Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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CDGM40 PGUM 301644
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
244 AM CHST THU JUL 31 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR JULY 30 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 11:13 AM 92 1984 87 0 88
2013
MINIMUM 77 11:59 PM 71 1956 77 0 77
1964
AVERAGE 82 82 0 83
PRECIPITATION (IN)
YESTERDAY 0.85 10.44 2014 0.48 0.37 0.01
MONTH TO DATE 12.97 11.78 1.19 7.18
SINCE JUN 1 26.47 18.29 8.18 15.18
SINCE JAN 1 42.20 38.50 3.70 32.05
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 18
MONTH TO DATE 507 526 -19 528
SINCE JUN 1 1016 1078 -62 1059
SINCE JAN 1 3580 3590 -10 3540
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION W (260)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 4.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 1:00 PM
LOWEST 72 10:00 AM
AVERAGE 83
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 91 1994
2013
2020
MINIMUM TEMPERATURE (F) 77 73 1956
1967
1969
SUNRISE AND SUNSET
JULY 31 2025..........SUNRISE 6:05 AM CHST SUNSET 6:49 PM CHST
AUGUST 1 2025........SUNRISE 6:06 AM CHST SUNSET 6:49 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$