Flagstaff (Tnk) Weather Records (SF001538750)

Record envelope, standing records and threshold days for Flagstaff (Tnk) (SF001538750), South Africa, with 98 years of record.

Key Facts for Flagstaff (Tnk)

Flagstaff (Tnk) (SF001538750) is a weather station in South Africa at -31.08 latitude and 29.50 longitude, 838 m (2,749 ft) above sea level.
The station reports from 1900 to 1997, 98 years of record.
0 records set at Flagstaff (Tnk) still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Flagstaff (Tnk) set a daily record precipitation of 42.5 mm (1.7 in) on 27 November 1997.

About the Station

Location: South Africa, -31.08 latitude, 29.50 longitude.
Elevation: 838 m (2,749 ft).
Period of record: 1900 to 1997, 98 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 Flagstaff (Tnk). 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 Flagstaff (Tnk), 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 Flagstaff (Tnk) still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Flagstaff (Tnk) between 6 September 1978 and 6 September 1978. Each dot is a new record.

Wettest Day of Each Month

Sep: 270.0 mm (10.6 in)

The wettest day on record for each calendar month at Flagstaff (Tnk). The most was 270.0 mm (10.6 in) on 6 September 1978.

Record daily precipitation for each month at Flagstaff (Tnk)
Month	Record daily precipitation (mm)	Date
Jan	100.6 mm (4.0 in)	13 January 1931
Feb	102.0 mm (4.0 in)	9 February 1985
Mar	100.0 mm (3.9 in)	14 March 1994
Apr	92.0 mm (3.6 in)	12 April 1964
May	160.0 mm (6.3 in)	17 May 1959
Jun	235.0 mm (9.3 in)	11 June 1902
Jul	160.5 mm (6.3 in)	14 July 1931
Aug	160.0 mm (6.3 in)	19 August 1978
Sep	270.0 mm (10.6 in)	6 September 1978
Oct	87.5 mm (3.4 in)	8 October 1971
Nov	120.4 mm (4.7 in)	26 November 1947
Dec	74.7 mm (2.9 in)	31 December 1912

Latest Records

Latest records at Flagstaff (Tnk)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 November 1997	Flagstaff (Tnk), ZA	daily rain	42.5 mm (1.7 in)	5.0 mm (0.20 in)	8 years	15 of 100 (Routine)
15 October 1997	Flagstaff (Tnk), ZA	daily rain	51.0 mm (2.0 in)	11.0 mm (0.4 in)	12 years	22 of 100 (Routine)
28 July 1997	Flagstaff (Tnk), ZA	daily rain	46.0 mm (1.8 in)	20.1 mm (0.8 in)	84 years	43 of 100 (Notable)
29 June 1997	Flagstaff (Tnk), ZA	daily rain	22.5 mm (0.9 in)	20.5 mm (0.8 in)	96 years	20 of 100 (Routine)
13 June 1997	Flagstaff (Tnk), ZA	daily rain	200.0 mm (7.9 in)	180.0 mm (7.1 in)	12 years	52 of 100 (Notable)
7 April 1997	Flagstaff (Tnk), ZA	daily rain	55.3 mm (2.2 in)	27.4 mm (1.1 in)	67 years	52 of 100 (Notable)
1 March 1997	Flagstaff (Tnk), ZA	daily rain	41.0 mm (1.6 in)	1.0 mm (0.04 in)	2 years	9 of 100 (Routine)
8 January 1997	Flagstaff (Tnk), ZA	daily rain	44.0 mm (1.7 in)	24.3 mm (1.0 in)	2 years	29 of 100 (Routine)
6 November 1996	Flagstaff (Tnk), ZA	daily rain	33.0 mm (1.3 in)	2.0 mm (0.08 in)	7 years	12 of 100 (Routine)
5 November 1996	Flagstaff (Tnk), ZA	daily rain	58.0 mm (2.3 in)	20.9 mm (0.8 in)	67 years	46 of 100 (Notable)
17 September 1996	Flagstaff (Tnk), ZA	daily rain	38.6 mm (1.5 in)	7.6 mm (0.30 in)	52 years	28 of 100 (Routine)
7 July 1996	Flagstaff (Tnk), ZA	daily rain	40.0 mm (1.6 in)	10.8 mm (0.4 in)	64 years	33 of 100 (Routine)
6 July 1996	Flagstaff (Tnk), ZA	daily rain	40.0 mm (1.6 in)	19.7 mm (0.8 in)	46 years	31 of 100 (Routine)
27 February 1996	Flagstaff (Tnk), ZA	daily rain	60.0 mm (2.4 in)	25.7 mm (1.0 in)	88 years	55 of 100 (Notable)
24 December 1995	Flagstaff (Tnk), ZA	daily rain	71.0 mm (2.8 in)	32.6 mm (1.3 in)	60 years	60 of 100 (Major)
16 December 1995	Flagstaff (Tnk), ZA	daily rain	50.0 mm (2.0 in)	11.5 mm (0.5 in)	18 years	25 of 100 (Routine)
2 December 1995	Flagstaff (Tnk), ZA	daily rain	51.5 mm (2.0 in)	12.0 mm (0.5 in)	38 years	32 of 100 (Routine)
19 November 1995	Flagstaff (Tnk), ZA	daily rain	34.0 mm (1.3 in)	15.7 mm (0.6 in)	53 years	38 of 100 (Notable)
18 October 1995	Flagstaff (Tnk), ZA	daily rain	40.0 mm (1.6 in)	3.5 mm (0.14 in)	29 years	20 of 100 (Routine)
16 September 1995	Flagstaff (Tnk), ZA	daily rain	38.5 mm (1.5 in)	8.5 mm (0.33 in)	16 years	18 of 100 (Routine)

