537  
CDCA42 TJSJ 200437  
CLISJU  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN JUAN PR  
1237 AM AST MON SEP 20 2021  
   
...............................
 
 
   
..THE SAN JUAN AREA/PR CLIMATE SUMMARY FOR SEPTEMBER 19 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 89 2:09 PM 95 2013 89 0 89  
MINIMUM 77 6:22 AM 71 1950 77 0 79  
AVERAGE 83 83 0 84  
 
PRECIPITATION (IN)  
YESTERDAY 0.45 1.92 2014 0.21 0.24 0.01  
MONTH TO DATE 3.07 4.33 -1.26 2.93  
SINCE SEP 1 3.07 4.33 -1.26 2.93  
SINCE JAN 1 35.00 40.27 -5.27 48.96  
 
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 19  
MONTH TO DATE 383 342 41 368  
SINCE SEP 1 383 342 41 368  
SINCE JAN 1 4332 4153 179 4572    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (40)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88  
LOWEST 61  
AVERAGE 75  
   
......................................................
 
 
THE SAN JUAN AREA/PR CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 89 95 1981  
MINIMUM TEMPERATURE (F) 77 72 1920  
 
SUNRISE AND SUNSET  
SEPTEMBER 20 2021.....SUNRISE 6:13 AM AST SUNSET 6:22 PM AST  
SEPTEMBER 21 2021.....SUNRISE 6:13 AM AST SUNSET 6:21 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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