May weather forecast
Kahului, HI

Weather in May

May, the last month of the spring in Kahului, is also a moderately hot month, with an average temperature varying between 73.4°F (23°C) and 77°F (25°C).

Temperature

In Kahului, the average high-temperature in May is almost the same as in April - a still moderately hot 77°F (25°C). The average low-temperature, in Kahului, is 73.4°F (23°C).

Humidity

In Kahului, Hawaii, the average relative humidity in May is 75%.

Rainfall

In Kahului, during 8.3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. In Kahului, during the entire year, the rain falls for 103.4 days and collects up to 6.57" (167mm) of precipitation.

Ocean temperature

In Kahului, the average seawater temperature in May is 77.4°F (25.2°C).
Note: 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.

Daylight

In May, the average length of the day in Kahului is 13h and 8min.
On the first day of May in Kahului, sunrise is at 5:55 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 7:03 pm HST.

Sunshine

The average sunshine in May in Kahului is 11h.

UV index

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
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. 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 temperature in May in Kahului?

In Kahului, in May, the average high-temperature is 77°F (25°C), and the average low-temperature is 73.4°F (23°C).

What is the average humidity in May in Kahului?

The average relative humidity in May in Kahului, Hawaii, is 75%.

How much does it rain in Kahului in May?

In May, the rain falls for 8.3 days. Throughout May, 0.43" (11mm) of precipitation is accumulated.

What is the ocean temperature in May in Kahului?

In Kahului, the average seawater temperature in May is 77.4°F (25.2°C). 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.

How many hours of daylight does Kahului have in May?

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

When are sunrise and sunset in May in Kahului?

In May, on the first day of the month, sunrise is at 5:55 am and sunset at 6:50 pm. On the last day of the month, in Kahului, Hawaii, sunrise is at 5:44 am and sunset at 7:03 pm HST.

How long on average sun shines in May in Kahului?

In May, the average sunshine duration in Kahului is 11h.

What are the months with the lowest UV index in Kahului?

The months with the lowest UV index are January through June, November and December, with an average maximum UV index of 6.

What is the UV index reading in May in Kahului?

In Kahului, Hawaii, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in May
Kahului, HI

Average temperature in May - Kahului, HI
  • Average high temperature in May: 77°F

The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).

  • Average low temperature in May: 73.4°F

The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).

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Average pressure in May
Kahului, HI

Average pressure in May - Kahului, HI
  • Average pressure in May: 30.04"Hg

The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in May
Kahului, HI

Average wind speed in May - Kahului, HI
  • Average wind speed in May: 11.7mph

The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).

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Average humidity in May
Kahului, HI

Average humidity in May - Kahului, HI
  • Average humidity in May: 75%

The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).

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Average rainfall in May
Kahului, HI

Average rainfall in May - Kahului, HI
  • Average rainfall in May: 0.43"

The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").

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Average rainfall days in May
Kahului, HI

Average rainfall days in May - Kahului, HI
  • Average rainfall days in May: 8.3 days

The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).

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Average sea temperature in May
Kahului, HI

Average sea temperature in May - Kahului, HI
  • Average sea temperature in May: 77.3°F

The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (75.6°F).

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

Average daylight in May / Average sunshine in May - Kahului, HI
  • Average daylight in May: 13h and 8min

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 May: 11h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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Average sunshine days in May
Kahului, HI

Average sunshine days in May - Kahului, HI
  • Average sunshine days in May: 18.5 days

The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).

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Average UV index in May
Kahului, HI

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

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

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Average cloud cover in May
Kahului, HI

Average cloud cover in May - Kahului, HI
  • Average cloud cover in May: 25

The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).

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Average visibility in May
Kahului, HI

Average visibility in May - Kahului, 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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