Extremes by Year

1900 to 1997

Yearly extremes at Flagstaff (Tnk): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	270.0 mm (10.6 in)	1978	57.9 mm (2.3 in)	98
Wettest five days (Rx5day)	335.0 mm (13.2 in)	1978	99.9 mm (3.9 in)	98
Longest dry spell (CDD)	141 days	1992	46 days	98

Wettest day (Rx1day)

The wettest day of the year at Flagstaff (Tnk), 1900 to 1997. The record is 270.0 mm (10.6 in) in 1978, marked on the chart; the median year is 57.9 mm (2.3 in).

Wettest day (Rx1day) at Flagstaff (Tnk) by year
Year	Wettest day (Rx1day)
1900	33.0 mm (1.3 in)
1901	34.0 mm (1.3 in)
1902	235.0 mm (9.3 in)
1903	57.2 mm (2.3 in)
1904	40.9 mm (1.6 in)
1905	81.3 mm (3.2 in)
1906	37.3 mm (1.5 in)
1907	70.4 mm (2.8 in)
1908	52.1 mm (2.1 in)
1909	94.5 mm (3.7 in)
1910	48.3 mm (1.9 in)
1911	83.8 mm (3.3 in)
1912	74.7 mm (2.9 in)
1913	62.7 mm (2.5 in)
1914	40.9 mm (1.6 in)
1915	57.9 mm (2.3 in)
1916	51.1 mm (2.0 in)
1917	71.1 mm (2.8 in)
1918	62.2 mm (2.4 in)
1919	44.5 mm (1.8 in)
1920	71.1 mm (2.8 in)
1921	54.6 mm (2.1 in)
1922	49.5 mm (1.9 in)
1923	160.0 mm (6.3 in)
1924	41.4 mm (1.6 in)
1925	33.8 mm (1.3 in)
1926	83.8 mm (3.3 in)
1927	41.9 mm (1.6 in)
1928	56.1 mm (2.2 in)
1929	44.5 mm (1.8 in)
1930	50.3 mm (2.0 in)
1931	160.5 mm (6.3 in)
1932	97.3 mm (3.8 in)
1933	52.3 mm (2.1 in)
1934	52.3 mm (2.1 in)
1935	59.7 mm (2.4 in)
1936	53.1 mm (2.1 in)
1937	47.2 mm (1.9 in)
1938	47.0 mm (1.9 in)
1939	41.4 mm (1.6 in)
1940	71.1 mm (2.8 in)
1941	41.4 mm (1.6 in)
1942	108.0 mm (4.3 in)
1943	53.3 mm (2.1 in)
1944	57.2 mm (2.3 in)
1945	47.8 mm (1.9 in)
1946	44.2 mm (1.7 in)
1947	120.4 mm (4.7 in)
1948	58.4 mm (2.3 in)
1949	47.0 mm (1.9 in)
1950	69.9 mm (2.8 in)
1951	43.4 mm (1.7 in)
1952	76.2 mm (3.0 in)
1953	27.2 mm (1.1 in)
1954	57.9 mm (2.3 in)
1955	22.9 mm (0.9 in)
1956	51.5 mm (2.0 in)
1957	43.0 mm (1.7 in)
1958	63.5 mm (2.5 in)
1959	160.0 mm (6.3 in)
1960	40.0 mm (1.6 in)
1961	65.0 mm (2.6 in)
1962	37.0 mm (1.5 in)
1963	74.0 mm (2.9 in)
1964	107.5 mm (4.2 in)
1965	50.0 mm (2.0 in)
1966	86.5 mm (3.4 in)
1967	78.0 mm (3.1 in)
1968	45.0 mm (1.8 in)
1969	53.0 mm (2.1 in)
1970	79.0 mm (3.1 in)
1971	87.5 mm (3.4 in)
1972	48.5 mm (1.9 in)
1973	38.5 mm (1.5 in)
1974	41.5 mm (1.6 in)
1975	63.0 mm (2.5 in)
1976	77.5 mm (3.1 in)
1977	53.0 mm (2.1 in)
1978	270.0 mm (10.6 in)
1979	90.0 mm (3.5 in)
1980	74.0 mm (2.9 in)
1981	40.0 mm (1.6 in)
1982	40.0 mm (1.6 in)
1983	85.0 mm (3.3 in)
1984	90.1 mm (3.5 in)
1985	102.0 mm (4.0 in)
1986	76.0 mm (3.0 in)
1987	124.0 mm (4.9 in)
1988	55.0 mm (2.2 in)
1989	70.5 mm (2.8 in)
1990	60.0 mm (2.4 in)
1991	71.0 mm (2.8 in)
1992	55.0 mm (2.2 in)
1993	62.0 mm (2.4 in)
1994	100.0 mm (3.9 in)
1995	95.9 mm (3.8 in)
1996	60.6 mm (2.4 in)
1997	200.0 mm (7.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Flagstaff (Tnk), 1900 to 1997. The record is 335.0 mm (13.2 in) in 1978, marked on the chart; the median year is 99.9 mm (3.9 in).

