Thornlea Weather Records (SF002840080)

Record envelope, standing records and threshold days for Thornlea (SF002840080), South Africa, with 99 years of record.

Key Facts for Thornlea

Thornlea (SF002840080) is a weather station in South Africa at -28.65 latitude and 21.52 longitude, 914 m (2,999 ft) above sea level.
The station reports from 1899 to 1997, 99 years of record.
0 records set at Thornlea still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Thornlea set a daily record precipitation of 22.5 mm (0.9 in) on 30 October 1997.

About the Station

Location: South Africa, -28.65 latitude, 21.52 longitude.
Elevation: 914 m (2,999 ft).
Period of record: 1899 to 1997, 99 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 Thornlea. 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 Thornlea, 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 Thornlea still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Thornlea between 1 February 1934 and 1 February 1934. Each dot is a new record.

Wettest Day of Each Month

Feb: 83.8 mm (3.3 in)

The wettest day on record for each calendar month at Thornlea. The most was 83.8 mm (3.3 in) on 1 February 1934.

Record daily precipitation for each month at Thornlea
Month	Record daily precipitation (mm)	Date
Jan	77.7 mm (3.1 in)	5 January 1944
Feb	83.8 mm (3.3 in)	1 February 1934
Mar	59.7 mm (2.4 in)	12 March 1948
Apr	63.0 mm (2.5 in)	1 April 1953
May	49.5 mm (1.9 in)	10 May 1935
Jun	19.1 mm (0.8 in)	5 June 1913
Jul	38.1 mm (1.5 in)	5 July 1938
Aug	37.5 mm (1.5 in)	26 August 1957
Sep	42.7 mm (1.7 in)	17 September 1929
Oct	35.0 mm (1.4 in)	19 October 1981
Nov	66.7 mm (2.6 in)	11 November 1968
Dec	59.9 mm (2.4 in)	3 December 1900

Latest Records

Latest records at Thornlea
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 October 1997	Thornlea, ZA	daily rain	22.5 mm (0.9 in)	12.7 mm (0.5 in)	31 years	20 of 100 (Routine)
16 September 1997	Thornlea, ZA	daily rain	5.7 mm (0.22 in)	5.7 mm (0.22 in)	97 years	20 of 100 (Routine)
18 March 1997	Thornlea, ZA	daily rain	33.7 mm (1.3 in)	21.4 mm (0.8 in)	4 years	28 of 100 (Routine)
7 November 1996	Thornlea, ZA	daily rain	14.3 mm (0.6 in)	5.3 mm (0.21 in)	8 years	16 of 100 (Routine)
6 November 1996	Thornlea, ZA	daily rain	7.0 mm (0.28 in)	1.4 mm (0.06 in)	72 years	20 of 100 (Routine)
23 July 1996	Thornlea, ZA	daily rain	13.4 mm (0.5 in)	13.2 mm (0.5 in)	4 years	20 of 100 (Routine)
22 July 1996	Thornlea, ZA	daily rain	1.7 mm (0.07 in)	0.9 mm (0.04 in)	4 years	11 of 100 (Routine)
27 February 1996	Thornlea, ZA	daily rain	21.7 mm (0.9 in)	6.5 mm (0.26 in)	77 years	20 of 100 (Routine)
13 January 1996	Thornlea, ZA	daily rain	15.3 mm (0.6 in)	1.0 mm (0.04 in)	20 years	15 of 100 (Routine)
12 December 1995	Thornlea, ZA	daily rain	46.0 mm (1.8 in)	37.0 mm (1.5 in)	41 years	61 of 100 (Major)
20 November 1995	Thornlea, ZA	daily rain	12.7 mm (0.5 in)	1.0 mm (0.04 in)	81 years	20 of 100 (Routine)
19 September 1995	Thornlea, ZA	daily rain	0.7 mm (0.03 in)	0.7 mm (0.03 in)	95 years	20 of 100 (Routine)
20 August 1995	Thornlea, ZA	daily rain	5.0 mm (0.20 in)	0.2 mm (0.01 in)	64 years	20 of 100 (Routine)
29 March 1995	Thornlea, ZA	daily rain	18.9 mm (0.7 in)	3.2 mm (0.13 in)	76 years	20 of 100 (Routine)
5 December 1994	Thornlea, ZA	daily rain	21.0 mm (0.8 in)	8.8 mm (0.35 in)	72 years	20 of 100 (Routine)
7 October 1994	Thornlea, ZA	daily rain	12.0 mm (0.5 in)	0.1 mm (0.00 in)	57 years	20 of 100 (Routine)
22 September 1994	Thornlea, ZA	daily rain (Tie)	2.5 mm (0.10 in)	tie	11 years	3 of 100 (Routine)
25 July 1994	Thornlea, ZA	daily rain	1.0 mm (0.04 in)	1.0 mm (0.04 in)	93 years	20 of 100 (Routine)
5 February 1994	Thornlea, ZA	daily rain	31.3 mm (1.2 in)	5.6 mm (0.22 in)	38 years	25 of 100 (Routine)
10 November 1993	Thornlea, ZA	daily rain	8.0 mm (0.31 in)	0.6 mm (0.02 in)	30 years	18 of 100 (Routine)

