575
CXUS52 KKEY 012036
CLMEYW
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
436 PM EDT WED OCT 1 2025
...............................
..THE KEY WEST CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1871 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 95 09/14/2023
09/20/2018
09/03/2007
LOW 69 09/17/1985
09/30/1945
09/02/1898
HIGHEST 92 09/11 94 09/14
LOWEST 75 09/12 76 09/18
09/17
09/18
AVG. MAXIMUM 88.6 89.0 -0.4 90.4
AVG. MINIMUM 79.0 79.2 -0.2 81.9
MEAN 83.8 84.1 -0.3 86.2
DAYS MAX >= 90 8 9.6 -1.6 21
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 18.45 1963
MINIMUM 1.71 1961
TOTALS 9.39 7.24 2.15 3.34
DAILY AVG. 0.31 0.24 0.07 0.11
DAYS >= .01 17 15.8 1.2 10
DAYS >= .10 12 10.2 1.8 8
DAYS >= .50 6 4.0 2.0 2
DAYS >= 1.00 3 1.9 1.1 1
GREATEST
24 HR. TOTAL 2.05 09/06 TO 09/06
DEGREE DAYS
HEATING TOTAL 0 0 0 0
SINCE 7/1 0 0 0 0
COOLING TOTAL 570 573 -3 640
SINCE 1/1 4099 4009 90 4349
............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.0
HIGHEST WIND SPEED/DIRECTION 26/230 DATE 09/04
26/210 09/06
26/110 09/17
HIGHEST GUST SPEED/DIRECTION 37/100 DATE 09/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.26
NUMBER OF DAYS FAIR 23
NUMBER OF DAYS PC 7
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 83
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 16 MIXED PRECIP 0
HEAVY RAIN 10 RAIN 11
LIGHT RAIN 18 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 9 FOG W/VIS <= 1/4 MILE 1
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
KEY WEST DAILY RECORDS, SEPTEMBER 2025 AND 2025-TO-DATE
RECORD SEP 2025 2025
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MAXIMUM TEMPERATURE 0 2
COOL MAXIMUM TEMPERATURE 0 0
WARM MINIMUM TEMPERATURE 3 16
MINIMUM TEMPERATURE 0 0
RAINFALL 0 2
ROSS
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