Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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CDGM40 PGUM 201609
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
209 AM CHST THU AUG 21 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 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 87 2:33 PM 92 1981 87 0 89
MINIMUM 76 5:57 AM 71 1960 77 -1 78
AVERAGE 82 82 0 84
PRECIPITATION (IN)
YESTERDAY 0.02 4.17 1996 0.57 -0.55 1.77
MONTH TO DATE 8.63 11.45 -2.82 10.08
SINCE JUN 1 35.12 30.21 4.91 25.59
SINCE JAN 1 50.85 50.42 0.43 42.46
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 17 17 0 19
MONTH TO DATE 349 340 9 347
SINCE JUN 1 1383 1434 -51 1424
SINCE JAN 1 3947 3946 1 3905
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 6.9
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST MM
LOWEST MM
AVERAGE MM
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 91 1969
1971
MINIMUM TEMPERATURE (F) 77 71 1960
1991
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 6:09 AM CHST SUNSET 6:39 PM CHST
AUGUST 22 2025........SUNRISE 6:09 AM CHST SUNSET 6:38 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$