St Clair climate — normals and trends

Q: What is the climate of St Clair?

St Clair has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 749 mm of precipitation per year.

Q: What is the hottest day ever recorded in St Clair?

The hottest day measured in St Clair between 1940 and 2025 was 4 January 2020, reaching 45.4 °C.

Q: What is the coldest day in St Clair?

The coldest day measured in St Clair between 1940 and 2025 was 16 July 1978, at -3.4 °C.

Q: Does it snow in St Clair?

Almost never: St Clair sees virtually no snow, with about 2 frost days per year.

Q: Has the climate of St Clair warmed?

Yes: St Clair warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in St Clair?

The wettest day measured in St Clair between 1940 and 2025 was 9 February 2020, with 176 mm of rain in 24 hours.

Q: What was the windiest day in St Clair?

The windiest day measured in St Clair between 1940 and 2025 was 21 June 1975, with winds reaching 48.3 km/h.

Q: What is the warmest month in St Clair?

The warmest month in St Clair is January (22.2 °C on average); the coldest is July (9.8 °C).

Q: How much does it rain in St Clair?

St Clair receives on average 749 mm of precipitation per year, spread over about 99 rainy days.

Q: Is it sunny in St Clair?

St Clair gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

St Clair (Australia) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.5 °C and it receives 749 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is January (22.2 °C on average) and the coldest is July (9.8 °C). Rainfall peaks in February.

St Clair averages 2 frost days, 41 hot days (≥ 30 °C) and 99 rainy days per year.

St Clair has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.

The hottest day of the period reached 45.4 °C (on 4 January 2020) and the coldest -3.4 °C (on 16 July 1978).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

St ClairNew South Wales

coords: -33.80°, 150.78°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthFebruaryDriest monthJuly

Mean daily temperature

16.5°C

Average daily high

22.6°C

Average daily low

11.3°C

Annual rainfall

749mm

Sunshine / day

9.9h

Mean relative humidity

71%

Average peak wind

14.6km/h

Seasonal range

12.4°C

Frost days (< 0 °C)

2 d/yr

Hot days (≥ 30 °C)

41 d/yr

Rainy days (≥ 1 mm)

99 d/yr

Annual snowfall

0.0 cm

Average feels-like high

22.1 °C

Average feels-like low

10.3 °C

Average peak gust

33.4 km/h

Tropical nights (≥ 20 °C)

11 d/yr

Solar radiation

16.7 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.2 °C

since 1940

+0.1 °C per decade · r² = 0.42 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

