Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
699
CXGM50 PGUM 040825
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
625 PM CHST MON AUG 04 2025
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...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF JULY 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 95 07/18/1969
LOW 69 07/10/2006
HIGHEST 90 07/29 89 07/24
07/27
07/28
LOWEST 74 07/25 74 07/25
07/26
07/27
AVG. MAXIMUM 86.3 87.9 -1.6 87.3
AVG. MINIMUM 77.1 77.1 -0.0 77.3
MEAN 81.7
DAYS MAX >= 90 1 6.8 -5.8 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 29.80 2002 (9.35" TY CHATAAN)
MINIMUM 4.46 1954
TOTALS 12.99 12.25 0.74 7.51
DAILY AVG. 0.42 0.40 0.02 0.24
DAYS >= .01 27 26.0 1.0 29
DAYS >= .10 19 17.8 1.2 23
DAYS >= .50 9 6.7 2.3 4
DAYS >= 1.00 4 3.3 0.7 0
DAYS >= 3.00 0
GREATEST
24 HR. TOTAL 2.04 07/20 TO 07/20 0.89
DEGREE DAYS
COOLING TOTAL 525 542 -17 546
SINCE 1/1 3598 3606 -8 3558
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 6.5
RESULTANT WIND SPEED/DIRECTION 4/140
HIGHEST WIND SPEED/DIRECTION 25/260 DATE 07/27
HIGHEST GUST SPEED/DIRECTION 39/000 DATE 07/25
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.37
NUMBER OF DAYS FAIR 17
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 83
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 HEAVY RAIN 13
RAIN 16 LIGHT RAIN 29
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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