688
CDGM40 PGUM 180647
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
447 PM CHST THU SEP 18 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 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 88 10:42 AM 93 2014 87 1 87
MINIMUM 76 6:14 AM 68 1957 76 0 77
1965
AVERAGE 82 82 0 82
PRECIPITATION (IN)
TODAY 0.24 2.13 2012 0.49 -0.25 0.01
MONTH TO DATE 9.12 9.32 -0.20 22.13
SINCE SEP 1 9.12 9.32 -0.20 22.13
SINCE JAN 1 64.40 65.95 -1.55 69.35
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 17 17 0 17
MONTH TO DATE 295 306 -11 300
SINCE SEP 1 295 306 -11 300
SINCE JAN 1 4424 4434 -10 4398
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION E (70)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 6.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.5
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 2:00 PM
LOWEST 68 11:00 AM
AVERAGE 79
......................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 95 1957
MINIMUM TEMPERATURE (F) 76 67 1989
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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