780  
CDGM40 PGUM 191602  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
202 AM CHST SUN DEC 20 2020  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR DECEMBER 19 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 3:01 PM 90 1988 86 1 87  
MINIMUM 77 11:12 PM 71 1963 77 0 77  
AVERAGE 82 81 1 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.01 2.82 1969 0.17 -0.16 0.05  
MONTH TO DATE 7.14 3.89 3.25 1.29  
SINCE DEC 1 7.14 3.89 3.25 1.29  
SINCE JAN 1 88.26 95.55 -7.29 91.79  
 
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 17 16 1 17  
MONTH TO DATE 316 312 4 326  
SINCE DEC 1 316 312 4 326  
SINCE JAN 1 6269 5813 456 6218    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 15 RESULTANT WIND DIRECTION E (70)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION E (80)  
AVERAGE WIND SPEED 15.2  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 7:00 AM  
LOWEST 61 1:00 PM  
AVERAGE 73  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 90 1988  
2014  
MINIMUM TEMPERATURE (F) 77 71 1963  
 
SUNRISE AND SUNSET  
DECEMBER 20 2020......SUNRISE 6:38 AM CHST SUNSET 5:58 PM CHST  
DECEMBER 21 2020......SUNRISE 6:39 AM CHST SUNSET 5:59 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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