782  
CXGM50 PGUM 040701  
CLMGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
501 PM CHST WED JUN 04 2025  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 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 94 05/30/1971  
LOW 70 05/23/1951  
05/03/1993  
HIGHEST 91 05/24 90 05/17  
LOWEST 75 05/11 75 05/03  
05/24  
AVG. MAXIMUM 88.7 88.6 0.1 87.4  
AVG. MINIMUM 77.9 77.8 0.1 77.8  
MEAN 83.3  
DAYS MAX >= 90 3 8.7 -5.7 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 31.15 2023 (02W TYPHOON MAWAR 24.71")  
MINIMUM 0.40 1987  
TOTALS 1.98 4.45 -2.47 3.82  
DAILY AVG. 0.06 0.14 -0.08 0.12  
DAYS >= .01 21 19.7 1.3 21  
DAYS >= .10 9 9.4 -0.4 8  
DAYS >= .50 0 2.3 -2.3 1  
DAYS >= 1.00 0 0.7 -0.7 1  
DAYS >= 3.00 0  
GREATEST  
24 HR. TOTAL 0.24 05/27 TO 05/27 1.93 05/23  
 
DEGREE DAYS  
COOLING TOTAL 576 564 12 555  
SINCE 1/1 2564 2512 52 2482  
 
FREEZE DATES   
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 10.3  
RESULTANT WIND SPEED/DIRECTION 10/090  
HIGHEST WIND SPEED/DIRECTION 24/070 DATE 05/18  
HIGHEST GUST SPEED/DIRECTION 38/070 DATE 05/14  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.27  
NUMBER OF DAYS FAIR 27  
NUMBER OF DAYS PC 4  
NUMBER OF DAYS CLOUDY 0  
 
AVERAGE RH (PERCENT) 73  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 HEAVY RAIN 3  
RAIN 4 LIGHT RAIN 25  
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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