Idalia Weather Records (SF004442030)

Record envelope, standing records and threshold days for Idalia (SF004442030), South Africa, with 79 years of record.

Key Facts for Idalia

Idalia (SF004442030) is a weather station in South Africa at -26.88 latitude and 30.63 longitude, 1,384 m (4,541 ft) above sea level.
The station reports from 1919 to 1997, 79 years of record.
0 records set at Idalia still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Idalia set a daily record precipitation of 87.0 mm (3.4 in) on 11 November 1997.

About the Station

Location: South Africa, -26.88 latitude, 30.63 longitude.
Elevation: 1,384 m (4,541 ft).
Period of record: 1919 to 1997, 79 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 Idalia. 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 Idalia, 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 Idalia still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Idalia between 19 February 1973 and 26 November 1975. Each dot is a new record.

When Idalia set new all-time records
Date	Kind	Detail
1973-02-19	Record daily precipitation	Record daily precipitation 147.5 mm (5.8 in)
1975-11-26	Record daily precipitation	Record daily precipitation 185.0 mm (7.3 in)

Wettest Day of Each Month

Nov: 185.0 mm (7.3 in)

The wettest day on record for each calendar month at Idalia. The most was 185.0 mm (7.3 in) on 26 November 1975.

Record daily precipitation for each month at Idalia
Month	Record daily precipitation (mm)	Date
Jan	127.0 mm (5.0 in)	29 January 1984
Feb	147.5 mm (5.8 in)	19 February 1973
Mar	126.5 mm (5.0 in)	10 March 1921
Apr	76.0 mm (3.0 in)	4 April 1973
May	44.2 mm (1.7 in)	23 May 1936
Jun	52.0 mm (2.0 in)	2 June 1989
Jul	53.3 mm (2.1 in)	3 July 1943
Aug	52.6 mm (2.1 in)	2 August 1922
Sep	62.5 mm (2.5 in)	28 September 1987
Oct	88.5 mm (3.5 in)	26 October 1964
Nov	185.0 mm (7.3 in)	26 November 1975
Dec	97.4 mm (3.8 in)	26 December 1993

Latest Records

Latest records at Idalia
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 November 1997	Idalia, ZA	daily rain	87.0 mm (3.4 in)	27.0 mm (1.1 in)	3 years	24 of 100 (Routine)
25 October 1997	Idalia, ZA	daily rain	43.0 mm (1.7 in)	11.0 mm (0.4 in)	59 years	32 of 100 (Routine)
14 October 1997	Idalia, ZA	daily rain	31.0 mm (1.2 in)	6.1 mm (0.24 in)	52 years	26 of 100 (Routine)
7 October 1997	Idalia, ZA	daily rain	26.0 mm (1.0 in)	12.5 mm (0.5 in)	2 years	17 of 100 (Routine)
26 July 1997	Idalia, ZA	daily rain	7.0 mm (0.28 in)	4.2 mm (0.17 in)	68 years	20 of 100 (Routine)
29 June 1997	Idalia, ZA	daily rain	13.0 mm (0.5 in)	10.5 mm (0.4 in)	34 years	20 of 100 (Routine)
28 June 1997	Idalia, ZA	daily rain	9.0 mm (0.35 in)	5.0 mm (0.20 in)	8 years	13 of 100 (Routine)
9 May 1997	Idalia, ZA	daily rain	10.0 mm (0.4 in)	0.5 mm (0.02 in)	4 years	8 of 100 (Routine)
8 March 1997	Idalia, ZA	daily rain	40.0 mm (1.6 in)	4.5 mm (0.18 in)	6 years	11 of 100 (Routine)
11 January 1997	Idalia, ZA	daily rain	51.0 mm (2.0 in)	17.2 mm (0.7 in)	74 years	39 of 100 (Notable)
8 January 1997	Idalia, ZA	daily rain	45.5 mm (1.8 in)	20.6 mm (0.8 in)	51 years	34 of 100 (Routine)
21 October 1996	Idalia, ZA	daily rain	44.0 mm (1.7 in)	21.5 mm (0.8 in)	38 years	35 of 100 (Notable)
23 July 1996	Idalia, ZA	daily rain	4.0 mm (0.16 in)	2.7 mm (0.11 in)	65 years	20 of 100 (Routine)
6 July 1996	Idalia, ZA	daily rain	24.0 mm (0.9 in)	24.0 mm (0.9 in)	77 years	20 of 100 (Routine)
16 May 1996	Idalia, ZA	daily rain	14.0 mm (0.6 in)	3.5 mm (0.14 in)	35 years	20 of 100 (Routine)
15 May 1996	Idalia, ZA	daily rain	17.0 mm (0.7 in)	4.0 mm (0.16 in)	24 years	18 of 100 (Routine)
14 May 1996	Idalia, ZA	daily rain	10.0 mm (0.4 in)	1.9 mm (0.07 in)	53 years	20 of 100 (Routine)
5 May 1996	Idalia, ZA	daily rain	5.5 mm (0.22 in)	0.7 mm (0.03 in)	64 years	20 of 100 (Routine)
4 March 1996	Idalia, ZA	daily rain	49.5 mm (1.9 in)	17.0 mm (0.7 in)	41 years	30 of 100 (Routine)
10 February 1996	Idalia, ZA	daily rain	98.0 mm (3.9 in)	54.3 mm (2.1 in)	44 years	52 of 100 (Notable)

