Average Weather in San Martín Colombia
The climate in San Martín is hot, oppressive, and overcast. Over the course of the year, the temperature typically varies from 74°F to 95°F and is rarely below 70°F or above 101°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In San Martín, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in San Martín begins around December 9 and lasts for 3.3 months, ending around March 18. On January 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 32% of the time, and overcast or mostly cloudy 68% of the time.
The cloudier part of the year begins around March 18 and lasts for 8.7 months, ending around December 9. On May 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 94% of the time, and clear, mostly clear, or partly cloudy 6% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Martín varies significantly throughout the year.
The wetter season lasts 8.2 months, from March 30 to December 4, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 57% on October 5.
The drier season lasts 3.8 months, from December 4 to March 30. The smallest chance of a wet day is 13% on January 20.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 57% on October 5.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. San Martín experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in San Martín. The most rain falls during the 31 days centered around October 12, with an average total accumulation of 5.4 inches.
The least rain falls around January 13, with an average total accumulation of 1.0 inches.
Average Monthly Rainfall
The length of the day in San Martín does not vary substantially over the course of the year, staying within 35 minutes of 12 hours throughout. In 2017, the shortest day is December 21, with 11 hours, 40 minutes of daylight; the longest day is June 20, with 12 hours, 35 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:34 AM on May 26, and the latest sunrise is 39 minutes later at 6:14 AM on January 30. The earliest sunset is at 5:31 PM on November 14, and the latest sunset is 45 minutes later at 6:16 PM on July 13.
Daylight saving time (DST) is not observed in San Martín during 2017.
Sunrise & Sunset with Twilight
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
San Martín experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 10 months, from August 17 to June 26, during which time the comfort level is muggy, oppressive, or miserable at least 87% of the time. The muggiest day of the year is November 6, with muggy conditions 98% of the time.
The least muggy day of the year is July 27, with muggy conditions 83% of the time.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.The average hourly wind speed in San Martín does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 1.5 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in San Martín varies throughout the year.
The wind is most often from the north for 1.9 weeks, from October 19 to November 1, with a peak percentage of 41% on October 31. The wind is most often from the east for 12 months, from November 1 to October 19, with a peak percentage of 77% on January 1.
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.5 months, from January 8 to March 24, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is February 26, with an average of 5.9 kWh.
The darker period of the year lasts for 2.4 months, from September 22 to December 2, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest day of the year is October 20, with an average of 4.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of San Martín are 8.002 deg latitude, -73.511 deg longitude, and 335 ft elevation.
The topography within 2 miles of San Martín contains only modest variations in elevation, with a maximum elevation change of 180 feet and an average elevation above sea level of 337 feet. Within 10 miles contains only modest variations in elevation (4,318 feet). Within 50 miles also contains extreme variations in elevation (13,068 feet).
The area within 2 miles of San Martín is covered by trees (49%), grassland (20%), cropland (16%), and shrubs (14%), within 10 miles by trees (43%) and grassland (24%), and within 50 miles by trees (56%) and grassland (21%).
This report illustrates the typical weather in San Martín, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There is only a single weather station, Juan Vicente Gómez International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Martín.
At a distance of 119 kilometers from San Martín, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and San Martín according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.