Sydney Central Business District weather in September

In September, Sydney Central Business District sees average daytime highs of 19°C and overnight lows near 13°C, with 50 mm of rain across 6.7 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 20°C by the end. The sky is clear or mostly clear about 58% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Sydney Central Business District's 3rd-clearest and 5th-windiest month. For the whole year in context, see Sydney Central Business District's year-round climate.

Daytime high
19°
9th warmest
Overnight low
13°
4th coldest
Rainfall
50 mm
6.7 wet days
Daylight
11 h 48 min
6:56 AM – 6:43 PM
Cloud cover
37%
3rd clearest
Wind
18 km/h
5th windiest
Solar energy
4.91 kWh/m²
Travel score
6.9
out of 10

Sydney Central Business District is central business district of Sydney, New South Wales, Australia.

Density
9,162/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 20°C by the end.

A typical September day in Sydney Central Business District reaches about 19°C in the afternoon and slips back to 13°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 23°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11812
21812
31812
41813
51813
61813
71813
81813
91813
101813
111913
121913
131913
141913
151913
161913
171913
181913
191913
201914
211914
221914
231914
242014
252014
262014
272014
282014
292014
302014

Sydney Central Business District weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 20°729.3147.2
Feb24° / 20°9310.313.36.9
Mar23° / 19°8211.612.36.8
Apr21° / 17°7710.511.26.7
May19° / 14°799.710.36.4
Jun17° / 12°9710.39.85.6
Jul16° / 11°567.7105.8
Aug17° / 11°536.610.76.4
Sep19° / 13°506.711.86.9
Oct20° / 15°59812.96.8
Nov21° / 17°729.113.86.8
Dec23° / 19°608.614.27.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 25%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27426
37426
47426
57525
67624
77624
87624
97624
107723
117723
127723
137723
147822
157822
167822
177624
187624
197624
207624
217624
227624
237525
247426
257426
267327
277327
287228
297228
307129

Chance of precipitation in September

Any precipitation

Sydney Central Business District gets around 50 mm of rain over 6.7 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
526
626
725
825
924
1024
1123
1223
1323
1422
1522
1621
1721
1821
1921
2021
2120
2220
2320
2420
2520
2621
2721
2821
2922
3022

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19190
29190
390100
490100
590100
690100
790100
890100
990100
1090100
1189110
1289110
1388111
1487121
1586131
1686131
1785141
1884151
1983152
2082162
2182162
2281172
2380173
2479183
2579183
2678193
2776204
2875214
2974224
3074224

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over September. Sunrise moves from 7:17 AM to 6:36 AM, and sunset from 6:33 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:176:33
211.37:166:33
311.37:146:34
411.47:136:35
511.47:126:36
611.47:106:36
711.57:096:37
811.57:076:38
911.57:066:38
1011.67:046:39
1111.67:036:40
1211.67:026:40
1311.77:006:41
1411.76:596:42
1511.86:576:43
1611.86:566:43
1711.86:546:44
1811.96:536:45
1911.96:516:45
2011.96:506:46
2112.06:486:47
2212.06:476:48
2312.06:466:48
2412.16:446:49
2512.16:436:50
2612.26:416:50
2712.26:406:51
2812.26:386:52
2912.36:376:53
3012.36:366:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.91 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 6.64 kWh/m² in January across the year — September's 4.91 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.3Bright
34.3Bright
44.3Bright
54.4Bright
64.5Bright
74.5Bright
84.6Bright
94.6Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Sydney Central Business District

In seasonPeak

None of Sydney Central Business District's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Sydney Central Business District sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cyclone
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Sydney Central Business District?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.9
Sightseeing
3rd-best month of the year
2.9
Beach & pool
8th-best month of the year

September is a reasonable time to visit Sydney Central Business District for sightseeing.

What to pack for Sydney Central Business District in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Sydney Central Business District sees daytime highs around 19°C and nights near 13°C. Worth packing: sun protection. About 7 days see rain.

sun protection

Sea temperature near Sydney Central Business District in September

The nearest coast averages about 18°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in February at about 23°C and coldest in August near 18°C.

It's comfortable for a long swim from Nov 13 to Jun 7 — about 6.8 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr22Refreshing
May21Refreshing
Jun20Cool
Jul19Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov20Refreshing
Dec21Refreshing

UV index in Sydney Central Business District in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sydney Central Business District peaks around January 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 12Jun 18UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr6High
May4Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep5High
Oct8Very high
Nov10Very high
Dec12Extreme
Location & terrain

Where is Sydney Central Business District?

Sydney Central Business District sits at 33.9°S, 151.2°E, 76 m above sea level, in Australia. The nearest listed city is Sydney, 0.0 km away.

Topography around Sydney Central Business District

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sydney Central Business District.

Within 3 km, the terrain around Sydney Central Business District has only modest variations in elevation — a maximum elevation change of 99 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 221 m; within 80 km, large variations in elevation — a maximum elevation change of 1,054 m.

The land around Sydney Central Business District is covered by artificial surfaces (49%) and water (32%) within 3 km, water (36%), artificial surfaces (34%) and trees (25%) within 16 km, and trees (50%) and water (35%) within 80 km.

3 km
99 m
16 km
221 m
80 km
1,054 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Sydney 0.0 km · Surry Hills 2.0 km · Mosman 4.0 km · Kensington 6.0 km · Randwick 7.0 km · Marrickville 7.0 km · Kingsford 7.0 km · Mascot 7.0 km

Australia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 90% of US
price level, 2025
GDP per capita
$65,130
2025
Happiness
6.9 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2023
Road deaths
4.9
per 100k/yr, 2019
Income group
High
World Bank
Religion
none 38%Roman Catholic 20%Protestant 18%other Christian 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sydney Central Business District (-33.8648°, 151.2077°, elevation 76 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).