Postmasburg Weather Records (SF003211100)

Record envelope, standing records and threshold days for Postmasburg (SF003211100), South Africa, with 109 years of record.

Key Facts for Postmasburg

Postmasburg (SF003211100) is a weather station in South Africa at -28.33 latitude and 23.07 longitude, 1,321 m (4,334 ft) above sea level.
The station reports from 1917 to 2025, 109 years of record.
1,464 records set at Postmasburg still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Postmasburg set a daily record precipitation of 8.9 mm (0.35 in) on 6 August 2025.

About the Station

Location: South Africa, -28.33 latitude, 23.07 longitude.
Elevation: 1,321 m (4,334 ft).
Period of record: 1917 to 2025, 109 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

6 days at or beyond a record

The band shows the record high and record low for each calendar day at Postmasburg. The lines show the 2026 daily maximum and minimum. 6 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Postmasburg, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.9 C (105.6 F)	6.5 C (43.7 F)	39.1 C (102.4 F)	12.4 C (54.3 F)
Feb	40.0 C (104.0 F)	7.9 C (46.2 F)	n/a	n/a
Mar	38.9 C (102.0 F)	4.4 C (39.9 F)	n/a	n/a
Apr	37.1 C (98.8 F)	-0.4 C (31.3 F)	n/a	n/a
May	33.1 C (91.6 F)	-4.3 C (24.3 F)	26.7 C (80.1 F)	-1.4 C (29.5 F)
Jun	31.5 C (88.7 F)	-7.5 C (18.5 F)	23.8 C (74.8 F)	-3.8 C (25.2 F)
Jul	29.4 C (84.9 F)	-7.5 C (18.5 F)	23.4 C (74.1 F)	-2.9 C (26.8 F)
Aug	31.7 C (89.1 F)	-6.0 C (21.2 F)	27.5 C (81.5 F)	-1.6 C (29.1 F)
Sep	37.5 C (99.5 F)	-3.0 C (26.6 F)	n/a	n/a
Oct	39.4 C (102.9 F)	-1.2 C (29.8 F)	n/a	n/a
Nov	40.4 C (104.7 F)	1.9 C (35.4 F)	n/a	n/a
Dec	40.9 C (105.6 F)	4.7 C (40.5 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Postmasburg still stand. 2018 holds the most, with 142.

Standing records at Postmasburg by the year they were set
Year set	Standing records
1998	41
1999	38
2000	38
2001	47
2002	21
2003	45
2004	47
2005	50
2006	61
2007	7
2008	12
2009	39
2010	63
2011	41
2012	36
2013	5
2014	52
2015	81
2016	54
2017	113
2018	142
2019	44
2020	68
2021	60
2022	72
2023	73
2024	89
2025	25

All-Time Record Progression

4 new records

4 all-time records were set at Postmasburg between 31 January 1955 and 7 February 2004. Each dot is a new record.

When Postmasburg set new all-time records
Date	Kind	Detail
1955-01-31	Record daily precipitation	Record daily precipitation 104.5 mm (4.1 in)
1988-02-22	Record daily precipitation	Record daily precipitation 130.0 mm (5.1 in)
2004-02-06	Record daily precipitation	Record daily precipitation 177.5 mm (7.0 in)
2004-02-07	Record daily precipitation	Record daily precipitation 185.7 mm (7.3 in)

Wettest Day of Each Month

Feb: 185.7 mm (7.3 in)

The wettest day on record for each calendar month at Postmasburg. The most was 185.7 mm (7.3 in) on 7 February 2004.

Record daily precipitation for each month at Postmasburg
Month	Record daily precipitation (mm)	Date
Jan	104.5 mm (4.1 in)	31 January 1955
Feb	185.7 mm (7.3 in)	7 February 2004
Mar	77.5 mm (3.1 in)	9 March 1944
Apr	69.6 mm (2.7 in)	24 April 1943
May	55.0 mm (2.2 in)	21 May 1979
Jun	39.5 mm (1.6 in)	7 June 1991
Jul	31.0 mm (1.2 in)	14 July 1979
Aug	34.0 mm (1.3 in)	18 August 1960
Sep	39.5 mm (1.6 in)	12 September 1957
Oct	68.3 mm (2.7 in)	14 October 2008
Nov	66.0 mm (2.6 in)	26 November 1961
Dec	69.0 mm (2.7 in)	2 December 1973

Period of Record Coverage

1998 to 2025

28 years of record at Postmasburg, 1998 to 2025. 18 years have data for under 90 percent of days and are left out of rankings: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 and others.

