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Built 2026-10-19 (19 October 2026)

Days at or above 100 F (37.8 C) in Los Angeles

Los Angeles has had days with a maximum temperature at or above 100 F (37.8 C) in 72 years, most in 1955 with 8. Days per year, season span, streaks and every date.

Key Facts for Los Angeles

  • Los Angeles has had days with a maximum temperature at or above 100 F (37.8 C) in 72 years, 197 days in all.
  • The most in one year was 8 days in 1955.
  • In 2026, the latest year on file, there were 6 such days.
  • The earliest first date in a year was 4 April 1989.
  • The latest last date in a year was 1 November 1966.
  • The longest run inside a single year was 8 days in 1955.
  • 5 years with under 90 percent of days observed are left out of these rankings.

Days per Year

72 years, 197 days
Days at or above 100 F (37.8 C) per year in Los Angeles Days per year in Los Angeles with a maximum temperature at or above 100 F (37.8 C). The line is the decade average. The most was 8 in 1955. Grey bars are years with under 90 percent of days observed, left out of rankings. 024681909: 31910: 11912: 11913: 11921: 11922: 11924: 11926: 11929: 11933: 11939: 71943: 11944: 21948: 11949: 21950: 11953: 21955: 81956: 21957: 31958: 41959: 21960: 11961: 21963: 51965: 11966: 11967: 41968: 11970: 21971: 61972: 61973: 51975: 21976: 21978: 41979: 51980: 11981: 51982: 11983: 31984: 51985: 61986: 11987: 41988: 41989: 41990: 31991: 21992: 11994: 41995: 41997: 21998: 51999: 22002: 12004: 32006: 12007: 12008: 12009: 52010: 22012: 22014: 22015: 42016: 22017: 62018: 22020: 32022: 12024: 42026: 619091939195819711983199420092024
Days per year in Los Angeles with a maximum temperature at or above 100 F (37.8 C). The line is the decade average. The most was 8 in 1955. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days at or above 100 F (37.8 C) per year in Los Angeles
YearDaysDecade average
190933
191011
191211
191311
192111
192211
192411
192611
192911
193314
193974
194311.5
194421.5
194811.5
194921.5
195013.1
195323.1
195583.1
195623.1
195733.1
195843.1
195923.1
196012.1
196122.1
196352.1
196512.1
196612.1
196742.1
196812.1
197024
197164
197264
197354
197524
197624
197844
197954
198013.4
198153.4
198213.4
198333.4
198453.4
198563.4
198613.4
198743.4
198843.4
198943.4
199032.9
199122.9
199212.9
199442.9
199542.9
199722.9
199852.9
199922.9
200212
200432
200612
200712
200812
200952
201022.9
201222.9
201422.9
201542.9
201622.9
201762.9
201822.9
202033.5
202213.5
202443.5
202663.5

