Climatological Report (Seasonal)
Issued by NWS Upton, NY

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000
CXUS51 KOKX 011444
CLSISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
937 AM EST FRI DEC 1 2017



...THE ISLIP NY CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2017 TO 11/30/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1963 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              93   09/01/2010
 LOW               11   11/24/1989
HIGHEST            89   09/24        MM      MM
LOWEST             25   11/18        MM      MM
                        11/11
AVG. MAXIMUM     67.3              63.3     4.0
AVG. MINIMUM     50.2              46.7     3.5
MEAN             58.7              55.0     3.7
DAYS MAX >= 90      0               0.2    -0.2
DAYS MAX <= 32      0               0.1    -0.1
DAYS MIN <= 32     10              10.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        18.55   2005
 MINIMUM         4.02   2001
TOTALS          12.97             11.04    1.93     9.02
DAILY AVG.       0.14              0.12    0.02
DAYS >= .01        21              27.4    -6.4
DAYS >= .10        17              17.4    -0.4
DAYS >= .50         8               7.7     0.3
DAYS >= 1.00        3               3.1    -0.1
GREATEST
 24 HR. TOTAL    4.02   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL            7.6   1989
 24 HR TOTAL       MM
TOTALS              T               0.5    -0.5
 LIQUID EQUIV      MM              0.10      MM
SINCE 7/1           T               0.5    -0.5
 LIQUID 7/1        MM
DAYS >= TRACE       1               0.2     0.8
DAYS >= 1.0         0               0.1    -0.1
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL     751              1010    -259
 SINCE 7/1        751              1016    -265
COOLING TOTAL     204               101     103
 SINCE 1/1        972               787     185
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    41/140    DATE  10/29
HIGHEST GUST SPEED/DIRECTION    56/130    DATE  10/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           26
NUMBER OF DAYS PC             35
NUMBER OF DAYS CLOUDY         30

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      15
LIGHT RAIN               33     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                      44     FOG W/VIS <= 1/4 MILE     10
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$



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