Climatological Report (Daily)
Issued by NWS Upton, NY

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890
CDUS41 KOKX 130634
CLIISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
234 AM EDT SUN SEP 13 2026

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

...THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 12 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    300 PM  90    2005  76      0       79
  MINIMUM         57    559 AM  45    1993  60     -3       61
  AVERAGE         67                        68     -1       70

PRECIPITATION (IN)
  YESTERDAY        0.00          3.00 1978   0.12  -0.12     0.00
  MONTH TO DATE    1.15                      1.36  -0.21     1.10
  SINCE SEP 1      1.15                      1.36  -0.21     1.10
  SINCE JAN 1     32.78                     31.66   1.12    24.88

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                         1     -1        0
  MONTH TO DATE    0                         5     -5        2
  SINCE SEP 1      0                         5     -5        2
  SINCE JUL 1      0                         8     -8        2

 COOLING
  YESTERDAY        2                         4     -2        5
  MONTH TO DATE   82                        63     19       42
  SINCE SEP 1     82                        63     19       42
  SINCE JAN 1    955                       827    128      970
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    SE (150)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION    SE (150)
  AVERAGE WIND SPEED     5.4


SKY COVER
  AVERAGE SKY COVER 0.5


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    96           200 AM
 LOWEST     50          1000 AM
 AVERAGE    73

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


THE ISLIP NY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        89      2005
 MINIMUM TEMPERATURE (F)   60        48      1973


SUNRISE AND SUNSET
SEPTEMBER 13 2026.....SUNRISE   631 AM EDT   SUNSET   705 PM EDT
SEPTEMBER 14 2026.....SUNRISE   632 AM EDT   SUNSET   703 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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