351
CDUS42 KKEY 110527
CLIMTH
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
127 AM EDT THU SEP 11 2025
...............................
..THE MARATHON CLIMATE SUMMARY FOR SEPTEMBER 10 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1950 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM MM MM 95 1993 90 MM 90
MINIMUM MM MM 67 1953 79 MM 85
AVERAGE MM 84 MM 88
PRECIPITATION (IN)
YESTERDAY 0.01 2.63 1956 0.20 -0.19 0.00
MONTH TO DATE 3.64 2.03 1.61 0.56
SINCE SEP 1 3.64 2.03 1.61 0.56
SINCE JAN 1 20.24 25.49 -5.25 35.69
DEGREE DAYS
HEATING
YESTERDAY MM 0 MM 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY MM 20 MM 23
MONTH TO DATE 108 200 -92 219
SINCE SEP 1 108 200 -92 219
SINCE JAN 1 3656 3670 -14 3887
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 2.6
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST MM
LOWEST MM
AVERAGE MM
......................................................
THE MARATHON CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 90 96 2022
2023
MINIMUM TEMPERATURE (F) 79 69 1956
SUNRISE AND SUNSET
SEPTEMBER 11 2025.....SUNRISE 709 AM EDT SUNSET 732 PM EDT
SEPTEMBER 12 2025.....SUNRISE 709 AM EDT SUNSET 731 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
NOTE: THE FLORIDA KEYS MARATHON INTERNATIONAL AIRPORT ASOS
TEMPERATURE SENSOR IS CURRENTLY OUT OF SERVICE. TECHNICIANS ARE
AWARE OF THE ISSUE AND WILL BE VISITING THE SITE AS SOON AS
POSSIBLE TO RETURN IT TO SERVICE.
MISSING DATA WILL BE BACK-FILLED NEXT WEEK BY READINGS
TAKEN AT THE OFFICIAL BACKUP LOCATION AT THE NWS COOP
SITE AT CURRY HAMMOCK STATE PARK.
MC
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