163
FNUS52 KKEY 200901
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
501 AM EDT Sun Sep 20 2026

.Discussion...
An upper level low will linger in the eastern Gulf waters into
early next week. This system will continue to maintain a wet
weather pattern across the Keys over the coming days. Daily rain
chances will remain well above normal with rain chances peaking
around 60% to 70% and RH values bottoming out in the mid 60s in
the afternoon and recover into the 80s overnight. Surface winds
will be light to gentle mostly out of the southeast to south for
the remainder of the weekend and into the new week. Rain chances
will also continue to remain elevated into next week, as deep
moisture lingers across the Florida Keys in the wake of the
departing weather disturbance.

FLZ076>078-202330-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
501 AM EDT Sun Sep 20 2026

                      Today        Tonight      Mon

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     70           60           50
Chance of Thunder (%) 50           50           50
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          89           78           89
Min/Max RH %          68           90           67
Wind 20ft AM (mph)    Lgt/Var                   S  6
Wind 20ft PM (mph)    Lgt/Var      Lgt/Var      SW  6
Precip Duration       8            9            4
Precip Begin          6 AM         Continuing   Continuing
Precip End            Continuing   Continuing   Continuing
Precip Amount         0.13         0.21         0.36
Mixing Hgt(ft-agl)    2800         600          2700
Transport Wnd (mph)   S  5         SE  5        SW  9
Dispersion Index      12           5            23
Max LVORI             5            5            5

Remarks...None.

$$

.FORECAST FOR DAYS 3 THROUGH 7...
.MONDAY NIGHT...Mostly cloudy with showers likely and a chance of
thunderstorms. Lows around 80. Southwest winds around 5 mph.
.TUESDAY...Partly sunny with showers likely and a chance of
thunderstorms. Highs in the upper 80s. South winds around 5 mph.
.TUESDAY NIGHT...Mostly cloudy with showers likely and a chance
of thunderstorms. Lows around 80. Southeast winds around 10 mph.
.WEDNESDAY...Mostly cloudy with showers likely and a chance of
thunderstorms. Highs in the upper 80s. South winds around 5 mph.
.WEDNESDAY NIGHT...Mostly cloudy with showers likely and a chance
of thunderstorms. Lows around 80. South winds around 5 mph.
.THURSDAY...Partly sunny with showers likely and a chance of
thunderstorms. Highs in the upper 80s. South winds around 5 mph.
.THURSDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Lows around 80. Southeast winds around 5 mph.
.FRIDAY...Mostly sunny with a chance of showers and
thunderstorms. Highs in the upper 80s. North winds around 5 mph.
.FRIDAY NIGHT...Partly cloudy with a chance of showers and
thunderstorms. Lows around 80. North winds around 5 mph.
.SATURDAY...Mostly sunny with showers likely and a chance of
thunderstorms. Highs in the upper 80s. North winds around 5 mph.

$$