Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
799
CXGM50 PGUM 010210
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
1210 PM CHST MON SEP 01 2025
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...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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
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TEMPERATURE (F)
RECORD
HIGH 94 08/30/1994
08/06/1994
LOW 63 08/24/2020
HIGHEST 84 89 08/24
08/27
08/28
LOWEST 76 74 08/17
AVG. MAXIMUM 84.0 87.2 -3.2 87.6
AVG. MINIMUM 76.0 76.5 -0.5 76.7
MEAN 80.0
DAYS MAX >= 90 0 4.5 -4.5 0
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 26.42 2012
MINIMUM 0.01 2022
TOTALS 1.01 17.66 -16.65 14.84
DAILY AVG. 0.42 0.57 -0.15 0.48
DAYS >= .01 1 25.9 -24.9 25
DAYS >= .10 1 19.2 -18.2 19
DAYS >= .50 1 9.7 -8.7 11
DAYS >= 1.00 1 5.2 -4.2 4
DAYS >= %-5.2F 0
GREATEST
24 HR. TOTAL 1.01 08/01 TO 08/01 3.65
DEGREE DAYS
COOLING TOTAL 15 522 -507 540
SINCE 1/1 4130 4128 2 MM
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 6.6
RESULTANT WIND SPEED/DIRECTION 5/090
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.30
NUMBER OF DAYS FAIR 22
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 82
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 HEAVY RAIN 15
RAIN 15 LIGHT RAIN 28
FOG 1 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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