45.4 °C

4 January 2020

Coldest day

-3.4 °C

16 July 1978

Wettest day

176 mm

9 February 2020

Windiest day

48.3 km/h

21 June 1975

Strongest gust

109.1 km/h

21 June 1975

Hottest feels-like

49.0 °C

1 February 2020

Coldest feels-like

-6.9 °C

16 July 1978

Sunniest day

14.0 h

3 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	41.5 °C28 January 2025	-0.7 °C20 June 2025	17.5 °C	867 mm	62	4
2024	39.2 °C29 February 2024	0.6 °C19 June 2024	17.5 °C	821 mm	53	0
2023	40.9 °C9 December 2023	-1.2 °C20 July 2023	17.1 °C	658 mm	54	4
2022	34.5 °C17 February 2022	0.3 °C16 July 2022	16.3 °C	1,408 mm	21	0
2021	39.4 °C26 January 2021	-0.4 °C30 July 2021	16.2 °C	913 mm	27	2
2020	45.4 °C4 January 2020	0.8 °C27 August 2020	17.0 °C	1,199 mm	36	0
2019	43.3 °C21 December 2019	0.5 °C15 August 2019	17.6 °C	432 mm	76	0
2018	42.8 °C7 January 2018	-1.8 °C16 July 2018	17.4 °C	475 mm	73	5
2017	43.6 °C11 February 2017	-0.7 °C2 July 2017	17.4 °C	714 mm	53	6
2016	40.3 °C25 February 2016	-1.1 °C4 July 2016	17.6 °C	790 mm	51	1
2015	40.8 °C20 November 2015	-0.2 °C5 July 2015	16.8 °C	894 mm	43	1
2014	41.7 °C23 November 2014	0.2 °C9 July 2014	17.2 °C	689 mm	49	0
2013	44.6 °C18 January 2013	1.1 °C8 July 2013	17.1 °C	804 mm	54	0
2012	38.5 °C30 November 2012	0.6 °C25 June 2012	16.3 °C	763 mm	29	0
2011	40.5 °C1 February 2011	0.5 °C9 July 2011	16.4 °C	712 mm	34	0
2010	42.0 °C23 January 2010	-1.7 °C30 June 2010	16.7 °C	959 mm	35	2
2009	41.4 °C20 November 2009	0.5 °C9 August 2009	17.3 °C	565 mm	61	0
2008	35.5 °C31 October 2008	0.1 °C12 July 2008	16.2 °C	686 mm	38	0
2007	40.0 °C21 January 2007	-2.1 °C17 July 2007	17.0 °C	902 mm	37	2
2006	44.4 °C1 January 2006	0.3 °C28 June 2006	16.8 °C	436 mm	53	0
2005	42.0 °C14 January 2005	-0.3 °C13 August 2005	17.0 °C	755 mm	46	1
2004	40.5 °C30 November 2004	0.4 °C21 July 2004	17.0 °C	606 mm	52	0
2003	43.8 °C30 January 2003	-0.6 °C28 July 2003	16.6 °C	669 mm	32	2
2002	40.0 °C25 November 2002	-1.2 °C12 July 2002	16.8 °C	479 mm	50	3
2001	44.7 °C15 January 2001	0.0 °C24 August 2001	16.8 °C	587 mm	43	0
2000	39.7 °C19 January 2000	-0.8 °C9 June 2000	16.5 °C	742 mm	41	4
1999	38.9 °C11 January 1999	-0.3 °C3 August 1999	16.4 °C	744 mm	35	1
1998	40.2 °C18 January 1998	-1.2 °C17 July 1998	17.1 °C	896 mm	55	2
1997	40.1 °C27 November 1997	-0.7 °C20 July 1997	16.7 °C	571 mm	48	4
1996	39.7 °C31 January 1996	-0.6 °C12 July 1996	16.1 °C	666 mm	32	4
1995	37.7 °C28 November 1995	-1.4 °C5 July 1995	16.1 °C	774 mm	25	6
1994	43.7 °C21 December 1994	-0.9 °C18 July 1994	16.6 °C	447 mm	49	4
1993	41.1 °C4 February 1993	-0.6 °C26 June 1993	16.5 °C	575 mm	38	1
1992	38.5 °C21 January 1992	-1.1 °C23 July 1992	15.8 °C	865 mm	12	4
1991	41.4 °C14 February 1991	-0.6 °C18 July 1991	17.0 °C	702 mm	62	2
1990	42.3 °C3 January 1990	-0.5 °C21 June 1990	16.4 °C	1,291 mm	39	2
1989	37.0 °C10 March 1989	-0.8 °C8 July 1989	16.5 °C	822 mm	32	2
1988	39.5 °C3 November 1988	1.5 °C1 August 1988	16.8 °C	1,055 mm	44	0
1987	40.0 °C2 February 1987	-1.4 °C14 July 1987	16.1 °C	901 mm	36	3
1986	41.2 °C2 February 1986	-2.6 °C27 July 1986	16.0 °C	901 mm	37	6
1985	39.8 °C16 February 1985	-1.3 °C24 June 1985	16.1 °C	740 mm	39	3
