Average Weather in September in Tocatlán Mexico
Daily high temperatures are around 68°F, rarely falling below 62°F or exceeding 72°F.
Daily low temperatures are around 49°F, rarely falling below 43°F or exceeding 54°F. The highest daily average low temperature is 50°F on September 13.
For reference, on May 4, the hottest day of the year, temperatures in Tocatlán typically range from 49°F to 74°F, while on January 12, the coldest day of the year, they range from 39°F to 65°F.
Average High and Low Temperature in September
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.
Average Hourly Temperature in September
The month of September in Tocatlán experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 85% throughout the month. The highest chance of overcast or mostly cloudy conditions is 88% on September 15.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 17% of the time.
For reference, on September 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 88%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover Categories in September
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Tocatlán, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 76% and ending it at 57%.
For reference, the year's highest daily chance of a wet day is 78% on July 4, and its lowest chance is 5% on December 13.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Tocatlán is rapidly decreasing, starting the month at 5.7 inches, when it rarely exceeds 8.7 inches or falls below 3.4 inches, and ending the month at 4.3 inches, when it rarely exceeds 6.7 inches or falls below 2.2 inches.
The highest average 31-day accumulation is 5.7 inches on September 4.
Average Monthly Rainfall in September
Over the course of September in Tocatlán, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 31 minutes, implying an average daily decrease of 1 minute, 5 seconds, and weekly decrease of 7 minutes, 36 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, 30 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Tocatlán is 7:16 AM on September 1 and the latest sunrise is 6 minutes later at 7:22 AM on September 30.
The latest sunset is 7:46 PM on September 1 and the earliest sunset is 26 minutes earlier at 7:20 PM on September 30.
Daylight saving time is observed in Tocatlán during 2021, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:54 AM and sets 13 hours, 18 minutes later, at 8:13 PM, while on December 21, the shortest day of the year, it rises at 7:01 AM and sets 10 hours, 58 minutes later, at 5:59 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
The figure below presents a compact representation of key lunar data for September 2021. 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.
Moon Rise, Set & Phases in September
The chance that a given day will be muggy in Tocatlán is essentially constant during September, remaining around 0% throughout.
Humidity Comfort Levels in September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Tocatlán is essentially constant during September, remaining within 0.2 miles per hour of 6.1 miles per hour throughout.
For reference, on September 29, the windiest day of the year, the daily average wind speed is 6.3 miles per hour, while on May 13, the calmest day of the year, the daily average wind speed is 5.0 miles per hour.
The highest daily average wind speed during September is 6.3 miles per hour on September 29.
Average Wind Speed in September
The wind direction in Tocatlán during September is predominantly out of the east from September 1 to September 25 and the north from September 25 to September 30.
Wind Direction in September
The growing season in Tocatlán typically lasts for 10 months (306 days), from around February 6 to around December 9, rarely starting after March 15, or ending before November 1.
The month of September in Tocatlán is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Tocatlán are increasing during September, increasing by 238°F, from 2,057°F to 2,295°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Tocatlán is essentially constant during September, remaining within 0.1 kWh of 5.8 kWh throughout.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Tocatlán are 19.389 deg latitude, -98.027 deg longitude, and 8,642 ft elevation.
The topography within 2 miles of Tocatlán contains significant variations in elevation, with a maximum elevation change of 604 feet and an average elevation above sea level of 8,298 feet. Within 10 miles contains significant variations in elevation (5,315 feet). Within 50 miles also contains extreme variations in elevation (16,444 feet).
The area within 2 miles of Tocatlán is covered by cropland (91%), within 10 miles by cropland (67%) and shrubs (14%), and within 50 miles by cropland (41%) and trees (23%).
This report illustrates the typical weather in Tocatlán, 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 Tocatlán.
For each station, the records are corrected for the elevation difference between that station and Tocatlán 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 Tocatlán is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tocatlán and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .