May weather forecastHana, HI

May

Weather in May

May brings noticeable transformations to Hana's climatic temperament. Moisture levels in the air still tread the 77% margin, an attribute that stays consistent throughout the year. Sea temperatures continue on their upward journey, while daylight stretches further, paving the path for extended outdoor excursions. However, the crown jewel of May is the sunshine duration, totaling 10.8 sunshine hours daily - the highest figure throughout the year.

Temperature

In May, the average high-temperature registers at a still warm 75.4°F (24.1°C), nearly identical to April's 74.3°F (23.5°C). Nighttime temperatures record an average of 72.7°F (22.6°C) throughout May.

Humidity

In Hana, the average relative humidity in May is 77%.

Rainfall

In May, the rain falls for 12.3 days. Throughout May, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 136.7 rainfall days, and 13.94" (354mm) of precipitation is accumulated.

Snowfall

January through August, October through December are months without snowfall in Hana.

Ocean temperature

In Hana, the average seawater temperature in May is 76.8°F (24.9°C).
Note: If someone is sensitive to cold, the enjoyment of swimming in 76.8°F (24.9°C) water hinges on factors like sunshine, wind, and the current air temperature. (For context: Olympic swimming competitions are held in water temperatures of 77°F (25°C) to 82.4°F (28°C).)

Daylight

In May, the average length of the day is 13h and 8min.
On the first day of the month, sunrise is at 5:53 am and sunset at 6:48 pm. On the last day of May, in Hana, Hawaii, sunrise is at 5:42 am and sunset at 7:01 pm HST.

Sunshine

In May, the average sunshine is 10.8h.

UV index

The months with the lowest UV index in Hana are January through August, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Warning! The reflection of sand and water increases the UV dose.

Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Hana, in May, the average high-temperature is 75.4°F (24.1°C), and the average low-temperature is 72.7°F (22.6°C).

The average relative humidity in May is 77%.

In Hana, in May, during 12.3 rainfall days, 0.94" (24mm) of precipitation is typically accumulated.

January through August, October through December are months without snowfall in Hana.

In Hana, in May, the average water temperature is 76.8°F (24.9°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.8°F (24.9°C) water.

In May, the average day length in Hana, Hawaii, is 13h and 8min.

On the first day of May, sunrise is at 5:53 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 7:01 pm HST.

In Hana, the average sunshine duration in May is 10.8h.

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

In Hana, Hawaii, the average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

74.3°F

75.4°F

76.8°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.7mph

12.9mph

14.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

11.7

12.3

8.8

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

12.4

13.4

14.9

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Hana, HI

Average high temperature in May: 75.4°F

The warmest month (with the highest average high temperature) is September (79°F).
The month with the lowest average high temperature is March (72.9°F).

Average low temperature in May: 72.7°F

The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is March (69.8°F).

Average pressure in May
Hana, HI

Average pressure in May: 30.04"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).

Average wind speed in May
Hana, HI

Average wind speed in May: 12.6mph

The windiest month (with the highest average wind speed) is June (14.4mph).
The calmest month (with the lowest average wind speed) is January (10.9mph).

Average humidity in May
Hana, HI

Average humidity in May: 77%

The months with the highest relative humidity are July and August (78%).
The months with the lowest relative humidity are January and February (76%).

Average rainfall in May
Hana, HI

Average rainfall in May: 0.94"

The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is September (0.43").

Average rainfall days in May
Hana, HI

Average rainfall days in May: 12.3 days

The month with the highest number of rainy days is March (14.1 days).
The month with the least rainy days is September (8.1 days).

Average snowfall days in May
Hana, HI

Average snowfall days in May: 0 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).

Average sea temperature in May
Hana, HI

Average sea temperature in May: 76.9°F

The best month for swimming (with the highest average sea temperature) is September (79.3°F).
The coldest month (with the lowest average sea temperature) is March (75.5°F).

Average daylight in May /
Average sunshine in May
Hana, HI

Average daylight in May: 13h and 6min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

Average sunshine in May: 10h and 48min

The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days in May
Hana, HI

Average sunshine days in May: 13.4 days

The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is November (11.2 days).

Average UV index in May
Hana, 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).

Average cloud cover in May
Hana, HI

Average cloud cover in May: 28

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

Average visibility in May
Hana, 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).