393
CDUS41 KOKX 201717
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
1217 PM EST SAT DEC 20 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 19 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 59R 1007 AM 59 2025 44 15 47
MINIMUM 34 1157 PM 9 1989 29 5 34
AVERAGE 47 36 11 41
PRECIPITATION (IN)
YESTERDAY 0.68 0.92 1996 0.16 0.52 0.10
MONTH TO DATE 2.48 2.97 -0.49 4.47
SINCE DEC 1 2.48 2.97 -0.49 4.47
SINCE JAN 1 35.62 44.25 -8.63 47.04
SNOWFALL (IN)
YESTERDAY 0.0 9.6 2009 0.2 -0.2 0.0
MONTH TO DATE 5.8 2.1 3.7 T
SINCE DEC 1 5.8 2.1 3.7 T
SINCE JUL 1 5.8 2.6 3.2 T
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 18 29 -11 24
MONTH TO DATE 574 503 71 513
SINCE DEC 1 574 503 71 513
SINCE JUL 1 1363 1442 -79 1203
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 38 HIGHEST WIND DIRECTION S (170)
HIGHEST GUST SPEED 59 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 18.9
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1100 AM
LOWEST 49 1100 PM
AVERAGE 71
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THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 43 58 1999
2002
MINIMUM TEMPERATURE (F) 29 7 1963
SUNRISE AND SUNSET
DECEMBER 20 2025......SUNRISE 713 AM EST SUNSET 428 PM EST
DECEMBER 21 2025......SUNRISE 713 AM EST SUNSET 428 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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