119  
CDGM40 PGUM 121610  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
210 AM CHST WED AUG 13 2025  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 12 2025...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1945 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 88 2:06 PM 91 1985 87 1 89  
1988  
MINIMUM 77 5:02 AM 71 1947 77 0 77  
AVERAGE 83 82 1 83  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 4.53 1974 0.60 -0.57 0.00  
MONTH TO DATE 5.76 6.69 -0.93 6.17  
SINCE JUN 1 32.25 25.45 6.80 21.68  
SINCE JAN 1 47.98 45.66 2.32 38.55  
 
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 18 17 1 18  
MONTH TO DATE 209 204 5 207  
SINCE JUN 1 1243 1298 -55 1284  
SINCE JAN 1 3807 3810 -3 3765    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION E (110)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 5.2  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 12:00 AM  
LOWEST 68 2:00 PM  
AVERAGE 79  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 92 1970  
2018  
MINIMUM TEMPERATURE (F) 77 70 1967  
 
SUNRISE AND SUNSET  
AUGUST 13 2025........SUNRISE 6:08 AM CHST SUNSET 6:43 PM CHST  
AUGUST 14 2025........SUNRISE 6:08 AM CHST SUNSET 6:43 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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