Climatological Report (Daily)
Issued by NWS Upton, NY

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148
CDUS41 KOKX 210634
CLIISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
234 AM EDT MON SEP 21 2026

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

...THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 20 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         69   1026 PM  87    1983  74     -5       75
  MINIMUM         60    418 AM  38    1979  58      2       57
  AVERAGE         65                        66     -1       66

PRECIPITATION (IN)
  YESTERDAY        0.24          0.96 1988   0.12   0.12     0.00
  MONTH TO DATE    4.45                      2.36   2.09     1.24
  SINCE SEP 1      4.45                      2.36   2.09     1.24
  SINCE JAN 1     36.08                     32.66   3.42    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                        18    -15        2
  SINCE SEP 1      3                        18    -15        2
  SINCE JUL 1      3                        21    -18        2

 COOLING
  YESTERDAY        0                         3     -3        1
  MONTH TO DATE  111                        90     21       86
  SINCE SEP 1    111                        90     21       86
  SINCE JAN 1    984                       854    130     1014
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     S (190)
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     S (180)
  AVERAGE WIND SPEED     7.7


SKY COVER
  AVERAGE SKY COVER 0.9


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  RAIN
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1000 PM
 LOWEST     72           300 AM
 AVERAGE    86

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


THE ISLIP NY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   73        84      1980
 MINIMUM TEMPERATURE (F)   57        43      1973
                                             1991


SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE   639 AM EDT   SUNSET   651 PM EDT
SEPTEMBER 22 2026.....SUNRISE   640 AM EDT   SUNSET   649 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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