Wettest five days (Rx5day) at Flagstaff (Tnk) by year
Year	Wettest five days (Rx5day)
1900	59.6 mm (2.3 in)
1901	75.4 mm (3.0 in)
1902	291.9 mm (11.5 in)
1903	128.9 mm (5.1 in)
1904	102.4 mm (4.0 in)
1905	110.7 mm (4.4 in)
1906	66.0 mm (2.6 in)
1907	106.5 mm (4.2 in)
1908	108.0 mm (4.3 in)
1909	134.8 mm (5.3 in)
1910	96.9 mm (3.8 in)
1911	236.6 mm (9.3 in)
1912	116.6 mm (4.6 in)
1913	151.6 mm (6.0 in)
1914	76.5 mm (3.0 in)
1915	132.3 mm (5.2 in)
1916	83.1 mm (3.3 in)
1917	124.7 mm (4.9 in)
1918	90.2 mm (3.6 in)
1919	70.9 mm (2.8 in)
1920	172.5 mm (6.8 in)
1921	77.2 mm (3.0 in)
1922	49.5 mm (1.9 in)
1923	188.7 mm (7.4 in)
1924	99.3 mm (3.9 in)
1925	89.8 mm (3.5 in)
1926	93.5 mm (3.7 in)
1927	99.8 mm (3.9 in)
1928	99.5 mm (3.9 in)
1929	74.5 mm (2.9 in)
1930	85.2 mm (3.4 in)
1931	177.3 mm (7.0 in)
1932	148.5 mm (5.8 in)
1933	72.1 mm (2.8 in)
1934	91.6 mm (3.6 in)
1935	103.6 mm (4.1 in)
1936	131.0 mm (5.2 in)
1937	70.4 mm (2.8 in)
1938	64.6 mm (2.5 in)
1939	78.0 mm (3.1 in)
1940	115.6 mm (4.6 in)
1941	67.9 mm (2.7 in)
1942	203.3 mm (8.0 in)
1943	87.1 mm (3.4 in)
1944	127.3 mm (5.0 in)
1945	108.9 mm (4.3 in)
1946	88.4 mm (3.5 in)
1947	184.1 mm (7.2 in)
1948	130.3 mm (5.1 in)
1949	85.1 mm (3.4 in)
1950	97.8 mm (3.9 in)
1951	66.6 mm (2.6 in)
1952	88.4 mm (3.5 in)
1953	45.5 mm (1.8 in)
1954	61.7 mm (2.4 in)
1955	25.4 mm (1.0 in)
1956	104.5 mm (4.1 in)
1957	57.0 mm (2.2 in)
1958	152.5 mm (6.0 in)
1959	234.5 mm (9.2 in)
1960	58.5 mm (2.3 in)
1961	86.5 mm (3.4 in)
1962	78.5 mm (3.1 in)
1963	137.5 mm (5.4 in)
1964	197.5 mm (7.8 in)
1965	129.0 mm (5.1 in)
1966	118.5 mm (4.7 in)
1967	105.0 mm (4.1 in)
1968	60.0 mm (2.4 in)
1969	161.0 mm (6.3 in)
1970	144.0 mm (5.7 in)
1971	137.0 mm (5.4 in)
1972	90.0 mm (3.5 in)
1973	64.0 mm (2.5 in)
1974	80.5 mm (3.2 in)
1975	110.3 mm (4.3 in)
1976	175.5 mm (6.9 in)
1977	100.5 mm (4.0 in)
1978	335.0 mm (13.2 in)
1979	90.0 mm (3.5 in)
1980	82.5 mm (3.2 in)
1981	68.5 mm (2.7 in)
1982	80.0 mm (3.1 in)
1983	160.0 mm (6.3 in)
1984	94.6 mm (3.7 in)
1985	185.5 mm (7.3 in)
1986	85.5 mm (3.4 in)
1987	323.3 mm (12.7 in)
1988	93.1 mm (3.7 in)
1989	116.0 mm (4.6 in)
1990	110.0 mm (4.3 in)
1991	102.5 mm (4.0 in)
1992	70.0 mm (2.8 in)
1993	76.5 mm (3.0 in)
1994	149.0 mm (5.9 in)
1995	112.0 mm (4.4 in)
1996	100.0 mm (3.9 in)
1997	298.0 mm (11.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Flagstaff (Tnk), 1900 to 1997. The record is 141 days in 1992, marked on the chart; the median year is 46 days.

