326
CDUS41 KOKX 212138
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
438 PM EST SUN DEC 21 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 21 2025
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
MAXIMUM 50 1139 AM 60 2018 43 7 33
MINIMUM 39 746 AM 9 2004 29 10 21
AVERAGE 45 36 9 27
PRECIPITATION (IN)
TODAY 0.00 1.81 1973 0.15 -0.15 0.09
MONTH TO DATE 2.48 3.27 -0.79 4.61
SINCE DEC 1 2.48 3.27 -0.79 4.61
SINCE JAN 1 35.62 44.55 -8.93 47.18
SNOWFALL (IN)
TODAY 0.0 2.0 2024 0.2 -0.2 2.0
MONTH TO DATE 5.8 2.4 3.4 2.0
SINCE DEC 1 5.8 2.4 3.4 2.0
SINCE JUL 1 5.8 2.9 2.9 2.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 20 29 -9 38
MONTH TO DATE 624 561 63 579
SINCE DEC 1 624 561 63 579
SINCE JUL 1 1413 1500 -87 1269
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1104 885 219 1012
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 16.9
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 400 AM
LOWEST 32 1100 AM
AVERAGE 52
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 43 61 2013
MINIMUM TEMPERATURE (F) 28 9 1989
SUNRISE AND SUNSET
DECEMBER 21 2025......SUNRISE 713 AM EST SUNSET 428 PM EST
DECEMBER 22 2025......SUNRISE 714 AM EST SUNSET 429 PM EST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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