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Built 2026-10-19 (19 October 2026)

Groenkloof Threshold Days by Year (SF000966800)

4 fixed thresholds counted per year at Groenkloof (SF000966800): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Groenkloof Thresholds

  • Groenkloof: days with 10 mm (0.39 in) or more of precipitation in 73 years, most in 1963 with 23.
  • Groenkloof: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1974 with 9.
  • Groenkloof: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1906 with 4.
  • Groenkloof: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1944 with 1.
  • 4 fixed thresholds have at least one qualifying day at Groenkloof.
73 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Groenkloof Days per year at Groenkloof with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1963. 01020301906: 141907: 61927: 111928: 111929: 161930: 121931: 131932: 151933: 121934: 181935: 151936: 181937: 131938: 131939: 201940: 181941: 101942: 111943: 151944: 121945: 101946: 81947: 161948: 131949: 51950: 201951: 91952: 131953: 181954: 161955: 141956: 201957: 91958: 121959: 131960: 131961: 121962: 101963: 231964: 101965: 171966: 81967: 131968: 101969: 121970: 101971: 231972: 91973: 121974: 231975: 221976: 221977: 181978: 101979: 151980: 131981: 201982: 171983: 131984: 31985: 161986: 161987: 111988: 201989: 181990: 81991: 131992: 81993: 141994: 131995: 161996: 151997: 171906193319411949195719651973198119891997
Days per year at Groenkloof with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1963.
Days with 10 mm (0.39 in) or more of precipitation per year at Groenkloof
YearDaysDecade average
19061410
1907610
19271112.7
19281112.7
19291612.7
19301214.9
19311314.9
19321514.9
19331214.9
19341814.9
19351514.9
19361814.9
19371314.9
19381314.9
19392014.9
19401811.8
19411011.8
19421111.8
19431511.8
19441211.8
19451011.8
1946811.8
19471611.8
19481311.8
1949511.8
19502014.4
1951914.4
19521314.4
19531814.4
19541614.4
19551414.4
19562014.4
1957914.4
19581214.4
19591314.4
19601312.8
19611212.8
19621012.8
19632312.8
19641012.8
19651712.8
1966812.8
19671312.8
19681012.8
19691212.8
19701016.4
19712316.4
1972916.4
19731216.4
19742316.4
19752216.4
19762216.4
19771816.4
19781016.4
19791516.4
19801314.7
19812014.7
19821714.7
19831314.7
1984314.7
19851614.7
19861614.7
19871114.7
19882014.7
19891814.7
1990813
19911313
1992813
19931413
19941313
19951613
19961513
19971713
First to last qualifying date each year at Groenkloof For each year, a bar from the first to the last day at Groenkloof meeting 10 mm (0.39 in). 1906: 8 February 1906 to 27 December 19061907: 28 January 1907 to 16 September 19071927: 2 February 1927 to 28 December 19271928: 24 February 1928 to 22 December 19281929: 18 January 1929 to 10 December 19291930: 3 January 1930 to 11 November 19301931: 14 January 1931 to 31 December 19311932: 1 January 1932 to 25 November 19321933: 22 February 1933 to 27 November 19331934: 2 January 1934 to 24 December 19341935: 4 February 1935 to 31 December 19351936: 12 February 1936 to 4 December 19361937: 19 January 1937 to 18 December 19371938: 21 January 1938 to 16 December 19381939: 31 January 1939 to 3 December 19391940: 16 January 1940 to 10 November 19401941: 6 January 1941 to 30 October 19411942: 5 February 1942 to 11 November 19421943: 12 January 1943 to 31 December 19431944: 14 January 1944 to 19 October 19441945: 15 January 1945 to 28 July 19451946: 25 January 1946 to 26 November 19461947: 6 January 1947 to 23 December 19471948: 28 January 1948 to 20 December 19481949: 27 February 1949 to 11 December 19491950: 8 February 1950 to 7 December 19501951: 11 January 1951 to 23 October 19511952: 31 January 1952 to 15 December 19521953: 20 February 1953 to 28 December 19531954: 20 February 1954 to 20 November 19541955: 12 February 1955 to 30 November 19551956: 18 January 1956 to 20 December 19561957: 19 February 1957 to 30 December 19571958: 13 January 1958 to 19 December 19581959: 25 January 1959 to 4 December 19591960: 17 