May weather forecastKailua, HI
May
Weather in May
May paves the way to summer with a palpable rise in Kailua's weather temperature to a high of 77.7°F (25.4°C). This is coupled with a stable relative humidity percentage of 75, maintaining the tropical feel. Despite a decrease in average rainfall to 0.98" (25mm), the number of daylight hours increases to a delightful 13.2. An impressive 10.8 hours of sunshine render Kailua's beaches picturesque, with ample weather conditions for water sports.Temperature
The initiation of May in Kailua records an average high-temperature of a still moderately hot 77.7°F (25.4°C), displaying a near consistency with the previous month. In Kailua, nights during May observe an average temperature decrease to a still moderately hot 74.1°F (23.4°C).Humidity
The average relative humidity in May is 75%.Rainfall
In Kailua, in May, during 15.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Ocean temperature
In May, the average ocean temperature in Kailua is 77.9°F (25.5°C).Note: Engaging in water activities, such as swimming or diving, in temperatures from 77°F (25°C) to 84.2°F (29°C) is very pleasurable for extended periods, without any discomfort.
Daylight
In Kailua, the average length of the day in May is 13h and 10min.On the first day of May in Kailua, sunrise is at 5:59 am and sunset at 6:56 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 7:09 pm HST.
Sunshine
In May, the average sunshine is 10.8h.UV index
The months with the lowest UV index are January through June, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 6 during May leads to these instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Kailua, HI
- Average high temperature in May: 77.7°F
The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).
- Average low temperature in May: 74.1°F
The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).
Average pressure in May
Kailua, 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
Kailua, HI
- Average wind speed in May: 11.6mph
The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).
Average humidity in May
Kailua, HI
- Average humidity in May: 75%
The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in May
Kailua, HI
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in May
Kailua, HI
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).
Average sea temperature in May
Kailua, 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
Kailua, HI
- Average daylight in May: 13h and 12min
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 48min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in May
Kailua, HI
- Average sunshine days in May: 9.3 days
The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).
Average UV index in May
Kailua, 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).
Average cloud cover in May
Kailua, HI
- Average cloud cover in May: 29
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in May
Kailua, 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).
