810
CDGM40 PGUM 210645
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
445 PM CHST TUE OCT 21 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR OCTOBER 21 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 87 12:25 PM 90 2012 88 -1 79
2014
2016
MINIMUM 78 2:35 PM 68 1969 77 1 74
1973
1978
AVERAGE 83 82 1 77
PRECIPITATION (IN)
TODAY 0.03 6.37 1992 0.40 -0.37 1.25
MONTH TO DATE 12.02 9.17 2.85 15.48
SINCE SEP 1 24.36 24.34 0.02 39.86
SINCE JAN 1 79.64 80.97 -1.33 87.08
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 18 17 1 12
MONTH TO DATE 340 357 -17 340
SINCE SEP 1 829 859 -30 854
SINCE JAN 1 4958 4987 -29 4952
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION E (110)
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (140)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION SE (120)
AVERAGE WIND SPEED 8.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 85 12:00 AM
LOWEST 73 1:00 PM
AVERAGE 79
......................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 88 90 1956
1984
2015
MINIMUM TEMPERATURE (F) 77 67 1958
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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