Umlaas Waterworks Weather Records (SF002407160)

Record envelope, standing records and threshold days for Umlaas Waterworks (SF002407160), South Africa, with 78 years of record.

Key Facts for Umlaas Waterworks

Umlaas Waterworks (SF002407160) is a weather station in South Africa at -29.93 latitude and 30.90 longitude, 115 m (377 ft) above sea level.
The station reports from 1919 to 1996, 78 years of record.
0 records set at Umlaas Waterworks still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Umlaas Waterworks set a daily record precipitation of 48.0 mm (1.9 in) on 26 January 1996.

About the Station

Location: South Africa, -29.93 latitude, 30.90 longitude.
Elevation: 115 m (377 ft).
Period of record: 1919 to 1996, 78 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 Umlaas Waterworks. 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 Umlaas Waterworks, 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 Umlaas Waterworks still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Umlaas Waterworks between 9 February 1985 and 9 February 1985. Each dot is a new record.

Wettest Day of Each Month

Feb: 208.5 mm (8.2 in)

The wettest day on record for each calendar month at Umlaas Waterworks. The most was 208.5 mm (8.2 in) on 9 February 1985.

Record daily precipitation for each month at Umlaas Waterworks
Month	Record daily precipitation (mm)	Date
Jan	119.6 mm (4.7 in)	23 January 1963
Feb	208.5 mm (8.2 in)	9 February 1985
Mar	174.0 mm (6.9 in)	20 March 1976
Apr	199.1 mm (7.8 in)	19 April 1948
May	161.0 mm (6.3 in)	21 May 1987
Jun	203.5 mm (8.0 in)	12 June 1935
Jul	82.8 mm (3.3 in)	9 July 1929
Aug	76.0 mm (3.0 in)	9 August 1968
Sep	207.0 mm (8.1 in)	28 September 1987
Oct	126.2 mm (5.0 in)	12 October 1970
Nov	142.5 mm (5.6 in)	29 November 1989
Dec	166.0 mm (6.5 in)	13 December 1963

Latest Records

Latest records at Umlaas Waterworks
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 January 1996	Umlaas Waterworks, ZA	daily rain	48.0 mm (1.9 in)	4.3 mm (0.17 in)	72 years	31 of 100 (Routine)
25 December 1995	Umlaas Waterworks, ZA	daily rain	50.0 mm (2.0 in)	1.5 mm (0.06 in)	12 years	11 of 100 (Routine)
17 December 1995	Umlaas Waterworks, ZA	daily rain	53.0 mm (2.1 in)	0.5 mm (0.02 in)	12 years	10 of 100 (Routine)
16 December 1995	Umlaas Waterworks, ZA	daily rain	57.0 mm (2.2 in)	35.4 mm (1.4 in)	41 years	47 of 100 (Notable)
5 December 1995	Umlaas Waterworks, ZA	daily rain	41.5 mm (1.6 in)	19.1 mm (0.8 in)	38 years	33 of 100 (Routine)
2 May 1995	Umlaas Waterworks, ZA	daily rain	15.0 mm (0.6 in)	10.0 mm (0.4 in)	24 years	18 of 100 (Routine)
26 July 1994	Umlaas Waterworks, ZA	daily rain	11.5 mm (0.5 in)	7.9 mm (0.31 in)	67 years	20 of 100 (Routine)
25 July 1994	Umlaas Waterworks, ZA	daily rain	35.0 mm (1.4 in)	13.7 mm (0.5 in)	68 years	38 of 100 (Notable)
28 June 1994	Umlaas Waterworks, ZA	daily rain	9.5 mm (0.37 in)	2.0 mm (0.08 in)	31 years	17 of 100 (Routine)
28 July 1993	Umlaas Waterworks, ZA	daily rain	22.5 mm (0.9 in)	4.0 mm (0.16 in)	14 years	14 of 100 (Routine)
7 October 1992	Umlaas Waterworks, ZA	daily rain	23.5 mm (0.9 in)	12.8 mm (0.5 in)	43 years	20 of 100 (Routine)
18 February 1992	Umlaas Waterworks, ZA	daily rain	43.5 mm (1.7 in)	1.5 mm (0.06 in)	8 years	9 of 100 (Routine)
14 November 1991	Umlaas Waterworks, ZA	daily rain	38.0 mm (1.5 in)	0.9 mm (0.04 in)	48 years	21 of 100 (Routine)
10 June 1991	Umlaas Waterworks, ZA	daily rain	12.5 mm (0.5 in)	8.7 mm (0.34 in)	9 years	13 of 100 (Routine)
10 May 1991	Umlaas Waterworks, ZA	daily rain	30.5 mm (1.2 in)	8.7 mm (0.34 in)	21 years	17 of 100 (Routine)
25 January 1991	Umlaas Waterworks, ZA	daily rain	49.5 mm (1.9 in)	6.8 mm (0.27 in)	68 years	32 of 100 (Routine)
25 March 1990	Umlaas Waterworks, ZA	daily rain	57.0 mm (2.2 in)	18.5 mm (0.7 in)	28 years	25 of 100 (Routine)
24 March 1990	Umlaas Waterworks, ZA	daily rain	120.0 mm (4.7 in)	74.0 mm (2.9 in)	64 years	66 of 100 (Major)
15 March 1990	Umlaas Waterworks, ZA	daily rain	39.5 mm (1.6 in)	17.9 mm (0.7 in)	52 years	31 of 100 (Routine)
29 November 1989	Umlaas Waterworks, ZA	monthly rain	142.5 mm (5.6 in)	37.1 mm (1.5 in)	47 years	64 of 100 (Major)

