634
CDUS41 KOKX 210616
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
116 AM EST SUN DEC 21 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 20 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 42 1159 PM 58 1999 43 -1 40
2002
MINIMUM 28 736 AM 7 1963 29 -1 33
AVERAGE 35 36 -1 37
PRECIPITATION (IN)
YESTERDAY 0.00 1.34 1995 0.15 -0.15 0.05
MONTH TO DATE 2.48 3.12 -0.64 4.52
SINCE DEC 1 2.48 3.12 -0.64 4.52
SINCE JAN 1 35.62 44.40 -8.78 47.09
SNOWFALL (IN)
YESTERDAY 0.0 14.3 2009 0.1 -0.1 T
MONTH TO DATE 5.8 2.2 3.6 T
SINCE DEC 1 5.8 2.2 3.6 T
SINCE JUL 1 5.8 2.7 3.1 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 30 29 1 28
MONTH TO DATE 604 532 72 541
SINCE DEC 1 604 532 72 541
SINCE JUL 1 1393 1471 -78 1231
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
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED 44 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 10.1
SKY COVER
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 67 1100 PM
LOWEST 41 100 PM
AVERAGE 54
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 43 60 2018
MINIMUM TEMPERATURE (F) 29 9 2004
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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