Fall Weather in San Sebastián del Sur Mexico
Daily high temperatures decrease by 2°F, from 78°F to 76°F, rarely falling below 72°F or exceeding 82°F. The highest daily average high temperature is 78°F on October 9.
Daily low temperatures decrease by 15°F, from 61°F to 46°F, rarely falling below 40°F or exceeding 63°F.
For reference, on May 16, the hottest day of the year, temperatures in San Sebastián del Sur typically range from 56°F to 86°F, while on January 13, the coldest day of the year, they range from 43°F to 73°F.
Average High and Low Temperature in the Fall in San Sebastián del Sur
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 Sebastián del Sur
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The fall in San Sebastián del Sur experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 93% to 45%. The highest chance of overcast or mostly cloudy conditions is 93% on September 3. The lowest chance of overcast or mostly cloudy conditions is 45% on November 24.
The clearest day of the fall is November 24, with clear, mostly clear, or partly cloudy conditions 55% of the time.
For reference, on September 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 93%, while on February 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 63%.
Cloud Cover Categories in the Fall in San Sebastián del Sur
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 Sebastián del Sur, 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 4%.
For reference, the year's highest daily chance of a wet day is 75% on August 22, and its lowest chance is 1% on April 4.
Probability of Precipitation in the Fall in San Sebastián del Sur
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 Sebastián del Sur is very rapidly decreasing, starting the season at 6.0 inches, when it rarely exceeds 9.1 inches or falls below 3.3 inches, and ending the season at 0.3 inches, when it rarely exceeds 1.0 inches or falls below -0.0 inches.
The highest average 31-day accumulation is 6.0 inches on September 1.
Average Monthly Rainfall in the Fall in San Sebastián del Sur
Over the course of the fall in San Sebastián del Sur, 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, 28 minutes, implying an average daily decrease of 59 seconds, and weekly decrease of 6 minutes, 52 seconds.
The shortest day of the fall is November 30, with 11 hours, 2 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 Sebastián del Sur
The latest sunrise of the fall in San Sebastián del Sur is 7:54 AM on October 30 and the earliest sunrise is 1 hour, 0 minutes earlier at 6:54 AM on October 31.
The latest sunset is 8:08 PM on September 1 and the earliest sunset is 1 hour, 55 minutes earlier at 6:13 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 7:15 AM and sets 13 hours, 20 minutes later, at 8:35 PM, while on December 21, the shortest day of the year, it rises at 7:24 AM and sets 10 hours, 56 minutes later, at 6:20 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall in San Sebastián del Sur
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 Sebastián del Sur
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 San Sebastián del Sur is gradually decreasing during the fall, falling from 4% to 0% over the course of the season.
The highest chance of a muggy day during the fall is 5% on September 19.
For reference, on June 22, the muggiest day of the year, there are muggy conditions 5% 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 Sebastián del Sur
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 San Sebastián del Sur is essentially constant during the fall, remaining within 0.1 miles per hour of 4.5 miles per hour throughout.
For reference, on April 17, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.
Average Wind Speed in the Fall in San Sebastián del Sur
The wind direction in San Sebastián del Sur during the fall is predominantly out of the south from September 1 to October 1, the east from October 1 to November 3, and the west from November 3 to November 30.
Wind Direction in the Fall in San Sebastián del Sur
San Sebastián del Sur is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in San Sebastián del Sur is gradually decreasing during the fall, falling by 2°F, from 85°F to 83°F, over the course of the season.
Average Water Temperature in the Fall in San Sebastián del Sur
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).
While it does not do so every year, freezing temperatures are seen in San Sebastián del Sur over some winters. The day least likely to be in the growing season is January 16, with a 76% chance.
Time Spent in Various Temperature Bands and the Growing Season in the Fall in San Sebastián del Sur
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 San Sebastián del Sur are very rapidly increasing during the fall, increasing by 1,375°F, from 3,942°F to 5,317°F, over the course of the season.
Growing Degree Days in the Fall in San Sebastián del Sur
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 San Sebastián del Sur is essentially constant during the fall, remaining within 0.2 kWh of 4.9 kWh throughout.
The highest average daily incident shortwave solar energy during the fall is 5.0 kWh on November 7.
Average Daily Incident Shortwave Solar Energy in the Fall in San Sebastián del Sur
For the purposes of this report, the geographical coordinates of San Sebastián del Sur are 19.794 deg latitude, -103.473 deg longitude, and 4,993 ft elevation.
The topography within 2 miles of San Sebastián del Sur contains very significant variations in elevation, with a maximum elevation change of 1,480 feet and an average elevation above sea level of 5,162 feet. Within 10 miles contains very significant variations in elevation (4,980 feet). Within 50 miles also contains extreme variations in elevation (13,186 feet).
The area within 2 miles of San Sebastián del Sur is covered by cropland (65%) and trees (32%), within 10 miles by trees (56%) and cropland (31%), and within 50 miles by trees (50%) and cropland (28%).
This report illustrates the typical weather in San Sebastián del Sur, 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 Sebastián del Sur.
For each station, the records are corrected for the elevation difference between that station and San Sebastián del Sur 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 Sebastián del Sur is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Sebastián del Sur and a given station.
The stations contributing to this reconstruction are: Guadalajara International Airport (MMGL, 79%, 83 kilometers, north) and Playa de Oro International Airport (MMZO, 21%, 135 kilometers, southwest).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.