Extremes by Year

1899 to 1997

Yearly extremes at Thornlea: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	83.8 mm (3.3 in)	1934	33.8 mm (1.3 in)	98
Wettest five days (Rx5day)	106.7 mm (4.2 in)	1900	45.8 mm (1.8 in)	98
Longest dry spell (CDD)	259 days	1903	115 days	98

Wettest day (Rx1day)

The wettest day of the year at Thornlea, 1899 to 1997. The record is 83.8 mm (3.3 in) in 1934, marked on the chart; the median year is 33.8 mm (1.3 in).

Wettest day (Rx1day) at Thornlea by year
Year	Wettest day (Rx1day)
1899	17.8 mm (0.7 in)
1900	59.9 mm (2.4 in)
1901	21.6 mm (0.9 in)
1902	18.5 mm (0.7 in)
1903	11.7 mm (0.5 in)
1904	37.6 mm (1.5 in)
1905	17.8 mm (0.7 in)
1906	32.3 mm (1.3 in)
1907	62.2 mm (2.4 in)
1908	18.8 mm (0.7 in)
1909	30.5 mm (1.2 in)
1910	17.3 mm (0.7 in)
1911	34.5 mm (1.4 in)
1912	24.9 mm (1.0 in)
1913	22.4 mm (0.9 in)
1914	15.2 mm (0.6 in)
1915	33.8 mm (1.3 in)
1917	36.1 mm (1.4 in)
1918	50.8 mm (2.0 in)
1919	35.8 mm (1.4 in)
1920	34.8 mm (1.4 in)
1921	43.4 mm (1.7 in)
1922	5.8 mm (0.23 in)
1923	45.7 mm (1.8 in)
1924	20.3 mm (0.8 in)
1925	44.2 mm (1.7 in)
1926	35.6 mm (1.4 in)
1927	21.8 mm (0.9 in)
1928	34.0 mm (1.3 in)
1929	47.0 mm (1.9 in)
1930	25.9 mm (1.0 in)
1931	47.5 mm (1.9 in)
1932	37.6 mm (1.5 in)
1933	26.2 mm (1.0 in)
1934	83.8 mm (3.3 in)
1935	49.5 mm (1.9 in)
1936	24.9 mm (1.0 in)
1937	28.7 mm (1.1 in)
1938	38.1 mm (1.5 in)
1939	28.4 mm (1.1 in)
1940	46.5 mm (1.8 in)
1941	54.1 mm (2.1 in)
1942	18.0 mm (0.7 in)
1943	30.5 mm (1.2 in)
1944	77.7 mm (3.1 in)
1945	23.1 mm (0.9 in)
1946	21.6 mm (0.9 in)
1947	12.7 mm (0.5 in)
1948	59.7 mm (2.4 in)
1949	32.3 mm (1.3 in)
1950	45.7 mm (1.8 in)
1951	10.9 mm (0.4 in)
1952	24.9 mm (1.0 in)
1953	63.0 mm (2.5 in)
1954	40.8 mm (1.6 in)
1955	58.0 mm (2.3 in)
1956	32.5 mm (1.3 in)
1957	53.5 mm (2.1 in)
1958	25.5 mm (1.0 in)
1959	21.2 mm (0.8 in)
1960	10.3 mm (0.4 in)
1961	47.3 mm (1.9 in)
1962	13.9 mm (0.5 in)
1963	32.8 mm (1.3 in)
1964	38.8 mm (1.5 in)
1965	32.1 mm (1.3 in)
1966	26.1 mm (1.0 in)
1967	49.6 mm (2.0 in)
1968	66.7 mm (2.6 in)
1969	48.9 mm (1.9 in)
1970	48.1 mm (1.9 in)
1971	59.2 mm (2.3 in)
1972	36.7 mm (1.4 in)
1973	37.1 mm (1.5 in)
1974	65.8 mm (2.6 in)
1975	59.6 mm (2.3 in)
1976	43.6 mm (1.7 in)
1977	40.6 mm (1.6 in)
1978	31.3 mm (1.2 in)
1979	28.6 mm (1.1 in)
1980	46.4 mm (1.8 in)
1981	38.8 mm (1.5 in)
1982	48.5 mm (1.9 in)
1983	28.5 mm (1.1 in)
1984	11.5 mm (0.5 in)
1985	23.3 mm (0.9 in)
1986	10.2 mm (0.4 in)
1987	30.0 mm (1.2 in)
1988	41.3 mm (1.6 in)
1989	37.7 mm (1.5 in)
1990	23.0 mm (0.9 in)
1991	56.5 mm (2.2 in)
1992	23.5 mm (0.9 in)
1993	28.0 mm (1.1 in)
1994	31.3 mm (1.2 in)
1995	46.0 mm (1.8 in)
1996	21.7 mm (0.9 in)
1997	33.7 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Thornlea, 1899 to 1997. The record is 106.7 mm (4.2 in) in 1900, marked on the chart; the median year is 45.8 mm (1.8 in).

