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Built 2026-10-19 (19 October 2026)

Wonderboom Threshold Days by Year (SF002330490)

4 fixed thresholds counted per year at Wonderboom (SF002330490): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wonderboom Thresholds

  • Wonderboom: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1943 with 35.
  • Wonderboom: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1934 with 13.
  • Wonderboom: days with 50 mm (1.97 in) or more of precipitation in 43 years, most in 1948 with 6.
  • Wonderboom: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1956 with 1.
  • 4 fixed thresholds have at least one qualifying day at Wonderboom.
65 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Wonderboom Days per year at Wonderboom with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1943. 0102030401908: 121909: 261911: 291912: 161914: 241915: 251916: 181917: 221918: 241919: 151920: 221921: 181923: 231926: 151927: 221928: 201929: 231931: 201932: 101934: 281935: 251936: 231937: 261938: 281939: 251940: 311941: 231942: 291943: 351944: 91945: 171946: 271947: 191948: 211949: 171950: 291956: 281957: 281958: 261959: 201960: 221961: 291962: 171963: 251964: 241965: 141966: 181967: 281968: 191969: 211970: 241971: 271972: 251973: 171974: 351975: 301977: 171978: 241979: 201980: 131981: 271982: 211983: 201984: 161985: 211908191719271936194319501962196919771984
Days per year at Wonderboom with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1943.
Days with 10 mm (0.39 in) or more of precipitation per year at Wonderboom
YearDaysDecade average
19081219
19092619
19112921.6
19121621.6
19142421.6
19152521.6
19161821.6
19172221.6
19182421.6
19191521.6
19202220.4
19211820.4
19232320.4
19261520.4
19272220.4
19282020.4
19292320.4
19312023.1
19321023.1
19342823.1
19352523.1
19362323.1
19372623.1
19382823.1
19392523.1
19403122.8
19412322.8
19422922.8
19433522.8
1944922.8
19451722.8
19462722.8
19471922.8
19482122.8
19491722.8
19502926.2
19562826.2
19572826.2
19582626.2
19592026.2
19602221.7
19612921.7
19621721.7
19632521.7
19642421.7
19651421.7
19661821.7
19672821.7
19681921.7
19692121.7
19702424.3
19712724.3
19722524.3
19731724.3
19743524.3
19753024.3
19771724.3
19782424.3
19792024.3
19801319.7
19812719.7
19822119.7
19832019.7
19841619.7
19852119.7
First to last qualifying date each year at Wonderboom For each year, a bar from the first to the last day at Wonderboom meeting 10 mm (0.39 in). 1908: 28 January 1908 to 20 December 19081909: 10 January 1909 to 24 December 19091911: 6 January 1911 to 10 December 19111912: 3 January 1912 to 31 December 19121914: 10 January 1914 to 21 December 19141915: 13 January 1915 to 29 December 19151916: 3 January 1916 to 20 December 19161917: 6 January 1917 to 30 December 19171918: 2 January 1918 to 31 December 19181919: 2 January 1919 to 5 December 19191920: 3 January 1920 to 5 December 19201921: 11 February 1921 to 28 December 19211923: 10 January 1923 to 3 December 19231926: 17 January 1926 to 24 December 19261927: 22 January 1927 to 27 December 19271928: 3 January 1928 to 11 December 19281929: 9 January 1929 to 22 December 19291931: 15 January 1931 to 31 December 19311932: 5 January 1932 to 26 December 19321934: 2 January 1934 to 24 December 19341935: 3 January 1935 to 24 December 19351936: 7 February 1936 to 28 December 19361937: 4 January 1937 to 18 December 19371938: 3 January 1938 to 30 November 19381939: 1 January 1939 to 28 November 19391940: 29 January 1940 to 22 December 19401941: 2 January 1941 to 19 October 19411942: 3 January 1942 to 26 December 19421943: 12 January 1943 to 31 December 19431944: 3 January 1944 to 28 November 