Sydney · Australia

Sydney in December: every year compared

In December, Sydney averages highs of 26.6 °C and lows of 16.9 °C, with 58 mm of precipitation. The warmest December was 2016 (23.8 °C), the coldest 1942 (18.6 °C).

Avg. highAvg. high 26.6 °C

Avg. lowAvg. low 16.9 °C

PrecipitationPrecipitation 58 mm

Rainy daysRainy days 9

Day by day through December

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

Normal high and low, day by dayNormal 1991–2020

Every December in Sydney, ranked

86 months of December since 1940. The last one, 2025, ranks 35 of 86 (±0.0 °C vs normal).

194019832025

2025 · 21.6 °C · ±0.0 °C vs normal · rank 35 of 86

Warmest years

1201623.8 °C
2202423.5 °C
3199023.4 °C
4201723.4 °C
5197923.3 °C

Coldest years

1194218.6 °C
2201118.8 °C
3194119.2 °C
4199519.4 °C
5196019.4 °C

All 86 years in a table

Year	Mean temperature	Daytime highs	Night lows	Precipitation	Hot days (30 °C+)	Rainy days
2025	21.6 °C	25.5 °C	17.8 °C	85 mm	5 days	10 days
2024	23.5 °C	29.4 °C	18.5 °C	14 mm	12 days	6 days
2023	23.1 °C	28.3 °C	18.5 °C	70 mm	8 days	12 days
2022	19.8 °C	24.9 °C	14.7 °C	24 mm	4 days	9 days
2021	20.9 °C	25.4 °C	16.8 °C	53 mm	5 days	10 days
2020	21.2 °C	25.6 °C	17.3 °C	115 mm	6 days	16 days
2019	22.7 °C	29.5 °C	17.1 °C	8 mm	13 days	5 days
2018	22.9 °C	28.5 °C	17.9 °C	46 mm	12 days	9 days
2017	23.4 °C	29.0 °C	18.7 °C	111 mm	13 days	10 days
2016	23.8 °C	29.3 °C	18.5 °C	51 mm	14 days	6 days
2015	21.8 °C	27.3 °C	16.5 °C	76 mm	7 days	10 days
2014	22.0 °C	26.6 °C	18.1 °C	124 mm	4 days	17 days
2013	22.0 °C	27.4 °C	16.5 °C	28 mm	7 days	7 days
2012	21.7 °C	26.9 °C	17.1 °C	17 mm	7 days	4 days
2011	18.8 °C	22.2 °C	15.4 °C	71 mm	0 days	13 days
2010	21.6 °C	26.1 °C	17.2 °C	54 mm	4 days	9 days
2009	22.2 °C	27.2 °C	17.6 °C	70 mm	7 days	8 days
2008	21.3 °C	26.7 °C	16.5 °C	75 mm	10 days	8 days
2007	20.9 °C	24.8 °C	17.1 °C	80 mm	1 day	15 days
2006	20.5 °C	25.5 °C	16.0 °C	76 mm	3 days	10 days
2005	23.0 °C	29.6 °C	17.0 °C	22 mm	13 days	2 days
2004	21.1 °C	26.1 °C	17.1 °C	60 mm	3 days	10 days
2003	21.7 °C	26.4 °C	17.4 °C	42 mm	7 days	8 days
2002	21.3 °C	26.6 °C	16.5 °C	49 mm	7 days	8 days
2001	22.0 °C	28.0 °C	16.6 °C	24 mm	8 days	5 days
2000	22.6 °C	28.2 °C	16.9 °C	37 mm	10 days	7 days
1999	20.3 °C	24.7 °C	16.2 °C	30 mm	2 days	10 days
1998	21.8 °C	26.4 °C	17.4 °C	41 mm	7 days	8 days
1997	23.2 °C	28.9 °C	18.1 °C	24 mm	10 days	4 days
1996	20.4 °C	25.3 °C	15.7 °C	55 mm	5 days	7 days
1995	19.4 °C	23.8 °C	15.3 °C	73 mm	2 days	9 days
1994	21.6 °C	26.4 °C	16.9 °C	29 mm	7 days	4 days
1993	21.7 °C	26.6 °C	17.0 °C	30 mm	6 days	9 days
1992	20.4 °C	24.5 °C	16.6 °C	100 mm	2 days	13 days
1991	20.3 °C	25.2 °C	15.6 °C	112 mm	5 days	9 days
1990	23.4 °C	29.7 °C	17.8 °C	36 mm	11 days	7 days
1989	21.5 °C	26.3 °C	16.9 °C	42 mm	6 days	10 days
1988	21.8 °C	25.7 °C	18.3 °C	109 mm	3 days	12 days
1987	20.5 °C	25.2 °C	16.7 °C	75 mm	4 days	6 days
1986	20.2 °C	25.5 °C	15.6 °C	14 mm	3 days	5 days
1985	22.1 °C	28.1 °C	17.6 °C	71 mm	11 days	14 days
