This report describes the typical weather at the Lackland Air Force Base (San Antonio, Texas, United States) weather station over the course of an average February. It is based on the historical records from 1991 to 2012. Earlier records are either unavailable or unreliable.
San Antonio, Texas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (53%), croplands (24%), forests (13%), and built-up areas (9%).
The month of February is characterized by rising daily high temperatures, with daily highs ranging from 65°F to 72°F over the course of the month, exceeding 82°F or dropping below 51°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 10:48 hours of daylight; the longest day is February 29 with 11:33 hours of daylight.
The earliest sunrise is at 7:00am on February 29; the latest sunset is at 6:33pm on February 29; the latest sunrise is at 7:24am on February 1; the earliest sunset is at 6:12pm 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 78% (partly cloudy) and does not vary substantially over the course of the month.
On February 15, a representative day, the sky is clear or mostly clear 30% of the time, partly cloudy 10% of the time, and mostly cloudy or overcast 53% of the time.
The average probability that some form of precipitation will be observed in a given day is 40%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are light rain, drizzle, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around February 4, when it is observed during 17% of all days.
Drizzle is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around February 25, when it is observed during 11% of all days.
Thunderstorms are the most severe precipitation observed during 15% of those days with precipitation. They are most likely around February 29, when it is observed during 8% of all days.
Moderate rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around February 3, when it is observed during 5% 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 43% (comfortable) to 90% (very humid) over the course of a typical February, rarely dropping below 18% (dry) and reaching as high as 100% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 59% (mildly humid) three days out of four; it is most humid around February 5, rising above 85% (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 35°F (dry) to 54°F (very comfortable) and is rarely below 19°F (dry) or above 67°F (muggy).
Over the course of February typical wind speeds vary from 2 mph to 14 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around February 28, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around February 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).