Heidelberg I Weather Records (SF004766300)

Record envelope, standing records and threshold days for Heidelberg I (SF004766300), South Africa, with 92 years of record.

Key Facts for Heidelberg I

Heidelberg I (SF004766300) is a weather station in South Africa at -26.50 latitude and 28.35 longitude, 1,540 m (5,052 ft) above sea level.
The station reports from 1905 to 1996, 92 years of record.
0 records set at Heidelberg I still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Heidelberg I set a daily record precipitation of 44.0 mm (1.7 in) on 5 April 1996.

About the Station

Location: South Africa, -26.50 latitude, 28.35 longitude.
Elevation: 1,540 m (5,052 ft).
Period of record: 1905 to 1996, 92 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 Heidelberg I. 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 Heidelberg I, 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 Heidelberg I still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Heidelberg I between 14 January 1982 and 14 January 1982. Each dot is a new record.

Wettest Day of Each Month

Jan: 122.5 mm (4.8 in)

The wettest day on record for each calendar month at Heidelberg I. The most was 122.5 mm (4.8 in) on 14 January 1982.

Record daily precipitation for each month at Heidelberg I
Month	Record daily precipitation (mm)	Date
Jan	122.5 mm (4.8 in)	14 January 1982
Feb	94.0 mm (3.7 in)	10 February 1961
Mar	109.5 mm (4.3 in)	29 March 1947
Apr	64.5 mm (2.5 in)	4 April 1958
May	84.0 mm (3.3 in)	3 May 1976
Jun	36.3 mm (1.4 in)	12 June 1944
Jul	46.2 mm (1.8 in)	7 July 1909
Aug	31.5 mm (1.2 in)	1 August 1918
Sep	60.0 mm (2.4 in)	27 September 1987
Oct	67.0 mm (2.6 in)	16 October 1978
Nov	103.6 mm (4.1 in)	19 November 1917
Dec	76.7 mm (3.0 in)	15 December 1942

Latest Records

Latest records at Heidelberg I
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
5 April 1996	Heidelberg I, ZA	daily rain	44.0 mm (1.7 in)	23.0 mm (0.9 in)	29 years	40 of 100 (Notable)
7 November 1995	Heidelberg I, ZA	daily rain	21.1 mm (0.8 in)	1.6 mm (0.06 in)	16 years	14 of 100 (Routine)
18 October 1995	Heidelberg I, ZA	daily rain	35.0 mm (1.4 in)	4.8 mm (0.19 in)	46 years	27 of 100 (Routine)
21 April 1995	Heidelberg I, ZA	daily rain	16.0 mm (0.6 in)	1.3 mm (0.05 in)	72 years	20 of 100 (Routine)
1 March 1993	Heidelberg I, ZA	daily rain	39.1 mm (1.5 in)	4.6 mm (0.18 in)	50 years	26 of 100 (Routine)
3 August 1992	Heidelberg I, ZA	daily rain	13.0 mm (0.5 in)	7.7 mm (0.30 in)	79 years	20 of 100 (Routine)
16 March 1991	Heidelberg I, ZA	daily rain	21.0 mm (0.8 in)	1.0 mm (0.04 in)	4 years	9 of 100 (Routine)
6 March 1991	Heidelberg I, ZA	daily rain	50.5 mm (2.0 in)	19.3 mm (0.8 in)	49 years	37 of 100 (Notable)
7 September 1990	Heidelberg I, ZA	daily rain	8.5 mm (0.33 in)	1.0 mm (0.04 in)	32 years	18 of 100 (Routine)
28 April 1990	Heidelberg I, ZA	daily rain	52.0 mm (2.0 in)	26.8 mm (1.1 in)	36 years	46 of 100 (Notable)
25 April 1990	Heidelberg I, ZA	daily rain	24.0 mm (0.9 in)	6.0 mm (0.24 in)	28 years	20 of 100 (Routine)
8 November 1989	Heidelberg I, ZA	daily rain	34.0 mm (1.3 in)	1.5 mm (0.06 in)	44 years	22 of 100 (Routine)
2 November 1989	Heidelberg I, ZA	daily rain	28.0 mm (1.1 in)	5.4 mm (0.21 in)	80 years	36 of 100 (Notable)
14 August 1989	Heidelberg I, ZA	daily rain	7.0 mm (0.28 in)	2.2 mm (0.09 in)	55 years	20 of 100 (Routine)
23 June 1989	Heidelberg I, ZA	daily rain	7.0 mm (0.28 in)	7.0 mm (0.28 in)	84 years	20 of 100 (Routine)
16 February 1989	Heidelberg I, ZA	daily rain	56.0 mm (2.2 in)	17.0 mm (0.7 in)	22 years	26 of 100 (Routine)
11 January 1989	Heidelberg I, ZA	daily rain (Tie)	21.0 mm (0.8 in)	tie	17 years	3 of 100 (Routine)
21 October 1988	Heidelberg I, ZA	daily rain	45.0 mm (1.8 in)	4.0 mm (0.16 in)	16 years	15 of 100 (Routine)
20 October 1988	Heidelberg I, ZA	daily rain	30.0 mm (1.2 in)	3.1 mm (0.12 in)	50 years	26 of 100 (Routine)
15 September 1988	Heidelberg I, ZA	daily rain	22.0 mm (0.9 in)	5.0 mm (0.20 in)	59 years	20 of 100 (Routine)

