September Weather in San Pedro Coyutla Mexico

Daily high temperatures decrease by 3°F, from 89°F to 86°F, rarely falling below 80°F or exceeding 94°F.

Daily low temperatures decrease by 3°F, from 73°F to 70°F, rarely falling below 65°F or exceeding 75°F.

For reference, on May 21, the hottest day of the year, temperatures in San Pedro Coyutla typically range from 74°F to 95°F, while on January 7, the coldest day of the year, they range from 57°F to 76°F.

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

Concepción, Paraguay (4,141 miles away) and Luang Prabang, Laos (9,285 miles) are the far-away foreign places with temperatures most similar to San Pedro Coyutla (view comparison).

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The month of September in San Pedro Coyutla experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 74% to 68%. The highest chance of overcast or mostly cloudy conditions is 75% on September 15.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 32% of the time.

For reference, on September 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on March 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Pedro Coyutla, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 63% and ending it at 47%.

For reference, the year's highest daily chance of a wet day is 63% on September 1, and its lowest chance is 14% on March 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 September in San Pedro Coyutla is decreasing, starting the month at 8.6 inches, when it rarely exceeds 14.3 inches or falls below 3.8 inches, and ending the month at 7.8 inches, when it rarely exceeds 13.3 inches or falls below 3.1 inches.

The highest average 31-day accumulation is 9.2 inches on September 13.

Over the course of September in San Pedro Coyutla, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 35 minutes, implying an average daily decrease of 1 minute, 12 seconds, and weekly decrease of 8 minutes, 23 seconds.

The shortest day of the month is September 30, with 11 hours, 57 minutes of daylight and the longest day is September 1, with 12 hours, 32 minutes of daylight.

The earliest sunrise of the month in San Pedro Coyutla is 6:17 AM on September 1 and the latest sunrise is 7 minutes later at 6:24 AM on September 30.

The latest sunset is 6:49 PM on September 1 and the earliest sunset is 27 minutes earlier at 6:21 PM on September 30.

Daylight saving time is not observed in San Pedro Coyutla during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:52 AM and sets 13 hours, 26 minutes later, at 7:18 PM, while on December 21, the shortest day of the year, it rises at 7:06 AM and sets 10 hours, 51 minutes later, at 5:57 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 September 2024. 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 San Pedro Coyutla is rapidly decreasing during September, falling from 98% to 82% over the course of the month.

For reference, on July 4, the muggiest day of the year, there are muggy conditions 98% of the time, while on January 18, the least muggy day of the year, there are muggy conditions 3% 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 San Pedro Coyutla is essentially constant during September, remaining within 0.1 miles per hour of 5.3 miles per hour throughout.

For reference, on April 18, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on December 1, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

The highest daily average wind speed during September is 5.4 miles per hour on September 28.

The hourly average wind direction in San Pedro Coyutla throughout September is predominantly from the east, with a peak proportion of 54% on September 1.

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 San Pedro Coyutla 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 San Pedro Coyutla are rapidly increasing during September, increasing by 824°F, from 6,318°F to 7,142°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 San Pedro Coyutla is essentially constant during September, remaining within 0.1 kWh of 5.6 kWh throughout.

For the purposes of this report, the geographical coordinates of San Pedro Coyutla are 21.224 deg latitude, -98.430 deg longitude, and 597 ft elevation.

The topography within 2 miles of San Pedro Coyutla contains very significant variations in elevation, with a maximum elevation change of 1,181 feet and an average elevation above sea level of 758 feet. Within 10 miles contains very significant variations in elevation (2,077 feet). Within 50 miles contains large variations in elevation (9,570 feet).

The area within 2 miles of San Pedro Coyutla is covered by cropland (100%), within 10 miles by cropland (98%), and within 50 miles by cropland (77%) and trees (21%).