534
CDUS41 KOKX 170618
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
218 AM EDT WED SEP 17 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 16 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 76 1044 AM 88 1998 75 1 76
MINIMUM 63 547 AM 44 1964 59 4 54
AVERAGE 70 67 3 65
PRECIPITATION (IN)
YESTERDAY 0.00 2.26 1999 0.13 -0.13 0.00
MONTH TO DATE 1.24 1.85 -0.61 0.06
SINCE SEP 1 1.24 1.85 -0.61 0.06
SINCE JAN 1 25.02 32.15 -7.13 38.93
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 2 10 -8 5
SINCE SEP 1 2 10 -8 5
SINCE JUL 1 2 13 -11 6
COOLING
YESTERDAY 5 3 2 0
MONTH TO DATE 63 78 -15 40
SINCE SEP 1 63 78 -15 40
SINCE JAN 1 991 842 149 961
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WIND (MPH)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 11.4
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 500 AM
LOWEST 41 1100 AM
AVERAGE 66
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THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 87 1991
MINIMUM TEMPERATURE (F) 59 45 1986
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 635 AM EDT SUNSET 658 PM EDT
SEPTEMBER 18 2025.....SUNRISE 636 AM EDT SUNSET 656 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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