029
CDUS41 KOKX 152134
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
434 PM EST MON DEC 15 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 15 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 29 350 PM 62 2015 45 -16 42
MINIMUM 19 732 AM 11 1968 30 -11 20
AVERAGE 24 37 -13 31
PRECIPITATION (IN)
TODAY 0.00 1.55 2013 0.16 -0.16 0.00
MONTH TO DATE 1.80 2.35 -0.55 2.43
SINCE DEC 1 1.80 2.35 -0.55 2.43
SINCE JAN 1 34.94 43.63 -8.69 45.00
SNOWFALL (IN)
TODAY 0.0 2.0 1968 0.2 -0.2 0.0
MONTH TO DATE 5.8 1.5 4.3 T
SINCE DEC 1 5.8 1.5 4.3 T
SINCE JUL 1 5.8 2.0 3.8 T
SNOW DEPTH 6
DEGREE DAYS
HEATING
TODAY 41 28 13 34
MONTH TO DATE 465 390 75 431
SINCE DEC 1 465 390 75 431
SINCE JUL 1 1254 1329 -75 1121
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 (330)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 15.4
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 59 500 AM
LOWEST 46 100 PM
AVERAGE 53
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 44 64 1971
MINIMUM TEMPERATURE (F) 30 10 1968
1988
SUNRISE AND SUNSET
DECEMBER 15 2025......SUNRISE 710 AM EST SUNSET 426 PM EST
DECEMBER 16 2025......SUNRISE 710 AM EST SUNSET 426 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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