898  
CDUS41 KOKX 170618  
CLIISP  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE NEW YORK, NY  
218 AM EDT SAT APR 17 2021  
   
...............................
 
 
   
..THE ISLIP NY CLIMATE SUMMARY FOR APRIL 16 2021
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1963 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 54 1234 PM 88 2002 58 -4 50  
MINIMUM 39 602 AM 26 1981 41 -2 38  
AVERAGE 47 49 -2 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.12 3.19 1983 0.14 -0.02 0.00  
MONTH TO DATE 2.79 2.41 0.38 2.26  
SINCE MAR 1 6.71 6.85 -0.14 6.46  
SINCE JAN 1 12.78 13.75 -0.97 12.03  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.2 2014 0.1 -0.1 0.0  
MONTH TO DATE T 0.5 -0.5 0.0  
SINCE MAR 1 T 5.0 -5.0 T  
SINCE JUL 1 33.5 24.7 8.8 6.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 18 16 2 21  
MONTH TO DATE 248 291 -43 260  
SINCE MAR 1 940 1088 -148 881  
SINCE JUL 1 4460 4983 -523 4311  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 11.9  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 50 1200 PM  
AVERAGE 75  
   
......................................................
 
 
THE ISLIP NY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 94 2002  
MINIMUM TEMPERATURE (F) 41 30 1971  
2005  
2020  
 
SUNRISE AND SUNSET  
APRIL 17 2021.........SUNRISE 610 AM EDT SUNSET 734 PM EDT  
APRIL 18 2021.........SUNRISE 609 AM EDT SUNSET 735 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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