Bairnsdale weather in September

In September, Bairnsdale sees average daytime highs of 17°C and overnight lows near 7°C, with 58 mm of rain across 9.9 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 18°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Bairnsdale's 7th-clearest and 2nd-windiest month. For the whole year in context, see Bairnsdale's year-round climate.

Daytime high
17°
8th warmest
Overnight low
4th coldest
Rainfall
58 mm
9.9 wet days
Daylight
11 h 48 min
7:11 AM – 6:57 PM
Cloud cover
57%
7th clearest
Wind
11 km/h
2nd windiest
Solar energy
4.26 kWh/m²
Travel score
5.5
out of 10

Bairnsdale is city in Victoria, Australia.

Founded
1859

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 16°C in the first days to 18°C by the end.

A typical September day in Bairnsdale reaches about 17°C in the afternoon and slips back to 7°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 22°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1166
2166
3166
4166
5167
6167
7167
8167
9177
10177
11177
12177
13177
14177
15177
16177
17177
18177
19177
20177
21187
22188
23188
24188
25188
26188
27188
28188
29188
30188

Bairnsdale weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 14°588.214.37.2
Feb25° / 14°627.513.57.2
Mar23° / 12°477.312.37.3
Apr20° / 10°547.211.16.7
May16° / 346.6105.6
Jun14° / 638.69.44.2
Jul13° / 448.19.64.1
Aug15° / 469.210.54.6
Sep17° / 589.911.75.5
Oct19° / 7010.7136.1
Nov21° / 10°8510.8146.4
Dec23° / 12°729.114.67.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35644
45644
55644
65545
75545
85545
95545
105545
115446
125446
135446
145446
155446
165446
175347
185446
195347
205347
215248
225347
235248
245248
255248
265248
275149
285248
295248
305248

Chance of precipitation in September

Any precipitation

Bairnsdale gets around 58 mm of rain over 9.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
231
331
432
532
632
733
833
933
1033
1133
1233
1333
1433
1533
1633
1733
1832
1932
2032
2132
2233
2333
2433
2533
2633
2733
2834
2934
3034

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 06 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 72 minutes over September. Sunrise moves from 7:35 AM to 6:49 AM, and sunset from 6:44 PM to 7:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:356:44
211.27:336:44
311.27:326:45
411.37:306:46
511.37:296:47
611.37:276:48
711.47:266:49
811.47:246:50
911.57:226:51
1011.57:216:51
1111.67:196:52
1211.67:186:53
1311.67:166:54
1411.77:146:55
1511.77:136:56
1611.87:116:57
1711.87:096:58
1811.87:086:58
1911.97:066:59
2011.97:057:00
2112.07:037:01
2212.07:017:02
2312.17:007:03
2412.16:587:04
2512.16:577:05
2612.26:557:06
2712.26:537:06
2812.36:527:07
2912.36:507:08
3012.36:497:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.26 kWh/m².

For context, solar energy here swings from a low near 1.97 kWh/m² to a high of 6.92 kWh/m² in January across the year — September's 4.26 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.9Moderate
63.9Moderate
73.9Moderate
84.0Moderate
94.0Moderate
104.0Bright
114.1Bright
124.1Bright
134.1Bright
144.2Bright
154.2Bright
164.3Bright
174.3Bright
184.3Bright
194.4Bright
204.4Bright
214.5Bright
224.5Bright
234.6Bright
244.6Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
Planning a trip in September

Hazard calendar for Bairnsdale

In seasonPeak

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

Bairnsdale 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 Bairnsdale?

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

5.5
Sightseeing
9th-best month of the year
1.3
Beach & pool
8th-best month of the year

September is a reasonable time to visit Bairnsdale for sightseeing.

What to pack for Bairnsdale in September

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

In September, Bairnsdale sees daytime highs around 17°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Bairnsdale in September

The nearest coast averages about 13°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 24 km away) is warmest in February at about 19°C and coldest in August near 12°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar18Cool
Apr17Cool
May16Cool
Jun14Bracing
Jul13Bracing
Aug12Bracing
Sep13Bracing
Oct14Bracing
Nov15Cool
Dec17Cool

UV index in Bairnsdale in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bairnsdale peaks around December 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 21UV 12Jun 18UV 2
UV index (midday)Level
Jan11Extreme
Feb10Very high
Mar8Very high
Apr5Moderate
May3Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep4Moderate
Oct8Very high
Nov9Very high
Dec12Extreme

Air quality in Bairnsdale in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Bairnsdale is worst in January — around 38 µg/m³ PM2.5 (poor), about 16.0× the cleanest month (June, 2 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodModerateJan 1038 µg/m³Jun 232 µg/m³
PM2.5 (µg/m³)Level
Jan38Poor
Feb10Good
Mar14Moderate
Apr12Moderate
May6Good
Jun2Good
Jul3Good
Aug3Good
Sep4Good
Oct11Good
Nov10Good
Dec36Poor
Location & terrain

Where is Bairnsdale?

Bairnsdale sits at 37.8°S, 147.6°E, 26 m above sea level, in Australia. The nearest listed city is Traralgon, 102 km away.

Topography around Bairnsdale

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bairnsdale.

Within 3 km, the terrain around Bairnsdale has only modest variations in elevation — a maximum elevation change of 72 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 479 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,640 m.

The land around Bairnsdale is covered by grassland (47%) and artificial surfaces (21%) within 3 km, grassland (57%) and trees (24%) within 16 km, and trees (51%) and water (25%) within 80 km.

3 km
72 m
16 km
479 m
80 km
1,640 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Traralgon 102 km · Warragul 152 km · Pakenham 189 km · Officer 195 km · Lilydale 199 km · Wangaratta 199 km · Berwick 200 km · Wodonga 200 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 Bairnsdale (-37.8229°, 147.6104°, elevation 26 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).