Mount Barker weather in September

In September, Mount Barker sees average daytime highs of 17°C and overnight lows near 8°C, with 55 mm of rain across 9.7 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 3rd-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 31% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Mount Barker's 8th-clearest and 1st-windiest month. For the whole year in context, see Mount Barker's year-round climate.

Daytime high: 17°; 8th warmest
Overnight low: 8°; 4th coldest
Rainfall: 55 mm; 9.7 wet days
Daylight: 11 h 48 min; 7:15 AM – 7:02 PM
Cloud cover: 55%; 8th clearest
Wind: 14 km/h; 1st windiest
Solar energy: 4.5 kWh/m²
Travel score: 5.5; out of 10

Mount Barker is city in South Australia.

Founded: 1839

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

← August Mount Barker year-round climate October →Best places to visit in September

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

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 Mount Barker reaches about 17°C in the afternoon and slips back to 8°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 23°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	16	16	16	16	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18
Avg low (°C)	7	7	7	7	7	7	7	7	7	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8

	Avg high (°C)	Avg low (°C)
1	16	7
2	16	7
3	16	7
4	16	7
5	16	7
6	16	7
7	16	7
8	16	7
9	16	7
10	16	8
11	16	8
12	16	8
13	17	8
14	17	8
15	17	8
16	17	8
17	17	8
18	17	8
19	17	8
20	17	8
21	17	8
22	17	8
23	17	8
24	18	8
25	18	8
26	18	8
27	18	8
28	18	8
29	18	8
30	18	8

Mount Barker weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 14°	21	3.5	14.1	7.8
Feb	27° / 15°	18	2.8	13.3	8.0
Mar	24° / 13°	18	3.4	12.3	8.1
Apr	21° / 11°	33	5.3	11.1	7.2
May	17° / 9°	44	8.4	10.2	5.5
Jun	14° / 7°	51	9.3	9.7	4.1
Jul	13° / 6°	56	10.4	9.9	3.7
Aug	14° / 7°	56	10.8	10.7	4.2
Sep	17° / 8°	55	9.7	11.8	5.5
Oct	20° / 9°	36	6.8	12.9	6.8
Nov	23° / 11°	34	6	13.8	7.5
Dec	25° / 13°	29	5.3	14.3	7.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	50	50	49	49	49	49	50	50	50	50	51	51	51	51	52	52	52	52	52	53	53	53	53	52	52	52	52	52	52	52
Cloudier (%)	50	50	51	51	51	51	50	50	50	50	49	49	49	49	48	48	48	48	48	47	47	47	47	48	48	48	48	48	48	48

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	49	51
4	49	51
5	49	51
6	49	51
7	50	50
8	50	50
9	50	50
10	50	50
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	52	48
17	52	48
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	53	47
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	52	48
30	52	48

Chance of precipitation in September

Any precipitation

Mount Barker gets around 55 mm of rain over 9.7 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 32% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	34	34	34	35	35	35	35	35	35	35	34	34	33	33	32	32	32	31	31	31	30	30	30	29	29	28	28	27	27	27

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	35
11	34
12	34
13	33
14	33
15	32
16	32
17	32
18	31
19	31
20	31
21	30
22	30
23	30
24	29
25	29
26	28
27	28
28	27
29	27
30	27

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99	99	99
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

Wind in September

Winds average 14 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	14	light breeze
11	14	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	14	light breeze
16	14	light breeze
17	14	light breeze
18	14	light breeze
19	14	light breeze
20	14	light breeze
21	14	light breeze
22	14	light breeze
23	14	light breeze
24	14	light breeze
25	14	light breeze
26	14	light breeze
27	14	light breeze
28	14	light breeze
29	14	light breeze
30	14	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 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 66 minutes over September. Sunrise moves from 7:37 AM to 6:55 AM, and sunset from 6:51 PM to 7:13 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.2	11.3	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.7	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3
Sunrise (AM)	7:37	7:36	7:35	7:33	7:32	7:30	7:29	7:27	7:26	7:24	7:23	7:21	7:20	7:18	7:17	7:15	7:14	7:12	7:11	7:09	7:08	7:06	7:05	7:03	7:02	7:00	6:59	6:57	6:56	6:55
Sunset (PM)	6:51	6:52	6:53	6:53	6:54	6:55	6:56	6:56	6:57	6:58	6:59	6:59	7:00	7:01	7:02	7:02	7:03	7:04	7:05	7:05	7:06	7:07	7:08	7:08	7:09	7:10	7:11	7:12	7:12	7:13

