Weather in Guam in Summer
| June | July | August | ||||
| Average day temperature: | ||||||
| Average day temperature: | 87.3°F | 87.1°F | 86.8°F | |||
| Average night temperature: | ||||||
| Average night temperature: | 82.7°F | 82.7°F | 82.8°F | |||
| Sea water temperature: | ||||||
| Sea water temperature: | 85.0°F | 85.3°F | 85.4°F | |||
| Number of sunny days: | ||||||
| Number of sunny days: | 4 days | 5 days | 4 days | |||
| Day length: | ||||||
| Day length: | 12.9 - 12.9 h. | 12.7 - 12.9 h. | 12.4 - 12.7 h. | |||
| Number of rainy days: | ||||||
| Number of rainy days: | 7 days | 13 days | 13 days | |||
| Precipitation totals: | ||||||
| Precipitation totals: | 4.3 in. | 8.0 in. | 8.8 in. | |||
Day & Night air temperature, °F
Sea water temperature, °F
Precipitation total, in.
Sunny, partly cloudy and cloudy days
Wind speed, mph
Average sunny hours
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
Places in Northern Mariana Islands:
Name
°F
24 Hours Forecast
Guam
Local time: 00:20
September 20, sunday
0300
82°F
S
2 mph
2 mph
0600
82°F
NW
2 mph
2 mph
0900
84°F
N
4 mph
4 mph
1200
84°F
N
4 mph
4 mph
1500
84°F
NE
6 mph
6 mph
1800
82°F
NE
4 mph
4 mph
2100
82°F
NE
4 mph
4 mph
September 21, monday
0000
82°F
NE
4 mph
4 mph
