Summer Weather in San José de Jáchal ArgentinaDaily high temperatures are around 85°F, rarely falling below 74°F or exceeding 94°F. The highest daily average high temperature is 87°F on January 1. Daily low temperatures are around 62°F, rarely falling below 52°F or exceeding 70°F. The highest daily average low temperature is 64°F on January 14. For reference, on January 1, the hottest day of the year, temperatures in San José de Jáchal typically range from 64°F to 87°F, while on July 10, the coldest day of the year, they range from 34°F to 59°F. The figure below shows you a compact characterization of the hourly average summer 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. Alpine, United States (4,780 miles away); Quorn, Australia (7,779 miles); and Dunedoo, Australia (7,471 miles) are the far-away foreign places with temperatures most similar to San José de Jáchal (view comparison). CloudsThe summer in San José de Jáchal experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 19% throughout the season. The highest chance of overcast or mostly cloudy conditions is 22% on January 9. The clearest day of the summer is December 9, with clear, mostly clear, or partly cloudy conditions 84% of the time. For reference, on May 31, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 41%, while on March 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San José de Jáchal, the chance of a wet day over the course of the summer is rapidly increasing, starting the season at 9% and ending it at 16%. For reference, the year's highest daily chance of a wet day is 18% on February 21, and its lowest chance is 1% on August 10. RainfallTo 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 summer in San José de Jáchal is increasing, starting the season at 0.5 inches, when it rarely exceeds 1.2 inches, and ending the season at 1.0 inches, when it rarely exceeds 2.4 inches or falls below 0.1 inches. The highest average 31-day accumulation is 1.2 inches on February 14. SunOver the course of the summer in San José de Jáchal, 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, 14 minutes, implying an average daily decrease of 50 seconds, and weekly decrease of 5 minutes, 48 seconds. The shortest day of the summer is February 28, with 12 hours, 44 minutes of daylight and the longest day is December 21, with 14 hours, 6 minutes of daylight. The earliest sunrise of the summer in San José de Jáchal is 6:25 AM on December 2 and the latest sunrise is 1 hour, 0 minutes later at 7:25 AM on February 28. The latest sunset is 8:41 PM on January 8 and the earliest sunset is 32 minutes earlier at 8:09 PM on February 28. Daylight saving time is not observed in San José de Jáchal during 2024. For reference, on December 21, the longest day of the year, the Sun rises at 6:30 AM and sets 14 hours, 6 minutes later, at 8:36 PM, while on June 20, the shortest day of the year, it rises at 8:30 AM and sets 10 hours, 12 minutes later, at 6:42 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 the summer of 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 San José de Jáchal is essentially constant during the summer, remaining within 1% of 1% throughout. The highest chance of a muggy day during the summer is 2% on January 26. For reference, on January 26, the muggiest day of the year, there are muggy conditions 2% of the time, while on May 21, the least muggy day of the year, there are muggy conditions 0% of the time. 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 San José de Jáchal is decreasing during the summer, decreasing from 8.8 miles per hour to 7.6 miles per hour over the course of the season. For reference, on December 7, the windiest day of the year, the daily average wind speed is 8.9 miles per hour, while on June 14, the calmest day of the year, the daily average wind speed is 5.6 miles per hour. The highest daily average wind speed during the summer is 8.9 miles per hour on December 7. The hourly average wind direction in San José de Jáchal throughout the summer is predominantly from the east, with a peak proportion of 58% on January 12. 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 San José de Jáchal typically lasts for 8.5 months (257 days), from around September 9 to around May 24, rarely starting before August 18 or after October 1, and rarely ending before April 29 or after June 17. The summer in San José de Jáchal 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 San José de Jáchal are very rapidly increasing during the summer, increasing by 2,084°F, from 1,523°F to 3,607°F, over the course of the season. 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 San José de Jáchal is rapidly decreasing during the summer, falling by 1.6 kWh, from 8.8 kWh to 7.2 kWh, over the course of the season. The highest average daily incident shortwave solar energy during the summer is 8.8 kWh on December 7. TopographyFor the purposes of this report, the geographical coordinates of San José de Jáchal are -30.241 deg latitude, -68.747 deg longitude, and 3,858 ft elevation. The topography within 2 miles of San José de Jáchal contains only modest variations in elevation, with a maximum elevation change of 397 feet and an average elevation above sea level of 3,896 feet. Within 10 miles contains only modest variations in elevation (5,531 feet). Within 50 miles also contains extreme variations in elevation (14,032 feet). The area within 2 miles of San José de Jáchal is covered by bare soil (45%), trees (23%), and grassland (20%), within 10 miles by sparse vegetation (34%) and trees (22%), and within 50 miles by bare soil (49%) and trees (16%). Data SourcesThis report illustrates the typical weather in San José de Jáchal, 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 is only a single weather station, Domingo Faustino Sarmiento Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San José de Jáchal. At a distance of 151 kilometers from San José de Jáchal, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere . The weight assigned to the MERRA-2 value depends on the distance from San José de Jáchal to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 3%, making the weight assigned to the weather station 97%. 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. 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