392  
CDUS41 KOKX 200637  
CLIISP  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE NEW YORK, NY  
137 AM EST WED DEC 20 2023  
   
...............................
 
 
   
..THE ISLIP NY CLIMATE SUMMARY FOR DECEMBER 19 2023
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1963 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 45 147 PM 55 2017 44 1 40  
MINIMUM 33 1159 PM 9 1989 29 4 28  
AVERAGE 39 36 3 34  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.92 1996 0.16 -0.16 0.00  
MONTH TO DATE 5.47 2.97 2.50 3.54  
SINCE DEC 1 5.47 2.97 2.50 3.54  
SINCE JAN 1 47.10 44.25 2.85 38.73  
 
SNOWFALL (IN)  
YESTERDAY 0.0 9.6 2009 0.2 -0.2 0.0  
MONTH TO DATE T 2.1 -2.1 0.4  
SINCE DEC 1 T 2.1 -2.1 0.4  
SINCE JUL 1 T 2.6 -2.6 0.4  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 26 29 -3 31  
MONTH TO DATE 410 503 -93 479  
SINCE DEC 1 410 503 -93 479  
SINCE JUL 1 1299 1442 -143 1271  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 955 885 70 1136    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 11.6  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 1200 AM  
LOWEST 47 200 PM  
AVERAGE 59  
   
......................................................
 
 
THE ISLIP NY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 58 1999  
2002  
MINIMUM TEMPERATURE (F) 29 7 1963  
 
SUNRISE AND SUNSET  
DECEMBER 20 2023......SUNRISE 712 AM EST SUNSET 427 PM EST  
DECEMBER 21 2023......SUNRISE 713 AM EST SUNSET 428 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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