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Built 2026-10-17 (17 October 2026)

Haleakala Exp Farm 434 Threshold Days by Year

7 fixed thresholds counted per year at Haleakala Exp Farm 434 (USC00510995): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Haleakala Exp Farm 434 Thresholds

  • Haleakala Exp Farm 434: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1969 with 77.
  • Haleakala Exp Farm 434: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1969 with 41.
  • Haleakala Exp Farm 434: days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1950 with 17.
  • Haleakala Exp Farm 434: days with 100 mm (3.94 in) or more of precipitation in 28 years, most in 1946 with 6.
  • 7 fixed thresholds have at least one qualifying day at Haleakala Exp Farm 434.
41 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Haleakala Exp Farm 434 Days per year at Haleakala Exp Farm 434 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 77 in 1969. 0204060801940: 501941: 651942: 581943: 531944: 351945: 351946: 601947: 541948: 721949: 311950: 681951: 391952: 531953: 191954: 551955: 441956: 451957: 511958: 581959: 561960: 481961: 401963: 421966: 401967: 631968: 541969: 771970: 621971: 371972: 371973: 431974: 431975: 331976: 421977: 421978: 431979: 451980: 681981: 451982: 601984: 29194019451950195519601968197319781984
Days per year at Haleakala Exp Farm 434 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 77 in 1969.
Days with 10 mm (0.39 in) or more of precipitation per year at Haleakala Exp Farm 434
YearDaysDecade average
19405051.3
19416551.3
19425851.3
19435351.3
19443551.3
19453551.3
19466051.3
19475451.3
19487251.3
19493151.3
19506848.8
19513948.8
19525348.8
19531948.8
19545548.8
19554448.8
19564548.8
19575148.8
19585848.8
19595648.8
19604852
19614052
19634252
19664052
19676352
19685452
19697752
19706242.7
19713742.7
19723742.7
19734342.7
19744342.7
19753342.7
19764242.7
19774242.7
19784342.7
19794542.7
19806850.5
19814550.5
19826050.5
19842950.5
First to last qualifying date each year at Haleakala Exp Farm 434 For each year, a bar from the first to the last day at Haleakala Exp Farm 434 meeting 10 mm (0.39 in). 1940: 8 January 1940 to 30 December 19401941: 1 January 1941 to 30 December 19411942: 2 January 1942 to 29 December 19421943: 3 January 1943 to 29 December 19431944: 6 January 1944 to 26 December 19441945: 22 January 1945 to 3 December 19451946: 11 January 1946 to 31 December 19461947: 2 January 1947 to 24 December 19471948: 3 January 1948 to 31 December 19481949: 1 January 1949 to 3 December 19491950: 2 January 1950 to 30 December 19501951: 14 January 1951 to 31 December 19511952: 20 January 1952 to 24 December 19521953: 19 February 1953 to 28 December 19531954: 5 January 1954 to 31 December 19541955: 3 January 1955 to 21 December 19551956: 9 January 1956 to 16 December 19561957: 7 January 1957 to 30 December 19571958: 24 January 1958 to 30 December 19581959: 8 January 1959 to 22 December 19591960: 4 January 1960 to 28 December 19601961: 1 January 1961 to 14 December 19611963: 8 January 1963 to 27 December 19631966: 6 January 1966 to 30 December 19661967: 1 January 1967 to 29 December 19671968: 4 January 1968 to 29 December 19681969: 7 January 1969 to 29 December 19691970: 2 January 1970 to 30 December 19701971: 6 January 1971 to 30 December 19711972: 28 January 1972 to 20 December 19721973: 7 January 1973 to 30 December 19731974: 4 January 1974 to 26 December 19741975: 4 January 1975 to 28 November 19751976: 16 January 1976 to 7 December 19761977: 29 January 1977 to 19 December 19771978: 1 January 1978 to 23 December 19781979: 10 January 1979 to 27 December 19791980: 10 January 1980 to 16 December 19801981: 17 January 1981 to 28 December 19811982: 7 January 1982 to 25 December 19821984: 6 January 1984 to 26 December 19841940194619521958196719731979JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Haleakala Exp Farm 434 meeting 10 mm (0.39 in).
First to last qualifying date each year at Haleakala Exp Farm 434
YearFirst dateLast date
19401940-01-081940-12-30
19411941-01-011941-12-30
19421942-01-021942-12-29
19431943-01-031943-12-29
19441944-01-061944-12-26
19451945-01-221945-12-03
19461946-01-111946-12-31
19471947-01-021947-12-24
19481948-01-031948-12-31
19491949-01-011949-12-03
19501950-01-021950-12-30
19511951-01-141951-12-31
19521952-01-201952-12-24
19531953-02-191953-12-28
19541954-01-051954-12-31
19551955-01-031955-12-21
19561956-01-091956-12-16
19571957-01-071957-12-30
19581958-01-241958-12-30
19591959-01-081959-12-22
19601960-01-041960-12-28
19611961-01-011961-12-14
19631963-01-081963-12-27
19661966-01-061966-12-30
19671967-01-011967-12-29
19681968-01-041968-12-29
19691969-01-071969-12-29
19701970-01-021970-12-30
19711971-01-061971-12-30
19721972-01-281972-12-20
19731973-01-071973-12-30
19741974-01-041974-12-26
19751975-01-041975-11-28
19761976-01-161976-12-07
19771977-01-291977-12-19
19781978-01-011978-12-23
19791979-01-101979-12-27
19801980-01-101980-12-16
19811981-01-171981-12-28
19821982-01-071982-12-25
19841984-01-061984-12-26

Every Fixed Threshold

Fixed thresholds at Haleakala Exp Farm 434
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2219471
20 C (68 F): Tropical nights (min7319471
10 mm (0.39 in): Days with 10 mm or more rain4177196929
25 mm (0.98 in): Days with 25 mm or more rain4141196913
50 mm (1.97 in): Days with 50 mm or more rain401719504
100 mm (3.94 in): Days with 100 mm or more rain28619461
200 mm (7.87 in): Days with 200 mm or more rain6219692

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

  • Data for Haleakala Exp Farm 434 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).