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: 20:10
August 30, sunday
2100
79°F
SE
16 mph
16 mph
August 31, monday
0000
79°F
E
14 mph
14 mph
0300
79°F
E
12 mph
12 mph
0600
79°F
E
12 mph
12 mph
0900
79°F
E
11 mph
11 mph
1200
79°F
E
11 mph
11 mph
1500
81°F
E
14 mph
14 mph
1800
79°F
E
14 mph
14 mph