Extremes by Year

1905 to 1996

Yearly extremes at Heidelberg I: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	122.5 mm (4.8 in)	1982	56.3 mm (2.2 in)	92
Wettest five days (Rx5day)	208.3 mm (8.2 in)	1944	87.6 mm (3.4 in)	92
Longest dry spell (CDD)	166 days	1996	78 days	92

Wettest day (Rx1day)

The wettest day of the year at Heidelberg I, 1905 to 1996. The record is 122.5 mm (4.8 in) in 1982, marked on the chart; the median year is 56.3 mm (2.2 in).

Wettest day (Rx1day) at Heidelberg I by year
Year	Wettest day (Rx1day)
1905	35.6 mm (1.4 in)
1906	51.3 mm (2.0 in)
1907	78.7 mm (3.1 in)
1908	50.8 mm (2.0 in)
1909	121.4 mm (4.8 in)
1910	88.4 mm (3.5 in)
1911	42.4 mm (1.7 in)
1912	79.5 mm (3.1 in)
1913	44.7 mm (1.8 in)
1914	62.0 mm (2.4 in)
1915	89.4 mm (3.5 in)
1916	52.3 mm (2.1 in)
1917	103.6 mm (4.1 in)
1918	76.2 mm (3.0 in)
1919	39.4 mm (1.6 in)
1920	57.7 mm (2.3 in)
1921	53.8 mm (2.1 in)
1922	46.0 mm (1.8 in)
1923	76.7 mm (3.0 in)
1924	51.6 mm (2.0 in)
1925	29.7 mm (1.2 in)
1926	27.9 mm (1.1 in)
1927	25.1 mm (1.0 in)
1928	26.9 mm (1.1 in)
1929	43.7 mm (1.7 in)
1930	53.8 mm (2.1 in)
1931	59.9 mm (2.4 in)
1932	65.3 mm (2.6 in)
1933	62.7 mm (2.5 in)
1934	60.5 mm (2.4 in)
1935	11.4 mm (0.4 in)
1936	80.0 mm (3.1 in)
1937	43.9 mm (1.7 in)
1938	30.5 mm (1.2 in)
1939	76.2 mm (3.0 in)
1940	57.9 mm (2.3 in)
1941	44.7 mm (1.8 in)
1942	76.7 mm (3.0 in)
1943	42.7 mm (1.7 in)
1944	78.5 mm (3.1 in)
1945	62.7 mm (2.5 in)
1946	65.8 mm (2.6 in)
1947	109.5 mm (4.3 in)
1948	37.8 mm (1.5 in)
1949	62.5 mm (2.5 in)
1950	79.0 mm (3.1 in)
1951	49.8 mm (2.0 in)
1952	46.2 mm (1.8 in)
1953	43.2 mm (1.7 in)
1954	55.0 mm (2.2 in)
1955	72.1 mm (2.8 in)
1956	64.8 mm (2.6 in)
1957	32.5 mm (1.3 in)
1958	64.5 mm (2.5 in)
1959	72.0 mm (2.8 in)
1960	65.0 mm (2.6 in)
1961	94.0 mm (3.7 in)
1962	60.5 mm (2.4 in)
1963	81.0 mm (3.2 in)
1964	46.5 mm (1.8 in)
1965	50.0 mm (2.0 in)
1966	56.5 mm (2.2 in)
1967	64.0 mm (2.5 in)
1968	73.0 mm (2.9 in)
1969	34.5 mm (1.4 in)
1970	34.5 mm (1.4 in)
1971	56.0 mm (2.2 in)
1972	60.0 mm (2.4 in)
1973	40.5 mm (1.6 in)
1974	46.5 mm (1.8 in)
1975	71.2 mm (2.8 in)
1976	84.0 mm (3.3 in)
1977	57.0 mm (2.2 in)
1978	67.0 mm (2.6 in)
1979	77.5 mm (3.1 in)
1980	55.5 mm (2.2 in)
1981	51.0 mm (2.0 in)
1982	122.5 mm (4.8 in)
1983	55.0 mm (2.2 in)
1984	62.0 mm (2.4 in)
1985	85.0 mm (3.3 in)
1986	65.0 mm (2.6 in)
1987	60.0 mm (2.4 in)
1988	45.0 mm (1.8 in)
1989	56.0 mm (2.2 in)
1990	52.0 mm (2.0 in)
1991	50.5 mm (2.0 in)
1992	55.0 mm (2.2 in)
1993	39.1 mm (1.5 in)
1994	38.9 mm (1.5 in)
1995	35.0 mm (1.4 in)
1996	47.0 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Heidelberg I, 1905 to 1996. The record is 208.3 mm (8.2 in) in 1944, marked on the chart; the median year is 87.6 mm (3.4 in).

