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September Weather in Brighton Australia

Daily high temperatures increase by 5°F, from 62°F to 67°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 42°F or exceeding 58°F.

For reference, on February 12, the hottest day of the year, temperatures in Brighton typically range from 63°F to 82°F, while on July 27, the coldest day of the year, they range from 47°F to 59°F.

Average High and Low Temperature in September in Brighton

Average High and Low Temperature in September in BrightonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303040°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAugOctSep 162°FSep 162°F49°F49°FSep 3067°FSep 3067°F53°F53°FSep 1164°FSep 1164°F50°F50°FSep 2165°FSep 2165°F51°F51°F
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 Brighton

Average Hourly Temperature in September in BrightonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctcoldcoldcoolcomfortable
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.

Montevideo, Uruguay (7,522 miles away) is the far-away foreign place with temperatures most similar to Brighton (view comparison).

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The month of September in Brighton experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 29% throughout the month.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 72% 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%.

Cloud Cover Categories in September in Brighton

Cloud Cover Categories in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 172%Sep 172%Sep 3071%Sep 3071%Sep 1172%Sep 1172%Sep 2171%Sep 2171%clearmostly clearpartly cloudymostly cloudyovercast
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 Brighton, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 26% and ending it at 17%.

For reference, the year's highest daily chance of a wet day is 32% on July 1, and its lowest chance is 5% on February 11.

Probability of Precipitation in September in Brighton

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 Brighton is gradually decreasing, starting the month at 1.7 inches, when it rarely exceeds 3.3 inches or falls below 0.5 inches, and ending the month at 1.3 inches, when it rarely exceeds 2.7 inches or falls below 0.3 inches.

Average Monthly Rainfall in September in Brighton

Average Monthly Rainfall in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inAugOctSep 11.7 inSep 11.7 inSep 301.3 inSep 301.3 inSep 111.6 inSep 111.6 inSep 211.5 inSep 211.5 in
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 Brighton, 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, 2 minutes, implying an average daily increase of 2 minutes, 9 seconds, and weekly increase of 15 minutes, 4 seconds.

The shortest day of the month is September 1, with 11 hours, 22 minutes of daylight and the longest day is September 30, with 12 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in September in Brighton

Hours of Daylight and Twilight in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 mindaydaydaydaynightSep 111 hr, 22 minSep 111 hr, 22 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 Brighton is 6:35 AM on September 1 and the earliest sunrise is 41 minutes earlier at 5:53 AM on September 30.

The earliest sunset is 5:57 PM on September 1 and the latest sunset is 21 minutes later at 6:18 PM on September 30.

Daylight saving time is observed in Brighton during 2024, but it neither starts nor ends during September, so the entire month 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.

Sunrise & Sunset with Twilight and Daylight Saving Time in September in Brighton

Sunrise & Sunset with Twilight and Daylight Saving Time in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct5:53 AM5:53 AMSep 306:18 PMSep 306:18 PM6:35 AM6:35 AMSep 15:57 PMSep 15:57 PM6:21 AM6:21 AMSep 116:04 PMSep 116:04 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 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.

Solar Elevation and Azimuth in September in Brighton

Solar Elevation and Azimuth in September in BrightonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct001010202020303040405050600001010202030303040405060
northeastsouthwest
Solar elevation and azimuth over the course of September 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

