This report describes the typical weather at the Southwest Florida International Airport (South Fort Myers, Florida, United States) weather station over the course of an average March. It is based on the historical records from 1984 to 2012. Earlier records are either unavailable or unreliable.
South Fort Myers, Florida has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by croplands (68%), oceans and seas (18%), grasslands (9%), forests (3%), and built-up areas (2%).
The month of March is characterized by gradually rising daily high temperatures, with daily highs ranging from 78°F to 82°F over the course of the month, exceeding 87°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 6:41am on March 10; the latest sunset is at 7:44pm on March 30; the latest sunrise is at 7:40am on March 11; the earliest sunset is at 6:29pm 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 25% (mostly clear) and does not vary substantially over the course of the month.
On March 16, a representative day, the sky is clear or mostly clear 56% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 31% of the time.
The average probability that some form of precipitation will be observed in a given day is 23%, with little variation over the course of the month.
Throughout March, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around March 1, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 30% of those days with precipitation. They are most likely around March 31, when it is observed during 9% of all days.
Moderate rain is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around March 11, when it is observed during 6% 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 47% (comfortable) to 95% (very humid) over the course of a typical March, rarely dropping below 30% (comfortable) and reaching as high as 100% (very humid).
The air is driest around March 31, at which time the relative humidity drops below 52% (mildly humid) three days out of four; it is most humid around March 26, rising above 93% (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 50°F (very comfortable) to 65°F (mildy humid) and is rarely below 35°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 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around March 12, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around March 31, at which time the average daily maximum wind speed is 16 mph (moderate breeze).