| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Sea or Water Temp
|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 sea tempeature is 27 °C (80.6 °F).
- The average temperature in Honolulu, Oahu in September is hot at 27.2 °C (80.96 °F).
- Afternoons can be very hot with average high temperatures reaching 31.4 °C (88.5 °F).
- Overnight temperatures are generally fairly hot with an average low of 23.1 °C (73.6 °F).
- The average diurnal temperature variation/ range in September is 8.3 °C (14.9 °F).
- The weather in September is droughty with some rain. A paltry 19.8mm (0.8in) of liquid descends during on average 9 days.
- In September the heavens above Honolulu, Oahu are sunny having on balance a sizable 9:01 of bright sunlight per day.
- The shortest day is 11:56 long and the longest day is 12:32 long with an average length of 12:14.
- There are approximately 3:04 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 74.6% of daylight hours and cloudy 25.4% of daylight hours.
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Weather Trend Graph for September in Honolulu, Oahu, Hawaii
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