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Built 2026-10-19 (19 October 2026)

Days with 50 cm (19.7 in) or more of snowfall in Boston

Boston has had days with 50 cm (19.7 in) or more of snowfall in 5 years, most in 1978 with 1. Days per year, season span, streaks and every date.

Key Facts for Boston

  • Boston has had days with 50 cm (19.7 in) or more of snowfall in 5 years, 5 days in all.
  • The most in one year was 1 days in 1978.
  • In 2022, the latest year on file, there were 1 such days.
  • The earliest first date in a year was 20 January 1978.
  • The latest last date in a year was 1 April 1997.
  • 1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

5 years, 5 days
Days with 50 cm (19.7 in) or more of snowfall per year in Boston Days per year in Boston with 50 cm (19.7 in) or more of snowfall. The line is the decade average. The most was 1 in 1978. Grey bars are years with under 90 percent of days observed, left out of rankings. 001111978: 11997: 12003: 12015: 12022: 11978
Days per year in Boston with 50 cm (19.7 in) or more of snowfall. The line is the decade average. The most was 1 in 1978. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 50 cm (19.7 in) or more of snowfall per year in Boston
YearDaysDecade average
197811
199711
200311
201511
202211

Season Span

earliest 20 January, latest 1 April
First to last qualifying date each year in Boston For each year, a bar from the first to the last day in Boston meeting 50 cm (19.7 in). Long bars mean a long season. 1978: 20 January 1978 to 20 January 19781997: 1 April 1997 to 1 April 19972003: 17 February 2003 to 17 February 20032015: 27 January 2015 to 27 January 20152022: 29 January 2022 to 29 January 202219781997200320152022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Boston meeting 50 cm (19.7 in). Long bars mean a long season.
First to last qualifying date each year in Boston
YearFirst dateLast date
19781978-01-201978-01-20
19971997-04-011997-04-01
20032003-02-172003-02-17
20152015-01-272015-01-27
20222022-01-292022-01-29

Every Year

Days with 50 cm (19.7 in) or more of snowfall per year in Boston
YearDaysFirst dateLast dateLongest streak in yearCoverage
2022129 January 202229 January 20221 daysComplete
2015127 January 201527 January 20151 daysComplete
2003117 February 200317 February 20031 daysComplete
199711 April 19971 April 19971 daysComplete
1978120 January 197820 January 19781 daysComplete
Decade averages for Days with 50 cm (19.7 in) or more of snowfall in Boston
DecadeAverage days per yearYears counted
1970s1.01
1990s1.01
2000s1.01
2010s1.01
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 50 cm (19.7 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).