Frankston weather in September

In September, Frankston sees average daytime highs of 14°C and overnight lows near 10°C, with 72 mm of rain across 12.6 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 14°C through the month. The sky is clear or mostly clear about 22% 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 Frankston's 9th-clearest and 3rd-windiest month. For the whole year in context, see Frankston's year-round climate.

Daytime high: 14°; 9th warmest
Overnight low: 10°; 3rd coldest
Rainfall: 72 mm; 12.6 wet days
Daylight: 11 h 48 min; 7:21 AM – 7:07 PM
Cloud cover: 61%; 9th clearest
Wind: 21 km/h; 3rd windiest
Solar energy: 4.04 kWh/m²
Travel score: 4.0; out of 10

Frankston is city in Victoria, Australia.

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

← August Frankston 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

Day-to-day highs hold fairly steady near 14°C through the month.

A typical September day in Frankston reaches about 14°C in the afternoon and slips back to 10°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 18°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°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)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15
Avg low (°C)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11

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

Frankston weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	22° / 16°	50	6.4	14.3	7.3
Feb	22° / 17°	46	5.8	13.5	7.3
Mar	21° / 16°	43	7.3	12.3	6.9
Apr	18° / 14°	59	8.8	11	6.0
May	15° / 12°	68	11.2	10	4.6
Jun	13° / 10°	70	11.8	9.4	3.6
Jul	12° / 9°	62	12.6	9.6	3.2
Aug	13° / 9°	71	13	10.5	3.4
Sep	14° / 10°	72	12.6	11.7	4.0
Oct	16° / 11°	67	11.1	13	4.9
Nov	18° / 13°	64	9.1	14.1	5.9
Dec	20° / 15°	59	8.8	14.6	6.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 55%.

	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	50	49	49	49	47	47	47	46	45	44	44	44	43	43	43	43	43	43	42	42	43	43	44	44	44	46	46	46
Cloudier (%)	50	50	50	51	51	51	53	53	53	54	55	56	56	56	57	57	57	57	57	57	58	58	57	57	56	56	56	54	54	54

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	49	51
7	47	53
8	47	53
9	47	53
10	46	54
11	45	55
12	44	56
13	44	56
14	44	56
15	43	57
16	43	57
17	43	57
18	43	57
19	43	57
20	43	57
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	44	56
28	46	54
29	46	54
30	46	54

Chance of precipitation in September

Any precipitation

Frankston gets around 72 mm of rain over 12.6 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 45% on the wettest days.

	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 (%)	37	38	39	40	41	41	42	43	43	44	44	45	45	44	44	44	43	43	42	42	41	41	40	40	39	39	39	39	39	39

	Rain chance (%)
1	37
2	38
3	39
4	40
5	41
6	41
7	42
8	43
9	43
10	44
11	44
12	45
13	45
14	44
15	44
16	44
17	43
18	43
19	42
20	42
21	41
22	41
23	40
24	40
25	39
26	39
27	39
28	39
29	39
30	39

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	100	100	100	100	100	100	100	100	100	100

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

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 21 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)	20	20	20	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

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 7:45 AM to 6:58 AM, and sunset from 6:53 PM to 7:19 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)	11.1	11.2	11.2	11.3	11.3	11.3	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.3	12.3	12.3
Sunrise (AM)	7:45	7:44	7:42	7:40	7:39	7:37	7:36	7:34	7:33	7:31	7:29	7:28	7:26	7:24	7:23	7:21	7:19	7:18	7:16	7:15	7:13	7:11	7:10	7:08	7:06	7:05	7:03	7:02	7:00	6:58
Sunset (PM)	6:53	6:54	6:55	6:56	6:57	6:58	6:59	6:59	7:00	7:01	7:02	7:03	7:04	7:05	7:06	7:07	7:07	7:08	7:09	7:10	7:11	7:12	7:13	7:14	7:15	7:16	7:16	7:17	7:18	7:19

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.1	7:45	6:53
2	11.2	7:44	6:54
3	11.2	7:42	6:55
4	11.3	7:40	6:56
5	11.3	7:39	6:57
6	11.3	7:37	6:58
7	11.4	7:36	6:59
8	11.4	7:34	6:59
9	11.5	7:33	7:00
10	11.5	7:31	7:01
11	11.5	7:29	7:02
12	11.6	7:28	7:03
13	11.6	7:26	7:04
14	11.7	7:24	7:05
15	11.7	7:23	7:06
16	11.8	7:21	7:07
17	11.8	7:19	7:07
18	11.8	7:18	7:08
19	11.9	7:16	7:09
20	11.9	7:15	7:10
21	12.0	7:13	7:11
22	12.0	7:11	7:12
23	12.1	7:10	7:13
24	12.1	7:08	7:14
25	12.1	7:06	7:15
26	12.2	7:05	7:16
27	12.2	7:03	7:16
28	12.3	7:02	7:17
29	12.3	7:00	7:18
30	12.3	6:58	7:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.04 kWh/m².

For context, solar energy here swings from a low near 1.83 kWh/m² to a high of 7.29 kWh/m² in January across the year — September's 4.04 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)	3.5	3.5	3.6	3.6	3.6	3.7	3.7	3.7	3.8	3.8	3.8	3.9	3.9	3.9	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.7	4.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.5	Moderate
2	3.5	Moderate
3	3.6	Moderate
4	3.6	Moderate
5	3.6	Moderate
6	3.7	Moderate
7	3.7	Moderate
8	3.7	Moderate
9	3.8	Moderate
10	3.8	Moderate
11	3.8	Moderate
12	3.9	Moderate
13	3.9	Moderate
14	3.9	Moderate
15	4.0	Moderate
16	4.0	Bright
17	4.1	Bright
18	4.1	Bright
19	4.2	Bright
20	4.2	Bright
21	4.3	Bright
22	4.3	Bright
23	4.4	Bright
24	4.4	Bright
25	4.5	Bright
26	4.5	Bright
27	4.6	Bright
28	4.6	Bright
29	4.7	Bright
30	4.7	Bright

Planning a trip in September

Is September a good time to visit Frankston?