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.2	7:37	6:51
2	11.3	7:36	6:52
3	11.3	7:35	6:53
4	11.3	7:33	6:53
5	11.4	7:32	6:54
6	11.4	7:30	6:55
7	11.4	7:29	6:56
8	11.5	7:27	6:56
9	11.5	7:26	6:57
10	11.6	7:24	6:58
11	11.6	7:23	6:59
12	11.6	7:21	6:59
13	11.7	7:20	7:00
14	11.7	7:18	7:01
15	11.7	7:17	7:02
16	11.8	7:15	7:02
17	11.8	7:14	7:03
18	11.9	7:12	7:04
19	11.9	7:11	7:05
20	11.9	7:09	7:05
21	12.0	7:08	7:06
22	12.0	7:06	7:07
23	12.0	7:05	7:08
24	12.1	7:03	7:08
25	12.1	7:02	7:09
26	12.2	7:00	7:10
27	12.2	6:59	7:11
28	12.2	6:57	7:12
29	12.3	6:56	7:12
30	12.3	6:55	7:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.5 kWh/m².

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 7.84 kWh/m² in January across the year — September's 4.5 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	5.0	5.0	5.1	5.1	5.2	5.2
Level	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	4.0	Moderate
4	4.0	Moderate
5	4.0	Bright
6	4.1	Bright
7	4.1	Bright
8	4.2	Bright
9	4.2	Bright
10	4.3	Bright
11	4.3	Bright
12	4.3	Bright
13	4.4	Bright
14	4.4	Bright
15	4.5	Bright
16	4.5	Bright
17	4.6	Bright
18	4.6	Bright
19	4.7	Bright
20	4.7	Bright
21	4.8	Bright
22	4.8	Bright
23	4.9	Bright
24	4.9	Bright
25	5.0	Bright
26	5.0	Bright
27	5.1	Bright
28	5.1	Bright
29	5.2	Bright
30	5.2	Bright

Planning a trip in September

Hazard calendar for Mount Barker

In seasonPeak

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

Mount Barker 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 Mount Barker?

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

5.5

Sightseeing

8th-best month of the year

1.2

Beach & pool

8th-best month of the year

September is a reasonable time to visit Mount Barker for sightseeing.

What to pack for Mount Barker in September

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

In September, Mount Barker sees daytime highs around 17°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Mount Barker in September

The nearest coast averages about 14°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 45 km away) is warmest in February at about 21°C and coldest in August near 13°C.

It's comfortable for a long swim from Jan 3 to Mar 30 — about 2.9 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	21	21	21	19	17	15	14	13	14	15	17	19
Comfort	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Bracing	Bracing	Bracing	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	21	Refreshing
Feb	21	Refreshing
Mar	21	Refreshing
Apr	19	Cool
May	17	Cool
Jun	15	Cool
Jul	14	Bracing
Aug	13	Bracing
Sep	14	Bracing
Oct	15	Cool
Nov	17	Cool
Dec	19	Cool

UV index in Mount Barker in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mount Barker peaks around January 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	11	9	5	3	3	3	4	6	8	10	13
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	11	Extreme
Mar	9	Very high
Apr	5	High
May	3	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	8	Very high
Nov	10	Extreme
Dec	13	Extreme

Location & terrain

Where is Mount Barker?

Mount Barker sits at 35.1°S, 138.9°E, 322 m above sea level, in Australia. The nearest listed city is Adelaide Hills, 23 km away.

