Winter Weather in Adelaide Australia

Daily high temperatures are around 60°F, rarely falling below 54°F or exceeding 71°F. The lowest daily average high temperature is 58°F on July 17.

Daily low temperatures are around 46°F, rarely falling below 38°F or exceeding 55°F. The lowest daily average low temperature is 45°F on July 19.

For reference, on February 12, the hottest day of the year, temperatures in Adelaide typically range from 63°F to 83°F, while on July 19, the coldest day of the year, they range from 45°F to 58°F.

The figure below shows you a compact characterization of the hourly average winter temperatures. 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.

Pan de Azúcar, Uruguay (7,547 miles away) is the far-away foreign place with temperatures most similar to Adelaide (view comparison).

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The winter in Adelaide experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 41% to 28%. The lowest chance of overcast or mostly cloudy conditions is 27% on August 25.

The clearest day of the winter is August 25, with clear, mostly clear, or partly cloudy conditions 73% of the time.

For reference, on May 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on February 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Adelaide, the chance of a wet day over the course of the winter is essentially constant, remaining around 28% throughout.

For reference, the year's highest daily chance of a wet day is 31% on July 1, and its lowest chance is 5% on February 11.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Adelaide is essentially constant, remaining about 1.9 inches throughout, and rarely exceeding 3.5 inches or falling below 0.4 inches.

The highest average 31-day accumulation is 2.1 inches on June 22.

Over the course of the winter in Adelaide, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 23 minutes, implying an average daily increase of 55 seconds, and weekly increase of 6 minutes, 22 seconds.

The shortest day of the winter is June 21, with 9 hours, 48 minutes of daylight and the longest day is August 31, with 11 hours, 20 minutes of daylight.

The latest sunrise of the winter in Adelaide is 7:24 AM on June 29 and the earliest sunrise is 48 minutes earlier at 6:36 AM on August 31.

The earliest sunset is 5:10 PM on June 12 and the latest sunset is 46 minutes later at 5:56 PM on August 31.

Daylight saving time is observed in Adelaide during 2024, but it neither starts nor ends during the winter, so the entire season is in daylight saving time.

For reference, on December 21, the longest day of the year, the Sun rises at 5:58 AM and sets 14 hours, 31 minutes later, at 8:29 PM, while on June 20, the shortest day of the year, it rises at 7:23 AM and sets 9 hours, 48 minutes later, at 5:11 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the winter of 2024. 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.

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 Adelaide is essentially constant during the winter, remaining around 0% throughout.

For reference, on February 6, the muggiest day of the year, there are muggy conditions 2% of the time, while on May 7, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Adelaide is gradually increasing during the winter, increasing from 9.7 miles per hour to 10.3 miles per hour over the course of the season.

For reference, on January 17, the windiest day of the year, the daily average wind speed is 11.9 miles per hour, while on May 18, the calmest day of the year, the daily average wind speed is 9.4 miles per hour.

The highest daily average wind speed during the winter is 10.7 miles per hour on July 1.

The wind direction in Adelaide during the winter is predominantly out of the north from June 1 to July 18 and the west from July 18 to August 31.

Adelaide 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 Adelaide is decreasing during the winter, falling by 5°F, from 61°F to 56°F, over the course of the season.

The lowest average surface water temperature during the winter is 55°F on August 11.

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 Adelaide 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.

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 Adelaide are very rapidly decreasing during the winter, decreasing by 3,973°F, from 4,187°F to 214°F, over the course of the season.

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 Adelaide is rapidly increasing during the winter, rising by 1.7 kWh, from 2.4 kWh to 4.1 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.3 kWh on June 23.

For the purposes of this report, the geographical coordinates of Adelaide are -34.929 deg latitude, 138.599 deg longitude, and 194 ft elevation.

The topography within 2 miles of Adelaide contains only modest variations in elevation, with a maximum elevation change of 259 feet and an average elevation above sea level of 145 feet. Within 10 miles contains only modest variations in elevation (2,444 feet). Within 50 miles also contains large variations in elevation (2,444 feet).

The area within 2 miles of Adelaide is covered by artificial surfaces (64%) and sparse vegetation (17%), within 10 miles by artificial surfaces (38%) and trees (28%), and within 50 miles by cropland (40%) and water (37%).