Average Weather in July in Buenos Aires Argentina
Daily high temperatures are around 58°F, rarely falling below 50°F or exceeding 66°F. The lowest daily average high temperature is 57°F on July 19.
Daily low temperatures are around 47°F, rarely falling below 38°F or exceeding 56°F. The lowest daily average low temperature is 47°F on July 19.
For reference, on January 14, the hottest day of the year, temperatures in Buenos Aires typically range from 70°F to 83°F, while on July 18, the coldest day of the year, they range from 47°F to 57°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, 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 July
The month of July in Buenos Aires experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the month.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 53% of the time.
For reference, on June 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on January 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Buenos Aires, the chance of a wet day over the course of July is essentially constant, remaining around 18% throughout.
For reference, the year's highest daily chance of a wet day is 36% on February 8, and its lowest chance is 17% on August 12.
Probability of Precipitation in July
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during July in Buenos Aires is essentially constant, remaining about 2.1 inches throughout, and rarely exceeding 4.1 inches or falling below 0.4 inches.
Average Monthly Rainfall in July
Over the course of July in Buenos Aires, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 32 minutes, implying an average daily increase of 1 minute, 3 seconds, and weekly increase of 7 minutes, 23 seconds.
The shortest day of the month is July 1, with 9 hours, 52 minutes of daylight and the longest day is July 31, with 10 hours, 24 minutes of daylight.
Hours of Daylight and Twilight in July
The latest sunrise of the month in Buenos Aires is 8:01 AM on July 1 and the earliest sunrise is 13 minutes earlier at 7:48 AM on July 31.
The earliest sunset is 5:53 PM on July 1 and the latest sunset is 18 minutes later at 6:12 PM on July 31.
Daylight saving time is not observed in Buenos Aires during 2018.
For reference, on December 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 29 minutes later, at 8:06 PM, while on June 21, the shortest day of the year, it rises at 8:00 AM and sets 9 hours, 50 minutes later, at 5:50 PM.
Sunrise & Sunset with Twilight in July
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.
The chance that a given day will be muggy in Buenos Aires is essentially constant during July, remaining around 0% throughout.
For reference, on February 7, the muggiest day of the year, there are muggy conditions 51% of the time, while on July 18, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
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 Buenos Aires is essentially constant during July, remaining within 0.1 miles per hour of 10.8 miles per hour throughout.
For reference, on September 13, the windiest day of the year, the daily average wind speed is 11.5 miles per hour, while on May 6, the calmest day of the year, the daily average wind speed is 10.0 miles per hour.
Average Wind Speed in July
Wind Direction in July
Buenos Aires is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Buenos Aires is essentially constant during July, remaining around 55°F throughout.
The lowest average surface water temperature during July is 54°F on July 25.
Average Water Temperature in July
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures in Buenos Aires are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in July
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Buenos Aires are gradually increasing during July, increasing by 111°F, from 0°F to 111°F, over the course of the month.
Growing Degree Days in July
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 in Buenos Aires is gradually increasing during July, rising by 0.6 kWh, from 2.5 kWh to 3.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Buenos Aires are -34.613 deg latitude, -58.377 deg longitude, and 36 ft elevation.
The topography within 2 miles of Buenos Aires contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 72 feet. Within 10 miles also contains only modest variations in elevation (243 feet). Within 50 miles also contains only modest variations in elevation (482 feet).
The area within 2 miles of Buenos Aires is covered by artificial surfaces (47%), trees (14%), water (12%), and grassland (11%), within 10 miles by water (47%) and artificial surfaces (38%), and within 50 miles by cropland (29%) and water (28%).
This report illustrates the typical weather in Buenos Aires year round, 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 are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Buenos Aires.
For each station, the records are corrected for the elevation difference between that station and Buenos Aires according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Buenos Aires is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Buenos Aires and a given station.
The stations contributing to this reconstruction are: Jorge Newbery Airport (83%, 7 kilometers, northwest); Buenos Aires - Ministro Pistarini International Airport (11%, 27 kilometers, southwest); Colonia del Sacramento International Airport (3.5%, 58 kilometers, east); and La Plata Airport (3.3%, 59 kilometers, southeast).
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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.