978  
CDGM40 PGUM 201603  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
203 AM CHST MON DEC 21 2020  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR DECEMBER 20 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 88 1:45 PM 90 1988 85 3 87  
2014  
MINIMUM 77 9:34 PM 71 1963 77 0 77  
AVERAGE 83 81 2 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.09 1.22 1990 0.17 -0.08 0.03  
MONTH TO DATE 7.23 4.06 3.17 1.32  
SINCE DEC 1 7.23 4.06 3.17 1.32  
SINCE JAN 1 88.35 95.72 -7.37 91.82  
 
SNOWFALL (IN)  
YESTERDAY 0.0  
MONTH TO DATE 0.0  
SINCE DEC 1 0.0  
SINCE JUL 1 0.0  
SNOW DEPTH MM  
 
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 334 328 6 343  
SINCE DEC 1 334 328 6 343  
SINCE JAN 1 6287 5829 458 6235    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 15 RESULTANT WIND DIRECTION E (70)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION E (80)  
AVERAGE WIND SPEED 15.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 9:00 PM  
LOWEST 63 11:00 AM  
AVERAGE 74  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 90 1983  
MINIMUM TEMPERATURE (F) 77 71 1989  
1991  
 
SUNRISE AND SUNSET  
DECEMBER 21 2020......SUNRISE 6:39 AM CHST SUNSET 5:59 PM CHST  
DECEMBER 22 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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