Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
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CDGM40 PGUM 271616
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
216 AM CHST SUN SEP 28 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 27 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 86 10:11 AM 91 2016 87 -1 88
MINIMUM 75 5:19 AM 67 1968 76 -1 77
AVERAGE 81 82 -1 83
PRECIPITATION (IN)
YESTERDAY T 2.15 1966 0.48 -0.48 T
MONTH TO DATE 11.35 13.74 -2.39 24.35
SINCE SEP 1 11.35 13.74 -2.39 24.35
SINCE JAN 1 66.63 70.37 -3.74 71.57
DEGREE DAYS
HEATING
YESTERDAY 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
YESTERDAY 16 17 -1 18
MONTH TO DATE 443 459 -16 459
SINCE SEP 1 443 459 -16 459
SINCE JAN 1 4572 4587 -15 4557
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION SE (120)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM
AVERAGE WIND SPEED 4.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 4:00 AM
LOWEST 75 11:00 AM
AVERAGE 85
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 90 2016
2018
2020
MINIMUM TEMPERATURE (F) 76 66 1976
SUNRISE AND SUNSET
SEPTEMBER 28 2025.....SUNRISE 6:10 AM CHST SUNSET 6:13 PM CHST
SEPTEMBER 29 2025.....SUNRISE 6:10 AM CHST SUNSET 6:12 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$