Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The advent of May sees the average high-temperature at a still moderately hot 76.8°F (24.9°C), subtly shifted from April's 74.8°F (23.8°C). In Wailua, nights during May observe an average temperature decrease to a pleasant 72.1°F (22.3°C).Humidity
In May, the average relative humidity is 76%.Rainfall
In Wailua, in May, during 18.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Wailua, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.Ocean temperature
In May, the average ocean temperature is 77.5°F (25.3°C).Note: For any water activity, having surface water temperatures from 77°F (25°C) to 84.2°F (29°C) is considered outstanding and highly delightful for lengthened periods.
Daylight
In Wailua, the average length of the day in May is 13h and 12min.On the first day of May, sunrise is at 6:04 am and sunset at 7:03 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:17 pm HST.
Sunshine
The average sunshine in May 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. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 6 in May leads to these guidelines:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Beware! Reflections from sand and water can intensify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Wailua in May?
What is the average humidity in May?
How much does it rain in May?
What is the water temperature in May?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
When is the lowest UV index?
What is the UV index reading in May?
Average temperature in May
Wailua, 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).
Average pressure in May
Wailua, 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).
Average wind speed in May
Wailua, 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).
Average humidity in May
Wailua, 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%).
Average rainfall in May
Wailua, 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").
Average rainfall days in May
Wailua, 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).
Average sea temperature in May
Wailua, HI
- Average sea temperature in May: 77.5°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (74.8°F).
Average daylight in May /
Average sunshine in May
Wailua, HI
- Average daylight in May: 13h and 1min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in May: 9h and 2min
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).
Average sunshine days in May
Wailua, 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).
Average UV index in May
Wailua, 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
Wailua, 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).
Average visibility in May
Wailua, 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).
Wailua, Hawaii, USA
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