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
Ewa Beach's temperatures tend to hit their maximum during August and September, with an average high-temperature of 81.5°F (27.5°C).Heat index
The heat index in September is appraised at a tropical 86°F (30°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Be aware that heat index ratings are designed for shaded locations and minor breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
January, April through June, August through November, with an average relative humidity of 74%, are the least humid months.Rainfall
In Ewa Beach, Hawaii, in September, it is raining for 13.3 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, in Ewa Beach, Hawaii, there are 172.2 rainfall days, and 12.72" (323mm) of precipitation is accumulated.Ocean temperature
With an average ocean temperature of 80.6°F (27°C), September is the month with the warmest seawater.Note: Water activities including swimming and diving are pleasurable in temperatures between 77°F (25°C) and 84.2°F (29°C), ensuring comfort and enjoyment for extended time frames.
Daylight
The average length of the day in September in Ewa Beach is 12h and 15min.On the first day of the month, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of September, in Ewa Beach, sunrise is at 6:23 am and sunset at 6:20 pm HST.
Sunshine
The average sunshine in September is 9.3h.UV index
June through September, with an average maximum UV index of 7, are months with the highest UV index in Ewa Beach. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 7 transforms into the following advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Warning! The Sun's UV rays intensify with reflections from sand and water.
Frequently asked questions
What part of the year is the hottest in Ewa Beach?
What is the usual temperature for Ewa Beach in September?
What are the least humid months in Ewa Beach?
What is the average humidity in September in Ewa Beach?
How much does it rain in Ewa Beach in September?
What is the month with the warmest ocean in Ewa Beach?
What is the ocean temperature in September in Ewa Beach?
How many hours of daylight does Ewa Beach have in September?
When is the sunrise / sunset in September in Ewa Beach?
How many hours of sunshine does Ewa Beach have in September?
What is the month with the highest UV index in Ewa Beach?
What is the UV index intensity in September in Ewa Beach?
Average temperature in September
Ewa Beach, HI
- Average high temperature in September: 81.5°F
The warmest months (with the highest average high temperature) are August and September (81.5°F).
The month with the lowest average high temperature is February (74.8°F).
- Average low temperature in September: 76.3°F
The months with the highest average low temperature are August and September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.4°F).
Average pressure in September
Ewa Beach, 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
Ewa Beach, HI
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is July (11.9mph).
The calmest months (with the lowest average wind speed) are January and October (9.1mph).
Average humidity in September
Ewa Beach, HI
- Average humidity in September: 74%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).
Average rainfall in September
Ewa Beach, HI
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is March (1.77").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Ewa Beach, HI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).
Average sea temperature in September
Ewa Beach, HI
- Average sea temperature in September: 80.6°F
The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in September /
Average sunshine in September
Ewa Beach, 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 0min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in September
Ewa Beach, HI
- Average sunshine days in September: 12.2 days
The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).
Average UV index in September
Ewa Beach, HI
- Average UV index in September: 7
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 6).
Average cloud cover in September
Ewa Beach, HI
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Ewa Beach, 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).
Ewa Beach, Hawaii, USA
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