Extremes by Year

1919 to 1997

Yearly extremes at Idalia: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	185.0 mm (7.3 in)	1975	58.3 mm (2.3 in)	74
Wettest five days (Rx5day)	356.0 mm (14.0 in)	1984	98.7 mm (3.9 in)	74
Longest dry spell (CDD)	161 days	1941	70 days	74

Wettest day (Rx1day)

The wettest day of the year at Idalia, 1919 to 1997. The record is 185.0 mm (7.3 in) in 1975, marked on the chart; the median year is 58.3 mm (2.3 in).

Wettest day (Rx1day) at Idalia by year
Year	Wettest day (Rx1day)
1919	33.0 mm (1.3 in)
1920	73.7 mm (2.9 in)
1921	126.5 mm (5.0 in)
1922	78.7 mm (3.1 in)
1923	35.8 mm (1.4 in)
1924	58.9 mm (2.3 in)
1925	116.1 mm (4.6 in)
1929	62.5 mm (2.5 in)
1930	41.1 mm (1.6 in)
1931	62.7 mm (2.5 in)
1932	54.9 mm (2.2 in)
1933	71.1 mm (2.8 in)
1934	75.2 mm (3.0 in)
1935	34.5 mm (1.4 in)
1936	140.5 mm (5.5 in)
1937	71.6 mm (2.8 in)
1938	57.4 mm (2.3 in)
1939	52.1 mm (2.1 in)
1940	41.9 mm (1.6 in)
1941	58.7 mm (2.3 in)
1942	62.2 mm (2.4 in)
1943	53.3 mm (2.1 in)
1944	53.8 mm (2.1 in)
1945	49.0 mm (1.9 in)
1946	55.4 mm (2.2 in)
1947	63.5 mm (2.5 in)
1948	59.7 mm (2.4 in)
1949	57.9 mm (2.3 in)
1950	94.5 mm (3.7 in)
1951	88.9 mm (3.5 in)
1952	55.4 mm (2.2 in)
1953	59.0 mm (2.3 in)
1954	50.5 mm (2.0 in)
1955	63.0 mm (2.5 in)
1956	43.5 mm (1.7 in)
1957	57.0 mm (2.2 in)
1958	39.0 mm (1.5 in)
1959	57.5 mm (2.3 in)
1960	52.5 mm (2.1 in)
1961	52.5 mm (2.1 in)
1962	69.5 mm (2.7 in)
1963	57.5 mm (2.3 in)
1964	88.5 mm (3.5 in)
1965	35.0 mm (1.4 in)
1966	46.0 mm (1.8 in)
1967	45.0 mm (1.8 in)
1968	47.0 mm (1.9 in)
1969	50.0 mm (2.0 in)
1972	125.0 mm (4.9 in)
1973	147.5 mm (5.8 in)
1974	101.6 mm (4.0 in)
1975	185.0 mm (7.3 in)
1976	31.0 mm (1.2 in)
1977	48.0 mm (1.9 in)
1978	55.0 mm (2.2 in)
1979	47.0 mm (1.9 in)
1980	104.0 mm (4.1 in)
1981	42.0 mm (1.7 in)
1982	47.0 mm (1.9 in)
1983	71.0 mm (2.8 in)
1984	127.0 mm (5.0 in)
1985	51.3 mm (2.0 in)
1986	53.0 mm (2.1 in)
1987	62.5 mm (2.5 in)
1988	70.0 mm (2.8 in)
1989	55.5 mm (2.2 in)
1990	63.5 mm (2.5 in)
1991	89.0 mm (3.5 in)
1992	55.0 mm (2.2 in)
1993	97.4 mm (3.8 in)
1994	60.0 mm (2.4 in)
1995	72.5 mm (2.9 in)
1996	98.0 mm (3.9 in)
1997	87.0 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Idalia, 1919 to 1997. The record is 356.0 mm (14.0 in) in 1984, marked on the chart; the median year is 98.7 mm (3.9 in).