Longest dry spell (CDD) at Flagstaff (Tnk) by year
Year	Longest dry spell (CDD)
1900	28 days
1901	32 days
1902	36 days
1903	19 days
1904	91 days
1905	29 days
1906	53 days
1907	84 days
1908	47 days
1909	45 days
1910	48 days
1911	45 days
1912	37 days
1913	26 days
1914	49 days
1915	31 days
1916	103 days
1917	27 days
1918	30 days
1919	73 days
1920	69 days
1921	82 days
1922	35 days
1923	33 days
1924	42 days
1925	57 days
1926	29 days
1927	70 days
1928	33 days
1929	29 days
1930	31 days
1931	51 days
1932	42 days
1933	80 days
1934	44 days
1935	38 days
1936	53 days
1937	29 days
1938	33 days
1939	23 days
1940	43 days
1941	37 days
1942	73 days
1943	45 days
1944	30 days
1945	33 days
1946	44 days
1947	33 days
1948	86 days
1949	55 days
1950	27 days
1951	38 days
1952	31 days
1953	38 days
1954	43 days
1955	64 days
1956	67 days
1957	23 days
1958	47 days
1959	49 days
1960	47 days
1961	47 days
1962	103 days
1963	35 days
1964	33 days
1965	30 days
1966	72 days
1967	36 days
1968	82 days
1969	40 days
1970	57 days
1971	23 days
1972	45 days
1973	97 days
1974	95 days
1975	84 days
1976	53 days
1977	53 days
1978	60 days
1979	48 days
1980	57 days
1981	55 days
1982	22 days
1983	62 days
1984	38 days
1985	76 days
1986	83 days
1987	46 days
1988	34 days
1989	49 days
1990	68 days
1991	122 days
1992	141 days
1993	59 days
1994	90 days
1995	86 days
1996	95 days
1997	43 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

86 years, 1900 to 1997

A day with at least 60.6 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 250.5 mm (9.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Flagstaff (Tnk): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	60.6 mm (2.4 in)
5 years	89.0 mm (3.5 in)
10 years	114.6 mm (4.5 in)
25 years	157.3 mm (6.2 in)
50 years	198.8 mm (7.8 in)
100 years	250.5 mm (9.9 in)	Longer than the 86 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, 86 years of values from 1900 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: 270.0 mm (10.6 in) in 1978; 235.0 mm (9.3 in) in 1902; 200.0 mm (7.9 in) in 1997.

Download the Data

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