January 1960 to 23 December 19601961: 27 January 1961 to 28 August 19611962: 16 January 1962 to 8 October 19621963: 4 January 1963 to 12 December 19631964: 3 February 1964 to 17 December 19641965: 29 January 1965 to 22 November 19651966: 21 January 1966 to 6 November 19661967: 31 January 1967 to 23 November 19671968: 28 March 1968 to 7 December 19681969: 24 February 1969 to 7 November 19691970: 27 February 1970 to 6 December 19701971: 9 January 1971 to 18 December 19711972: 10 January 1972 to 15 December 19721973: 3 February 1973 to 28 December 19731974: 20 January 1974 to 17 December 19741975: 11 February 1975 to 22 December 19751976: 19 January 1976 to 31 December 19761977: 8 January 1977 to 30 December 19771978: 7 January 1978 to 12 December 19781979: 1 January 1979 to 19 November 19791980: 5 February 1980 to 26 December 19801981: 24 January 1981 to 22 December 19811982: 2 March 1982 to 1 December 19821983: 31 January 1983 to 31 December 19831984: 3 April 1984 to 27 November 19841985: 13 January 1985 to 23 December 19851986: 17 January 1986 to 26 November 19861987: 9 February 1987 to 22 December 19871988: 14 January 1988 to 23 December 19881989: 3 January 1989 to 13 December 19891990: 17 January 1990 to 17 October 19901991: 6 January 1991 to 30 December 19911992: 10 February 1992 to 15 October 19921993: 9 January 1993 to 23 December 19931994: 6 January 1994 to 25 December 19941995: 10 January 1995 to 14 December 19951996: 21 January 1996 to 5 December 19961997: 5 January 1997 to 27 November 199719061935194519551965197519851995JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Groenkloof meeting 10 mm (0.39 in).
First to last qualifying date each year at Groenkloof
YearFirst dateLast date
19061906-02-081906-12-27
19071907-01-281907-09-16
19271927-02-021927-12-28
19281928-02-241928-12-22
19291929-01-181929-12-10
19301930-01-031930-11-11
19311931-01-141931-12-31
19321932-01-011932-11-25
19331933-02-221933-11-27
19341934-01-021934-12-24
19351935-02-041935-12-31
19361936-02-121936-12-04
19371937-01-191937-12-18
19381938-01-211938-12-16
19391939-01-311939-12-03
19401940-01-161940-11-10
19411941-01-061941-10-30
19421942-02-051942-11-11
19431943-01-121943-12-31
19441944-01-141944-10-19
19451945-01-151945-07-28
19461946-01-251946-11-26
19471947-01-061947-12-23
19481948-01-281948-12-20
19491949-02-271949-12-11
19501950-02-081950-12-07
19511951-01-111951-10-23
19521952-01-311952-12-15
19531953-02-201953-12-28
19541954-02-201954-11-20
19551955-02-121955-11-30
19561956-01-181956-12-20
19571957-02-191957-12-30
19581958-01-131958-12-19
19591959-01-251959-12-04
19601960-01-171960-12-23
19611961-01-271961-08-28
19621962-01-161962-10-08
19631963-01-041963-12-12
19641964-02-031964-12-17
19651965-01-291965-11-22
19661966-01-211966-11-06
19671967-01-311967-11-23
19681968-03-281968-12-07
19691969-02-241969-11-07
19701970-02-271970-12-06
19711971-01-091971-12-18
19721972-01-101972-12-15
19731973-02-031973-12-28
19741974-01-201974-12-17
19751975-02-111975-12-22
19761976-01-191976-12-31
19771977-01-081977-12-30
19781978-01-071978-12-12
19791979-01-011979-11-19
19801980-02-051980-12-26
19811981-01-241981-12-22
19821982-03-021982-12-01
19831983-01-311983-12-31
19841984-04-031984-11-27
19851985-01-131985-12-23
19861986-01-171986-11-26
19871987-02-091987-12-22
19881988-01-141988-12-23
19891989-01-031989-12-13
19901990-01-171990-10-17
19911991-01-061991-12-30
19921992-02-101992-10-15
19931993-01-091993-12-23
19941994-01-061994-12-25
19951995-01-101995-12-14
19961996-01-211996-12-05
19971997-01-051997-11-27

Every Fixed Threshold

Fixed thresholds at Groenkloof
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain7323196317
25 mm (0.98 in): Days with 25 mm or more rain68919744
50 mm (1.97 in): Days with 50 mm or more rain32419063
100 mm (3.94 in): Days with 100 mm or more rain2119441

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

  • Data for Groenkloof 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). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).