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Built 2026-10-19 (19 October 2026)

Sao Tome Threshold Days by Year (BR038179880)

4 fixed thresholds counted per year at Sao Tome (BR038179880): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sao Tome Thresholds

  • Sao Tome: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1974 with 45.
  • Sao Tome: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1974 with 16.
  • Sao Tome: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 1974 with 6.
  • Sao Tome: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1934 with 1.
  • 4 fixed thresholds have at least one qualifying day at Sao Tome.
39 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Sao Tome Days per year at Sao Tome with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1974. 02040601934: 151935: 201936: 91937: 141939: 141940: 271941: 131943: 111944: 81945: 191946: 101947: 201948: 171949: 131950: 151951: 91952: 71953: 71954: 111955: 131956: 121957: 111958: 51959: 121960: 71961: 51963: 71964: 181965: 111966: 41967: 201968: 141969: 141971: 91974: 451975: 181976: 121978: 151982: 41934193919441948195219561960196519691976
Days per year at Sao Tome with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Sao Tome
YearDaysDecade average
19341514.4
19352014.4
1936914.4
19371414.4
19391414.4
19402715.3
19411315.3
19431115.3
1944815.3
19451915.3
19461015.3
19472015.3
19481715.3
19491315.3
19501510.2
1951910.2
1952710.2
1953710.2
19541110.2
19551310.2
19561210.2
19571110.2
1958510.2
19591210.2
1960711.1
1961511.1
1963711.1
19641811.1
19651111.1
1966411.1
19672011.1
19681411.1
19691411.1
1971919.8
19744519.8
19751819.8
19761219.8
19781519.8
198244
First to last qualifying date each year at Sao Tome For each year, a bar from the first to the last day at Sao Tome meeting 10 mm (0.39 in). 1934: 1 January 1934 to 16 December 19341935: 28 January 1935 to 28 July 19351936: 10 February 1936 to 25 June 19361937: 7 February 1937 to 11 August 19371939: 2 February 1939 to 19 December 19391940: 5 January 1940 to 12 June 19401941: 13 February 1941 to 12 December 19411943: 25 January 1943 to 4 July 19431944: 8 March 1944 to 18 July 19441945: 2 January 1945 to 1 July 19451946: 2 January 1946 to 21 December 19461947: 22 January 1947 to 24 October 19471948: 9 February 1948 to 15 November 19481949: 9 January 1949 to 27 November 19491950: 18 January 1950 to 21 July 19501951: 3 February 1951 to 23 November 19511952: 15 January 1952 to 26 June 19521953: 18 April 1953 to 1 July 19531954: 13 February 1954 to 17 August 19541955: 7 February 1955 to 4 July 19551956: 11 February 1956 to 15 July 19561957: 11 January 1957 to 10 July 19571958: 11 May 1958 to 12 July 19581959: 20 January 1959 to 6 August 19591960: 17 April 1960 to 28 June 19601961: 19 January 1961 to 29 June 19611963: 21 January 1963 to 17 December 19631964: 29 February 1964 to 3 August 19641965: 11 January 1965 to 15 September 19651966: 9 February 1966 to 20 November 19661967: 12 February 1967 to 30 December 19671968: 16 January 1968 to 6 July 19681969: 23 February 1969 to 4 August 19691971: 21 January 1971 to 27 September 19711974: 16 January 1974 to 9 July 19741975: 15 January 1975 to 4 December 19751976: 9 February 1976 to 14 October 19761978: 6 March 1978 to 27 July 19781982: 10 April 1982 to 27 May 198219341940194619511956196119671975JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Sao Tome meeting 10 mm (0.39 in).
First to last qualifying date each year at Sao Tome
YearFirst dateLast date
19341934-01-011934-12-16
19351935-01-281935-07-28
19361936-02-101936-06-25
19371937-02-071937-08-11
19391939-02-021939-12-19
19401940-01-051940-06-12
19411941-02-131941-12-12
19431943-01-251943-07-04
19441944-03-081944-07-18
19451945-01-021945-07-01
19461946-01-021946-12-21
19471947-01-221947-10-24
19481948-02-091948-11-15
19491949-01-091949-11-27
19501950-01-181950-07-21
19511951-02-031951-11-23
19521952-01-151952-06-26
19531953-04-181953-07-01
19541954-02-131954-08-17
19551955-02-071955-07-04
19561956-02-111956-07-15
19571957-01-111957-07-10
19581958-05-111958-07-12
19591959-01-201959-08-06
19601960-04-171960-06-28
19611961-01-191961-06-29
19631963-01-211963-12-17
19641964-02-291964-08-03
19651965-01-111965-09-15
19661966-02-091966-11-20
19671967-02-121967-12-30
19681968-01-161968-07-06
19691969-02-231969-08-04
19711971-01-211971-09-27
19741974-01-161974-07-09
19751975-01-151975-12-04
19761976-02-091976-10-14
19781978-03-061978-07-27
19821982-04-101982-05-27

Every Fixed Threshold

Fixed thresholds at Sao Tome
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain394519744
25 mm (0.98 in): Days with 25 mm or more rain361619744
50 mm (1.97 in): Days with 50 mm or more rain24619741
100 mm (3.94 in): Days with 100 mm or more rain6119341

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.

Download the Data

  • Data for Sao Tome 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).