491
CDGM40 PGUM 170637
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
437 PM CHST WED SEP 17 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 17 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
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)
TODAY
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)
TODAY 0.73 5.63 1972 0.50 0.23 1.10
MONTH TO DATE 8.72 8.83 -0.11 22.12
SINCE SEP 1 8.72 8.83 -0.11 22.12
SINCE JAN 1 64.00 65.46 -1.46 69.34
DEGREE DAYS
HEATING
TODAY 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
TODAY 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 5 RESULTANT WIND DIRECTION SE (130)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SE (140)
AVERAGE WIND SPEED 5.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
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 TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 93 2014
MINIMUM TEMPERATURE (F) 76 68 1957
1965
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 6:10 AM CHST SUNSET 6:21 PM CHST
SEPTEMBER 18 2025.....SUNRISE 6:10 AM CHST SUNSET 6:20 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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