984
CDUS41 KOKX 182134
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
434 PM EST THU DEC 18 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 18 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 50 259 PM 61 2023 44 6 53
MINIMUM 27 716 AM 13 1980 29 -2 32
AVERAGE 39 36 3 43
PRECIPITATION (IN)
TODAY 0.00 1.65 2023 0.15 -0.15 0.14
MONTH TO DATE 1.80 2.81 -1.01 4.37
SINCE DEC 1 1.80 2.81 -1.01 4.37
SINCE JAN 1 34.94 44.09 -9.15 46.94
SNOWFALL (IN)
TODAY 0.0 5.0 1963 0.1 -0.1 0.0
MONTH TO DATE 5.8 1.9 3.9 T
SINCE DEC 1 5.8 1.9 3.9 T
SINCE JUL 1 5.8 2.4 3.4 T
SNOW DEPTH T
DEGREE DAYS
HEATING
TODAY 26 28 -2 22
MONTH TO DATE 556 474 82 489
SINCE DEC 1 556 474 82 489
SINCE JUL 1 1345 1413 -68 1179
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 16 HIGHEST WIND DIRECTION SE (150)
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SE (150)
AVERAGE WIND SPEED 6.0
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
FOG
HAZE
RELATIVE HUMIDITY (PERCENT)
HIGHEST 92 800 AM
LOWEST 58 1100 AM
AVERAGE 75
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 44 55 2017
MINIMUM TEMPERATURE (F) 29 9 1989
SUNRISE AND SUNSET
DECEMBER 18 2025......SUNRISE 712 AM EST SUNSET 427 PM EST
DECEMBER 19 2025......SUNRISE 712 AM EST SUNSET 427 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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