April Weather in Oaxaca Mexico

Daily high temperatures are around 87°F, rarely falling below 80°F or exceeding 93°F. The highest daily average high temperature is 87°F on April 17.

Daily low temperatures increase by 3°F, from 56°F to 59°F, rarely falling below 51°F or exceeding 63°F.

For reference, on April 17, the hottest day of the year, temperatures in Oaxaca typically range from 58°F to 87°F, while on January 12, the coldest day of the year, they range from 47°F to 78°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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.

Lusaka, Zambia (8,809 miles away); Laela, Tanzania (8,956 miles); and Dek’emhāre, Eritrea (8,702 miles) are the far-away foreign places with temperatures most similar to Oaxaca (view comparison).

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The month of April in Oaxaca experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 37% to 53%.

The clearest day of the month is April 1, with clear, mostly clear, or partly cloudy conditions 63% of the time.

For reference, on June 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 92%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Oaxaca, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 9% and ending it at 21%.

For reference, the year's highest daily chance of a wet day is 71% on September 2, and its lowest chance is 4% on December 16.

Rainfall

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 April in Oaxaca is increasing, starting the month at 0.6 inches, when it rarely exceeds 1.6 inches, and ending the month at 1.5 inches, when it rarely exceeds 2.9 inches or falls below 0.1 inches.

Over the course of April in Oaxaca, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 26 minutes, implying an average daily increase of 54 seconds, and weekly increase of 6 minutes, 20 seconds.

The shortest day of the month is April 1, with 12 hours, 18 minutes of daylight and the longest day is April 30, with 12 hours, 45 minutes of daylight.

The earliest sunrise of the month in Oaxaca is 6:21 AM on April 1 and the latest sunrise is 59 minutes later at 7:20 AM on April 2.

The earliest sunset is 6:40 PM on April 1 and the latest sunset is 1 hour, 6 minutes later at 7:46 PM on April 30.

Daylight saving time (DST) starts at 3:00 AM on April 2, 2023, shifting sunrise and sunset to be an hour later.

For reference, on June 21, the longest day of the year, the Sun rises at 6:54 AM and sets 13 hours, 9 minutes later, at 8:03 PM, while on December 22, the shortest day of the year, it rises at 6:52 AM and sets 11 hours, 7 minutes later, at 5:58 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for April 2023. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 Oaxaca is essentially constant during April, remaining around 0% throughout.

For reference, on September 24, the muggiest day of the year, there are muggy conditions 1% of the time, while on December 19, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Oaxaca is essentially constant during April, remaining within 0.2 miles per hour of 5.5 miles per hour throughout.

For reference, on November 8, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on May 15, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

The wind direction in Oaxaca during April is predominantly out of the north from April 1 to April 24 and the east from April 24 to April 30.

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 Oaxaca 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.

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 Oaxaca are rapidly increasing during April, increasing by 626°F, from 1,462°F to 2,088°F, over the course of the month.

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 Oaxaca is essentially constant during April, remaining within 0.2 kWh of 7.0 kWh throughout.

For the purposes of this report, the geographical coordinates of Oaxaca are 17.065 deg latitude, -96.724 deg longitude, and 5,141 ft elevation.

The topography within 2 miles of Oaxaca contains very significant variations in elevation, with a maximum elevation change of 955 feet and an average elevation above sea level of 5,181 feet. Within 10 miles contains very significant variations in elevation (5,902 feet). Within 50 miles also contains extreme variations in elevation (10,538 feet).

The area within 2 miles of Oaxaca is covered by artificial surfaces (90%), within 10 miles by shrubs (29%) and cropland (26%), and within 50 miles by trees (49%) and shrubs (32%).