Zastron climate — normals and trends

Q: What is the climate of Zastron?

Zastron has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.5 °C and it receives 942 mm of precipitation per year.

Q: What is the hottest day ever recorded in Zastron?

The hottest day measured in Zastron between 1940 and 2025 was 5 January 2016, reaching 40.0 °C.

Q: What is the coldest day in Zastron?

The coldest day measured in Zastron between 1940 and 2025 was 28 July 1994, at -9.8 °C.

Q: Does it snow in Zastron?

Yes. Zastron gets on average 1.5 cm of snow per year and has around 45 frost days.

Q: Has the climate of Zastron warmed?

Yes: Zastron warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Zastron?

The wettest day measured in Zastron between 1940 and 2025 was 15 December 1975, with 79 mm of rain in 24 hours.

Q: What was the windiest day in Zastron?

The windiest day measured in Zastron between 1940 and 2025 was 11 August 1957, with winds reaching 50.5 km/h.

Q: What is the warmest month in Zastron?

The warmest month in Zastron is January (20.7 °C on average); the coldest is July (6.7 °C).

Q: How much does it rain in Zastron?

Zastron receives on average 942 mm of precipitation per year, spread over about 105 rainy days.

Q: Is it sunny in Zastron?

Zastron gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

Zastron (South Africa) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 14.5 °C and it receives 942 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 (20.7 °C on average) and the coldest is July (6.7 °C). Rainfall peaks in January.

Zastron averages 45 frost days, 33 hot days (≥ 30 °C) and 105 rainy days per year.

Zastron has warmed by +1.7 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.0 °C (on 5 January 2016) and the coldest -9.8 °C (on 28 July 1994).

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

ZastronFree State

coords: -30.30°, 27.08°
period: 1940–2025 · 86 yrs

CwbSubtropical highland, dry winterWarmest monthJanuaryColdest monthJulyWettest monthJanuaryDriest monthJuly

Mean daily temperature

14.5°C

Average daily high

22.4°C

Average daily low

7.9°C

Annual rainfall

942mm

Sunshine / day

11.0h

Mean relative humidity

60%

Average peak wind

17.4km/h

Seasonal range

14.0°C

Frost days (< 0 °C)

45 d/yr

Hot days (≥ 30 °C)

33 d/yr

Rainy days (≥ 1 mm)

105 d/yr

Annual snowfall

1.5 cm

Average feels-like high

20.5 °C

Average feels-like low

5.5 °C

Average peak gust

37.6 km/h

Tropical nights (≥ 20 °C)

1 d/yr

Solar radiation

20.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °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

