Average Weather in May in San Antonio de la Cal Mexico
Daily high temperatures decrease by 4°F, from 87°F to 83°F, rarely falling below 77°F or exceeding 93°F.
Daily low temperatures increase by 2°F, from 59°F to 61°F, rarely falling below 55°F or exceeding 65°F.
For reference, on April 17, the hottest day of the year, temperatures in San Antonio de la Cal typically range from 58°F to 87°F, while on January 13, the coldest day of the year, they range from 48°F to 78°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
Lusaka, Zambia (8,807 miles away); Laela, Tanzania (8,954 miles); and Āgaro, Ethiopia (8,826 miles) are the far-away foreign places with temperatures most similar to San Antonio de la Cal (view comparison).
The month of May in San Antonio de la Cal experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 54% to 79%.
The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 46% of the time.
For reference, on June 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 93%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.
Cloud Cover Categories in May
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 Antonio de la Cal, the chance of a wet day over the course of May is very rapidly increasing, starting the month at 21% and ending it at 47%.
For reference, the year's highest daily chance of a wet day is 70% on September 5, and its lowest chance is 3% on January 10.
Probability of Precipitation in May
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during May in San Antonio de la Cal is very rapidly increasing, starting the month at 1.6 inches, when it rarely exceeds 2.9 inches or falls below 0.1 inches, and ending the month at 4.6 inches, when it rarely exceeds 8.6 inches or falls below 1.8 inches.
Average Monthly Rainfall in May
Over the course of May in San Antonio de la Cal, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 19 minutes, implying an average daily increase of 38 seconds, and weekly increase of 4 minutes, 26 seconds.
The shortest day of the month is May 1, with 12 hours, 45 minutes of daylight and the longest day is May 31, with 13 hours, 4 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in San Antonio de la Cal is 7:01 AM on May 1 and the earliest sunrise is 9 minutes earlier at 6:52 AM on May 31.
The earliest sunset is 7:46 PM on May 1 and the latest sunset is 10 minutes later at 7:56 PM on May 31.
Daylight saving time is observed in San Antonio de la Cal during 2018, but it neither starts nor ends during May, 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, 9 minutes later, at 8:03 PM, while on December 21, the shortest day of the year, it rises at 6:51 AM and sets 11 hours, 7 minutes later, at 5:58 PM.
Sunrise & Sunset with Twilight in May
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 Antonio de la Cal is essentially constant during May, remaining around 0% throughout.
For reference, on September 24, the muggiest day of the year, there are muggy conditions 1% 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 May
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 Antonio de la Cal is essentially constant during May, remaining within 0.1 miles per hour of 5.3 miles per hour throughout.
For reference, on November 8, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on May 28, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
The lowest daily average wind speed during May is 5.2 miles per hour on May 31.
Average Wind Speed in May
Wind Direction in May
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).
Temperatures in San Antonio de la Cal 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 May
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 Antonio de la Cal are rapidly increasing during May, increasing by 664°F, from 2,120°F to 2,785°F, over the course of the month.
Growing Degree Days in May
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 Antonio de la Cal is gradually decreasing during May, falling by 0.9 kWh, from 6.8 kWh to 6.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of San Antonio de la Cal are 17.028 deg latitude, -96.701 deg longitude, and 5,102 ft elevation.
The topography within 2 miles of San Antonio de la Cal contains very significant variations in elevation, with a maximum elevation change of 1,749 feet and an average elevation above sea level of 5,307 feet. Within 10 miles contains very significant variations in elevation (5,823 feet). Within 50 miles also contains extreme variations in elevation (10,495 feet).
The area within 2 miles of San Antonio de la Cal is covered by artificial surfaces (45%), cropland (29%), and shrubs (13%), within 10 miles by grassland (30%) and shrubs (29%), and within 50 miles by trees (48%) and shrubs (33%).
This report illustrates the typical weather in San Antonio de la Cal 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in San Antonio de la Cal.
For each station, the records are corrected for the elevation difference between that station and San Antonio de la Cal 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 Antonio de la Cal is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Antonio de la Cal and a given station.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.