Average Weather In February For San José, Costa Rica

Location

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%).

Temperature

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.

Daily High and Low Temperature in February

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
Daily low temperatures are around 66°F, falling below 64°F or exceeding 70°F only one day in ten.

Fraction of Time Spent in Various Temperature Bands in February

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

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.

Daily Hours of Daylight and Twilight in February

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

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.

Daily Sunrise & Sunset with Twilight in February

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Clouds

The median cloud cover is 45% (partly cloudy) and does not vary substantially over the course of the month.

Median Cloud Cover in February

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

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.

Cloud Cover Types in February

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

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.

Probability of Precipitation at Some Point in the Day in February

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

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.

Types of Precipitation Throughout February

Relative frequency of various types of precipitation over the course of a typical February.

Snow

Either snow is exceptionally unlikely to fall at this location in February or this station does not reliably report precipitation types.

Humidity

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.

Relative Humidity in February

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

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.

Dew Point in February

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

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).

Wind Speed in February

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the east (26% of the time). The wind is least often out of the south (0% of the time), north (0% of the time), south west (1% of the time), north west (2% of the time), north east (3% of the time), and south east (5% of the time).

Wind Directions in February

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions in February

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.