40.0 °C

5 January 2016

Coldest day

-9.8 °C

28 July 1994

Wettest day

79 mm

15 December 1975

Windiest day

50.5 km/h

11 August 1957

Strongest gust

102.2 km/h

12 September 1996

Hottest feels-like

38.6 °C

5 January 2016

Coldest feels-like

-14.4 °C

28 July 1994

Snowiest day

6.4 cm

17 June 1965

Sunniest day

13.9 h

4 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.1 °C2 January 2025	-6.1 °C8 July 2025	15.5 °C	1,142 mm	34	36
2024	37.6 °C11 December 2024	-6.8 °C21 July 2024	16.0 °C	664 mm	83	41
2023	35.7 °C27 November 2023	-5.7 °C11 July 2023	15.0 °C	987 mm	42	46
2022	31.9 °C3 October 2022	-6.3 °C2 June 2022	14.6 °C	1,260 mm	11	46
2021	33.0 °C16 November 2021	-8.1 °C24 July 2021	14.8 °C	1,042 mm	21	46
2020	33.9 °C6 January 2020	-7.9 °C16 July 2020	14.7 °C	1,186 mm	27	77
2019	36.5 °C22 January 2019	-6.7 °C21 July 2019	16.5 °C	671 mm	77	27
2018	37.7 °C24 December 2018	-6.5 °C5 July 2018	15.3 °C	768 mm	62	55
2017	34.6 °C2 January 2017	-6.4 °C9 June 2017	15.6 °C	719 mm	46	42
2016	40.0 °C5 January 2016	-4.9 °C9 August 2016	16.4 °C	589 mm	79	28
2015	38.2 °C11 December 2015	-5.8 °C1 August 2015	16.4 °C	447 mm	85	32
2014	35.6 °C17 January 2014	-6.9 °C9 July 2014	15.0 °C	841 mm	41	36
2013	35.1 °C13 November 2013	-5.9 °C10 June 2013	15.3 °C	594 mm	56	33
2012	35.2 °C20 November 2012	-4.9 °C13 June 2012	14.9 °C	731 mm	55	40
2011	33.6 °C8 November 2011	-4.5 °C16 July 2011	14.1 °C	1,092 mm	15	51
2010	33.2 °C8 February 2010	-5.3 °C16 June 2010	15.5 °C	963 mm	46	34
2009	35.2 °C21 December 2009	-4.6 °C29 June 2009	14.7 °C	887 mm	32	30
2008	34.0 °C6 November 2008	-5.5 °C11 July 2008	15.2 °C	690 mm	43	20
2007	35.5 °C12 January 2007	-4.6 °C10 July 2007	15.2 °C	697 mm	64	47
2006	34.4 °C14 December 2006	-4.4 °C23 June 2006	14.2 °C	1,155 mm	28	45
2005	37.5 °C7 January 2005	-4.3 °C10 June 2005	15.5 °C	762 mm	58	30
2004	34.7 °C30 December 2004	-4.8 °C1 August 2004	15.2 °C	901 mm	49	40
2003	36.2 °C20 December 2003	-5.5 °C10 June 2003	15.4 °C	689 mm	75	43
2002	34.8 °C1 December 2002	-5.3 °C17 July 2002	14.5 °C	1,015 mm	27	39
2001	35.2 °C12 January 2001	-4.7 °C6 July 2001	14.4 °C	1,239 mm	28	43
2000	32.2 °C6 December 2000	-7.4 °C21 July 2000	14.1 °C	1,089 mm	17	50
1999	34.8 °C23 November 1999	-5.1 °C26 June 1999	15.5 °C	861 mm	44	39
1998	34.3 °C14 November 1998	-6.6 °C9 June 1998	14.8 °C	1,007 mm	33	46
1997	37.6 °C13 December 1997	-5.7 °C26 July 1997	14.1 °C	899 mm	37	46
1996	33.3 °C3 November 1996	-6.8 °C17 July 1996	13.7 °C	1,128 mm	19	55
1995	37.2 °C7 January 1995	-6.2 °C19 July 1995	14.9 °C	867 mm	51	52
1994	36.0 °C21 December 1994	-9.8 °C28 July 1994	14.0 °C	748 mm	29	62
1993	36.7 °C6 January 1993	-4.8 °C21 June 1993	14.8 °C	943 mm	26	44
1992	35.4 °C5 February 1992	-8.4 °C26 June 1992	15.4 °C	453 mm	76	54
1991	34.2 °C3 January 1991	-6.9 °C28 July 1991	14.3 °C	1,218 mm	18	54
1990	33.8 °C28 December 1990	-6.5 °C14 July 1990	14.1 °C	865 mm	30	52
1989	32.8 °C27 December 1989	-6.3 °C20 July 1989	13.7 °C	1,096 mm	11	55
1988	36.0 °C4 February 1988	-5.8 °C16 June 1988	13.8 °C	1,588 mm	17	48
1987	37.5 °C1 February 1987	-5.2 °C20 June 1987	14.8 °C	1,193 mm	44	46
1986	33.6 °C12 January 1986	-4.1 °C23 June 1986	14.6 °C	1,137 mm	21	36
