Average Weather in Mexico City Mexico
Mexico City has a cold semi-arid steppe climate. The temperature typically varies from 43°F to 80°F over the course of the year, and is rarely below 37°F or above 86°F.
The warm season lasts for 79 days, from March 22 to June 9, with an average daily high temperature above 78°F. The hottest day of the year is May 9, with an average high of 80°F and low of 55°F.
The cool season lasts for 77 days, from November 18 to February 3, with an average daily high temperature below 72°F. The coldest day of the year is January 13, with an average low of 43°F and high of 71°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
The length of the day in Mexico City varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 58 minutes of daylight; the longest day is June 21, with 13 hours, 18 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:30 AM on April 1, and the latest sunrise is 1 hour, 6 minutes later at 7:35 AM on October 28. The earliest sunset is at 5:56 PM on November 25, and the latest sunset is 2 hours, 23 minutes later at 8:19 PM on July 4.
Daylight saving time (DST) is observed in Mexico City during 2017, starting in the spring on April 2, lasting 209 days, and ending in the fall on October 29.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Mexico City, 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 Mexico City begins around October 30 and lasts for 213 days, ending around May 31. On February 24, 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 May 31 and lasts for 152 days, ending around October 30. On September 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 89% of the time, and clear, mostly clear, or partly cloudy 10% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Mexico City varies very significantly throughout the year.
The wetter season lasts 134 days, from May 28 to October 9, with a greater than 41% chance of a given day being a wet day. The chance of a wet day peaks at 79% on July 3.
The drier season lasts 231 days, from October 9 to May 28. The smallest chance of a wet day is 2% on December 8.
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 July 3.
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 in the year. Mexico City experiences very significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 211 days, from April 14 to November 11, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 2, with an average total accumulation of 5.4 inches.
The rainless period of the year lasts for 154 days, from November 11 to April 14. The least rain falls around December 12, with and average total accumulation of 0.1 inches.
Average Monthly Rainfall
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 perceived humidity level in Mexico City, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
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 Mexico City does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 2.5 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Mexico City varies throughout the year.
The wind is most often from the south for 5 days, from March 5 to March 10; for 71 days, from March 12 to May 22; and for 76 days, from December 8 to February 22, with a peak percentage of 39% on April 2. The wind is most often from the north for 11 days, from May 22 to June 2 and for 68 days, from October 1 to December 8, with a peak percentage of 46% on October 29. The wind is most often from the east for 121 days, from June 2 to October 1, with a peak percentage of 70% on July 24.
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 87 days, from March 7 to June 2, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is April 19, with an average of 7.3 kWh.
The darker period of the year lasts for 78 days, from November 8 to January 25, with an average daily incident shortwave energy per square meter below 5.5 kWh. The darkest day of the year is December 22, with an average of 5.0 kWh.
Average Daily Incident Shortwave Solar Energy
The area within 2 miles of Mexico City is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (87%), and within 50 miles by cropland (39%) and trees (25%).
The topography within 2 miles of Mexico City contains only modest variations in elevation, with a maximum elevation change of 105 feet, and an average elevation above sea level of 7,344 feet. Within 10 miles contains very significant variations in elevation (1,726 feet). Within 50 miles contains extreme variations in elevation (14,606 feet).
This report illustrates the typical weather in Mexico City, 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 Mexico City.
For each station, the records are are corrected for the elevation difference between that station and Mexico City 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 Mexico City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mexico City and a given station.
The stations contributing to this reconstruction are: Benito Juárez International Airport (97%, 5.9 kilometers, east) and Licenciado Adolfo López Mateos International Airport (3.2%, 47 kilometers, west).
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 .