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Built 2026-10-19 (19 October 2026)

Days with 25 cm (9.8 in) or more of snowfall in Boston

Boston has had days with 25 cm (9.8 in) or more of snowfall in 40 years, most in 2015 with 4. Days per year, season span, streaks and every date.

Key Facts for Boston

  • Boston has had days with 25 cm (9.8 in) or more of snowfall in 40 years, 56 days in all.
  • The most in one year was 4 days in 2015.
  • In 2026, the latest year on file, there were 2 such days.
  • The earliest first date in a year was 2 January 2014.
  • The latest last date in a year was 29 December 1976.
  • The longest run inside a single year was 2 days in 2013.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

40 years, 56 days
Days with 25 cm (9.8 in) or more of snowfall per year in Boston Days per year in Boston with 25 cm (9.8 in) or more of snowfall. The line is the decade average. The most was 4 in 2015. Grey bars are years with under 90 percent of days observed, left out of rankings. 012341936: 11938: 11940: 11943: 11944: 11945: 21956: 11958: 11960: 21961: 21967: 11969: 11974: 11975: 11976: 11977: 11978: 21981: 11982: 11983: 11993: 11994: 11996: 21997: 12003: 32005: 12006: 12007: 12009: 12010: 12011: 12013: 32014: 22015: 42017: 12018: 22019: 12020: 12022: 22026: 21936196719932011
Days per year in Boston with 25 cm (9.8 in) or more of snowfall. The line is the decade average. The most was 4 in 2015. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 25 cm (9.8 in) or more of snowfall per year in Boston
YearDaysDecade average
193611
193811
194011.3
194311.3
194411.3
194521.3
195611
195811
196021.5
196121.5
196711.5
196911.5
197411.2
197511.2
197611.2
197711.2
197821.2
198111
198211
198311
199311.3
199411.3
199621.3
199711.3
200331.4
200511.4
200611.4
200711.4
200911.4
201011.9
201111.9
201331.9
201421.9
201541.9
201711.9
201821.9
201911.9
202011.7
202221.7
202621.7

Season Span

earliest 2 January, latest 29 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 cm (9.8 in). Long bars mean a long season. 1936: 19 January 1936 to 19 January 19361938: 13 January 1938 to 13 January 19381940: 15 February 1940 to 15 February 19401943: 28 January 1943 to 28 January 19431944: 20 March 1944 to 20 March 19441945: 8 February 1945 to 19 December 19451956: 19 March 1956 to 19 March 19561958: 16 February 1958 to 16 February 19581960: 4 March 1960 to 12 December 19601961: 20 January 1961 to 4 February 19611967: 7 March 1967 to 7 March 19671969: 24 February 1969 to 24 February 19691974: 2 February 1974 to 2 February 19741975: 21 December 1975 to 21 December 19751976: 29 December 1976 to 29 December 19761977: 7 January 1977 to 7 January 19771978: 20 January 1978 to 7 February 19781981: 6 December 1981 to 6 December 19811982: 6 April 1982 to 6 April 19821983: 12 February 1983 to 12 February 19831993: 13 March 1993 to 13 March 19931994: 9 February 1994 to 9 February 19941996: 3 January 1996 to 8 January 19961997: 1 April 1997 to 1 April 19972003: 7 February 2003 to 6 December 20032005: 23 January 2005 to 23 January 20052006: 12 February 2006 to 12 February 20062007: 13 December 2007 to 13 December 20072009: 20 December 2009 to 20 December 20092010: 26 December 2010 to 26 December 20102011: 12 January 2011 to 12 January 20112013: 8 February 2013 to 8 March 20132014: 2 January 2014 to 5 February 20142015: 27 January 2015 to 15 February 20152017: 9 February 2017 to 9 February 20172018: 4 January 2018 to 13 March 20182019: 4 March 2019 to 4 March 20192020: 17 December 2020 to 17 December 20202022: 7 January 2022 to 29 January 20222026: 25 January 2026 to 23 February 202619361945196719771993200520112018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Boston meeting 25 cm (9.8 in). Long bars mean a long season.
First to last qualifying date each year in Boston
YearFirst dateLast date
19361936-01-191936-01-19
19381938-01-131938-01-13
19401940-02-151940-02-15
19431943-01-281943-01-28
19441944-03-201944-03-20
19451945-02-081945-12-19
19561956-03-191956-03-19
19581958-02-161958-02-16
19601960-03-041960-12-12
19611961-01-201961-02-04
19671967-03-071967-03-07
19691969-02-241969-02-24
19741974-02-021974-02-02
19751975-12-211975-12-21
19761976-12-291976-12-29
19771977-01-071977-01-07
19781978-01-201978-02-07
19811981-12-061981-12-06
19821982-04-061982-04-06
19831983-02-121983-02-12
19931993-03-131993-03-13
19941994-02-091994-02-09
19961996-01-031996-01-08
19971997-04-011997-04-01
20032003-02-072003-12-06
20052005-01-232005-01-23
20062006-02-122006-02-12
20072007-12-132007-12-13
20092009-12-202009-12-20
20102010-12-262010-12-26
20112011-01-122011-01-12
20132013-02-082013-03-08
20142014-01-022014-02-05
20152015-01-272015-02-15
20172017-02-092017-02-09
20182018-01-042018-03-13
20192019-03-042019-03-04
20202020-12-172020-12-17
20222022-01-072022-01-29
20262026-01-252026-02-23

