Colwana (Bos) Weather Records (SF001793440)

Record envelope, standing records and threshold days for Colwana (Bos) (SF001793440), South Africa, with 72 years of record.

Key Facts for Colwana (Bos)

Colwana (Bos) (SF001793440) is a weather station in South Africa at -30.75 latitude and 28.72 longitude, 1,728 m (5,669 ft) above sea level.
The station reports from 1926 to 1997, 72 years of record.
0 records set at Colwana (Bos) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Colwana (Bos) set a daily record precipitation of 52.1 mm (2.1 in) on 14 October 1997.

About the Station

Location: South Africa, -30.75 latitude, 28.72 longitude.
Elevation: 1,728 m (5,669 ft).
Period of record: 1926 to 1997, 72 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 Colwana (Bos). 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 Colwana (Bos), 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 Colwana (Bos) still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Colwana (Bos) between 15 February 1995 and 15 February 1995. Each dot is a new record.

Wettest Day of Each Month

Feb: 124.9 mm (4.9 in)

The wettest day on record for each calendar month at Colwana (Bos). The most was 124.9 mm (4.9 in) on 15 February 1995.

Record daily precipitation for each month at Colwana (Bos)
Month	Record daily precipitation (mm)	Date
Jan	115.0 mm (4.5 in)	26 January 1955
Feb	124.9 mm (4.9 in)	15 February 1995
Mar	99.3 mm (3.9 in)	21 March 1940
Apr	74.0 mm (2.9 in)	2 April 1953
May	106.5 mm (4.2 in)	21 May 1954
Jun	100.0 mm (3.9 in)	19 June 1964
Jul	57.0 mm (2.2 in)	7 July 1996
Aug	62.2 mm (2.4 in)	23 August 1943
Sep	104.3 mm (4.1 in)	29 September 1987
Oct	102.1 mm (4.0 in)	3 October 1945
Nov	90.0 mm (3.5 in)	20 November 1985
Dec	96.9 mm (3.8 in)	14 December 1993

Latest Records

Latest records at Colwana (Bos)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 October 1997	Colwana (Bos), ZA	daily rain	52.1 mm (2.1 in)	12.6 mm (0.5 in)	36 years	29 of 100 (Routine)
16 September 1997	Colwana (Bos), ZA	daily rain	90.7 mm (3.6 in)	79.2 mm (3.1 in)	31 years	56 of 100 (Notable)
4 August 1997	Colwana (Bos), ZA	daily rain	26.0 mm (1.0 in)	18.6 mm (0.7 in)	68 years	43 of 100 (Notable)
26 July 1997	Colwana (Bos), ZA	daily rain	13.5 mm (0.5 in)	3.5 mm (0.14 in)	24 years	16 of 100 (Routine)
29 June 1997	Colwana (Bos), ZA	daily rain	20.0 mm (0.8 in)	13.9 mm (0.5 in)	62 years	20 of 100 (Routine)
13 June 1997	Colwana (Bos), ZA	daily rain	45.0 mm (1.8 in)	37.1 mm (1.5 in)	52 years	47 of 100 (Notable)
12 June 1997	Colwana (Bos), ZA	daily rain	60.0 mm (2.4 in)	34.6 mm (1.4 in)	62 years	48 of 100 (Notable)
11 June 1997	Colwana (Bos), ZA	daily rain	52.0 mm (2.0 in)	22.8 mm (0.9 in)	58 years	39 of 100 (Notable)
1 May 1997	Colwana (Bos), ZA	daily rain	8.3 mm (0.33 in)	0.7 mm (0.03 in)	68 years	20 of 100 (Routine)
20 April 1997	Colwana (Bos), ZA	daily rain	11.0 mm (0.4 in)	2.0 mm (0.08 in)	36 years	18 of 100 (Routine)
27 December 1996	Colwana (Bos), ZA	daily rain	58.3 mm (2.3 in)	17.7 mm (0.7 in)	70 years	41 of 100 (Notable)
15 November 1996	Colwana (Bos), ZA	daily rain	22.4 mm (0.9 in)	0.4 mm (0.02 in)	28 years	15 of 100 (Routine)
6 November 1996	Colwana (Bos), ZA	daily rain	22.9 mm (0.9 in)	0.3 mm (0.01 in)	65 years	20 of 100 (Routine)
7 July 1996	Colwana (Bos), ZA	monthly rain	57.0 mm (2.2 in)	1.1 mm (0.04 in)	65 years	36 of 100 (Notable)
24 June 1996	Colwana (Bos), ZA	daily rain	18.0 mm (0.7 in)	7.0 mm (0.28 in)	25 years	18 of 100 (Routine)
24 May 1996	Colwana (Bos), ZA	daily rain	5.5 mm (0.22 in)	0.4 mm (0.02 in)	50 years	20 of 100 (Routine)
27 January 1996	Colwana (Bos), ZA	daily rain	80.8 mm (3.2 in)	34.3 mm (1.4 in)	40 years	43 of 100 (Notable)
25 January 1996	Colwana (Bos), ZA	daily rain	46.0 mm (1.8 in)	11.7 mm (0.5 in)	68 years	35 of 100 (Notable)
16 November 1995	Colwana (Bos), ZA	daily rain	27.0 mm (1.1 in)	7.0 mm (0.28 in)	4 years	13 of 100 (Routine)
16 June 1995	Colwana (Bos), ZA	daily rain	19.0 mm (0.7 in)	19.0 mm (0.7 in)	68 years	20 of 100 (Routine)

