May weather forecastKahului, HI
May
Weather in May
By the time May arrives, Kahului has already begun to display the signs of the approaching tropical summer. The increased daylight hours coupled with longer sunshine duration facilitate longer days packed with outdoor activities. In this month, temperatures swing from 73.4°F (23°C) to a warming 77°F (25°C). Albeit the humidity also goes up a notch, it is compensated by the cooling winds. The rain showers become significantly infrequent, amounting to a more comfortable weather.Temperature
May's commencement is accompanied by an average high-temperature of a still moderately hot 77°F (25°C), diverging marginally from April's 75.6°F (24.2°C). Kahului's nocturnal average in May closely mirrors its daytime temperatures, settling at a still warm 73.4°F (23°C).Humidity
The average relative humidity in May is 75%.Rainfall
In Kahului, in May, during 8.3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 103.4 rainfall days, and 6.57" (167mm) of precipitation is accumulated.Ocean temperature
In Kahului, in May, the average water temperature is 77.4°F (25.2°C).Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for all water activities, offering enjoyment without causing discomfort over extended periods.
Daylight
The average length of the day in May is 13h and 8min.On the first day of the month, sunrise is at 5:54 am and sunset at 6:50 pm. On the last day of May, sunrise is at 5:44 am and sunset at 7:03 pm HST.
Sunshine
In May, the average sunshine is 11h.UV index
January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 6 during May translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Kahului, HI
- Average high temperature in May: 77°F
The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in May: 73.4°F
The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).
Average pressure in May
Kahului, 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
Kahului, HI
- Average wind speed in May: 11.7mph
The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).
Average humidity in May
Kahului, HI
- Average humidity in May: 75%
The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in May
Kahului, HI
- Average rainfall in May: 0.43"
The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in May
Kahului, HI
- Average rainfall days in May: 8.3 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).
Average sea temperature in May
Kahului, HI
- Average sea temperature in May: 77.3°F
The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (75.6°F).
Average daylight in May /
Average sunshine in May
Kahului, HI
- Average daylight in May: 13h and 6min
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: 11h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in May
Kahului, HI
- Average sunshine days in May: 18.5 days
The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).
Average UV index in May
Kahului, 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
Kahului, HI
- Average cloud cover in May: 25
The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).
Average visibility in May
Kahului, 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).
