This report describes the typical weather at the Tobías Bolaños International Airport (San José, Costa Rica) weather station over the course of an average February. It is based on the historical records from 2002 to 2012. Earlier records are either unavailable or unreliable.
San José has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by forests (66%), croplands (28%), and grasslands (5%).
The month of February is characterized by essentially constant daily high temperatures, with daily highs around 79°F throughout the month, exceeding 84°F or dropping below 75°F only one day in ten.
Over the course of February, the length of the day is essentially constant. The shortest day of the month is February 3 with 11:43 hours of daylight; the longest day is February 28 with 11:56 hours of daylight.
The earliest sunrise is at 5:51am on February 29; the latest sunset is at 5:47pm on February 28; the latest sunrise is at 5:59am on February 4; the earliest sunset is at 5:42pm on February 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 45% (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 17% of the time, partly cloudy 15% of the time, and mostly cloudy or overcast 10% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around February 27, occurring in 16% of days. Precipitation is least likely around February 7, occurring in 11% of days.
Throughout February, the most common forms of precipitation are moderate rain, light rain, drizzle, and thunderstorms.
Moderate rain is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around February 26, when it is observed during 6% of all days.
Light rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around February 28, when it is observed during 4% of all days.
Drizzle is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around February 6, when it is observed during 3% of all days.
Thunderstorms are the most severe precipitation observed during 16% of those days with precipitation. They are most likely around February 26, when it is observed during 3% 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 48% (comfortable) to 78% (humid) over the course of a typical February, rarely dropping below 39% (comfortable), or exceeding 91% (very humid).
The air is driest around February 26, at which time the relative humidity drops below 53% (mildly humid) three days out of four; it is most humid around February 29, rising above 72% (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 55°F (very comfortable) to 62°F (mildy humid) and is rarely below 51°F (very comfortable) or above 66°F (muggy).
The time of the month between February 1 and February 29 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of February typical wind speeds vary from 11 mph to 21 mph (gentle breeze to fresh breeze), rarely exceeding 26 mph (strong breeze).
The highest average wind speed of 16 mph (moderate breeze) occurs around February 27, at which time the average daily maximum wind speed is 20 mph (fresh breeze).
The lowest average wind speed of 11 mph (gentle breeze) occurs around February 1, at which time the average daily maximum wind speed is 20 mph (fresh breeze).