Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
694
CXGM50 PGUM 050704
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
504 PM CHST FRI SEP 05 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 70 08/15/1989
08/22/1886
08/13/1967
HIGHEST 90 08/18 89 08/24
08/27
08/28
LOWEST 74 08/19 74 08/17
08/22
08/30
AVG. MAXIMUM 87.1 87.2 -0.1 87.6
AVG. MINIMUM 76.6 76.5 0.1 76.7
MEAN 81.8
DAYS MAX >= 90 1 4.5 -3.5 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 37.32 2004 (7.52" DURING TY CHABA)
MINIMUM 3.91 1965
TOTALS 13.06 17.66 -4.60 14.84
DAILY AVG. 0.42 0.57 -0.15 0.48
DAYS >= .01 27 25.9 1.1 25
DAYS >= .10 20 19.2 0.8 19
DAYS >= .50 12 9.7 2.3 11
DAYS >= 1.00 4 5.2 -1.2 4
DAYS >= 3.00 0 1
GREATEST
24 HR. TOTAL 1.58 08/07 TO 08/07 3.65 08/02
DEGREE DAYS
COOLING TOTAL 531 522 9 540
SINCE 1/1 4129 4128 1 4098
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 6.6
RESULTANT WIND SPEED/DIRECTION 5/090
HIGHEST WIND SPEED/DIRECTION 24/050 DATE 08/21
HIGHEST GUST SPEED/DIRECTION 36/080 DATE 08/18
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 16 LIGHT RAIN 31
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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