425
CDUS41 KOKX 182052
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
452 PM EDT MON AUG 18 2025
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR AUGUST 18 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 78 100 AM 92 2002 81 -3 77
MINIMUM 67 651 AM 52 1979 66 1 69
AVERAGE 73 74 -1 73
PRECIPITATION (IN)
TODAY T 1.91 2017 0.14 -0.14 1.44
MONTH TO DATE 0.15 2.54 -2.39 5.91
SINCE JUN 1 7.67 9.80 -2.13 10.90
SINCE JAN 1 23.40 28.60 -5.20 38.28
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 JUN 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 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 18 31 -13 0
SINCE JUL 1 0 1 -1 0
COOLING
TODAY 8 9 -1 8
MONTH TO DATE 184 172 12 194
SINCE JUN 1 853 636 217 790
SINCE JAN 1 865 665 200 832
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NE (30)
AVERAGE WIND SPEED 12.2
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 88 200 AM
LOWEST 57 300 PM
AVERAGE 73
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 91 2002
MINIMUM TEMPERATURE (F) 66 54 1968
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 606 AM EDT SUNSET 746 PM EDT
AUGUST 19 2025........SUNRISE 607 AM EDT SUNSET 744 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page