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September Weather in Brisbane Australia

Daily high temperatures increase by 4°F, from 72°F to 77°F, rarely falling below 68°F or exceeding 82°F.

Daily low temperatures increase by 5°F, from 53°F to 58°F, rarely falling below 46°F or exceeding 64°F.

For reference, on January 21, the hottest day of the year, temperatures in Brisbane typically range from 71°F to 84°F, while on July 29, the coldest day of the year, they range from 49°F to 69°F.

Average High and Low Temperature in September in Brisbane

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 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 in Brisbane

Average Hourly Temperature in September in Brisbane1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOctcoldcoolcoolcomfortablewarmcomfortablecold
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.

Porto Alegre, Brazil (8,162 miles away) is the far-away foreign place with temperatures most similar to Brisbane (view comparison).

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© Esri, et al.

Compare Brisbane to another city:

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The month of September in Brisbane 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 clearest day of the month is September 16, with clear, mostly clear, or partly cloudy conditions 88% of the time.

For reference, on December 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 32%, while on August 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.

Cloud Cover Categories in September in Brisbane

Cloud Cover Categories in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 186%Sep 186%Sep 3086%Sep 3086%Sep 1187%Sep 1187%Sep 2187%Sep 2187%clearmostly clearpartly cloudyovercastmostly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Brisbane, the chance of a wet day over the course of September is essentially constant, remaining around 17% throughout.

For reference, the year's highest daily chance of a wet day is 37% on February 11, and its lowest chance is 11% on July 30.

Probability of Precipitation in September in Brisbane

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 September in Brisbane is essentially constant, remaining about 1.6 inches throughout, and rarely exceeding 3.8 inches or falling below 0.1 inches.

Average Monthly Rainfall in September in Brisbane

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 snowfall.

Over the course of September in Brisbane, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 46 minutes, implying an average daily increase of 1 minute, 36 seconds, and weekly increase of 11 minutes, 9 seconds.

The shortest day of the month is September 1, with 11 hours, 33 minutes of daylight and the longest day is September 30, with 12 hours, 19 minutes of daylight.

Hours of Daylight and Twilight in September in Brisbane

Hours of Daylight and Twilight in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2312 hr, 6 minSep 2312 hr, 6 mindaydaydaydaynightSep 111 hr, 33 minSep 111 hr, 33 min
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 Brisbane is 6:01 AM on September 1 and the earliest sunrise is 33 minutes earlier at 5:28 AM on September 30.

The earliest sunset is 5:34 PM on September 1 and the latest sunset is 13 minutes later at 5:47 PM on September 30.

Daylight saving time is not observed in Brisbane during 2022.

For reference, on December 21, the longest day of the year, the Sun rises at 4:49 AM and sets 13 hours, 53 minutes later, at 6:42 PM, while on June 21, the shortest day of the year, it rises at 6:37 AM and sets 10 hours, 24 minutes later, at 5:01 PM.

Sunrise & Sunset with Twilight in September in Brisbane

Sunrise & Sunset with Twilight in September in Brisbane1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMAugOct5:28 AM5:28 AMSep 305:47 PMSep 305:47 PM6:01 AM6:01 AMSep 15:34 PMSep 15:34 PM5:50 AM5:50 AMSep 115:38 PMSep 115:38 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of September. 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.

The figure below presents a compact representation of key lunar data for September 2022. 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 September in Brisbane

