Wailuku Weather in September

September in Wailuku averages 30°C (86°F) during the day and 24°C (75°F) at night. The perfect 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 perfect, 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.

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• January
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For a detailed overview over the year and the best time to visit the United States of America, check out our Wailuku's climate page.

Wailuku Temperature in September

Min Temperature 24°C (75°F)  

Max Temperature 30°C (86°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 26%  

Precipitation 20 mm (0.8 in)  

Rainy days 8 days  

Humidity 70% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 271 hours *  

Percentage Sunshine 74% *  

* Data from: Kahului, the United States of America (7 KM, 4 Miles).

What to Wear in Wailuku in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. The water temperature sits at about 27°C (81°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Wailuku in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Wailuku's climate page.

More climate data for Wailuku

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Wailuku climate overview or explore weather in the United States of America.