September weather forecast
Puunene, HI

Weather in September

September, the first month of the autumn in Puunene, is still a warm month, with an average temperature fluctuating between 75.9°F (24.4°C) and 79.5°F (26.4°C).

Temperature

The warmest month is September, with an average high-temperature of 79.5°F (26.4°C) and an average low-temperature of 75.9°F (24.4°C).

Humidity

The average relative humidity in September is 76%.

Rainfall

In September, in Puunene, the rain falls for 7.7 days. Throughout September, 0.39" (10mm) of precipitation is accumulated. Throughout the year, in Puunene, there are 129.8 rainfall days, and 9.37" (238mm) of precipitation is accumulated.

Snowfall

September is the only month when snow falls. The month with the most snowfall days in Puunene is September, when snow falls for 0.1 days.

Daylight

The average length of the day in September in Puunene is 12h and 15min.
On the first day of September, 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

The average sunshine in September is 9.6h.

UV index

With an average maximum UV index of 7, September is the month with the highest UV index in Puunene, Hawaii. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the warmest month in Puunene?

The warmest month in Puunene is September, with an average high-temperature of 79.5°F (26.4°C) and an average low-temperature of 75.9°F (24.4°C).

What is the average humidity in September in Puunene?

In September, the average relative humidity is 76%.

How many days does it rain in September in Puunene?

In Puunene, in September, during 7.7 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

When does it snow the most in Puunene?

The month with the most snowfall days in Puunene, Hawaii, is September, when snow falls for 0.1 days.

When does it start snowing in Puunene?

September is the first month it typically snows in Puunene, Hawaii. Throughout September, there are 0.1 snowfall days.

How many hours of daylight does Puunene have in September?

The average day length in September in Puunene, Hawaii, is 12h and 15min.

When is the sunrise / sunset in September in Puunene?

In September, on the first day of the month, sunrise is at 6:09 am and sunset at 6:41 pm. On the last day of the month, in Puunene, sunrise is at 6:16 am and sunset at 6:14 pm HST.

How long on average sun shines in September in Puunene?

In Puunene, Hawaii, the average sunshine duration in September is 9.6h.

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

September is the month with the highest UV index in Puunene, Hawaii, with an average maximum UV index of 7.

What is the UV index reading in September in Puunene?

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

Average temperature in September
Puunene, HI

Average temperature in September - Puunene, HI
  • Average high temperature in September: 79.5°F

The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is March (73.8°F).

  • Average low temperature in September: 75.9°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is March (70.2°F).

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Average pressure in September
Puunene, HI

Average pressure in September - Puunene, HI
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in September
Puunene, HI

Average wind speed in September - Puunene, HI
  • Average wind speed in September: 12.2mph

The windiest month (with the highest average wind speed) is June (14mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).

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Average humidity in September
Puunene, HI

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

The months with the highest relative humidity are July and August (77%).
The months with the lowest relative humidity are January, February and March (75%).

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Average rainfall in September
Puunene, HI

Average rainfall in September - Puunene, HI
  • Average rainfall in September: 0.39"

The wettest month (with the highest rainfall) is February (1.26").
The driest month (with the least rainfall) is June (0.28").

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Average rainfall days in September
Puunene, HI

Average rainfall days in September - Puunene, HI
  • Average rainfall days in September: 7.7 days

The month with the highest number of rainy days is March (15.6 days).
The months with the least rainy days are June, August and September (7.7 days).

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Average snowfall days in September
Puunene, HI

Average snowfall days in September - Puunene, HI
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).

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

Average daylight in September / Average sunshine in September - Puunene, HI
  • Average daylight in September: 12h and 15min

The month with the longest days is June (Average daylight: 13h and 23min).
The month with the shortest days is December (Average daylight: 10h and 53min).

  • Average sunshine in September: 9h and 36min

The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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Average sunshine days in September
Puunene, HI

Average sunshine days in September - Puunene, HI
  • Average sunshine days in September: 16 days

The month with the most sunshine days is July (17.1 days).
The month with the least sunshine days is November (8.9 days).

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Average UV index in September
Puunene, HI

Average UV index in September - Puunene, HI
  • Average UV index in September: 7

The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).

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Average cloud cover in September
Puunene, HI

Average cloud cover in September - Puunene, HI
  • Average cloud cover in September: 23

The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is September (Cloud cover 23).

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Average visibility in September
Puunene, HI

Average visibility in September - Puunene, 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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