Daily records
Page built 2026-10-15
Data as of 2025-12-31
Search
Built 2026-10-15 (15 October 2026)

Zwartmodder Weather Records (SF003160610)

Record envelope, standing records and threshold days for Zwartmodder (SF003160610), South Africa, with 55 years of record.

Key Facts for Zwartmodder

  • Zwartmodder (SF003160610) is a weather station in South Africa at -28.03 latitude and 20.55 longitude, 786 m (2,579 ft) above sea level.
  • The station reports from 1920 to 1974, 55 years of record.
  • 0 records set at Zwartmodder still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Zwartmodder set a daily record precipitation of 15.0 mm (0.6 in) on 11 February 1974.

About the Station

  • Location: South Africa, -28.03 latitude, 20.55 longitude.
  • Elevation: 786 m (2,579 ft).
  • Period of record: 1920 to 1974, 55 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Zwartmodder, with 2026 drawn through them The band shows the record high and record low for each calendar day at Zwartmodder. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Zwartmodder. 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 Zwartmodder, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Zwartmodder by the year they were set 0 records at Zwartmodder still stand. 00000000000
0 records at Zwartmodder still stand.
Standing records at Zwartmodder by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Zwartmodder set new all-time records 1 all-time records were set at Zwartmodder between 30 January 1955 and 30 January 1955. Each dot is a new record. Record daily precipitation30 January 1955: Record daily precipitation 140.0 mm (5.5 in)1955
1 all-time records were set at Zwartmodder between 30 January 1955 and 30 January 1955. Each dot is a new record.
When Zwartmodder set new all-time records
DateKindDetail
1955-01-30Record daily precipitationRecord daily precipitation 140.0 mm (5.5 in)

Wettest Day of Each Month

Jan: 140.0 mm (5.5 in)
Record daily precipitation for each month at Zwartmodder The wettest day on record for each calendar month at Zwartmodder. The most was 140.0 mm (5.5 in) on 30 January 1955. 050100150 Jan: 140.0 mm (5.5 in), 30 January 1955 Jan Feb: 114.3 mm (4.5 in), 16 February 1938 Feb Mar: 63.5 mm (2.5 in), 16 March 1940 Mar Apr: 49.0 mm (1.9 in), 15 April 1965 Apr May: 51.1 mm (2.0 in), 5 May 1921 May Jun: 18.0 mm (0.7 in), 18 June 1959 Jun Jul: 17.0 mm (0.7 in), 6 July 1938 Jul Aug: 14.0 mm (0.6 in), 11 August 1949 Aug Sep: 76.0 mm (3.0 in), 11 September 1962 Sep Oct: 39.9 mm (1.6 in), 20 October 1927 Oct Nov: 38.1 mm (1.5 in), 1 November 1934 Nov Dec: 42.0 mm (1.7 in), 30 December 1957 Dec
The wettest day on record for each calendar month at Zwartmodder. The most was 140.0 mm (5.5 in) on 30 January 1955.
Record daily precipitation for each month at Zwartmodder
MonthRecord daily precipitation (mm)Date
Jan140.0 mm (5.5 in)30 January 1955
Feb114.3 mm (4.5 in)16 February 1938
Mar63.5 mm (2.5 in)16 March 1940
Apr49.0 mm (1.9 in)15 April 1965
May51.1 mm (2.0 in)5 May 1921
Jun18.0 mm (0.7 in)18 June 1959
Jul17.0 mm (0.7 in)6 July 1938
Aug14.0 mm (0.6 in)11 August 1949
Sep76.0 mm (3.0 in)11 September 1962
Oct39.9 mm (1.6 in)20 October 1927
Nov38.1 mm (1.5 in)1 November 1934
Dec42.0 mm (1.7 in)30 December 1957

