This report describes the typical weather at the Honolulu International Airport (Honolulu, Hawaii, United States) weather station over the course of an average March. 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%).
The month of March is characterized by essentially constant daily high temperatures, with daily highs around 81°F throughout the month, exceeding 84°F or dropping below 77°F only one day in ten.
Over the course of March, the length of the day is gradually increasing. The shortest day of the month is March 1 with 11:44 hours of daylight; the longest day is March 31 with 12:22 hours of daylight.
The earliest sunrise is at 6:25am on March 31; the latest sunset is at 6:47pm on March 31; the latest sunrise is at 6:52am on March 1; the earliest sunset is at 6:36pm on March 1.
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 month.
On March 16, a representative day, the sky is clear or mostly clear 29% of the time, partly cloudy 36% of the time, and mostly cloudy or overcast 34% of the time.
The average probability that some form of precipitation will be observed in a given day is 40%, with little variation over the course of the month.
Throughout March, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 64% of those days with precipitation. It is most likely around March 31, when it is observed during 28% of all days.
Moderate rain is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around March 20, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in March or this station does not reliably report precipitation types.
The relative humidity typically ranges from 53% (mildly humid) to 85% (humid) over the course of a typical March, rarely dropping below 44% (comfortable), or exceeding 95% (very humid).
The air is driest around March 28, at which time the relative humidity drops below 57% (mildly humid) three days out of four; it is most humid around March 1, rising above 79% (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 typical March, the dew point typically varies from 59°F (comfortable) to 66°F (muggy) and is rarely below 54°F (very comfortable) or above 70°F (muggy).
Over the course of March typical wind speeds vary from 2 mph to 18 mph (light air to fresh breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around March 28, at which time the average daily maximum wind speed is 18 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around March 1, at which time the average daily maximum wind speed is 17 mph (moderate breeze).