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

Formosa Threshold Days by Year (BR028810990)

4 fixed thresholds counted per year at Formosa (BR028810990): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Formosa Thresholds

  • Formosa: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1924 with 59.
  • Formosa: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1924 with 22.
  • Formosa: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 1974 with 6.
  • Formosa: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1974 with 2.
  • 4 fixed thresholds have at least one qualifying day at Formosa.
27 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Formosa Days per year at Formosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1924. 02040601921: 371922: 241923: 191924: 591925: 191962: 231963: 361964: 491965: 231966: 161967: 301968: 271969: 221970: 251971: 221972: 121973: 371974: 581975: 261976: 211977: 391978: 221979: 171980: 141981: 101982: 171983: 8192119241963196619691972197519781981
Days per year at Formosa with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1924.
Days with 10 mm (0.39 in) or more of precipitation per year at Formosa
YearDaysDecade average
19213731.6
19222431.6
19231931.6
19245931.6
19251931.6
19622328.3
19633628.3
19644928.3
19652328.3
19661628.3
19673028.3
19682728.3
19692228.3
19702527.9
19712227.9
19721227.9
19733727.9
19745827.9
19752627.9
19762127.9
19773927.9
19782227.9
19791727.9
19801412.3
19811012.3
19821712.3
1983812.3
First to last qualifying date each year at Formosa For each year, a bar from the first to the last day at Formosa meeting 10 mm (0.39 in). 1921: 5 February 1921 to 18 July 19211922: 26 February 1922 to 22 August 19221923: 5 February 1923 to 10 July 19231924: 25 January 1924 to 28 December 19241925: 16 January 1925 to 21 September 19251962: 23 January 1962 to 6 May 19621963: 13 January 1963 to 28 December 19631964: 5 January 1964 to 7 July 19641965: 9 January 1965 to 26 May 19651966: 7 February 1966 to 31 May 19661967: 3 February 1967 to 26 June 19671968: 27 February 1968 to 28 December 19681969: 8 February 1969 to 7 July 19691970: 19 January 1970 to 31 May 19701971: 22 January 1971 to 16 July 19711972: 13 February 1972 to 22 December 19721973: 28 January 1973 to 26 June 19731974: 14 January 1974 to 22 December 19741975: 8 January 1975 to 7 December 19751976: 12 February 1976 to 6 July 19761977: 22 January 1977 to 5 July 19771978: 10 February 1978 to 20 October 19781979: 20 January 1979 to 6 September 19791980: 11 January 1980 to 1 May 19801981: 14 March 1981 to 23 December 19811982: 2 February 1982 to 17 December 19821983: 13 February 1983 to 27 December 19831921192519651969197319771981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Formosa meeting 10 mm (0.39 in).
First to last qualifying date each year at Formosa
YearFirst dateLast date
19211921-02-051921-07-18
19221922-02-261922-08-22
19231923-02-051923-07-10
19241924-01-251924-12-28
19251925-01-161925-09-21
19621962-01-231962-05-06
19631963-01-131963-12-28
19641964-01-051964-07-07
19651965-01-091965-05-26
19661966-02-071966-05-31
19671967-02-031967-06-26
19681968-02-271968-12-28
19691969-02-081969-07-07
19701970-01-191970-05-31
19711971-01-221971-07-16
19721972-02-131972-12-22
19731973-01-281973-06-26
19741974-01-141974-12-22
19751975-01-081975-12-07
19761976-02-121976-07-06
19771977-01-221977-07-05
19781978-02-101978-10-20
19791979-01-201979-09-06
19801980-01-111980-05-01
19811981-03-141981-12-23
19821982-02-021982-12-17
19831983-02-131983-12-27

Every Fixed Threshold

Fixed thresholds at Formosa
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain275919248
25 mm (0.98 in): Days with 25 mm or more rain262219243
50 mm (1.97 in): Days with 50 mm or more rain22619741
100 mm (3.94 in): Days with 100 mm or more rain3219741

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.

Download the Data

  • Data for Formosa 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).