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 November. 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 November is characterized by falling daily high temperatures, with daily highs decreasing from 66Â°F to 62Â°F over the course of the month, exceeding 79Â°F or dropping below 53Â°F only one day in ten.
Over the course of November, the length of the day is gradually decreasing. The shortest day of the month is November 29 with 10:08 hours of daylight; the longest day is November 1 with 10:48 hours of daylight.
The earliest sunrise is at 6:15am on November 4; the latest sunset is at 6:01pm on November 1; the latest sunrise is at 7:14am on November 3; the earliest sunset is at 4:46pm on November 28.
Daylight savings time (DST) ends at 1:00am on November 4, 2012, shifting sunrise and sunset to an hour earlier.
The median cloud cover ranges from 10% (clear) to 15% (mostly clear). The trend is for the sky to be clearing with the median cloud cover decreasing by 5% from the start to the end of the month.
On November 15, a representative day, the sky is clear or mostly clear 66% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 31% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around November 29, occurring in 23% of days. Precipitation is least likely around November 1, occurring in 16% of days.
Throughout November, the most common forms of precipitation are light rain, moderate rain, and heavy rain.
Light rain is the most severe precipitation observed during 60% of those days with precipitation. It is most likely around November 29, when it is observed during 14% of all days.
Moderate rain is the most severe precipitation observed during 20% of those days with precipitation. It is most likely around November 30, when it is observed during 6% of all days.
Heavy rain is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around November 15, when it is observed during 3% of all days.
Either snow is exceptionally unlikely to fall at this location in November or this station does not reliably report precipitation types.
The relative humidity typically ranges from 33% (comfortable) to 81% (humid) over the course of a typical November, rarely dropping below 11% (very dry) and reaching as high as 100% (very humid).
The air is driest around November 25, at which time the relative humidity drops below 46% (comfortable) three days out of four; it is most humid around November 3, rising above 69% (mildly 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 November, the dew point typically varies from 25Â°F (dry) to 50Â°F (dry) and is rarely below 8Â°F (dry) or above 55Â°F (comfortable).
Over the course of November typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around November 30, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around November 14, at which time the average daily maximum wind speed is 12 mph (gentle breeze).