May weather forecast
Hanalei, HI

The vast Taro farm fields in the valley of Hanalei, Hawaii, with beautiful cloudy skies and mountains
The vast Taro farm fields in the valley of Hanalei, Hawaii, with beautiful cloudy skies and mountains

Weather in May

The last month of the spring, May, is also a moderately hot month in Hanalei, Hawaii, with an average temperature ranging between min 72.1°F (22.3°C) and max 76.8°F (24.9°C).

Temperature

In May, the average high-temperature is relatively the same as in April - a still moderately hot 76.8°F (24.9°C). The average low-temperature, is 72.1°F (22.3°C).

Humidity

In Hanalei, the average relative humidity in May is 76%.

Rainfall

In Hanalei, during 18.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Hanalei, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.

Ocean temperature

In Hanalei, the average seawater temperature in May is 77°F (25°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Hanalei, the average length of the day in May is 13h and 13min.
On the first day of the month, sunrise is at 6:05 am and sunset at 7:04 pm. On the last day of May, in Hanalei, sunrise is at 5:53 am and sunset at 7:17 pm HST.

Sunshine

In May, the average sunshine is 9.3h.

UV index

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Hanalei. 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 May transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in May in Hanalei?

The average high-temperature, in May, in Hanalei, is 76.8°F (24.9°C), while the average low-temperature is 72.1°F (22.3°C).

What is the average humidity in May in Hanalei?

The average relative humidity in May is 76%.

How many days does it rain in May in Hanalei?

In Hanalei, in May, during 18.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

What is the water temperature in May in Hanalei?

In Hanalei, Hawaii, in May, the average water temperature is 77°F (25°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the average length of the day in May in Hanalei?

In Hanalei, the average day length in May is 13h and 13min.

What time are sunrise and sunset in May in Hanalei?

In May, on the first day of the month, sunrise is at 6:05 am and sunset at 7:04 pm. On the last day of the month, in Hanalei, Hawaii, sunrise is at 5:53 am and sunset at 7:17 pm HST.

How long on average sun shines in May in Hanalei?

In May, the average sunshine duration in Hanalei, Hawaii, is 9.3h.

When is the lowest UV index in Hanalei?

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

What is the UV index intensity in May in Hanalei?

In Hanalei, Hawaii, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Hanalei, HI

Average temperature in May - Hanalei, HI
  • Average high temperature in May: 76.8°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 May: 72.1°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 May
Hanalei, HI

Average pressure in May - Hanalei, HI
  • Average pressure in May: 30.05"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 May
Hanalei, HI

Average wind speed in May - Hanalei, HI
  • Average wind speed in May: 10.5mph

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 May
Hanalei, HI

Average humidity in May - Hanalei, HI
  • Average humidity in May: 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 May
Hanalei, HI

Average rainfall in May - Hanalei, HI
  • Average rainfall in May: 1.57"

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 May
Hanalei, HI

Average rainfall days in May - Hanalei, HI
  • Average rainfall days in May: 18.5 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 May
Hanalei, HI

Average sea temperature in May - Hanalei, HI
  • Average sea temperature in May: 77°F

The best months for swimming (with the highest average sea temperature) are 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 May /
Average sunshine in May
Hanalei, HI

Average daylight in May / Average sunshine in May - Hanalei, HI
  • Average daylight in May: 13h and 13min

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 48min).

  • Average sunshine in May: 9h and 18min

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 May
Hanalei, HI

Average sunshine days in May - Hanalei, HI
  • Average sunshine days in May: 6.7 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 May
Hanalei, HI

Average UV index in May - Hanalei, HI
  • Average UV index in May: 6

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 May
Hanalei, HI

Average cloud cover in May - Hanalei, HI
  • Average cloud cover in May: 41

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 May
Hanalei, HI

Average visibility in May - Hanalei, HI
  • Average visibility in May: 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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