Climatological Report (Daily)
Issued by NWS Upton, NY

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918
CDUS41 KOKX 170632
CLIISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
232 AM EDT THU SEP 17 2026

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

...THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 16 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         76    143 PM  88    1998  75      1       76
  MINIMUM         55    555 AM  44    1964  59     -4       63
  AVERAGE         66                        67     -1       70

PRECIPITATION (IN)
  YESTERDAY        T             2.26 1999   0.13  -0.13     0.00
  MONTH TO DATE    4.21                      1.85   2.36     1.24
  SINCE SEP 1      4.21                      1.85   2.36     1.24
  SINCE JAN 1     35.84                     32.15   3.69    25.02

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    3                        10     -7        2
  SINCE SEP 1      3                        10     -7        2
  SINCE JUL 1      3                        13    -10        2

 COOLING
  YESTERDAY        1                         3     -2        5
  MONTH TO DATE   93                        78     15       63
  SINCE SEP 1     93                        78     15       63
  SINCE JAN 1    966                       842    124      991
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     S (190)
  AVERAGE WIND SPEED     5.6


SKY COVER
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           600 AM
 LOWEST     62          1200 PM
 AVERAGE    78

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


THE ISLIP NY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   75        87      1991
 MINIMUM TEMPERATURE (F)   59        45      1986


SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE   635 AM EDT   SUNSET   658 PM EDT
SEPTEMBER 18 2026.....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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