Kapaa Weather in September

September in Kapaa averages 28°C (82°F) during the day and 24°C (75°F) at night. With just 65 mm (2.6 in) of rainfall on average, it doesn't get much drier than this.

Rainfall in Kapaa in September

The month is known for having the least rain of the year. Make the most of the sunshine and clear skies. On average, there are about 16 days with rain during this month, averaging 65 mm (2.6 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Kapaa in September

September tends to be one of the perfect months in Kapaa, with 28°C (82°F) in the afternoon and 24°C (75°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.

Sunshine in Kapaa in September

Enjoy a sunny month with about 242 hours of sunshine, the clear skies make Kapaa even more beautiful.

Wind Speed in Kapaa 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 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.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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 Kapaa's climate page.

Kapaa Temperature in September

Min Temperature 24°C (75°F)  

Max Temperature 28°C (82°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 52%  

Precipitation 65 mm (2.6 in)  

Rainy days 16 days  

Humidity 74% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 242 hours *  

Percentage Sunshine 66% *  

* Data from: Lihue, the United States of America (8 KM, 5 Miles).

What to Wear in Kapaa in September

Warm but pleasant conditions in Kapaa in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Kapaa in September

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

Swimming

9/10

Cycling

8/10

Walking

8/10

Camping

8/10

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 Kapaa's climate page.

More climate data for Kapaa

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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