277  
CDCA42 TJSJ 160420  
CLISJU  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN JUAN PR  
1220 AM AST THU SEP 16 2021  
   
...............................
 
 
   
..THE SAN JUAN AREA/PR CLIMATE SUMMARY FOR SEPTEMBER 15 2021
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1898 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 86 10:18 AM 92 2012 89 -3 90  
2018  
MINIMUM 80 11:59 PM 69 1960 78 2 80  
AVERAGE 83 83 0 85  
 
PRECIPITATION (IN)  
YESTERDAY 0.06 3.82 2004 0.22 -0.16 0.01  
MONTH TO DATE 2.18 3.47 -1.29 2.88  
SINCE SEP 1 2.18 3.47 -1.29 2.88  
SINCE JAN 1 34.11 39.41 -5.30 48.91  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 18 18 0 20  
MONTH TO DATE 308 270 38 286  
SINCE SEP 1 308 270 38 286  
SINCE JAN 1 4257 4081 176 4490    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 3.3  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88  
LOWEST 72  
AVERAGE 80  
   
......................................................
 
 
THE SAN JUAN AREA/PR CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 89 93 1900  
MINIMUM TEMPERATURE (F) 78 69 1929  
 
SUNRISE AND SUNSET  
SEPTEMBER 16 2021.....SUNRISE 6:12 AM AST SUNSET 6:25 PM AST  
SEPTEMBER 17 2021.....SUNRISE 6:12 AM AST SUNSET 6:24 PM AST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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