Climatological Report (Daily)
Issued by NWS Upton, NY

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623
CDUS41 KOKX 190617
CLIISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
217 AM EDT WED AUG 19 2026

...................................

...THE ISLIP NY CLIMATE SUMMARY FOR AUGUST 18 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         85    128 PM  92    2002  81      4       78
  MINIMUM         69    517 AM  52    1979  66      3       60
  AVERAGE         77                        74      3       69

PRECIPITATION (IN)
  YESTERDAY        T             1.91 2017   0.14  -0.14      T
  MONTH TO DATE    3.35                      2.54   0.81     0.15
  SINCE JUN 1     11.78                      9.80   1.98     7.67
  SINCE JAN 1     27.04                     28.60  -1.56    23.40

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 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
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1     10                        31    -21       18
  SINCE JUL 1      0                         1     -1        0

 COOLING
  YESTERDAY       12                         9      3        4
  MONTH TO DATE  218                       172     46      180
  SINCE JUN 1    718                       636     82      849
  SINCE JAN 1    773                       665    108      861
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     S (170)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     S (170)
  AVERAGE WIND SPEED     4.3


SKY COVER
  AVERAGE SKY COVER 0.7


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           200 AM
 LOWEST     57           100 PM
 AVERAGE    79

..........................................................


THE ISLIP NY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   81        91      2002
 MINIMUM TEMPERATURE (F)   66        54      1968


SUNRISE AND SUNSET
AUGUST 19 2026........SUNRISE   607 AM EDT   SUNSET   745 PM EDT
AUGUST 20 2026........SUNRISE   608 AM EDT   SUNSET   743 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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