037
CDUS41 KOKX 170617
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
117 AM EST WED DEC 17 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 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 34 137 PM 64 1971 44 -10 53
MINIMUM 25 1104 PM 10 1968 30 -5 37
1988
AVERAGE 30 37 -7 45
PRECIPITATION (IN)
YESTERDAY 0.00 1.49 2024 0.15 -0.15 1.49
MONTH TO DATE 1.80 2.50 -0.70 3.92
SINCE DEC 1 1.80 2.50 -0.70 3.92
SINCE JAN 1 34.94 43.78 -8.84 46.49
SNOWFALL (IN)
YESTERDAY 0.0 5.7 2020 0.1 -0.1 0.0
MONTH TO DATE 5.8 1.6 4.2 T
SINCE DEC 1 5.8 1.6 4.2 T
SINCE JUL 1 5.8 2.1 3.7 T
SNOW DEPTH 4
DEGREE DAYS
HEATING
YESTERDAY 35 28 7 20
MONTH TO DATE 500 418 82 451
SINCE DEC 1 500 418 82 451
SINCE JUL 1 1289 1357 -68 1141
COOLING
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION SW (220)
AVERAGE WIND SPEED 6.8
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 71 400 AM
LOWEST 45 1200 PM
AVERAGE 58
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THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 44 62 1984
MINIMUM TEMPERATURE (F) 30 13 1991
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 711 AM EST SUNSET 426 PM EST
DECEMBER 18 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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