May weather forecast and climate
Hana, HI

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Weather in May

May, the last month of the spring, in Hana, is also a moderately hot month, with average temperature fluctuating between 72.7°F (22.6°C) and 75.4°F (24.1°C).

Temperature

In May, the average high-temperature is practically the same as in April - a still warm 75.4°F (24.1°C). The average low-temperature, in May, is 72.7°F (22.6°C).

Humidity

In May, the average relative humidity is 77%.

Rainfall

In Hana, Hawaii, during May, the rain falls for 12.3 days and regularly aggregates up to 0.94" (24mm) of precipitation. 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.

Ocean temperature

In Hana, the average seawater temperature is 76.8°F (24.9°C).
Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.8°F (24.9°C) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 77°F (25°C) to 82.4°F (28°C).)

Daylight

In Hana, the average length of the day is 13.1h.

Sunshine

In Hana, the average sunshine is 10.8h.

UV index

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 threat to health from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 average humidity in May in Hana?

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

How many days does it rain in May in Hana?

In Hana, Hawaii, during May, the rain falls for 12.3 days and regularly aggregates up to 0.94" (24mm) of precipitation.

When it does not snow in Hana?

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

What is the ocean temperature in May in Hana?

In May, the average ocean temperature is 76.8°F (24.9°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.8°F (24.9°C) water may be enjoyable.

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

The average length of the day in May is 13.1h.

How many hours of sunshine does Hana have in May?

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

When is the lowest UV index in Hana?

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

What is the UV index reading in May in Hana?

In May, the average daily maximum UV index in Hana, Hawaii, is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
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Average temperature in May
Hana, HI

Average temperature in May - Hana, HI
  • Average high temperature in May: 24.1°C

The warmest month (with the highest average high temperature) is September (26.1°C).
The month with the lowest average high temperature is March (22.7°C).

  • Average low temperature in May: 22.6°C

The month with the highest average low temperature is September (24.5°C).
The coldest month (with the lowest average low temperature) is March (21°C).

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Average pressure in May
Hana, HI

Average pressure in May - Hana, HI
  • Average pressure in May: 1017.3mbar

The month with the highest atmospheric pressure is April (1017.8mbar).
The month with the lowest atmospheric pressure is October (1014.9mbar).

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Average wind speed in May
Hana, HI

Average wind speed in May - Hana, HI
  • Average wind speed in May: 20.2km/h

The windiest month (with the highest average wind speed) is June (23.2km/h).
The calmest month (with the lowest average wind speed) is January (17.6km/h).

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Average humidity in May
Hana, HI

Average humidity in May - Hana, HI
  • Average humidity in May: 77%

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

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Average rainfall in May
Hana, HI

Average rainfall in May - Hana, HI
  • Average rainfall in May: 24mm

The wettest month (with the highest rainfall) is October (55mm).
The driest month (with the least rainfall) is September (11mm).

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Average rainfall days in May
Hana, HI

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).

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Average snowfall days in May
Hana, HI

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).
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 sea temperature in May
Hana, HI

Average sea temperature in May - Hana, HI
  • Average sea temperature in May: 24.9°C

The best month for swimming (with the highest average sea temperature) is September (26.3°C).
The coldest month (with the lowest average sea temperature) is March (24.1°C).

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

Average daylight in May / Average sunshine in May - Hana, HI
  • Average daylight in May: 13.1h

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in May: 10.8h

Months with the most sunshine are June and July (Average sunshine: 11.3h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in May
Hana, HI

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).

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Average UV index in May
Hana, HI

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).
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
Hana, HI

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).

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Average visibility in May
Hana, HI

Average visibility in May - Hana, HI
  • Average visibility in May: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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