951  
CDGM40 PGUM 171602  
CLIGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
202 AM CHST SAT SEP 18 2021  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 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 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)  
YESTERDAY 0.10 4.70 1972 0.50 -0.40 1.42  
MONTH TO DATE 3.72 8.83 -5.11 5.81  
SINCE SEP 1 3.72 8.83 -5.11 5.81  
SINCE JAN 1 50.98 65.46 -14.48 48.89  
 
SNOWFALL (IN)  
YESTERDAY 0.0  
MONTH TO DATE 0.0  
SINCE SEP 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 SEP 1 0 0 0 0  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 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 2 RESULTANT WIND DIRECTION E (110)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 3.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 7:00 PM  
LOWEST 70 2:00 PM  
AVERAGE 82  
   
......................................................
 
 
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 93 2014  
MINIMUM TEMPERATURE (F) 76 73 1956  
1960  
1966  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2021.....SUNRISE 6:10 AM CHST SUNSET 6:20 PM CHST  
SEPTEMBER 19 2021.....SUNRISE 6:10 AM CHST SUNSET 6:19 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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