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Built 2026-10-19 (19 October 2026)

Days with 25 mm (0.98 in) or more of precipitation in Boston

Boston has had days with 25 mm (0.98 in) or more of precipitation in 91 years, most in 1953 with 20. Days per year, season span, streaks and every date.

Key Facts for Boston

  • Boston has had days with 25 mm (0.98 in) or more of precipitation in 91 years, 952 days in all.
  • The most in one year was 20 days in 1953.
  • In 2026, the latest year on file, there were 8 such days.
  • The earliest first date in a year was 1 January 1938.
  • The latest last date in a year was 30 December 1942.
  • The longest run inside a single year was 3 days in 1938.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

91 years, 952 days
Days with 25 mm (0.98 in) or more of precipitation per year in Boston Days per year in Boston with 25 mm (0.98 in) or more of precipitation. The line is the decade average. The most was 20 in 1953. Grey bars are years with under 90 percent of days observed, left out of rankings. 051015201936: 171937: 121938: 131939: 51940: 101941: 91942: 121943: 31944: 111945: 101946: 101947: 101948: 51949: 31950: 81951: 121952: 101953: 201954: 151955: 161956: 101957: 41958: 191959: 131960: 151961: 151962: 111963: 71964: 101965: 41966: 81967: 131968: 121969: 141970: 91971: 71972: 141973: 101974: 91975: 131976: 71977: 141978: 81979: 131980: 61981: 71982: 121983: 151984: 161985: 71986: 111987: 121988: 71989: 91990: 91991: 91992: 81993: 111994: 141995: 81996: 111997: 31998: 181999: 72000: 92001: 52002: 72003: 132004: 112005: 72006: 102007: 112008: 142009: 112010: 152011: 152012: 82013: 112014: 112015: 52016: 92017: 112018: 162019: 142020: 92021: 172022: 42023: 142024: 92025: 82026: 81936194619561966197619861996200620162026
Days per year in Boston with 25 mm (0.98 in) or more of precipitation. The line is the decade average. The most was 20 in 1953. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 25 mm (0.98 in) or more of precipitation per year in Boston
YearDaysDecade average
19361711.8
19371211.8
19381311.8
1939511.8
1940108.3
194198.3
1942128.3
194338.3
1944118.3
1945108.3
1946108.3
1947108.3
194858.3
194938.3
1950812.7
19511212.7
19521012.7
19532012.7
19541512.7
19551612.7
19561012.7
1957412.7
19581912.7
19591312.7
19601510.9
19611510.9
19621110.9
1963710.9
19641010.9
1965410.9
1966810.9
19671310.9
19681210.9
19691410.9
1970910.4
1971710.4
19721410.4
19731010.4
1974910.4
19751310.4
1976710.4
19771410.4
1978810.4
19791310.4
1980610.2
1981710.2
19821210.2
19831510.2
19841610.2
1985710.2
19861110.2
19871210.2
1988710.2
1989910.2
199099.8
199199.8
199289.8
1993119.8
1994149.8
199589.8
1996119.8
199739.8
1998189.8
199979.8
200099.8
200159.8
200279.8
2003139.8
2004119.8
200579.8
2006109.8
2007119.8
2008149.8
2009119.8
20101511.5
20111511.5
2012811.5
20131111.5
20141111.5
2015511.5
2016911.5
20171111.5
20181611.5
20191411.5
202099.9
2021179.9
202249.9
2023149.9
202499.9
202589.9
202689.9

