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 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's peak temperatures tend to occur in August and September, with an average high-temperature of 81.5°F (27.5°C).Heat index
In September, the heat index is appraised at a tropical 86°F (30°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.Always consider that heat index estimations are for light winds and places in the shade. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a numerical representation of warmth when taking temperature and moisture levels into account. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
The months with the lowest humidity in Ewa, Hawaii, are January, April through June, August through November, with an average relative humidity of 74%.Rainfall
In Ewa, in September, it is raining for 13.3 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, there are 172.2 rainfall days, and 12.72" (323mm) of precipitation is accumulated.Daylight
The average length of the day in September in Ewa is 12h and 15min.On the first day of September in Ewa, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 6:20 pm HST.
Sunshine
In September, the average sunshine in Ewa is 9.3h.UV index
June through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 7 during September translates into the following guidance:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What are the warmest months in Ewa?
What is the temperature in September in Ewa?
What are the least humid months in Ewa?
What is the average humidity in September in Ewa?
How much does it rain in Ewa in September?
What is the average length of the day in September in Ewa?
What time are sunrise and sunset in September in Ewa?
How many hours of sunshine does Ewa have in September?
What are the months with the highest UV index in Ewa?
What is the UV index intensity in September in Ewa?
Average temperature in September
Ewa, 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, 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, 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, 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, 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, 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 daylight in September /
Average sunshine in September
Ewa, 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, 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, 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, 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, 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, Hawaii, USA
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