May Weather in Jaltepec MexicoDaily high temperatures are around 74°F, rarely falling below 67°F or exceeding 81°F. The highest daily average high temperature is 75°F on May 9. Daily low temperatures are around 51°F, rarely falling below 45°F or exceeding 55°F. For reference, on May 8, the hottest day of the year, temperatures in Jaltepec typically range from 50°F to 75°F, while on January 12, the coldest day of the year, they range from 40°F to 66°F. 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. Arani, Bolivia (3,411 miles away) is the far-away foreign place with temperatures most similar to Jaltepec (view comparison). CloudsThe month of May in Jaltepec experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 44% to 59%. The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 56% of the time. For reference, on September 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 88%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Jaltepec, the chance of a wet day over the course of May is very rapidly increasing, starting the month at 28% and ending it at 47%. For reference, the year's highest daily chance of a wet day is 81% on July 3, and its lowest chance is 5% on December 25. RainfallTo 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 Jaltepec is very rapidly increasing, starting the month at 1.4 inches, when it rarely exceeds 2.6 inches or falls below 0.4 inches, and ending the month at 3.5 inches, when it rarely exceeds 6.2 inches or falls below 1.3 inches. SunOver the course of May in Jaltepec, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 22 minutes, implying an average daily increase of 44 seconds, and weekly increase of 5 minutes, 8 seconds. The shortest day of the month is May 1, with 12 hours, 53 minutes of daylight and the longest day is May 31, with 13 hours, 15 minutes of daylight. The latest sunrise of the month in Jaltepec is 6:05 AM on May 1 and the earliest sunrise is 10 minutes earlier at 5:55 AM on May 31. The earliest sunset is 6:58 PM on May 1 and the latest sunset is 12 minutes later at 7:09 PM on May 31. Daylight saving time is not observed in Jaltepec during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:56 AM and sets 13 hours, 19 minutes later, at 7:16 PM, while on December 21, the shortest day of the year, it rises at 7:04 AM and sets 10 hours, 56 minutes later, at 6:01 PM. The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. MoonThe figure below presents a compact representation of key lunar data for May 2024. 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.
HumidityWe 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 Jaltepec is essentially constant during May, remaining around 0% throughout. WindThis 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 Jaltepec is essentially constant during May, remaining within 0.1 miles per hour of 5.3 miles per hour throughout. For reference, on September 24, the windiest day of the year, the daily average wind speed is 5.8 miles per hour, while on December 2, the calmest day of the year, the daily average wind speed is 4.6 miles per hour. The wind direction in Jaltepec during May is predominantly out of the south from May 1 to May 16, the north from May 16 to May 27, and the east from May 27 to May 31. Growing SeasonDefinitions 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 Jaltepec typically lasts for 11 months (330 days), from around January 26 to around December 21, rarely starting after March 10, or ending before November 3. The month of May in Jaltepec is reliably fully within the growing season. 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 Jaltepec are increasing during May, increasing by 357°F, from 963°F to 1,320°F, over the course of the month. Solar EnergyThis 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 Jaltepec is essentially constant during May, remaining within 0.1 kWh of 7.2 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Jaltepec are 19.730 deg latitude, -98.635 deg longitude, and 8,330 ft elevation. The topography within 2 miles of Jaltepec contains very significant variations in elevation, with a maximum elevation change of 1,388 feet and an average elevation above sea level of 8,311 feet. Within 10 miles contains very significant variations in elevation (3,038 feet). Within 50 miles contains large variations in elevation (15,210 feet). The area within 2 miles of Jaltepec is covered by grassland (68%) and cropland (20%), within 10 miles by grassland (47%) and cropland (32%), and within 50 miles by cropland (35%) and shrubs (22%). Data SourcesThis report illustrates the typical weather in Jaltepec, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Jaltepec. For each station, the records are corrected for the elevation difference between that station and Jaltepec 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 Jaltepec is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jaltepec and a given station. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Jaltepec and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll 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 © OpenStreetMap contributors. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |