021
CDGM40 PGUM 191630
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
230 AM CHST SAT SEP 20 2025
...............................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 19 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 88 12:36 PM 95 1957 87 1 88
MINIMUM 76 4:39 AM 67 1989 76 0 77
AVERAGE 82 82 0 83
PRECIPITATION (IN)
YESTERDAY 0.13 10.20 2013 0.50 -0.37 0.00
MONTH TO DATE 9.25 9.82 -0.57 22.13
SINCE SEP 1 9.25 9.82 -0.57 22.13
SINCE JAN 1 64.53 66.45 -1.92 69.35
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 17 17 0 18
MONTH TO DATE 312 323 -11 318
SINCE SEP 1 312 323 -11 318
SINCE JAN 1 4441 4451 -10 4416
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION NE (50)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (60)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 9.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
RAIN
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 5:00 AM
LOWEST 67 12:00 PM
AVERAGE 82
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THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 91 1957
1995
MINIMUM TEMPERATURE (F) 76 68 1961
SUNRISE AND SUNSET
SEPTEMBER 20 2025.....SUNRISE 6:10 AM CHST SUNSET 6:19 PM CHST
SEPTEMBER 21 2025.....SUNRISE 6:10 AM CHST SUNSET 6:18 PM CHST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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