Climatological Report (Monthly)
Issued by NWS Upton, NY

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000
CXUS51 KOKX 011548
CLMISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
1147 AM EDT SUN OCT 1 2017

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

...THE ISLIP NY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              93   09/01/2010
 LOW               38   09/22/1997
                        09/28/1989
HIGHEST            89   09/24        MM      MM       91  09/09
LOWEST             49   09/02        MM      MM       46  09/26
AVG. MAXIMUM     77.2              73.8     3.4     76.4
AVG. MINIMUM     60.7              57.5     3.2     61.4
MEAN             68.9              65.6     3.3     68.9
DAYS MAX >= 90      0               0.2    -0.2        1
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.46   2008
 MINIMUM         0.81   1985
                        2007
TOTALS           3.99              3.58    0.41     3.05
DAILY AVG.       0.13              0.12    0.01     0.10
DAYS >= .01         5               8.6    -3.6       11
DAYS >= .10         5               5.6    -0.6        6
DAYS >= .50         4               2.6     1.4        2
DAYS >= 1.00        1               1.1    -0.1        1
GREATEST
 24 HR. TOTAL    1.69   09/06 TO 09/06           09/19 TO 09/20
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    09/20(00) TO 09/20(00)
                                                 09/30(00) TO 09/30(00)0
                                                 09/30(00) TO 09/30(00)0

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.0   0
                        0
                        0
 24 HR TOTAL      0.0   MM
TOTALS            0.0               0.0     0.0      0.0
 LIQUID EQUIV    0.00              0.00    0.00     0.00
SINCE 7/1         0.0               0.0     0.0      0.0
 LIQUID 7/1      0.00              0.00    0.00     0.00
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   09/30 TO 09/30           09/30 TO 09/30
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    09/30(00) TO 09/30(00)
                                                 09/30(00) TO 09/30(00)0
                                                 09/30(00) TO 09/30(00)0

DEGREE_DAYS
HEATING TOTAL      25                72     -47       32
 SINCE 7/1         25                77     -52       32
COOLING TOTAL     150                91      59      158
 SINCE 1/1        918               777     141     1105
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
HIGHEST WIND SPEED/DIRECTION    28/040    DATE  09/30
HIGHEST GUST SPEED/DIRECTION    38/350    DATE  09/28

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     76

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      3
HAZE                      0

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

$$



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