Bysonder Weather Records (SF005905000)

Record envelope, standing records and threshold days for Bysonder (SF005905000), South Africa, with 74 years of record.

Key Facts for Bysonder

Bysonder (SF005905000) is a weather station in South Africa at -24.83 latitude and 28.78 longitude, 1,027 m (3,369 ft) above sea level.
The station reports from 1924 to 1997, 74 years of record.
0 records set at Bysonder still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Bysonder set a daily record precipitation of 40.0 mm (1.6 in) on 11 November 1997.

About the Station

Location: South Africa, -24.83 latitude, 28.78 longitude.
Elevation: 1,027 m (3,369 ft).
Period of record: 1924 to 1997, 74 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Bysonder. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Bysonder, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Bysonder still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Bysonder between 14 February 1955 and 31 December 1955. Each dot is a new record.

When Bysonder set new all-time records
Date	Kind	Detail
1955-02-14	Record daily precipitation	Record daily precipitation 157.5 mm (6.2 in)
1955-12-31	Record daily precipitation	Record daily precipitation 215.2 mm (8.5 in)

Wettest Day of Each Month

Dec: 215.2 mm (8.5 in)

The wettest day on record for each calendar month at Bysonder. The most was 215.2 mm (8.5 in) on 31 December 1955.

Record daily precipitation for each month at Bysonder
Month	Record daily precipitation (mm)	Date
Jan	110.0 mm (4.3 in)	8 January 1989
Feb	157.5 mm (6.2 in)	14 February 1955
Mar	103.5 mm (4.1 in)	29 March 1994
Apr	71.8 mm (2.8 in)	11 April 1954
May	85.1 mm (3.4 in)	12 May 1956
Jun	46.2 mm (1.8 in)	15 June 1944
Jul	52.0 mm (2.0 in)	3 July 1957
Aug	50.0 mm (2.0 in)	18 August 1979
Sep	54.5 mm (2.1 in)	8 September 1980
Oct	153.5 mm (6.0 in)	28 October 1964
Nov	120.0 mm (4.7 in)	27 November 1987
Dec	215.2 mm (8.5 in)	31 December 1955

Latest Records

Latest records at Bysonder
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 November 1997	Bysonder, ZA	daily rain	40.0 mm (1.6 in)	5.7 mm (0.22 in)	60 years	29 of 100 (Routine)
8 October 1997	Bysonder, ZA	daily rain	31.0 mm (1.2 in)	21.0 mm (0.8 in)	7 years	21 of 100 (Routine)
10 September 1997	Bysonder, ZA	daily rain	18.0 mm (0.7 in)	18.0 mm (0.7 in)	72 years	20 of 100 (Routine)
29 May 1997	Bysonder, ZA	daily rain	2.0 mm (0.08 in)	2.0 mm (0.08 in)	72 years	20 of 100 (Routine)
28 May 1997	Bysonder, ZA	daily rain	18.0 mm (0.7 in)	17.0 mm (0.7 in)	20 years	20 of 100 (Routine)
25 May 1997	Bysonder, ZA	daily rain	42.0 mm (1.7 in)	23.0 mm (0.9 in)	40 years	34 of 100 (Routine)
24 May 1997	Bysonder, ZA	daily rain	12.0 mm (0.5 in)	12.0 mm (0.5 in)	72 years	20 of 100 (Routine)
26 March 1997	Bysonder, ZA	daily rain	23.0 mm (0.9 in)	12.5 mm (0.5 in)	36 years	20 of 100 (Routine)
6 March 1997	Bysonder, ZA	daily rain	62.0 mm (2.4 in)	23.0 mm (0.9 in)	12 years	25 of 100 (Routine)
5 December 1996	Bysonder, ZA	daily rain	38.0 mm (1.5 in)	7.6 mm (0.30 in)	38 years	22 of 100 (Routine)
22 October 1996	Bysonder, ZA	daily rain	90.0 mm (3.5 in)	4.0 mm (0.16 in)	32 years	18 of 100 (Routine)
26 February 1996	Bysonder, ZA	daily rain	40.0 mm (1.6 in)	7.7 mm (0.30 in)	45 years	24 of 100 (Routine)
11 February 1996	Bysonder, ZA	daily rain	145.0 mm (5.7 in)	112.7 mm (4.4 in)	58 years	64 of 100 (Major)
1 February 1996	Bysonder, ZA	daily rain	31.0 mm (1.2 in)	0.5 mm (0.02 in)	37 years	18 of 100 (Routine)
25 January 1996	Bysonder, ZA	daily rain	65.0 mm (2.6 in)	33.0 mm (1.3 in)	14 years	32 of 100 (Routine)
4 September 1995	Bysonder, ZA	daily rain	6.0 mm (0.24 in)	6.0 mm (0.24 in)	69 years	20 of 100 (Routine)
24 March 1995	Bysonder, ZA	daily rain (Tie)	56.0 mm (2.2 in)	tie	2 years	1 of 100 (Routine)
23 March 1995	Bysonder, ZA	daily rain	55.0 mm (2.2 in)	42.0 mm (1.7 in)	18 years	40 of 100 (Notable)
8 February 1995	Bysonder, ZA	daily rain	70.0 mm (2.8 in)	17.0 mm (0.7 in)	19 years	21 of 100 (Routine)
30 December 1994	Bysonder, ZA	daily rain	68.0 mm (2.7 in)	31.7 mm (1.2 in)	52 years	40 of 100 (Notable)

