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Average Weather in August in Roxby Downs Australia

Daily high temperatures increase by 6°F, from 65°F to 70°F, rarely falling below 58°F or exceeding 81°F.

Daily low temperatures increase by 4°F, from 45°F to 49°F, rarely falling below 39°F or exceeding 57°F.

For reference, on January 12, the hottest day of the year, temperatures in Roxby Downs typically range from 71°F to 95°F, while on July 8, the coldest day of the year, they range from 44°F to 63°F.

Average High and Low Temperature in August

Average High and Low Temperature in August in Roxby Downs18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°FJulSepAug 165°FAug 165°F45°F45°FAug 3170°FAug 3170°F49°F49°FAug 1166°FAug 1166°F46°F46°FAug 2168°FAug 2168°F48°F48°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August

Average Hourly Temperature in August in Roxby Downs18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepNowNowcoldcoldcoolcomfortablewarm
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Wildwood, Texas, United States (9,420 miles away) and Thomasville, Georgia, United States (10,033 miles) are the far-away foreign places with temperatures most similar to Roxby Downs (view comparison).

Clouds

The month of August in Roxby Downs experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 13% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 12% on August 10.

The clearest day of the month is August 10, with clear, mostly clear, or partly cloudy conditions 88% of the time.

For reference, on November 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 30%, while on August 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.

Cloud Cover Categories in August

Cloud Cover Categories in August in Roxby Downs1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepNov 2270%Nov 2270%Aug 187%Aug 187%Aug 3186%Aug 3186%Aug 1188%Aug 1188%Aug 2187%Aug 2187%NowNowclearmostly clearovercastpartly cloudymostly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Roxby Downs, the chance of a wet day over the course of August is essentially constant, remaining around 6% throughout.

For reference, the year's highest daily chance of a wet day is 9% on June 2, and its lowest chance is 4% on April 10.

Probability of Precipitation in August

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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 August in Roxby Downs is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.0 inches or falling below -0.0 inches.

Average Monthly Rainfall in August

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of August in Roxby Downs, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 47 minutes, implying an average daily increase of 1 minute, 34 seconds, and weekly increase of 10 minutes, 56 seconds.

The shortest day of the month is August 1, with 10 hours, 40 minutes of daylight and the longest day is August 31, with 11 hours, 27 minutes of daylight.

Hours of Daylight and Twilight in August

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The latest sunrise of the month in Roxby Downs is 7:08 AM on August 1 and the earliest sunrise is 29 minutes earlier at 6:39 AM on August 31.

The earliest sunset is 5:48 PM on August 1 and the latest sunset is 18 minutes later at 6:06 PM on August 31.

Daylight saving time is observed in Roxby Downs during 2021, but it neither starts nor ends during August, so the entire month is in standard time.

For reference, on December 21, the longest day of the year, the Sun rises at 6:16 AM and sets 14 hours, 8 minutes later, at 8:24 PM, while on June 21, the shortest day of the year, it rises at 7:19 AM and sets 10 hours, 10 minutes later, at 5:29 PM.

Sunrise & Sunset with Twilight in August

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for August 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 August

Moon in Roxby Downs18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 1010:47 AMJul 1010:47 AMJul 2412:08 PMJul 2412:08 PMAug 811:21 PMAug 811:21 PMAug 229:33 PMAug 229:33 PMSep 710:22 AMSep 710:22 AMSep 219:25 AMSep 219:25 AM7:27 AM7:27 AM5:40 PM5:40 PM4:40 PM4:40 PM7:23 AM7:23 AM6:56 AM6:56 AM5:28 PM5:28 PM5:43 PM5:43 PM7:26 AM7:26 AM6:48 AM6:48 AM6:23 PM6:23 PM5:33 PM5:33 PM6:31 AM6:31 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

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 Roxby Downs is essentially constant during August, remaining around 0% throughout.

For reference, on January 24, the muggiest day of the year, there are muggy conditions 4% of the time, while on May 13, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August

Humidity Comfort Levels in August in Roxby Downs1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 10%Aug 10%Aug 310%Aug 310%Aug 110%Aug 110%Aug 210%Aug 210%drydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Roxby Downs is gradually increasing during August, increasing from 9.7 miles per hour to 10.6 miles per hour over the course of the month.

For reference, on November 27, the windiest day of the year, the daily average wind speed is 11.8 miles per hour, while on May 19, the calmest day of the year, the daily average wind speed is 8.6 miles per hour.

Average Wind Speed in August

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Roxby Downs during August is predominantly out of the north from August 1 to August 7 and the south from August 7 to August 31.

Wind Direction in August

Wind Direction in August in Roxby DownsNS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepNowNowwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Growing Season

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 Roxby Downs 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 August

Time Spent in Various Temperature Bands and the Growing Season in August in Roxby Downs1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 16100%Jul 3100%Jul 3NowNowvery coldcoldcoolcomfortablewarm
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 percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Roxby Downs are increasing during August, increasing by 235°F, from 152°F to 387°F, over the course of the month.

Growing Degree Days in August

The average growing degree days accumulated over the course of August, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 Roxby Downs is increasing during August, rising by 1.2 kWh, from 4.0 kWh to 5.2 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August

Average Daily Incident Shortwave Solar Energy in August in Roxby Downs1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhJulSepAug 14.0 kWhAug 14.0 kWhAug 315.2 kWhAug 315.2 kWhAug 114.4 kWhAug 114.4 kWhAug 214.8 kWhAug 214.8 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Roxby Downs are -30.563 deg latitude, 136.895 deg longitude, and 351 ft elevation.

The topography within 2 miles of Roxby Downs contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 359 feet. Within 10 miles also contains only modest variations in elevation (315 feet). Within 50 miles contains only modest variations in elevation (741 feet).

The area within 2 miles of Roxby Downs is covered by sparse vegetation (80%) and artificial surfaces (19%), within 10 miles by sparse vegetation (83%) and grassland (12%), and within 50 miles by sparse vegetation (77%) and grassland (13%).

Data Sources

This report illustrates the typical weather in Roxby Downs, 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, RAAF Woomera Airfield, in our network suitable to be used as a proxy for the historical temperature and dew point records of Roxby Downs.

At a distance of 65 kilometers from Roxby Downs, 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 Roxby Downs 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.

Other Data

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.

Disclaimer

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.