177  
CDGM40 PGUM 311617  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
217 AM CHST SUN AUG 01 2021  
   
...............................
 
 
   
..THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR JULY 31 2021
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1945 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 90 10:00 AM 91 1994 87 3 91  
2013  
2020  
MINIMUM 77 4:00 AM 73 1956 76 1 80  
1967  
1969  
AVERAGE 84 82 2 86  
 
PRECIPITATION (IN)  
YESTERDAY 0.68 2.90 1962 0.47 0.21 0.04  
MONTH TO DATE 8.76 12.25 -3.49 8.26  
SINCE JUN 1 13.84 18.76 -4.92 11.66  
SINCE JAN 1 31.82 38.97 -7.15 30.40  
 
SNOWFALL (IN)  
YESTERDAY 0.0  
MONTH TO DATE 0.0  
SINCE JUN 1 0.0  
SINCE JUL 1 0.0  
SNOW DEPTH 0  
 
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 19 17 2 21  
MONTH TO DATE 579 535 44 595  
SINCE JUN 1 1147 1078 69 1186  
SINCE JAN 1 3720 3553 167 3806    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION NW (300)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED 7.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88 10:00 PM  
LOWEST 79 7:00 PM  
AVERAGE 84  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 92 1983  
MINIMUM TEMPERATURE (F) 76 71 1969  
 
SUNRISE AND SUNSET  
AUGUST 1 2021........SUNRISE 6:06 AM CHST SUNSET 6:49 PM CHST  
AUGUST 2 2021........SUNRISE 6:06 AM CHST SUNSET 6:48 PM CHST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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