Days with data per year at Postmasburg
Year	Days with data	Share of year	Complete
1998	229	63%	No
1999	257	70%	No
2000	239	65%	No
2001	261	72%	No
2002	128	35%	No
2003	189	52%	No
2004	293	80%	No
2005	303	83%	No
2006	280	77%	No
2007	53	15%	No
2008	103	28%	No
2009	190	52%	No
2010	328	90%	No
2011	307	84%	No
2012	171	47%	No
2013	69	19%	No
2014	362	99%	Yes
2015	327	90%	No
2016	357	98%	Yes
2017	354	97%	Yes
2018	337	92%	Yes
2019	358	98%	Yes
2020	358	98%	Yes
2021	351	96%	Yes
2022	347	95%	Yes
2023	336	92%	Yes
2024	352	96%	Yes
2025	138	38%	No

Latest Records

Latest records at Postmasburg
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
6 August 2025	Postmasburg, ZA	daily rain	8.9 mm (0.35 in)	6.4 mm (0.25 in)	103 years	20 of 100 (Routine)
25 July 2025	Postmasburg, ZA	daily rain	6.1 mm (0.24 in)	2.8 mm (0.11 in)	27 years	20 of 100 (Routine)
11 June 2025	Postmasburg, ZA	daily rain	0.3 mm (0.01 in)	0.3 mm (0.01 in)	108 years	20 of 100 (Routine)
9 June 2025	Postmasburg, ZA	daily rain	7.9 mm (0.31 in)	1.8 mm (0.07 in)	74 years	20 of 100 (Routine)
2 July 2024	Postmasburg, ZA	daily rain	5.1 mm (0.20 in)	2.1 mm (0.08 in)	51 years	20 of 100 (Routine)
31 May 2023	Postmasburg, ZA	daily rain	18.0 mm (0.7 in)	6.3 mm (0.25 in)	100 years	20 of 100 (Routine)
6 May 2023	Postmasburg, ZA	daily rain	7.9 mm (0.31 in)	1.0 mm (0.04 in)	104 years	20 of 100 (Routine)
29 December 2022	Postmasburg, ZA	daily rain (Tie)	23.9 mm (0.9 in)	tie	88 years	9 of 100 (Routine)
16 November 2022	Postmasburg, ZA	daily rain	9.9 mm (0.39 in)	2.0 mm (0.08 in)	96 years	20 of 100 (Routine)
24 June 2022	Postmasburg, ZA	daily rain	0.8 mm (0.03 in)	0.3 mm (0.01 in)	24 years	17 of 100 (Routine)
23 June 2022	Postmasburg, ZA	daily rain	11.9 mm (0.5 in)	10.1 mm (0.4 in)	16 years	20 of 100 (Routine)
22 June 2022	Postmasburg, ZA	daily rain	31.0 mm (1.2 in)	13.7 mm (0.5 in)	9 years	28 of 100 (Routine)
25 May 2022	Postmasburg, ZA	daily rain	5.1 mm (0.20 in)	0.6 mm (0.02 in)	48 years	20 of 100 (Routine)
24 March 2022	Postmasburg, ZA	daily rain	23.1 mm (0.9 in)	8.6 mm (0.34 in)	104 years	20 of 100 (Routine)
23 March 2022	Postmasburg, ZA	daily rain	45.0 mm (1.8 in)	15.0 mm (0.6 in)	40 years	35 of 100 (Notable)
1 February 2022	Postmasburg, ZA	daily rain	40.9 mm (1.6 in)	1.5 mm (0.06 in)	80 years	34 of 100 (Routine)
11 January 2022	Postmasburg, ZA	daily rain	20.1 mm (0.8 in)	11.1 mm (0.4 in)	34 years	20 of 100 (Routine)
27 January 2021	Postmasburg, ZA	daily rain	64.0 mm (2.5 in)	38.3 mm (1.5 in)	44 years	55 of 100 (Notable)
5 January 2021	Postmasburg, ZA	daily rain	55.9 mm (2.2 in)	37.4 mm (1.5 in)	65 years	60 of 100 (Major)
22 December 2020	Postmasburg, ZA	daily rain	53.1 mm (2.1 in)	38.6 mm (1.5 in)	47 years	64 of 100 (Major)

