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

Boa Vista Threshold Days by Year (BR002854001)

4 fixed thresholds counted per year at Boa Vista (BR002854001): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boa Vista Thresholds

  • Boa Vista: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1983 with 73.
  • Boa Vista: days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1990 with 44.
  • Boa Vista: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1997 with 16.
  • Boa Vista: days with 100 mm (3.94 in) or more of precipitation in 19 years, most in 1972 with 3.
  • 4 fixed thresholds have at least one qualifying day at Boa Vista.
27 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Boa Vista Days per year at Boa Vista with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 73 in 1983. 0204060801970: 461971: 471972: 631973: 561974: 361975: 371976: 421977: 501978: 411979: 611980: 501981: 341982: 511983: 731984: 671985: 631986: 531987: 551988: 401989: 511990: 691991: 291992: 651993: 531994: 441995: 131997: 60197019731976197919821985198819911994
Days per year at Boa Vista with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 73 in 1983.
Days with 10 mm (0.39 in) or more of precipitation per year at Boa Vista
YearDaysDecade average
19704647.9
19714747.9
19726347.9
19735647.9
19743647.9
19753747.9
19764247.9
19775047.9
19784147.9
19796147.9
19805053.7
19813453.7
19825153.7
19837353.7
19846753.7
19856353.7
19865353.7
19875553.7
19884053.7
19895153.7
19906947.6
19912947.6
19926547.6
19935347.6
19944447.6
19951347.6
19976047.6
First to last qualifying date each year at Boa Vista For each year, a bar from the first to the last day at Boa Vista meeting 10 mm (0.39 in). 1970: 1 January 1970 to 31 December 19701971: 2 January 1971 to 18 December 19711972: 1 January 1972 to 30 December 19721973: 6 January 1973 to 27 December 19731974: 4 January 1974 to 29 December 19741975: 17 January 1975 to 17 December 19751976: 4 January 1976 to 23 December 19761977: 3 January 1977 to 31 December 19771978: 14 January 1978 to 6 December 19781979: 3 January 1979 to 31 December 19791980: 9 January 1980 to 28 December 19801981: 3 January 1981 to 30 November 19811982: 6 January 1982 to 20 December 19821983: 1 January 1983 to 31 December 19831984: 1 January 1984 to 30 December 19841985: 8 January 1985 to 13 December 19851986: 8 January 1986 to 7 December 19861987: 2 January 1987 to 17 December 19871988: 30 January 1988 to 23 December 19881989: 15 January 1989 to 31 December 19891990: 8 January 1990 to 23 December 19901991: 18 January 1991 to 27 December 19911992: 1 January 1992 to 30 November 19921993: 3 January 1993 to 28 December 19931994: 24 January 1994 to 18 October 19941995: 5 February 1995 to 26 December 19951997: 13 January 1997 to 31 December 19971970197419781982198619901994JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Boa Vista meeting 10 mm (0.39 in).
First to last qualifying date each year at Boa Vista
YearFirst dateLast date
19701970-01-011970-12-31
19711971-01-021971-12-18
19721972-01-011972-12-30
19731973-01-061973-12-27
19741974-01-041974-12-29
19751975-01-171975-12-17
19761976-01-041976-12-23
19771977-01-031977-12-31
19781978-01-141978-12-06
19791979-01-031979-12-31
19801980-01-091980-12-28
19811981-01-031981-11-30
19821982-01-061982-12-20
19831983-01-011983-12-31
19841984-01-011984-12-30
19851985-01-081985-12-13
19861986-01-081986-12-07
19871987-01-021987-12-17
19881988-01-301988-12-23
19891989-01-151989-12-31
19901990-01-081990-12-23
19911991-01-181991-12-27
19921992-01-011992-11-30
19931993-01-031993-12-28
19941994-01-241994-10-18
19951995-02-051995-12-26
19971997-01-131997-12-31

Every Fixed Threshold

Fixed thresholds at Boa Vista
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2773198360
25 mm (0.98 in): Days with 25 mm or more rain2744199038
50 mm (1.97 in): Days with 50 mm or more rain2716199716
100 mm (3.94 in): Days with 100 mm or more rain19319723

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for Boa Vista 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).