Latest Records

20
Latest records at Zwartmodder
DateStationRecordValueBeat old record byOld record stoodSignificance
11 February 1974Zwartmodder, ZAdaily rain15.0 mm (0.6 in)13.7 mm (0.5 in)28 years20 of 100 (Routine)
4 February 1974Zwartmodder, ZAdaily rain50.0 mm (2.0 in)29.0 mm (1.1 in)4 years27 of 100 (Routine)
2 February 1974Zwartmodder, ZAdaily rain21.5 mm (0.8 in)4.0 mm (0.16 in)52 years20 of 100 (Routine)
1 February 1974Zwartmodder, ZAdaily rain7.5 mm (0.30 in)3.7 mm (0.15 in)34 years17 of 100 (Routine)
15 January 1974Zwartmodder, ZAdaily rain36.0 mm (1.4 in)29.9 mm (1.2 in)40 years32 of 100 (Routine)
14 January 1974Zwartmodder, ZAdaily rain40.0 mm (1.6 in)38.5 mm (1.5 in)16 years30 of 100 (Routine)
1 December 1973Zwartmodder, ZAdaily rain33.2 mm (1.3 in)30.2 mm (1.2 in)2 years36 of 100 (Notable)
31 July 1973Zwartmodder, ZAdaily rain1.0 mm (0.04 in)1.0 mm (0.04 in)52 years20 of 100 (Routine)
1 July 1973Zwartmodder, ZAdaily rain5.0 mm (0.20 in)5.0 mm (0.20 in)52 years20 of 100 (Routine)
20 February 1973Zwartmodder, ZAdaily rain19.5 mm (0.8 in)5.5 mm (0.22 in)18 years14 of 100 (Routine)
6 January 1972Zwartmodder, ZAdaily rain54.0 mm (2.1 in)44.1 mm (1.7 in)28 years36 of 100 (Notable)
5 January 1972Zwartmodder, ZAdaily rain18.0 mm (0.7 in)16.7 mm (0.7 in)26 years20 of 100 (Routine)
1 December 1971Zwartmodder, ZAdaily rain3.0 mm (0.12 in)3.0 mm (0.12 in)50 years20 of 100 (Routine)
14 October 1971Zwartmodder, ZAdaily rain18.0 mm (0.7 in)3.0 mm (0.12 in)4 years9 of 100 (Routine)
19 February 1971Zwartmodder, ZAdaily rain14.0 mm (0.6 in)1.9 mm (0.07 in)1 year6 of 100 (Routine)
5 February 1971Zwartmodder, ZAdaily rain13.5 mm (0.5 in)1.3 mm (0.05 in)19 years10 of 100 (Routine)
23 December 1970Zwartmodder, ZAdaily rain14.0 mm (0.6 in)14.0 mm (0.6 in)49 years20 of 100 (Routine)
21 October 1970Zwartmodder, ZAdaily rain3.0 mm (0.12 in)2.7 mm (0.11 in)19 years13 of 100 (Routine)
27 August 1970Zwartmodder, ZAdaily rain8.0 mm (0.31 in)2.5 mm (0.10 in)16 years12 of 100 (Routine)
4 February 1970Zwartmodder, ZAdaily rain21.0 mm (0.8 in)0.7 mm (0.03 in)20 years11 of 100 (Routine)

Extremes by Year

1920 to 1974
Yearly extremes at Zwartmodder: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)140.0 mm (5.5 in)195538.0 mm (1.5 in)55
Wettest five days (Rx5day)140.0 mm (5.5 in)195540.6 mm (1.6 in)55
Longest dry spell (CDD)260 days1941141 days55

Wettest day (Rx1day)

