This report describes the typical weather at the Palm Beach International Airport (West Palm Beach, Florida, 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.
West Palm Beach, Florida has a tropical rainforest climate with no dry season. The area within 25 mi of this station is covered by oceans and seas (39%), croplands (37%), grasslands (12%), forests (5%), and built-up areas (4%).
The month of March is characterized by gradually rising daily high temperatures, with daily highs around 78°F throughout the month, exceeding 86°F or dropping below 70°F only one day in ten.
Over the course of March, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 47 minutes, implying an average day-over-day increase of 1.5 minutes.
The shortest day of the month is March 1 with 11:38 hours of daylight; the longest day is March 31 with 12:25 hours of daylight.
The earliest sunrise is at 6:35am on March 10; the latest sunset is at 7:37pm on March 30; the latest sunrise is at 7:33am on March 11; the earliest sunset is at 6:22pm on March 1.
Daylight savings time (DST) starts at 3:00am on March 11, 2012, shifting sunrise and sunset to an hour later.
The median cloud cover is 49% (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 39% of the time, partly cloudy 26% of the time, and mostly cloudy or overcast 33% of the time.
The average probability that some form of precipitation will be observed in a given day is 30%, with little variation over the course of the month.
Throughout March, the most common forms of precipitation are light rain, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 42% of those days with precipitation. It is most likely around March 1, when it is observed during 14% of all days.
Moderate rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around March 1, when it is observed during 9% of all days.
Thunderstorms are the most severe precipitation observed during 23% of those days with precipitation. They are most likely around March 31, when it is observed during 8% 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 51% (mildly humid) to 90% (very humid) over the course of a typical March, rarely dropping below 36% (comfortable) and reaching as high as 100% (very humid).
The air is driest around March 30, 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 85% (very 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 53°F (very comfortable) to 65°F (mildy humid) and is rarely below 37°F (dry) or above 72°F (very muggy).
The time of the month between March 1 and March 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of March typical wind speeds vary from 3 mph to 18 mph (light air to moderate breeze), rarely exceeding 24 mph (fresh breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around March 21, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 11 mph (gentle breeze) occurs around March 1, at which time the average daily maximum wind speed is 17 mph (moderate breeze).