Season Span

earliest 1 January, latest 30 December
First to last qualifying date each year in Boston For each year, a bar from the first to the last day in Boston meeting 25 mm (0.98 in). Long bars mean a long season. 1936: 3 January 1936 to 20 December 19361937: 15 March 1937 to 6 December 19371938: 1 January 1938 to 19 November 19381939: 30 January 1939 to 5 November 19391940: 14 February 1940 to 16 December 19401941: 25 January 1941 to 14 December 19411942: 19 January 1942 to 30 December 19421943: 28 January 1943 to 27 October 19431944: 6 January 1944 to 30 November 19441945: 8 February 1945 to 29 December 19451946: 21 January 1946 to 21 December 19461947: 2 March 1947 to 26 December 19471948: 21 January 1948 to 20 November 19481949: 1 September 1949 to 4 November 19491950: 15 February 1950 to 8 December 19501951: 20 March 1951 to 18 December 19511952: 5 January 1952 to 11 December 19521953: 3 January 1953 to 14 December 19531954: 17 April 1954 to 18 December 19541955: 11 February 1955 to 5 November 19551956: 9 January 1956 to 14 December 19561957: 5 April 1957 to 26 December 19571958: 7 January 1958 to 4 December 19581959: 2 January 1959 to 28 December 19591960: 19 February 1960 to 21 December 19601961: 1 January 1961 to 3 October 19611962: 6 January 1962 to 6 December 19621963: 12 February 1963 to 29 November 19631964: 20 January 1964 to 27 December 19641965: 24 January 1965 to 13 September 19651966: 23 January 1966 to 6 November 19661967: 27 January 1967 to 28 December 19671968: 25 January 1968 to 28 December 19681969: 9 February 1969 to 27 December 19691970: 3 February 1970 to 17 December 19701971: 8 February 1971 to 29 November 19711972: 3 February 1972 to 6 December 19721973: 29 January 1973 to 17 December 19731974: 19 February 1974 to 2 December 19741975: 7 January 1975 to 26 December 19751976: 28 January 1976 to 7 December 19761977: 7 January 1977 to 21 December 19771978: 9 January 1978 to 9 December 19781979: 2 January 1979 to 3 November 19791980: 14 March 1980 to 18 November 19801981: 24 February 1981 to 15 December 19811982: 1 January 1982 to 13 November 19821983: 15 January 1983 to 13 December 19831984: 4 February 1984 to 2 October 19841985: 3 May 1985 to 5 November 19851986: 14 March 1986 to 19 December 19861987: 2 January 1987 to 4 October 19871988: 12 February 1988 to 20 November 19881989: 21 February 1989 to 3 November 19891990: 29 January 1990 to 4 December 19901991: 4 March 1991 to 11 November 19911992: 4 January 1992 to 12 December 19921993: 12 February 1993 to 21 December 19931994: 4 January 1994 to 24 December 19941995: 1 January 1995 to 14 November 19951996: 12 January 1996 to 19 December 19961997: 31 March 1997 to 9 November 19971998: 24 January 1998 to 10 October 19981999: 3 January 1999 to 18 October 19992000: 28 March 2000 to 17 December 20002001: 22 March 2001 to 12 August 20012002: 13 May 2002 to 20 December 20022003: 17 February 2003 to 6 December 20032004: 31 March 2004 to 7 December 20042005: 28 March 2005 to 22 November 20052006: 13 May 2006 to 23 November 20062007: 14 February 2007 to 16 December 20072008: 11 January 2008 to 12 December 20082009: 7 January 2009 to 9 December 20092010: 