Average Weather in September in San Juan Tejaluca Mexico
Daily high temperatures are around 77°F, rarely falling below 72°F or exceeding 82°F. The lowest daily average high temperature is 77°F on September 19.
Daily low temperatures are around 57°F, rarely falling below 52°F or exceeding 61°F. The highest daily average low temperature is 57°F on September 13.
For reference, on May 3, the hottest day of the year, temperatures in San Juan Tejaluca typically range from 57°F to 83°F, while on January 12, the coldest day of the year, they range from 46°F to 74°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
Harare, Zimbabwe (9,143 miles away); Ibb, Yemen (9,035 miles); and Soavinandriana, Madagascar (10,175 miles) are the far-away foreign places with temperatures most similar to San Juan Tejaluca (view comparison).
The month of September in San Juan Tejaluca 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 87% on September 15.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 18% of the time.
For reference, on September 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 87%, while on February 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.
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 San Juan Tejaluca, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 72% and ending it at 53%.
For reference, the year's highest daily chance of a wet day is 74% on June 26, and its lowest chance is 2% on December 13.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in San Juan Tejaluca is rapidly decreasing, starting the month at 5.8 inches, when it rarely exceeds 8.9 inches or falls below 3.4 inches, and ending the month at 4.0 inches, when it rarely exceeds 6.7 inches or falls below 1.8 inches.
The highest average 31-day accumulation is 5.8 inches on September 3.
Average Monthly Rainfall in September
Over the course of September in San Juan Tejaluca, 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, 3 seconds, and weekly decrease of 7 minutes, 23 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, 29 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in San Juan Tejaluca is 7:18 AM on September 1 and the latest sunrise is 5 minutes later at 7:24 AM on September 30.
The latest sunset is 7:47 PM on September 1 and the earliest sunset is 25 minutes earlier at 7:22 PM on September 30.
Daylight saving time is observed in San Juan Tejaluca 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 6:57 AM and sets 13 hours, 16 minutes later, at 8:13 PM, while on December 21, the shortest day of the year, it rises at 7:02 AM and sets 11 hours, 0 minutes later, at 6:01 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 San Juan Tejaluca is essentially constant during September, remaining around 0% throughout.
For reference, on September 22, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
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 San Juan Tejaluca is essentially constant during September, remaining within 0.1 miles per hour of 5.7 miles per hour throughout.
For reference, on March 9, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on May 28, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.
The lowest daily average wind speed during September is 5.6 miles per hour on September 12.
Average Wind Speed in September
The hourly average wind direction in San Juan Tejaluca throughout September is predominantly from the east, with a peak proportion of 54% on September 1.
Wind Direction in September
Temperatures in San Juan Tejaluca 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.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in San Juan Tejaluca are rapidly increasing during September, increasing by 472°F, from 3,917°F to 4,388°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in San Juan Tejaluca is essentially constant during September, remaining within 0.1 kWh of 6.0 kWh throughout.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of San Juan Tejaluca are 18.899 deg latitude, -98.405 deg longitude, and 5,981 ft elevation.
The topography within 2 miles of San Juan Tejaluca contains significant variations in elevation, with a maximum elevation change of 673 feet and an average elevation above sea level of 5,979 feet. Within 10 miles contains significant variations in elevation (3,356 feet). Within 50 miles also contains extreme variations in elevation (15,082 feet).
The area within 2 miles of San Juan Tejaluca is covered by cropland (87%) and artificial surfaces (12%), within 10 miles by cropland (66%) and shrubs (19%), and within 50 miles by cropland (45%) and trees (26%).
This report illustrates the typical weather in San Juan Tejaluca, 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 is only a single weather station, Hermanos Serdán International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Juan Tejaluca.
At a distance of 29 kilometers from San Juan Tejaluca, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and San Juan Tejaluca according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
Time zones for airports and weather stations are provided by AskGeo.com .