This report describes the typical weather at the Florida Keys Marathon Airport (Marathon, Florida, United States) weather station over the course of an average February. It is based on the historical records from 1998 to 2012. Earlier records are either unavailable or unreliable.
Marathon, Florida has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (100%).
The month of February is characterized by gradually rising daily high temperatures, with daily highs around 77°F throughout the month, exceeding 83°F or dropping below 68°F only one day in ten.
Over the course of February, the length of the day is gradually increasing. The shortest day of the month is February 1 with 11:02 hours of daylight; the longest day is February 29 with 11:40 hours of daylight.
The earliest sunrise is at 6:47am on February 29; the latest sunset is at 6:27pm on February 29; the latest sunrise is at 7:07am on February 1; the earliest sunset is at 6:09pm on February 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in February, so the entire month is in standard time.
The median cloud cover is 14% (mostly clear) and does not vary substantially over the course of the month.
On February 15, a representative day, the sky is clear or mostly clear 64% of the time, partly cloudy 8% of the time, and mostly cloudy or overcast 25% of the time.
The average probability that some form of precipitation will be observed in a given day is 21%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are light rain, thunderstorms, moderate rain, and heavy rain.
Light rain is the most severe precipitation observed during 43% of those days with precipitation. It is most likely around February 1, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 21% of those days with precipitation. They are most likely around February 28, when it is observed during 5% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around February 16, when it is observed during 4% of all days.
Heavy rain is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around February 21, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in February or this station does not reliably report precipitation types.
The relative humidity typically ranges from 57% (mildly humid) to 87% (very humid) over the course of a typical February, rarely dropping below 46% (comfortable) and reaching as high as 97% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 64% (mildly humid) three days out of four; it is most humid around February 1, rising above 82% (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 February, the dew point typically varies from 57°F (comfortable) to 66°F (muggy) and is rarely below 46°F (dry) or above 73°F (very muggy).
Over the course of February typical wind speeds vary from 3 mph to 13 mph (light air to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around February 28, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around February 18, at which time the average daily maximum wind speed is 13 mph (moderate breeze).