Extremes by Year

1919 to 1996

Yearly extremes at Umlaas Waterworks: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	208.5 mm (8.2 in)	1985	79.5 mm (3.1 in)	78
Wettest five days (Rx5day)	465.0 mm (18.3 in)	1987	138.6 mm (5.5 in)	78
Longest dry spell (CDD)	139 days	1992	36 days	78

Wettest day (Rx1day)

The wettest day of the year at Umlaas Waterworks, 1919 to 1996. The record is 208.5 mm (8.2 in) in 1985, marked on the chart; the median year is 79.5 mm (3.1 in).

Wettest day (Rx1day) at Umlaas Waterworks by year
Year	Wettest day (Rx1day)
1919	114.0 mm (4.5 in)
1920	51.3 mm (2.0 in)
1921	77.0 mm (3.0 in)
1922	78.2 mm (3.1 in)
1923	56.9 mm (2.2 in)
1924	54.1 mm (2.1 in)
1925	157.0 mm (6.2 in)
1926	46.0 mm (1.8 in)
1927	72.4 mm (2.9 in)
1928	64.3 mm (2.5 in)
1929	82.8 mm (3.3 in)
1930	116.1 mm (4.6 in)
1931	81.5 mm (3.2 in)
1932	49.5 mm (1.9 in)
1933	50.8 mm (2.0 in)
1934	95.8 mm (3.8 in)
1935	203.5 mm (8.0 in)
1936	137.2 mm (5.4 in)
1937	60.7 mm (2.4 in)
1938	130.6 mm (5.1 in)
1939	61.2 mm (2.4 in)
1940	132.6 mm (5.2 in)
1941	34.0 mm (1.3 in)
1942	105.4 mm (4.1 in)
1943	105.7 mm (4.2 in)
1944	71.4 mm (2.8 in)
1945	67.6 mm (2.7 in)
1946	54.4 mm (2.1 in)
1947	97.0 mm (3.8 in)
1948	199.1 mm (7.8 in)
1949	98.0 mm (3.9 in)
1950	135.4 mm (5.3 in)
1951	108.0 mm (4.3 in)
1952	54.1 mm (2.1 in)
1953	64.5 mm (2.5 in)
1954	82.0 mm (3.2 in)
1955	81.0 mm (3.2 in)
1956	97.0 mm (3.8 in)
1957	86.0 mm (3.4 in)
1958	94.0 mm (3.7 in)
1959	73.5 mm (2.9 in)
1960	44.0 mm (1.7 in)
1961	96.0 mm (3.8 in)
1962	58.0 mm (2.3 in)
1963	166.0 mm (6.5 in)
1964	80.0 mm (3.1 in)
1965	56.2 mm (2.2 in)
1966	60.4 mm (2.4 in)
1967	73.5 mm (2.9 in)
1968	151.0 mm (5.9 in)
1969	61.0 mm (2.4 in)
1970	126.2 mm (5.0 in)
1971	127.5 mm (5.0 in)
1972	45.0 mm (1.8 in)
1973	64.0 mm (2.5 in)
1974	71.0 mm (2.8 in)
1975	71.0 mm (2.8 in)
1976	174.0 mm (6.9 in)
1977	161.5 mm (6.4 in)
1978	129.0 mm (5.1 in)
1979	39.0 mm (1.5 in)
1980	121.0 mm (4.8 in)
1981	71.5 mm (2.8 in)
1982	37.5 mm (1.5 in)
1983	79.0 mm (3.1 in)
1984	160.0 mm (6.3 in)
1985	208.5 mm (8.2 in)
1986	105.7 mm (4.2 in)
1987	207.0 mm (8.1 in)
1988	122.0 mm (4.8 in)
1989	142.5 mm (5.6 in)
1990	120.0 mm (4.7 in)
1991	73.0 mm (2.9 in)
1992	43.5 mm (1.7 in)
1993	55.8 mm (2.2 in)
1994	62.5 mm (2.5 in)
1995	57.0 mm (2.2 in)
1996	48.0 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Umlaas Waterworks, 1919 to 1996. The record is 465.0 mm (18.3 in) in 1987, marked on the chart; the median year is 138.6 mm (5.5 in).

