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
In Kawela Bay, September records the highest average temperatures, peaking at 81.3°F (27.4°C) and reaching a low of 76.1°F (24.5°C).Heat index
Throughout September, the heat index is calculated to be a tropical 86°F (30°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
The months with the lowest humidity are January, April, May, September and November, with an average relative humidity of 75%.Rainfall
In Kawela Bay, in September, during 16.9 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Kawela Bay, during the entire year, the rain falls for 215.6 days and collects up to 16.38" (416mm) of precipitation.Daylight
In Kawela Bay, the average length of the day in September is 12h and 16min.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 Kawela Bay, sunrise is at 6:23 am and sunset at 6:20 pm HST.
Sunshine
The average sunshine in September in Kawela Bay, Hawaii, is 8.6h.UV index
The months with the highest UV index are July and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 7 suggests this advice:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months in Kawela Bay?
What are September temperatures in Kawela Bay?
What is the least humid month in Kawela Bay?
What is the average humidity in September in Kawela Bay?
How many days does it rain in September in Kawela Bay?
What is the average length of the day in September in Kawela Bay?
When are sunrise and sunset in September in Kawela Bay?
How long on average sun shines in September in Kawela Bay?
What is the month with the highest UV index in Kawela Bay?
How high is the UV index in September in Kawela Bay?
Average temperature in September
Kawela Bay, HI
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is September (81.3°F).
The month with the lowest average high temperature is February (74.1°F).
- Average low temperature in September: 76.1°F
The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in September
Kawela Bay, HI
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The month with the lowest atmospheric pressure is October (29.97"Hg).
Average wind speed in September
Kawela Bay, HI
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is July (13.4mph).
The calmest month (with the lowest average wind speed) is January (10.2mph).
Average humidity in September
Kawela Bay, HI
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January, April, May, September and November (75%).
Average rainfall in September
Kawela Bay, HI
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is March (2.09").
The driest month (with the least rainfall) is July (0.75").
Average rainfall days in September
Kawela Bay, HI
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is January (15.6 days).
Average daylight in September /
Average sunshine in September
Kawela Bay, 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 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Kawela Bay, HI
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is January (10.1 days).
The month with the least sunshine days is November (3.5 days).
Average UV index in September
Kawela Bay, HI
- Average UV index in September: 7
The months with the highest UV index are July and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, October, November and December (UV index 6).
Average cloud cover in September
Kawela Bay, HI
- Average cloud cover in September: 39
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 39).
Average visibility in September
Kawela Bay, 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).
Kawela Bay, Hawaii, USA
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