1984	37.6 °C18 December 1984	-1.3 °C23 June 1984	15.9 °C	1,035 mm	37	1
1983	41.4 °C8 January 1983	-1.0 °C11 July 1983	16.8 °C	699 mm	51	3
1982	43.8 °C25 November 1982	-1.2 °C18 July 1982	16.6 °C	506 mm	55	3
1981	40.8 °C5 December 1981	-0.9 °C11 July 1981	16.8 °C	796 mm	46	1
1980	43.0 °C18 November 1980	-1.0 °C13 July 1980	17.5 °C	434 mm	71	3
1979	44.1 °C10 January 1979	-0.2 °C7 July 1979	16.6 °C	586 mm	55	1
1978	39.3 °C14 January 1978	-3.4 °C16 July 1978	15.9 °C	1,205 mm	34	7
1977	41.7 °C1 February 1977	-2.7 °C22 July 1977	16.5 °C	739 mm	61	9
1976	39.3 °C7 December 1976	-1.0 °C10 July 1976	15.5 °C	942 mm	22	2
1975	38.8 °C21 January 1975	-0.6 °C11 July 1975	15.9 °C	781 mm	37	3
1974	36.3 °C18 December 1974	-1.0 °C27 June 1974	15.6 °C	982 mm	22	3
1973	40.4 °C6 February 1973	-0.1 °C7 June 1973	16.4 °C	871 mm	36	1
1972	39.5 °C21 December 1972	-0.2 °C23 July 1972	15.8 °C	793 mm	22	1
1971	39.7 °C9 January 1971	-1.5 °C2 July 1971	15.7 °C	718 mm	28	6
1970	37.7 °C10 January 1970	-1.2 °C16 July 1970	15.6 °C	726 mm	35	5
1969	38.7 °C8 January 1969	0.2 °C29 June 1969	16.1 °C	995 mm	41	0
1968	41.5 °C1 February 1968	-1.4 °C26 July 1968	16.6 °C	514 mm	54	2
1967	39.6 °C21 January 1967	-0.6 °C21 July 1967	16.1 °C	738 mm	36	1
1966	40.4 °C29 January 1966	-0.4 °C12 July 1966	15.8 °C	670 mm	40	3
1965	39.7 °C30 December 1965	0.0 °C16 July 1965	16.3 °C	430 mm	52	0
1964	41.5 °C7 January 1964	-1.3 °C7 July 1964	16.3 °C	765 mm	44	2
1963	37.2 °C28 December 1963	-0.5 °C22 June 1963	16.0 °C	1,254 mm	23	1
1962	35.8 °C8 February 1962	0.1 °C23 August 1962	15.8 °C	754 mm	17	0
1961	42.4 °C29 January 1961	0.2 °C25 June 1961	16.1 °C	1,006 mm	33	0
1960	42.4 °C27 January 1960	-0.6 °C25 July 1960	16.0 °C	580 mm	35	1
1959	37.3 °C15 January 1959	-0.3 °C15 June 1959	16.0 °C	930 mm	33	1
1958	38.8 °C10 January 1958	-0.8 °C14 July 1958	16.2 °C	651 mm	40	3
1957	44.0 °C2 December 1957	-1.4 °C19 July 1957	16.7 °C	344 mm	55	4
1956	38.8 °C31 December 1956	-1.2 °C15 July 1956	16.2 °C	977 mm	29	4
1955	41.8 °C3 January 1955	-1.5 °C9 July 1955	16.8 °C	542 mm	32	3
1954	36.4 °C28 November 1954	-1.1 °C20 June 1954	16.3 °C	630 mm	32	5
1953	43.6 °C21 December 1953	-0.5 °C13 August 1953	16.4 °C	461 mm	40	5
1952	44.5 °C25 January 1952	-1.3 °C15 July 1952	16.4 °C	719 mm	42	2
1951	39.3 °C6 December 1951	-0.3 °C12 July 1951	16.0 °C	561 mm	37	1
1950	39.2 °C6 January 1950	-0.3 °C6 July 1950	15.9 °C	1,509 mm	29	1
1949	36.7 °C7 February 1949	-1.1 °C25 June 1949	16.0 °C	664 mm	34	5
1948	37.6 °C21 January 1948	-0.4 °C1 July 1948	15.9 °C	570 mm	39	3
1947	36.9 °C31 December 1947	-0.5 °C2 August 1947	15.4 °C	689 mm	20	1
1946	44.8 °C5 January 1946	-0.1 °C6 July 1946	16.3 °C	506 mm	58	1
1945	38.2 °C10 December 1945	-0.2 °C19 July 1945	16.1 °C	611 mm	39	1
1944	43.5 °C19 November 1944	-1.4 °C3 June 1944	16.1 °C	558 mm	55	5
1943	38.9 °C13 January 1943	-0.7 °C24 July 1943	15.6 °C	424 mm	45	3
1942	37.6 °C4 October 1942	-1.0 °C29 July 1942	15.5 °C	835 mm	19	5
1941	38.6 °C30 November 1941	-1.6 °C9 July 1941	15.7 °C	787 mm	38	4
1940	40.6 °C26 January 1940	0.7 °C9 August 1940	16.8 °C	492 mm	57	0