Wettest five days (Rx5day) at Thornlea by year
Year	Wettest five days (Rx5day)
1899	17.8 mm (0.7 in)
1900	106.7 mm (4.2 in)
1901	32.6 mm (1.3 in)
1902	21.0 mm (0.8 in)
1903	13.5 mm (0.5 in)
1904	47.0 mm (1.9 in)
1905	17.8 mm (0.7 in)
1906	44.2 mm (1.7 in)
1907	74.9 mm (2.9 in)
1908	46.3 mm (1.8 in)
1909	34.8 mm (1.4 in)
1910	27.2 mm (1.1 in)
1911	52.0 mm (2.0 in)
1912	29.5 mm (1.2 in)
1913	22.4 mm (0.9 in)
1914	20.5 mm (0.8 in)
1915	64.6 mm (2.5 in)
1917	58.2 mm (2.3 in)
1918	78.6 mm (3.1 in)
1919	62.7 mm (2.5 in)
1920	43.4 mm (1.7 in)
1921	43.4 mm (1.7 in)
1922	9.4 mm (0.37 in)
1923	45.7 mm (1.8 in)
1924	25.6 mm (1.0 in)
1925	85.1 mm (3.4 in)
1926	45.5 mm (1.8 in)
1927	35.3 mm (1.4 in)
1928	52.1 mm (2.1 in)
1929	63.0 mm (2.5 in)
1930	29.2 mm (1.1 in)
1931	47.5 mm (1.9 in)
1932	37.6 mm (1.5 in)
1933	49.6 mm (2.0 in)
1934	83.8 mm (3.3 in)
1935	67.8 mm (2.7 in)
1936	47.0 mm (1.9 in)
1937	35.3 mm (1.4 in)
1938	50.5 mm (2.0 in)
1939	56.7 mm (2.2 in)
1940	55.6 mm (2.2 in)
1941	83.3 mm (3.3 in)
1942	47.0 mm (1.9 in)
1943	36.3 mm (1.4 in)
1944	77.7 mm (3.1 in)
1945	23.1 mm (0.9 in)
1946	39.4 mm (1.6 in)
1947	19.3 mm (0.8 in)
1948	86.3 mm (3.4 in)
1949	40.3 mm (1.6 in)
1950	65.1 mm (2.6 in)
1951	20.0 mm (0.8 in)
1952	41.7 mm (1.6 in)
1953	76.2 mm (3.0 in)
1954	78.2 mm (3.1 in)
1955	84.0 mm (3.3 in)
1956	99.6 mm (3.9 in)
1957	56.0 mm (2.2 in)
1958	25.7 mm (1.0 in)
1959	34.2 mm (1.3 in)
1960	10.8 mm (0.4 in)
1961	51.0 mm (2.0 in)
1962	17.8 mm (0.7 in)
1963	48.3 mm (1.9 in)
1964	45.0 mm (1.8 in)
1965	44.2 mm (1.7 in)
1966	26.1 mm (1.0 in)
1967	94.0 mm (3.7 in)
1968	66.9 mm (2.6 in)
1969	62.4 mm (2.5 in)
1970	97.1 mm (3.8 in)
1971	59.2 mm (2.3 in)
1972	71.2 mm (2.8 in)
1973	39.2 mm (1.5 in)
1974	100.8 mm (4.0 in)
1975	102.7 mm (4.0 in)
1976	64.5 mm (2.5 in)
1977	45.9 mm (1.8 in)
1978	38.1 mm (1.5 in)
1979	34.6 mm (1.4 in)
1980	66.1 mm (2.6 in)
1981	43.8 mm (1.7 in)
1982	54.7 mm (2.2 in)
1983	33.5 mm (1.3 in)
1984	32.0 mm (1.3 in)
1985	40.3 mm (1.6 in)
1986	15.5 mm (0.6 in)
1987	38.5 mm (1.5 in)
1988	45.0 mm (1.8 in)
1989	80.0 mm (3.1 in)
1990	41.8 mm (1.6 in)
1991	93.3 mm (3.7 in)
1992	26.0 mm (1.0 in)
1993	36.4 mm (1.4 in)
1994	49.9 mm (2.0 in)
1995	67.5 mm (2.7 in)
1996	37.8 mm (1.5 in)
1997	62.0 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Thornlea, 1899 to 1997. The record is 259 days in 1903, marked on the chart; the median year is 115 days.

