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Built 2026-10-19 (19 October 2026)

Days at or above 30 C (86 F) in Washington, D.C.

Washington, D.C. has had days with a maximum temperature at or above 30 C (86 F) in 85 years, most in 2010 with 97. Days per year, season span, streaks and every date.

Key Facts for Washington, D.C.

  • Washington, D.C. has had days with a maximum temperature at or above 30 C (86 F) in 85 years, 5,830 days in all.
  • The most in one year was 97 days in 2010.
  • In 2026, the latest year on file, there were 87 such days.
  • The earliest first date in a year was 12 March 1990.
  • The latest last date in a year was 1 November 1974.
  • The longest run inside a single year was 45 days in 1994.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

85 years, 5,830 days
Days at or above 30 C (86 F) per year in Washington, D.C. Days per year in Washington, D.C. with a maximum temperature at or above 30 C (86 F). The line is the decade average. The most was 97 in 2010. Grey bars are years with under 90 percent of days observed, left out of rankings. 02550751001942: 571943: 761944: 641945: 571946: 451947: 541948: 491949: 601950: 461951: 631952: 691953: 651954: 691955: 541956: 541957: 811958: 541959: 861960: 641961: 731962: 641963: 651964: 751965: 771966: 811967: 561968: 651969: 711970: 891971: 601972: 441973: 781974: 611975: 661976: 731977: 791978: 831979: 551980: 861981: 651982: 521983: 761984: 571985: 551986: 791987: 771988: 691989: 491990: 631991: 941992: 401993: 841994: 791995: 751996: 621997: 671998: 811999: 692000: 382001: 502002: 732003: 382004: 512005: 792006: 602007: 822008: 782009: 552010: 972011: 792012: 802013: 722014: 692015: 912016: 882017: 742018: 852019: 892020: 752021: 742022: 792023: 782024: 822025: 662026: 87194219521962197219821992200220122022
Days per year in Washington, D.C. with a maximum temperature at or above 30 C (86 F). The line is the decade average. The most was 97 in 2010. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days at or above 30 C (86 F) per year in Washington, D.C.
YearDaysDecade average
19425757.8
19437657.8
19446457.8
19455757.8
19464557.8
19475457.8
19484957.8
19496057.8
19504664.1
19516364.1
19526964.1
19536564.1
19546964.1
19555464.1
19565464.1
19578164.1
19585464.1
19598664.1
19606469.1
19617369.1
19626469.1
19636569.1
19647569.1
19657769.1
19668169.1
19675669.1
19686569.1
19697169.1
19708968.8
19716068.8
19724468.8
19737868.8
19746168.8
19756668.8
19767368.8
19777968.8
19788368.8
19795568.8
19808666.5
19816566.5
19825266.5
19837666.5
19845766.5
19855566.5
19867966.5
19877766.5
19886966.5
19894966.5
19906371.4
19919471.4
19924071.4
19938471.4
19947971.4
19957571.4
19966271.4
19976771.4
19988171.4
19996971.4
20003860.4
20015060.4
20027360.4
20033860.4
20045160.4
20057960.4
20066060.4
20078260.4
20087860.4
20095560.4
20109782.4
20117982.4
20128082.4
20137282.4
20146982.4
20159182.4
20168882.4
20177482.4
20188582.4
20198982.4
20207577.3
20217477.3
20227977.3
20237877.3
20248277.3
20256677.3
20268777.3