Climate Trend

10 complete years, 2010 to 2024

One stripe for each of 10 complete years at Postmasburg, 2010 to 2024. Blue stripes are years cooler than the station's own mean of 19.5 C (67.0 F); red stripes are warmer. The coolest year was 2021, at 18.1 C (64.6 F), and the warmest was 2017, at 20.7 C (69.3 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Postmasburg as warming stripes, 2010 to 2024
Year	Annual mean temperature	Difference from the station mean
2010	19.6 C	+0.17 C
2014	18.1 C	-1.35 C
2016	19.4 C	-0.10 C
2017	20.7 C	+1.24 C
2019	20.2 C	+0.71 C
2020	18.9 C	-0.57 C
2021	18.1 C	-1.37 C
2022	19.8 C	+0.37 C
2023	19.6 C	+0.18 C
2024	20.2 C	+0.69 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1917 to 2025

Yearly extremes at Postmasburg: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.9 C (105.6 F)	2016	38.3 C (100.9 F)	28
Coldest night (TNn)	-7.5 C (18.5 F)	2010	-4.6 C (23.7 F)	28
Wettest day (Rx1day)	185.7 mm (7.3 in)	2004	39.1 mm (1.5 in)	103
Wettest five days (Rx5day)	364.0 mm (14.3 in)	2004	57.7 mm (2.3 in)	96
Longest dry spell (CDD)	183 days	1948	78 days	103

Hottest day (TXx)

The hottest day of the year at Postmasburg, 1917 to 2025. The record is 40.9 C (105.6 F) in 2016, marked on the chart; the median year is 38.3 C (100.9 F).

Hottest day (TXx) at Postmasburg by year
Year	Hottest day (TXx)
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1998	37.0 C (98.6 F)
1999	37.7 C (99.9 F)
2000	36.7 C (98.1 F)
2001	38.1 C (100.6 F)
2002	37.1 C (98.8 F)
2003	37.4 C (99.3 F)
2004	37.3 C (99.1 F)
2005	39.3 C (102.7 F)
2006	37.9 C (100.2 F)
2007	35.2 C (95.4 F)
2008	38.4 C (101.1 F)
2009	39.8 C (103.6 F)
2010	36.5 C (97.7 F)
2011	36.8 C (98.2 F)
2012	38.6 C (101.5 F)
2013	37.9 C (100.2 F)
2014	38.8 C (101.8 F)
2015	39.1 C (102.4 F)
2016	40.9 C (105.6 F)
2017	38.5 C (101.3 F)
2018	40.9 C (105.6 F)
2019	38.4 C (101.1 F)
2020	37.9 C (100.2 F)
2021	35.7 C (96.3 F)
2022	38.8 C (101.8 F)
2023	40.2 C (104.4 F)
2024	40.9 C (105.6 F)
2025	39.1 C (102.4 F)

Coldest night (TNn)

The coldest night of the year at Postmasburg, 1917 to 2025. The record is -7.5 C (18.5 F) in 2010, marked on the chart; the median year is -4.6 C (23.7 F).

Coldest night (TNn) at Postmasburg by year
Year	Coldest night (TNn)
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1998	-5.0 C (23.0 F)
1999	-3.4 C (25.9 F)
2000	-7.1 C (19.2 F)
2001	-6.0 C (21.2 F)
2002	-5.8 C (21.6 F)
2003	-6.2 C (20.8 F)
2004	-6.9 C (19.6 F)
2005	-3.2 C (26.2 F)
2006	-6.1 C (21.0 F)
2007	-3.6 C (25.5 F)
2008	-3.0 C (26.6 F)
2009	-4.3 C (24.3 F)
2010	-7.5 C (18.5 F)
2011	-4.9 C (23.2 F)
2012	-1.2 C (29.8 F)
2013	2.1 C (35.8 F)
2014	-7.2 C (19.0 F)
2015	-3.2 C (26.2 F)
2016	-6.9 C (19.6 F)
2017	-3.1 C (26.4 F)
2018	-2.8 C (27.0 F)
2019	-2.8 C (27.0 F)
2020	-6.2 C (20.8 F)
2021	-7.5 C (18.5 F)
2022	-3.7 C (25.3 F)
2023	-4.1 C (24.6 F)
2024	-5.4 C (22.3 F)
2025	-3.8 C (25.2 F)