Every Year

Days with 25 cm (9.8 in) or more of snowfall per year in Boston
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026225 January 202623 February 20261 daysIncomplete, not ranked
202227 January 202229 January 20221 daysComplete
2020117 December 202017 December 20201 daysComplete
201914 March 20194 March 20191 daysComplete
201824 January 201813 March 20181 daysComplete
201719 February 20179 February 20171 daysComplete
2015427 January 201515 February 20151 daysComplete
201422 January 20145 February 20141 daysComplete
201338 February 20138 March 20132 daysComplete
2011112 January 201112 January 20111 daysComplete
2010126 December 201026 December 20101 daysComplete
2009120 December 200920 December 20091 daysComplete
2007113 December 200713 December 20071 daysComplete
2006112 February 200612 February 20061 daysComplete
2005123 January 200523 January 20051 daysComplete
200337 February 20036 December 20031 daysComplete
199711 April 19971 April 19971 daysComplete
199623 January 19968 January 19961 daysComplete
199419 February 19949 February 19941 daysComplete
1993113 March 199313 March 19931 daysComplete
1983112 February 198312 February 19831 daysComplete
198216 April 19826 April 19821 daysComplete
198116 December 19816 December 19811 daysComplete
1978220 January 19787 February 19781 daysComplete
197717 January 19777 January 19771 daysComplete
1976129 December 197629 December 19761 daysComplete
1975121 December 197521 December 19751 daysComplete
197412 February 19742 February 19741 daysComplete
1969124 February 196924 February 19691 daysComplete
196717 March 19677 March 19671 daysComplete
1961220 January 19614 February 19611 daysComplete
196024 March 196012 December 19601 daysComplete
1958116 February 195816 February 19581 daysComplete
1956119 March 195619 March 19561 daysComplete
194528 February 194519 December 19451 daysComplete
1944120 March 194420 March 19441 daysComplete
1943128 January 194328 January 19431 daysComplete
1940115 February 194015 February 19401 daysComplete
1938113 January 193813 January 19381 daysComplete
1936119 January 193619 January 19361 daysComplete
Decade averages for Days with 25 cm (9.8 in) or more of snowfall in Boston
DecadeAverage days per yearYears counted
1930s1.02
1940s1.34
1950s1.02
1960s1.54
1970s1.25
1980s1.03
1990s1.34
2000s1.45
2010s1.98
2020s1.52

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 cm (9.8 in) or more of snowfall 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).