May weather forecastPearl City, HI
May
Weather in May
Pearl City experiences the onset of the warmer months with May seeing an average high temperature of about 78.6°F (25.9°C). Despite the rise in temperature, weather conditions remain pleasing with cool gusts performing a balancing act. Sea temperatures start to climb, transforming the coastline into an inviting prospect for swimmers and surfers. Sunshine peaks during this time of the year making for more glorious Hawaiian mornings. Rainfall sees a drop from April, reinforcing that summer is indeed around the corner.Temperature
Pearl City registers an average high-temperature of a still warm 78.6°F (25.9°C) with the arrival of May, showing minor deviation from the preceding month. Throughout May, Pearl City records a steady low-temperature average of 72.1°F (22.3°C), a minor decrease from its daytime counterpart.Humidity
April through June and September, with an average relative humidity of 74%, are the least humid months.Rainfall
In May, the rain falls for 18.4 days. Throughout May, 1.46" (37mm) of precipitation is accumulated. In Pearl City, during the entire year, the rain falls for 208.4 days and collects up to 16.5" (419mm) of precipitation.Ocean temperature
In Pearl City, 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) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.
Daylight
In Pearl City, Hawaii, the average length of the day in May is 13h and 10min.On the first day of the month, sunrise is at 6:00 am and sunset at 6:57 pm. On the last day of May, sunrise is at 5:49 am and sunset at 7:10 pm HST.
Sunshine
In Pearl City, Hawaii, the average sunshine in May is 9.5h.UV index
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: During May, 6 as the daily maximum UV index converts into the following advice:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be mindful! Sand and water reflections can up the Sun's UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Pearl City, HI
- Average high temperature in May: 78.6°F
The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).
- Average low temperature in May: 72.1°F
The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).
Average pressure in May
Pearl City, 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
Pearl City, HI
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).
Average humidity in May
Pearl City, 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, June and September (74%).
Average rainfall in May
Pearl City, HI
- Average rainfall in May: 1.46"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in May
Pearl City, HI
- Average rainfall days in May: 18.4 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).
Average sea temperature in May
Pearl City, 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
Pearl City, 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: 9h and 30min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in May
Pearl City, HI
- Average sunshine days in May: 8.7 days
The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in May
Pearl City, HI
- Average UV index in May: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in May
Pearl City, HI
- Average cloud cover in May: 40
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).
Average visibility in May
Pearl City, 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).
