866  
CXGM50 PGUM 090723  
CLMGUM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE TIYAN GUAM  
523 PM CHST WED OCT 09 2024  
   
...............................  
 
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1945 TO 2024  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................  
 
TEMPERATURE (F)  
RECORD  
HIGH 94 09/06/2016  
LOW 70 09/13/1992  
09/03/1992  
09/17/1972  
HIGHEST 90 09/07 90 09/15  
LOWEST 73 09/23 74 09/22  
AVG. MAXIMUM 86.9 87.2 -0.3 86.8  
AVG. MINIMUM 76.8 76.3 0.5 76.7  
MEAN 81.8  
DAYS MAX >= 90 1 3.7 -2.7 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 32.24 2013 18.4" DURING TY PABUK  
MINIMUM 3.91 1951  
TOTALS 24.38 15.17 9.21 12.46  
DAILY AVG. 0.81 0.51 0.30 0.42  
DAYS >= .01 24 25.1 -1.1 27  
DAYS >= .10 15 19.3 -4.3 20  
DAYS >= .50 9 8.9 0.1 7  
DAYS >= 1.00 7 4.5 2.5 3  
DAYS >= 3.00 3  
GREATEST  
24 HR. TOTAL 6.01 09/11 TO 09/11 2.74 09/21  
 
SNOWFALL (INCHES)  
TOTALS 0.0  
SINCE 7/1 0.0  
GREATEST  
SNOW DEPTH 0  
 
DEGREE DAYS  
COOLING TOTAL 514 502 12 509  
SINCE 1/1 4612 4630 -18 4495  
 
FREEZE DATES   
............................................................  
 
WIND (MPH)  
AVERAGE WIND SPEED 7.8  
RESULTANT WIND SPEED/DIRECTION 4/120  
HIGHEST WIND SPEED/DIRECTION 31/150 DATE 09/11  
HIGHEST GUST SPEED/DIRECTION 49/150 DATE 09/11  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.38  
NUMBER OF DAYS FAIR 19  
NUMBER OF DAYS PC 8  
NUMBER OF DAYS CLOUDY 3  
 
AVERAGE RH (PERCENT) 84  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 3 HEAVY RAIN 10  
RAIN 16 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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