Wettest day (Rx1day) at Zwartmodder by year The wettest day of the year at Zwartmodder, 1920 to 1974. The record is 140.0 mm (5.5 in) in 1955, marked on the chart; the median year is 38.0 mm (1.5 in). 050100150192019301940195019601970Record: 140.0 mm (5.5 in) in 1955
The wettest day of the year at Zwartmodder, 1920 to 1974. The record is 140.0 mm (5.5 in) in 1955, marked on the chart; the median year is 38.0 mm (1.5 in).
Wettest day (Rx1day) at Zwartmodder by year
YearWettest day (Rx1day)
192031.2 mm (1.2 in)
192151.1 mm (2.0 in)
192214.2 mm (0.6 in)
192327.9 mm (1.1 in)
192438.6 mm (1.5 in)
192554.9 mm (2.2 in)
192611.9 mm (0.5 in)
192739.9 mm (1.6 in)
192841.1 mm (1.6 in)
192913.7 mm (0.5 in)
193039.4 mm (1.6 in)
193133.0 mm (1.3 in)
193213.2 mm (0.5 in)
193312.7 mm (0.5 in)
193438.1 mm (1.5 in)
193538.6 mm (1.5 in)
193640.6 mm (1.6 in)
193754.1 mm (2.1 in)
1938114.3 mm (4.5 in)
193942.7 mm (1.7 in)
194063.5 mm (2.5 in)
194196.5 mm (3.8 in)
194236.1 mm (1.4 in)
194316.0 mm (0.6 in)
194438.1 mm (1.5 in)
194515.2 mm (0.6 in)
194622.9 mm (0.9 in)
194719.1 mm (0.8 in)
194835.6 mm (1.4 in)
194921.6 mm (0.9 in)
195052.1 mm (2.1 in)
195116.0 mm (0.6 in)
195216.3 mm (0.6 in)
195325.7 mm (1.0 in)
195431.0 mm (1.2 in)
1955140.0 mm (5.5 in)
195643.5 mm (1.7 in)
195742.0 mm (1.7 in)
195828.5 mm (1.1 in)
195924.0 mm (0.9 in)
196040.0 mm (1.6 in)
196123.5 mm (0.9 in)
196276.0 mm (3.0 in)
196340.0 mm (1.6 in)
196420.5 mm (0.8 in)
196553.0 mm (2.1 in)
196619.0 mm (0.7 in)
196746.0 mm (1.8 in)
196838.0 mm (1.5 in)
196939.0 mm (1.5 in)
197021.0 mm (0.8 in)
197118.0 mm (0.7 in)
197254.0 mm (2.1 in)
197333.2 mm (1.3 in)
197450.0 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Zwartmodder by year The wettest five days of the year at Zwartmodder, 1920 to 1974. The record is 140.0 mm (5.5 in) in 1955, marked on the chart; the median year is 40.6 mm (1.6 in). 050100150192019301940195019601970Record: 140.0 mm (5.5 in) in 1955
The wettest five days of the year at Zwartmodder, 1920 to 1974. The record is 140.0 mm (5.5 in) in 1955, marked on the chart; the median year is 40.6 mm (1.6 in).
Wettest five days (Rx5day) at Zwartmodder by year
YearWettest five days (Rx5day)
192039.8 mm (1.6 in)
192171.3 mm (2.8 in)
192214.2 mm (0.6 in)
192333.7 mm (1.3 in)
192474.9 mm (2.9 in)
192571.7 mm (2.8 in)
192613.2 mm (0.5 in)
192739.9 mm (1.6 in)
192857.1 mm (2.2 in)
192919.3 mm (0.8 in)
193040.2 mm (1.6 in)
193133.0 mm (1.3 in)
193228.4 mm (1.1 in)
193325.4 mm (1.0 in)
193442.0 mm (1.7 in)
193541.1 mm (1.6 in)
193640.6 mm (1.6 in)
193767.6 mm (2.7 in)
1938121.9 mm (4.8 in)
193953.1 mm (2.1 in)
194063.5 mm (2.5 in)
1941137.1 mm (5.4 in)
194244.2 mm (1.7 in)
194325.9 mm (1.0 in)
194443.2 mm (1.7 in)
194521.8 mm (0.9 in)
194638.2 mm (1.5 in)
194751.3 mm (2.0 in)
194836.9 mm (1.5 in)
194931.0 mm (1.2 in)
195067.6 mm (2.7 in)
195116.0 mm (0.6 in)
195227.8 mm (1.1 in)
195332.1 mm (1.3 in)
195435.0 mm (1.4 in)
1955140.0 mm (5.5 in)
195648.5 mm (1.9 in)
195748.0 mm (1.9 in)
195876.5 mm (3.0 in)
195924.0 mm (0.9 in)
196040.0 mm (1.6 in)
196131.0 mm (1.2 in)
196276.0 mm (3.0 in)
196357.0 mm (2.2 in)
196420.5 mm (0.8 in)
196585.5 mm (3.4 in)
196620.5 mm (0.8 in)
196746.0 mm (1.8 in)
196841.5 mm (1.6 in)
196994.9 mm (3.7 in)
197021.0 mm (0.8 in)
197128.5 mm (1.1 in)
197274.5 mm (2.9 in)
197333.2 mm (1.3 in)
197479.0 mm (3.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Zwartmodder by year The longest dry spell of the year at Zwartmodder, 1920 to 1974. The record is 260 days in 1941, marked on the chart; the median year is 141 days. 0100200300192019301940195019601970Record: 260 days in 1941
The longest dry spell of the year at Zwartmodder, 1920 to 1974. The record is 260 days in 1941, marked on the chart; the median year is 141 days.
Longest dry spell (CDD) at Zwartmodder by year
YearLongest dry spell (CDD)
192015 days
192192 days
1922175 days
1923179 days
192468 days
1925134 days
1926141 days
1927189 days
1928119 days
1929109 days
193082 days
1931191 days
1932137 days
1933138 days
1934169 days
1935193 days
1936164 days
1937169 days
193898 days
193970 days
194093 days
1941260 days
1942166 days
1943115 days
1944213 days
1945120 days
1946107 days
194777 days
1948212 days
1949120 days
195032 days
1951144 days
195257 days
1953120 days
1954151 days
1955158 days
1956184 days
1957110 days
1958156 days
1959151 days
196096 days
1961170 days
1962148 days
1963167 days
1964152 days
196593 days
1966165 days
1967141 days
1968158 days
1969129 days
1970203 days
1971164 days
1972259 days
197382 days
197458 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

52 years, 1921 to 1973

A day with at least 31.9 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 130.7 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Zwartmodder: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years31.9 mm (1.3 in)
5 years51.0 mm (2.0 in)
10 years66.1 mm (2.6 in)
25 years88.7 mm (3.5 in)
50 years108.4 mm (4.3 in)
100 years130.7 mm (5.1 in)Longer than the 52 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, 52 years of values from 1921 to 1973.

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: 140.0 mm (5.5 in) in 1955; 114.3 mm (4.5 in) in 1938; 96.5 mm (3.8 in) in 1941.

Download the Data

  • Data for Zwartmodder standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Zwartmodder 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 . Last revised (2025-12-31).