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

4.0

Sightseeing

9th-best month of the year

0.0

Beach & pool

9th-best month of the year

September is a reasonable time to visit Frankston for sightseeing.

What to pack for Frankston in September

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

In September, Frankston sees daytime highs around 14°C and nights near 10°C. Worth packing: a warm layer, rain gear and a windbreaker. About 13 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Frankston in September

The nearest coast averages about 12°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 21°C and coldest in August near 11°C.

It's comfortable for a long swim from Jan 18 to Mar 11 — about 1.7 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	20	21	20	18	15	13	12	11	12	14	17	18
Comfort	Refreshing	Refreshing	Cool	Cool	Cool	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	20	Refreshing
Feb	21	Refreshing
Mar	20	Cool
Apr	18	Cool
May	15	Cool
Jun	13	Bracing
Jul	12	Bracing
Aug	11	Bracing
Sep	12	Bracing
Oct	14	Bracing
Nov	17	Cool
Dec	18	Cool

UV index in Frankston 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 Frankston peaks around December 19 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	10	8	5	3	2	2	3	4	7	10	12
Level	Extreme	Extreme	Very high	Moderate	Moderate	Low	Moderate	Moderate	Moderate	Very high	Very high	Extreme

	UV index (midday)	Level
Jan	11	Extreme
Feb	10	Extreme
Mar	8	Very high
Apr	5	Moderate
May	3	Moderate
Jun	2	Low
Jul	2	Moderate
Aug	3	Moderate
Sep	4	Moderate
Oct	7	Very high
Nov	10	Very high
Dec	12	Extreme

Location & terrain

Where is Frankston?

Frankston sits at 38.1°S, 145.1°E, 15 m above sea level, in Australia. The nearest listed city is Frankston East, 2.0 km away.

Topography around Frankston

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

Within 3 km, the terrain around Frankston has only modest variations in elevation — a maximum elevation change of 108 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,302 m.

The land around Frankston is covered by water (35%), artificial surfaces (30%) and trees (25%) within 3 km, water (38%) and grassland (24%) within 16 km, and water (34%), grassland (30%) and trees (22%) within 80 km.

3 km

108 m

water 35%

16 km

162 m

water 38%

80 km

1,302 m

water 34%

treesgrasslandcroplandartificial surfaceswaterwetland

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

September weather nearby: Frankston East 2.0 km · Frankston South 3.0 km · Langwarrin 5.0 km · Seaford 5.0 km · Mount Eliza 6.0 km · Carrum Downs 7.0 km · Mornington 11 km · Cranbourne West 14 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 Frankston (-38.1446°, 145.1229°, elevation 15 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. 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	14	10
2	14	10
3	14	10
4	14	10
5	14	10
6	14	10
7	14	10
8	14	10
9	14	10
10	14	10
11	14	10
12	14	10
13	14	10
14	14	10
15	14	10
16	14	10
17	14	10
18	14	10
19	15	10
20	15	10
21	15	10
22	15	10
23	15	10
24	15	11
25	15	11
26	15	11
27	15	11
28	15	11
29	15	11
30	15	11

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	49	51
7	47	53
8	47	53
9	47	53
10	46	54
11	45	55
12	44	56
13	44	56
14	44	56
15	43	57
16	43	57
17	43	57
18	43	57
19	43	57
20	43	57
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	44	56
28	46	54
29	46	54
30	46	54

	Rain chance (%)
1	37
2	38
3	39
4	40
5	41
6	41
7	42
8	43
9	43
10	44
11	44
12	45
13	45
14	44
15	44
16	44
17	43
18	43
19	42
20	42
21	41
22	41
23	40
24	40
25	39
26	39
27	39
28	39
29	39
30	39

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

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

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	49	51
7	47	53
8	47	53
9	47	53
10	46	54
11	45	55
12	44	56
13	44	56
14	44	56
15	43	57
16	43	57
17	43	57
18	43	57
19	43	57
20	43	57
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	44	56
28	46	54
29	46	54
30	46	54

	Rain chance (%)
1	37
2	38
3	39
4	40
5	41
6	41
7	42
8	43
9	43
10	44
11	44
12	45
13	45
14	44
15	44
16	44
17	43
18	43
19	42
20	42
21	41
22	41
23	40
24	40
25	39
26	39
27	39
28	39
29	39
30	39

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

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

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	49	51
7	47	53
8	47	53
9	47	53
10	46	54
11	45	55
12	44	56
13	44	56
14	44	56
15	43	57
16	43	57
17	43	57
18	43	57
19	43	57
20	43	57
21	42	58
22	42	58
23	43	57
24	43	57
25	44	56
26	44	56
27	44	56
28	46	54
29	46	54
30	46	54

	Rain chance (%)
1	37
2	38
3	39
4	40
5	41
6	41
7	42
8	43
9	43
10	44
11	44
12	45
13	45
14	44
15	44
16	44
17	43
18	43
19	42
20	42
21	41
22	41
23	40
24	40
25	39
26	39
27	39
28	39
29	39
30	39

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