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
The warmest period tends to be September, when average temperatures fluctuate between a high of 79.7°F (26.5°C) and a low of 75.9°F (24.4°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Hanamaulu, Hawaii, in September, during 18.7 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Ocean temperature
The month with the warmest seawater is September, with an average ocean temperature of 80.4°F (26.9°C).Note: Swimming, diving, and other activities in water temperatures between 77°F (25°C) and 84.2°F (29°C) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.
Daylight
In September, the average length of the day in Hanamaulu is 12h and 16min.On the first day of the month, sunrise is at 6:20 am and sunset at 6:53 pm. On the last day of September, sunrise is at 6:28 am and sunset at 6:25 pm HST.
Sunshine
The average sunshine in September is 8.7h.UV index
September is the month with the highest UV index in Hanamaulu, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 7 in September interprets into the following advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be attentive! The UV exposure is heightened with reflections from sand and water.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Hanamaulu?
What is the temperature in September in Hanamaulu?
What is the average humidity in September in Hanamaulu?
How many days does it rain in September in Hanamaulu?
What is the month with the warmest ocean in Hanamaulu?
What is the water temperature in September in Hanamaulu?
What is the average length of the day in September in Hanamaulu?
When is the sunrise / sunset in September in Hanamaulu?
How many hours of sunshine does Hanamaulu have in September?
When is the highest UV index in Hanamaulu?
What is the UV index intensity in September in Hanamaulu?
Average temperature in September
Hanamaulu, HI
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).
- Average low temperature in September: 75.9°F
The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in September
Hanamaulu, HI
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in September
Hanamaulu, HI
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).
Average humidity in September
Hanamaulu, HI
- Average humidity in September: 76%
The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).
Average rainfall in September
Hanamaulu, HI
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").
Average rainfall days in September
Hanamaulu, HI
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature in September
Hanamaulu, HI
- Average sea temperature in September: 80.4°F
The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.3°F).
Average daylight in September /
Average sunshine in September
Hanamaulu, HI
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in September
Hanamaulu, HI
- Average sunshine days in September: 5.3 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).
Average UV index in September
Hanamaulu, HI
- Average UV index in September: 7
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in September
Hanamaulu, HI
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).
Average visibility in September
Hanamaulu, 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).
Hanamaulu, Hawaii, USA
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