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Built 2026-10-19 (19 October 2026)

New Orleans WSO City Threshold Days by Year (USC00166659)

13 fixed thresholds counted per year at New Orleans WSO City (USC00166659): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for New Orleans WSO City Thresholds

  • New Orleans WSO City: days with 10 mm (0.39 in) or more of precipitation in 47 years, most in 1977 with 59.
  • New Orleans WSO City: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1947 with 31.
  • New Orleans WSO City: days with 50 mm (1.97 in) or more of precipitation in 47 years, most in 1947 with 15.
  • New Orleans WSO City: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1978 with 149.
  • 13 fixed thresholds have at least one qualifying day at New Orleans WSO City.
36 years with a qualifying day
Days at or above 30 C (86 F) per year at New Orleans WSO City Days per year at New Orleans WSO City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 1978. 0501001501930: 1071931: 1171932: 1101933: 1331934: 1121935: 1241936: 1321937: 1281938: 1291939: 1221940: 1031941: 1411942: 1101943: 1281944: 1371945: 1251946: 1081947: 1321948: 1241949: 1371950: 1231951: 1341952: 1261953: 1261954: 1351955: 1421956: 1151957: 1141958: 1181959: 1371960: 1281961: 1081974: 1131976: 821977: 1401978: 149193019341938194219461950195419581974
Days per year at New Orleans WSO City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 1978.
Days at or above 30 C (86 F) per year at New Orleans WSO City
YearDaysDecade average
1930107121.4
1931117121.4
1932110121.4
1933133121.4
1934112121.4
1935124121.4
1936132121.4
1937128121.4
1938129121.4
1939122121.4
1940103124.5
1941141124.5
1942110124.5
1943128124.5
1944137124.5
1945125124.5
1946108124.5
1947132124.5
1948124124.5
1949137124.5
1950123127
1951134127
1952126127
1953126127
1954135127
1955142127
1956115127
1957114127
1958118127
1959137127
1960128118
1961108118
1974113121
197682121
1977140121
1978149121
First to last qualifying date each year at New Orleans WSO City For each year, a bar from the first to the last day at New Orleans WSO City meeting 30 C (86 F). 1930: 7 April 1930 to 16 October 19301931: 27 May 1931 to 26 October 19311932: 22 April 1932 to 18 October 19321933: 28 April 1933 to 13 October 19331934: 4 May 1934 to 22 October 19341935: 3 May 1935 to 3 November 19351936: 13 April 1936 to 3 November 19361937: 11 May 1937 to 9 October 19371938: 30 April 1938 to 13 November 19381939: 16 May 1939 to 27 October 19391940: 4 April 1940 to 6 October 19401941: 7 May 1941 to 31 October 19411942: 1 May 1942 to 24 October 19421943: 28 April 1943 to 3 October 19431944: 27 April 1944 to 7 October 19441945: 17 March 1945 to 5 October 19451946: 30 March 1946 to 18 October 19461947: 25 April 1947 to 19 October 19471948: 8 April 1948 to 1 October 19481949: 24 April 1949 to 24 October 19491950: 6 May 1950 to 28 October 19501951: 22 April 1951 to 31 October 19511952: 29 April 1952 to 5 October 19521953: 30 April 1953 to 17 October 19531954: 31 March 1954 to 14 October 19541955: 16 March 1955 to 12 October 19551956: 4 April 1956 to 7 October 19561957: 11 May 1957 to 22 September 19571958: 24 April 1958 to 10 October 19581959: 19 April 1959 to 13 October 19591960: 28 April 1960 to 12 October 19601961: 8 May 1961 to 2 October 19611974: 3 May 1974 to 28 September 19741976: 23 April 1976 to 5 October 19761977: 5 May 1977 to 9 October 19771978: 9 April 1978 to 26 October 197819301935194019451950195519601978JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at New Orleans WSO City meeting 30 C (86 F).
First to last qualifying date each year at New Orleans WSO City
YearFirst dateLast date
19301930-04-071930-10-16
19311931-05-271931-10-26
19321932-04-221932-10-18
19331933-04-281933-10-13
19341934-05-041934-10-22
19351935-05-031935-11-03
19361936-04-131936-11-03
19371937-05-111937-10-09
19381938-04-301938-11-13
19391939-05-161939-10-27
19401940-04-041940-10-06
19411941-05-071941-10-31
19421942-05-011942-10-24
19431943-04-281943-10-03
19441944-04-271944-10-07
19451945-03-171945-10-05
19461946-03-301946-10-18
19471947-04-251947-10-19
19481948-04-081948-10-01
19491949-04-241949-10-24
19501950-05-061950-10-28
19511951-04-221951-10-31
19521952-04-291952-10-05
19531953-04-301953-10-17
19541954-03-311954-10-14
19551955-03-161955-10-12
19561956-04-041956-10-07
19571957-05-111957-09-22
19581958-04-241958-10-10
19591959-04-191959-10-13
19601960-04-281960-10-12
19611961-05-081961-10-02
19741974-05-031974-09-28
19761976-04-231976-10-05
19771977-05-051977-10-09
19781978-04-091978-10-26

Every Fixed Threshold

Fixed thresholds at New Orleans WSO City
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days361491978149
35 C (95 F): Days353119779
90 F (32.2 C): Days361051977103
100 F (37.8 C): Days5119301
0 C (32 F): Ice days (max2219401
0 C (32 F): Frost days (min281619408
20 C (68 F): Tropical nights (min361811955163
25 C (77 F): Days with min3566195152
10 mm (0.39 in): Days with 10 mm or more rain4759197753
25 mm (0.98 in): Days with 25 mm or more rain4731194722
50 mm (1.97 in): Days with 50 mm or more rain4715194712
100 mm (3.94 in): Days with 100 mm or more rain26319481
200 mm (7.87 in): Days with 200 mm or more rain3119371

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1930.

Download the Data

  • Data for New Orleans WSO City 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).