243  
CXGM50 PGUM 031239  
CLMGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
1039 PM CHST SAT MAY 03 2025  
   
...............................
 
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF APRIL 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 96 04/18/1971  
04/01/1990  
LOW 68 04/06/1965  
HIGHEST 89 04/10 90 04/23  
04/21  
04/23  
04/27  
LOWEST 74 04/05 74 04/15  
AVG. MAXIMUM 87.5 88.1 -0.6 87.5  
AVG. MINIMUM 76.6 76.9 -0.3 77.2  
MEAN 82.1  
DAYS MAX >= 90 0 4.4 -4.4 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 15.28 1963 (TY OLIVE (10.53" 2 DAY TOTAL)  
MINIMUM 0.51 1966  
TOTALS 2.41 3.50 -1.09 7.17  
DAILY AVG. 0.08 0.12 -0.04 0.24  
DAYS >= .01 17 18.9 -1.9 19  
DAYS >= .10 10 8.3 1.7 7  
DAYS >= .50 0 1.3 -1.3 1  
DAYS >= 1.00 0 0.5 -0.5 1  
DAYS >= 3.00 0  
GREATEST  
24 HR. TOTAL 0.47 04/17 TO 04/17 5.57 04/24  
 
SNOWFALL (INCHES)  
TOTALS 0.0  
SINCE 7/1 0.0  
GREATEST  
SNOW DEPTH 0  
 
DEGREE DAYS  
COOLING TOTAL 519 525 -6 528  
SINCE 1/1 1988 1948 40 1927  
 
FREEZE DATES   
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 10.4  
RESULTANT WIND SPEED/DIRECTION 10/090  
HIGHEST WIND SPEED/DIRECTION 23/090 DATE 04/30  
HIGHEST GUST SPEED/DIRECTION 34/090 DATE 04/15  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.26  
NUMBER OF DAYS FAIR 26  
NUMBER OF DAYS PC 4  
NUMBER OF DAYS CLOUDY 0  
 
AVERAGE RH (PERCENT) 74  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 HEAVY RAIN 4  
RAIN 7 LIGHT RAIN 19  
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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