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
Keauhou, Hawaii, registers an average high-temperature of a still agreeable 73°F (22.8°C) with the arrival of September, showing minor deviation from the preceding month. Keauhou consistently logs a low temperature averaging a still pleasant 69.8°F (21°C) during September, a modest drop from daytime temperatures.Humidity
June through September, with an average relative humidity of 81%, are the most humid months in Keauhou.Rainfall
September is the month with the most rainfall in Keauhou. Rain falls for 21.5 days and accumulates 1.81" (46mm) of precipitation.Ocean temperature
The month with the warmest seawater is September, with an average ocean temperature of 80.1°F (26.7°C).Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 77°F (25°C) to 84.2°F (29°C), without any unpleasant sensations for prolonged durations.
Daylight
The average length of the day in September is 12h and 14min.On the first day of the month, sunrise is at 6:08 am and sunset at 6:38 pm. On the last day of September, sunrise is at 6:14 am and sunset at 6:12 pm HST.
Sunshine
In September, the average sunshine in Keauhou is 8.7h.UV index
The months with the highest UV index are May through October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
Frequently asked questions
What is the temperature in September in Keauhou?
What are the most humid months in Keauhou?
What is the average humidity in September in Keauhou?
What is the rainiest month in Keauhou?
How much does it rain in Keauhou in September?
What month is the ocean warmest in Keauhou?
What is the water temperature in September in Keauhou?
What is the average length of the day in September in Keauhou?
When is the sunrise / sunset in September in Keauhou?
How long on average sun shines in September in Keauhou?
What are the months with the highest UV index in Keauhou?
What is the UV index intensity in September in Keauhou?
Average temperature in September
Keauhou, HI
- Average high temperature in September: 73°F
The warmest months (with the highest average high temperature) are August and October (73.2°F).
The month with the lowest average high temperature is February (68.9°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is October (70°F).
The coldest month (with the lowest average low temperature) is March (64.8°F).
Average pressure in September
Keauhou, HI
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is April (30.04"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).
Average wind speed in September
Keauhou, HI
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in September
Keauhou, HI
- Average humidity in September: 81%
The months with the highest relative humidity are June, July, August and September (81%).
The month with the lowest relative humidity is February (73%).
Average rainfall in September
Keauhou, HI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is September (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Keauhou, HI
- Average rainfall days in September: 21.5 days
The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is January (10.8 days).
Average sea temperature in September
Keauhou, HI
- Average sea temperature in September: 80°F
The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (76°F).
Average daylight in September /
Average sunshine in September
Keauhou, HI
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is May (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 7h and 18min).
Average sunshine days in September
Keauhou, HI
- Average sunshine days in September: 3.5 days
The month with the most sunshine days is January (12.7 days).
The month with the least sunshine days is May (3.2 days).
Average UV index in September
Keauhou, HI
- Average UV index in September: 6
The months with the highest UV index are May, June, July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 5).
Average cloud cover in September
Keauhou, HI
- Average cloud cover in September: 28
The month with the most cloud cover is June (Cloud cover 31).
The month with the least cloud cover is January (Cloud cover 15).
Average visibility in September
Keauhou, 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).
Keauhou, Hawaii, USA
Weather forecast for your location
2. Allow the app to use your location