24 February 2010 to 12 December 20102011: 12 January 2011 to 7 December 20112012: 22 April 2012 to 27 December 20122013: 9 February 2013 to 29 December 20132014: 5 February 2014 to 9 December 20142015: 21 June 2015 to 29 December 20152016: 10 January 2016 to 29 December 20162017: 24 January 2017 to 29 October 20172018: 4 January 2018 to 13 November 20182019: 20 January 2019 to 30 December 20192020: 23 March 2020 to 25 December 20202021: 16 January 2021 to 30 October 20212022: 4 February 2022 to 16 December 20222023: 14 March 2023 to 18 December 20232024: 10 January 2024 to 11 December 20242025: 16 February 2025 to 13 October 20252026: 16 March 2026 to 11 October 202619361948196019721984199620082020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Boston meeting 25 mm (0.98 in). Long bars mean a long season.
First to last qualifying date each year in Boston
YearFirst dateLast date
19361936-01-031936-12-20
19371937-03-151937-12-06
19381938-01-011938-11-19
19391939-01-301939-11-05
19401940-02-141940-12-16
19411941-01-251941-12-14
19421942-01-191942-12-30
19431943-01-281943-10-27
19441944-01-061944-11-30
19451945-02-081945-12-29
19461946-01-211946-12-21
19471947-03-021947-12-26
19481948-01-211948-11-20
19491949-09-011949-11-04
19501950-02-151950-12-08
19511951-03-201951-12-18
19521952-01-051952-12-11
19531953-01-031953-12-14
19541954-04-171954-12-18
19551955-02-111955-11-05
19561956-01-091956-12-14
19571957-04-051957-12-26
19581958-01-071958-12-04
19591959-01-021959-12-28
19601960-02-191960-12-21
19611961-01-011961-10-03
19621962-01-061962-12-06
19631963-02-121963-11-29
19641964-01-201964-12-27
19651965-01-241965-09-13
19661966-01-231966-11-06
19671967-01-271967-12-28
19681968-01-251968-12-28
19691969-02-091969-12-27
19701970-02-031970-12-17
19711971-02-081971-11-29
19721972-02-031972-12-06
19731973-01-291973-12-17
19741974-02-191974-12-02
19751975-01-071975-12-26
19761976-01-281976-12-07
19771977-01-071977-12-21
19781978-01-091978-12-09
19791979-01-021979-11-03
19801980-03-141980-11-18
19811981-02-241981-12-15
19821982-01-011982-11-13
19831983-01-151983-12-13
19841984-02-041984-10-02
19851985-05-031985-11-05
19861986-03-141986-12-19
19871987-01-021987-10-04
19881988-02-121988-11-20
19891989-02-211989-11-03
19901990-01-291990-12-04
19911991-03-041991-11-11
19921992-01-041992-12-12
19931993-02-121993-12-21
19941994-01-041994-12-24
19951995-01-011995-11-14
19961996-01-121996-12-19
19971997-03-311997-11-09
19981998-01-241998-10-10
19991999-01-031999-10-18
20002000-03-282000-12-17
20012001-03-222001-08-12
20022002-05-132002-12-20
20032003-02-172003-12-06
20042004-03-312004-12-07
20052005-03-282005-11-22
20062006-05-132006-11-23
20072007-02-142007-12-16
20082008-01-112008-12-12
20092009-01-072009-12-09
20102010-02-242010-12-12
20112011-01-122011-12-07
20122012-04-222012-12-27
20132013-02-092013-12-29
20142014-02-052014-12-09
20152015-06-212015-12-29
20162016-01-102016-12-29
20172017-01-242017-10-29
20182018-01-042018-11-13
20192019-01-202019-12-30
20202020-03-232020-12-25
20212021-01-162021-10-30
20222022-02-042022-12-16
20232023-03-142023-12-18
20242024-01-102024-12-11
20252025-02-162025-10-13
20262026-03-162026-10-11

