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Built 2026-10-19 (19 October 2026)

Standard Threshold Days by Year (USC00228352)

4 fixed thresholds counted per year at Standard (USC00228352): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Standard Thresholds

  • Standard: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1975 with 67.
  • Standard: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1946 with 33.
  • Standard: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1979 with 15.
  • Standard: days with 100 mm (3.94 in) or more of precipitation in 27 years, most in 1961 with 3.
  • 4 fixed thresholds have at least one qualifying day at Standard.
45 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Standard Days per year at Standard with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 67 in 1975. 0204060801941: 421942: 561943: 441944: 511946: 551948: 631949: 531950: 371951: 391952: 411953: 481954: 341955: 361956: 481957: 441958: 581959: 601960: 461961: 611962: 391963: 461964: 461965: 491966: 521967: 431968: 331969: 431970: 441971: 321972: 461973: 581974: 571975: 671976: 351977: 571978: 461979: 531980: 521981: 301982: 531983: 541984: 411985: 481986: 451987: 53194119481953195819631968197319781983
Days per year at Standard with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 67 in 1975.
Days with 10 mm (0.39 in) or more of precipitation per year at Standard
YearDaysDecade average
19414252
19425652
19434452
19445152
19465552
19486352
19495352
19503744.5
19513944.5
19524144.5
19534844.5
19543444.5
19553644.5
19564844.5
19574444.5
19585844.5
19596044.5
19604645.8
19616145.8
19623945.8
19634645.8
19644645.8
19654945.8
19665245.8
19674345.8
19683345.8
19694345.8
19704449.5
19713249.5
19724649.5
19735849.5
19745749.5
19756749.5
19763549.5
19775749.5
19784649.5
19795349.5
19805247
19813047
19825347
19835447
19844147
19854847
19864547
19875347
First to last qualifying date each year at Standard For each year, a bar from the first to the last day at Standard meeting 10 mm (0.39 in). 1941: 3 January 1941 to 26 December 19411942: 1 January 1942 to 28 December 19421943: 8 January 1943 to 8 November 19431944: 3 January 1944 to 7 December 19441946: 6 January 1946 to 31 December 19461948: 13 January 1948 to 29 December 19481949: 6 January 1949 to 18 December 19491950: 7 January 1950 to 28 December 19501951: 6 January 1951 to 20 December 19511952: 28 January 1952 to 31 December 19521953: 18 January 1953 to 29 December 19531954: 5 January 1954 to 29 December 19541955: 1 January 1955 to 19 December 19551956: 19 January 1956 to 24 December 19561957: 23 January 1957 to 28 December 19571958: 7 January 1958 to 24 December 19581959: 16 January 1959 to 28 December 19591960: 1 January 1960 to 21 December 19601961: 1 January 1961 to 27 December 19611962: 1 January 1962 to 29 December 19621963: 12 January 1963 to 23 December 19631964: 5 January 1964 to 11 December 19641965: 23 January 1965 to 19 December 19651966: 3 January 1966 to 31 December 19661967: 1 January 1967 to 31 December 19671968: 10 January 1968 to 31 December 19681969: 18 January 1969 to 31 December 19691970: 6 January 1970 to 30 December 19701971: 5 January 1971 to 21 December 19711972: 2 January 1972 to 31 December 19721973: 18 January 1973 to 26 December 19731974: 1 January 1974 to 24 December 19741975: 8 January 1975 to 31 December 19751976: 1 February 1976 to 26 December 19761977: 3 January 1977 to 30 December 19771978: 8 January 1978 to 24 December 19781979: 1 January 1979 to 23 December 19791980: 9 January 1980 to 10 December 19801981: 7 January 1981 to 31 December 19811982: 8 January 1982 to 29 December 19821983: 1 January 1983 to 29 December 19831984: 10 January 1984 to 30 December 19841985: 17 January 1985 to 28 December 19851986: 7 January 1986 to 23 December 19861987: 4 January 1987 to 26 December 198719411949195519611967197319791985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Standard meeting 10 mm (0.39 in).
First to last qualifying date each year at Standard
YearFirst dateLast date
19411941-01-031941-12-26
19421942-01-011942-12-28
19431943-01-081943-11-08
19441944-01-031944-12-07
19461946-01-061946-12-31
19481948-01-131948-12-29
19491949-01-061949-12-18
19501950-01-071950-12-28
19511951-01-061951-12-20
19521952-01-281952-12-31
19531953-01-181953-12-29
19541954-01-051954-12-29
19551955-01-011955-12-19
19561956-01-191956-12-24
19571957-01-231957-12-28
19581958-01-071958-12-24
19591959-01-161959-12-28
19601960-01-011960-12-21
19611961-01-011961-12-27
19621962-01-011962-12-29
19631963-01-121963-12-23
19641964-01-051964-12-11
19651965-01-231965-12-19
19661966-01-031966-12-31
19671967-01-011967-12-31
19681968-01-101968-12-31
19691969-01-181969-12-31
19701970-01-061970-12-30
19711971-01-051971-12-21
19721972-01-021972-12-31
19731973-01-181973-12-26
19741974-01-011974-12-24
19751975-01-081975-12-31
19761976-02-011976-12-26
19771977-01-031977-12-30
19781978-01-081978-12-24
19791979-01-011979-12-23
19801980-01-091980-12-10
19811981-01-071981-12-31
19821982-01-081982-12-29
19831983-01-011983-12-29
19841984-01-101984-12-30
19851985-01-171985-12-28
19861986-01-071986-12-23
19871987-01-041987-12-26

Every Fixed Threshold

Fixed thresholds at Standard
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4567197553
25 mm (0.98 in): Days with 25 mm or more rain4533194622
50 mm (1.97 in): Days with 50 mm or more rain451519798
100 mm (3.94 in): Days with 100 mm or more rain27319611

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Standard 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).