837  
CDGM40 PGUM 170334  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
134 PM CHST MON MAY 17 2021  
   
...............................
 
 
   
..THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR MAY 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 87 2:55 PM 92 1987 89 -2 89  
MINIMUM 77 2:59 AM 73 1982 78 -1 80  
2005  
AVERAGE 82 83 -1 85  
 
PRECIPITATION (IN)  
YESTERDAY 0.09 2.92 1964 0.14 -0.05 0.17  
MONTH TO DATE 5.07 2.11 2.96 4.30  
SINCE MAR 1 10.79 8.38 2.41 8.10  
SINCE JAN 1 15.91 17.87 -1.96 14.88  
 
SNOWFALL (IN)  
YESTERDAY 0.0  
MONTH TO DATE 0.0  
SINCE MAR 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 MAR 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 17 18 -1 20  
MONTH TO DATE 289 288 1 299  
SINCE MAR 1 1343 1305 38 1395  
SINCE JAN 1 2307 2205 102 2333    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION E (80)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 10.9  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 2:00 AM  
LOWEST 63 11:00 AM  
AVERAGE 79  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 89 91 2013  
2014  
2016  
MINIMUM TEMPERATURE (F) 78 72 1966  
 
SUNRISE AND SUNSET  
MAY 17 2021...........SUNRISE 5:54 AM CHST SUNSET 6:40 PM CHST  
MAY 18 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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