426  
CDGM40 PGUM 170645  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
445 PM CHST FRI SEP 17 2021  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 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 88 12:08 PM 91 1969 87 1 86  
1984  
2018  
MINIMUM 76 3:14 AM 70 1972 76 0 75  
AVERAGE 82 82 0 81  
 
PRECIPITATION (IN)  
TODAY T 4.70 1972 0.50 -0.50 1.42  
MONTH TO DATE 3.62 8.83 -5.21 5.81  
SINCE SEP 1 3.62 8.83 -5.21 5.81  
SINCE JAN 1 50.88 65.46 -14.58 48.89  
 
SNOWFALL (IN)  
TODAY MM  
MONTH TO DATE 0.0  
SINCE SEP 1 0.0  
SINCE JUL 1 0.0  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 17 16 1 16  
MONTH TO DATE 306 272 34 308  
SINCE SEP 1 306 272 34 308  
SINCE JAN 1 4555 4338 217 4679    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 3 RESULTANT WIND DIRECTION SE (130)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 4.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 5:00 AM  
LOWEST 70 2:00 PM  
AVERAGE 80  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 93 2014  
MINIMUM TEMPERATURE (F) 76 73 1956  
1960  
1966  
 
SUNRISE AND SUNSET  
SEPTEMBER 17 2021.....SUNRISE 6:10 AM CHST SUNSET 6:21 PM CHST  
SEPTEMBER 18 2021.....SUNRISE 6:10 AM CHST SUNSET 6:20 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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