Cuernavaca Weather

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Cuernavaca Baranca

The Barancas (Ravines)

Cuernavaca is well-known worldwide for its mild, semi-tropical weather. The water flows through many barancas (as seen above) as it makes it way from the mountain top to the rich valleys below. The barancas keep the city cool as well as helping to maintain the moisture level for the rich and colorful flora throughout the city.

Climate Data for Cuernavaca Mexico

Cuernavaca Weather

Average Weather in Cuernavaca Mexico

In Cuernavaca, the wet season (mid May to mid October) is overcast, the dry season (mid October to mid May) is partly cloudy, and it is warm year round. Over the course of the year, the temperature typically varies from 54°F to 86.2°F and is rarely below 44°F or above 93°F.

Average High and Low Cuernavaca
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

Average Hourly 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.

Avg Hourly Temp in Cuernavaca
The average hourly temperature, color coded into bands: cold <55°F, cool <65°F, comfortable <75°F, warm 85°F >, hot 95°F >. The shaded overlays indicate night and civil twilight.

Clouds

In Cuernavaca, 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 Cuernavaca begins around October 31 and lasts for 6.8 months, ending around May 24. On February 25, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.

The cloudier part of the year begins around May 24 and lasts for 5.2 months, ending around October 31. 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 11% of the time.

Cloud Cover
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Cuernavaca varies very significantly throughout the year.

The wetter season lasts 4.4 months, from May 28 to October 9, with a greater than 40% chance of a given day being a wet day. The chance of a wet day peaks at 79% on August 27.

The drier season lasts 7.6 months, 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 August 27.

Daily Change of Precipitation
The percentage of days in which various types of precipitation are observed, excluding trace quantities.

Rainfall

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. Cuernavaca experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.4 months, from April 26 to November 9, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 1, with an average total accumulation of 6.0 inches.

The rainless period of the year lasts for 5.6 months, from November 9 to April 26. The least rain falls around December 11, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands.

Sun

The length of the day in Cuernavaca varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 60 minutes of daylight; the longest day is June 21, with 13 hours, 16 minutes of daylight.

Hours of Daylight and Twilight
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:30 AM on April 1, and the latest sunrise is 1 hour, 5 minutes later at 7:35 AM on October 28. The earliest sunset is at 5:57 PM on November 24, and the latest sunset is 2 hours, 21 minutes later at 8:18 PM on July 4.

Daylight saving time (DST) is observed in Cuernavaca during 2017, starting in the spring on April 2, lasting 6.8 months, and ending in the fall on October 29.

Sunrise and Sunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the ‘DST’ labels.

Humidity

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 Cuernavaca, 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
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Cuernavaca does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 2.6 miles per hour throughout.

Average Wind Speed
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The predominant average hourly wind direction in Cuernavaca varies throughout the year.
The wind is most often from the south for 6.1 months, from January 5 to July 8, with a peak percentage of 49% on June 2. The wind is most often from the east for 2.7 months, from July 8 to September 30, with a peak percentage of 44% on July 22. The wind is most often from the north for 3.2 months, from September 30 to January 5, with a peak percentage of 30% on January 1.
Wind Direction
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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.

Average Daily Incident Shortwave Solar Energy
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 2.5 months, from March 5 to May 20, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is April 1, with an average of 7.2 kWh.

The darker period of the year lasts for 2.5 months, from November 8 to January 24, with an average daily incident shortwave energy per square meter below 5.4 kWh. The darkest day of the year is December 22, with an average of 5.0 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Cuernavaca are 18.926 deg latitude, -99.231 deg longitude, and 5,085 ft elevation.

The topography within 2 miles of Cuernavaca contains very significant variations in elevation, with a maximum elevation change of 942 feet and an average elevation above sea level of 5,070 feet. Within 10 miles contains very significant variations in elevation (7,631 feet). Within 50 miles also contains extreme variations in elevation (15,568 feet).

The area within 2 miles of Cuernavaca is covered by artificial surfaces (76%) and cropland (21%), within 10 miles by trees (42%) and cropland (35%), and within 50 miles by cropland (37%) and trees (37%).

Data Sources

This report illustrates the typical weather in Cuernavaca, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in central Cuernavaca.

Note: Since Cuernavaca is located on a hillside, those in the north of Cuernavaca will experience temperatures slightly lower than average and those in the south will experience temperatures slightly higher. For those vacationing in Cuernavaca, you can decide which part of the city to stay depending on your preference for warmer or cooler. You can expect 5 to 10˚F difference between the north and south of the downtown.

For each station, the records are corrected for the elevation difference between that station and the center of Cuernavaca 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 Cuernavaca is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Cuernavaca and a given station.

The stations contributing to this reconstruction are: Licenciado Adolfo López Mateos International Airport – Cuernavaca (28%, 58 kilometers, northwest); Benito Juárez International Airport – Mexico City (43%, 59 kilometers, north); and Hermanos Serdán International Airport – Puebla (29%, 94 kilometers, east).

Other Data

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.

 

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G. William Hood is a writer, fine arts painter, educator and world traveler. He lives in Cuernavaca with his pet cockatiel, Pepe.