586  
CDGM40 PGUM 130625  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
425 PM CHST WED AUG 13 2025  
   
...............................  
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 13 2025...  
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 88 3:27 PM 92 1970 87 1 89  
2018  
MINIMUM 76 6:14 AM 70 1967 77 -1 78  
AVERAGE 82 82 0 84  
 
PRECIPITATION (IN)  
TODAY 0.12 2.69 2009 0.60 -0.48 0.21  
MONTH TO DATE 5.88 7.29 -1.41 6.38  
SINCE JUN 1 32.37 26.05 6.32 21.89  
SINCE JAN 1 48.10 46.26 1.84 38.76  
 
DEGREE DAYS  
HEATING  
TODAY 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  
TODAY 17 17 0 19  
MONTH TO DATE 226 221 5 226  
SINCE JUN 1 1260 1315 -55 1303  
SINCE JAN 1 3824 3827 -3 3784    
...............................................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION E (100)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED 4.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 7:00 AM  
LOWEST 65 3:00 PM  
AVERAGE 80  
   
......................................................  
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 91 1991  
MINIMUM TEMPERATURE (F) 77 72 1951  
1954  
 
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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