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CXGM50 PGUM 060317
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
117 PM CHST TUE JAN 06 2026
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1945 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 91 12/11/2018
12/15/2014
12/03/2012
LOW 68 12/31/1962
HIGHEST 88 12/12 88 12/02
LOWEST 73 12/11 74 12/19
12/29
AVG. MAXIMUM 85.7 86.8 -1.1 86.3
AVG. MINIMUM 76.5 76.8 -0.3 76.5
MEAN 81.1
DAYS MAX >= 90 0 0.9 -0.9 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 25.73 2002 (TYPHOON PONGSONA)
MINIMUM 1.46 2019
TOTALS 8.16 5.30 2.86 4.70
DAILY AVG. 0.26 0.17 0.09 0.15
DAYS >= .01 19 22.7 -3.7 22
DAYS >= .10 10 11.5 -1.5 12
DAYS >= .50 6 2.7 3.3 3
DAYS >= 1.00 3 0.8 2.2 0
DAYS >= 3.00 0
GREATEST
24 HR. TOTAL 2.17 12/22 TO 12/22 1.20
DEGREE DAYS
COOLING TOTAL 506 521 -15 515
SINCE 1/1 6157 6205 -48 6151
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 10.8
RESULTANT WIND SPEED/DIRECTION 10/080
HIGHEST WIND SPEED/DIRECTION 27/070 DATE 12/14
HIGHEST GUST SPEED/DIRECTION 38/090 DATE 12/14
38/090 12/20
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.35
NUMBER OF DAYS FAIR 20
NUMBER OF DAYS PC 11
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 78
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 HEAVY RAIN 8
RAIN 8 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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