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 transition from April to May brings an average high-temperature of a still warm 78.4°F (25.8°C), barely different from April's 76.6°F (24.8°C). During the nights of May, Honolulu records an average temperature of 72.7°F (22.6°C), a minor drop from daytime peaks.Humidity
April, May, September and November, with an average relative humidity of 74%, are the least humid months.Rainfall
In Honolulu, during May, the rain falls for 17.1 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, in Honolulu, Hawaii, there are 197.2 rainfall days, and 14.61" (371mm) of precipitation is accumulated.Ocean temperature
In Honolulu, the average seawater temperature in May is 77.9°F (25.5°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 Honolulu, the average length of the day in May is 13h and 10min.On the first day of the month, sunrise is at 5:59 am and sunset at 6:56 pm. On the last day of May, in Honolulu, sunrise is at 5:48 am and sunset at 7:09 pm HST.
Sunshine
The average sunshine in May in Honolulu, Hawaii, is 10.3h.UV index
January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: During May, 6 as the daily maximum UV index converts into the following advice:
Shield from overexposure. Defense against sun-related harm is required. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Beware! Reflections from sand and water can intensify the Sun's UV radiation.
Frequently asked questions
What are May temperatures in Honolulu?
What are the least humid months in Honolulu?
What is the average humidity in May in Honolulu?
How many days does it rain in May in Honolulu?
What is the water temperature in May in Honolulu?
What is the average length of the day in May in Honolulu?
When are sunrise and sunset in May in Honolulu?
How many hours of sunshine does Honolulu have in May?
What are the months with the lowest UV index in Honolulu?
How high is the UV index in May in Honolulu?
Average temperature in May
Honolulu, HI
- Average high temperature in May: 78.4°F
The warmest month (with the highest average high temperature) is September (81.5°F).
The months with the lowest average high temperature are February and March (75°F).
- Average low temperature in May: 72.7°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in May
Honolulu, 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
Honolulu, HI
- Average wind speed in May: 9.7mph
The windiest month (with the highest average wind speed) is July (12.1mph).
The calmest month (with the lowest average wind speed) is January (9mph).
Average humidity in May
Honolulu, HI
- Average humidity in May: 74%
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, September and November (74%).
Average rainfall in May
Honolulu, HI
- Average rainfall in May: 1.18"
The wettest months (with the highest rainfall) are March and October (1.81").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in May
Honolulu, HI
- Average rainfall days in May: 17.1 days
The months with the highest number of rainy days are March and October (18 days).
The month with the least rainy days is January (12.6 days).
Average sea temperature in May
Honolulu, HI
- Average sea temperature in May: 78°F
The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in May /
Average sunshine in May
Honolulu, 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days in May
Honolulu, HI
- Average sunshine days in May: 9.3 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is October (6.3 days).
Average UV index in May
Honolulu, HI
- Average UV index in May: 6
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in May
Honolulu, HI
- Average cloud cover in May: 35
The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are January and September (Cloud cover 33).
Average visibility in May
Honolulu, 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).
Honolulu, Hawaii, USA
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