879  
CXGM50 PGUM 030244  
CLMGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
1244 PM CHST THU JUL 03 2025  
   
...............................  
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JUNE 2025...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1945 TO 2025  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................  
 
TEMPERATURE (F)  
RECORD  
HIGH 95 06/30/1969  
LOW 70 06/22/1966  
06/14/1958  
06/12/1949  
HIGHEST 90 06/16 90 06/10  
06/07  
LOWEST 73 06/06 73 06/14  
AVG. MAXIMUM 86.7 88.7 -2.0 87.2  
AVG. MINIMUM 76.8 78.1 -1.3 77.6  
MEAN 81.7  
DAYS MAX >= 90 2 10.5 -8.5 1  
DAYS MAX <= 32 0 0.0 0.0 0  
DAYS MIN <= 32 0 0.0 0.0 0  
DAYS MIN <= 0 0 0.0 0.0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 38.03 2004 (18.48" DURING TY TINGTING)  
MINIMUM 0.83 1983  
TOTALS 13.50 6.51 6.99 8.00  
DAILY AVG. 0.45 0.22 0.23 0.27  
DAYS >= .01 23 23.2 -0.2 28  
DAYS >= .10 15 14.0 1.0 17  
DAYS >= .50 7 4.0 3.0 5  
DAYS >= 1.00 3 1.2 1.8 3  
DAYS >= 3.00 1 0  
GREATEST  
24 HR. TOTAL 5.37 06/26 TO 06/26 1.38 06/12  
 
DEGREE DAYS  
COOLING TOTAL 509 552 -43 531  
SINCE 1/1 3073 3064 9 3012  
 
FREEZE DATES   
............................................................  
 
WIND (MPH)  
AVERAGE WIND SPEED 7.5  
RESULTANT WIND SPEED/DIRECTION 6/100  
HIGHEST WIND SPEED/DIRECTION 27/110 DATE 06/25  
HIGHEST GUST SPEED/DIRECTION 38/100 DATE 06/25  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.35  
NUMBER OF DAYS FAIR 17  
NUMBER OF DAYS PC 10  
NUMBER OF DAYS CLOUDY 1  
 
AVERAGE RH (PERCENT) 81  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 1 HEAVY RAIN 9  
RAIN 11 LIGHT RAIN 27  
FOG 0 HAZE 0  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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