332
CDGM40 PGUM 201615
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
215 AM CHST TUE OCT 21 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR OCTOBER 20 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 81 1:58 AM 91 2014 88 -7 85
MINIMUM 75 9:49 AM 66 1965 77 -2 74
AVERAGE 78 82 -4 80
PRECIPITATION (IN)
YESTERDAY 0.89 4.05 2024 0.40 0.49 4.05
MONTH TO DATE 11.99 8.77 3.22 14.23
SINCE SEP 1 24.33 23.94 0.39 38.61
SINCE JAN 1 79.61 80.57 -0.96 85.83
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 13 17 -4 15
MONTH TO DATE 322 340 -18 328
SINCE SEP 1 811 842 -31 842
SINCE JAN 1 4940 4970 -30 4940
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 9.8
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 90 12:00 PM
LOWEST 79 9:00 PM
AVERAGE 85
......................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 90 2012
2014
2016
MINIMUM TEMPERATURE (F) 77 68 1969
1973
1978
SUNRISE AND SUNSET
OCTOBER 21 2025.......SUNRISE 6:12 AM CHST SUNSET 5:58 PM CHST
OCTOBER 22 2025.......SUNRISE 6:13 AM CHST SUNSET 5:58 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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