Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
854
CXGM50 PGUM 031231
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
1031 PM CHST MON NOV 03 2025
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...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 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 93 10/23/2018
10/06/1989
10/04/1984
LOW 67 10/16/1966
HIGHEST 89 10/12 89 10/07
10/19 10/13
10/30
LOWEST 72 10/07 74 10/19
10/20
10/21
AVG. MAXIMUM 86.3 87.4 -1.1 86.3
AVG. MINIMUM 76.1 76.8 -0.7 75.8
MEAN 81.2
DAYS MAX >= 90 0 3.9 -3.9 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 26.68 2021
MINIMUM 4.27 1976
TOTALS 15.36 12.73 2.63 18.09
DAILY AVG. 0.50 0.41 0.09 0.58
DAYS >= .01 27 25.4 1.6 27
DAYS >= .10 21 18.0 3.0 19
DAYS >= .50 8 7.8 0.2 11
DAYS >= 1.00 3 3.5 -0.5 7
DAYS >= 3.00 1 2
GREATEST
24 HR. TOTAL 5.59 10/15 TO 10/15 5.14 10/20
DEGREE DAYS
COOLING TOTAL 508 530 -22 508
SINCE 1/1 5126 5160 -34 5120
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 7.6
RESULTANT WIND SPEED/DIRECTION 6/090
HIGHEST WIND SPEED/DIRECTION 24/080 DATE 10/20
HIGHEST GUST SPEED/DIRECTION 37/070 DATE 10/20
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 24
NUMBER OF DAYS PC 7
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 82
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 HEAVY RAIN 11
RAIN 19 LIGHT RAIN 30
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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