468
CXUS51 KOKX 012158
CLMISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
557 PM EDT FRI MAY 01 2026
...............................
..THE ISLIP NY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1963 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 94 04/17/2002
LOW 16 04/01/1969
HIGHEST 82 04/16 MM MM 76 04/19
04/28
LOWEST 27 04/09 MM MM 31 04/09
AVG. MAXIMUM 60.0 58.3 1.7 61.3
AVG. MINIMUM 41.5 41.2 0.3 44.3
MEAN 50.8 49.7 1.1 52.8
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 4 3.3 0.7 1
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 9.09 1983
MINIMUM 0.98 1978
TOTALS 2.15 4.06 -1.91 1.98
DAILY AVG. 0.07 0.14 -0.07 0.07
DAYS >= .01 10 11.3 -1.3 12
DAYS >= .10 6 6.8 -0.8 10
DAYS >= .50 1 2.5 -1.5 1
DAYS >= 1.00 1 1.0 0.0 0
GREATEST
24 HR. TOTAL 1.31 04/25 TO 04/26 0.61 03/31 TO 04/01
STORM TOTAL 1.08 0.55
(MM/DD(HH)) MM
SNOWFALL (INCHES)
RECORDS
TOTAL 16.0 1982
24 HR TOTAL 16.0 MM
TOTALS 0.0 0.6 -0.6 0.0
LIQUID EQUIV 0.00 0.00 0.00 0.00
SINCE 7/1 61.8 31.8 30.0 MM
LIQUID 7/1 6.18 3.10 3.08 MM
DAYS >= TRACE 0 0.3 -0.3 0
DAYS >= 1.0 0 0.2 -0.2 0
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL MM MM
STORM TOTAL 0.0 0.0
(MM/DD(HH)) MM
DEGREE DAYS
HEATING TOTAL 433 460 -27 359
SINCE 7/1 5006 4959 47 MM
COOLING TOTAL 11 2 9 0
SINCE 1/1 11 2 9 MM
............................................................
WIND (MPH)
AVERAGE WIND SPEED 8.7
HIGHEST WIND SPEED/DIRECTION 31/110 DATE 04/04
HIGHEST GUST SPEED/DIRECTION 41/100 DATE 04/04
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.59
NUMBER OF DAYS FAIR 4
NUMBER OF DAYS PC 19
NUMBER OF DAYS CLOUDY 7
AVERAGE RH (PERCENT) 69
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 5
LIGHT RAIN 17 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 12 FOG W/VIS <= 1/4 MILE 2
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page