Moon Rise, Set & Phases in September in Brisbane1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 1211:36 AMAug 1211:36 AMAug 276:18 PMAug 276:18 PMSep 108:00 PMSep 108:00 PMSep 267:55 AMSep 267:55 AMOct 106:56 AMOct 106:56 AMOct 258:49 PMOct 258:49 PM4:21 PM4:21 PM6:33 AM6:33 AM6:10 AM6:10 AM5:23 PM5:23 PM5:26 PM5:26 PM6:25 AM6:25 AM5:46 AM5:46 AM6:03 PM6:03 PM5:14 PM5:14 PM5:27 AM5:27 AM4:47 AM4:47 AM5:49 PM5:49 PM
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.
Sep 2022IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
24%8:48 AMESE10:09 PMWSW-3:26 PMN236,784 mi
2
34%9:24 AMESE11:12 PMWSW-4:15 PMN234,502 mi
3
45%10:05 AMESE--5:08 PMN232,277 mi
4
50%-12:17 AMWSW10:53 AMESE6:07 PMN230,206 mi
5
69%-1:24 AMWSW11:49 AMESE7:09 PMN228,436 mi
6
79%-2:29 AMWSW12:52 PMESE8:12 PMN227,145 mi
7
88%-3:29 AMWSW2:01 PMESE9:14 PMN226,520 mi
8
95%-4:22 AMWSW3:11 PMESE10:13 PMN226,708 mi
9
99%-5:08 AMWSW4:20 PMESE11:07 PMN227,786 mi
10
100%-5:48 AMWSW5:26 PME11:58 PMN229,730 mi
11
99%-6:25 AMW6:29 PME--
12
98%-6:58 AMW7:30 PME12:45 AMN232,414 mi
13
94%-7:31 AMW8:30 PMENE1:31 AMN235,623 mi
14
87%-8:04 AMWNW9:29 PMENE2:17 AMN239,089 mi
15
79%-8:38 AMWNW10:27 PMENE3:04 AMN242,522 mi
16
70%-9:16 AMWNW11:25 PMENE3:51 AMN245,646 mi
17
61%-9:57 AMWNW-4:41 AMN248,231 mi
18
50%12:22 AMENE10:43 AMWNW-5:32 AMN250,100 mi
19
41%1:16 AMENE11:32 AMWNW-6:24 AMN251,151 mi
20
32%2:06 AMENE12:25 PMWNW-7:16 AMN251,352 mi
21
23%2:51 AMENE1:21 PMWNW-8:06 AMN250,746 mi
22
15%3:33 AMENE2:17 PMWNW-8:55 AMN249,437 mi
23
9%4:10 AMENE3:14 PMWNW-9:42 AMN247,575 mi
24
4%4:44 AMENE4:10 PMWNW-10:27 AMN245,337 mi
25
1%5:15 AME5:07 PMW-11:10 AMN242,906 mi
26
0%5:46 AME6:03 PMW-11:53 AMN240,455 mi
27
2%6:17 AME7:02 PMW-12:37 PMN238,124 mi
28
6%6:49 AME8:02 PMWSW-1:23 PMN236,016 mi
29
12%7:24 AMESE9:05 PMWSW-2:12 PMN234,186 mi
30
20%8:04 AMESE10:11 PMWSW-3:04 PMN232,653 mi

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 Brisbane is gradually increasing during September, rising from 1% to 5% over the course of the month.

For reference, on February 4, the muggiest day of the year, there are muggy conditions 68% of the time, while on August 2, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Brisbane

Humidity Comfort Levels in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 11%Sep 11%Sep 305%Sep 305%Sep 111%Sep 111%Sep 213%Sep 213%muggymuggyhumidhumidcomfortablecomfortabledrydry
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.

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 Brisbane is essentially constant during September, remaining within 0.2 miles per hour of 8.9 miles per hour throughout.

For reference, on February 26, the windiest day of the year, the daily average wind speed is 10.1 miles per hour, while on April 29, the calmest day of the year, the daily average wind speed is 8.5 miles per hour.

Average Wind Speed in September in Brisbane

Average Wind Speed in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphAugOctSep 18.8 mphSep 18.8 mphSep 309.0 mphSep 309.0 mphSep 118.7 mphSep 118.7 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Brisbane throughout September is predominantly from the north, with a peak proportion of 37% on September 30.

Wind Direction in September in Brisbane

Wind Direction in September in BrisbaneSWNE181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctwestsoutheastnorth
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).

Brisbane 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 Brisbane is gradually increasing during September, rising by 2°F, from 69°F to 70°F, over the course of the month.

Average Water Temperature in September in Brisbane

Average Water Temperature in September in Brisbane1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303066°F66°F67°F67°F68°F68°F69°F69°F70°F70°F71°F71°F72°F72°F73°F73°F74°F74°F75°F75°FAugOctSep 169°FSep 169°FSep 3070°FSep 3070°FSep 1169°FSep 1169°FSep 2170°FSep 2170°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Brisbane 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 in Brisbane

Time Spent in Various Temperature Bands and the Growing Season in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16coldcoolcomfortablewarmvery cold
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 Brisbane are increasing during September, increasing by 430°F, from 582°F to 1,012°F, over the course of the month.

Growing Degree Days in September in Brisbane

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

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 Brisbane is increasing during September, rising by 1.1 kWh, from 5.2 kWh to 6.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Brisbane

Average Daily Incident Shortwave Solar Energy in September in Brisbane181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 15.2 kWhSep 15.2 kWhSep 306.3 kWhSep 306.3 kWhSep 115.7 kWhSep 115.7 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Brisbane are -27.468 deg latitude, 153.028 deg longitude, and 89 ft elevation.

The topography within 2 miles of Brisbane contains only modest variations in elevation, with a maximum elevation change of 240 feet and an average elevation above sea level of 61 feet. Within 10 miles contains only modest variations in elevation (1,427 feet). Within 50 miles contains very significant variations in elevation (2,930 feet).

The area within 2 miles of Brisbane is covered by artificial surfaces (53%) and sparse vegetation (32%), within 10 miles by artificial surfaces (49%) and trees (40%), and within 50 miles by trees (39%) and water (32%).

This report illustrates the typical weather in Brisbane, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Brisbane.

For each station, the records are corrected for the elevation difference between that station and Brisbane according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Brisbane is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Brisbane and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Brisbane and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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.

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