Sydney · Australia

Sydney in September: every year compared

In September, Sydney averages highs of 21.4 °C and lows of 9.6 °C, with 39 mm of precipitation. The warmest September was 2013 (17.4 °C), the coldest 1969 (12.7 °C).

Avg. highAvg. high 21.4 °C

Avg. lowAvg. low 9.6 °C

PrecipitationPrecipitation 39 mm

Rainy daysRainy days 6

Day by day through September

Normal high and low for each day of September in Sydney.

Normal high and low, day by dayNormal 1991–2020

Every September in Sydney, ranked

86 months of September since 1940. The last one, 2025, ranks 7 of 86 (+1.0 °C vs normal).

194019832025

2025 · 16.4 °C · +1.0 °C vs normal · rank 7 of 86

Warmest years

1201317.4 °C
2198017.1 °C
3200916.6 °C
4202316.6 °C
5196516.5 °C

Coldest years

1196912.7 °C
2197412.8 °C
3197012.8 °C
4195813.0 °C
5195613.0 °C

All 86 years in a table

Year	Mean temperature	Daytime highs	Night lows	Precipitation	Hot days (30 °C+)	Rainy days
2025	16.4 °C	23.3 °C	10.0 °C	58 mm	0 days	6 days
2024	16.3 °C	23.3 °C	9.8 °C	33 mm	0 days	6 days
2023	16.6 °C	24.5 °C	9.2 °C	13 mm	5 days	4 days
2022	14.8 °C	19.4 °C	10.7 °C	90 mm	0 days	15 days
2021	15.5 °C	22.4 °C	9.2 °C	32 mm	1 day	9 days
2020	16.0 °C	22.0 °C	10.5 °C	36 mm	1 day	6 days
2019	15.3 °C	21.8 °C	9.6 °C	59 mm	0 days	3 days
2018	15.0 °C	21.2 °C	9.0 °C	40 mm	3 days	9 days
2017	16.4 °C	24.1 °C	8.9 °C	1 mm	4 days	1 day
2016	15.5 °C	20.4 °C	10.7 °C	66 mm	0 days	11 days
2015	14.7 °C	20.2 °C	9.5 °C	25 mm	0 days	7 days
2014	15.4 °C	21.1 °C	10.2 °C	27 mm	2 days	7 days
2013	17.4 °C	24.5 °C	10.8 °C	29 mm	6 days	6 days
2012	15.4 °C	22.4 °C	8.8 °C	16 mm	1 day	6 days
2011	15.2 °C	21.1 °C	9.5 °C	93 mm	1 day	8 days
2010	14.9 °C	20.5 °C	9.7 °C	38 mm	0 days	7 days
2009	16.6 °C	22.9 °C	10.4 °C	15 mm	4 days	5 days
2008	15.4 °C	21.4 °C	9.6 °C	66 mm	3 days	5 days
2007	15.1 °C	20.5 °C	9.8 °C	16 mm	0 days	5 days
2006	16.4 °C	22.5 °C	10.6 °C	72 mm	2 days	6 days
2005	15.0 °C	20.4 °C	9.7 °C	42 mm	0 days	9 days
2004	15.2 °C	21.3 °C	9.5 °C	49 mm	1 day	10 days
2003	15.7 °C	21.9 °C	9.4 °C	8 mm	2 days	1 day
2002	15.9 °C	22.9 °C	8.9 °C	21 mm	1 day	4 days
2001	15.8 °C	22.0 °C	9.9 °C	19 mm	0 days	7 days
2000	16.1 °C	23.2 °C	9.9 °C	24 mm	1 day	5 days
1999	15.2 °C	20.8 °C	9.7 °C	36 mm	0 days	7 days
1998	16.1 °C	21.7 °C	10.6 °C	21 mm	2 days	5 days
1997	14.6 °C	19.3 °C	10.0 °C	59 mm	0 days	9 days
1996	15.7 °C	21.5 °C	10.2 °C	30 mm	2 days	4 days
1995	14.1 °C	19.2 °C	9.4 °C	148 mm	0 days	10 days
1994	14.6 °C	22.2 °C	7.5 °C	13 mm	1 day	3 days
1993	14.4 °C	19.7 °C	9.1 °C	54 mm	0 days	7 days
1992	13.8 °C	19.9 °C	8.0 °C	27 mm	0 days	7 days
1991	14.4 °C	20.8 °C	8.2 °C	10 mm	0 days	3 days
1990	13.5 °C	18.9 °C	8.3 °C	46 mm	0 days	8 days
1989	14.7 °C	21.4 °C	8.0 °C	4 mm	2 days	1 day
1988	15.6 °C	21.3 °C	10.7 °C	95 mm	0 days	9 days
1987	14.6 °C	21.9 °C	8.3 °C	18 mm	2 days	2 days
1986	14.9 °C	20.9 °C	9.6 °C	59 mm	1 day	7 days
1985	13.8 °C	19.5 °C	8.8 °C	49 mm	0 days	8 days
1984	13.6 °C	19.5 °C	8.4 °C	29 mm	0 days	7 days
1983	16.1 °C	22.5 °C	10.5 °C	26 mm	2 days	7 days
