| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Number of Wet Days (probability of rain on a day)
|Average Sunlight per day
|Average Daylight per day
|Sunny (Cloudy) Daylight Hours
|Sun altitude at solar noon on the 21st day.
- The average temperature in Guam in September is hot at 27.8 °C (82.04 °F).
- Afternoons can be very hot with average high temperatures reaching 30.7 °C (87.3 °F).
- Overnight temperatures are generally fairly hot with an average low of 24.8 °C (76.6 °F).
- The range/ variation of daily mean temperatures in September is 5.9 °C (10.6 °F).
- The weather in September is moist with rain often. A substantial 342.6mm (13.5in) of liquid tumbles across an average of 23 days.
- In September the blue above Guam is slightly fair with on average a mediocre 4:58 of brilliant sunlight per day.
- The shortest day is 12:00 long and the longest day is 12:22 long with an average length of 12:11.
- There are approximately 7:06 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
- It is sunny approximately 41.2% of daylight hours and cloudy 58.8% of daylight hours.
Check the distance to and compare the Guam September averages with somewhere beginning with:
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Weather Trend Graph for September in Guam, Mariana Islands
Navigate to September Weather in Locations Surrounding Guam:
- Chichijima, Japan - 1538 kms (955.7 miles) N
- Minamidaitojima, Japan - 1973 kms (1226 miles) NW
- Yap Island/ Caroline Islands, Pi, United States Of America (Pacific Islands) - 854.8 kms (531.2 miles) WSW
- Koror/ W Caroline Islands, Pi, United States Of America (Pacific Islands) - 1317 kms (818.4 miles) WSW
- Manokwari, Papua, Indonesia - 1988 kms (1235.4 miles) SW
- Sentani/ Jayapura, Papua, Indonesia - 1846.2 kms (1147.3 miles) SSW