May weather forecastKapaau, HI
May
Weather in May
May, the last month of the spring in Kapaau, is another refreshing month, with an average temperature varying between 64.2°F (17.9°C) and 55.9°F (13.3°C).Temperature
Kapaau's average high-temperature in May sits at a still refreshing 64.2°F (17.9°C), showing little difference from the previous month. Kapaau's nighttime average temperature in May subtly descends to a moderate 55.9°F (13.3°C) from the daily highs.Humidity
In May, the average relative humidity is 82%.Rainfall
In May, the rain falls for 26.5 days. Throughout May, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 280.8 rainfall days, and 33.9" (861mm) of precipitation is accumulated.Daylight
The average length of the day in May is 13h and 6min.On the first day of May, sunrise is at 5:53 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 6:59 pm HST.
Sunshine
In May, the average sunshine is 9.5h.UV index
The months with the highest UV index are May through October, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Kapaau, HI
- Average high temperature in May: 64.2°F
The warmest month (with the highest average high temperature) is August (67.5°F).
The month with the lowest average high temperature is March (61.9°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is September (59°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in May
Kapaau, HI
- Average pressure in May: 30.03"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
Kapaau, HI
- Average wind speed in May: 4.5mph
The windiest months (with the highest average wind speed) are July and August (5.5mph).
The calmest months (with the lowest average wind speed) are January, May and October (4.5mph).
Average humidity in May
Kapaau, HI
- Average humidity in May: 82%
The months with the highest relative humidity are September and October (84%).
The month with the lowest relative humidity is February (78%).
Average rainfall in May
Kapaau, HI
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is June (1.57").
Average rainfall days in May
Kapaau, HI
- Average rainfall days in May: 26.5 days
The month with the highest number of rainy days is September (27.3 days).
The month with the least rainy days is January (17.1 days).
Average daylight in May /
Average sunshine in May
Kapaau, 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: 10h and 54min).
- Average sunshine in May: 9h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in May
Kapaau, HI
- Average sunshine days in May: 3.3 days
The month with the most sunshine days is January (9.7 days).
The month with the least sunshine days is September (0.8 days).
Average UV index in May
Kapaau, HI
- Average UV index in May: 5
The months with the highest UV index are May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in May
Kapaau, HI
- Average cloud cover in May: 42
The months with the most cloud cover are April and September (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in May
Kapaau, 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).