Extremes by Year

1924 to 1997

Yearly extremes at Bysonder: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	215.2 mm (8.5 in)	1955	53.8 mm (2.1 in)	74
Wettest five days (Rx5day)	278.0 mm (10.9 in)	1989	83.2 mm (3.3 in)	74
Longest dry spell (CDD)	285 days	1972	118 days	74

Wettest day (Rx1day)

The wettest day of the year at Bysonder, 1924 to 1997. The record is 215.2 mm (8.5 in) in 1955, marked on the chart; the median year is 53.8 mm (2.1 in).

Wettest day (Rx1day) at Bysonder by year
Year	Wettest day (Rx1day)
1924	19.1 mm (0.8 in)
1925	63.5 mm (2.5 in)
1926	50.8 mm (2.0 in)
1927	53.3 mm (2.1 in)
1928	61.7 mm (2.4 in)
1929	54.9 mm (2.2 in)
1930	65.0 mm (2.6 in)
1931	51.1 mm (2.0 in)
1932	44.7 mm (1.8 in)
1933	45.7 mm (1.8 in)
1934	53.3 mm (2.1 in)
1935	39.9 mm (1.6 in)
1936	34.3 mm (1.4 in)
1937	32.3 mm (1.3 in)
1938	40.6 mm (1.6 in)
1939	48.8 mm (1.9 in)
1940	46.7 mm (1.8 in)
1941	43.2 mm (1.7 in)
1942	47.5 mm (1.9 in)
1943	32.3 mm (1.3 in)
1944	53.6 mm (2.1 in)
1945	46.2 mm (1.8 in)
1946	30.5 mm (1.2 in)
1947	62.7 mm (2.5 in)
1948	37.3 mm (1.5 in)
1949	80.8 mm (3.2 in)
1950	42.7 mm (1.7 in)
1951	63.5 mm (2.5 in)
1952	70.1 mm (2.8 in)
1953	49.7 mm (2.0 in)
1954	76.2 mm (3.0 in)
1955	215.2 mm (8.5 in)
1956	85.1 mm (3.4 in)
1957	60.5 mm (2.4 in)
1958	78.0 mm (3.1 in)
1959	77.0 mm (3.0 in)
1960	83.2 mm (3.3 in)
1961	65.0 mm (2.6 in)
1962	46.4 mm (1.8 in)
1963	62.5 mm (2.5 in)
1964	153.5 mm (6.0 in)
1965	46.0 mm (1.8 in)
1966	87.0 mm (3.4 in)
1967	63.5 mm (2.5 in)
1968	49.0 mm (1.9 in)
1969	52.3 mm (2.1 in)
1970	45.0 mm (1.8 in)
1971	41.5 mm (1.6 in)
1972	45.0 mm (1.8 in)
1973	51.2 mm (2.0 in)
1974	38.4 mm (1.5 in)
1975	90.0 mm (3.5 in)
1976	88.0 mm (3.5 in)
1977	50.0 mm (2.0 in)
1978	62.0 mm (2.4 in)
1979	83.0 mm (3.3 in)
1980	54.5 mm (2.1 in)
1981	34.0 mm (1.3 in)
1982	51.0 mm (2.0 in)
1983	53.2 mm (2.1 in)
1984	60.0 mm (2.4 in)
1985	59.0 mm (2.3 in)
1986	55.0 mm (2.2 in)
1987	120.0 mm (4.7 in)
1988	31.0 mm (1.2 in)
1989	110.0 mm (4.3 in)
1990	54.0 mm (2.1 in)
1991	41.0 mm (1.6 in)
1992	56.0 mm (2.2 in)
1993	78.0 mm (3.1 in)
1994	103.5 mm (4.1 in)
1995	70.0 mm (2.8 in)
1996	145.0 mm (5.7 in)
1997	62.0 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bysonder, 1924 to 1997. The record is 278.0 mm (10.9 in) in 1989, marked on the chart; the median year is 83.2 mm (3.3 in).

