Heartsease Weather Records (SF002999000)

Record envelope, standing records and threshold days for Heartsease (SF002999000), South Africa, with 71 years of record.

Key Facts for Heartsease

Heartsease (SF002999000) is a weather station in South Africa at -29.02 latitude and 29.48 longitude, 1,167 m (3,829 ft) above sea level.
The station reports from 1927 to 1997, 71 years of record.
0 records set at Heartsease still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Heartsease set a daily record precipitation of 4.0 mm (0.16 in) on 6 September 1997.

About the Station

Location: South Africa, -29.02 latitude, 29.48 longitude.
Elevation: 1,167 m (3,829 ft).
Period of record: 1927 to 1997, 71 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 Heartsease. 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 Heartsease, 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 Heartsease still stand.

Wettest Day of Each Month

Apr: 171.5 mm (6.8 in)

The wettest day on record for each calendar month at Heartsease. The most was 171.5 mm (6.8 in) on 23 April 1943.

Record daily precipitation for each month at Heartsease
Month	Record daily precipitation (mm)	Date
Jan	155.0 mm (6.1 in)	31 January 1977
Feb	92.7 mm (3.6 in)	16 February 1938
Mar	147.0 mm (5.8 in)	4 March 1997
Apr	171.5 mm (6.8 in)	23 April 1943
May	88.9 mm (3.5 in)	6 May 1940
Jun	50.8 mm (2.0 in)	18 June 1940
Jul	72.0 mm (2.8 in)	6 July 1996
Aug	57.0 mm (2.2 in)	26 August 1970
Sep	62.0 mm (2.4 in)	28 September 1975
Oct	109.2 mm (4.3 in)	12 October 1943
Nov	106.7 mm (4.2 in)	17 November 1942
Dec	110.0 mm (4.3 in)	21 December 1978

Latest Records

Latest records at Heartsease
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
6 September 1997	Heartsease, ZA	daily rain	4.0 mm (0.16 in)	0.8 mm (0.03 in)	36 years	18 of 100 (Routine)
29 June 1997	Heartsease, ZA	daily rain	9.0 mm (0.35 in)	3.5 mm (0.14 in)	16 years	14 of 100 (Routine)
11 June 1997	Heartsease, ZA	daily rain	11.0 mm (0.4 in)	6.5 mm (0.26 in)	34 years	20 of 100 (Routine)
10 June 1997	Heartsease, ZA	daily rain	17.0 mm (0.7 in)	17.0 mm (0.7 in)	68 years	20 of 100 (Routine)
25 May 1997	Heartsease, ZA	daily rain	23.0 mm (0.9 in)	18.8 mm (0.7 in)	40 years	20 of 100 (Routine)
8 May 1997	Heartsease, ZA	daily rain	15.0 mm (0.6 in)	12.0 mm (0.5 in)	16 years	20 of 100 (Routine)
20 March 1997	Heartsease, ZA	daily rain	42.5 mm (1.7 in)	2.5 mm (0.10 in)	20 years	14 of 100 (Routine)
4 March 1997	Heartsease, ZA	monthly rain	147.0 mm (5.8 in)	37.5 mm (1.5 in)	66 years	61 of 100 (Major)
8 January 1997	Heartsease, ZA	daily rain (Tie)	40.0 mm (1.6 in)	tie	38 years	4 of 100 (Routine)
4 January 1997	Heartsease, ZA	daily rain	35.0 mm (1.4 in)	8.5 mm (0.33 in)	43 years	24 of 100 (Routine)
23 October 1996	Heartsease, ZA	daily rain	35.0 mm (1.4 in)	14.2 mm (0.6 in)	60 years	36 of 100 (Notable)
3 October 1996	Heartsease, ZA	daily rain	21.0 mm (0.8 in)	5.8 mm (0.23 in)	47 years	20 of 100 (Routine)
4 August 1996	Heartsease, ZA	daily rain	37.5 mm (1.5 in)	33.2 mm (1.3 in)	32 years	46 of 100 (Notable)
6 July 1996	Heartsease, ZA	monthly rain	72.0 mm (2.8 in)	31.4 mm (1.2 in)	56 years	64 of 100 (Major)
5 May 1996	Heartsease, ZA	daily rain	38.5 mm (1.5 in)	10.3 mm (0.4 in)	48 years	29 of 100 (Routine)
14 March 1996	Heartsease, ZA	daily rain	29.0 mm (1.1 in)	5.1 mm (0.20 in)	48 years	24 of 100 (Routine)
25 January 1996	Heartsease, ZA	daily rain (Tie)	70.0 mm (2.8 in)	tie	29 years	3 of 100 (Routine)
24 January 1996	Heartsease, ZA	daily rain	114.5 mm (4.5 in)	49.5 mm (1.9 in)	17 years	43 of 100 (Notable)
24 December 1995	Heartsease, ZA	daily rain	47.0 mm (1.9 in)	16.5 mm (0.6 in)	44 years	31 of 100 (Routine)
17 December 1995	Heartsease, ZA	daily rain	69.0 mm (2.7 in)	42.0 mm (1.7 in)	12 years	41 of 100 (Notable)

