217
CDUS42 KKEY 212018
CLIMTH
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
418 PM EDT SUN SEP 21 2025
...............................
..THE MARATHON CLIMATE SUMMARY FOR SEPTEMBER 21 2025
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM MM MM 96 1987 90 MM 90
MINIMUM MM MM 70 1956 78 MM 78
1959
AVERAGE MM 84 MM 84
PRECIPITATION (IN)
TODAY 0.03 4.44 1959 0.23 -0.20 0.09
MONTH TO DATE 7.22 4.43 2.79 1.70
SINCE SEP 1 7.22 4.43 2.79 1.70
SINCE JAN 1 23.82 27.89 -4.07 36.83
DEGREE DAYS
HEATING
TODAY 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
TODAY MM 19 MM 19
MONTH TO DATE 272 409 -137 454
SINCE SEP 1 272 409 -137 454
SINCE JAN 1 3820 3879 -59 4122
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 7.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 80
LOWEST 70
AVERAGE 75
......................................................
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 2025.....SUNRISE 713 AM EDT SUNSET 721 PM EDT
SEPTEMBER 22 2025.....SUNRISE 713 AM EDT SUNSET 720 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