Average Weather on May 31 in Port Elizabeth South Africa
On May 31, the temperature in Port Elizabeth typically ranges from 53°F to 69°F and is rarely below 45°F or above 81°F.
For reference, on January 27, the hottest day of the year, temperatures in Port Elizabeth typically range from 64°F to 80°F, while on July 9, the coldest day of the year, they range from 47°F to 68°F.
The coolest time of the day is from 9:45 PM to 8:30 AM, with the coldest at 6:15 AM, at which time the temperature is below 57°F three days out of four, and below 60°F nine days out of ten.
The warmest time of the day is from 11:00 AM to 4:15 PM, with the hottest at 1:45 PM, at which time the temperature is above 65°F three days out of four, and above 61°F nine days out of ten.
The day has gained half its heat by 9:30 AM and lost it again by 6:00 PM.
Average Temperature on May 31
The figure below shows you a compact characterization of the range of temperatures experienced on May 31 throughout the historical record. The horizontal axis is the time of day and the colored stacked areas indicate the percentage of hours spent in various temperature bands.
Temperature Bands on May 31
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
Compared to May 31 (excluding 30 days before and after), August 26 has the most similar daily average high and low temperatures.
In Port Elizabeth on May 31, the average percentage of the sky covered by clouds does not show significant systematic variation over the course of the day, with the percentage of time that the sky is overcast or mostly cloudy remaining about 36% throughout the day.
For reference, on May 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on February 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 84%.
Cloud Cover Categories on May 31
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
On average, there is a 9% chance that more than 0.04 inches of total precipitation will fall in Port Elizabeth throughout the day on May 31, all of which can be expected to be rain.
For reference, the year's highest daily chance of precipitation is 19% on November 13, and its lowest chance is 7% on June 30.
For those 9% of years with precipitation on May 31, the chart below shows when throughout the day that precipitation is more or less likely to occur, excluding hourly accumulations of less than 0.01 inches. If precipitation were equally likely throughout the day, all hours would report 4.2% (100% divided by 24 hours).
Precipitation is most likely between 9 AM and 10 AM, and least likely between 1 AM and 2 AM.
Hourly Share of Precipitation on May 31
In Port Elizabeth on Sunday, May 31, 2020, the Sun rises at 7:13 AM and sets 10 hours, 3 minutes later, at 5:16 PM. Solar noon is at 12:15 PM.
For reference, on December 21, the longest day of the year, the Sun rises at 5:03 AM and sets 14 hours, 25 minutes later, at 7:28 PM, while on June 20, the shortest day of the year, it rises at 7:22 AM and sets 9 hours, 54 minutes later, at 5:16 PM.
Civil twilight, the period before the Sun has risen or after the Sun has set during which time it is possible to engage in most outdoor activities without artificial lighting, begins and ends 27 minutes before sunrise and after sunset, at 6:46 AM and 5:44 PM respectively.
Nautical twilight, during which time it is possible to clearly discern the horizon (e.g., for navigational purposes), begins and ends 58 minutes before sunrise and after sunset, at 6:15 AM and 6:15 PM respectively.
Astronomical twilight, outside of which it is possible to make the most sensitive of astronomical observations, begins and ends 1 hour, 28 minutes before sunrise and after sunset, at 5:45 AM and 6:45 PM respectively.
Solar Elevation on May 31, 2020
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.
Muggy conditions are essentially unheard-of in Port Elizabeth on May 31.
Humidity Comfort Levels on May 31
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 Port Elizabeth on May 31 varies throughout the day, with a daily average of 11.2 miles per hour.
The windiest time of day is around 10:00 AM, with an average hourly wind speed of 12.6 miles per hour, mostly staying between 9.3 miles per hour and 15.5 miles per hour, and rarely falling below 6.3 miles per hour or exceeding 19.7 miles per hour.
The calmest time of day is around 4:45 PM, with an average hourly wind speed of 10.4 miles per hour, mostly staying between 6.3 miles per hour and 13.6 miles per hour, and rarely falling below 4.1 miles per hour or exceeding 18.3 miles per hour.
For reference, on October 19, the windiest day of the year, the daily average wind speed is 12.7 miles per hour, while on May 3, the calmest day of the year, the daily average wind speed is 10.5 miles per hour.
Wind Speed on May 31
Over the entire course of May 31 in Port Elizabeth, the hourly average wind direction, in order of prevalence, is from the west (48%), north (27%), east (13%), and south (11%).
Wind Direction on May 31
Port Elizabeth 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 does not change appreciably over the course of the day, so this section does not include a chart.
The average surface water temperature on May 31 in Port Elizabeth is 66°F, mostly staying between 65°F and 68°F, and rarely falling below 64°F or exceeding 69°F.
For reference, the year's highest average is 71°F on February 13, and its lowest average is 63°F on August 23.
Shortwave Solar Power
This section discusses the incident shortwave solar power 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 peak incident shortwave solar power per square meter is 0.47 kilowatts at around 12:15 PM.
In contrast, the corresponding value on January 1, the brightest day of the year, is 0.97 kilowatts at around 11:15 AM. The corresponding value on June 17, the darkest day of the year, is 0.45 kilowatts at around 11:15 AM.
Shortwave Solar Power on May 31
For the purposes of this report, the geographical coordinates of Port Elizabeth are -33.918 deg latitude, 25.570 deg longitude, and 154 ft elevation.
The topography within 2 miles of Port Elizabeth contains significant variations in elevation, with a maximum elevation change of 509 feet and an average elevation above sea level of 190 feet. Within 10 miles contains significant variations in elevation (968 feet). Within 50 miles contains very significant variations in elevation (4,573 feet).
The area within 2 miles of Port Elizabeth is covered by artificial surfaces (97%), within 10 miles by water (33%) and artificial surfaces (30%), and within 50 miles by water (60%) and shrubs (25%).
This report illustrates the typical weather in Port Elizabeth, 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, Port Elizabeth Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Port Elizabeth.
At a distance of 9 kilometers from Port Elizabeth, 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 Port Elizabeth 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 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.