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
The shift from August to September is characterized by an average high-temperature of a still moderately hot 78.3°F (25.7°C), not significantly different from the 78.4°F (25.8°C) of August. Night temperatures during September in Mahaiula, Hawaii, experience a slight downturn, averaging a still moderately hot 74.8°F (23.8°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Mahaiula, Hawaii, during September, the rain falls for 13.4 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, in Mahaiula, there are 136 rainfall days, and 8.5" (216mm) of precipitation is accumulated.Daylight
In Mahaiula, 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, in Mahaiula, sunrise is at 6:14 am and sunset at 6:12 pm HST.
Sunshine
The average sunshine in September is 9.5h.UV index
January through December, with an average maximum UV index of 6, are months with the highest UV index in Mahaiula. The months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 6 in September translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
What is the usual temperature for Mahaiula in September?
What is the average humidity in September in Mahaiula?
How much does it rain in Mahaiula in September?
What is the average length of the day in September in Mahaiula?
What time are sunrise and sunset in September in Mahaiula?
How long on average sun shines in September in Mahaiula?
What is the month with the highest UV index in Mahaiula?
What are the months with the lowest UV index in Mahaiula?
What is the UV index reading in September in Mahaiula?
Average temperature in September
Mahaiula, HI
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is February (73.2°F).
- Average low temperature in September: 74.8°F
The months with the highest average low temperature are August, September and October (74.8°F).
The coldest month (with the lowest average low temperature) is March (69.4°F).
Average pressure in September
Mahaiula, 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
Mahaiula, HI
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (6.2mph).
The calmest month (with the lowest average wind speed) is July (5mph).
Average humidity in September
Mahaiula, HI
- Average humidity in September: 76%
The months with the highest relative humidity are June, July and August (77%).
The month with the lowest relative humidity is February (71%).
Average rainfall in September
Mahaiula, HI
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Mahaiula, HI
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is February (8.1 days).
Average daylight in September /
Average sunshine in September
Mahaiula, 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: 9h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).
Average sunshine days in September
Mahaiula, HI
- Average sunshine days in September: 8.3 days
The month with the most sunshine days is January (14.5 days).
The month with the least sunshine days is October (6.8 days).
Average UV index in September
Mahaiula, HI
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Mahaiula, HI
- Average cloud cover in September: 18
The months with the most cloud cover are April, May and June (Cloud cover 21).
The month with the least cloud cover is January (Cloud cover 12).
Average visibility in September
Mahaiula, 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).
Mahaiula, Hawaii, USA
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