Kaanapali
Hawaii, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Kaanapali, HI

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Palm trees on green grass overlooking the famous Kaanapali beach in Hawaii, with clear waters under the partially cloudy skies
Palm trees on green grass overlooking the famous Kaanapali beach in Hawaii, with clear waters under the partially cloudy skies
September is hot and dry with the temperatures in the range of 67°F (19.4°C) to 85°F (29.4°C). Days and nights are of an equal 12-hour duration, while the sun shines for a daily 9 hours.
The skies are partially cloudy at times, but the clouds are mostly white and add to the beautiful scenery in the backdrop of the ocean and the gently rolling hills. September is the driest month of the year in Kaanapali that rarely registers above an inch of rainfall.
The dispersal of the summer crowds is a good reason to visit Kaanapali in September.
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  • The average high temperature in September: 82°F

Warmest months (with the highest average high temperature) are July, August, September and October (82°F).
Months with the lowest average high temperature are January, February and March (77°F).

  • The average low temperature in September: 66°F

The month with the highest average low temperature is August (68°F).
Coldest months (with the lowest average low temperature) are January, February and March (61°F).

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  • The average rainfall in September: 2"

The wettest month (with the highest rainfall) is January (7.4").
The driest month (with the lowest rainfall) is June (1.9").

  • The average rainfall days in September: 7 days

Months with the highest number of rainy days are March and December (12 days).
Months with the lowest number of rainy days are June, August and September (7 days).

  • The average sea temperature in September: 80.2°F

The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (76°F).

  • The average daylight in September: 12h

Months with the longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • The average sunshine in September: 9h

Months with most sunshine are May, June, July, August and September (Average sunshine: 9h).
Months with least sunshine are January, February, November and December (Average sunshine: 7).

  • The average UV index in September: 11

Months with the highest UV index are June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).

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