Longest dry spell (CDD) at Thornlea by year
Year	Longest dry spell (CDD)
1899	27 days
1900	97 days
1901	63 days
1902	92 days
1903	259 days
1904	144 days
1905	97 days
1906	115 days
1907	124 days
1908	90 days
1909	184 days
1910	61 days
1911	84 days
1912	169 days
1913	97 days
1914	113 days
1915	118 days
1917	141 days
1918	74 days
1919	183 days
1920	127 days
1921	149 days
1922	166 days
1923	117 days
1924	197 days
1925	126 days
1926	141 days
1927	114 days
1928	96 days
1929	56 days
1930	137 days
1931	79 days
1932	129 days
1933	145 days
1934	131 days
1935	158 days
1936	106 days
1937	198 days
1938	40 days
1939	69 days
1940	122 days
1941	228 days
1942	145 days
1943	84 days
1944	117 days
1945	120 days
1946	103 days
1947	166 days
1948	173 days
1949	78 days
1950	107 days
1951	135 days
1952	110 days
1953	120 days
1954	181 days
1955	82 days
1956	150 days
1957	94 days
1958	171 days
1959	122 days
1960	159 days
1961	81 days
1962	148 days
1963	74 days
1964	71 days
1965	146 days
1966	127 days
1967	88 days
1968	156 days
1969	128 days
1970	67 days
1971	74 days
1972	138 days
1973	74 days
1974	83 days
1975	67 days
1976	119 days
1977	112 days
1978	125 days
1979	67 days
1980	71 days
1981	78 days
1982	62 days
1983	97 days
1984	129 days
1985	155 days
1986	143 days
1987	68 days
1988	108 days
1989	60 days
1990	141 days
1991	97 days
1992	193 days
1993	78 days
1994	98 days
1995	89 days
1996	46 days
1997	94 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

95 years, 1900 to 1997

A day with at least 34.4 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 79.1 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Thornlea: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	34.4 mm (1.4 in)
5 years	48.7 mm (1.9 in)
10 years	57.2 mm (2.3 in)
25 years	66.8 mm (2.6 in)
50 years	73.3 mm (2.9 in)
100 years	79.1 mm (3.1 in)	Longer than the 95 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, 95 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: 83.8 mm (3.3 in) in 1934; 77.7 mm (3.1 in) in 1944; 66.7 mm (2.6 in) in 1968.

Download the Data

Data for Thornlea standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Thornlea 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 2026-10-13 (13 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