Extremes by Year

1927 to 1997

Yearly extremes at Heartsease: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	171.5 mm (6.8 in)	1943	61.0 mm (2.4 in)	71
Wettest five days (Rx5day)	261.1 mm (10.3 in)	1943	109.0 mm (4.3 in)	71
Longest dry spell (CDD)	144 days	1993	77 days	71

Wettest day (Rx1day)

The wettest day of the year at Heartsease, 1927 to 1997. The record is 171.5 mm (6.8 in) in 1943, marked on the chart; the median year is 61.0 mm (2.4 in).

Wettest day (Rx1day) at Heartsease by year
Year	Wettest day (Rx1day)
1927	18.5 mm (0.7 in)
1928	52.1 mm (2.1 in)
1929	51.8 mm (2.0 in)
1930	109.5 mm (4.3 in)
1931	56.6 mm (2.2 in)
1932	106.7 mm (4.2 in)
1933	55.9 mm (2.2 in)
1934	87.6 mm (3.4 in)
1935	48.0 mm (1.9 in)
1936	76.2 mm (3.0 in)
1937	77.0 mm (3.0 in)
1938	92.7 mm (3.6 in)
1939	69.9 mm (2.8 in)
1940	88.9 mm (3.5 in)
1941	124.5 mm (4.9 in)
1942	106.7 mm (4.2 in)
1943	171.5 mm (6.8 in)
1944	50.8 mm (2.0 in)
1945	50.8 mm (2.0 in)
1946	55.9 mm (2.2 in)
1947	71.6 mm (2.8 in)
1948	45.7 mm (1.8 in)
1949	53.3 mm (2.1 in)
1950	61.0 mm (2.4 in)
1951	30.5 mm (1.2 in)
1952	68.3 mm (2.7 in)
1953	49.5 mm (1.9 in)
1954	60.0 mm (2.4 in)
1955	86.0 mm (3.4 in)
1956	37.5 mm (1.5 in)
1957	63.8 mm (2.5 in)
1958	61.5 mm (2.4 in)
1959	50.0 mm (2.0 in)
1960	26.5 mm (1.0 in)
1961	86.0 mm (3.4 in)
1962	84.5 mm (3.3 in)
1963	55.0 mm (2.2 in)
1964	55.0 mm (2.2 in)
1965	50.5 mm (2.0 in)
1966	77.0 mm (3.0 in)
1967	78.0 mm (3.1 in)
1968	55.0 mm (2.2 in)
1969	56.5 mm (2.2 in)
1970	57.0 mm (2.2 in)
1971	60.0 mm (2.4 in)
1972	61.0 mm (2.4 in)
1973	56.0 mm (2.2 in)
1974	71.0 mm (2.8 in)
1975	78.5 mm (3.1 in)
1976	90.0 mm (3.5 in)
1977	155.0 mm (6.1 in)
1978	110.0 mm (4.3 in)
1979	55.0 mm (2.2 in)
1980	94.0 mm (3.7 in)
1981	65.0 mm (2.6 in)
1982	32.0 mm (1.3 in)
1983	60.0 mm (2.4 in)
1984	42.5 mm (1.7 in)
1985	57.0 mm (2.2 in)
1986	109.0 mm (4.3 in)
1987	47.0 mm (1.9 in)
1988	70.0 mm (2.8 in)
1989	75.0 mm (3.0 in)
1990	50.0 mm (2.0 in)
1991	52.0 mm (2.0 in)
1992	37.0 mm (1.5 in)
1993	76.0 mm (3.0 in)
1994	27.5 mm (1.1 in)
1995	69.0 mm (2.7 in)
1996	114.5 mm (4.5 in)
1997	147.0 mm (5.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Heartsease, 1927 to 1997. The record is 261.1 mm (10.3 in) in 1943, marked on the chart; the median year is 109.0 mm (4.3 in).

