633
CDUS42 KKEY 180535
CLIMTH
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
135 AM EDT THU SEP 18 2025
...............................
..THE MARATHON CLIMATE SUMMARY FOR SEPTEMBER 17 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 97 2023 90 MM 89
MINIMUM MM MM 71 1957 78 MM 82
AVERAGE MM 84 MM 86
PRECIPITATION (IN)
YESTERDAY 0.37 2.17 2022 0.22 0.15 0.02
MONTH TO DATE 5.74 3.50 2.24 0.79
SINCE SEP 1 5.74 3.50 2.24 0.79
SINCE JAN 1 22.34 26.96 -4.62 35.92
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 19 MM 21
MONTH TO DATE 272 333 -61 378
SINCE SEP 1 272 333 -61 378
SINCE JAN 1 3820 3803 17 4046
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 7.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 77
LOWEST 63
AVERAGE 70
......................................................
THE MARATHON CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 90 95 1989
MINIMUM TEMPERATURE (F) 78 68 1956
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 712 AM EDT SUNSET 725 PM EDT
SEPTEMBER 19 2025.....SUNRISE 712 AM EDT SUNSET 724 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page