Weather in Guam in Summer
| June | July | August | ||||
| Average day temperature: | 87.7°F | 87.6°F | 87.2°F | |||
| Average night temperature: | 83.0°F | 83.0°F | 82.9°F | |||
| Sea water temperature: | 85.1°F | 85.4°F | 85.5°F | |||
| Number of sunny days: | 5 days | 6 days | 5 days | |||
| Day length: | 12.9 - 12.9 h. | 12.7 - 12.9 h. | 12.4 - 12.7 h. | |||
| Number of rainy days: | 7 days | 14 days | 14 days | |||
| Precipitation totals: | 4.5 in. | 8.5 in. | 9.6 in. | |||
Day & Night air temperature, °F
June
July
August
0
14
28
42
56
70
84
98
112
86.0
86.6
86.7
82.5
82.4
82.2
| Day temperature | Night temperature |
Sea water temperature, °F
June
July
August
0
14
28
42
56
70
84
98
112
85.5
85.4
85.1
Precipitation total, in.
June
July
August
0.0
1.9
3.7
5.6
7.4
9.3
11.2
13.0
14.9
10.9
9.1
5
Sunny, partly cloudy and cloudy days
June
July
August
0
5
10
15
20
25
30
35
18
18
14
12
11
13
1
2
3
| Cloudy days | Partly cloudy days | Sunny days |
Wind speed, mph
June
July
August
0.0
2.0
3.9
5.9
7.9
9.8
11.8
13.7
9.6
10.5
11.5
Average sunny hours
June
July
August
0
7
4.6
4.5
5.4
Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.
Best time for vacation in Guam
Guam on a weather map
Leaflet | Tiles © Esri
Places in Northern Mariana Islands:
Name
°F
24 Hours Forecast
Guam
Local time: 07:48
April 13, sunday
0900
84°F
W
15 mph
15 mph
1200
84°F
W
16 mph
16 mph
1500
84°F
W
15 mph
15 mph
1800
82°F
W
14 mph
14 mph
2100
81°F
W
13 mph
13 mph
April 14, monday
0000
81°F
W
12 mph
12 mph
0300
82°F
SW
11 mph
11 mph
0600
81°F
SW
13 mph
13 mph