1985	35.6 °C2 January 1985	-4.7 °C8 June 1985	15.0 °C	1,057 mm	35	46
1984	36.5 °C31 December 1984	-6.4 °C5 July 1984	14.9 °C	667 mm	62	47
1983	37.7 °C8 January 1983	-4.6 °C9 July 1983	15.6 °C	797 mm	72	31
1982	35.9 °C29 December 1982	-4.1 °C19 June 1982	14.8 °C	881 mm	46	50
1981	33.9 °C17 January 1981	-6.7 °C2 September 1981	13.9 °C	1,073 mm	27	47
1980	35.3 °C24 December 1980	-7.6 °C4 July 1980	15.1 °C	633 mm	50	57
1979	34.3 °C12 February 1979	-6.9 °C14 June 1979	14.7 °C	829 mm	38	38
1978	34.0 °C7 December 1978	-6.9 °C15 June 1978	14.1 °C	774 mm	22	57
1977	34.0 °C21 January 1977	-6.4 °C14 June 1977	14.1 °C	967 mm	25	59
1976	31.8 °C1 December 1976	-5.8 °C21 June 1976	13.0 °C	1,278 mm	4	54
1975	32.6 °C9 January 1975	-6.5 °C3 August 1975	13.4 °C	1,088 mm	13	58
1974	31.7 °C13 October 1974	-6.0 °C2 August 1974	13.2 °C	1,423 mm	2	54
1973	36.9 °C18 January 1973	-5.1 °C12 July 1973	14.3 °C	924 mm	32	48
1972	34.1 °C6 December 1972	-6.3 °C10 July 1972	14.2 °C	917 mm	35	58
1971	32.9 °C26 December 1971	-5.8 °C16 June 1971	13.9 °C	1,144 mm	9	40
1970	33.0 °C14 January 1970	-6.8 °C23 July 1970	14.5 °C	945 mm	37	42
1969	34.6 °C5 January 1969	-5.8 °C20 July 1969	14.5 °C	704 mm	54	42
1968	33.9 °C1 January 1968	-5.9 °C6 July 1968	13.8 °C	579 mm	53	56
1967	34.8 °C30 December 1967	-5.2 °C26 July 1967	13.9 °C	1,032 mm	31	48
1966	36.1 °C1 January 1966	-7.2 °C21 July 1966	14.9 °C	877 mm	33	36
1965	36.0 °C27 December 1965	-8.2 °C19 June 1965	13.9 °C	765 mm	28	50
1964	34.2 °C23 January 1964	-7.4 °C26 June 1964	13.8 °C	1,052 mm	29	58
1963	34.2 °C28 December 1963	-5.3 °C13 July 1963	13.8 °C	1,332 mm	15	49
1962	33.7 °C12 November 1962	-7.9 °C15 June 1962	14.7 °C	898 mm	28	43
1961	34.3 °C11 January 1961	-5.6 °C16 July 1961	14.2 °C	1,155 mm	28	34
1960	33.6 °C15 January 1960	-5.3 °C19 July 1960	13.8 °C	1,292 mm	20	46
1959	32.1 °C16 October 1959	-5.3 °C25 June 1959	13.8 °C	1,296 mm	9	48
1958	33.3 °C22 November 1958	-6.3 °C20 June 1958	14.3 °C	1,148 mm	18	51
1957	32.2 °C19 December 1957	-6.0 °C20 June 1957	14.0 °C	1,122 mm	9	43
1956	32.2 °C2 February 1956	-6.3 °C12 June 1956	13.8 °C	1,079 mm	8	40
1955	32.1 °C18 January 1955	-7.1 °C25 July 1955	13.1 °C	944 mm	9	57
1954	32.0 °C6 March 1954	-5.3 °C19 July 1954	14.1 °C	314 mm	16	58
1953	33.8 °C29 January 1953	-4.9 °C31 July 1953	14.8 °C	802 mm	21	38
1952	34.2 °C18 January 1952	-3.6 °C27 July 1952	14.7 °C	854 mm	31	19
1951	35.2 °C29 December 1951	-4.4 °C9 July 1951	13.7 °C	991 mm	24	45
1950	32.2 °C21 October 1950	-3.5 °C9 July 1950	14.1 °C	1,081 mm	9	30
1949	34.0 °C30 January 1949	-3.5 °C17 July 1949	15.0 °C	381 mm	38	27
1948	30.5 °C9 December 1948	-6.1 °C4 August 1948	13.0 °C	1,127 mm	1	43
1947	35.2 °C19 January 1947	-4.8 °C16 July 1947	13.4 °C	1,069 mm	26	47
1946	35.2 °C4 December 1946	-5.3 °C28 July 1946	13.5 °C	920 mm	18	59
1945	32.4 °C20 December 1945	-4.7 °C13 June 1945	13.6 °C	994 mm	11	39
1944	30.3 °C4 October 1944	-4.3 °C10 July 1944	13.4 °C	1,175 mm	2	39
1943	29.3 °C27 January 1943	-4.7 °C5 August 1943	13.0 °C	1,226 mm	0	50
1942	36.7 °C9 January 1942	-5.3 °C5 July 1942	13.6 °C	1,056 mm	15	56
1941	33.3 °C2 January 1941	-4.9 °C30 June 1941	14.8 °C	668 mm	38	37
1940	34.6 °C17 December 1940	-6.1 °C13 July 1940	14.2 °C	839 mm	22	45

