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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 (BR027899990)

4 fixed thresholds counted per year at Boa Vista (BR027899990): 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 15 years, most in 1947 with 47.
  • Boa Vista: days with 25 mm (0.98 in) or more of precipitation in 14 years, most in 1947 with 9.
  • Boa Vista: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 1945 with 3.
  • Boa Vista: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1952 with 1.
  • 4 fixed thresholds have at least one qualifying day at Boa Vista.
15 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 47 in 1947. 02040601944: 131945: 371946: 221947: 471948: 291949: 291950: 351951: 51952: 211953: 171954: 141955: 211956: 151957: 111958: 119441946194819501952195419561958
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 47 in 1947.
Days with 10 mm (0.39 in) or more of precipitation per year at Boa Vista
YearDaysDecade average
19441329.5
19453729.5
19462229.5
19474729.5
19482929.5
19492929.5
19503515.6
1951515.6
19522115.6
19531715.6
19541415.6
19552115.6
19561515.6
19571115.6
1958115.6
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). 1944: 22 January 1944 to 16 December 19441945: 3 January 1945 to 12 December 19451946: 1 January 1946 to 18 December 19461947: 20 January 1947 to 25 November 19471948: 27 January 1948 to 12 June 19481949: 7 February 1949 to 25 November 19491950: 13 January 1950 to 28 May 19501951: 5 April 1951 to 23 December 19511952: 30 January 1952 to 16 December 19521953: 8 February 1953 to 20 May 19531954: 10 February 1954 to 13 May 19541955: 20 January 1955 to 24 May 19551956: 19 February 1956 to 21 April 19561957: 1 March 1957 to 20 April 19571958: 2 February 1958 to 2 February 195819441946194819501952195419561958JanFebMarAprMayJunJulAugSepOctNovDec
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
19441944-01-221944-12-16
19451945-01-031945-12-12
19461946-01-011946-12-18
19471947-01-201947-11-25
19481948-01-271948-06-12
19491949-02-071949-11-25
19501950-01-131950-05-28
19511951-04-051951-12-23
19521952-01-301952-12-16
19531953-02-081953-05-20
19541954-02-101954-05-13
19551955-01-201955-05-24
19561956-02-191956-04-21
19571957-03-011957-04-20
19581958-02-021958-02-02

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 rain154719471
25 mm (0.98 in): Days with 25 mm or more rain14919474
50 mm (1.97 in): Days with 50 mm or more rain9319453
100 mm (3.94 in): Days with 100 mm or more rain1119521

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

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).