Honolulu Weather in September

In Honolulu, September brings high daytime temperatures around 29°C (84°F), with nights cooling to 24°C (75°F). Some rainfall is to be expected.

Rainfall in Honolulu in September

Typically, you can expect about 9 days of rain this month, with 24 mm (0.9 in) on average. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Honolulu in September

September is a good time to be in Honolulu. Days are excellent, reaching 29°C (84°F), with nights around 24°C (75°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about. It's the warmest month of the year on average, so summer clothing is the way to go.

Sunshine in Honolulu in September

With approximately 279 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Honolulu in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

The water temperature is 27°C (81°F), which most people find very comfortable. A good month for swimming and water sports.

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