1982	14.6 °C	20.9 °C	9.3 °C	101 mm	1 day	9 days
1981	16.5 °C	23.7 °C	10.2 °C	4 mm	4 days	1 day
1980	17.1 °C	25.6 °C	9.1 °C	1 mm	5 days	0 days
1979	14.8 °C	20.7 °C	9.4 °C	30 mm	0 days	5 days
1978	13.7 °C	18.8 °C	8.9 °C	63 mm	0 days	12 days
1977	13.3 °C	18.7 °C	8.5 °C	59 mm	0 days	10 days
1976	13.5 °C	18.9 °C	8.8 °C	54 mm	0 days	11 days
1975	14.5 °C	19.6 °C	10.0 °C	67 mm	0 days	12 days
1974	12.8 °C	18.4 °C	7.7 °C	17 mm	0 days	4 days
1973	15.3 °C	21.1 °C	9.8 °C	22 mm	1 day	6 days
1972	15.7 °C	22.8 °C	9.7 °C	18 mm	0 days	8 days
1971	14.9 °C	21.2 °C	9.4 °C	18 mm	0 days	6 days
1970	12.8 °C	18.1 °C	7.9 °C	88 mm	0 days	11 days
1969	12.7 °C	18.0 °C	8.0 °C	38 mm	0 days	9 days
1968	14.6 °C	21.0 °C	8.4 °C	2 mm	0 days	0 days
1967	13.7 °C	19.2 °C	8.7 °C	68 mm	0 days	7 days
1966	13.9 °C	19.2 °C	8.9 °C	43 mm	0 days	14 days
1965	16.5 °C	22.5 °C	11.1 °C	39 mm	4 days	8 days
1964	15.2 °C	20.7 °C	9.7 °C	35 mm	0 days	6 days
1963	13.9 °C	19.6 °C	8.7 °C	58 mm	0 days	7 days
1962	14.4 °C	20.1 °C	9.2 °C	49 mm	0 days	5 days
1961	14.2 °C	19.6 °C	9.3 °C	13 mm	1 day	5 days
1960	14.4 °C	19.6 °C	9.5 °C	27 mm	0 days	6 days
1959	14.0 °C	19.2 °C	9.5 °C	33 mm	0 days	8 days
1958	13.0 °C	18.3 °C	8.4 °C	36 mm	0 days	9 days
1957	14.2 °C	20.3 °C	8.3 °C	7 mm	0 days	2 days
1956	13.0 °C	18.9 °C	7.4 °C	13 mm	0 days	4 days
1955	14.9 °C	20.8 °C	8.8 °C	12 mm	1 day	3 days
1954	13.6 °C	19.2 °C	8.1 °C	14 mm	0 days	4 days
1953	15.1 °C	21.4 °C	9.1 °C	16 mm	1 day	4 days
1952	14.6 °C	21.4 °C	8.0 °C	6 mm	1 day	2 days
1951	15.4 °C	22.0 °C	9.4 °C	65 mm	1 day	8 days
1950	14.8 °C	20.6 °C	9.4 °C	25 mm	0 days	8 days
1949	14.3 °C	18.8 °C	10.0 °C	98 mm	0 days	10 days
1948	14.7 °C	20.0 °C	9.7 °C	42 mm	0 days	7 days
1947	13.8 °C	19.5 °C	8.3 °C	28 mm	0 days	5 days
1946	13.4 °C	19.3 °C	8.0 °C	26 mm	2 days	4 days
1945	14.6 °C	21.7 °C	8.2 °C	8 mm	0 days	3 days
1944	13.6 °C	19.0 °C	8.7 °C	43 mm	0 days	10 days
1943	14.0 °C	20.1 °C	8.9 °C	19 mm	0 days	6 days
1942	14.3 °C	20.6 °C	8.2 °C	6 mm	0 days	4 days
1941	14.9 °C	20.2 °C	10.2 °C	40 mm	0 days	11 days
1940	14.6 °C	20.1 °C	10.1 °C	56 mm	0 days	9 days

September records

Hottest day

36.6 °C

September 30, 1980 estimate

Nearby station: 35.9 °C on September 19, 2023 measured

Coldest night

1.9 °C

September 14, 1992 estimate

Nearby station: 2.3 °C on September 1, 1967 measured

Wettest day

95 mm

September 25, 1995 estimate

The weather on your birthday in Sydney

Any day since 1940: high, low, rain, snow, and how warm it was compared with the same date in every other year.

Questions & answers

How warm is Sydney in September?

Highs average 21.4 °C and lows 9.6 °C. A typical September brings 1 hot days (30 °C or more) and 0 frost days.

Does it rain a lot in Sydney in September?

About 39 mm falls in September, over some 6 days with at least 1 mm. The wettest September was 1995 (148 mm), the driest 1980 (1 mm).

What was the warmest September in Sydney?

2013, with a mean temperature of 17.4 °C. The coldest was 1969 (12.7 °C). The last one, 2025, ranks 7 of 86.