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

23.8 °C

+1.2 °C

Hot days (≥ 30 °C)

62 d/yr

+21

Frost days (< 0 °C)

4 d/yr

Annual rainfall

867 mm

+118 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	27.8 °C	-0.2 °C	117 mm	+33 mm
Feb	28.2 °C	+1.0 °C	60 mm	-38 mm
Mar	26.8 °C	+1.3 °C	90 mm	+6 mm
Apr	24.4 °C	+1.7 °C	70 mm	+9 mm
May	19.8 °C	+0.5 °C	127 mm	+79 mm
Jun	17.2 °C	+0.7 °C	5 mm	-47 mm
Jul	16.8 °C	+0.5 °C	66 mm	+35 mm
Aug	17.3 °C	-0.7 °C	121 mm	+79 mm
Sep	23.4 °C	+2.4 °C	72 mm	+33 mm
Oct	27.0 °C	+3.4 °C	20 mm	-41 mm
Nov	28.1 °C	+2.6 °C	29 mm	-49 mm
Dec	29.2 °C	+1.9 °C	91 mm	+17 mm

The year's extremes

Hottest day

41.5 °C

28 Jan 2025

Coldest day

-0.7 °C

20 Jun 2025

Wettest day

47.4 mm

12 Dec 2025

Windiest day

38.8 km/h

1 Jul 2025

Strongest gust

86.4 km/h

1 Jul 2025

Hottest feels-like

44.9 °C

28 Jan 2025

Coldest feels-like

-3.9 °C

22 Jun 2025

Sunniest day

14.0 h

1 Jan 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of St Clair?

St Clair has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 749 mm of precipitation per year.

What is the hottest day ever recorded in St Clair?

The hottest day measured in St Clair between 1940 and 2025 was 4 January 2020, reaching 45.4 °C.

What is the coldest day in St Clair?

The coldest day measured in St Clair between 1940 and 2025 was 16 July 1978, at -3.4 °C.

Does it snow in St Clair?

Almost never: St Clair sees virtually no snow, with about 2 frost days per year.

Has the climate of St Clair warmed?

Yes: St Clair warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in St Clair?

The wettest day measured in St Clair between 1940 and 2025 was 9 February 2020, with 176 mm of rain in 24 hours.

What was the windiest day in St Clair?

The windiest day measured in St Clair between 1940 and 2025 was 21 June 1975, with winds reaching 48.3 km/h.

What is the warmest month in St Clair?

The warmest month in St Clair is January (22.2 °C on average); the coldest is July (9.8 °C).

How much does it rain in St Clair?

St Clair receives on average 749 mm of precipitation per year, spread over about 99 rainy days.

Is it sunny in St Clair?

St Clair gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in St Clair?

Yes: St Clair has on average 11 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in St Clair?

In St Clair, between 1940 and 2025, the highest apparent temperature reached 49.0 °C on 1 February 2020, and the lowest was -6.9 °C on 16 July 1978.

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