Wettest five days (Rx5day) at Umlaas Waterworks by year
Year	Wettest five days (Rx5day)
1919	158.0 mm (6.2 in)
1920	72.3 mm (2.8 in)
1921	148.9 mm (5.9 in)
1922	142.5 mm (5.6 in)
1923	92.5 mm (3.6 in)
1924	85.6 mm (3.4 in)
1925	294.3 mm (11.6 in)
1926	57.5 mm (2.3 in)
1927	157.5 mm (6.2 in)
1928	90.9 mm (3.6 in)
1929	93.2 mm (3.7 in)
1930	157.8 mm (6.2 in)
1931	126.0 mm (5.0 in)
1932	86.8 mm (3.4 in)
1933	81.1 mm (3.2 in)
1934	117.9 mm (4.6 in)
1935	416.1 mm (16.4 in)
1936	219.6 mm (8.6 in)
1937	130.6 mm (5.1 in)
1938	153.4 mm (6.0 in)
1939	87.9 mm (3.5 in)
1940	178.6 mm (7.0 in)
1941	53.8 mm (2.1 in)
1942	123.2 mm (4.9 in)
1943	157.3 mm (6.2 in)
1944	164.8 mm (6.5 in)
1945	119.7 mm (4.7 in)
1946	85.6 mm (3.4 in)
1947	118.0 mm (4.6 in)
1948	221.2 mm (8.7 in)
1949	110.7 mm (4.4 in)
1950	139.2 mm (5.5 in)
1951	139.8 mm (5.5 in)
1952	91.7 mm (3.6 in)
1953	72.5 mm (2.9 in)
1954	150.1 mm (5.9 in)
1955	161.5 mm (6.4 in)
1956	247.5 mm (9.7 in)
1957	204.5 mm (8.1 in)
1958	168.8 mm (6.6 in)
1959	145.6 mm (5.7 in)
1960	65.0 mm (2.6 in)
1961	165.0 mm (6.5 in)
1962	91.8 mm (3.6 in)
1963	189.3 mm (7.5 in)
1964	151.1 mm (5.9 in)
1965	101.2 mm (4.0 in)
1966	94.6 mm (3.7 in)
1967	95.0 mm (3.7 in)
1968	160.4 mm (6.3 in)
1969	100.5 mm (4.0 in)
1970	197.9 mm (7.8 in)
1971	143.8 mm (5.7 in)
1972	80.6 mm (3.2 in)
1973	85.5 mm (3.4 in)
1974	108.5 mm (4.3 in)
1975	131.0 mm (5.2 in)
1976	271.0 mm (10.7 in)
1977	212.0 mm (8.3 in)
1978	146.5 mm (5.8 in)
1979	49.0 mm (1.9 in)
1980	172.1 mm (6.8 in)
1981	138.0 mm (5.4 in)
1982	78.9 mm (3.1 in)
1983	84.4 mm (3.3 in)
1984	163.5 mm (6.4 in)
1985	367.0 mm (14.4 in)
1986	129.9 mm (5.1 in)
1987	465.0 mm (18.3 in)
1988	226.1 mm (8.9 in)
1989	176.0 mm (6.9 in)
1990	181.0 mm (7.1 in)
1991	142.8 mm (5.6 in)
1992	61.5 mm (2.4 in)
1993	71.0 mm (2.8 in)
1994	71.0 mm (2.8 in)
1995	148.0 mm (5.8 in)
1996	69.5 mm (2.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Umlaas Waterworks, 1919 to 1996. The record is 139 days in 1992, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Umlaas Waterworks by year
