550
CDGM40 PGUM 301659
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
259 AM CHST WED OCT 01 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 30 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 87 11:48 AM 90 1997 87 0 88
2021
MINIMUM 75 5:05 AM 69 1967 76 -1 80
1968
1989
AVERAGE 81 82 -1 84
PRECIPITATION (IN)
YESTERDAY 0.21 4.31 1980 0.47 -0.26 0.01
MONTH TO DATE 12.34 15.17 -2.83 24.38
SINCE SEP 1 12.34 15.17 -2.83 24.38
SINCE JAN 1 67.62 71.80 -4.18 71.60
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 16 17 -1 19
MONTH TO DATE 490 502 -12 514
SINCE SEP 1 490 502 -12 514
SINCE JAN 1 4619 4630 -11 4612
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WIND (MPH)
RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION W (290)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 3.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 97 5:00 AM
LOWEST 67 12:00 PM
AVERAGE 82
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THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 90 1951
MINIMUM TEMPERATURE (F) 76 69 1968
SUNRISE AND SUNSET
OCTOBER 1 2025.......SUNRISE 6:10 AM CHST SUNSET 6:11 PM CHST
OCTOBER 2 2025.......SUNRISE 6:10 AM CHST SUNSET 6:10 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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