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
September, recording an average high temperature of 79.9°F (26.6°C) and a low temperature of 76.1°F (24.5°C), is Kahului's warmest month.Humidity
The average relative humidity in September is 75%.Rainfall
In Kahului, during September, the rain falls for 8.1 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, in Kahului, there are 103.4 rainfall days, and 6.57" (167mm) of precipitation is accumulated.Ocean temperature
September is the month with the warmest seawater, with an average ocean temperature of 80.1°F (26.7°C).Note: For swimming, diving, and similar activities, the water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered delightful, allowing for extended periods of enjoyment without discomfort.
Daylight
In September, the average length of the day in Kahului is 12h and 15min.On the first day of September in Kahului, sunrise is at 6:09 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 6:14 pm HST.
Sunshine
In Kahului, Hawaii, the average sunshine in September is 9.6h.UV index
July through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 7 during September leads to these advisories:
Fend off overexposure. Sun protection 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. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Warning! The reflection of sand and water increases the UV dose.
Frequently asked questions
What is the hottest time of year in Kahului?
What is the temperature in September in Kahului?
What is the average humidity in September in Kahului?
How much does it rain in Kahului in September?
What is the month with the warmest ocean in Kahului?
What is the ocean temperature in September in Kahului?
What is the average length of the day in September in Kahului?
When are sunrise and sunset in September in Kahului?
How many hours of sunshine does Kahului have in September?
When is the highest UV index in Kahului?
What is the UV index reading in September in Kahului?
Average temperature in September
Kahului, HI
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in September: 76.1°F
The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).
Average pressure in September
Kahului, HI
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in September
Kahului, HI
- Average wind speed in September: 11.9mph
The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).
Average humidity in September
Kahului, HI
- Average humidity in September: 75%
The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in September
Kahului, HI
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in September
Kahului, HI
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).
Average sea temperature in September
Kahului, 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 (75.6°F).
Average daylight in September /
Average sunshine in September
Kahului, 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 4min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Kahului, HI
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).
Average UV index in September
Kahului, HI
- Average UV index in September: 7
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in September
Kahului, HI
- Average cloud cover in September: 21
The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).
Average visibility in September
Kahului, 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).
Kahului, Hawaii, USA
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