May weather forecast
Ewa Beach, HI

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Weather in May

May brings a significant shift in Ewa Beach, with the longest hours of sunshine peaking at 10.5 hours per day. Consequently, it becomes a prime month for beach sports and soaking up the Hawaiian sun. The rainfall continues to recede, and the winds moderate, further harmonizing the climatic conditions. As the ocean temperature rises, snorkeling and surfing gain momentum. Thereby, May stands out as the prelude to the grand Hawaiian summer.

Temperature

Ewa Beach, Hawaii, experiences a transition to a still warm 78.6°F (25.9°C) in average high-temperatures with the arrival of May, not greatly differing from April's 76.8°F (24.9°C). Nighttime temperature in Ewa Beach reflects an average dip to an agreeable 73°F (22.8°C) in May, subtly cooler than its daytime highs.

Humidity

The months with the lowest humidity in Ewa Beach, Hawaii, are January, April through June, August through November, with an average relative humidity of 74%.

Rainfall

In Ewa Beach, in May, during 16.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 172.2 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature in Ewa Beach is 78.3°F (25.7°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) are excellent for swimming, diving, and other water activities, providing comfort and enjoyment for extended periods without discomfort.

Daylight

In Ewa Beach, the average length of the day in May is 13h and 10min.
On the first day of the month, sunrise is at 6:00 am and sunset at 6:57 pm. On the last day of May, in Ewa Beach, sunrise is at 5:49 am and sunset at 7:10 pm HST.

Sunshine

In May, the average sunshine in Ewa Beach is 10.5h.

UV index

January through May, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during May leads to these instructions:
Ward off overexposure. Defence against solar harm is crucial. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Warning! The reflection of sand and water increases the UV dose.
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Frequently asked questions

What is the usual temperature for Ewa Beach in May?

The average high-temperature and low-temperature in Ewa Beach during May are 78.6°F (25.9°C) and 73°F (22.8°C) respectively.

What is the least humid month in Ewa Beach?

The months with the lowest humidity in Ewa Beach, Hawaii, are January, April through June, August through November, with an average relative humidity of 74%.

What is the average humidity in May in Ewa Beach?

The average relative humidity in May in Ewa Beach is 74%.

How much does it rain in Ewa Beach in May?

In Ewa Beach, Hawaii, in May, during 16.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

What is the water temperature in May in Ewa Beach?

In Ewa Beach, in May, the average water temperature is 78.3°F (25.7°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 May in Ewa Beach?

The average day length in May is 13h and 10min.

When is the sunrise / sunset in May in Ewa Beach?

On the first day of May, sunrise is at 6:00 am and sunset at 6:57 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 7:10 pm HST.

How many hours of sunshine does Ewa Beach have in May?

In Ewa Beach, the average sunshine duration in May is 10.5h.

What is the month with the lowest UV index in Ewa Beach?

January through May, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Ewa Beach, Hawaii.

How high is the UV index in May in Ewa Beach?

The average daily maximum UV index in May in Ewa Beach, Hawaii, is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in May
Ewa Beach, HI

Average temperature in May - Ewa Beach, HI
  • Average high temperature in May: 78.6°F

The warmest months (with the highest average high temperature) are August and September (81.5°F).
The month with the lowest average high temperature is February (74.8°F).

  • Average low temperature in May: 73°F

The months with the highest average low temperature are August and September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.4°F).

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Average pressure in May
Ewa Beach, HI

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

The months with the highest atmospheric pressure are March and 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
Ewa Beach, HI

Average wind speed in May - Ewa Beach, HI
  • Average wind speed in May: 9.6mph

The windiest month (with the highest average wind speed) is July (11.9mph).
The calmest months (with the lowest average wind speed) are January and October (9.1mph).

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Average humidity in May
Ewa Beach, HI

Average humidity in May - Ewa Beach, HI
  • Average humidity in May: 74%

The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).

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Average rainfall in May
Ewa Beach, HI

Average rainfall in May - Ewa Beach, HI
  • Average rainfall in May: 1.14"

The wettest month (with the highest rainfall) is March (1.77").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in May
Ewa Beach, HI

Average rainfall days in May - Ewa Beach, HI
  • Average rainfall days in May: 16.7 days

The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).

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Average sea temperature in May
Ewa Beach, HI

Average sea temperature in May - Ewa Beach, HI
  • Average sea temperature in May: 78.2°F

The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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Average daylight in May /
Average sunshine in May
Ewa Beach, HI

Average daylight in May / Average sunshine in May - Ewa Beach, HI
  • Average daylight in May: 13h and 1min

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 3min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

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Average sunshine days in May
Ewa Beach, HI

Average sunshine days in May - Ewa Beach, HI
  • Average sunshine days in May: 10.3 days

The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).

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Average UV index in May
Ewa Beach, HI

Average UV index in May - Ewa Beach, HI
  • Average UV index in May: 6

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

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Average cloud cover in May
Ewa Beach, HI

Average cloud cover in May - Ewa Beach, HI
  • Average cloud cover in May: 32

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in May
Ewa Beach, HI

Average visibility in May - Ewa Beach, 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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Ewa Beach, Hawaii, USA

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