242  
CDUS41 KOKX 120629  
CLIISP  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE NEW YORK, NY  
229 AM EDT MON MAY 12 2025  
   
...............................
 
 
   
..THE ISLIP NY CLIMATE SUMMARY FOR MAY 11 2025
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1963 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 78 123 PM 83 1965 67 11 58  
2001  
MINIMUM 50 514 AM 34 1966 49 1 45  
AVERAGE 64 58 6 52  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.71 1967 0.10 -0.10 0.00  
MONTH TO DATE 1.71 1.17 0.54 1.40  
SINCE MAR 1 8.45 9.74 -1.29 14.39  
SINCE JAN 1 12.77 16.69 -3.92 24.11  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 0.0 7.1 -7.1 0.0  
SINCE JUL 1 11.7 31.8 -20.1 10.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 1 7 -6 13  
MONTH TO DATE 30 96 -66 86  
SINCE MAR 1 1003 1336 -333 1111  
SINCE JUL 1 4485 5055 -570 4450  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 2 0 2 1  
SINCE MAR 1 2 2 0 5  
SINCE JAN 1 2 2 0 5    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 6.3  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 74 300 AM  
LOWEST 18 400 PM  
AVERAGE 46  
   
......................................................
 
 
THE ISLIP NY CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 87 1991  
MINIMUM TEMPERATURE (F) 50 37 1969  
1983  
1990  
 
SUNRISE AND SUNSET  
MAY 12 2025...........SUNRISE 538 AM EDT SUNSET 800 PM EDT  
MAY 13 2025...........SUNRISE 537 AM EDT SUNSET 801 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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