Every Year

Days with 25 mm (0.98 in) or more of precipitation per year in Boston
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026816 March 202611 October 20263 daysIncomplete, not ranked
2025816 February 202513 October 20251 daysComplete
2024910 January 202411 December 20241 daysComplete
20231414 March 202318 December 20231 daysComplete
202244 February 202216 December 20222 daysComplete
20211716 January 202130 October 20213 daysComplete
2020923 March 202025 December 20201 daysComplete
20191420 January 201930 December 20191 daysComplete
2018164 January 201813 November 20181 daysComplete
20171124 January 201729 October 20171 daysComplete
2016910 January 201629 December 20161 daysComplete
2015521 June 201529 December 20151 daysComplete
2014115 February 20149 December 20141 daysComplete
2013119 February 201329 December 20131 daysComplete
2012822 April 201227 December 20122 daysComplete
20111512 January 20117 December 20111 daysComplete
20101524 February 201012 December 20103 daysComplete
2009117 January 20099 December 20091 daysComplete
20081411 January 200812 December 20082 daysComplete
20071114 February 200716 December 20071 daysComplete
20061013 May 200623 November 20062 daysComplete
2005728 March 200522 November 20052 daysComplete
20041131 March 20047 December 20042 daysComplete
20031317 February 20036 December 20031 daysComplete
2002713 May 200220 December 20021 daysComplete
2001522 March 200112 August 20011 daysComplete
2000928 March 200017 December 20002 daysComplete
199973 January 199918 October 19991 daysComplete
19981824 January 199810 October 19983 daysComplete
1997331 March 19979 November 19971 daysComplete
19961112 January 199619 December 19962 daysComplete
199581 January 199514 November 19952 daysComplete
1994144 January 199424 December 19941 daysComplete
19931112 February 199321 December 19932 daysComplete
199284 January 199212 December 19922 daysComplete
199194 March 199111 November 19912 daysComplete
1990929 January 19904 December 19901 daysComplete
1989921 February 19893 November 19891 daysComplete
1988712 February 198820 November 19881 daysComplete
1987122 January 19874 October 19872 daysComplete
19861114 March 198619 December 19862 daysComplete
198573 May 19855 November 19852 daysComplete
1984164 February 19842 October 19842 daysComplete
19831515 January 198313 December 19831 daysComplete
1982121 January 198213 November 19822 daysComplete
1981724 February 198115 December 19812 daysComplete
1980614 March 198018 November 19801 daysComplete
1979132 January 19793 November 19791 daysComplete
197889 January 19789 December 19781 daysComplete
1977147 January 197721 December 19772 daysComplete
1976728 January 19767 December 19762 daysComplete
1975137 January 197526 December 19752 daysComplete
1974919 February 19742 December 19741 daysComplete
19731029 January 197317 December 19732 daysComplete
1972143 February 19726 December 19721 daysComplete
197178 February 197129 November 19711 daysComplete
197093 February 197017 December 19702 daysComplete
1969149 February 196927 December 19692 daysComplete
19681225 January 196828 December 19682 daysComplete
19671327 January 196728 December 19672 daysComplete
1966823 January 19666 November 19661 daysComplete
1965424 January 196513 September 19651 daysComplete
19641020 January 196427 December 19641 daysComplete
1963712 February 196329 November 19632 daysComplete
1962116 January 19626 December 19623 daysComplete
1961151 January 19613 October 19611 daysComplete
19601519 February 196021 December 19601 daysComplete
1959132 January 195928 December 19592 daysComplete
1958197 January 19584 December 19582 daysComplete
195745 April 195726 December 19571 daysComplete
1956109 January 195614 December 19561 daysComplete
19551611 February 19555 November 19552 daysComplete
19541517 April 195418 December 19542 daysComplete
1953203 January 195314 December 19532 daysComplete
1952105 January 195211 December 19521 daysComplete
19511220 March 195118 December 19511 daysComplete
1950815 February 19508 December 19501 daysComplete
194931 September 19494 November 19491 daysComplete
1948521 January 194820 November 19481 daysComplete
1947102 March 194726 December 19471 daysComplete
19461021 January 194621 December 19462 daysComplete
1945108 February 194529 December 19452 daysComplete
1944116 January 194430 November 19442 daysComplete
1943328 January 194327 October 19431 daysComplete
19421219 January 194230 December 19421 daysComplete
1941925 January 194114 December 19411 daysComplete
19401014 February 194016 December 19401 daysComplete
1939530 January 19395 November 19391 daysComplete
1938131 January 193819 November 19383 daysComplete
19371215 March 19376 December 19372 daysComplete
1936173 January 193620 December 19362 daysComplete
Decade averages for Days with 25 mm (0.98 in) or more of precipitation in Boston
DecadeAverage days per yearYears counted
1930s11.84
1940s8.310
1950s12.710
1960s10.910
1970s10.410
1980s10.210
1990s9.810
2000s9.810
2010s11.510
2020s10.26

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 25 mm (0.98 in) or more of precipitation in Boston, 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).