318
FNUS52 KKEY 190844
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
444 AM EDT Sat Sep 19 2026

.Discussion...
An upper level low will move across the central Florida peninsula
and eventually into the Eastern Gulf waters later into the
weekend. This system will bring 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 out
of the east to northeast at the start of the weekend before winds
shift to a more east to southeast direction later in the weekend. 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>078-192315-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
444 AM EDT Sat Sep 19 2026

                      Today        Tonight      Sun

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     50           50           50
Chance of Thunder (%) 50           50           50
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          89           78           89
Min/Max RH %          65           91           67
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         0.19         0.12         0.18
Mixing Hgt(ft-agl)    3000         800          2800
Transport Wnd (mph)   NE  5        SE  7        SW  5
Dispersion Index      13           5            15
Max LVORI             5            5            5

Remarks...None.

$$

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

$$