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
September's arrival brings an average high-temperature of a still enjoyable 66.4°F (19.1°C), demonstrating subtle variation from the preceding month. Waiaka registers a gentle descent to an average nighttime low of 59°F (15°C) in September from its daytime highs.Humidity
The months with the highest humidity in Waiaka are September and October, with an average relative humidity of 84%.Rainfall
In September, the rain falls for 27.3 days. Throughout September, 3.31" (84mm) of precipitation is accumulated. Throughout the year, there are 280.8 rainfall days, and 33.9" (861mm) of precipitation is accumulated.Daylight
In Waiaka, the average length of the day in September is 12h and 14min.On the first day of September, sunrise is at 6:07 am and sunset at 6:37 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 6:11 pm HST.
Sunshine
In Waiaka, the average sunshine in September is 7.7h.UV index
May through October, with an average maximum UV index of 5, are months with the highest UV index in Waiaka, Hawaii. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Put precautions into practice - Guidance to elude sunburn is provided. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What are September temperatures in Waiaka?
What is the most humid month in Waiaka?
What is the average humidity in September in Waiaka?
How many days does it rain in September in Waiaka?
What is the average length of the day in September in Waiaka?
When are sunrise and sunset in September in Waiaka?
How many hours of sunshine does Waiaka have in September?
When is the highest UV index in Waiaka?
What is the UV index reading in September in Waiaka?
Average temperature in September
Waiaka, HI
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is August (67.5°F).
The month with the lowest average high temperature is March (61.9°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is September (59°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in September
Waiaka, 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
Waiaka, HI
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are July and August (5.5mph).
The calmest months (with the lowest average wind speed) are January, May and October (4.5mph).
Average humidity in September
Waiaka, HI
- Average humidity in September: 84%
The months with the highest relative humidity are September and October (84%).
The month with the lowest relative humidity is February (78%).
Average rainfall in September
Waiaka, HI
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is June (1.57").
Average rainfall days in September
Waiaka, HI
- Average rainfall days in September: 27.3 days
The month with the highest number of rainy days is September (27.3 days).
The month with the least rainy days is January (17.1 days).
Average daylight in September /
Average sunshine in September
Waiaka, 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: 10h and 54min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Waiaka, HI
- Average sunshine days in September: 0.8 days
The month with the most sunshine days is January (9.7 days).
The month with the least sunshine days is September (0.8 days).
Average UV index in September
Waiaka, HI
- Average UV index in September: 5
The months with the highest UV index are May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
Waiaka, HI
- Average cloud cover in September: 43
The months with the most cloud cover are April and September (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in September
Waiaka, 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).
Waiaka, Hawaii, USA
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