Wettest day (Rx1day)

The wettest day of the year at Postmasburg, 1917 to 2025. The record is 185.7 mm (7.3 in) in 2004, marked on the chart; the median year is 39.1 mm (1.5 in).

Wettest day (Rx1day) at Postmasburg by year
Year	Wettest day (Rx1day)
1917	13.5 mm (0.5 in)
1918	76.2 mm (3.0 in)
1919	31.0 mm (1.2 in)
1920	55.9 mm (2.2 in)
1921	42.2 mm (1.7 in)
1922	39.6 mm (1.6 in)
1923	48.3 mm (1.9 in)
1924	38.6 mm (1.5 in)
1925	42.4 mm (1.7 in)
1926	20.3 mm (0.8 in)
1927	29.2 mm (1.1 in)
1928	41.9 mm (1.6 in)
1929	33.3 mm (1.3 in)
1930	17.8 mm (0.7 in)
1931	27.7 mm (1.1 in)
1932	41.7 mm (1.6 in)
1933	27.9 mm (1.1 in)
1934	38.9 mm (1.5 in)
1935	46.2 mm (1.8 in)
1936	20.8 mm (0.8 in)
1937	43.7 mm (1.7 in)
1938	39.1 mm (1.5 in)
1939	33.8 mm (1.3 in)
1940	67.3 mm (2.6 in)
1941	54.6 mm (2.1 in)
1942	66.5 mm (2.6 in)
1943	69.6 mm (2.7 in)
1944	77.5 mm (3.1 in)
1945	35.8 mm (1.4 in)
1946	26.4 mm (1.0 in)
1947	19.6 mm (0.8 in)
1948	42.4 mm (1.7 in)
1949	24.9 mm (1.0 in)
1950	46.7 mm (1.8 in)
1951	33.5 mm (1.3 in)
1952	22.1 mm (0.9 in)
1953	31.0 mm (1.2 in)
1954	47.5 mm (1.9 in)
1955	104.5 mm (4.1 in)
1956	60.0 mm (2.4 in)
1957	39.5 mm (1.6 in)
1958	56.0 mm (2.2 in)
1959	31.5 mm (1.2 in)
1960	34.0 mm (1.3 in)
1961	66.0 mm (2.6 in)
1962	31.0 mm (1.2 in)
1963	55.5 mm (2.2 in)
1964	26.0 mm (1.0 in)
1965	32.5 mm (1.3 in)
1966	32.3 mm (1.3 in)
1967	55.5 mm (2.2 in)
1968	40.0 mm (1.6 in)
1969	52.0 mm (2.0 in)
1970	99.0 mm (3.9 in)
1971	48.5 mm (1.9 in)
1972	42.5 mm (1.7 in)
1973	69.0 mm (2.7 in)
1974	41.9 mm (1.6 in)
1975	52.5 mm (2.1 in)
1976	33.0 mm (1.3 in)
1977	25.7 mm (1.0 in)
1978	65.0 mm (2.6 in)
1979	59.0 mm (2.3 in)
1980	44.0 mm (1.7 in)
1981	30.0 mm (1.2 in)
1982	47.0 mm (1.9 in)
1983	28.0 mm (1.1 in)
1984	43.0 mm (1.7 in)
1985	28.5 mm (1.1 in)
1986	24.0 mm (0.9 in)
1987	25.0 mm (1.0 in)
1988	130.0 mm (5.1 in)
1989	54.0 mm (2.1 in)
1990	30.0 mm (1.2 in)
1991	60.0 mm (2.4 in)
1998	31.2 mm (1.2 in)
1999	32.0 mm (1.3 in)
2000	30.7 mm (1.2 in)
2001	49.3 mm (1.9 in)
2002	20.3 mm (0.8 in)
2003	17.5 mm (0.7 in)
2004	185.7 mm (7.3 in)
2005	44.5 mm (1.8 in)
2006	17.3 mm (0.7 in)
2007	25.1 mm (1.0 in)
2008	68.3 mm (2.7 in)
2009	69.1 mm (2.7 in)
2010	34.3 mm (1.4 in)
2011	24.4 mm (1.0 in)
2012	17.3 mm (0.7 in)
2013	10.9 mm (0.4 in)
2014	32.0 mm (1.3 in)
2015	23.9 mm (0.9 in)
2016	29.0 mm (1.1 in)
2017	39.9 mm (1.6 in)
2018	22.1 mm (0.9 in)
2019	39.1 mm (1.5 in)
2020	53.1 mm (2.1 in)
2021	64.0 mm (2.5 in)
2022	45.0 mm (1.8 in)
2023	18.0 mm (0.7 in)
2024	15.0 mm (0.6 in)
2025	13.0 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Postmasburg, 1917 to 2025. The record is 364.0 mm (14.3 in) in 2004, marked on the chart; the median year is 57.7 mm (2.3 in).

