This report describes the typical weather at the Pensacola Naval Air Station (Pensacola, Florida, United States) weather station over the course of an average December. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Pensacola, Florida has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (55%), forests (20%), croplands (16%), grasslands (7%), and built-up areas (3%).
The month of December is characterized by falling daily high temperatures, with daily highs decreasing from 67°F to 61°F over the course of the month, exceeding 76°F or dropping below 48°F only one day in ten.
Over the course of December, the length of the day is essentially constant. The shortest day of the month is December 24 with 10:11 hours of daylight; the longest day is December 1 with 10:19 hours of daylight.
The earliest sunrise is at 6:29am on December 1; the latest sunset is at 4:59pm on December 31; the latest sunrise is at 6:46am on December 31; the earliest sunset is at 4:48pm on December 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in December, so the entire month is in standard time.
The median cloud cover ranges from 55% (partly cloudy) to 68% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 13% from the start to the end of the month.
On December 1, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 55% of the time, and overcast or mostly cloudy 41% of the time.
On December 31, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 59% of the time, and clear or mostly clear 36% of the time.
The average probability that some form of precipitation will be observed in a given day is 37%, with little variation over the course of the month.
Throughout December, the most common forms of precipitation are light rain, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 48% of those days with precipitation. It is most likely around December 28, when it is observed during 18% of all days.
Moderate rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around December 30, when it is observed during 9% of all days.
Thunderstorms are the most severe precipitation observed during 14% of those days with precipitation. They are most likely around December 20, when it is observed during 5% of all days.
Either snow is exceptionally unlikely to fall at this location in December or this station does not reliably report precipitation types.
The relative humidity typically ranges from 53% (mildly humid) to 89% (very humid) over the course of a typical December, rarely dropping below 28% (dry) and reaching as high as 100% (very humid).
The air is driest around December 11, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around December 3, rising above 83% (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 December, the dew point typically varies from 36°F (dry) to 54°F (very comfortable) and is rarely below 18°F (dry) or above 69°F (muggy).
The time of the month between December 1 and December 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of December typical wind speeds vary from 2 mph to 15 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around December 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around December 1, at which time the average daily maximum wind speed is 14 mph (moderate breeze).