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Built 2026-10-19 (19 October 2026)

New Orleans Jefferson Threshold Days by Year (USC00166671)

5 fixed thresholds counted per year at New Orleans Jefferson (USC00166671): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for New Orleans Jefferson Thresholds

  • New Orleans Jefferson: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1961 with 63.
  • New Orleans Jefferson: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1975 with 32.
  • New Orleans Jefferson: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1973 with 11.
  • New Orleans Jefferson: days with 100 mm (3.94 in) or more of precipitation in 16 years, most in 1948 with 3.
  • 5 fixed thresholds have at least one qualifying day at New Orleans Jefferson.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at New Orleans Jefferson Days per year at New Orleans Jefferson with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 63 in 1961. 0204060801948: 461949: 531950: 391951: 431952: 371953: 441954: 331955: 471956: 471957: 441958: 501959: 501960: 401961: 631962: 401963: 471964: 481965: 351966: 511967: 431968: 371969: 481970: 421971: 451972: 471973: 521974: 391975: 581976: 371977: 551948195119541957196019631966196919721975
Days per year at New Orleans Jefferson with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 63 in 1961.
Days with 10 mm (0.39 in) or more of precipitation per year at New Orleans Jefferson
YearDaysDecade average
19484649.5
19495349.5
19503943.4
19514343.4
19523743.4
19534443.4
19543343.4
19554743.4
19564743.4
19574443.4
19585043.4
19595043.4
19604045.2
19616345.2
19624045.2
19634745.2
19644845.2
19653545.2
19665145.2
19674345.2
19683745.2
19694845.2
19704246.9
19714546.9
19724746.9
19735246.9
19743946.9
19755846.9
19763746.9
19775546.9
First to last qualifying date each year at New Orleans Jefferson For each year, a bar from the first to the last day at New Orleans Jefferson meeting 10 mm (0.39 in). 1948: 17 January 1948 to 29 December 19481949: 30 January 1949 to 17 December 19491950: 6 January 1950 to 28 December 19501951: 3 January 1951 to 19 December 19511952: 27 January 1952 to 30 December 19521953: 17 January 1953 to 30 December 19531954: 4 January 1954 to 31 December 19541955: 15 January 1955 to 6 December 19551956: 18 January 1956 to 23 December 19561957: 25 January 1957 to 28 December 19571958: 6 January 1958 to 23 December 19581959: 15 January 1959 to 31 December 19591960: 6 January 1960 to 31 December 19601961: 7 January 1961 to 17 December 19611962: 5 January 1962 to 29 December 19621963: 17 January 1963 to 31 December 19631964: 4 January 1964 to 24 December 19641965: 2 January 1965 to 19 December 19651966: 3 January 1966 to 31 December 19661967: 1 January 1967 to 31 December 19671968: 15 February 1968 to 31 December 19681969: 16 January 1969 to 25 December 19691970: 5 January 1970 to 30 December 19701971: 4 January 1971 to 20 December 19711972: 2 January 1972 to 30 December 19721973: 8 February 1973 to 31 December 19731974: 3 January 1974 to 20 December 19741975: 3 January 1975 to 30 December 19751976: 31 January 1976 to 25 December 19761977: 2 January 1977 to 29 December 197719481952195619601964196819721976JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at New Orleans Jefferson meeting 10 mm (0.39 in).
First to last qualifying date each year at New Orleans Jefferson
YearFirst dateLast date
19481948-01-171948-12-29
19491949-01-301949-12-17
19501950-01-061950-12-28
19511951-01-031951-12-19
19521952-01-271952-12-30
19531953-01-171953-12-30
19541954-01-041954-12-31
19551955-01-151955-12-06
19561956-01-181956-12-23
19571957-01-251957-12-28
19581958-01-061958-12-23
19591959-01-151959-12-31
19601960-01-061960-12-31
19611961-01-071961-12-17
19621962-01-051962-12-29
19631963-01-171963-12-31
19641964-01-041964-12-24
19651965-01-021965-12-19
19661966-01-031966-12-31
19671967-01-011967-12-31
19681968-02-151968-12-31
19691969-01-161969-12-25
19701970-01-051970-12-30
19711971-01-041971-12-20
19721972-01-021972-12-30
19731973-02-081973-12-31
19741974-01-031974-12-20
19751975-01-031975-12-30
19761976-01-311976-12-25
19771977-01-021977-12-29

Every Fixed Threshold

Fixed thresholds at New Orleans Jefferson
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3063196155
25 mm (0.98 in): Days with 25 mm or more rain3032197525
50 mm (1.97 in): Days with 50 mm or more rain301119739
100 mm (3.94 in): Days with 100 mm or more rain16319482
200 mm (7.87 in): Days with 200 mm or more rain1119481

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

  • Data for New Orleans Jefferson 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).