Climatological Report (Monthly)
Issued by NWS Upton, NY

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000
CXUS51 KOKX 011213
CLMISP

CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
639 AM EST MON JAN 01 2024

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

...THE ISLIP NY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             77   12/07/1998
 LOW                   12/31/1963
HIGHEST           61   12/18         MM      MM       58  12/03
                                                          12/06
                                                          12/23
LOWEST            22   12/23         MM      MM        8  12/24
AVG. MAXIMUM    49.1               44.4     4.7     44.7
AVG. MINIMUM    35.4               29.8     5.6     29.0
MEAN            42.2               37.1     5.1     36.8
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     0                2.9    -2.9        3
DAYS MIN <= 32    11               20.9    -9.9       21
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.91   1996
 MINIMUM        0.90   1985
TOTALS          8.56               4.71    3.85     4.42
DAILY AVG.      0.28               0.15    0.13     0.14
DAYS >= .01        8               11.8    -3.8       11
DAYS >= .10        7                7.8    -0.8        9
DAYS >= .50        5                3.3     1.7        2
DAYS >= 1.00       3                1.4     1.6        1
GREATEST
 24 HR. TOTAL   3.07   12/27 TO 12/28               1.79  12/06 TO 12/07
 STORM TOTAL    3.04                                1.33
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL          25.3   2009
 24 HR TOTAL      MM
TOTALS             T                4.5    -4.5      0.4
 LIQUID EQUIV      T               0.40   -0.40     0.00
SINCE 7/1          T                5.0    -5.0       MM
 LIQUID 7/1    -0.10               0.50   -0.60       MM
DAYS >= TRACE      1                2.6    -1.6        2
DAYS >= 1.0        0                1.5    -1.5        0
GREATEST
 SNOW DEPTH        0                                  MM  MM
 24 HR TOTAL      MM                                  MM
 STORM TOTAL     0.0                                 0.4
 (MM/DD(HH))            MM

DEGREE DAYS
HEATING TOTAL    698                865    -167      867
 SINCE 7/1      1587               1803    -216       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1       955                885      70       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.6
HIGHEST WIND SPEED/DIRECTION    MM        DATE   MM
HIGHEST GUST SPEED/DIRECTION    51/130    DATE  12/18

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.66
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       7
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                      16     FOG W/VIS <= 1/4 MILE      6
HAZE                      1

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

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