Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS42 KKEY 212131
CLIMTH
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
531 PM EDT MON SEP 21 2026
...................................
...THE MARATHON CLIMATE SUMMARY FOR SEPTEMBER 21 2026...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1950 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 87 1055 AM 96 1987 90 -3 90
MINIMUM 80 114 PM 70 1956 78 2 79
1959
AVERAGE 84 84 0 85
PRECIPITATION (IN)
TODAY 0.14 4.44 1959 0.23 -0.09 0.03
MONTH TO DATE 1.73 4.43 -2.70 7.22
SINCE SEP 1 1.73 4.43 -2.70 7.22
SINCE JAN 1 17.60 27.89 -10.29 23.82
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JUL 1 0 0 0 0
COOLING
TODAY 19 19 0 20
MONTH TO DATE 428 409 19 376
SINCE SEP 1 428 409 19 376
SINCE JAN 1 3901 3879 22 3924
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (160)
AVERAGE WIND SPEED 7.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
HEAVY RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90
LOWEST 70
AVERAGE 80
..........................................................
THE MARATHON CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 89 94 1987
MINIMUM TEMPERATURE (F) 78 66 1959
SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE 713 AM EDT SUNSET 722 PM EDT
SEPTEMBER 22 2026.....SUNRISE 713 AM EDT SUNSET 721 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$