Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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080
CDGM40 PGUM 181601
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
201 AM CHST TUE AUG 19 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 18 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 90 1:11 PM 92 1992 87 3 88
MINIMUM 77 9:06 PM 71 1990 77 0 77
AVERAGE 84 82 2 83
PRECIPITATION (IN)
YESTERDAY 0.41 2.97 1997 0.59 -0.18 0.18
MONTH TO DATE 7.32 10.31 -2.99 8.31
SINCE JUN 1 33.81 29.07 4.74 23.82
SINCE JAN 1 49.54 49.28 0.26 40.69
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 0 0 0 0
SINCE JUL 1 0 0 0 0
COOLING
YESTERDAY 19 17 2 18
MONTH TO DATE 316 306 10 309
SINCE JUN 1 1350 1400 -50 1386
SINCE JAN 1 3914 3912 2 3867
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 11.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 9:00 PM
LOWEST 62 2:00 PM
AVERAGE 78
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 91 1969
1988
MINIMUM TEMPERATURE (F) 77 71 1964
SUNRISE AND SUNSET
AUGUST 19 2025........SUNRISE 6:09 AM CHST SUNSET 6:40 PM CHST
AUGUST 20 2025........SUNRISE 6:09 AM CHST SUNSET 6:40 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$