Wettest five days (Rx5day) at Bysonder by year
Year	Wettest five days (Rx5day)
1924	22.1 mm (0.9 in)
1925	114.3 mm (4.5 in)
1926	66.6 mm (2.6 in)
1927	69.5 mm (2.7 in)
1928	68.1 mm (2.7 in)
1929	54.9 mm (2.2 in)
1930	86.6 mm (3.4 in)
1931	51.1 mm (2.0 in)
1932	44.7 mm (1.8 in)
1933	82.6 mm (3.3 in)
1934	90.4 mm (3.6 in)
1935	56.9 mm (2.2 in)
1936	59.2 mm (2.3 in)
1937	73.5 mm (2.9 in)
1938	56.6 mm (2.2 in)
1939	70.9 mm (2.8 in)
1940	60.9 mm (2.4 in)
1941	78.8 mm (3.1 in)
1942	66.9 mm (2.6 in)
1943	83.7 mm (3.3 in)
1944	70.0 mm (2.8 in)
1945	73.4 mm (2.9 in)
1946	75.8 mm (3.0 in)
1947	107.4 mm (4.2 in)
1948	52.3 mm (2.1 in)
1949	163.5 mm (6.4 in)
1950	68.3 mm (2.7 in)
1951	118.3 mm (4.7 in)
1952	153.4 mm (6.0 in)
1953	102.4 mm (4.0 in)
1954	109.8 mm (4.3 in)
1955	215.2 mm (8.5 in)
1956	224.2 mm (8.8 in)
1957	60.5 mm (2.4 in)
1958	115.9 mm (4.6 in)
1959	86.3 mm (3.4 in)
1960	147.2 mm (5.8 in)
1961	94.2 mm (3.7 in)
1962	124.9 mm (4.9 in)
1963	126.8 mm (5.0 in)
1964	183.2 mm (7.2 in)
1965	64.5 mm (2.5 in)
1966	119.5 mm (4.7 in)
1967	134.5 mm (5.3 in)
1968	75.3 mm (3.0 in)
1969	91.8 mm (3.6 in)
1970	91.2 mm (3.6 in)
1971	91.2 mm (3.6 in)
1972	69.3 mm (2.7 in)
1973	92.7 mm (3.6 in)
1974	44.5 mm (1.8 in)
1975	100.5 mm (4.0 in)
1976	141.0 mm (5.6 in)
1977	69.5 mm (2.7 in)
1978	82.2 mm (3.2 in)
1979	119.0 mm (4.7 in)
1980	77.0 mm (3.0 in)
1981	52.3 mm (2.1 in)
1982	59.0 mm (2.3 in)
1983	79.7 mm (3.1 in)
1984	71.5 mm (2.8 in)
1985	127.0 mm (5.0 in)
1986	99.5 mm (3.9 in)
1987	120.0 mm (4.7 in)
1988	71.0 mm (2.8 in)
1989	278.0 mm (10.9 in)
1990	80.0 mm (3.1 in)
1991	79.0 mm (3.1 in)
1992	59.0 mm (2.3 in)
1993	92.0 mm (3.6 in)
1994	155.5 mm (6.1 in)
1995	124.0 mm (4.9 in)
1996	247.0 mm (9.7 in)
1997	138.0 mm (5.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bysonder, 1924 to 1997. The record is 285 days in 1972, marked on the chart; the median year is 118 days.

Longest dry spell (CDD) at Bysonder by year
Year	Longest dry spell (CDD)
1924	105 days
1925	82 days
1926	176 days
1927	187 days
1928	69 days
1929	118 days
1930	186 days
1931	93 days
1932	129 days
1933	196 days
1934	142 days
1935	119 days
1936	111 days
1937	167 days
1938	101 days
1939	60 days
1940	91 days
1941	192 days
1942	85 days
1943	85 days
1944	96 days
1945	139 days
1946	180 days
1947	114 days
1948	144 days
1949	107 days
1950	124 days
1951	49 days
1952	63 days
1953	155 days
1954	144 days
1955	125 days
1956	109 days
1957	54 days
1958	140 days
1959	63 days
1960	81 days
1961	64 days
1962	74 days
1963	101 days
1964	143 days
1965	163 days
1966	156 days
1967	142 days
1968	159 days
1969	129 days
1970	131 days
1971	243 days
1972	285 days
1973	162 days
1974	64 days
1975	112 days
1976	121 days
1977	107 days
1978	140 days
1979	99 days
1980	159 days
1981	49 days
1982	74 days
1983	144 days
1984	85 days
1985	154 days
1986	217 days
1987	162 days
1988	64 days
1989	86 days
1990	78 days
1991	118 days
1992	113 days
1993	95 days
1994	161 days
1995	123 days
1996	96 days
1997	100 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, 1925 to 1997

A day with at least 53.9 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 188.8 mm (7.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Bysonder: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	53.9 mm (2.1 in)
5 years	75.3 mm (3.0 in)
10 years	94.0 mm (3.7 in)
25 years	124.5 mm (4.9 in)
50 years	153.4 mm (6.0 in)
100 years	188.8 mm (7.4 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 1925 to 1997.

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: 215.2 mm (8.5 in) in 1955; 153.5 mm (6.0 in) in 1964; 145.0 mm (5.7 in) in 1996.

Download the Data

Data for Bysonder standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bysonder 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).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a