Wettest five days (Rx5day) at Heidelberg I by year
Year	Wettest five days (Rx5day)
1905	74.9 mm (2.9 in)
1906	81.1 mm (3.2 in)
1907	141.7 mm (5.6 in)
1908	85.3 mm (3.4 in)
1909	189.7 mm (7.5 in)
1910	105.9 mm (4.2 in)
1911	73.4 mm (2.9 in)
1912	130.6 mm (5.1 in)
1913	72.2 mm (2.8 in)
1914	112.8 mm (4.4 in)
1915	143.7 mm (5.7 in)
1916	94.2 mm (3.7 in)
1917	175.0 mm (6.9 in)
1918	111.5 mm (4.4 in)
1919	52.9 mm (2.1 in)
1920	100.1 mm (3.9 in)
1921	82.8 mm (3.3 in)
1922	86.1 mm (3.4 in)
1923	91.5 mm (3.6 in)
1924	116.9 mm (4.6 in)
1925	47.6 mm (1.9 in)
1926	59.7 mm (2.4 in)
1927	52.0 mm (2.0 in)
1928	62.7 mm (2.5 in)
1929	77.5 mm (3.1 in)
1930	80.2 mm (3.2 in)
1931	78.7 mm (3.1 in)
1932	72.4 mm (2.9 in)
1933	129.3 mm (5.1 in)
1934	80.4 mm (3.2 in)
1935	35.9 mm (1.4 in)
1936	125.3 mm (4.9 in)
1937	70.1 mm (2.8 in)
1938	69.6 mm (2.7 in)
1939	138.0 mm (5.4 in)
1940	86.0 mm (3.4 in)
1941	70.1 mm (2.8 in)
1942	120.2 mm (4.7 in)
1943	71.9 mm (2.8 in)
1944	208.3 mm (8.2 in)
1945	110.0 mm (4.3 in)
1946	93.0 mm (3.7 in)
1947	179.4 mm (7.1 in)
1948	66.8 mm (2.6 in)
1949	89.1 mm (3.5 in)
1950	152.4 mm (6.0 in)
1951	62.5 mm (2.5 in)
1952	76.4 mm (3.0 in)
1953	112.6 mm (4.4 in)
1954	79.2 mm (3.1 in)
1955	117.9 mm (4.6 in)
1956	89.0 mm (3.5 in)
1957	52.0 mm (2.0 in)
1958	74.5 mm (2.9 in)
1959	89.5 mm (3.5 in)
1960	103.2 mm (4.1 in)
1961	139.0 mm (5.5 in)
1962	74.5 mm (2.9 in)
1963	164.0 mm (6.5 in)
1964	78.5 mm (3.1 in)
1965	78.5 mm (3.1 in)
1966	102.5 mm (4.0 in)
1967	118.0 mm (4.6 in)
1968	152.0 mm (6.0 in)
1969	61.5 mm (2.4 in)
1970	69.5 mm (2.7 in)
1971	98.0 mm (3.9 in)
1972	141.0 mm (5.6 in)
1973	72.0 mm (2.8 in)
1974	101.5 mm (4.0 in)
1975	104.5 mm (4.1 in)
1976	111.1 mm (4.4 in)
1977	110.0 mm (4.3 in)
1978	114.5 mm (4.5 in)
1979	127.5 mm (5.0 in)
1980	79.5 mm (3.1 in)
1981	81.3 mm (3.2 in)
1982	151.5 mm (6.0 in)
1983	93.0 mm (3.7 in)
1984	77.0 mm (3.0 in)
1985	197.0 mm (7.8 in)
1986	105.0 mm (4.1 in)
1987	100.2 mm (3.9 in)
1988	114.0 mm (4.5 in)
1989	81.0 mm (3.2 in)
1990	84.5 mm (3.3 in)
1991	77.0 mm (3.0 in)
1992	69.5 mm (2.7 in)
1993	49.2 mm (1.9 in)
1994	58.9 mm (2.3 in)
1995	67.0 mm (2.6 in)
1996	76.9 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Heidelberg I, 1905 to 1996. The record is 166 days in 1996, marked on the chart; the median year is 78 days.

