of rainfall that may lead to a few tenths of an inch. Conditions aren't necessarily favorable for lightning, but we can't rule out the low possibility of infrequent thunderstorms. An increase in moisture will be reflected in the humidity values as minimums will be close to 80% before increasing to near saturation overnight. FLZ076>078-010130- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the cities of Key Largo, Marathon, and Key West 505 AM EDT Sat Oct 31 2026 Today Tonight Sun Cloud Cover Pcldy Pcldy Pcldy Chance Precip (%) 40 60 70 Chance of Thunder (%) 20 20 50 Weather Type Tstms Tstms Tstms Max/Min Temp 84 76 82 Min/Max RH % 77 97 79 Wind 20ft AM (mph) E 8 E 10 Wind 20ft PM (mph) E 8 E 10 E 8 Precip Duration 2 8 9 Precip Begin 6 AM Continuing Continuing Precip End Continuing Continuing Continuing Precip Amount 0.11 0.10 0.27 Mixing Hgt(ft-agl) 2400 800 2400 Transport Wnd (mph) E 17 E 22 E 20 Dispersion Index 39 25 35 Max LVORI 4 4 4 Remarks...None. $$ .FORECAST FOR DAYS 3 THROUGH 7... .SUNDAY NIGHT...Mostly cloudy with showers likely and a chance of thunderstorms. Lows in the mid 70s. East winds around 5 mph. .MONDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. East winds around 5 mph. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. East winds around 10 mph. .TUESDAY...Sunny with a slight chance of showers. Highs in the lower 80s. East winds around 10 mph. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. East winds around 5 mph. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 80s. East winds around 5 mph. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers. Lows in the mid 70s. East winds around 5 mph. .THURSDAY...Sunny with a slight chance of showers and thunderstorms. Highs in the lower 80s. Northeast winds around 5 mph. .THURSDAY NIGHT...Mostly clear. Lows in the mid 70s. Northeast winds around 5 mph. .FRIDAY...Sunny with a slight chance of showers. Highs in the lower 80s. North winds around 5 mph. $$