382
CDUS41 KOKX 180620
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
220 AM EDT THU SEP 18 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 17 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 73 MM 87 1991 75 -2 79
MINIMUM 64 MM 45 1986 59 5 62
AVERAGE 69 67 2 71
PRECIPITATION (IN)
YESTERDAY 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)
YESTERDAY 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
YESTERDAY 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
YESTERDAY 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
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WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION E (90)
AVERAGE WIND SPEED 10.4
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1000 PM
LOWEST 66 900 AM
AVERAGE 80
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THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 74 85 1965
MINIMUM TEMPERATURE (F) 58 43 1986
1990
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 636 AM EDT SUNSET 656 PM EDT
SEPTEMBER 19 2025.....SUNRISE 637 AM EDT SUNSET 654 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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