Longest dry spell (CDD) at Heidelberg I by year
Year	Longest dry spell (CDD)
1905	37 days
1906	70 days
1907	34 days
1908	44 days
1909	39 days
1910	102 days
1911	126 days
1912	79 days
1913	78 days
1914	60 days
1915	160 days
1916	156 days
1917	44 days
1918	87 days
1919	49 days
1920	65 days
1921	124 days
1922	69 days
1923	74 days
1924	88 days
1925	59 days
1926	76 days
1927	80 days
1928	96 days
1929	75 days
1930	66 days
1931	97 days
1932	105 days
1933	71 days
1934	45 days
1935	40 days
1936	110 days
1937	67 days
1938	29 days
1939	43 days
1940	77 days
1941	92 days
1942	59 days
1943	26 days
1944	95 days
1945	82 days
1946	67 days
1947	74 days
1948	69 days
1949	83 days
1950	52 days
1951	73 days
1952	72 days
1953	100 days
1954	112 days
1955	138 days
1956	57 days
1957	49 days
1958	98 days
1959	117 days
1960	57 days
1961	111 days
1962	123 days
1963	72 days
1964	44 days
1965	75 days
1966	107 days
1967	74 days
1968	95 days
1969	78 days
1970	40 days
1971	74 days
1972	113 days
1973	116 days
1974	93 days
1975	81 days
1976	120 days
1977	97 days
1978	72 days
1979	30 days
1980	113 days
1981	77 days
1982	95 days
1983	43 days
1984	72 days
1985	107 days
1986	85 days
1987	122 days
1988	49 days
1989	51 days
1990	126 days
1991	164 days
1992	130 days
1993	126 days
1994	150 days
1995	117 days
1996	166 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

73 years, 1908 to 1992

A day with at least 58.3 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 123.0 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Heidelberg I: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	58.3 mm (2.3 in)
5 years	75.7 mm (3.0 in)
10 years	87.2 mm (3.4 in)
25 years	101.7 mm (4.0 in)
50 years	112.4 mm (4.4 in)
100 years	123.0 mm (4.8 in)	Longer than the 73 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, 73 years of values from 1908 to 1992.

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: 122.5 mm (4.8 in) in 1982; 121.4 mm (4.8 in) in 1909; 109.5 mm (4.3 in) in 1947.

Download the Data

Data for Heidelberg I standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Heidelberg I 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 2026-10-14 (14 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