Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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943
CDGM40 PGUM 180642
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
442 PM CHST MON AUG 18 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 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 90 1:11 PM 92 1992 87 3 88
MINIMUM 78 5:17 AM 71 1990 77 1 77
AVERAGE 84 82 2 83
PRECIPITATION (IN)
TODAY 0.21 2.97 1997 0.59 -0.38 0.18
MONTH TO DATE 7.12 10.31 -3.19 8.31
SINCE JUN 1 33.61 29.07 4.54 23.82
SINCE JAN 1 49.34 49.28 0.06 40.69
DEGREE DAYS
HEATING
TODAY 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
TODAY 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 12 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION E (70)
AVERAGE WIND SPEED 11.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 88 5:00 AM
LOWEST 62 2:00 PM
AVERAGE 75
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 91 1969
1988
MINIMUM TEMPERATURE (F) 77 71 1964
SUNRISE AND SUNSET
AUGUST 18 2025........SUNRISE 6:08 AM CHST SUNSET 6:41 PM CHST
AUGUST 19 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.
$$