Season Span

earliest 12 March, latest 1 November
First to last qualifying date each year in Washington, D.C. For each year, a bar from the first to the last day in Washington, D.C. meeting 30 C (86 F). Long bars mean a long season. 1942: 6 April 1942 to 19 September 19421943: 6 May 1943 to 16 September 19431944: 4 May 1944 to 6 September 19441945: 16 March 1945 to 29 September 19451946: 23 April 1946 to 22 September 19461947: 6 April 1947 to 19 September 19471948: 21 March 1948 to 20 September 19481949: 15 April 1949 to 10 October 19491950: 6 May 1950 to 2 October 19501951: 29 April 1951 to 6 October 19511952: 20 April 1952 to 2 October 19521953: 25 April 1953 to 30 September 19531954: 2 May 1954 to 13 October 19541955: 5 May 1955 to 20 September 19551956: 28 April 1956 to 23 September 19561957: 21 April 1957 to 22 September 19571958: 4 May 1958 to 10 October 19581959: 8 April 1959 to 6 October 19591960: 14 April 1960 to 9 September 19601961: 25 April 1961 to 25 September 19611962: 22 April 1962 to 12 October 19621963: 30 March 1963 to 20 September 19631964: 17 April 1964 to 23 September 19641965: 3 May 1965 to 23 September 19651966: 24 April 1966 to 11 September 19661967: 2 April 1967 to 5 October 19671968: 14 April 1968 to 2 October 19681969: 27 April 1969 to 20 October 19691970: 9 May 1970 to 3 October 19701971: 19 May 1971 to 16 September 19711972: 3 June 1972 to 26 September 19721973: 22 April 1973 to 5 October 19731974: 29 April 1974 to 1 November 19741975: 20 May 1975 to 15 October 19751976: 16 April 1976 to 14 September 19761977: 12 April 1977 to 20 September 19771978: 1 April 1978 to 22 September 19781979: 8 May 1979 to 14 September 19791980: 5 May 1980 to 23 September 19801981: 3 April 1981 to 1 October 19811982: 7 May 1982 to 18 September 19821983: 28 April 1983 to 20 September 19831984: 19 May 1984 to 25 September 19841985: 19 April 1985 to 10 September 19851986: 1 May 1986 to 4 October 19861987: 10 May 1987 to 18 September 19871988: 29 May 1988 to 23 September 19881989: 18 May 1989 to 22 September 19891990: 12 March 1990 to 10 October 19901991: 7 April 1991 to 18 September 19911992: 2 May 1992 to 22 September 19921993: 11 May 1993 to 15 September 19931994: 25 April 1994 to 17 September 19941995: 19 April 1995 to 14 September 19951996: 22 April 1996 to 10 September 19961997: 18 May 1997 to 10 October 19971998: 30 March 1998 to 27 September 19981999: 22 May 1999 to 9 September 19992000: 5 May 2000 to 1 September 20002001: 9 April 2001 to 10 September 20012002: 15 April 2002 to 5 October 20022003: 11 June 2003 to 30 August 20032004: 18 April 2004 to 23 September 20042005: 20 April 2005 to 23 September 20052006: 28 May 2006 to 29 August 20062007: 30 April 2007 to 9 October 20072008: 31 May 2008 to 15 September 20082009: 25 April 2009 to 24 September 20092010: 6 April 2010 to 11 October 20102011: 20 April 2011 to 14 September 20112012: 16 April 2012 to 8 September 20122013: 9 April 2013 to 6 October 20132014: 8 May 2014 to 21 September 20142015: 5 May 2015 to 19 September 20152016: 26 April 2016 to 19 October 20162017: 16 April 2017 to 10 October 20172018: 13 April 2018 to 4 October 20182019: 2 May 2019 to 2 October 20192020: 15 May 2020 to 8 September 20202021: 28 April 2021 to 15 September 20212022: 13 April 2022 to 21 September 20222023: 5 April 2023 to 28 October 20232024: 29 April 2024 to 20 September 20242025: 29 March 2025 to 19 September 20252026: 11 March 2026 to 14 October 202619421953196419751986199720082019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Washington, D.C. meeting 30 C (86 F). Long bars mean a long season.
First to last qualifying date each year in Washington, D.C.
YearFirst dateLast date
19421942-04-061942-09-19
19431943-05-061943-09-16
19441944-05-041944-09-06
19451945-03-161945-09-29
19461946-04-231946-09-22
19471947-04-061947-09-19
19481948-03-211948-09-20
19491949-04-151949-10-10
19501950-05-061950-10-02
19511951-04-291951-10-06
19521952-04-201952-10-02
19531953-04-251953-09-30
19541954-05-021954-10-13
19551955-05-051955-09-20
19561956-04-281956-09-23
19571957-04-211957-09-22
19581958-05-041958-10-10
19591959-04-081959-10-06
19601960-04-141960-09-09
19611961-04-251961-09-25
19621962-04-221962-10-12
19631963-03-301963-09-20
19641964-04-171964-09-23
19651965-05-031965-09-23
19661966-04-241966-09-11
19671967-04-021967-10-05
19681968-04-141968-10-02
19691969-04-271969-10-20
19701970-05-091970-10-03
19711971-05-191971-09-16
19721972-06-031972-09-26
19731973-04-221973-10-05
19741974-04-291974-11-01
19751975-05-201975-10-15
19761976-04-161976-09-14
19771977-04-121977-09-20
19781978-04-011978-09-22
19791979-05-081979-09-14
19801980-05-051980-09-23
19811981-04-031981-10-01
19821982-05-071982-09-18
19831983-04-281983-09-20
19841984-05-191984-09-25
19851985-04-191985-09-10
19861986-05-011986-10-04
19871987-05-101987-09-18
19881988-05-291988-09-23
19891989-05-181989-09-22
19901990-03-121990-10-10
19911991-04-071991-09-18
19921992-05-021992-09-22
19931993-05-111993-09-15
19941994-04-251994-09-17
19951995-04-191995-09-14
19961996-04-221996-09-10
19971997-05-181997-10-10
19981998-03-301998-09-27
19991999-05-221999-09-09
20002000-05-052000-09-01
20012001-04-092001-09-10
20022002-04-152002-10-05
20032003-06-112003-08-30
20042004-04-182004-09-23
20052005-04-202005-09-23
20062006-05-282006-08-29
20072007-04-302007-10-09
20082008-05-312008-09-15
20092009-04-252009-09-24
20102010-04-062010-10-11
20112011-04-202011-09-14
20122012-04-162012-09-08
20132013-04-092013-10-06
20142014-05-082014-09-21
20152015-05-052015-09-19
20162016-04-262016-10-19
20172017-04-162017-10-10
20182018-04-132018-10-04
20192019-05-022019-10-02
20202020-05-152020-09-08
20212021-04-282021-09-15
20222022-04-132022-09-21
20232023-04-052023-10-28
20242024-04-292024-09-20
20252025-03-292025-09-19
20262026-03-112026-10-14

