Average Weather at Brasilia International Airport Brazil
At Brasilia International Airport, the wet season is overcast, the dry season is mostly clear, and it is warm year round. Over the course of the year, the temperature typically varies from 54°F to 85°F and is rarely below 49°F or above 91°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
At Brasilia International Airport, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year at Brasilia International Airport begins around April 18 and lasts for 5.7 months, ending around October 9. On July 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 76% of the time, and overcast or mostly cloudy 24% of the time.
The cloudier part of the year begins around October 9 and lasts for 6.3 months, ending around April 18. On December 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 87% of the time, and clear, mostly clear, or partly cloudy 13% 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 at Brasilia International Airport varies very significantly throughout the year.
The wetter season lasts 6.1 months, from October 10 to April 13, with a greater than 41% chance of a given day being a wet day. The chance of a wet day peaks at 79% on December 6.
The drier season lasts 5.9 months, from April 13 to October 10. The smallest chance of a wet day is 1% on July 28.
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 79% on December 6.
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. Brasilia International Airport experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.2 months, from August 22 to May 28, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 16, with an average total accumulation of 8.7 inches.
The rainless period of the year lasts for 2.8 months, from May 28 to August 22. The least rain falls around July 17, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The length of the day at Brasilia International Airport varies over the course of the year. In 2017, the shortest day is June 21, with 11 hours, 11 minutes of daylight; the longest day is December 21, with 13 hours, 5 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:44 AM on October 14, and the latest sunrise is 1 hour, 24 minutes later at 7:08 AM on February 18. The earliest sunset is at 5:46 PM on June 1, and the latest sunset is 2 hours, 3 minutes later at 7:50 PM on January 19.
Daylight saving time (DST) is observed at Brasilia International Airport during 2017, starting in the spring on October 15 and ending in the fall on February 18.
Sunrise & Sunset with Twilight and Daylight Saving Time
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.
Brasilia International Airport experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.4 months, from October 17 to April 30, during which time the comfort level is muggy, oppressive, or miserable at least 9% of the time. The muggiest day of the year is March 14, with muggy conditions 36% of the time.
The least muggy day of the year is August 4, when muggy conditions are essentially unheard of.
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 at Brasilia International Airport experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.9 months, from June 12 to October 8, with average wind speeds of more than 3.8 miles per hour. The windiest day of the year is August 28, with an average hourly wind speed of 4.6 miles per hour.
The calmer time of year lasts for 8.1 months, from October 8 to June 12. The calmest day of the year is March 12, with an average hourly wind speed of 3.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Brasilia International Airport varies throughout the year.
The wind is most often from the east for 10 months, from January 14 to November 22, with a peak percentage of 87% on August 10. The wind is most often from the north for 1.7 months, from November 22 to January 14, with a peak percentage of 38% 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 2.1 months, from August 23 to October 25, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is September 13, with an average of 6.4 kWh.
The darker period of the year lasts for 2.1 months, from May 13 to July 15, with an average daily incident shortwave energy per square meter below 5.4 kWh. The darkest day of the year is June 8, with an average of 5.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Brasilia International Airport are -15.871 deg latitude, -47.919 deg longitude, and 3,442 ft elevation.
The topography within 2 miles of Brasilia International Airport contains only modest variations in elevation, with a maximum elevation change of 299 feet and an average elevation above sea level of 3,425 feet. Within 10 miles contains only modest variations in elevation (1,191 feet). Within 50 miles contains very significant variations in elevation (2,428 feet).
The area within 2 miles of Brasilia International Airport is covered by shrubs (61%), trees (18%), and grassland (15%), within 10 miles by shrubs (38%) and trees (21%), and within 50 miles by shrubs (31%) and trees (29%).
This report illustrates the typical weather at Brasilia International Airport, 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
Brasilia International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
In this case, the only station close and reliable enough to use as a fallback is Anapolis AFB.
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.