Topography around Mount Barker

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

Within 3 km, the terrain around Mount Barker has only modest variations in elevation — a maximum elevation change of 154 m around an average of 352 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 551 m; within 80 km, large variations in elevation — a maximum elevation change of 700 m.

The land around Mount Barker is covered by trees (42%), grassland (30%) and artificial surfaces (24%) within 3 km, grassland (59%) and trees (35%) within 16 km, and grassland (33%), water (29%) and cropland (22%) within 80 km.

3 km

154 m

trees 42%

16 km

551 m

grassland 59%

80 km

700 m

grassland 33%

treesshrubsgrasslandcroplandartificial surfaceswater

← August Mount Barker year-round climate October →Best places to visit in September

September weather nearby: Adelaide Hills 23 km · Adelaide city centre 28 km · Adelaide 29 km · Morphett Vale 33 km · Parafield Gardens 39 km · Paralowie 42 km · Gawler 53 km · Whyalla 256 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

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 Mount Barker (-35.0667°, 138.8667°, elevation 322 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).

	Avg high (°C)	Avg low (°C)
1	16	7
2	16	7
3	16	7
4	16	7
5	16	7
6	16	7
7	16	7
8	16	7
9	16	7
10	16	8
11	16	8
12	16	8
13	17	8
14	17	8
15	17	8
16	17	8
17	17	8
18	17	8
19	17	8
20	17	8
21	17	8
22	17	8
23	17	8
24	18	8
25	18	8
26	18	8
27	18	8
28	18	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	49	51
4	49	51
5	49	51
6	49	51
7	50	50
8	50	50
9	50	50
10	50	50
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	52	48
17	52	48
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	53	47
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	52	48
30	52	48

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	35
11	34
12	34
13	33
14	33
15	32
16	32
17	32
18	31
19	31
20	31
21	30
22	30
23	30
24	29
25	29
26	28
27	28
28	27
29	27
30	27

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

	Avg high (°C)	Avg low (°C)
1	16	7
2	16	7
3	16	7
4	16	7
5	16	7
6	16	7
7	16	7
8	16	7
9	16	7
10	16	8
11	16	8
12	16	8
13	17	8
14	17	8
15	17	8
16	17	8
17	17	8
18	17	8
19	17	8
20	17	8
21	17	8
22	17	8
23	17	8
24	18	8
25	18	8
26	18	8
27	18	8
28	18	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	49	51
4	49	51
5	49	51
6	49	51
7	50	50
8	50	50
9	50	50
10	50	50
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	52	48
17	52	48
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	53	47
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	52	48
30	52	48

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	35
11	34
12	34
13	33
14	33
15	32
16	32
17	32
18	31
19	31
20	31
21	30
22	30
23	30
24	29
25	29
26	28
27	28
28	27
29	27
30	27

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

	Avg high (°C)	Avg low (°C)
1	16	7
2	16	7
3	16	7
4	16	7
5	16	7
6	16	7
7	16	7
8	16	7
9	16	7
10	16	8
11	16	8
12	16	8
13	17	8
14	17	8
15	17	8
16	17	8
17	17	8
18	17	8
19	17	8
20	17	8
21	17	8
22	17	8
23	17	8
24	18	8
25	18	8
26	18	8
27	18	8
28	18	8
29	18	8
30	18	8

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	49	51
4	49	51
5	49	51
6	49	51
7	50	50
8	50	50
9	50	50
10	50	50
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	52	48
17	52	48
18	52	48
19	52	48
20	53	47
21	53	47
22	53	47
23	53	47
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	52	48
30	52	48

	Rain chance (%)
1	34
2	34
3	34
4	35
5	35
6	35
7	35
8	35
9	35
10	35
11	34
12	34
13	33
14	33
15	32
16	32
17	32
18	31
19	31
20	31
21	30
22	30
23	30
24	29
25	29
26	28
27	28
28	27
29	27
30	27

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1