This report describes the typical weather at the Honolulu International Airport (Honolulu, Hawaii, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Honolulu, Hawaii has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (97%) and built-up areas (3%).
Over the course of a year, the temperature typically varies from 66°F to 88°F and is rarely below 61°F or above 91°F.
The warm season lasts from June 27 to October 14 with an average daily high temperature above 86°F. The hottest day of the year is August 28, with an average high of 88°F and low of 75°F.
The cold season lasts from December 11 to March 28 with an average daily high temperature below 81°F. The coldest day of the year is February 1, with an average low of 66°F and high of 79°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:50 hours of daylight; the longest day is June 20 with 13:26 hours of daylight.
The earliest sunrise is at 5:49am on June 7 and the latest sunset is at 7:18pm on July 3. The latest sunrise is at 7:12am on January 16 and the earliest sunset is at 5:48pm on November 25.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 50% (partly cloudy) and does not vary substantially over the course of the year.
On January 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
On October 28, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 72% of the time, and clear or mostly clear 28% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around November 29, occurring in 43% of days. Precipitation is least likely around September 5, occurring in 32% of days.
Over the entire year, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 68% of those days with precipitation. It is most likely around July 6, when it is observed during 31% of all days.
Moderate rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around December 31, when it is observed during 11% of all days.
During the warm season, which lasts from June 27 to October 14, there is a 36% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (72% of days with precipitation have at worst light rain) and moderate rain (21%).
During the cold season, which lasts from December 11 to March 28, there is a 39% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (61% of days with precipitation have at worst light rain), moderate rain (26%), heavy rain (8%), and thunderstorms (5%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 48% (comfortable) to 88% (very humid) over the course of the year, rarely dropping below 42% (comfortable) and reaching as high as 97% (very humid).
The air is driest around June 12, at which time the relative humidity drops below 52% (mildly humid) three days out of four; it is most humid around January 1, exceeding 84% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 59°F (comfortable) to 70°F (muggy) and is rarely below 52°F (very comfortable) or above 74°F (very muggy).
The time of the year between February 9 and March 14 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of the year typical wind speeds vary from 0 mph to 19 mph (calm to fresh breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 13 mph (moderate breeze) occurs around June 27, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around January 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).