Extremes by Year

1926 to 1997

Yearly extremes at Colwana (Bos): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	124.9 mm (4.9 in)	1995	62.9 mm (2.5 in)	72
Wettest five days (Rx5day)	235.9 mm (9.3 in)	1931	120.8 mm (4.8 in)	72
Longest dry spell (CDD)	195 days	1985	47 days	72

Wettest day (Rx1day)

The wettest day of the year at Colwana (Bos), 1926 to 1997. The record is 124.9 mm (4.9 in) in 1995, marked on the chart; the median year is 62.9 mm (2.5 in).

Wettest day (Rx1day) at Colwana (Bos) by year
Year	Wettest day (Rx1day)
1926	40.6 mm (1.6 in)
1927	81.3 mm (3.2 in)
1928	50.0 mm (2.0 in)
1929	49.5 mm (1.9 in)
1930	58.7 mm (2.3 in)
1931	60.5 mm (2.4 in)
1932	59.9 mm (2.4 in)
1933	50.8 mm (2.0 in)
1934	121.2 mm (4.8 in)
1935	37.8 mm (1.5 in)
1936	55.9 mm (2.2 in)
1937	68.3 mm (2.7 in)
1938	55.9 mm (2.2 in)
1939	117.3 mm (4.6 in)
1940	104.1 mm (4.1 in)
1941	93.7 mm (3.7 in)
1942	53.8 mm (2.1 in)
1943	62.2 mm (2.4 in)
1944	63.5 mm (2.5 in)
1945	102.1 mm (4.0 in)
1946	44.2 mm (1.7 in)
1947	56.9 mm (2.2 in)
1948	53.8 mm (2.1 in)
1949	57.7 mm (2.3 in)
1950	55.4 mm (2.2 in)
1951	68.6 mm (2.7 in)
1952	78.7 mm (3.1 in)
1953	98.0 mm (3.9 in)
1954	106.5 mm (4.2 in)
1955	115.0 mm (4.5 in)
1956	64.5 mm (2.5 in)
1957	56.5 mm (2.2 in)
1958	57.5 mm (2.3 in)
1959	99.5 mm (3.9 in)
1960	60.0 mm (2.4 in)
1961	64.5 mm (2.5 in)
1962	56.5 mm (2.2 in)
1963	86.0 mm (3.4 in)
1964	100.0 mm (3.9 in)
1965	60.0 mm (2.4 in)
1966	90.0 mm (3.5 in)
1967	61.0 mm (2.4 in)
1968	40.0 mm (1.6 in)
1969	56.5 mm (2.2 in)
1970	47.0 mm (1.9 in)
1971	55.0 mm (2.2 in)
1972	69.0 mm (2.7 in)
1973	77.0 mm (3.0 in)
1974	88.0 mm (3.5 in)
1975	80.0 mm (3.1 in)
1976	83.0 mm (3.3 in)
1977	59.0 mm (2.3 in)
1978	66.0 mm (2.6 in)
1979	47.5 mm (1.9 in)
1980	64.0 mm (2.5 in)
1981	96.1 mm (3.8 in)
1982	51.0 mm (2.0 in)
1983	60.1 mm (2.4 in)
1984	53.0 mm (2.1 in)
1985	107.0 mm (4.2 in)
1986	96.5 mm (3.8 in)
1987	104.3 mm (4.1 in)
1988	57.0 mm (2.2 in)
1989	58.9 mm (2.3 in)
1990	52.0 mm (2.0 in)
1991	90.0 mm (3.5 in)
1992	35.0 mm (1.4 in)
1993	96.9 mm (3.8 in)
1994	70.5 mm (2.8 in)
1995	124.9 mm (4.9 in)
1996	83.5 mm (3.3 in)
1997	90.7 mm (3.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Colwana (Bos), 1926 to 1997. The record is 235.9 mm (9.3 in) in 1931, marked on the chart; the median year is 120.8 mm (4.8 in).

Wettest five days (Rx5day) at Colwana (Bos) by year
Year	Wettest five days (Rx5day)
1926	59.7 mm (2.4 in)
1927	190.5 mm (7.5 in)
1928	88.9 mm (3.5 in)
1929	117.2 mm (4.6 in)
1930	109.3 mm (4.3 in)
1931	235.9 mm (9.3 in)
1932	114.7 mm (4.5 in)
1933	90.1 mm (3.5 in)
1934	155.0 mm (6.1 in)
1935	77.5 mm (3.1 in)
1936	122.5 mm (4.8 in)
1937	124.2 mm (4.9 in)
1938	98.6 mm (3.9 in)
1939	190.2 mm (7.5 in)
1940	184.8 mm (7.3 in)
1941	137.9 mm (5.4 in)
1942	130.8 mm (5.1 in)
1943	127.8 mm (5.0 in)
1944	200.4 mm (7.9 in)
1945	121.9 mm (4.8 in)
1946	106.4 mm (4.2 in)
1947	128.5 mm (5.1 in)
1948	117.1 mm (4.6 in)
1949	80.6 mm (3.2 in)
1950	93.0 mm (3.7 in)
1951	112.5 mm (4.4 in)
1952	119.7 mm (4.7 in)
1953	128.5 mm (5.1 in)
1954	147.0 mm (5.8 in)
1955	234.0 mm (9.2 in)
1956	116.5 mm (4.6 in)
1957	92.5 mm (3.6 in)
1958	131.0 mm (5.2 in)
1959	180.0 mm (7.1 in)
1960	90.5 mm (3.6 in)
1961	83.0 mm (3.3 in)
1962	119.5 mm (4.7 in)
1963	159.5 mm (6.3 in)
1964	177.6 mm (7.0 in)
1965	101.0 mm (4.0 in)
1966	126.0 mm (5.0 in)
1967	108.0 mm (4.3 in)
1968	88.0 mm (3.5 in)
1969	115.5 mm (4.5 in)
1970	97.4 mm (3.8 in)
1971	73.0 mm (2.9 in)
1972	104.5 mm (4.1 in)
1973	139.2 mm (5.5 in)
1974	123.5 mm (4.9 in)
1975	180.9 mm (7.1 in)
1976	222.0 mm (8.7 in)
1977	109.8 mm (4.3 in)
1978	134.0 mm (5.3 in)
1979	91.5 mm (3.6 in)
1980	100.5 mm (4.0 in)
1981	117.5 mm (4.6 in)
1982	83.0 mm (3.3 in)
1983	84.1 mm (3.3 in)
1984	119.5 mm (4.7 in)
1985	207.0 mm (8.1 in)
1986	144.5 mm (5.7 in)
1987	222.6 mm (8.8 in)
1988	106.1 mm (4.2 in)
1989	130.1 mm (5.1 in)
1990	98.3 mm (3.9 in)
1991	170.0 mm (6.7 in)
1992	78.0 mm (3.1 in)
1993	127.2 mm (5.0 in)
1994	221.0 mm (8.7 in)
1995	173.9 mm (6.8 in)
1996	196.4 mm (7.7 in)
1997	157.0 mm (6.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Colwana (Bos), 1926 to 1997. The record is 195 days in 1985, marked on the chart; the median year is 47 days.

Longest dry spell (CDD) at Colwana (Bos) by year
Year	Longest dry spell (CDD)
1926	22 days
1927	69 days
1928	28 days
1929	19 days
1930	29 days
1931	33 days
1932	35 days
1933	110 days
1934	29 days
1935	32 days
1936	53 days
1937	70 days
1938	20 days
1939	26 days
1940	44 days
1941	32 days
1942	73 days
1943	26 days
1944	31 days
1945	43 days
1946	53 days
1947	23 days
1948	45 days
1949	52 days
1950	23 days
1951	41 days
1952	24 days
1953	52 days
1954	65 days
1955	84 days
1956	105 days
1957	50 days
1958	50 days
1959	47 days
1960	97 days
1961	56 days
1962	118 days
1963	73 days
1964	51 days
1965	37 days
1966	69 days
1967	33 days
1968	34 days
1969	63 days
1970	31 days
1971	23 days
1972	46 days
1973	69 days
1974	39 days
1975	93 days
1976	40 days
1977	66 days
1978	46 days
1979	75 days
1980	69 days
1981	29 days
1982	36 days
1983	40 days
1984	54 days
1985	195 days
1986	29 days
1987	32 days
1988	34 days
1989	156 days
1990	49 days
1991	113 days
1992	87 days
1993	103 days
1994	49 days
1995	61 days
1996	71 days
1997	40 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

70 years, 1927 to 1997

A day with at least 68.0 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 146.4 mm (5.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Colwana (Bos): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	68.0 mm (2.7 in)
5 years	88.3 mm (3.5 in)
10 years	102.0 mm (4.0 in)
25 years	119.6 mm (4.7 in)
50 years	133.0 mm (5.2 in)
100 years	146.4 mm (5.8 in)	Longer than the 70 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, 70 years of values from 1927 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: 124.9 mm (4.9 in) in 1995; 121.2 mm (4.8 in) in 1934; 117.3 mm (4.6 in) in 1939.

Download the Data

Data for Colwana (Bos) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Colwana (Bos) 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 2026-10-16 (16 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