Average Weather in Buenos Aires Mexico
In Buenos Aires, the summers are short, warm, arid, and mostly clear and the winters are long, cool, and partly cloudy. Over the course of the year, the temperature typically varies from 46°F to 79°F and is rarely below 40°F or above 87°F.
Based on the tourism score, the best time of year to visit Buenos Aires for warm-weather activities is from mid June to early October.
The warm season lasts for 2.8 months, from July 8 to October 1, with an average daily high temperature above 76°F. The hottest day of the year is August 25, with an average high of 79°F and low of 63°F.
The cool season lasts for 4.5 months, from November 28 to April 13, with an average daily high temperature below 68°F. The coldest day of the year is December 25, with an average low of 46°F and high of 65°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 Buenos Aires, 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 Buenos Aires begins around May 19 and lasts for 5.5 months, ending around November 2. On September 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 90% of the time, and overcast or mostly cloudy 10% of the time.
The cloudier part of the year begins around November 2 and lasts for 6.5 months, ending around May 19. On February 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Buenos Aires varies throughout the year.
The wetter season lasts 4.6 months, from November 20 to April 7, with a greater than 9% chance of a given day being a wet day. The chance of a wet day peaks at 19% on February 21.
The drier season lasts 7.4 months, from April 7 to November 20. The smallest chance of a wet day is 0% on June 26.
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 19% on February 21.
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. Buenos Aires experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 5.6 months, from October 28 to April 17, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 22, with an average total accumulation of 2.0 inches.
The rainless period of the year lasts for 6.4 months, from April 17 to October 28. The least rain falls around June 20, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Buenos Aires varies significantly over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 1 minute of daylight; the longest day is June 20, with 14 hours, 17 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:40 AM on June 11, and the latest sunrise is 1 hour, 30 minutes later at 7:09 AM on November 6. The earliest sunset is at 4:42 PM on December 4, and the latest sunset is 3 hours, 17 minutes later at 7:58 PM on June 29.
Daylight saving time (DST) is observed in Buenos Aires during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases
Buenos Aires experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.2 months, from June 30 to October 3, during which time the comfort level is muggy, oppressive, or miserable at least 4% of the time. The muggiest day of the year is August 22, with muggy conditions 16% of the time.
The least muggy day of the year is February 16, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Buenos Aires experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.4 months, from November 12 to May 25, with average wind speeds of more than 7.1 miles per hour. The windiest day of the year is December 30, with an average hourly wind speed of 8.3 miles per hour.
The calmer time of year lasts for 5.6 months, from May 25 to November 12. The calmest day of the year is September 8, with an average hourly wind speed of 5.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Buenos Aires varies throughout the year.
The wind is most often from the west for 9.6 months, from February 1 to November 20, with a peak percentage of 72% on May 23. The wind is most often from the east for 2.3 months, from November 20 to February 1, with a peak percentage of 42% on January 1.
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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.8 months, from July 15 to October 9, with an average temperature above 67°F. The day of the year with the warmest water is August 25, with an average temperature of 69°F.
The time of year with cooler water lasts for 4.3 months, from December 11 to April 21, with an average temperature below 61°F. The day of the year with the coolest water is February 8, with an average temperature of 59°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Buenos Aires throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Buenos Aires for general outdoor tourist activities is from mid June to early October, with a peak score in the third week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Buenos Aires for hot-weather activities is from early August to mid September, with a peak score in the last week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
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
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.8 months, from April 25 to August 18, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest day of the year is June 20, with an average of 8.4 kWh.
The darker period of the year lasts for 3.2 months, from November 6 to February 12, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is December 22, with an average of 3.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Buenos Aires are 32.423 deg latitude, -116.941 deg longitude, and 728 ft elevation.
The topography within 2 miles of Buenos Aires contains very significant variations in elevation, with a maximum elevation change of 1,017 feet and an average elevation above sea level of 790 feet. Within 10 miles contains very significant variations in elevation (2,871 feet). Within 50 miles contains large variations in elevation (6,483 feet).
The area within 2 miles of Buenos Aires is covered by grassland (72%), shrubs (14%), and artificial surfaces (11%), within 10 miles by shrubs (35%) and artificial surfaces (33%), and within 50 miles by water (44%) and shrubs (39%).
This report illustrates the typical weather in Buenos Aires, 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 2 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: General Abelardo L. Rodríguez International Airport (92%, 13 kilometers, north) and Campo (8%, 50 kilometers, northeast).
Time zones for airports and weather stations are provided by AskGeo.com .