814  
CDGM40 PGUM 171601  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
201 AM CHST FRI DEC 18 2020  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR DECEMBER 17 2020...  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1945 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 87 2:12 PM 90 1984 86 1 87  
MINIMUM 78 11:39 PM 70 1972 77 1 77  
AVERAGE 83 81 2 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 7.23 1997 0.18 -0.16 0.06  
MONTH TO DATE 6.95 3.54 3.41 1.24  
SINCE DEC 1 6.95 3.54 3.41 1.24  
SINCE JAN 1 88.07 95.20 -7.13 91.74  
 
SNOWFALL (IN)  
YESTERDAY 0.0  
MONTH TO DATE 0.0  
SINCE DEC 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 DEC 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 18 16 2 17  
MONTH TO DATE 282 280 2 291  
SINCE DEC 1 282 280 2 291  
SINCE JAN 1 6235 5781 454 6183    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 15 RESULTANT WIND DIRECTION E (70)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 14.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 8:00 AM  
LOWEST 65 1:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 90 2014  
MINIMUM TEMPERATURE (F) 77 71 1985  
 
SUNRISE AND SUNSET  
DECEMBER 18 2020......SUNRISE 6:37 AM CHST SUNSET 5:57 PM CHST  
DECEMBER 19 2020......SUNRISE 6:38 AM CHST SUNSET 5:58 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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