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
Temperatures reach their maximum during August and September, recording an average high-temperature of 80.2°F (26.8°C).Humidity
The average relative humidity in September in Kaunakakai is 75%.Rainfall
In Kaunakakai, Hawaii, in September, it is raining for 10.1 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 126.4 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Ocean temperature
The month with the warmest seawater in Kaunakakai, Hawaii, is September, with an average ocean temperature of 80.2°F (26.8°C).Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.
Daylight
In Kaunakakai, the average length of the day in September is 12h and 15min.On the first day of the month, sunrise is at 6:11 am and sunset at 6:43 pm. On the last day of September, in Kaunakakai, sunrise is at 6:19 am and sunset at 6:16 pm HST.
Sunshine
The average sunshine in September in Kaunakakai is 9.5h.UV index
June through October, with an average maximum UV index of 7, are months with the highest UV index in Kaunakakai. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 7 in September translates into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest in Kaunakakai?
What is the usual temperature for Kaunakakai in September?
What is the average humidity in September in Kaunakakai?
How many days does it rain in September in Kaunakakai?
What is the month with the warmest ocean in Kaunakakai?
What is the water temperature in September in Kaunakakai?
How many hours of daylight does Kaunakakai have in September?
What time are sunrise and sunset in September in Kaunakakai?
How many hours of sunshine does Kaunakakai have in September?
What are the months with the highest UV index in Kaunakakai?
What is the UV index intensity in September in Kaunakakai?
Average temperature in September
Kaunakakai, HI
- Average high temperature in September: 80.2°F
The warmest months (with the highest average high temperature) are August and September (80.2°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in September: 77.2°F
The months with the highest average low temperature are September and October (77.2°F).
The coldest month (with the lowest average low temperature) is March (71.2°F).
Average pressure in September
Kaunakakai, HI
- Average pressure in September: 29.97"Hg
The months with the highest atmospheric pressure are March and April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Kaunakakai, 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 (10.8mph).
Average humidity in September
Kaunakakai, HI
- Average humidity in September: 75%
The months with the highest relative humidity are April, May, June, July and August (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in September
Kaunakakai, HI
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is March (1.3").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Kaunakakai, HI
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is March (13.2 days).
The month with the least rainy days is July (8.5 days).
Average sea temperature in September
Kaunakakai, HI
- Average sea temperature in September: 80.2°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (75.6°F).
Average daylight in September /
Average sunshine in September
Kaunakakai, 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 3min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Kaunakakai, HI
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is July (16.1 days).
The month with the least sunshine days is November (10.8 days).
Average UV index in September
Kaunakakai, HI
- Average UV index in September: 7
The months with the highest UV index are June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 6).
Average cloud cover in September
Kaunakakai, HI
- Average cloud cover in September: 23
The months with the most cloud cover are February and March (Cloud cover 30).
The month with the least cloud cover is September (Cloud cover 23).
Average visibility in September
Kaunakakai, 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).
Kaunakakai, Hawaii, USA
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