Daily records
Page built 2026-10-19
Data as of 2026-10-17
Search
Built 2026-10-19 (19 October 2026)

Days at or above 100 F (37.8 C) in Washington, D.C.

Washington, D.C. has had days with a maximum temperature at or above 100 F (37.8 C) in 29 years, most in 2012 with 8. 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 100 F (37.8 C) in 29 years, 84 days in all.
  • The most in one year was 8 days in 2012.
  • In 2026, the latest year on file, there were 4 such days.
  • The earliest first date in a year was 9 June 2011.
  • The latest last date in a year was 2 September 1980.
  • The longest run inside a single year was 4 days in 2012.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

29 years, 84 days
Days at or above 100 F (37.8 C) per year in Washington, D.C. Days per year in Washington, D.C. with a maximum temperature at or above 100 F (37.8 C). The line is the decade average. The most was 8 in 2012. Grey bars are years with under 90 percent of days observed, left out of rankings. 024681952: 11953: 21954: 41957: 21959: 21964: 11966: 11969: 11977: 11978: 11980: 61983: 11987: 31988: 71990: 11991: 21993: 41994: 11997: 51999: 32002: 22006: 12007: 12010: 42011: 52012: 82016: 42024: 62026: 4195219802002
Days per year in Washington, D.C. with a maximum temperature at or above 100 F (37.8 C). The line is the decade average. The most was 8 in 2012. 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 Washington, D.C.
YearDaysDecade average
195212.2
195322.2
195442.2
195722.2
195922.2
196411
196611
196911
197711
197811
198064.3
198314.3
198734.3
198874.3
199012.7
199122.7
199342.7
199412.7
199752.7
199932.7
200221.3
200611.3
200711.3
201045.3
201155.3
201285.3
201645.3
202465
202645

Season Span

earliest 9 June, latest 2 September
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 100 F (37.8 C). Long bars mean a long season. 1952: 26 June 1952 to 26 June 19521953: 31 August 1953 to 2 September 19531954: 26 June 1954 to 31 July 19541957: 21 July 1957 to 22 July 19571959: 29 June 1959 to 30 June 19591964: 10 June 1964 to 10 June 19641966: 3 July 1966 to 3 July 19661969: 28 June 1969 to 28 June 19691977: 6 July 1977 to 6 July 19771978: 23 July 1978 to 23 July 19781980: 16 July 1980 to 2 September 19801983: 20 August 1983 to 20 August 19831987: 21 July 1987 to 27 August 19871988: 22 June 1988 to 17 August 19881990: 5 July 1990 to 5 July 19901991: 21 July 1991 to 23 July 19911993: 8 July 1993 to 28 July 19931994: 15 June 1994 to 15 June 19941997: 25 June 1997 to 17 August 19971999: 5 July 1999 to 31 July 19992002: 2 August 2002 to 13 August 20022006: 3 August 2006 to 3 August 20062007: 8 August 2007 to 8 August 20072010: 24 June 2010 to 24 July 20102011: 9 June 2011 to 1 August 20112012: 29 June 2012 to 26 July 20122016: 25 July 2016 to 15 August 20162024: 22 June 2024 to 28 August 20242026: 12 June 2026 to 4 July 202619521959197719871993200220112026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Washington, D.C. meeting 100 F (37.8 C). Long bars mean a long season.
First to last qualifying date each year in Washington, D.C.
YearFirst dateLast date
19521952-06-261952-06-26
19531953-08-311953-09-02
19541954-06-261954-07-31
19571957-07-211957-07-22
19591959-06-291959-06-30
19641964-06-101964-06-10
19661966-07-031966-07-03
19691969-06-281969-06-28
19771977-07-061977-07-06
19781978-07-231978-07-23
19801980-07-161980-09-02
19831983-08-201983-08-20
19871987-07-211987-08-27
19881988-06-221988-08-17
19901990-07-051990-07-05
19911991-07-211991-07-23
19931993-07-081993-07-28
19941994-06-151994-06-15
19971997-06-251997-08-17
19991999-07-051999-07-31
20022002-08-022002-08-13
20062006-08-032006-08-03
20072007-08-082007-08-08
20102010-06-242010-07-24
20112011-06-092011-08-01
20122012-06-292012-07-26
20162016-07-252016-08-15
20242024-06-222024-08-28
20262026-06-122026-07-04

Every Year

Days at or above 100 F (37.8 C) per year in Washington, D.C.
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026412 June 20264 July 20263 daysIncomplete, not ranked
2024622 June 202428 August 20244 daysComplete
2016425 July 201615 August 20163 daysComplete
2012829 June 201226 July 20124 daysComplete
201159 June 20111 August 20112 daysComplete
2010424 June 201024 July 20102 daysComplete
200718 August 20078 August 20071 daysComplete
200613 August 20063 August 20061 daysComplete
200222 August 200213 August 20021 daysComplete
199935 July 199931 July 19992 daysComplete
1997525 June 199717 August 19972 daysComplete
1994115 June 199415 June 19941 daysComplete
199348 July 199328 July 19933 daysComplete
1991221 July 199123 July 19911 daysComplete
199015 July 19905 July 19901 daysComplete
1988722 June 198817 August 19883 daysComplete
1987321 July 198727 August 19871 daysComplete
1983120 August 198320 August 19831 daysComplete
1980616 July 19802 September 19802 daysComplete
1978123 July 197823 July 19781 daysComplete
197716 July 19776 July 19771 daysComplete
1969128 June 196928 June 19691 daysComplete
196613 July 19663 July 19661 daysComplete
1964110 June 196410 June 19641 daysComplete
1959229 June 195930 June 19592 daysComplete
1957221 July 195722 July 19572 daysComplete
1954426 June 195431 July 19542 daysComplete
1953231 August 19532 September 19531 daysComplete
1952126 June 195226 June 19521 daysComplete
Decade averages for Days at or above 100 F (37.8 C) in Washington, D.C.
DecadeAverage days per yearYears counted
1950s2.25
1960s1.03
1970s1.02
1980s4.34
1990s2.76
2000s1.33
2010s5.34
2020s6.01

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 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).