311
CXUS51 KOKX 021642
CLSISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
1142 AM EST TUE DEC 02 2025
...............................
...THE ISLIP NY CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2025 TO 11/30/2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 94 09/03/1973
LOW 11 11/24/1989
HIGHEST 85 09/19 MM MM
09/26
LOWEST 29 11/23 MM MM
11/29
AVG. MAXIMUM 66.6 64.2 2.4
AVG. MINIMUM 49.6 47.9 1.7
MEAN 58.1 56.1 2.0
DAYS MAX >= 90 0 0.2 -0.2
DAYS MAX <= 32 0 0.2 -0.2
DAYS MIN <= 32 8 10.1 -2.1
DAYS MIN <= 0 0 0.0 0.0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 19.26 2018
MINIMUM 3.31 1965
TOTALS 9.36 10.98 -1.62 3.70
DAILY AVG. 0.10 0.12 -0.02
DAYS >= .01 27 27.4 -0.4
DAYS >= .10 17 17.1 -0.1
DAYS >= .50 6 7.8 -1.8
DAYS >= 1.00 2 3.0 -1.0
GREATEST
24 HR. TOTAL 2.64
STORM TOTAL 2.60
(MM/DD(HH))
SNOWFALL (INCHES)
RECORDS
TOTAL 7.6 1989
24 HR TOTAL 7.6 11/23/1989 TO 11/23/1989
TOTALS T 0.5 -0.5
LIQUID EQUIV T 0.00 0.00
SINCE 7/1 T 0.5 -0.5
LIQUID 7/1 M
DAYS >= TRACE 1 0.3 0.7
DAYS >= 1.0 0 0.2 -0.2
GREATEST
SNOW DEPTH 0
24 HR TOTAL T 11/11 TO 11/11
STORM TOTAL MM
(MM/DD(HH))
DEGREE DAYS
HEATING TOTAL 789 936 -147
SINCE 7/1 789 939 -150
COOLING TOTAL 176 121 55
SINCE 1/1 1104 885 219
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 9.2
HIGHEST WIND SPEED/DIRECTION 38/280 DATE 11/11
HIGHEST GUST SPEED/DIRECTION 58/280 DATE 11/11
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.54
NUMBER OF DAYS FAIR 25
NUMBER OF DAYS PC 47
NUMBER OF DAYS CLOUDY 19
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 7 RAIN 16
LIGHT RAIN 33 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 SLEET 0
FOG 26 FOG W/VIS <= 1/4 MILE 4
HAZE 8
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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