Season Span

earliest 4 April, latest 1 November
First to last qualifying date each year in Los Angeles For each year, a bar from the first to the last day in Los Angeles meeting 100 F (37.8 C). Long bars mean a long season. 1909: 29 August 1909 to 16 September 19091910: 23 April 1910 to 23 April 19101912: 19 September 1912 to 19 September 19121913: 17 September 1913 to 17 September 19131921: 26 September 1921 to 26 September 19211922: 17 September 1922 to 17 September 19221924: 29 September 1924 to 29 September 19241926: 25 August 1926 to 25 August 19261929: 21 October 1929 to 21 October 19291933: 4 October 1933 to 4 October 19331939: 17 September 1939 to 23 September 19391943: 22 September 1943 to 22 September 19431944: 8 September 1944 to 23 September 19441948: 11 September 1948 to 11 September 19481949: 7 September 1949 to 23 September 19491950: 13 October 1950 to 13 October 19501953: 4 October 1953 to 5 October 19531955: 31 August 1955 to 7 September 19551956: 9 September 1956 to 10 September 19561957: 17 June 1957 to 4 July 19571958: 3 October 1958 to 17 October 19581959: 10 July 1959 to 11 September 19591960: 20 July 1960 to 20 July 19601961: 14 October 1961 to 15 October 19611963: 25 September 1963 to 29 September 19631965: 22 October 1965 to 22 October 19651966: 1 November 1966 to 1 November 19661967: 16 May 1967 to 1 September 19671968: 23 August 1968 to 23 August 19681970: 15 May 1970 to 27 September 19701971: 12 September 1971 to 11 October 19711972: 27 July 1972 to 29 August 19721973: 28 May 1973 to 3 July 19731975: 23 September 1975 to 24 September 19751976: 24 June 1976 to 27 June 19761978: 23 September 1978 to 26 September 19781979: 10 June 1979 to 16 September 19791980: 30 July 1980 to 30 July 19801981: 15 June 1981 to 27 August 19811982: 2 September 1982 to 2 September 19821983: 6 August 1983 to 11 September 19831984: 4 September 1984 to 16 September 19841985: 30 June 1985 to 25 August 19851986: 18 August 1986 to 18 August 19861987: 1 September 1987 to 4 October 19871988: 3 September 1988 to 9 October 19881989: 4 April 1989 to 7 April 19891990: 5 May 1990 to 27 June 19901991: 1 October 1991 to 10 October 19911992: 23 September 1992 to 23 September 19921994: 26 June 1994 to 8 October 19941995: 28 July 1995 to 2 October 19951997: 5 August 1997 to 15 October 19971998: 9 August 1998 to 3 September 19981999: 29 September 1999 to 30 September 19992002: 1 September 2002 to 1 September 20022004: 27 April 2004 to 5 September 20042006: 22 July 2006 to 22 July 20062007: 2 September 2007 to 2 September 20072008: 1 October 2008 to 1 October 20082009: 20 April 2009 to 24 September 20092010: 26 September 2010 to 27 September 20102012: 14 September 2012 to 15 September 20122014: 15 May 2014 to 16 September 20142015: 9 September 2015 to 11 October 20152016: 20 June 2016 to 26 September 20162017: 31 August 2017 to 25 October 20172018: 6 July 2018 to 7 July 20182020: 6 September 2020 to 1 October 20202022: 4 September 2022 to 4 September 20222024: 5 September 2024 to 9 September 20242026: 9 September 2026 to 6 October 202619091933195619671979198819992014JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Los Angeles meeting 100 F (37.8 C). Long bars mean a long season.
First to last qualifying date each year in Los Angeles
YearFirst dateLast date
19091909-08-291909-09-16
19101910-04-231910-04-23
19121912-09-191912-09-19
19131913-09-171913-09-17
19211921-09-261921-09-26
19221922-09-171922-09-17
19241924-09-291924-09-29
19261926-08-251926-08-25
19291929-10-211929-10-21
19331933-10-041933-10-04
19391939-09-171939-09-23
19431943-09-221943-09-22
19441944-09-081944-09-23
19481948-09-111948-09-11
19491949-09-071949-09-23
19501950-10-131950-10-13
19531953-10-041953-10-05
19551955-08-311955-09-07
19561956-09-091956-09-10
19571957-06-171957-07-04
19581958-10-031958-10-17
19591959-07-101959-09-11
19601960-07-201960-07-20
19611961-10-141961-10-15
19631963-09-251963-09-29
19651965-10-221965-10-22
19661966-11-011966-11-01
19671967-05-161967-09-01
19681968-08-231968-08-23
19701970-05-151970-09-27
19711971-09-121971-10-11
19721972-07-271972-08-29
19731973-05-281973-07-03
19751975-09-231975-09-24
19761976-06-241976-06-27
19781978-09-231978-09-26
19791979-06-101979-09-16
19801980-07-301980-07-30
19811981-06-151981-08-27
19821982-09-021982-09-02
19831983-08-061983-09-11
19841984-09-041984-09-16
19851985-06-301985-08-25
19861986-08-181986-08-18
19871987-09-011987-10-04
19881988-09-031988-10-09
19891989-04-041989-04-07
19901990-05-051990-06-27
19911991-10-011991-10-10
19921992-09-231992-09-23
19941994-06-261994-10-08
19951995-07-281995-10-02
19971997-08-051997-10-15
19981998-08-091998-09-03
19991999-09-291999-09-30
20022002-09-012002-09-01
20042004-04-272004-09-05
20062006-07-222006-07-22
20072007-09-022007-09-02
20082008-10-012008-10-01
20092009-04-202009-09-24
20102010-09-262010-09-27
20122012-09-142012-09-15
20142014-05-152014-09-16
20152015-09-092015-10-11
20162016-06-202016-09-26
20172017-08-312017-10-25
20182018-07-062018-07-07
20202020-09-062020-10-01
20222022-09-042022-09-04
20242024-09-052024-09-09
20262026-09-092026-10-06

