This report describes the typical weather at the Catalina Airport (Avalon/Santa Catalina Island, California, United States) weather station over the course of an average March. It is based on the historical records from 2000 to 2012. Earlier records are either unavailable or unreliable.
Avalon/Santa Catalina Island, California has a cold desert climate. The area within 25 mi of this station is covered by oceans and seas (96%) and shrublands (4%).
The month of March is characterized by gradually rising daily high temperatures, with daily highs around 60°F throughout the month, exceeding 71°F or dropping below 50°F only one day in ten.
Over the course of March, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:02 hours, implying an average day-over-day increase of 2.0 minutes.
The shortest day of the month is March 1 with 11:30 hours of daylight; the longest day is March 31 with 12:31 hours of daylight.
The earliest sunrise is at 6:10am on March 10; the latest sunset is at 7:14pm on March 31; the latest sunrise is at 7:09am on March 11; the earliest sunset is at 5:51pm 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 ranges from 26% (mostly clear) to 35% (mostly clear).
On March 16, a representative day, the sky is clear or mostly clear 49% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 36% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 6, occurring in 21% of days. Precipitation is least likely around March 30, occurring in 17% of days.
Throughout March, the most common forms of precipitation are light rain, moderate rain, and heavy rain.
Light rain is the most severe precipitation observed during 52% of those days with precipitation. It is most likely around March 28, when it is observed during 11% of all days.
Moderate rain is the most severe precipitation observed during 26% of those days with precipitation. It is most likely around March 3, when it is observed during 6% of all days.
Heavy rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around March 1, when it is observed during 5% 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 44% (comfortable) to 87% (very humid) over the course of a typical March, rarely dropping below 18% (dry) and reaching as high as 100% (very humid).
The air is driest around March 12, at which time the relative humidity drops below 61% (mildly humid) three days out of four; it is most humid around March 28, rising above 81% (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 31°F (dry) to 47°F (dry) and is rarely below 17°F (dry) or above 53°F (very comfortable).
Over the course of March typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around March 1, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around March 29, at which time the average daily maximum wind speed is 14 mph (moderate breeze).