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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

De Kalk Threshold Days by Year (SF002588120)

4 fixed thresholds counted per year at De Kalk (SF002588120): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for De Kalk Thresholds

  • De Kalk: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1974 with 21.
  • De Kalk: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1948 with 6.
  • De Kalk: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1935 with 2.
  • De Kalk: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1948 with 1.
  • 4 fixed thresholds have at least one qualifying day at De Kalk.
62 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at De Kalk Days per year at De Kalk with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1974. 01020301920: 161922: 61923: 101927: 81929: 161931: 51932: 41933: 81934: 161935: 141936: 121937: 71938: 61939: 111940: 111941: 131942: 171943: 201944: 71945: 41946: 141947: 111948: 131949: 41950: 131951: 111952: 121953: 111954: 101955: 191956: 131957: 191958: 81959: 181960: 111961: 141962: 151963: 191964: 111965: 111966: 111967: 151968: 111969: 101970: 151971: 151972: 131973: 101974: 211975: 151976: 201977: 111978: 81979: 131980: 61981: 161982: 81983: 51984: 81985: 41986: 101987: 14192019331940194719541961196819751982
Days per year at De Kalk with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at De Kalk
YearDaysDecade average
19201611.2
1922611.2
19231011.2
1927811.2
19291611.2
193159.2
193249.2
193389.2
1934169.2
1935149.2
1936129.2
193779.2
193869.2
1939119.2
19401111.4
19411311.4
19421711.4
19432011.4
1944711.4
1945411.4
19461411.4
19471111.4
19481311.4
1949411.4
19501313.4
19511113.4
19521213.4
19531113.4
19541013.4
19551913.4
19561313.4
19571913.4
1958813.4
19591813.4
19601112.8
19611412.8
19621512.8
19631912.8
19641112.8
19651112.8
19661112.8
19671512.8
19681112.8
19691012.8
19701514.1
19711514.1
19721314.1
19731014.1
19742114.1
19751514.1
19762014.1
19771114.1
1978814.1
19791314.1
198068.9
1981168.9
198288.9
198358.9
198488.9
198548.9
1986108.9
1987148.9
First to last qualifying date each year at De Kalk For each year, a bar from the first to the last day at De Kalk meeting 10 mm (0.39 in). 1920: 29 January 1920 to 15 December 19201922: 9 January 1922 to 21 November 19221923: 25 January 1923 to 13 November 19231927: 15 March 1927 to 25 December 19271929: 19 January 1929 to 20 December 19291931: 28 March 1931 to 7 November 19311932: 27 February 1932 to 14 September 19321933: 30 January 1933 to 14 December 19331934: 3 January 1934 to 20 December 19341935: 5 February 1935 to 21 December 19351936: 28 January 1936 to 27 December 19361937: 19 January 1937 to 14 December 19371938: 28 January 1938 to 28 December 19381939: 22 January 1939 to 11 November 19391940: 29 January 1940 to 23 December 19401941: 20 January 1941 to 29 October 19411942: 2 January 1942 to 26 December 19421943: 4 February 1943 to 31 December 19431944: 31 January 1944 to 17 November 19441945: 31 January 1945 to 9 November 19451946: 8 January 1946 to 17 December 19461947: 13 January 1947 to 24 December 19471948: 1 January 1948 to 11 October 19481949: 24 February 1949 to 10 December 19491950: 7 February 1950 to 28 December 19501951: 1 January 1951 to 9 May 19511952: 14 January 1952 to 16 December 19521953: 12 March 1953 to 13 December 19531954: 9 January 1954 to 5 November 19541955: 21 January 1955 to 17 December 19551956: 20 February 1956 to 8 December 19561957: 7 January 1957 to 30 December 19571958: 7 January 1958 to 26 December 19581959: 7 January 1959 to 16 December 19591960: 6 February 1960 to 29 December 19601961: 2 January 1961 to 27 November 19611962: 2 February 1962 to 31 December 19621963: 6 January 1963 to 18 November 19631964: 11 February 1964 to 12 December 19641965: 14 January 1965 to 16 December 19651966: 18 January 1966 to 18 December 19661967: 12 January 1967 to 29 December 19671968: 8 January 1968 to 1 December 19681969: 26 February 1969 to 6 December 19691970: 18 January 1970 to 20 December 19701971: 5 January 1971 to 1 December 19711972: 8 January 1972 to 5 November 19721973: 1 February 1973 to 23 December 19731974: 17 January 1974 to 18 November 19741975: 23 January 1975 to 15 December 19751976: 4 January 1976 to 14 December 19761977: 29 January 1977 to 30 November 19771978: 21 January 1978 to 9 December 19781979: 31 January 1979 to 22 December 19791980: 27 February 1980 to 1 December 19801981: 2 January 1981 to 22 December 19811982: 20 February 1982 to 31 October 19821983: 25 March 1983 to 28 November 19831984: 26 February 1984 to 28 November 19841985: 21 February 1985 to 31 October 19851986: 21 January 1986 to 7 November 19861987: 16 March 1987 to 22 December 198719201934194219501958196619741982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at De Kalk meeting 10 mm (0.39 in).
First to last qualifying date each year at De Kalk
YearFirst dateLast date
19201920-01-291920-12-15
19221922-01-091922-11-21
19231923-01-251923-11-13
19271927-03-151927-12-25
19291929-01-191929-12-20
19311931-03-281931-11-07
19321932-02-271932-09-14
19331933-01-301933-12-14
19341934-01-031934-12-20
19351935-02-051935-12-21
19361936-01-281936-12-27
19371937-01-191937-12-14
19381938-01-281938-12-28
19391939-01-221939-11-11
19401940-01-291940-12-23
19411941-01-201941-10-29
19421942-01-021942-12-26
19431943-02-041943-12-31
19441944-01-311944-11-17
19451945-01-311945-11-09
19461946-01-081946-12-17
19471947-01-131947-12-24
19481948-01-011948-10-11
19491949-02-241949-12-10
19501950-02-071950-12-28
19511951-01-011951-05-09
19521952-01-141952-12-16
19531953-03-121953-12-13
19541954-01-091954-11-05
19551955-01-211955-12-17
19561956-02-201956-12-08
19571957-01-071957-12-30
19581958-01-071958-12-26
19591959-01-071959-12-16
19601960-02-061960-12-29
19611961-01-021961-11-27
19621962-02-021962-12-31
19631963-01-061963-11-18
19641964-02-111964-12-12
19651965-01-141965-12-16
19661966-01-181966-12-18
19671967-01-121967-12-29
19681968-01-081968-12-01
19691969-02-261969-12-06
19701970-01-181970-12-20
19711971-01-051971-12-01
19721972-01-081972-11-05
19731973-02-011973-12-23
19741974-01-171974-11-18
19751975-01-231975-12-15
19761976-01-041976-12-14
19771977-01-291977-11-30
19781978-01-211978-12-09
19791979-01-311979-12-22
19801980-02-271980-12-01
19811981-01-021981-12-22
19821982-02-201982-10-31
19831983-03-251983-11-28
19841984-02-261984-11-28
19851985-02-211985-10-31
19861986-01-211986-11-07
19871987-03-161987-12-22

Every Fixed Threshold

Fixed thresholds at De Kalk
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain6221197414
25 mm (0.98 in): Days with 25 mm or more rain56619482
50 mm (1.97 in): Days with 50 mm or more rain16219352
100 mm (3.94 in): Days with 100 mm or more rain1119481

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

  • Data for De Kalk 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).