September weather forecast and climate
Hawaii, USA

Flag of Hawaii, USA
Flag of Hawaii, USA

Weather in September

September is a summer month with the heat in the average 75°F (23.9°C) to 84°F (28.9°C) range with very few days of 90°F (32.2°C). While the temperatures in the low lands are sunny, the mountain slopes exposed to the trade winds see low temperatures in the average range of 32°F (0°C) to 55°F (12.8°C).
The active volcanoes around Hawaii, such as Molokini, attract many tourists, as do the tropical rainforests of the highlands - September days are perfect for such hikes as the rainfall is relatively smaller than the wet season and the temperatures are comfortable although nights are usually almost freezing. Keep in mind that temperatures decrease with a rise in elevation and plan to return by the end of daylight. Winds are less troublesome on the leeward sides of the mountains and at higher altitudes. Spectacular views of the surrounding landscape abound from the mountain peaks, which is worth the efforts of hours of ascent in the backdrop of the sunny weather.


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