216  
CXGM50 PGUM 010010  
CLMGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
1010 AM CHST TUE JUL 01 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 MM  
LOW 71 05/27/2015  
HIGHEST 88 90 05/17  
LOWEST 80 75 05/03  
05/24  
AVG. MAXIMUM 88.0 88.6 -0.6 87.4  
AVG. MINIMUM 80.0 77.8 2.2 77.8  
MEAN 84.0  
DAYS MAX >= 90 0 8.7 -8.7 1  
DAYS MAX <= 32 0 0.0 0.0 0  
DAYS MIN <= 32 0 0.0 0.0 MM  
DAYS MIN <= 0 0 0.0 0.0 MM  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 31.15 2023  
MINIMUM 0.01 2022  
TOTALS 0.02 4.45 -4.43 3.82  
DAILY AVG. 0.06 0.14 -0.08 0.12  
DAYS >= .01 1 19.7 -18.7 21  
DAYS >= .10 0 9.4 -9.4 8  
DAYS >= .50 0 2.3 -2.3 1  
DAYS >= 1.00 0 0.7 -0.7 1  
DAYS >= %-5.2F 0  
GREATEST  
24 HR. TOTAL 0.02 05/01 TO 05/01 1.93  
 
DEGREE DAYS  
COOLING TOTAL 19 564 -545 554  
SINCE 1/1 2564 2512 52 MM  
 
FREEZE DATES   
............................................................  
 
WIND (MPH)  
AVERAGE WIND SPEED 10.3  
RESULTANT WIND SPEED/DIRECTION 10/090  
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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