September weather forecast
Lihue, HI

Weather in September

The first month of the autumn, September, is still a warm month in Lihue, Hawaii, with an average temperature fluctuating between 79.7°F (26.5°C) and 75.9°F (24.4°C).

Temperature

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C), September is the warmest month.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Lihue, Hawaii, it is raining for 18.7 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Ocean temperature

August through October, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater.
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September in Lihue is 12h and 16min.
On the first day of the month, sunrise is at 6:20 am and sunset at 6:54 pm. On the last day of September, in Lihue, sunrise is at 6:28 am and sunset at 6:26 pm HST.

Sunshine

In Lihue, the average sunshine in September is 8.7h.

UV index

The month with the highest UV index is September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in September transform into the following instructions:
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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the warmest month in Lihue?

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C), September is the warmest month in Lihue.

What is the temperature in September in Lihue?

In Lihue, in September, the average high-temperature is 79.7°F (26.5°C), and the average low-temperature is 75.9°F (24.4°C).

What is the average humidity in September in Lihue?

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

How much does it rain in Lihue in September?

In September, in Lihue, the rain falls for 18.7 days. Throughout September, 1.54" (39mm) of precipitation is accumulated.

When is the ocean warmest in Lihue?

The months with the warmest seawater in Lihue, Hawaii, are August through October, with an average ocean temperature of 80.6°F (27°C).

What is the ocean temperature in September in Lihue?

In September, the average ocean temperature is 80.6°F (27°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

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

The average day length in September in Lihue is 12h and 16min.

When are sunrise and sunset in September in Lihue?

On the first day of September in Lihue, sunrise is at 6:20 am and sunset at 6:54 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 6:26 pm HST.

How many hours of sunshine does Lihue have in September?

In Lihue, Hawaii, the average sunshine duration in September is 8.7h.

When is the highest UV index in Lihue?

The month with the highest UV index is September, with an average maximum UV index of 7.

How high is the UV index in September in Lihue?

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

Average temperature in September
Lihue, HI

Average temperature in September - Lihue, HI
  • Average high temperature in September: 79.7°F

The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°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 February (68.5°F).

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Average pressure in September
Lihue, HI

Average pressure in September - Lihue, HI
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).

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Average wind speed in September
Lihue, HI

Average wind speed in September - Lihue, HI
  • Average wind speed in September: 11.1mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

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Average humidity in September
Lihue, HI

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

The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

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Average rainfall in September
Lihue, HI

Average rainfall in September - Lihue, HI
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

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Average rainfall days in September
Lihue, HI

Average rainfall days in September - Lihue, HI
  • Average rainfall days in September: 18.7 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

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Average sea temperature in September
Lihue, HI

Average sea temperature in September - Lihue, HI
  • Average sea temperature in September: 81°F

The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).

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

Average daylight in September / Average sunshine in September - Lihue, HI
  • Average daylight in September: 12h and 16min

The month with the longest days is June (Average daylight: 13h and 28min).
The month with the shortest days is December (Average daylight: 10h and 49min).

  • Average sunshine in September: 8h and 42min

The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).

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Average sunshine days in September
Lihue, HI

Average sunshine days in September - Lihue, HI
  • Average sunshine days in September: 5.3 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

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Average UV index in September
Lihue, HI

Average UV index in September - Lihue, 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
Lihue, HI

Average cloud cover in September - Lihue, HI
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).

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Average visibility in September
Lihue, HI

Average visibility in September - Lihue, 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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