19441945: 6 January 1945 to 30 December 19451946: 10 January 1946 to 22 December 19461947: 10 January 1947 to 16 December 19471948: 10 January 1948 to 5 December 19481949: 27 January 1949 to 18 December 19491950: 5 January 1950 to 15 December 19501956: 14 January 1956 to 25 December 19561957: 30 January 1957 to 31 December 19571958: 2 January 1958 to 31 December 19581959: 7 January 1959 to 17 December 19591960: 11 January 1960 to 27 December 19601961: 2 January 1961 to 17 December 19611962: 11 January 1962 to 31 December 19621963: 4 January 1963 to 8 December 19631964: 1 January 1964 to 27 December 19641965: 10 January 1965 to 16 December 19651966: 7 January 1966 to 21 December 19661967: 3 January 1967 to 14 November 19671968: 19 January 1968 to 9 December 19681969: 7 January 1969 to 27 December 19691970: 17 January 1970 to 19 December 19701971: 8 January 1971 to 29 December 19711972: 9 January 1972 to 28 December 19721973: 30 January 1973 to 23 December 19731974: 10 January 1974 to 19 December 19741975: 17 January 1975 to 26 December 19751977: 10 January 1977 to 30 December 19771978: 2 January 1978 to 20 December 19781979: 26 January 1979 to 20 December 19791980: 21 January 1980 to 15 December 19801981: 23 January 1981 to 23 December 19811982: 26 January 1982 to 5 December 19821983: 14 January 1983 to 30 December 19831984: 1 January 1984 to 17 December 19841985: 14 January 1985 to 23 December 198519081919193219421956196519741984JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wonderboom meeting 10 mm (0.39 in).
First to last qualifying date each year at Wonderboom
YearFirst dateLast date
19081908-01-281908-12-20
19091909-01-101909-12-24
19111911-01-061911-12-10
19121912-01-031912-12-31
19141914-01-101914-12-21
19151915-01-131915-12-29
19161916-01-031916-12-20
19171917-01-061917-12-30
19181918-01-021918-12-31
19191919-01-021919-12-05
19201920-01-031920-12-05
19211921-02-111921-12-28
19231923-01-101923-12-03
19261926-01-171926-12-24
19271927-01-221927-12-27
19281928-01-031928-12-11
19291929-01-091929-12-22
19311931-01-151931-12-31
19321932-01-051932-12-26
19341934-01-021934-12-24
19351935-01-031935-12-24
19361936-02-071936-12-28
19371937-01-041937-12-18
19381938-01-031938-11-30
19391939-01-011939-11-28
19401940-01-291940-12-22
19411941-01-021941-10-19
19421942-01-031942-12-26
19431943-01-121943-12-31
19441944-01-031944-11-28
19451945-01-061945-12-30
19461946-01-101946-12-22
19471947-01-101947-12-16
19481948-01-101948-12-05
19491949-01-271949-12-18
19501950-01-051950-12-15
19561956-01-141956-12-25
19571957-01-301957-12-31
19581958-01-021958-12-31
19591959-01-071959-12-17
19601960-01-111960-12-27
19611961-01-021961-12-17
19621962-01-111962-12-31
19631963-01-041963-12-08
19641964-01-011964-12-27
19651965-01-101965-12-16
19661966-01-071966-12-21
19671967-01-031967-11-14
19681968-01-191968-12-09
19691969-01-071969-12-27
19701970-01-171970-12-19
19711971-01-081971-12-29
19721972-01-091972-12-28
19731973-01-301973-12-23
19741974-01-101974-12-19
19751975-01-171975-12-26
19771977-01-101977-12-30
19781978-01-021978-12-20
19791979-01-261979-12-20
19801980-01-211980-12-15
19811981-01-231981-12-23
19821982-01-261982-12-05
19831983-01-141983-12-30
19841984-01-011984-12-17
19851985-01-141985-12-23

Every Fixed Threshold

Fixed thresholds at Wonderboom
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain6535194321
25 mm (0.98 in): Days with 25 mm or more rain651319348
50 mm (1.97 in): Days with 50 mm or more rain43619483
100 mm (3.94 in): Days with 100 mm or more rain3119561

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

  • Data for Wonderboom 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).