Wettest five days (Rx5day) at Postmasburg by year
Year	Wettest five days (Rx5day)
1917	26.8 mm (1.1 in)
1918	90.7 mm (3.6 in)
1919	62.8 mm (2.5 in)
1920	162.5 mm (6.4 in)
1921	56.4 mm (2.2 in)
1922	43.4 mm (1.7 in)
1923	70.4 mm (2.8 in)
1924	73.8 mm (2.9 in)
1925	72.9 mm (2.9 in)
1926	24.4 mm (1.0 in)
1927	52.8 mm (2.1 in)
1928	48.5 mm (1.9 in)
1929	77.4 mm (3.0 in)
1930	35.1 mm (1.4 in)
1931	51.0 mm (2.0 in)
1932	46.3 mm (1.8 in)
1933	41.9 mm (1.6 in)
1934	66.1 mm (2.6 in)
1935	58.4 mm (2.3 in)
1936	39.0 mm (1.5 in)
1937	98.3 mm (3.9 in)
1938	61.8 mm (2.4 in)
1939	75.9 mm (3.0 in)
1940	110.2 mm (4.3 in)
1941	99.1 mm (3.9 in)
1942	79.2 mm (3.1 in)
1943	96.5 mm (3.8 in)
1944	105.4 mm (4.1 in)
1945	43.4 mm (1.7 in)
1946	37.6 mm (1.5 in)
1947	46.5 mm (1.8 in)
1948	63.5 mm (2.5 in)
1949	35.8 mm (1.4 in)
1950	49.0 mm (1.9 in)
1951	39.6 mm (1.6 in)
1952	30.2 mm (1.2 in)
1953	45.0 mm (1.8 in)
1954	63.0 mm (2.5 in)
1955	212.0 mm (8.3 in)
1956	107.0 mm (4.2 in)
1957	64.0 mm (2.5 in)
1958	107.0 mm (4.2 in)
1959	81.0 mm (3.2 in)
1960	41.5 mm (1.6 in)
1961	86.0 mm (3.4 in)
1962	67.0 mm (2.6 in)
1963	73.5 mm (2.9 in)
1964	48.5 mm (1.9 in)
1965	32.5 mm (1.3 in)
1966	51.3 mm (2.0 in)
1967	84.5 mm (3.3 in)
1968	57.0 mm (2.2 in)
1969	80.2 mm (3.2 in)
1970	99.0 mm (3.9 in)
1971	60.5 mm (2.4 in)
1972	92.7 mm (3.6 in)
1973	91.0 mm (3.6 in)
1974	103.9 mm (4.1 in)
1975	106.5 mm (4.2 in)
1976	59.5 mm (2.3 in)
1977	48.7 mm (1.9 in)
1978	105.0 mm (4.1 in)
1979	84.0 mm (3.3 in)
1980	60.0 mm (2.4 in)
1981	44.0 mm (1.7 in)
1982	47.0 mm (1.9 in)
1983	28.0 mm (1.1 in)
1984	69.0 mm (2.7 in)
1985	44.0 mm (1.7 in)
1986	28.5 mm (1.1 in)
1987	37.0 mm (1.5 in)
1988	205.0 mm (8.1 in)
1989	54.0 mm (2.1 in)
1990	31.0 mm (1.2 in)
1991	72.5 mm (2.9 in)
1998	12.4 mm (0.5 in)
1999	52.3 mm (2.1 in)
2000	37.4 mm (1.5 in)
2001	n/a
2002	n/a
2003	1.3 mm (0.05 in)
2004	364.0 mm (14.3 in)
2005	31.9 mm (1.3 in)
2006	29.4 mm (1.2 in)
2007	n/a
2008	n/a
2009	n/a
2010	19.9 mm (0.8 in)
2011	46.0 mm (1.8 in)
2012	n/a
2013	18.3 mm (0.7 in)
2014	45.9 mm (1.8 in)
2015	28.5 mm (1.1 in)
2016	62.2 mm (2.4 in)
2017	71.1 mm (2.8 in)
2018	38.4 mm (1.5 in)
2019	67.1 mm (2.6 in)
2020	34.5 mm (1.4 in)
2021	116.1 mm (4.6 in)
2022	72.4 mm (2.9 in)
2023	33.7 mm (1.3 in)
2024	10.2 mm (0.4 in)
2025	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Postmasburg, 1917 to 2025. The record is 183 days in 1948, marked on the chart; the median year is 78 days.

