Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September is the month when Kapalua, Hawaii, experiences its warmest temperatures, averaging a high of 79.7°F (26.5°C) and a low of 76.3°F (24.6°C).Humidity
January through March, September and November, with an average relative humidity of 75%, are the least humid months in Kapalua.Rainfall
In Kapalua, in September, it is raining for 8.5 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 112.6 rainfall days, and 7.91" (201mm) of precipitation is accumulated.Ocean temperature
September and October, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater.Note: For activities such as swimming and diving, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.
Daylight
The average length of the day in September is 12h and 15min.On the first day of the month, sunrise is at 6:10 am and sunset at 6:42 pm. On the last day of September, sunrise is at 6:17 am and sunset at 6:14 pm HST.
Sunshine
The average sunshine in September is 9.4h.UV index
July through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 7 in September transforms into this advice:
Shield from overexposure. Defense against sun-related harm is required. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
What are September temperatures?
What are the least humid months?
What is the average humidity in September?
How many days does it rain in September?
When is the ocean warmest?
What is the ocean temperature in September?
How many hours of daylight does Kapalua have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Kapalua have in September?
What are the months with the highest UV index?
How high is the UV index in September?
Average temperature in September
Kapalua, HI
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in September: 76.3°F
The months with the highest average low temperature are August and October (76.5°F).
The coldest month (with the lowest average low temperature) is March (70.7°F).
Average pressure in September
Kapalua, HI
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Kapalua, HI
- Average wind speed in September: 11.8mph
The windiest month (with the highest average wind speed) is July (13.9mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).
Average humidity in September
Kapalua, HI
- Average humidity in September: 75%
The month with the highest relative humidity is July (77%).
The months with the lowest relative humidity are January, February, March, September and November (75%).
Average rainfall in September
Kapalua, HI
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is March (1.1").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Kapalua, HI
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is November (7.7 days).
Average sea temperature in September
Kapalua, HI
- Average sea temperature in September: 81°F
The best months for swimming (with the highest average sea temperature) are September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).
Average daylight in September /
Average sunshine in September
Kapalua, HI
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Kapalua, HI
- Average sunshine days in September: 18.3 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is March (12.6 days).
Average UV index in September
Kapalua, HI
- Average UV index in September: 7
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in September
Kapalua, HI
- Average cloud cover in September: 25
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in September
Kapalua, HI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Kapalua, Hawaii, USA
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