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
In Kaaawa, Hawaii, August and September are characterised by the peak of temperatures, recording an average high of 81°F (27.2°C).Heat index
The heat index value for September is estimated at a tropical 86°F (30°C). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.For clarity, heat index numbers account for light winds and areas under shade. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
January, May, June, September and November, with an average relative humidity of 75%, are the least humid months in Kaaawa.Rainfall
In September, in Kaaawa, the rain falls for 14.5 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. In Kaaawa, during the entire year, the rain falls for 187.1 days and collects up to 15.83" (402mm) of precipitation.Ocean temperature
With an average ocean temperature of 80.1°F (26.7°C), September is the month with the warmest seawater.Note: For any water activity, surface water temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed perfect and extremely pleasing for enduring enjoyment.
Daylight
In Kaaawa, the average length of the day in September is 12h and 16min.On the first day of September, sunrise is at 6:14 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 6:19 pm HST.
Sunshine
In September, the average sunshine is 9h.UV index
July through September, with an average maximum UV index of 7, are months with the highest UV index in Kaaawa. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 7 during September translates into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Frequently asked questions
What are the warmest months in Kaaawa?
What are September temperatures in Kaaawa?
What are the least humid months in Kaaawa?
What is the average humidity in September in Kaaawa?
How many days does it rain in September in Kaaawa?
What month is the ocean warmest in Kaaawa?
What is the ocean temperature in September in Kaaawa?
How many hours of daylight does Kaaawa have in September?
What time are sunrise and sunset in September in Kaaawa?
How long on average sun shines in September in Kaaawa?
What are the months with the highest UV index in Kaaawa?
How high is the UV index in September in Kaaawa?
Average temperature in September
Kaaawa, HI
- Average high temperature in September: 81°F
The warmest months (with the highest average high temperature) are August and September (81°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in September: 76.3°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is February (69.6°F).
Average pressure in September
Kaaawa, HI
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Kaaawa, HI
- Average wind speed in September: 11.4mph
The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is January (10.3mph).
Average humidity in September
Kaaawa, HI
- Average humidity in September: 75%
The months with the highest relative humidity are February, March, April, July, August, October and December (76%).
The months with the lowest relative humidity are January, May, June, September and November (75%).
Average rainfall in September
Kaaawa, HI
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in September
Kaaawa, HI
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is June (13.5 days).
Average sea temperature in September
Kaaawa, HI
- Average sea temperature in September: 80.1°F
The best month for swimming (with the highest average sea temperature) is September (80.1°F).
The coldest month (with the lowest average sea temperature) is March (75°F).
Average daylight in September /
Average sunshine in September
Kaaawa, 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: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Kaaawa, HI
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in September
Kaaawa, HI
- Average UV index in September: 7
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in September
Kaaawa, HI
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Kaaawa, 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).
Kaaawa, Hawaii, USA
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