744
CDUS41 KOKX 180645
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
245 AM EDT MON MAY 18 2026
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR MAY 17 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 84 MM 85 1974 69 15 75
MINIMUM 57 MM 40 1967 51 6 61
1983
1984
AVERAGE 71 60 11 68
PRECIPITATION (IN)
YESTERDAY 0.00 1.94 1990 0.10 -0.10 0.01
MONTH TO DATE 0.70 1.74 -1.04 2.27
SINCE MAR 1 7.04 10.31 -3.27 9.01
SINCE JAN 1 13.28 17.26 -3.98 13.33
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 MAR 1 0.2 7.1 -6.9 0.0
SINCE JUL 1 61.8 31.8 30.0 11.7
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 6 -6 0
MONTH TO DATE 138 135 3 38
SINCE MAR 1 1288 1375 -87 1011
SINCE JUL 1 5144 5094 50 4493
COOLING
YESTERDAY 6 1 5 3
MONTH TO DATE 6 4 2 9
SINCE MAR 1 17 6 11 9
SINCE JAN 1 17 6 11 9
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (200)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 8.2
SKY COVER
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 500 AM
LOWEST 40 1100 AM
AVERAGE 64
......................................................
THE ISLIP NY CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 69 89 1977
2017
MINIMUM TEMPERATURE (F) 51 38 2003
2023
SUNRISE AND SUNSET
MAY 18 2026...........SUNRISE 532 AM EDT SUNSET 806 PM EDT
MAY 19 2026...........SUNRISE 532 AM EDT SUNSET 807 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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