FNUS52 KKEY 170855
FWFKEY

Fire Weather Planning Forecast for the Florida Keys
National Weather Service Key West FL
455 AM EDT Thu Sep 17 2026

.Discussion...
An upper level low will approach the Florida peninsula through the
end of the week, and this will bring a wet weather pattern will
persist across the Keys into the weekend. 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 gentle
to moderate out of the northeast to east before easing to light
to gentle late week and into the weekend as winds shift to a more
east to southeast direction.

FLZ076>078-172315-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Including the cities of Key Largo, Marathon, and Key West
455 AM EDT Thu Sep 17 2026

                      Today        Tonight      Fri

Cloud Cover           Pcldy        Pcldy        Pcldy
Chance Precip (%)     60           60           60
Chance of Thunder (%) 50           50           50
Weather Type          Tstms        Tstms        Tstms
Max/Min Temp          90           79           90
Min/Max RH %          68           90           66
Wind 20ft AM (mph)    E  8                      E  5
Wind 20ft PM (mph)    E  8         E  9         Lgt/Var
Precip Duration       9            9            9
Precip Begin          6 AM         Continuing   Continuing
Precip End            Continuing   Continuing   Continuing
Precip Amount         0.11         0.21         0.14
Mixing Hgt(ft-agl)    3400         1400         3200
Transport Wnd (mph)   E 16         E 10         E  7
Dispersion Index      50           18           24
Max LVORI             4            4            4

Remarks...None.

$$

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

$$