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

Days with 100 mm (3.94 in) or more of precipitation in Washington, D.C.

Washington, D.C. has had days with 100 mm (3.94 in) or more of precipitation in 13 years, most in 2006 with 2. Days per year, season span, streaks and every date.

Key Facts for Washington, D.C.

  • Washington, D.C. has had days with 100 mm (3.94 in) or more of precipitation in 13 years, 14 days in all.
  • The most in one year was 2 days in 2006.
  • In 2022, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 21 June 1972.
  • The latest last date in a year was 30 September 2010.
  • The longest run inside a single year was 2 days in 2006.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

13 years, 14 days
Days with 100 mm (3.94 in) or more of precipitation per year in Washington, D.C. Days per year in Washington, D.C. with 100 mm (3.94 in) or more of precipitation. The line is the decade average. The most was 2 in 2006. Grey bars are years with under 90 percent of days observed, left out of rankings. 011221942: 11944: 11955: 11963: 11966: 11969: 11970: 11972: 11976: 12006: 22010: 12018: 12022: 119422010
Days per year in Washington, D.C. with 100 mm (3.94 in) or more of precipitation. The line is the decade average. The most was 2 in 2006. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 100 mm (3.94 in) or more of precipitation per year in Washington, D.C.
YearDaysDecade average
194211
194411
195511
196311
196611
196911
197011
197211
197611
200622
201011
201811
202211

Season Span

earliest 21 June, latest 30 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 mm (3.94 in). Long bars mean a long season. 1942: 8 August 1942 to 8 August 19421944: 2 August 1944 to 2 August 19441955: 12 August 1955 to 12 August 19551963: 20 August 1963 to 20 August 19631966: 14 September 1966 to 14 September 19661969: 22 July 1969 to 22 July 19691970: 9 July 1970 to 9 July 19701972: 21 June 1972 to 21 June 19721976: 16 September 1976 to 16 September 19762006: 25 June 2006 to 26 June 20062010: 30 September 2010 to 30 September 20102018: 21 July 2018 to 21 July 20182022: 9 July 2022 to 9 July 20221942195519661970197620102022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Washington, D.C. meeting 100 mm (3.94 in). Long bars mean a long season.
First to last qualifying date each year in Washington, D.C.
YearFirst dateLast date
19421942-08-081942-08-08
19441944-08-021944-08-02
19551955-08-121955-08-12
19631963-08-201963-08-20
19661966-09-141966-09-14
19691969-07-221969-07-22
19701970-07-091970-07-09
19721972-06-211972-06-21
19761976-09-161976-09-16
20062006-06-252006-06-26
20102010-09-302010-09-30
20182018-07-212018-07-21
20222022-07-092022-07-09

Every Year

Days with 100 mm (3.94 in) or more of precipitation per year in Washington, D.C.
YearDaysFirst dateLast dateLongest streak in yearCoverage
202219 July 20229 July 20221 daysComplete
2018121 July 201821 July 20181 daysComplete
2010130 September 201030 September 20101 daysComplete
2006225 June 200626 June 20062 daysComplete
1976116 September 197616 September 19761 daysComplete
1972121 June 197221 June 19721 daysComplete
197019 July 19709 July 19701 daysComplete
1969122 July 196922 July 19691 daysComplete
1966114 September 196614 September 19661 daysComplete
1963120 August 196320 August 19631 daysComplete
1955112 August 195512 August 19551 daysComplete
194412 August 19442 August 19441 daysComplete
194218 August 19428 August 19421 daysComplete
Decade averages for Days with 100 mm (3.94 in) or more of precipitation in Washington, D.C.
DecadeAverage days per yearYears counted
1940s1.02
1950s1.01
1960s1.03
1970s1.03
2000s2.01
2010s1.02
2020s1.01

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 with 100 mm (3.94 in) or more of precipitation 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).