Average Weather in April in Santa María del Río Mexico
Daily high temperatures increase by 3°F, from 81°F to 83°F, rarely falling below 73°F or exceeding 90°F.
Daily low temperatures increase by 4°F, from 51°F to 55°F, rarely falling below 45°F or exceeding 60°F.
For reference, on May 10, the hottest day of the year, temperatures in Santa María del Río typically range from 56°F to 84°F, while on January 7, the coldest day of the year, they range from 42°F to 69°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
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
Cochabamba, Bolivia (3,582 miles away); Lalapanzi, Zimbabwe (9,280 miles); and Soavinandriana, Madagascar (10,339 miles) are the far-away foreign places with temperatures most similar to Santa María del Río (view comparison).
The month of April in Santa María del Río experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 40% throughout the month. The highest chance of overcast or mostly cloudy conditions is 42% on April 9.
The clearest day of the month is April 25, with clear, mostly clear, or partly cloudy conditions 62% of the time.
For reference, on September 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 77%, while on May 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.
Cloud Cover Categories in April
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 Santa María del Río, the chance of a wet day over the course of April is rapidly increasing, starting the month at 5% and ending it at 11%.
For reference, the year's highest daily chance of a wet day is 40% on July 15, and its lowest chance is 2% on December 8.
Probability of Precipitation in April
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 April in Santa María del Río is gradually increasing, starting the month at 0.4 inches, when it rarely exceeds 1.4 inches or falls below -0.0 inches, and ending the month at 0.8 inches, when it rarely exceeds 2.3 inches.
Average Monthly Rainfall in April
Over the course of April in Santa María del Río, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 34 minutes, implying an average daily increase of 1 minute, 11 seconds, and weekly increase of 8 minutes, 15 seconds.
The shortest day of the month is April 1, with 12 hours, 22 minutes of daylight and the longest day is April 30, with 12 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in April
The earliest sunrise of the month in Santa María del Río is 6:31 AM on April 6 and the latest sunrise is 59 minutes later at 7:30 AM on April 7.
The earliest sunset is 6:57 PM on April 1 and the latest sunset is 1 hour, 10 minutes later at 8:08 PM on April 30.
Daylight saving time (DST) starts at 3:00 AM on April 7, 2019, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 7:00 AM and sets 13 hours, 28 minutes later, at 8:28 PM, while on December 22, the shortest day of the year, it rises at 7:17 AM and sets 10 hours, 48 minutes later, at 6:05 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
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 Santa María del Río is essentially constant during April, remaining around 0% throughout.
For reference, on June 25, 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 April
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 Santa María del Río is gradually decreasing during April, decreasing from 8.8 miles per hour to 8.0 miles per hour over the course of the month.
For reference, on July 2, the windiest day of the year, the daily average wind speed is 9.4 miles per hour, while on December 2, the calmest day of the year, the daily average wind speed is 7.1 miles per hour.
Average Wind Speed in April
Wind Direction in April
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).
The growing season in Santa María del Río typically lasts for 12 months (353 days), from around January 16 to around January 5, rarely starting after March 1, or ending before November 19.
The month of April in Santa María del Río is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in April
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
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 Santa María del Río are rapidly increasing during April, increasing by 495°F, from 889°F to 1,383°F, over the course of the month.
Growing Degree Days in April
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 Santa María del Río is essentially constant during April, remaining within 0.2 kWh of 7.3 kWh throughout.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Santa María del Río are 21.796 deg latitude, -100.738 deg longitude, and 6,056 ft elevation.
The topography within 2 miles of Santa María del Río contains very significant variations in elevation, with a maximum elevation change of 1,017 feet and an average elevation above sea level of 5,911 feet. Within 10 miles contains very significant variations in elevation (2,986 feet). Within 50 miles contains large variations in elevation (6,867 feet).
The area within 2 miles of Santa María del Río is covered by shrubs (54%) and grassland (43%), within 10 miles by grassland (50%) and shrubs (44%), and within 50 miles by grassland (39%) and shrubs (35%).
This report illustrates the typical weather in Santa María del Río 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 Santa María del Río.
For each station, the records are corrected for the elevation difference between that station and Santa María del Río 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 Santa María del Río is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Santa María del Río and a given station.
The stations contributing to this reconstruction are: Ponciano Arriaga International Airport (65%, 55 kilometers, north); Del Bajío International Airport (20%, 119 kilometers, southwest); and Querétaro Intercontinental Airport (15%, 143 kilometers, southeast).
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.
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.