September Weather in Chigmecatitlán Mexico

Daily high temperatures are around 81°F, rarely falling below 76°F or exceeding 85°F.

Daily low temperatures are around 60°F, rarely falling below 54°F or exceeding 64°F. The highest daily average low temperature is 60°F on September 12.

For reference, on May 3, the hottest day of the year, temperatures in Chigmecatitlán typically range from 60°F to 87°F, while on January 12, the coldest day of the year, they range from 49°F to 77°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.

Bulawayo, Zimbabwe (8,984 miles away); Lusaka, Zambia (8,908 miles); and Igurusi, Tanzania (9,160 miles) are the far-away foreign places with temperatures most similar to Chigmecatitlán (view comparison).

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The month of September in Chigmecatitlán experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 83% throughout the month. The highest chance of overcast or mostly cloudy conditions is 86% on September 14.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 20% of the time.

For reference, on September 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 86%, while on February 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Chigmecatitlán, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 71% and ending it at 52%.

For reference, the year's highest daily chance of a wet day is 72% on August 26, and its lowest chance is 2% on December 13.

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 Chigmecatitlán is very rapidly decreasing, starting the month at 6.2 inches, when it rarely exceeds 9.6 inches or falls below 3.3 inches, and ending the month at 4.2 inches, when it rarely exceeds 7.5 inches or falls below 1.8 inches.

The highest average 31-day accumulation is 6.2 inches on September 2.

Over the course of September in Chigmecatitlán, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 30 minutes, implying an average daily decrease of 1 minute, 2 seconds, and weekly decrease of 7 minutes, 17 seconds.

The shortest day of the month is September 30, with 11 hours, 58 minutes of daylight and the longest day is September 1, with 12 hours, 28 minutes of daylight.

The earliest sunrise of the month in Chigmecatitlán is 6:17 AM on September 1 and the latest sunrise is 5 minutes later at 6:22 AM on September 30.

The latest sunset is 6:46 PM on September 1 and the earliest sunset is 25 minutes earlier at 6:21 PM on September 30.

Daylight saving time is not observed in Chigmecatitlán during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:56 AM and sets 13 hours, 15 minutes later, at 7:11 PM, while on December 21, the shortest day of the year, it rises at 7:00 AM and sets 11 hours, 1 minute later, at 6:01 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 Chigmecatitlán is essentially constant during September, remaining around 1% throughout.

For reference, on June 14, the muggiest day of the year, there are muggy conditions 1% of the time, while on January 1, 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 Chigmecatitlán is essentially constant during September, remaining within 0.2 miles per hour of 6.4 miles per hour throughout.

For reference, on July 21, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on May 27, the calmest day of the year, the daily average wind speed is 5.5 miles per hour.

The lowest daily average wind speed during September is 6.3 miles per hour on September 14.

The hourly average wind direction in Chigmecatitlán throughout September is predominantly from the east, with a peak proportion of 72% 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 Chigmecatitlán 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 Chigmecatitlán are rapidly increasing during September, increasing by 562°F, from 4,640°F to 5,202°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 Chigmecatitlán is essentially constant during September, remaining within 0.1 kWh of 6.1 kWh throughout.

For the purposes of this report, the geographical coordinates of Chigmecatitlán are 18.646 deg latitude, -98.072 deg longitude, and 5,000 ft elevation.

The topography within 2 miles of Chigmecatitlán contains very significant variations in elevation, with a maximum elevation change of 1,132 feet and an average elevation above sea level of 4,783 feet. Within 10 miles contains very significant variations in elevation (4,134 feet). Within 50 miles also contains extreme variations in elevation (15,194 feet).

The area within 2 miles of Chigmecatitlán is covered by cropland (70%) and grassland (10%), within 10 miles by cropland (39%) and trees (29%), and within 50 miles by cropland (35%) and trees (25%).