September weather forecast and climate
Puako, HI

Weather in September

The first month of the autumn, September, is still a warm month in Puako, Hawaii, with average temperature fluctuating between 74.8°F (23.8°C) and 78.3°F (25.7°C).

Temperature

In Puako, the average high-temperature is essentially the same as in August - a still warm 78.3°F (25.7°C). The average low-temperature, in Puako, is 74.8°F (23.8°C).

Humidity

The average relative humidity in Puako is 76%.

Rainfall

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

Daylight

In September, the average length of the day in Puako is 12.2h.

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 Puako. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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 average humidity in September in Puako?

The average relative humidity in September is 76%.

How many days does it rain in September in Puako?

In Puako, in September, during 13.4 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

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

The average length of the day in September in Puako, Hawaii, is 12.2h.

How long on average sun shines in September in Puako?

In September, the average sunshine in Puako is 9.5h.

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

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

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

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

What is the UV index reading in September in Puako?

In September, the average daily maximum UV index in Puako is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Puako, HI

Average temperature in September - Puako, 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

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
Puako, HI

Average pressure in September - Puako, HI
  • Average pressure in September: 29.96"

The month with the highest atmospheric pressure is April (30.04").
Months with the lowest atmospheric pressure are September and October (29.96").

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Average wind speed in September
Puako, HI

Average wind speed in September - Puako, 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
Puako, HI

Average humidity in September - Puako, HI
  • Average humidity in September: 76%

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
Puako, HI

Average rainfall in September - Puako, 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
Puako, HI

Average rainfall days in September - Puako, 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
Puako, HI

Average daylight in September / Average sunshine in September - Puako, HI
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13.3h).
The month with the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is June (Average sunshine: 11.4h).
The month with the least sunshine is December (Average sunshine: 7.4h).

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Average sunshine days in September
Puako, HI

Average sunshine days in September - Puako, 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
Puako, HI

Average UV index in September - Puako, HI
  • Average UV index in September: 6

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
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
Puako, HI

Average cloud cover in September - Puako, HI
  • Average cloud cover in September: 18

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
Puako, HI

Average visibility in September - Puako, HI
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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