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

23.1 °C

+0.7 °C

Hot days (≥ 30 °C)

34 d/yr

Frost days (< 0 °C)

36 d/yr

-9

Annual rainfall

1142 mm

+200 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.2 °C	+3.3 °C	76 mm	-82 mm
Feb	27.8 °C	+1.2 °C	127 mm	-21 mm
Mar	25.0 °C	+0.3 °C	169 mm	+44 mm
Apr	20.4 °C	-0.9 °C	210 mm	+133 mm
May	19.1 °C	+0.8 °C	14 mm	-19 mm
Jun	16.1 °C	+0.8 °C	28 mm	+10 mm
Jul	16.0 °C	+0.4 °C	32 mm	+17 mm
Aug	20.4 °C	+2.0 °C	14 mm	-7 mm
Sep	23.6 °C	+1.2 °C	38 mm	+5 mm
Oct	25.8 °C	+1.3 °C	60 mm	-16 mm
Nov	25.1 °C	-0.8 °C	155 mm	+49 mm
Dec	26.8 °C	-0.7 °C	220 mm	+87 mm

The year's extremes

Hottest day

35.1 °C

2 Jan 2025

Coldest day

-6.1 °C

8 Jul 2025

Wettest day

33.5 mm

27 Nov 2025

Windiest day

35.8 km/h

15 Jan 2025

Strongest gust

75.6 km/h

5 Sep 2025

Hottest feels-like

36.0 °C

26 Jan 2025

Coldest feels-like

-10.1 °C

8 Jul 2025

Snowiest day

3.5 cm

10 Jun 2025

Sunniest day

13.9 h

6 Dec 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 Zastron?

Zastron has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 14.5 °C and it receives 942 mm of precipitation per year.

What is the hottest day ever recorded in Zastron?

The hottest day measured in Zastron between 1940 and 2025 was 5 January 2016, reaching 40.0 °C.

What is the coldest day in Zastron?

The coldest day measured in Zastron between 1940 and 2025 was 28 July 1994, at -9.8 °C.

Does it snow in Zastron?

Yes. Zastron gets on average 1.5 cm of snow per year and has around 45 frost days.

Has the climate of Zastron warmed?

Yes: Zastron warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Zastron?

The wettest day measured in Zastron between 1940 and 2025 was 15 December 1975, with 79 mm of rain in 24 hours.

What was the windiest day in Zastron?

The windiest day measured in Zastron between 1940 and 2025 was 11 August 1957, with winds reaching 50.5 km/h.

What is the warmest month in Zastron?

The warmest month in Zastron is January (20.7 °C on average); the coldest is July (6.7 °C).

How much does it rain in Zastron?

Zastron receives on average 942 mm of precipitation per year, spread over about 105 rainy days.

Is it sunny in Zastron?

Zastron gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

What is the biggest single-day snowfall in Zastron?

The heaviest 24-hour snowfall measured in Zastron between 1940 and 2025 was 17 June 1965, with 6.4 cm.

Are there tropical nights in Zastron?

Yes: Zastron has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Zastron?

In Zastron, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 5 January 2016, and the lowest was -14.4 °C on 28 July 1994.

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