Wailuku Weather in September

September in Wailuku averages 30°C (86°F) during the day and 24°C (75°F) at night. The excellent conditions and low rainfall make it a solid month to visit.

Rainfall in Wailuku in September

Expect around 8 days of rain based on historical data, with 20 mm (0.8 in) average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Wailuku in September

Wailuku in September is worth a visit. The temperature is excellent, with 30°C (86°F) during the day and 24°C (75°F) at night. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about. These are average temperatures, but occasional heat spikes are possible. Stay comfortable by wearing light clothing and drinking water.

Sunshine in Wailuku in September

The days are predominantly sunny, with an estimated total of around 271 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Wailuku in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

The water is 27°C (81°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

September in Wailuku can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.