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

Moon Rise, Set & Phases in September in Brighton

Moon Rise, Set & Phases in September in BrightonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 48:44 PMAug 48:44 PMAug 203:56 AMAug 203:56 AMSep 311:26 AMSep 311:26 AMSep 1812:05 PMSep 1812:05 PMOct 34:20 AMOct 34:20 AMOct 179:57 PMOct 179:57 PM7:10 AM7:10 AM5:15 PM5:15 PM5:06 PM5:06 PM7:13 AM7:13 AM6:41 AM6:41 AM6:07 PM6:07 PM5:08 PM5:08 PM6:11 AM6:11 AM5:53 AM5:53 AM6:49 PM6:49 PM7:22 PM7:22 PM6:38 AM6:38 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.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
4%5:45 AMENE4:09 PMWNW-10:57 AMN248,142 mi
2
1%6:15 AMENE5:09 PMWNW-11:42 AMN249,748 mi
3
0%6:41 AMENE6:07 PMW-12:23 PMN251,011 mi
4
1%7:04 AME7:03 PMW-1:02 PMN251,898 mi
5
4%7:26 AME7:59 PMW-1:41 PMN252,358 mi
6
9%7:48 AME8:55 PMWSW-2:19 PMN252,320 mi
7
15%8:12 AMESE9:52 PMWSW-2:59 PMN251,710 mi
8
22%8:37 AMESE10:51 PMWSW-3:41 PMN250,457 mi
9
31%9:07 AMESE11:52 PMWSW-4:26 PMN248,518 mi
10
41%9:42 AMESE--5:15 PMN245,888 mi
11
50%-12:54 AMWSW10:25 AMSE6:08 PMN242,627 mi
12
62%-1:55 AMSW11:17 AMSE7:05 PMN238,872 mi
13
72%-2:53 AMSW12:18 PMSE8:03 PMN234,847 mi
14
82%-3:44 AMWSW1:26 PMESE9:01 PMN230,854 mi
15
90%-4:29 AMWSW2:39 PMESE9:57 PMN227,248 mi
16
96%-5:07 AMWSW3:54 PMESE10:51 PMN224,387 mi
17
100%-5:41 AMWSW5:08 PME11:43 PMN222,576 mi
18
100%-6:11 AMW6:22 PME--
19
100%-6:41 AMW7:36 PME12:33 AMN222,010 mi
20
96%-7:12 AMWNW8:50 PMENE1:25 AMN222,736 mi
21
90%-7:45 AMWNW10:05 PMENE2:18 AMN224,646 mi
22
82%-8:22 AMWNW11:19 PMENE3:14 AMN227,501 mi
23
71%-9:06 AMWNW-4:12 AMN230,983 mi
24
60%12:30 AMNE9:57 AMNW-5:13 AMN234,748 mi
25
50%1:33 AMNE10:55 AMNW-6:14 AMN238,487 mi
26
38%2:27 AMNE11:56 AMNW-7:12 AMN241,956 mi
27
28%3:11 AMENE1:00 PMWNW-8:06 AMN244,996 mi
28
20%3:48 AMENE2:02 PMWNW-8:55 AMN247,525 mi
29
12%4:19 AMENE3:02 PMWNW-9:40 AMN249,516 mi
30
7%4:45 AMENE4:01 PMWNW-10:22 AMN250,986 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 Brighton 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 May 10, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Brighton

Humidity Comfort Levels in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 10%Sep 10%Sep 300%Sep 300%Sep 110%Sep 110%Sep 210%Sep 210%drydrycomfortablecomfortable
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 Brighton is essentially constant during September, remaining within 0.1 miles per hour of 11.1 miles per hour throughout.

For reference, on January 17, the windiest day of the year, the daily average wind speed is 12.5 miles per hour, while on April 30, the calmest day of the year, the daily average wind speed is 10.1 miles per hour.

The lowest daily average wind speed during September is 11.0 miles per hour on September 7.

Average Wind Speed in September in Brighton

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 Brighton throughout September is predominantly from the west, with a peak proportion of 39% on September 2.

Wind Direction in September in Brighton

Wind Direction in September in BrightonWSSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctwestsouthnortheast
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).

Brighton 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 Brighton is gradually increasing during September, rising by 2°F, from 56°F to 58°F, over the course of the month.

Average Water Temperature in September in Brighton

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 Brighton 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 Brighton

Time Spent in Various Temperature Bands and the Growing Season in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%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 16coldcoolcomfortablevery coldwarm
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 Brighton are increasing during September, increasing by 218°F, from 260°F to 478°F, over the course of the month.

Growing Degree Days in September in Brighton

Growing Degree Days in September in BrightonSep112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030200°F200°F250°F250°F300°F300°F350°F350°F400°F400°F450°F450°F500°F500°F550°F550°FAugOctSep 1260°FSep 1260°FSep 30478°FSep 30478°FSep 11324°FSep 11324°FSep 21400°FSep 21400°F
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 Brighton is increasing during September, rising by 1.5 kWh, from 4.1 kWh to 5.6 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Brighton

Average Daily Incident Shortwave Solar Energy in September in BrightonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 14.1 kWhSep 14.1 kWhSep 305.6 kWhSep 305.6 kWhSep 114.6 kWhSep 114.6 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 Brighton are -35.018 deg latitude, 138.524 deg longitude, and 52 ft elevation.

The topography within 2 miles of Brighton contains significant variations in elevation, with a maximum elevation change of 515 feet and an average elevation above sea level of 81 feet. Within 10 miles contains significant variations in elevation (1,985 feet). Within 50 miles also contains large variations in elevation (2,444 feet).

The area within 2 miles of Brighton is covered by artificial surfaces (52%), water (21%), and sparse vegetation (20%), within 10 miles by water (39%) and artificial surfaces (28%), and within 50 miles by water (43%) and cropland (36%).

This report illustrates the typical weather in Brighton, 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 Brighton.

At a distance of 8 kilometers from Brighton, 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 Brighton 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 © OpenStreetMap contributors.

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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