309  
CDGM40 PGUM 180628  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
428 PM CHST TUE MAY 18 2021  
   
...............................
 
 
   
..THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR MAY 18 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 87 1:24 PM 92 1987 89 -2 89  
MINIMUM 78 8:45 AM 74 1985 78 0 81  
1986  
1992  
AVERAGE 83 83 0 85  
 
PRECIPITATION (IN)  
TODAY 0.03 3.39 1977 0.14 -0.11 0.00  
MONTH TO DATE 5.13 2.38 2.75 5.02  
SINCE MAR 1 10.85 8.65 2.20 8.82  
SINCE JAN 1 15.97 18.14 -2.17 15.60  
 
SNOWFALL (IN)  
TODAY 0.0  
MONTH TO DATE 0.0  
SINCE MAR 1 0.0  
SINCE JUL 1 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 18 18 0 20  
MONTH TO DATE 325 324 1 336  
SINCE MAR 1 1379 1341 38 1432  
SINCE JAN 1 2343 2241 102 2370    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION E (80)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 11.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 9:00 AM  
LOWEST 63 1:00 PM  
AVERAGE 77  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 89 92 2001  
MINIMUM TEMPERATURE (F) 78 74 1989  
1992  
1994  
 
SUNRISE AND SUNSET  
MAY 18 2021...........SUNRISE 5:54 AM CHST SUNSET 6:41 PM CHST  
MAY 19 2021...........SUNRISE 5:54 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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