Wettest five days (Rx5day) at Heartsease by year
Year	Wettest five days (Rx5day)
1927	42.9 mm (1.7 in)
1928	104.2 mm (4.1 in)
1929	88.1 mm (3.5 in)
1930	171.4 mm (6.7 in)
1931	120.4 mm (4.7 in)
1932	129.8 mm (5.1 in)
1933	92.5 mm (3.6 in)
1934	134.7 mm (5.3 in)
1935	127.0 mm (5.0 in)
1936	100.4 mm (4.0 in)
1937	77.0 mm (3.0 in)
1938	114.6 mm (4.5 in)
1939	122.0 mm (4.8 in)
1940	88.9 mm (3.5 in)
1941	143.6 mm (5.7 in)
1942	125.3 mm (4.9 in)
1943	261.1 mm (10.3 in)
1944	109.0 mm (4.3 in)
1945	88.6 mm (3.5 in)
1946	94.0 mm (3.7 in)
1947	109.4 mm (4.3 in)
1948	102.9 mm (4.1 in)
1949	130.1 mm (5.1 in)
1950	90.7 mm (3.6 in)
1951	47.0 mm (1.9 in)
1952	87.7 mm (3.5 in)
1953	71.5 mm (2.8 in)
1954	95.5 mm (3.8 in)
1955	119.0 mm (4.7 in)
1956	86.5 mm (3.4 in)
1957	113.8 mm (4.5 in)
1958	129.0 mm (5.1 in)
1959	108.9 mm (4.3 in)
1960	86.0 mm (3.4 in)
1961	95.1 mm (3.7 in)
1962	143.0 mm (5.6 in)
1963	115.0 mm (4.5 in)
1964	103.9 mm (4.1 in)
1965	87.0 mm (3.4 in)
1966	174.7 mm (6.9 in)
1967	148.0 mm (5.8 in)
1968	116.5 mm (4.6 in)
1969	121.0 mm (4.8 in)
1970	101.0 mm (4.0 in)
1971	113.3 mm (4.5 in)
1972	138.5 mm (5.5 in)
1973	77.0 mm (3.0 in)
1974	133.0 mm (5.2 in)
1975	125.5 mm (4.9 in)
1976	136.5 mm (5.4 in)
1977	217.2 mm (8.6 in)
1978	160.5 mm (6.3 in)
1979	78.5 mm (3.1 in)
1980	102.5 mm (4.0 in)
1981	101.0 mm (4.0 in)
1982	64.0 mm (2.5 in)
1983	94.0 mm (3.7 in)
1984	71.0 mm (2.8 in)
1985	141.0 mm (5.6 in)
1986	135.5 mm (5.3 in)
1987	131.0 mm (5.2 in)
1988	142.5 mm (5.6 in)
1989	98.0 mm (3.9 in)
1990	74.5 mm (2.9 in)
1991	107.0 mm (4.2 in)
1992	99.5 mm (3.9 in)
1993	107.0 mm (4.2 in)
1994	52.0 mm (2.0 in)
1995	124.5 mm (4.9 in)
1996	207.5 mm (8.2 in)
1997	226.0 mm (8.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Heartsease, 1927 to 1997. The record is 144 days in 1993, marked on the chart; the median year is 77 days.

Longest dry spell (CDD) at Heartsease by year
Year	Longest dry spell (CDD)
1927	21 days
1928	83 days
1929	18 days
1930	60 days
1931	71 days
1932	116 days
1933	89 days
1934	56 days
1935	30 days
1936	79 days
1937	96 days
1938	27 days
1939	55 days
1940	42 days
1941	117 days
1942	87 days
1943	41 days
1944	92 days
1945	99 days
1946	66 days
1947	84 days
1948	137 days
1949	68 days
1950	38 days
1951	65 days
1952	48 days
1953	98 days
1954	126 days
1955	120 days
1956	108 days
1957	47 days
1958	106 days
1959	43 days
1960	43 days
1961	60 days
1962	85 days
1963	80 days
1964	51 days
1965	39 days
1966	83 days
1967	49 days
1968	84 days
1969	91 days
1970	59 days
1971	53 days
1972	74 days
1973	55 days
1974	60 days
1975	123 days
1976	120 days
1977	133 days
1978	123 days
1979	73 days
1980	136 days
1981	51 days
1982	52 days
1983	38 days
1984	77 days
1985	94 days
1986	84 days
1987	84 days
1988	69 days
1989	99 days
1990	70 days
1991	80 days
1992	123 days
1993	144 days
1994	116 days
1995	136 days
1996	48 days
1997	33 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

69 years, 1928 to 1997

A day with at least 63.2 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 176.8 mm (7.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Heartsease: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.2 mm (2.5 in)
5 years	87.5 mm (3.4 in)
10 years	105.8 mm (4.2 in)
25 years	131.8 mm (5.2 in)
50 years	153.3 mm (6.0 in)
100 years	176.8 mm (7.0 in)	Longer than the 69 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, 69 years of values from 1928 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: 171.5 mm (6.8 in) in 1943; 155.0 mm (6.1 in) in 1977; 147.0 mm (5.8 in) in 1997.

Download the Data

Data for Heartsease standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Heartsease 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