Climatological Report (Daily)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
675
CDGM40 PGUM 171604
CLIGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
204 AM CHST MON AUG 18 2025
...................................
...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR AUGUST 17 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 89 3:14 PM 91 1964 87 2 83
1966
1969
MINIMUM 77 5:14 AM 73 1979 77 0 74
1990
AVERAGE 83 82 1 79
PRECIPITATION (IN)
YESTERDAY 0.24 3.09 2003 0.60 -0.36 0.44
MONTH TO DATE 6.91 9.72 -2.81 8.13
SINCE JUN 1 33.40 28.48 4.92 23.64
SINCE JAN 1 49.13 48.69 0.44 40.51
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 18 17 1 14
MONTH TO DATE 297 289 8 291
SINCE JUN 1 1331 1383 -52 1368
SINCE JAN 1 3895 3895 0 3849
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 9 RESULTANT WIND DIRECTION E (80)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NE (60)
AVERAGE WIND SPEED 10.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 94 6:00 AM
LOWEST 68 3:00 PM
AVERAGE 81
..........................................................
THE GUAM INTERNATIONAL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 87 92 1992
MINIMUM TEMPERATURE (F) 77 71 1990
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.
$$