1984	21.1 °C	26.9 °C	16.2 °C	44 mm	7 days	6 days
1983	20.9 °C	26.0 °C	16.8 °C	68 mm	6 days	12 days
1982	21.9 °C	27.5 °C	17.8 °C	19 mm	7 days	7 days
1981	21.5 °C	27.1 °C	17.2 °C	64 mm	6 days	9 days
1980	22.8 °C	28.6 °C	17.9 °C	42 mm	11 days	10 days
1979	23.3 °C	30.2 °C	18.2 °C	12 mm	11 days	4 days
1978	20.3 °C	25.2 °C	16.5 °C	56 mm	2 days	12 days
1977	22.1 °C	28.6 °C	17.0 °C	28 mm	9 days	9 days
1976	22.9 °C	29.5 °C	17.1 °C	21 mm	13 days	4 days
1975	22.0 °C	26.8 °C	18.2 °C	37 mm	8 days	13 days
1974	21.0 °C	27.2 °C	16.0 °C	12 mm	7 days	3 days
1973	21.3 °C	25.4 °C	17.7 °C	46 mm	2 days	13 days
1972	22.5 °C	28.5 °C	17.3 °C	38 mm	13 days	5 days
1971	20.6 °C	25.7 °C	16.4 °C	143 mm	7 days	13 days
1970	21.3 °C	26.3 °C	16.9 °C	200 mm	7 days	12 days
1969	21.1 °C	26.7 °C	16.0 °C	25 mm	8 days	6 days
1968	19.7 °C	23.9 °C	15.9 °C	95 mm	2 days	11 days
1967	20.5 °C	25.6 °C	15.8 °C	20 mm	6 days	4 days
1966	20.7 °C	25.4 °C	16.5 °C	54 mm	4 days	11 days
1965	20.9 °C	25.2 °C	17.1 °C	46 mm	5 days	10 days
1964	20.6 °C	26.5 °C	15.3 °C	49 mm	5 days	8 days
1963	21.0 °C	25.7 °C	17.0 °C	132 mm	5 days	15 days
1962	20.0 °C	24.0 °C	16.5 °C	162 mm	1 day	15 days
1961	20.6 °C	24.6 °C	17.3 °C	116 mm	4 days	16 days
1960	19.4 °C	23.7 °C	15.8 °C	138 mm	3 days	13 days
1959	21.2 °C	26.2 °C	16.7 °C	55 mm	4 days	10 days
1958	20.2 °C	24.3 °C	16.7 °C	57 mm	3 days	16 days
1957	22.9 °C	29.4 °C	17.6 °C	33 mm	13 days	5 days
1956	22.1 °C	28.7 °C	16.6 °C	16 mm	11 days	5 days
1955	20.2 °C	24.5 °C	16.3 °C	56 mm	2 days	13 days
1954	21.5 °C	26.0 °C	17.9 °C	43 mm	6 days	12 days
1953	23.0 °C	29.5 °C	17.6 °C	26 mm	13 days	4 days
1952	20.6 °C	25.6 °C	16.4 °C	50 mm	4 days	12 days
1951	21.1 °C	27.1 °C	15.8 °C	14 mm	5 days	5 days
1950	20.9 °C	25.3 °C	17.0 °C	36 mm	7 days	12 days
1949	21.3 °C	26.5 °C	17.0 °C	60 mm	8 days	8 days
1948	21.8 °C	26.7 °C	17.4 °C	68 mm	9 days	9 days
1947	20.9 °C	25.8 °C	16.6 °C	152 mm	6 days	15 days
1946	21.0 °C	25.9 °C	16.9 °C	94 mm	5 days	13 days
1945	22.6 °C	28.6 °C	17.7 °C	28 mm	10 days	8 days
1944	22.6 °C	28.7 °C	17.1 °C	61 mm	12 days	6 days
1943	19.4 °C	23.5 °C	15.9 °C	76 mm	1 day	11 days
1942	18.6 °C	23.3 °C	14.6 °C	86 mm	2 days	14 days
1941	19.2 °C	23.7 °C	15.4 °C	121 mm	4 days	11 days
1940	21.5 °C	27.1 °C	16.7 °C	36 mm	10 days	9 days

December records

Hottest day

43.6 °C

December 20, 1957 estimate

Nearby station: 43.5 °C on December 9, 2023 measured

Coldest night

9.5 °C

December 26, 1995 estimate

Nearby station: 8.2 °C on December 7, 1943 measured

Wettest day

88 mm

December 8, 1970 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 December?

Highs average 26.6 °C and lows 16.9 °C. A typical December brings 7 hot days (30 °C or more) and 0 frost days.

Does it rain a lot in Sydney in December?

About 58 mm falls in December, over some 9 days with at least 1 mm. The wettest December was 1970 (200 mm), the driest 2019 (8 mm).

What was the warmest December in Sydney?

2016, with a mean temperature of 23.8 °C. The coldest was 1942 (18.6 °C). The last one, 2025, ranks 35 of 86.