Average Weather in May in San Julián Argentina
Daily high temperatures decrease by 8°F, from 55°F to 47°F, rarely falling below 40°F or exceeding 64°F.
Daily low temperatures decrease by 5°F, from 42°F to 36°F, rarely falling below 29°F or exceeding 49°F.
For reference, on January 17, the hottest day of the year, temperatures in San Julián typically range from 53°F to 70°F, while on July 14, the coldest day of the year, they range from 34°F to 44°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
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 month of May in San Julián experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 51% throughout the month. The highest chance of overcast or mostly cloudy conditions is 53% on May 21.
The clearest day of the month is May 2, with clear, mostly clear, or partly cloudy conditions 50% of the time.
For reference, on May 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on March 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 60%.
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 Julián, the chance of a wet day over the course of May is gradually increasing, starting the month at 11% and ending it at 15%.
For reference, the year's highest daily chance of a wet day is 15% on May 28, and its lowest chance is 7% on September 26.
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 Julián is essentially constant, remaining about 0.8 inches throughout, and rarely exceeding 1.9 inches or falling below 0.1 inches.
Average Monthly Rainfall in May
Over the course of May in San Julián, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 15 minutes, implying an average daily decrease of 2 minutes, 29 seconds, and weekly decrease of 17 minutes, 26 seconds.
The shortest day of the month is May 31, with 8 hours, 28 minutes of daylight and the longest day is May 1, with 9 hours, 43 minutes of daylight.
Hours of Daylight and Twilight in May
The earliest sunrise of the month in San Julián is 8:36 AM on May 1 and the latest sunrise is 38 minutes later at 9:14 AM on May 31.
The latest sunset is 6:19 PM on May 1 and the earliest sunset is 36 minutes earlier at 5:42 PM on May 31.
Daylight saving time is not observed in San Julián during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 5:21 AM and sets 16 hours, 16 minutes later, at 9:36 PM, while on June 21, the shortest day of the year, it rises at 9:27 AM and sets 8 hours, 11 minutes later, at 5:38 PM.
Sunrise & Sunset with Twilight in May
The figure below presents a compact representation of key lunar data for May 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 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 Julián is essentially constant during May, remaining around 0% throughout.
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 Julián is essentially constant during May, remaining within 0.2 miles per hour of 15.1 miles per hour throughout.
For reference, on December 9, the windiest day of the year, the daily average wind speed is 15.7 miles per hour, while on October 2, the calmest day of the year, the daily average wind speed is 14.1 miles per hour.
The lowest daily average wind speed during May is 15.0 miles per hour on May 18.
Average Wind Speed in May
The hourly average wind direction in San Julián throughout May is predominantly from the west, with a peak proportion of 58% on May 1.
Wind Direction in May
San Julián 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 Julián is gradually decreasing during May, falling by 3°F, from 49°F to 47°F, over the course of the month.
Average Water Temperature 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).
The growing season in San Julián typically lasts for 7.8 months (236 days), from around September 19 to around May 14, rarely starting before August 25 or after October 16, and rarely ending before April 16 or after June 8.
During May in San Julián, the chance that a given day is within the growing season is very rapidly decreasing falling from 74% to 19% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
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 San Julián are essentially constant during May, remaining within 15°F of 1,660°F throughout.
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 Julián is gradually decreasing during May, falling by 0.8 kWh, from 1.9 kWh to 1.1 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 Julián are -49.306 deg latitude, -67.727 deg longitude, and 66 ft elevation.
The topography within 2 miles of San Julián contains only modest variations in elevation, with a maximum elevation change of 187 feet and an average elevation above sea level of 26 feet. Within 10 miles contains only modest variations in elevation (1,027 feet). Within 50 miles also contains very significant variations in elevation (1,552 feet).
The area within 2 miles of San Julián is covered by water (46%), sparse vegetation (28%), and trees (10%), within 10 miles by sparse vegetation (43%) and water (38%), and within 50 miles by water (43%) and sparse vegetation (26%).
This report illustrates the typical weather in San Julián, 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 is only a single weather station, Capitán José Daniel Vazquez Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Julián.
At a distance of 5 kilometers from San Julián, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and San Julián according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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.