Every Year

Days at or above 100 F (37.8 C) per year in Los Angeles
YearDaysFirst dateLast dateLongest streak in yearCoverage
202669 September 20266 October 20265 daysIncomplete, not ranked
202445 September 20249 September 20242 daysComplete
202214 September 20224 September 20221 daysComplete
202036 September 20201 October 20202 daysComplete
201826 July 20187 July 20182 daysComplete
2017631 August 201725 October 20173 daysComplete
2016220 June 201626 September 20161 daysComplete
201549 September 201511 October 20153 daysComplete
2014215 May 201416 September 20141 daysComplete
2012214 September 201215 September 20122 daysComplete
2010226 September 201027 September 20102 daysComplete
2009520 April 200924 September 20092 daysComplete
200811 October 20081 October 20081 daysComplete
200712 September 20072 September 20071 daysComplete
2006122 July 200622 July 20061 daysComplete
2004327 April 20045 September 20041 daysComplete
200211 September 20021 September 20021 daysComplete
1999229 September 199930 September 19992 daysComplete
199859 August 19983 September 19982 daysComplete
199725 August 199715 October 19971 daysComplete
1995428 July 19952 October 19952 daysComplete
1994426 June 19948 October 19942 daysComplete
1992123 September 199223 September 19921 daysComplete
199121 October 199110 October 19911 daysComplete
199035 May 199027 June 19902 daysComplete
198944 April 19897 April 19894 daysComplete
198843 September 19889 October 19883 daysComplete
198741 September 19874 October 19872 daysComplete
1986118 August 198618 August 19861 daysComplete
1985630 June 198525 August 19854 daysComplete
198454 September 198416 September 19843 daysComplete
198336 August 198311 September 19832 daysComplete
198212 September 19822 September 19821 daysComplete
1981515 June 198127 August 19813 daysComplete
1980130 July 198030 July 19801 daysComplete
1979510 June 197916 September 19793 daysComplete
1978423 September 197826 September 19784 daysComplete
1976224 June 197627 June 19761 daysComplete
1975223 September 197524 September 19752 daysComplete
1973528 May 19733 July 19733 daysComplete
1972627 July 197229 August 19722 daysComplete
1971612 September 197111 October 19712 daysComplete
1970215 May 197027 September 19701 daysComplete
1968123 August 196823 August 19681 daysComplete
1967416 May 19671 September 19673 daysComplete
196611 November 19661 November 19661 daysComplete
1965122 October 196522 October 19651 daysComplete
1963525 September 196329 September 19635 daysComplete
1961214 October 196115 October 19612 daysComplete
1960120 July 196020 July 19601 daysComplete
1959210 July 195911 September 19591 daysComplete
195843 October 195817 October 19583 daysComplete
1957317 June 19574 July 19572 daysComplete
195629 September 195610 September 19562 daysComplete
1955831 August 19557 September 19558 daysComplete
195324 October 19535 October 19532 daysComplete
1950113 October 195013 October 19501 daysComplete
194927 September 194923 September 19491 daysComplete
1948111 September 194811 September 19481 daysComplete
194428 September 194423 September 19441 daysComplete
1943122 September 194322 September 19431 daysComplete
1939717 September 193923 September 19397 daysComplete
193314 October 19334 October 19331 daysComplete
1929121 October 192921 October 19291 daysComplete
1926125 August 192625 August 19261 daysComplete
1924129 September 192429 September 19241 daysComplete
1922117 September 192217 September 19221 daysComplete
1921126 September 192126 September 19211 daysComplete
1913117 September 191317 September 19131 daysComplete
1912119 September 191219 September 19121 daysComplete
1910123 April 191023 April 19101 daysComplete
1909329 August 190916 September 19092 daysComplete
Decade averages for Days at or above 100 F (37.8 C) in Los Angeles
DecadeAverage days per yearYears counted
1900s3.01
1910s1.03
1920s1.05
1930s4.02
1940s1.54
1950s3.17
1960s2.17
1970s4.08
1980s3.410
1990s2.98
2000s2.06
2010s2.97
2020s2.73

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Days at or above 100 F (37.8 C) in Los Angeles, 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 from the threaded city record.

Data as of . Last revised (2026-10-17).