Year	Longest dry spell (CDD)
1919	38 days
1920	15 days
1921	89 days
1922	23 days
1923	32 days
1924	41 days
1925	39 days
1926	32 days
1927	33 days
1928	64 days
1929	36 days
1930	18 days
1931	67 days
1932	31 days
1933	24 days
1934	26 days
1935	25 days
1936	39 days
1937	30 days
1938	30 days
1939	35 days
1940	40 days
1941	30 days
1942	22 days
1943	20 days
1944	40 days
1945	53 days
1946	92 days
1947	23 days
1948	88 days
1949	47 days
1950	26 days
1951	66 days
1952	38 days
1953	42 days
1954	41 days
1955	37 days
1956	25 days
1957	50 days
1958	31 days
1959	49 days
1960	40 days
1961	40 days
1962	86 days
1963	34 days
1964	40 days
1965	33 days
1966	26 days
1967	42 days
1968	48 days
1969	31 days
1970	37 days
1971	34 days
1972	29 days
1973	46 days
1974	37 days
1975	68 days
1976	21 days
1977	40 days
1978	29 days
1979	18 days
1980	41 days
1981	27 days
1982	28 days
1983	21 days
1984	30 days
1985	62 days
1986	56 days
1987	21 days
1988	22 days
1989	35 days
1990	27 days
1991	33 days
1992	139 days
1993	47 days
1994	36 days
1995	42 days
1996	6 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

74 years, 1919 to 1995

A day with at least 84.4 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 255.4 mm (10.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Umlaas Waterworks: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	84.4 mm (3.3 in)
5 years	123.5 mm (4.9 in)
10 years	151.9 mm (6.0 in)
25 years	190.9 mm (7.5 in)
50 years	222.2 mm (8.7 in)
100 years	255.4 mm (10.1 in)	Longer than the 74 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, 74 years of values from 1919 to 1995.

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: 208.5 mm (8.2 in) in 1985; 207.0 mm (8.1 in) in 1987; 203.5 mm (8.0 in) in 1935.

Download the Data

Data for Umlaas Waterworks standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Umlaas Waterworks 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 2026-10-15 (15 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