Average Weather in July at Geraldton (Greenstone Regional) Airport Canada
At Geraldton (Greenstone Regional) Airport, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 74°F throughout the month, rarely exceeding 83°F or dropping below 63°F. The highest daily average high temperature is 74°F on July 25.
Daily low temperatures increase by 2°F, from 52°F to 54°F, rarely falling below 42°F or exceeding 63°F. The highest daily average low temperature is 54°F on July 26.
For reference, on July 25, the hottest day of the year, temperatures at Geraldton (Greenstone Regional) Airport typically range from 54°F to 74°F, while on January 28, the coldest day of the year, they range from -10°F to 11°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 at Geraldton (Greenstone Regional) Airport experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 46% to 38%.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 62% of the time.
For reference, on February 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 83%, while on August 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 62%.
Cloud Cover in July
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Geraldton (Greenstone Regional) Airport, the chance of a wet day over the course of July is decreasing, starting the month at 36% and ending it at 32%.
For reference, the year's highest daily chance of a wet day is 38% on July 7, and its lowest chance is 10% on February 18.
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 at Geraldton (Greenstone Regional) Airport is gradually decreasing, starting the month at 3.1 inches, when it rarely exceeds 4.7 inches or falls below 1.7 inches, and ending the month at 2.9 inches, when it rarely exceeds 4.7 inches or falls below 1.3 inches.
The highest average 31-day accumulation is 3.1 inches on July 5.
Average Monthly Rainfall in July
Over the course of July at Geraldton (Greenstone Regional) Airport, 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, 2 minutes, implying an average daily decrease of 2 minutes, 3 seconds, and weekly decrease of 14 minutes, 22 seconds.
The shortest day of the month is July 31, with 15 hours, 13 minutes of daylight and the longest day is July 1, with 16 hours, 15 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month at Geraldton (Greenstone Regional) Airport is 5:44 AM on July 1 and the latest sunrise is 33 minutes later at 6:17 AM on July 31.
The latest sunset is 9:59 PM on July 1 and the earliest sunset is 29 minutes earlier at 9:30 PM on July 31.
Daylight saving time is observed at Geraldton (Greenstone Regional) Airport during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:39 AM and sets 16 hours, 20 minutes later, at 9:59 PM, while on December 21, the shortest day of the year, it rises at 8:42 AM and sets 8 hours, 6 minutes later, at 4:49 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 at Geraldton (Greenstone Regional) Airport is essentially constant during July, remaining within 1% of 3% throughout.
The highest chance of a muggy day during July is 4% on July 25.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 4% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% 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 at Geraldton (Greenstone Regional) Airport is essentially constant during July, remaining within 0.1 miles per hour of 2.5 miles per hour throughout.
For reference, on April 2, the windiest day of the year, the daily average wind speed is 3.1 miles per hour, while on July 25, the calmest day of the year, the daily average wind speed is 2.4 miles per hour.
The lowest daily average wind speed during July is 2.4 miles per hour on July 29.
Average Wind Speed in July
Wind Direction 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 at Geraldton (Greenstone Regional) Airport is essentially constant during July, remaining within 0.2 kWh of 6.2 kWh throughout.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Geraldton (Greenstone Regional) Airport are 49.778 deg latitude, -86.939 deg longitude, and 1,129 ft elevation.
The topography within 2 miles of Geraldton (Greenstone Regional) Airport is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 1,121 feet. Within 10 miles is essentially flat (420 feet). Within 50 miles contains only modest variations in elevation (1,083 feet).
The area within 2 miles of Geraldton (Greenstone Regional) Airport is covered by trees (81%) and herbaceous vegetation (12%), within 10 miles by trees (88%), and within 50 miles by trees (89%).
This report illustrates the typical weather at Geraldton (Greenstone Regional) Airport 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
Geraldton (Greenstone Regional) Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
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.