September weather forecast
Kalaoa, HI

Weather in September

September, the first month of the autumn in Kalaoa, is still a warm month, with temperature in the range of an average high of 78.3°F (25.7°C) and an average low of 74.8°F (23.8°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still moderately hot 78.3°F (25.7°C). The average low-temperature, in Kalaoa, is 74.8°F (23.8°C).

Humidity

The average relative humidity in September in Kalaoa is 76%.

Rainfall

In Kalaoa, during 13.4 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Kalaoa, during the entire year, the rain falls for 136 days and collects up to 8.5" (216mm) of precipitation.

Daylight

The average length of the day in September in Kalaoa is 12h and 14min.
On the first day of September in Kalaoa, sunrise is at 6:08 am and sunset at 6:39 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 6:13 pm HST.

Sunshine

In Kalaoa, 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 Kalaoa. The months with the lowest UV index in Kalaoa are January through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Kalaoa?

In September, in Kalaoa, Hawaii, the average high-temperature is 78.3°F (25.7°C), and the average low-temperature is 74.8°F (23.8°C).

What is the average humidity in September in Kalaoa?

In September, the average relative humidity in Kalaoa, Hawaii, is 76%.

How many days does it rain in September in Kalaoa?

In Kalaoa, in September, it is raining for 13.4 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the average length of the day in September in Kalaoa?

The average day length in September in Kalaoa is 12h and 14min.

What time are sunrise and sunset in September in Kalaoa?

In September, on the first day of the month, sunrise is at 6:08 am and sunset at 6:39 pm. On the last day of the month, in Kalaoa, Hawaii, sunrise is at 6:14 am and sunset at 6:13 pm HST.

How long on average sun shines in September in Kalaoa?

The average sunshine duration in September in Kalaoa is 9.5h.

What is the month with the highest UV index in Kalaoa?

The months with the highest UV index in Kalaoa are January through December, with an average maximum UV index of 6.

What are the months with the lowest UV index in Kalaoa?

The months with the lowest UV index in Kalaoa are January through December, with an average maximum UV index of 6.

What is the UV index intensity in September in Kalaoa?

In Kalaoa, Hawaii, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Kalaoa, HI

Average temperature in September - Kalaoa, 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).

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Average pressure in September
Kalaoa, HI

Average pressure in September - Kalaoa, 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).

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Average wind speed in September
Kalaoa, HI

Average wind speed in September - Kalaoa, 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).

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Average humidity in September
Kalaoa, HI

Average humidity in September - Kalaoa, 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%).

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Average rainfall in September
Kalaoa, HI

Average rainfall in September - Kalaoa, 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").

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Average rainfall days in September
Kalaoa, HI

Average rainfall days in September - Kalaoa, 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).

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Average daylight in September /
Average sunshine in September
Kalaoa, HI

Average daylight in September / Average sunshine in September - Kalaoa, HI
  • Average daylight in September: 12h and 14min

The month with the longest days is June (Average daylight: 13h and 19min).
The month with the shortest days is December (Average daylight: 10h and 58min).

  • Average sunshine in September: 9h and 30min

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).

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Average sunshine days in September
Kalaoa, HI

Average sunshine days in September - Kalaoa, 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).

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Average UV index in September
Kalaoa, HI

Average UV index in September - Kalaoa, 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).

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Average cloud cover in September
Kalaoa, HI

Average cloud cover in September - Kalaoa, 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).

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Average visibility in September
Kalaoa, HI

Average visibility in September - Kalaoa, 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).

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