Longest dry spell (CDD) at Postmasburg by year
Year	Longest dry spell (CDD)
1917	87 days
1918	67 days
1919	102 days
1920	66 days
1921	65 days
1922	97 days
1923	146 days
1924	173 days
1925	40 days
1926	31 days
1927	100 days
1928	100 days
1929	90 days
1930	135 days
1931	109 days
1932	128 days
1933	74 days
1934	139 days
1935	64 days
1936	74 days
1937	153 days
1938	98 days
1939	35 days
1940	85 days
1941	151 days
1942	144 days
1943	69 days
1944	121 days
1945	171 days
1946	73 days
1947	53 days
1948	183 days
1949	131 days
1950	87 days
1951	105 days
1952	71 days
1953	136 days
1954	173 days
1955	88 days
1956	153 days
1957	55 days
1958	107 days
1959	123 days
1960	115 days
1961	97 days
1962	140 days
1963	63 days
1964	110 days
1965	83 days
1966	105 days
1967	67 days
1968	157 days
1969	129 days
1970	73 days
1971	71 days
1972	155 days
1973	87 days
1974	83 days
1975	64 days
1976	102 days
1977	120 days
1978	127 days
1979	53 days
1980	142 days
1981	77 days
1982	101 days
1983	95 days
1984	69 days
1985	173 days
1986	80 days
1987	95 days
1988	78 days
1989	74 days
1990	122 days
1991	97 days
1998	14 days
1999	7 days
2000	2 days
2001	3 days
2002	2 days
2003	12 days
2004	19 days
2005	22 days
2006	2 days
2007	2 days
2008	4 days
2009	1 day
2010	3 days
2011	15 days
2012	2 days
2013	2 days
2014	5 days
2015	4 days
2016	3 days
2017	3 days
2018	4 days
2019	2 days
2020	4 days
2021	3 days
2022	3 days
2023	5 days
2024	4 days
2025	3 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

69 years, 1918 to 1990

A day with at least 40.0 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 120.8 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Postmasburg: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.0 mm (1.6 in)
5 years	56.8 mm (2.2 in)
10 years	69.7 mm (2.7 in)
25 years	88.2 mm (3.5 in)
50 years	103.7 mm (4.1 in)
100 years	120.8 mm (4.8 in)	Longer than the 69 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 69 years of values from 1918 to 1990.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 130.0 mm (5.1 in) in 1988; 104.5 mm (4.1 in) in 1955; 99.0 mm (3.9 in) in 1970.

Download the Data

Data for Postmasburg standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Postmasburg threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).