Wettest five days (Rx5day) at Idalia by year
Year	Wettest five days (Rx5day)
1919	54.1 mm (2.1 in)
1920	113.8 mm (4.5 in)
1921	181.4 mm (7.1 in)
1922	111.9 mm (4.4 in)
1923	99.1 mm (3.9 in)
1924	95.0 mm (3.7 in)
1925	120.2 mm (4.7 in)
1929	102.9 mm (4.1 in)
1930	98.6 mm (3.9 in)
1931	73.9 mm (2.9 in)
1932	75.7 mm (3.0 in)
1933	87.4 mm (3.4 in)
1934	84.9 mm (3.3 in)
1935	55.3 mm (2.2 in)
1936	262.9 mm (10.4 in)
1937	105.4 mm (4.1 in)
1938	75.5 mm (3.0 in)
1939	139.3 mm (5.5 in)
1940	73.7 mm (2.9 in)
1941	82.3 mm (3.2 in)
1942	92.2 mm (3.6 in)
1943	86.4 mm (3.4 in)
1944	117.3 mm (4.6 in)
1945	71.4 mm (2.8 in)
1946	86.4 mm (3.4 in)
1947	98.8 mm (3.9 in)
1948	108.5 mm (4.3 in)
1949	103.6 mm (4.1 in)
1950	99.6 mm (3.9 in)
1951	132.1 mm (5.2 in)
1952	97.8 mm (3.9 in)
1953	74.6 mm (2.9 in)
1954	119.5 mm (4.7 in)
1955	98.5 mm (3.9 in)
1956	96.5 mm (3.8 in)
1957	105.0 mm (4.1 in)
1958	86.0 mm (3.4 in)
1959	80.0 mm (3.1 in)
1960	91.0 mm (3.6 in)
1961	110.5 mm (4.4 in)
1962	142.0 mm (5.6 in)
1963	129.5 mm (5.1 in)
1964	171.5 mm (6.8 in)
1965	68.0 mm (2.7 in)
1966	104.5 mm (4.1 in)
1967	59.0 mm (2.3 in)
1968	105.0 mm (4.1 in)
1969	87.5 mm (3.4 in)
1972	138.0 mm (5.4 in)
1973	169.0 mm (6.7 in)
1974	139.5 mm (5.5 in)
1975	227.0 mm (8.9 in)
1976	56.0 mm (2.2 in)
1977	53.0 mm (2.1 in)
1978	91.0 mm (3.6 in)
1979	69.5 mm (2.7 in)
1980	193.0 mm (7.6 in)
1981	98.0 mm (3.9 in)
1982	87.0 mm (3.4 in)
1983	120.0 mm (4.7 in)
1984	356.0 mm (14.0 in)
1985	77.5 mm (3.1 in)
1986	90.5 mm (3.6 in)
1987	111.0 mm (4.4 in)
1988	128.0 mm (5.0 in)
1989	87.5 mm (3.4 in)
1990	95.0 mm (3.7 in)
1991	106.0 mm (4.2 in)
1992	77.7 mm (3.1 in)
1993	108.0 mm (4.3 in)
1994	85.0 mm (3.3 in)
1995	133.8 mm (5.3 in)
1996	131.0 mm (5.2 in)
1997	129.0 mm (5.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Idalia, 1919 to 1997. The record is 161 days in 1941, marked on the chart; the median year is 70 days.

Longest dry spell (CDD) at Idalia by year
Year	Longest dry spell (CDD)
1919	55 days
1920	83 days
1921	105 days
1922	61 days
1923	69 days
1924	72 days
1925	33 days
1929	51 days
1930	105 days
1931	49 days
1932	91 days
1933	97 days
1934	34 days
1935	90 days
1936	107 days
1937	123 days
1938	44 days
1939	46 days
1940	71 days
1941	161 days
1942	60 days
1943	46 days
1944	88 days
1945	109 days
1946	75 days
1947	46 days
1948	69 days
1949	57 days
1950	77 days
1951	70 days
1952	73 days
1953	78 days
1954	127 days
1955	88 days
1956	52 days
1957	47 days
1958	106 days
1959	65 days
1960	73 days
1961	46 days
1962	69 days
1963	97 days
1964	98 days
1965	40 days
1966	64 days
1967	53 days
1968	77 days
1969	58 days
1972	86 days
1973	59 days
1974	98 days
1975	107 days
1976	21 days
1977	135 days
1978	61 days
1979	116 days
1980	115 days
1981	58 days
1982	125 days
1983	39 days
1984	68 days
1985	61 days
1986	76 days
1987	64 days
1988	70 days
1989	50 days
1990	81 days
1991	49 days
1992	81 days
1993	87 days
1994	96 days
1995	48 days
1996	25 days
1997	26 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

68 years, 1920 to 1997

A day with at least 59.6 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 184.6 mm (7.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Idalia: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	59.6 mm (2.3 in)
5 years	80.9 mm (3.2 in)
10 years	98.9 mm (3.9 in)
25 years	127.3 mm (5.0 in)
50 years	153.5 mm (6.0 in)
100 years	184.6 mm (7.3 in)	Longer than the 68 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, 68 years of values from 1920 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: 185.0 mm (7.3 in) in 1975; 147.5 mm (5.8 in) in 1973; 140.5 mm (5.5 in) in 1936.

Download the Data

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