Average Weather in July in Port Moresby Papua New Guinea
In Port Moresby, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 83°F throughout the month, rarely exceeding 87°F or dropping below 80°F.
Daily low temperatures are around 74°F, rarely falling below 71°F or exceeding 76°F.
For reference, on December 14, the hottest day of the year, temperatures in Port Moresby typically range from 76°F to 88°F, while on August 1, the coldest day of the year, they range from 73°F to 83°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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 July
The month of July in Port Moresby experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 71% to 65%.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 35% of the time.
For reference, on January 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 92%, while on August 19, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%.
Cloud Cover in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Port Moresby, the chance of a wet day over the course of July is gradually decreasing, starting the month at 12% and ending it at 8%.
For reference, the year's highest daily chance of a wet day is 49% on March 1, and its lowest chance is 7% on July 17.
Probability of Precipitation in July
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 July in Port Moresby is gradually decreasing, starting the month at 1.2 inches, when it rarely exceeds 3.0 inches, and ending the month at 0.8 inches, when it rarely exceeds 2.6 inches or falls below -0.0 inches.
Average Monthly Rainfall in July
Over the course of July in Port Moresby, the length of the day is essentially constant. The shortest day of the month is July 1, with 11 hours, 35 minutes of daylight and the longest day is July 31, with 11 hours, 42 minutes of daylight.
Hours of Daylight and Twilight in July
The latest sunrise of the month in Port Moresby is 6:28 AM on July 14 and the earliest sunrise is 1 minute, 54 seconds earlier at 6:26 AM on July 31.
The earliest sunset is 6:02 PM on July 1 and the latest sunset is 6 minutes later at 6:08 PM on July 31.
Daylight saving time is not observed in Port Moresby during 2017.
For reference, on December 21, the longest day of the year, the Sun rises at 5:48 AM and sets 12 hours, 41 minutes later, at 6:29 PM, while on June 21, the shortest day of the year, it rises at 6:25 AM and sets 11 hours, 34 minutes later, at 6:00 PM.
Sunrise & Sunset with Twilight in July
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 Port Moresby is gradually decreasing during July, falling from 98% to 93% over the course of the month.
For reference, on February 10, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 14, the least muggy day of the year, there are muggy conditions 92% of the time.
Humidity Comfort Levels in July
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 Moresby is essentially constant during July, remaining within 0.2 miles per hour of 6.7 miles per hour throughout.
For reference, on July 31, the windiest day of the year, the daily average wind speed is 6.9 miles per hour, while on March 23, the calmest day of the year, the daily average wind speed is 4.0 miles per hour.
The highest daily average wind speed during July is 6.9 miles per hour on July 31.
Average Wind Speed in July
Wind Direction in July
Port Moresby 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 Port Moresby is essentially constant during July, remaining within 1°F of 78°F throughout.
Average Water Temperature in July
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 Port Moresby is gradually increasing during July, rising by 0.6 kWh, from 4.9 kWh to 5.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Port Moresby are -9.443 deg latitude, 147.180 deg longitude, and 187 ft elevation.
The topography within 2 miles of Port Moresby contains significant variations in elevation, with a maximum elevation change of 764 feet and an average elevation above sea level of 278 feet. Within 10 miles contains significant variations in elevation (1,539 feet). Within 50 miles contains very significant variations in elevation (13,173 feet).
The area within 2 miles of Port Moresby is covered by artificial surfaces (90%), within 10 miles by water (43%) and trees (18%), and within 50 miles by water (54%) and trees (37%).
This report illustrates the typical weather in Port Moresby 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 is only a single weather station, Jacksons International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Port Moresby.
At a distance of 4 kilometers from Port Moresby, 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 Moresby 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 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.