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Built 2026-10-19 (19 October 2026)

Acu Threshold Days by Year (BR038161230)

4 fixed thresholds counted per year at Acu (BR038161230): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Acu Thresholds

  • Acu: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1924 with 48.
  • Acu: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 1924 with 21.
  • Acu: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 1935 with 7.
  • Acu: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1955 with 1.
  • 4 fixed thresholds have at least one qualifying day at Acu.
53 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Acu Days per year at Acu with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1924. 02040601911: 141912: 281913: 241914: 301915: 51916: 131917: 271918: 201919: 41920: 221921: 331922: 271923: 151924: 481925: 201926: 251927: 191928: 131929: 61931: 131932: 91933: 171934: 251935: 371936: 91937: 171938: 111939: 191940: 251941: 71942: 71943: 131944: 121945: 221946: 211947: 221948: 241949: 241950: 121951: 71952: 131953: 91954: 81955: 131956: 161957: 181963: 271964: 451965: 161967: 311968: 221969: 161970: 14191119171923192919361942194819541965
Days per year at Acu with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1924.
Days with 10 mm (0.39 in) or more of precipitation per year at Acu
YearDaysDecade average
19111418.3
19122818.3
19132418.3
19143018.3
1915518.3
19161318.3
19172718.3
19182018.3
1919418.3
19202222.8
19213322.8
19222722.8
19231522.8
19244822.8
19252022.8
19262522.8
19271922.8
19281322.8
1929622.8
19311317.4
1932917.4
19331717.4
19342517.4
19353717.4
1936917.4
19371717.4
19381117.4
19391917.4
19402517.7
1941717.7
1942717.7
19431317.7
19441217.7
19452217.7
19462117.7
19472217.7
19482417.7
19492417.7
19501212
1951712
19521312
1953912
1954812
19551312
19561612
19571812
19632726.2
19644526.2
19651626.2
19673126.2
19682226.2
19691626.2
19701414
First to last qualifying date each year at Acu For each year, a bar from the first to the last day at Acu meeting 10 mm (0.39 in). 1911: 13 January 1911 to 25 December 19111912: 28 January 1912 to 2 June 19121913: 3 February 1913 to 21 June 19131914: 13 January 1914 to 16 August 19141915: 25 January 1915 to 9 May 19151916: 9 February 1916 to 30 December 19161917: 9 February 1917 to 30 May 19171918: 7 January 1918 to 31 December 19181919: 2 January 1919 to 29 December 19191920: 10 March 1920 to 20 June 19201921: 26 January 1921 to 18 July 19211922: 14 January 1922 to 29 November 19221923: 7 February 1923 to 15 June 19231924: 24 January 1924 to 13 June 19241925: 22 January 1925 to 8 May 19251926: 3 January 1926 to 31 May 19261927: 17 February 1927 to 10 July 19271928: 4 January 1928 to 26 June 19281929: 26 January 1929 to 20 February 19291931: 10 January 1931 to 13 June 19311932: 29 January 1932 to 18 June 19321933: 17 January 1933 to 1 July 19331934: 9 February 1934 to 20 December 19341935: 30 January 1935 to 31 December 19351936: 13 February 1936 to 24 June 19361937: 23 February 1937 to 16 June 19371938: 11 February 1938 to 5 June 19381939: 15 February 1939 to 8 November 19391940: 1 February 1940 to 26 July 19401941: 2 March 1941 to 27 April 19411942: 10 March 1942 to 5 September 19421943: 27 January 1943 to 28 April 19431944: 7 March 1944 to 13 May 19441945: 2 January 1945 to 25 June 19451946: 1 January 1946 to 17 December 19461947: 21 January 1947 to 24 June 19471948: 8 February 1948 to 15 November 19481949: 21 February 1949 to 28 November 19491950: 24 February 1950 to 25 April 19501951: 6 February 1951 to 14 December 19511952: 6 January 1952 to 10 May 19521953: 2 January 1953 to 26 November 19531954: 11 February 1954 to 31 May 19541955: 7 February 1955 to 3 June 19551956: 10 February 1956 to 23 August 19561957: 6 March 1957 to 10 December 19571963: 13 January 1963 to 28 December 19631964: 4 January 1964 to 5 August 19641965: 24 January 1965 to 21 June 19651967: 3 February 1967 to 19 June 19671968: 4 March 1968 to 27 December 19681969: 21 January 1969 to 24 June 19691970: 22 January 1970 to 29 April 197019111918192519331940194719541967JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Acu meeting 10 mm (0.39 in).
First to last qualifying date each year at Acu
YearFirst dateLast date
19111911-01-131911-12-25
19121912-01-281912-06-02
19131913-02-031913-06-21
19141914-01-131914-08-16
19151915-01-251915-05-09
19161916-02-091916-12-30
19171917-02-091917-05-30
19181918-01-071918-12-31
19191919-01-021919-12-29
19201920-03-101920-06-20
19211921-01-261921-07-18
19221922-01-141922-11-29
19231923-02-071923-06-15
19241924-01-241924-06-13
19251925-01-221925-05-08
19261926-01-031926-05-31
19271927-02-171927-07-10
19281928-01-041928-06-26
19291929-01-261929-02-20
19311931-01-101931-06-13
19321932-01-291932-06-18
19331933-01-171933-07-01
19341934-02-091934-12-20
19351935-01-301935-12-31
19361936-02-131936-06-24
19371937-02-231937-06-16
19381938-02-111938-06-05
19391939-02-151939-11-08
19401940-02-011940-07-26
19411941-03-021941-04-27
19421942-03-101942-09-05
19431943-01-271943-04-28
19441944-03-071944-05-13
19451945-01-021945-06-25
19461946-01-011946-12-17
19471947-01-211947-06-24
19481948-02-081948-11-15
19491949-02-211949-11-28
19501950-02-241950-04-25
19511951-02-061951-12-14
19521952-01-061952-05-10
19531953-01-021953-11-26
19541954-02-111954-05-31
19551955-02-071955-06-03
19561956-02-101956-08-23
19571957-03-061957-12-10
19631963-01-131963-12-28
19641964-01-041964-08-05
19651965-01-241965-06-21
19671967-02-031967-06-19
19681968-03-041968-12-27
19691969-01-211969-06-24
19701970-01-221970-04-29

Every Fixed Threshold

Fixed thresholds at Acu
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5348192414
25 mm (0.98 in): Days with 25 mm or more rain522119247
50 mm (1.97 in): Days with 50 mm or more rain37719351
100 mm (3.94 in): Days with 100 mm or more rain1119551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

  • Data for Acu 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).