Average Weather in September in Apaseo el Alto Mexico
Daily high temperatures are around 78°F, rarely falling below 73°F or exceeding 82°F.
Daily low temperatures decrease by 2°F, from 57°F to 54°F, rarely falling below 49°F or exceeding 59°F.
For reference, on May 11, the hottest day of the year, temperatures in Apaseo el Alto typically range from 56°F to 85°F, while on January 7, the coldest day of the year, they range from 42°F to 72°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 Apaseo el Alto experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 82% to 78%. The highest chance of overcast or mostly cloudy conditions is 83% on September 15.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 22% of the time.
For reference, on September 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 83%, while on February 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.
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 Apaseo el Alto, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 54% and ending it at 33%.
For reference, the year's highest daily chance of a wet day is 66% on July 15, and its lowest chance is 2% on December 13.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Apaseo el Alto is rapidly decreasing, starting the month at 4.1 inches, when it rarely exceeds 6.5 inches or falls below 1.8 inches, and ending the month at 2.2 inches, when it rarely exceeds 4.2 inches or falls below 0.7 inches.
Average Monthly Rainfall in September
Over the course of September in Apaseo el Alto, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 33 minutes, implying an average daily decrease of 1 minute, 9 seconds, and weekly decrease of 8 minutes, 3 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, 31 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Apaseo el Alto is 7:26 AM on September 1 and the latest sunrise is 7 minutes later at 7:33 AM on September 30.
The latest sunset is 7:57 PM on September 1 and the earliest sunset is 27 minutes earlier at 7:31 PM on September 30.
Daylight saving time is observed in Apaseo el Alto during 2018, 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 7:03 AM and sets 13 hours, 22 minutes later, at 8:25 PM, while on December 21, the shortest day of the year, it rises at 7:13 AM and sets 10 hours, 54 minutes later, at 6:07 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
The chance that a given day will be muggy in Apaseo el Alto is essentially constant during September, remaining around 0% throughout.
For reference, on July 31, 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 Apaseo el Alto is essentially constant during September, remaining within 0.1 miles per hour of 7.6 miles per hour throughout.
For reference, on September 25, the windiest day of the year, the daily average wind speed is 7.7 miles per hour, while on December 22, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.
The highest daily average wind speed during September is 7.7 miles per hour on September 25.
Average Wind Speed in September
Wind Direction in September
While it does not do so every year, freezing temperatures are seen in Apaseo el Alto over some winters. The day least likely to be in the growing season is January 2, with a 71% chance.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Apaseo el Alto are rapidly increasing during September, increasing by 450°F, from 3,780°F to 4,230°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Apaseo el Alto 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 Apaseo el Alto are 20.458 deg latitude, -100.621 deg longitude, and 6,289 ft elevation.
The topography within 2 miles of Apaseo el Alto contains very significant variations in elevation, with a maximum elevation change of 1,102 feet and an average elevation above sea level of 6,248 feet. Within 10 miles contains very significant variations in elevation (2,595 feet). Within 50 miles contains large variations in elevation (6,322 feet).
The area within 2 miles of Apaseo el Alto is covered by shrubs (56%), artificial surfaces (18%), and cropland (17%), within 10 miles by trees (33%) and shrubs (26%), and within 50 miles by trees (28%) and cropland (26%).
This report illustrates the typical weather in Apaseo el Alto year round, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Apaseo el Alto.
For each station, the records are corrected for the elevation difference between that station and Apaseo el Alto 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 Apaseo el Alto is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Apaseo el Alto and a given station.
The stations contributing to this reconstruction are: Querétaro Intercontinental Airport (56%, 49 kilometers, east); General Francisco J. Mujica International Airport (27%, 80 kilometers, southwest); and Del Bajío International Airport (17%, 107 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .