Fort Donald (Bos) Weather Records (SF001810730)

Record envelope, standing records and threshold days for Fort Donald (Bos) (SF001810730), South Africa, with 84 years of record.

Key Facts for Fort Donald (Bos)

Fort Donald (Bos) (SF001810730) is a weather station in South Africa at -30.77 latitude and 29.60 longitude, 1,212 m (3,976 ft) above sea level.
The station reports from 1914 to 1997, 84 years of record.
0 records set at Fort Donald (Bos) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Fort Donald (Bos) set a daily record precipitation of 25.0 mm (1.0 in) on 15 October 1997.

About the Station

Location: South Africa, -30.77 latitude, 29.60 longitude.
Elevation: 1,212 m (3,976 ft).
Period of record: 1914 to 1997, 84 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 Fort Donald (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 Fort Donald (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 Fort Donald (Bos) still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Fort Donald (Bos) between 17 May 1959 and 17 May 1959. Each dot is a new record.

Wettest Day of Each Month

May: 167.0 mm (6.6 in)

The wettest day on record for each calendar month at Fort Donald (Bos). The most was 167.0 mm (6.6 in) on 17 May 1959.

Record daily precipitation for each month at Fort Donald (Bos)
Month	Record daily precipitation (mm)	Date
Jan	120.0 mm (4.7 in)	17 January 1960
Feb	140.0 mm (5.5 in)	9 February 1985
Mar	86.4 mm (3.4 in)	20 March 1923
Apr	70.5 mm (2.8 in)	22 April 1978
May	167.0 mm (6.6 in)	17 May 1959
Jun	112.0 mm (4.4 in)	12 June 1997
Jul	123.2 mm (4.9 in)	21 July 1923
Aug	52.1 mm (2.1 in)	3 August 1918
Sep	152.0 mm (6.0 in)	29 September 1987
Oct	102.0 mm (4.0 in)	30 October 1985
Nov	101.6 mm (4.0 in)	30 November 1943
Dec	90.0 mm (3.5 in)	7 December 1981

Latest Records

Latest records at Fort Donald (Bos)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 October 1997	Fort Donald (Bos), ZA	daily rain	25.0 mm (1.0 in)	6.0 mm (0.24 in)	24 years	21 of 100 (Routine)
27 July 1997	Fort Donald (Bos), ZA	daily rain	14.9 mm (0.6 in)	2.9 mm (0.11 in)	14 years	14 of 100 (Routine)
29 June 1997	Fort Donald (Bos), ZA	daily rain	10.7 mm (0.4 in)	5.9 mm (0.23 in)	80 years	20 of 100 (Routine)
12 June 1997	Fort Donald (Bos), ZA	monthly rain	112.0 mm (4.4 in)	2.0 mm (0.08 in)	32 years	28 of 100 (Routine)
11 June 1997	Fort Donald (Bos), ZA	daily rain	30.0 mm (1.2 in)	0.5 mm (0.02 in)	62 years	26 of 100 (Routine)
27 May 1997	Fort Donald (Bos), ZA	daily rain	12.7 mm (0.5 in)	0.8 mm (0.03 in)	52 years	20 of 100 (Routine)
7 April 1997	Fort Donald (Bos), ZA	daily rain	21.5 mm (0.8 in)	1.0 mm (0.04 in)	20 years	15 of 100 (Routine)
25 February 1997	Fort Donald (Bos), ZA	daily rain	31.0 mm (1.2 in)	1.5 mm (0.06 in)	55 years	25 of 100 (Routine)
6 November 1996	Fort Donald (Bos), ZA	daily rain	25.5 mm (1.0 in)	6.5 mm (0.26 in)	36 years	24 of 100 (Routine)
8 July 1996	Fort Donald (Bos), ZA	daily rain	56.5 mm (2.2 in)	46.5 mm (1.8 in)	37 years	54 of 100 (Notable)
7 July 1996	Fort Donald (Bos), ZA	daily rain	24.2 mm (1.0 in)	6.2 mm (0.24 in)	64 years	20 of 100 (Routine)
3 March 1996	Fort Donald (Bos), ZA	daily rain	32.0 mm (1.3 in)	4.0 mm (0.16 in)	14 years	15 of 100 (Routine)
22 February 1996	Fort Donald (Bos), ZA	daily rain	36.8 mm (1.4 in)	7.6 mm (0.30 in)	56 years	30 of 100 (Routine)
17 June 1995	Fort Donald (Bos), ZA	daily rain	72.1 mm (2.8 in)	31.1 mm (1.2 in)	29 years	40 of 100 (Notable)
17 February 1995	Fort Donald (Bos), ZA	daily rain	29.7 mm (1.2 in)	5.6 mm (0.22 in)	67 years	32 of 100 (Routine)
25 July 1994	Fort Donald (Bos), ZA	daily rain	48.6 mm (1.9 in)	23.2 mm (0.9 in)	67 years	45 of 100 (Notable)
21 June 1994	Fort Donald (Bos), ZA	daily rain	15.5 mm (0.6 in)	12.2 mm (0.5 in)	60 years	20 of 100 (Routine)
4 February 1994	Fort Donald (Bos), ZA	daily rain	94.2 mm (3.7 in)	62.7 mm (2.5 in)	12 years	51 of 100 (Notable)
3 December 1993	Fort Donald (Bos), ZA	daily rain	36.4 mm (1.4 in)	9.8 mm (0.39 in)	2 years	18 of 100 (Routine)
21 October 1993	Fort Donald (Bos), ZA	daily rain	45.3 mm (1.8 in)	5.4 mm (0.21 in)	40 years	25 of 100 (Routine)

Extremes by Year

1914 to 1997

Yearly extremes at Fort Donald (Bos): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	167.0 mm (6.6 in)	1959	57.1 mm (2.2 in)	84
Wettest five days (Rx5day)	300.4 mm (11.8 in)	1987	100.0 mm (3.9 in)	84
Longest dry spell (CDD)	108 days	1962	39 days	84

Wettest day (Rx1day)

The wettest day of the year at Fort Donald (Bos), 1914 to 1997. The record is 167.0 mm (6.6 in) in 1959, marked on the chart; the median year is 57.1 mm (2.2 in).

Wettest day (Rx1day) at Fort Donald (Bos) by year
Year	Wettest day (Rx1day)
1914	57.2 mm (2.3 in)
1915	65.5 mm (2.6 in)
1916	56.9 mm (2.2 in)
1917	69.9 mm (2.8 in)
1918	92.2 mm (3.6 in)
1919	44.2 mm (1.7 in)
1920	96.5 mm (3.8 in)
1921	52.8 mm (2.1 in)
1922	78.0 mm (3.1 in)
1923	123.2 mm (4.9 in)
1924	48.0 mm (1.9 in)
1925	41.9 mm (1.6 in)
1926	44.5 mm (1.8 in)
1927	40.6 mm (1.6 in)
1928	38.4 mm (1.5 in)
1929	30.2 mm (1.2 in)
1930	55.4 mm (2.2 in)
1931	97.8 mm (3.9 in)
1932	60.7 mm (2.4 in)
1933	40.9 mm (1.6 in)
1934	46.5 mm (1.8 in)
1935	69.9 mm (2.8 in)
1936	51.1 mm (2.0 in)
1937	39.9 mm (1.6 in)
1938	38.4 mm (1.5 in)
1939	46.0 mm (1.8 in)
1940	62.5 mm (2.5 in)
1941	46.7 mm (1.8 in)
1942	48.3 mm (1.9 in)
1943	101.6 mm (4.0 in)
1944	40.6 mm (1.6 in)
1945	49.5 mm (1.9 in)
1946	37.1 mm (1.5 in)
1947	72.4 mm (2.9 in)
1948	61.2 mm (2.4 in)
1949	83.3 mm (3.3 in)
1950	58.4 mm (2.3 in)
1951	38.9 mm (1.5 in)
1952	37.8 mm (1.5 in)
1953	43.2 mm (1.7 in)
1954	66.3 mm (2.6 in)
1955	64.1 mm (2.5 in)
1956	50.5 mm (2.0 in)
1957	46.0 mm (1.8 in)
1958	55.5 mm (2.2 in)
1959	167.0 mm (6.6 in)
1960	120.0 mm (4.7 in)
1961	65.0 mm (2.6 in)
1962	40.0 mm (1.6 in)
1963	53.0 mm (2.1 in)
1964	110.0 mm (4.3 in)
1965	52.0 mm (2.0 in)
1966	74.5 mm (2.9 in)
1967	71.0 mm (2.8 in)
1968	59.0 mm (2.3 in)
1969	67.5 mm (2.7 in)
1970	67.0 mm (2.6 in)
1971	50.0 mm (2.0 in)
1972	82.0 mm (3.2 in)
1973	38.5 mm (1.5 in)
1974	54.5 mm (2.1 in)
1975	59.0 mm (2.3 in)
1976	81.0 mm (3.2 in)
1977	50.5 mm (2.0 in)
1978	70.5 mm (2.8 in)
1979	61.5 mm (2.4 in)
1980	60.5 mm (2.4 in)
1981	90.0 mm (3.5 in)
1982	61.5 mm (2.4 in)
1983	34.0 mm (1.3 in)
1984	90.5 mm (3.6 in)
1985	140.0 mm (5.5 in)
1986	55.0 mm (2.2 in)
1987	152.0 mm (6.0 in)
1988	52.1 mm (2.1 in)
1989	62.5 mm (2.5 in)
1990	43.7 mm (1.7 in)
1991	47.9 mm (1.9 in)
1992	39.1 mm (1.5 in)
1993	53.4 mm (2.1 in)
1994	94.2 mm (3.7 in)
1995	72.1 mm (2.8 in)
1996	56.5 mm (2.2 in)
1997	112.0 mm (4.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Fort Donald (Bos), 1914 to 1997. The record is 300.4 mm (11.8 in) in 1987, marked on the chart; the median year is 100.0 mm (3.9 in).

Wettest five days (Rx5day) at Fort Donald (Bos) by year
Year	Wettest five days (Rx5day)
1914	72.4 mm (2.9 in)
1915	155.2 mm (6.1 in)
1916	85.0 mm (3.3 in)
1917	179.4 mm (7.1 in)
1918	109.4 mm (4.3 in)
1919	82.8 mm (3.3 in)
1920	212.0 mm (8.3 in)
1921	90.4 mm (3.6 in)
1922	98.9 mm (3.9 in)
1923	163.8 mm (6.4 in)
1924	82.2 mm (3.2 in)
1925	82.7 mm (3.3 in)
1926	80.3 mm (3.2 in)
1927	92.9 mm (3.7 in)
1928	49.3 mm (1.9 in)
1929	71.6 mm (2.8 in)
1930	65.5 mm (2.6 in)
1931	122.2 mm (4.8 in)
1932	95.2 mm (3.7 in)
1933	98.1 mm (3.9 in)
1934	104.4 mm (4.1 in)
1935	95.0 mm (3.7 in)
1936	126.5 mm (5.0 in)
1937	52.4 mm (2.1 in)
1938	66.0 mm (2.6 in)
1939	109.2 mm (4.3 in)
1940	116.3 mm (4.6 in)
1941	116.1 mm (4.6 in)
1942	86.6 mm (3.4 in)
1943	139.7 mm (5.5 in)
1944	85.4 mm (3.4 in)
1945	106.4 mm (4.2 in)
1946	112.2 mm (4.4 in)
1947	129.6 mm (5.1 in)
1948	98.0 mm (3.9 in)
1949	112.8 mm (4.4 in)
1950	92.2 mm (3.6 in)
1951	73.0 mm (2.9 in)
1952	87.9 mm (3.5 in)
1953	76.4 mm (3.0 in)
1954	79.3 mm (3.1 in)
1955	143.3 mm (5.6 in)
1956	107.5 mm (4.2 in)
1957	95.0 mm (3.7 in)
1958	106.0 mm (4.2 in)
1959	222.0 mm (8.7 in)
1960	134.0 mm (5.3 in)
1961	100.0 mm (3.9 in)
1962	88.0 mm (3.5 in)
1963	129.0 mm (5.1 in)
1964	165.0 mm (6.5 in)
1965	123.0 mm (4.8 in)
1966	105.5 mm (4.2 in)
1967	120.9 mm (4.8 in)
1968	85.5 mm (3.4 in)
1969	87.0 mm (3.4 in)
1970	116.5 mm (4.6 in)
1971	82.5 mm (3.2 in)
1972	103.5 mm (4.1 in)
1973	60.0 mm (2.4 in)
1974	100.0 mm (3.9 in)
1975	171.0 mm (6.7 in)
1976	191.0 mm (7.5 in)
1977	91.5 mm (3.6 in)
1978	173.0 mm (6.8 in)
1979	79.0 mm (3.1 in)
1980	101.0 mm (4.0 in)
1981	96.5 mm (3.8 in)
1982	87.5 mm (3.4 in)
1983	60.3 mm (2.4 in)
1984	194.1 mm (7.6 in)
1985	219.3 mm (8.6 in)
1986	71.7 mm (2.8 in)
1987	300.4 mm (11.8 in)
1988	119.6 mm (4.7 in)
1989	134.5 mm (5.3 in)
1990	63.0 mm (2.5 in)
1991	79.7 mm (3.1 in)
1992	64.1 mm (2.5 in)
1993	67.6 mm (2.7 in)
1994	159.3 mm (6.3 in)
1995	104.1 mm (4.1 in)
1996	100.0 mm (3.9 in)
1997	190.1 mm (7.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Fort Donald (Bos), 1914 to 1997. The record is 108 days in 1962, marked on the chart; the median year is 39 days.

Longest dry spell (CDD) at Fort Donald (Bos) by year
Year	Longest dry spell (CDD)
1914	75 days
1915	33 days
1916	84 days
1917	29 days
1918	94 days
1919	64 days
1920	36 days
1921	38 days
1922	22 days
1923	33 days
1924	36 days
1925	50 days
1926	24 days
1927	69 days
1928	33 days
1929	31 days
1930	49 days
1931	50 days
1932	31 days
1933	76 days
1934	25 days
1935	48 days
1936	53 days
1937	30 days
1938	21 days
1939	18 days
1940	41 days
1941	53 days
1942	72 days
1943	46 days
1944	50 days
1945	97 days
1946	56 days
1947	41 days
1948	43 days
1949	51 days
1950	25 days
1951	90 days
1952	21 days
1953	84 days
1954	55 days
1955	69 days
1956	68 days
1957	23 days
1958	66 days
1959	50 days
1960	36 days
1961	32 days
1962	108 days
1963	28 days
1964	19 days
1965	31 days
1966	48 days
1967	70 days
1968	29 days
1969	37 days
1970	39 days
1971	23 days
1972	33 days
1973	69 days
1974	39 days
1975	53 days
1976	40 days
1977	52 days
1978	17 days
1979	24 days
1980	22 days
1981	42 days
1982	36 days
1983	38 days
1984	29 days
1985	55 days
1986	39 days
1987	17 days
1988	34 days
1989	47 days
1990	58 days
1991	47 days
1992	28 days
1993	60 days
1994	33 days
1995	30 days
1996	38 days
1997	25 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

80 years, 1915 to 1997

A day with at least 57.2 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 170.1 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Fort Donald (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	57.2 mm (2.3 in)
5 years	78.5 mm (3.1 in)
10 years	95.6 mm (3.8 in)
25 years	121.4 mm (4.8 in)
50 years	144.1 mm (5.7 in)
100 years	170.1 mm (6.7 in)	Longer than the 80 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, 80 years of values from 1915 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: 167.0 mm (6.6 in) in 1959; 152.0 mm (6.0 in) in 1987; 140.0 mm (5.5 in) in 1985.

Download the Data

Data for Fort Donald (Bos) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fort Donald (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 2026-10-17 (17 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