550
CDGM40 PGUM 171639
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
239 AM CHST THU SEP 18 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1945 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 85 2:22 PM 91 1952 87 -2 86
1957
2018
MINIMUM 73 2:56 AM 69 1957 76 -3 75
1969
AVERAGE 79 82 -3 81
PRECIPITATION (IN)
YESTERDAY 0.89 5.63 1972 0.50 0.39 1.10
MONTH TO DATE 8.88 8.83 0.05 22.12
SINCE SEP 1 8.88 8.83 0.05 22.12
SINCE JAN 1 64.16 65.46 -1.30 69.34
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE SEP 1 0 0 0 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 14 17 -3 16
MONTH TO DATE 278 289 -11 283
SINCE SEP 1 278 289 -11 283
SINCE JAN 1 4407 4417 -10 4381
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION SE (120)
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION E (110)
AVERAGE WIND SPEED 6.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 6:00 AM
LOWEST 72 3:00 PM
AVERAGE 85
......................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 93 2014
MINIMUM TEMPERATURE (F) 76 68 1957
1965
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 6:10 AM CHST SUNSET 6:20 PM CHST
SEPTEMBER 19 2025.....SUNRISE 6:10 AM CHST SUNSET 6:19 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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