Fall Weather in San Ildefonso Mexico
Daily high temperatures are around 69°F, rarely falling below 63°F or exceeding 74°F.
Daily low temperatures decrease by 14°F, from 51°F to 37°F, rarely falling below 31°F or exceeding 54°F. The highest daily average low temperature is 51°F on September 3.
For reference, on May 10, the hottest day of the year, temperatures in San Ildefonso typically range from 47°F to 75°F, while on January 8, the coldest day of the year, they range from 34°F to 66°F.
Average High and Low Temperature in the Fall in San Ildefonso
The figure below shows you a compact characterization of the hourly average fall temperatures. 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 the Fall in San Ildefonso
The fall in San Ildefonso experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 90% to 45%. The highest chance of overcast or mostly cloudy conditions is 90% on September 13. The lowest chance of overcast or mostly cloudy conditions is 45% on November 30.
The clearest day of the fall is November 30, with clear, mostly clear, or partly cloudy conditions 55% of the time.
For reference, on September 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 90%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.
Cloud Cover Categories in the Fall in San Ildefonso
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 Ildefonso, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 71% and ending it at 2%.
For reference, the year's highest daily chance of a wet day is 78% on July 15, and its lowest chance is 1% on December 8.
Probability of Precipitation in the Fall in San Ildefonso
To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during the fall in San Ildefonso is very rapidly decreasing, starting the season at 4.6 inches, when it rarely exceeds 6.9 inches or falls below 2.5 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.4 inches.
Average Monthly Rainfall in the Fall in San Ildefonso
Over the course of the fall in San Ildefonso, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 27 minutes, implying an average daily decrease of 58 seconds, and weekly decrease of 6 minutes, 47 seconds.
The shortest day of the fall is November 30, with 11 hours, 3 minutes of daylight and the longest day is September 1, with 12 hours, 30 minutes of daylight.
Hours of Daylight and Twilight in the Fall in San Ildefonso
The latest sunrise of the fall in San Ildefonso is 7:39 AM on October 30 and the earliest sunrise is 1 hour, 0 minutes earlier at 6:39 AM on October 31.
The latest sunset is 7:53 PM on September 1 and the earliest sunset is 1 hour, 55 minutes earlier at 5:58 PM on November 25.
Daylight saving time (DST) ends at 1:00 AM on October 31, 2021, shifting sunrise and sunset to be an hour earlier.
For reference, on June 21, the longest day of the year, the Sun rises at 7:01 AM and sets 13 hours, 19 minutes later, at 8:20 PM, while on December 21, the shortest day of the year, it rises at 7:08 AM and sets 10 hours, 57 minutes later, at 6:06 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall in San Ildefonso
The figure below presents a compact representation of key lunar data for the fall of 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 the Fall in San Ildefonso
The chance that a given day will be muggy in San Ildefonso is essentially constant during the fall, remaining around 0% throughout.
For reference, on June 21, 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 the Fall in San Ildefonso
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in San Ildefonso is essentially constant during the fall, remaining within 0.3 miles per hour of 4.8 miles per hour throughout.
For reference, on March 24, the windiest day of the year, the daily average wind speed is 5.9 miles per hour, while on July 14, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.
The highest daily average wind speed during the fall is 5.1 miles per hour on September 29.
Average Wind Speed in the Fall in San Ildefonso
The hourly average wind direction in San Ildefonso throughout the fall is predominantly from the east, with a peak proportion of 62% on September 1.
Wind Direction in the Fall in San Ildefonso
The growing season in San Ildefonso typically lasts for 8.6 months (263 days), from around March 4 to around November 22, rarely starting before January 31 or after April 2, and rarely ending before October 26 or after December 25.
During the fall in San Ildefonso, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 38% over the course of the season.
Time Spent in Various Temperature Bands and the Growing Season in the Fall in San Ildefonso
The average accumulated growing degree days in San Ildefonso are rapidly increasing during the fall, increasing by 655°F, from 2,039°F to 2,695°F, over the course of the season.
Growing Degree Days in the Fall in San Ildefonso
The average daily incident shortwave solar energy in San Ildefonso is gradually decreasing during the fall, falling by 0.5 kWh, from 5.6 kWh to 5.1 kWh, over the course of the season.
Average Daily Incident Shortwave Solar Energy in the Fall in San Ildefonso
For the purposes of this report, the geographical coordinates of San Ildefonso are 19.561 deg latitude, -99.786 deg longitude, and 8,330 ft elevation.
The topography within 2 miles of San Ildefonso contains only modest variations in elevation, with a maximum elevation change of 328 feet and an average elevation above sea level of 8,366 feet. Within 10 miles contains only modest variations in elevation (2,776 feet). Within 50 miles contains large variations in elevation (12,795 feet).
The area within 2 miles of San Ildefonso is covered by cropland (93%), within 10 miles by cropland (78%) and shrubs (13%), and within 50 miles by cropland (38%) and trees (30%).
This report illustrates the typical weather in San Ildefonso, 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 San Ildefonso.
For each station, the records are corrected for the elevation difference between that station and San Ildefonso 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 San Ildefonso is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Ildefonso and a given station.
The stations contributing to this reconstruction are: Licenciado Adolfo López Mateos International Airport (MMTO, 89%, 34 kilometers, southeast) and Querétaro Intercontinental Airport (MMQT, 11%, 125 kilometers, north).
Time zones for airports and weather stations are provided by AskGeo.com .