970  
CDGM40 PGUM 161618  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
218 AM CHST TUE AUG 17 2021  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 16 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 88 9:55 AM 91 1966 87 1 86  
MINIMUM 79 9:56 AM 70 1949 76 3 78  
AVERAGE 84 82 2 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.09 4.25 2018 0.61 -0.52 0.96  
MONTH TO DATE 7.81 9.12 -1.31 3.39  
SINCE JUN 1 21.65 27.88 -6.23 15.05  
SINCE JAN 1 39.63 48.09 -8.46 33.79  
 
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 16 3 17  
MONTH TO DATE 284 265 19 303  
SINCE JUN 1 1431 1343 88 1489  
SINCE JAN 1 4004 3818 186 4109    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION E (80)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (80)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 10:00 AM  
LOWEST 75 4:00 PM  
AVERAGE 88  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 91 1964  
1966  
1969  
MINIMUM TEMPERATURE (F) 76 73 1979  
1990  
 
SUNRISE AND SUNSET  
AUGUST 17 2021........SUNRISE 6:08 AM CHST SUNSET 6:41 PM CHST  
AUGUST 18 2021........SUNRISE 6:08 AM CHST SUNSET 6:41 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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