Average Weather in September in Hindmarsh Island Australia
Daily high temperatures increase by 4°F, from 62°F to 66°F, rarely falling below 56°F or exceeding 77°F.
Daily low temperatures increase by 4°F, from 49°F to 53°F, rarely falling below 43°F or exceeding 58°F.
For reference, on February 12, the hottest day of the year, temperatures in Hindmarsh Island typically range from 62°F to 79°F, while on July 23, the coldest day of the year, they range from 47°F to 59°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
Montevideo, Uruguay (7,484 miles away); Caldas da Rainha, Portugal (10,683 miles); and Cape Town, South Africa (6,297 miles) are the far-away foreign places with temperatures most similar to Hindmarsh Island (view comparison).
The month of September in Hindmarsh Island experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 30% throughout the month.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on May 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 44%, while on February 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hindmarsh Island, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 26% and ending it at 18%.
For reference, the year's highest daily chance of a wet day is 32% on July 2, and its lowest chance is 6% on February 11.
Probability of Precipitation in September
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 September in Hindmarsh Island is gradually decreasing, starting the month at 1.6 inches, when it rarely exceeds 3.1 inches or falls below 0.4 inches, and ending the month at 1.2 inches, when it rarely exceeds 2.6 inches or falls below 0.3 inches.
Average Monthly Rainfall in September
Over the course of September in Hindmarsh Island, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 4 minutes, implying an average daily increase of 2 minutes, 12 seconds, and weekly increase of 15 minutes, 21 seconds.
The shortest day of the month is September 1, with 11 hours, 20 minutes of daylight and the longest day is September 30, with 12 hours, 24 minutes of daylight.
Hours of Daylight and Twilight in September
The latest sunrise of the month in Hindmarsh Island is 6:34 AM on September 1 and the earliest sunrise is 42 minutes earlier at 5:53 AM on September 30.
The earliest sunset is 5:54 PM on September 1 and the latest sunset is 22 minutes later at 6:16 PM on September 30.
Daylight saving time is observed in Hindmarsh Island during 2018, but it neither starts nor ends during September, so the entire month is in standard time.
For reference, on December 21, the longest day of the year, the Sun rises at 5:55 AM and sets 14 hours, 34 minutes later, at 8:29 PM, while on June 21, the shortest day of the year, it rises at 7:23 AM and sets 9 hours, 45 minutes later, at 5:08 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
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 Hindmarsh Island is essentially constant during September, remaining around 0% throughout.
For reference, on February 25, the muggiest day of the year, there are muggy conditions 2% of the time, while on April 30, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
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 Hindmarsh Island is essentially constant during September, remaining within 0.2 miles per hour of 13.7 miles per hour throughout.
For reference, on January 17, the windiest day of the year, the daily average wind speed is 14.2 miles per hour, while on April 24, the calmest day of the year, the daily average wind speed is 11.6 miles per hour.
The lowest daily average wind speed during September is 13.5 miles per hour on September 8.
Average Wind Speed in September
Wind Direction in September
Hindmarsh Island 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 Hindmarsh Island is essentially constant during September, remaining within 1°F of 57°F throughout.
Average Water Temperature in September
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).
Temperatures in Hindmarsh Island are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in September
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 Hindmarsh Island are increasing during September, increasing by 217°F, from 264°F to 481°F, over the course of the month.
Growing Degree Days in September
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 Hindmarsh Island is increasing during September, rising by 1.4 kWh, from 4.0 kWh to 5.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Hindmarsh Island are -35.510 deg latitude, 138.868 deg longitude, and 10 ft elevation.
The topography within 2 miles of Hindmarsh Island contains only modest variations in elevation, with a maximum elevation change of 118 feet and an average elevation above sea level of 18 feet. Within 10 miles contains only modest variations in elevation (545 feet). Within 50 miles contains significant variations in elevation (2,382 feet).
The area within 2 miles of Hindmarsh Island is covered by sparse vegetation (46%), cropland (33%), and water (17%), within 10 miles by water (47%) and cropland (31%), and within 50 miles by water (49%) and cropland (26%).
This report illustrates the typical weather in Hindmarsh Island 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, Adelaide, in our network suitable to be used as a proxy for the historical temperature and dew point records of Hindmarsh Island.
At a distance of 69 kilometers from Hindmarsh Island, 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 Hindmarsh Island 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.
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.