576
CXUS52 KKEY 012036
CLMMTH

CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
436 PM EDT WED OCT 1 2025

...................................

...THE MARATHON CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1950 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             97   09/17/2023
                       09/16/2023
 LOW              66   09/22/1959
                       09/28/1954
                       09/04/1953
HIGHEST           91   09/11                          94  09/12
                       09/25
LOWEST            73   09/13                          77  09/26
AVG. MAXIMUM    88.2               89.9    -1.7     90.3
AVG. MINIMUM    77.9               78.4    -0.5     81.5
MEAN            83.1               84.2    -1.1     85.9
DAYS MAX >= 90     8               19.0   -11.0       19
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       19.59   1959
 MINIMUM        0.22   1961
TOTALS          9.26               6.37    2.89     3.18
DAILY AVG.      0.31               0.21    0.10     0.11
DAYS >= .01       20               15.1     4.9       17
DAYS >= .10       13                9.1     3.9       11
DAYS >= .50        7                3.6     3.4        0
DAYS >= 1.00       5                1.4     3.6        0
GREATEST
 24 HR. TOTAL   1.55   09/17 TO 09/18


DEGREE DAYS
HEATING TOTAL      0                  0       0        0
 SINCE 7/1         0                  0       0        0
COOLING TOTAL    548                574     -26      636
 SINCE 1/1      4096               4044      52     4304
................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    35/300    DATE  09/13
HIGHEST GUST SPEED/DIRECTION    54/300    DATE  09/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.21
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     79

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             23     MIXED PRECIP               0
HEAVY RAIN               11     RAIN                      14
LIGHT RAIN               20     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      1
HAZE                     11

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$


MARATHON DAILY RECORDS, SEPTEMBER 2025 AND 2025-TO-DATE

RECORD                    SEP 2025     2025
======                    ========   ========
MAXIMUM TEMPERATURE           0          0
COOL MAXIMUM TEMPERATURE      1          3
WARM MINIMUM TEMPERATURE      1         18
MINIMUM TEMPERATURE           0          0
RAINFALL                      0          3


ROSS