Average Weather in Buenos Aires Mexico
In Buenos Aires, the wet season is muggy and overcast, the dry season is partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 58°F to 99°F and is rarely below 53°F or above 103°F.
Based on the tourism score, the best time of year to visit Buenos Aires for warm-weather activities is from mid November to late April.
The hot season lasts for 1.8 months, from April 1 to May 28, with an average daily high temperature above 97°F. The hottest day of the year is May 5, with an average high of 99°F and low of 69°F.
The cool season lasts for 3.0 months, from November 5 to February 6, with an average daily high temperature below 90°F. The coldest day of the year is January 8, with an average low of 58°F and high of 88°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 extreme seasonal variation over the course of the year.
The clearer part of the year in Buenos Aires begins around October 29 and lasts for 7.2 months, ending around June 5. On February 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
The cloudier part of the year begins around June 5 and lasts for 4.7 months, ending around October 29. On September 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 92% of the time, and clear, mostly clear, or partly cloudy 8% 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 very significantly throughout the year.
The wetter season lasts 4.1 months, from June 6 to October 9, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 70% on August 20.
The drier season lasts 7.9 months, from October 9 to June 6. The smallest chance of a wet day is 1% on April 2.
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 70% on August 20.
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 extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.9 months, from May 9 to February 6, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 27, with an average total accumulation of 6.0 inches.
The rainless period of the year lasts for 3.1 months, from February 6 to May 9. The least rain falls around April 10, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The length of the day in Buenos Aires varies over the course of the year. In 2020, the shortest day is December 21, with 10 hours, 59 minutes of daylight; the longest day is June 20, with 13 hours, 17 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:39 AM on April 4, and the latest sunrise is 1 hour, 6 minutes later at 7:46 AM on October 24. The earliest sunset is at 6:09 PM on November 24, and the latest sunset is 2 hours, 21 minutes later at 8:30 PM on July 5.
Daylight saving time (DST) is observed in Buenos Aires during 2020, starting in the spring on April 5, lasting 6.6 months, and ending in the fall on October 25.
Sunrise & Sunset with Twilight and Daylight Saving Time
Buenos Aires experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.6 months, from May 22 to November 9, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The muggiest day of the year is September 2, with muggy conditions 87% of the time.
The least muggy day of the year is January 26, 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 3.9 months, from February 29 to June 24, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is May 20, with an average hourly wind speed of 5.9 miles per hour.
The calmer time of year lasts for 8.1 months, from June 24 to February 29. The calmest day of the year is November 3, with an average hourly wind speed of 4.2 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 north for 6.0 days, from December 19 to December 25, with a peak percentage of 35% on December 22. The wind is most often from the south for 12 months, from December 25 to December 19, with a peak percentage of 34% on January 1.
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 November to late April, with a peak score in the third week of February.
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 April to early June, with a peak score in the second week of May.
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 some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.4 months, from March 10 to May 24, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is April 18, with an average of 7.3 kWh.
The darker period of the year lasts for 7.0 months, from June 24 to January 23, with an average daily incident shortwave energy per square meter below 5.1 kWh. The darkest day of the year is December 21, with an average of 4.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Buenos Aires are 19.075 deg latitude, -102.180 deg longitude, and 1,568 ft elevation.
The topography within 2 miles of Buenos Aires contains significant variations in elevation, with a maximum elevation change of 787 feet and an average elevation above sea level of 1,589 feet. Within 10 miles contains significant variations in elevation (4,081 feet). Within 50 miles also contains extreme variations in elevation (12,077 feet).
The area within 2 miles of Buenos Aires is covered by cropland (73%) and trees (27%), within 10 miles by cropland (73%) and trees (26%), and within 50 miles by trees (54%) and cropland (31%).
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 Francisco J. Mujica International Airport (54%, 149 kilometers, northeast) and Guadalajara International Airport (46%, 200 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .