135  
CDCA42 TJSJ 180415  
CLISJU  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE SAN JUAN PR  
1215 AM AST WED AUG 18 2021  
   
...............................
 
 
   
..THE SAN JUAN AREA/PR CLIMATE SUMMARY FOR AUGUST 17 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 90 2:05 PM 93 1984 89 1 91  
MINIMUM 79 5:43 AM 71 1903 78 1 81  
AVERAGE 85 84 1 86  
 
PRECIPITATION (IN)  
YESTERDAY 0.01 3.00 1903 0.20 -0.19 0.00  
MONTH TO DATE 2.23 3.24 -1.01 1.24  
SINCE JUN 1 18.03 13.92 4.11 15.56  
SINCE JAN 1 31.49 32.89 -1.40 43.78  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 20 18 2 21  
MONTH TO DATE 317 306 11 342  
SINCE JUN 1 1415 1412 3 1543  
SINCE JAN 1 3664 3545 119 3933    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 10.1  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88  
LOWEST 58  
AVERAGE 73  
   
......................................................
 
 
THE SAN JUAN AREA/PR CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 89 94 1991  
MINIMUM TEMPERATURE (F) 78 72 1956  
 
SUNRISE AND SUNSET  
AUGUST 18 2021........SUNRISE 6:07 AM AST SUNSET 6:49 PM AST  
AUGUST 19 2021........SUNRISE 6:07 AM AST SUNSET 6:48 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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