833
CDUS41 KOKX 172115
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
515 PM EDT WED SEP 17 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 17 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 73 300 PM 87 1991 75 -2 79
MINIMUM 64 MM 45 1986 59 5 62
AVERAGE 69 67 2 71
PRECIPITATION (IN)
TODAY T 2.85 1996 0.13 -0.13 0.00
MONTH TO DATE 1.24 1.98 -0.74 0.06
SINCE SEP 1 1.24 1.98 -0.74 0.06
SINCE JAN 1 25.02 32.28 -7.26 38.93
SNOWFALL (IN)
TODAY 0.0 MM MM 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 0 2 -2 0
MONTH TO DATE 2 12 -10 5
SINCE SEP 1 2 12 -10 5
SINCE JUL 1 2 15 -13 6
COOLING
TODAY 4 3 1 6
MONTH TO DATE 67 81 -14 46
SINCE SEP 1 67 81 -14 46
SINCE JAN 1 995 845 150 967
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 11.9
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 1200 PM
LOWEST 66 900 AM
AVERAGE 75
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 85 1965
MINIMUM TEMPERATURE (F) 58 43 1986
1990
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 635 AM EDT SUNSET 658 PM EDT
SEPTEMBER 18 2025.....SUNRISE 636 AM EDT SUNSET 656 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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