May weather forecastKilauea, HI

May

Weather in May

The last month of the spring, May, is also a moderately hot month in Kilauea, Hawaii, with temperature in the range of an average high of 76.8°F (24.9°C) and an average low of 72.1°F (22.3°C).

Temperature

May is marked by an average high-temperature of a still moderately hot 76.8°F (24.9°C), almost identical to the preceding month. The low temperature average during May reflects a slight decrease to a pleasant 72.1°F (22.3°C) from the day's peak.

Humidity

The average relative humidity in May is 76%.

Rainfall

In Kilauea, in May, it is raining for 18.5 days, with typically 1.57" (40mm) of accumulated precipitation. In Kilauea, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.

Daylight

The average length of the day in May is 13h and 13min.
On the first day of May, sunrise is at 6:04 am and sunset at 7:04 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:17 pm HST.

Sunshine

In May, the average sunshine is 9.3h.

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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: An average UV index of 6 in May transforms into this advice:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Updated: Aug 1, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during May is 76.8°F (24.9°C) and the low-temperature is 72.1°F (22.3°C).

In Kilauea, the average relative humidity in May is 76%.

In Kilauea, in May, during 18.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated.

The average day length in May is 13h and 13min.

On the first day of May, sunrise is at 6:04 am and sunset at 7:04 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:17 pm HST.

In Kilauea, the average sunshine duration in May is 9.3h.

The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6.

The average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

74.8°F

76.8°F

78.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.8mph

10.8mph

12.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

5.7

6.7

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Kilauea, HI

Average high temperature in May: 76.8°F

The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).

Average low temperature in May: 72.1°F

The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).

Average pressure in May
Kilauea, HI

Average pressure in May: 30.05"Hg

The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).

Average wind speed in May
Kilauea, HI

Average wind speed in May: 10.5mph

The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).

Average humidity in May
Kilauea, HI

Average humidity in May: 76%

The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).

Average rainfall in May
Kilauea, HI

Average rainfall in May: 1.57"

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

Average rainfall days in May
Kilauea, HI

Average rainfall days in May: 18.5 days

The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).

Average daylight in May /
Average sunshine in May
Kilauea, HI

Average daylight in May: 13h and 12min

The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).

Average sunshine in May: 9h and 18min

The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).

Average sunshine days in May
Kilauea, HI

Average sunshine days in May: 6.7 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

Average UV index in May
Kilauea, 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
Kilauea, HI

Average cloud cover in May: 41

The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).

Average visibility in May
Kilauea, 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).