Every Year

Days at or above 30 C (86 F) per year in Washington, D.C.
YearDaysFirst dateLast dateLongest streak in yearCoverage
20268711 March 202614 October 202611 daysIncomplete, not ranked
20256629 March 202519 September 202521 daysComplete
20248229 April 202420 September 202415 daysComplete
2023785 April 202328 October 202333 daysComplete
20227913 April 202221 September 202216 daysComplete
20217428 April 202115 September 20218 daysComplete
20207515 May 20208 September 202040 daysComplete
2019892 May 20192 October 201917 daysComplete
20188513 April 20184 October 201816 daysComplete
20177416 April 201710 October 201718 daysComplete
20168826 April 201619 October 201629 daysComplete
2015915 May 201519 September 201519 daysComplete
2014698 May 201421 September 201411 daysComplete
2013729 April 20136 October 201312 daysComplete
20128016 April 20128 September 201227 daysComplete
20117920 April 201114 September 201129 daysComplete
2010976 April 201011 October 201021 daysComplete
20095525 April 200924 September 200915 daysComplete
20087831 May 200815 September 200817 daysComplete
20078230 April 20079 October 200719 daysComplete
20066028 May 200629 August 200616 daysComplete
20057920 April 200523 September 200515 daysComplete
20045118 April 200423 September 20046 daysComplete
20033811 June 200330 August 20036 daysComplete
20027315 April 20025 October 200217 daysComplete
2001509 April 200110 September 20019 daysComplete
2000385 May 20001 September 20006 daysComplete
19996922 May 19999 September 199925 daysComplete
19988130 March 199827 September 199813 daysComplete
19976718 May 199710 October 199717 daysComplete
19966222 April 199610 September 19969 daysComplete
19957519 April 199514 September 199526 daysComplete
19947925 April 199417 September 199445 daysComplete
19938411 May 199315 September 199316 daysComplete
1992402 May 199222 September 199213 daysComplete
1991947 April 199118 September 199116 daysComplete
19906312 March 199010 October 199010 daysComplete
19894918 May 198922 September 19899 daysComplete
19886929 May 198823 September 198822 daysComplete
19877710 May 198718 September 198720 daysComplete
1986791 May 19864 October 198625 daysComplete
19855519 April 198510 September 19859 daysComplete
19845719 May 198425 September 19849 daysComplete
19837628 April 198320 September 198317 daysComplete
1982527 May 198218 September 19828 daysComplete
1981653 April 19811 October 19819 daysComplete
1980865 May 198023 September 198022 daysComplete
1979558 May 197914 September 197912 daysComplete
1978831 April 197822 September 197814 daysComplete
19777912 April 197720 September 197727 daysComplete
19767316 April 197614 September 197612 daysComplete
19756620 May 197515 October 197510 daysComplete
19746129 April 19741 November 197411 daysComplete
19737822 April 19735 October 197314 daysComplete
1972443 June 197226 September 197214 daysComplete
19716019 May 197116 September 19718 daysComplete
1970899 May 19703 October 197011 daysComplete
19697127 April 196920 October 196914 daysComplete
19686514 April 19682 October 196814 daysComplete
1967562 April 19675 October 19677 daysComplete
19668124 April 196611 September 196625 daysComplete
1965773 May 196523 September 196510 daysComplete
19647517 April 196423 September 196410 daysComplete
19636530 March 196320 September 196314 daysComplete
19626422 April 196212 October 19625 daysComplete
19617325 April 196125 September 196120 daysComplete
19606414 April 19609 September 19607 daysComplete
1959868 April 19596 October 195912 daysComplete
1958544 May 195810 October 195810 daysComplete
19578121 April 195722 September 195712 daysComplete
19565428 April 195623 September 19566 daysComplete
1955545 May 195520 September 195515 daysComplete
1954692 May 195413 October 19549 daysComplete
19536525 April 195330 September 195314 daysComplete
19526920 April 19522 October 195222 daysComplete
19516329 April 19516 October 195110 daysComplete
1950466 May 19502 October 19509 daysComplete
19496015 April 194910 October 194914 daysComplete
19484921 March 194820 September 19488 daysComplete
1947546 April 194719 September 19477 daysComplete
19464523 April 194622 September 19468 daysComplete
19455716 March 194529 September 19458 daysComplete
1944644 May 19446 September 194411 daysComplete
1943766 May 194316 September 194334 daysComplete
1942576 April 194219 September 194210 daysComplete
Decade averages for Days at or above 30 C (86 F) in Washington, D.C.
DecadeAverage days per yearYears counted
1940s57.88
1950s64.110
1960s69.110
1970s68.810
1980s66.510
1990s71.410
2000s60.410
2010s82.410
2020s75.76

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 30 C (86 F) in Washington, D.C., 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).