May weather forecastWainaku, HI
May
Weather in May
The last month of the spring, May, is also an agreeable month in Wainaku, Hawaii, with an average temperature varying between 72.1°F (22.3°C) and 66.2°F (19°C).Temperature
Wainaku's average high-temperature in May is a still pleasant 72.1°F (22.3°C), marking an insignificant difference from the 70.9°F (21.6°C) of April. The month of May is marked by an average minimum temperature of 66.2°F (19°C), slightly cooler than its daytime counterpart.Humidity
The months with the lowest humidity are January, May through July, with an average relative humidity of 78%.Rainfall
In Wainaku, in May, it is raining for 20.2 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, there are 227.7 rainfall days, and 27.83" (707mm) of precipitation is accumulated.Ocean temperature
In Wainaku, the average seawater temperature in May is 76.8°F (24.9°C).Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 76.8°F (24.9°C) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 77°F (25°C) to 82.4°F (28°C).)
Daylight
In May, the average length of the day in Wainaku is 13h and 5min.On the first day of the month, sunrise is at 5:50 am and sunset at 6:43 pm. On the last day of May, sunrise is at 5:40 am and sunset at 6:55 pm HST.
Sunshine
In Wainaku, the average sunshine in May is 10.6h.UV index
The months with the highest UV index are May through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 6 during May morphs into the following directions:
Resist extreme sun exposure. Guarding against solar damage is essential. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Wainaku, HI
- Average high temperature in May: 72.1°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is March (69.6°F).
- Average low temperature in May: 66.2°F
The month with the highest average low temperature is September (70°F).
The coldest month (with the lowest average low temperature) is March (64°F).
Average pressure in May
Wainaku, 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).
Average wind speed in May
Wainaku, HI
- Average wind speed in May: 7mph
The windiest month (with the highest average wind speed) is August (7.6mph).
The calmest month (with the lowest average wind speed) is October (6.7mph).
Average humidity in May
Wainaku, HI
- Average humidity in May: 78%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are January, May, June and July (78%).
Average rainfall in May
Wainaku, HI
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is February (3.78").
The driest month (with the least rainfall) is June (1.1").
Average rainfall days in May
Wainaku, HI
- Average rainfall days in May: 20.2 days
The month with the highest number of rainy days is March (22.9 days).
The month with the least rainy days is January (13.3 days).
Average sea temperature in May
Wainaku, HI
- Average sea temperature in May: 76.9°F
The best month for swimming (with the highest average sea temperature) is September (79.3°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in May /
Average sunshine in May
Wainaku, HI
- Average daylight in May: 13h and 6min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in May: 10h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in May
Wainaku, HI
- Average sunshine days in May: 3.3 days
The month with the most sunshine days is January (12.1 days).
The month with the least sunshine days is August (1.8 days).
Average UV index in May
Wainaku, HI
- Average UV index in May: 6
The months with the highest UV index are May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March and April (UV index 5).
Average cloud cover in May
Wainaku, HI
- Average cloud cover in May: 33
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in May
Wainaku, 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).
