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Built 2026-10-14 (14 October 2026)

Boston Weather Records and Extremes

Record highs and lows for Boston, threaded from 1 station; the hottest day was 39.4 C (102.9 F) on 22 July 2011, with the station behind every year.

Key Facts for Boston

  • The highest maximum temperature on record in Boston is 39.4 C (102.9 F), set on 22 July 2011.
  • The lowest minimum temperature on record in Boston is -25.6 C (-14.1 F), set on 15 February 1943.
  • The lowest maximum temperature on record in Boston is -14.4 C (6.1 F), set on 15 February 1943.
  • The highest minimum temperature on record in Boston is 28.3 C (82.9 F), set on 2 August 1975.
  • The Boston record is threaded from 1 station and runs from 1936 to 2026, 91 years.
  • 1,464 daily records at Boston still stand.
  • 1979 holds the most standing records at Boston: 34.

Stations Behind the Boston Record

91 years of record
Stations threaded into the Boston record
StationFromToNotes
Boston19362026Boston Logan International Airport.

Caveats

    All-Time Extremes

    All-time temperature extremes at Boston
    ExtremeValueDateStation
    Highest maximum39.4 C (102.9 F)22 July 2011Boston
    Lowest maximum-14.4 C (6.1 F)15 February 1943Boston
    Highest minimum28.3 C (82.9 F)2 August 1975Boston
    Lowest minimum-25.6 C (-14.1 F)15 February 1943Boston

    Daily Record Envelope and 2026

    6 days at or beyond a record
    Daily record high and record low at Boston, with 2026 drawn through them The band shows the record high and record low for each calendar day at Boston. The lines show the 2026 daily maximum and minimum. 6 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
    The band shows the record high and record low for each calendar day at Boston. The lines show the 2026 daily maximum and minimum. 6 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
    Daily record high and record low at Boston, with 2026 drawn through them
    MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
    Jan23.3 C (73.9 F)-24.4 C (-11.9 F)11.7 C (53.1 F)-15.0 C (5.0 F)
    Feb22.8 C (73.0 F)-25.6 C (-14.1 F)9.4 C (48.9 F)-15.6 C (3.9 F)
    Mar31.7 C (89.1 F)-17.2 C (1.0 F)23.9 C (75.0 F)-11.1 C (12.0 F)
    Apr34.4 C (93.9 F)-8.9 C (16.0 F)25.6 C (78.1 F)-1.7 C (28.9 F)
    May35.6 C (96.1 F)1.1 C (34.0 F)35.6 C (96.1 F)5.6 C (42.1 F)
    Jun38.9 C (102.0 F)5.0 C (41.0 F)32.8 C (91.0 F)9.4 C (48.9 F)
    Jul39.4 C (102.9 F)10.0 C (50.0 F)38.3 C (100.9 F)15.0 C (59.0 F)
    Aug38.9 C (102.0 F)7.8 C (46.0 F)34.4 C (93.9 F)16.7 C (62.1 F)
    Sep37.8 C (100.0 F)2.8 C (37.0 F)30.6 C (87.1 F)9.4 C (48.9 F)
    Oct32.2 C (90.0 F)-3.9 C (25.0 F)30.6 C (87.1 F)6.1 C (43.0 F)
    Nov28.3 C (82.9 F)-11.1 C (12.0 F)n/an/a
    Dec24.4 C (75.9 F)-23.9 C (-11.0 F)n/an/a

    Which Years Hold Standing Records

    1,464 standing records
    Standing records at Boston by the year they were set 1,464 records at Boston still stand. 1979 holds the most, with 34. 0102030401936: 291937: 171938: 231939: 131940: 291941: 141942: 201943: 261944: 141945: 311946: 321947: 271948: 231949: 231950: 181951: 161952: 111953: 171954: 191955: 151956: 191957: 201958: 71959: 211960: 71961: 151962: 191963: 271964: 261965: 221966: 51967: 261968: 131969: 81970: 111971: 71972: 71973: 91974: 241975: 111976: 191977: 141978: 61979: 341980: 91981: 211982: 171983: 141984: 261985: 111986: 191987: 151988: 161989: 161990: 231991: 221992: 181993: 151994: 121995: 181996: 101997: 41998: 111999: 72000: 192001: 152002: 172003: 82004: 92005: 122006: 92007: 192008: 62009: 112010: 132011: 112012: 212013: 82014: 102015: 142016: 162017: 262018: 242019: 132020: 182021: 162022: 192023: 122024: 52025: 82026: 71936194619561966197619861996200620162026
    1,464 records at Boston still stand. 1979 holds the most, with 34.
    Standing records at Boston by the year they were set
    Year setStanding records
    193629
    193717
    193823
    193913
    194029
    194114
    194220
    194326
    194414
    194531
    194632
    194727
    194823
    194923
    195018
    195116
    195211
    195317
    195419
    195515
    195619
    195720
    19587
    195921
    19607
    196115
    196219
    196327
    196426
    196522
    19665
    196726
    196813
    19698
    197011
    19717
    19727
    19739
    197424
    197511
    197619
    197714
    19786
    197934
    19809
    198121
    198217
    198314
    198426
    198511
    198619
    198715
    198816
    198916
    199023
    199122
    199218
    199315
    199412
    199518
    199610
    19974
    199811
    19997
    200019
    200115
    200217
    20038
    20049
    200512
    20069
    200719
    20086
    200911
    201013
    201111
    201221
    20138
    201410
    201514
    201616
    201726
    201824
    201913
    202018
    202116
    202219
    202312
    20245
    20258
    20267

    All-Time Record Progression

    10 new records
    When Boston set new all-time records 10 all-time records were set at Boston between 2 August 1975 and 22 July 2011. Each dot is a new record. Record high maximum temperatureRecord high minimum temperatureRecord daily snowfallRecord snow depth2 August 1975: Record high maximum temperature 38.9 C (102.0 F)2 August 1975: Record high minimum temperature 28.3 C (82.9 F)20 January 1978: Record daily snowfall 53.3 cm (21.0 in)21 January 1978: Record snow depth 66.0 cm (26.0 in)8 February 1978: Record snow depth 73.7 cm (29.0 in)9 January 1996: Record snow depth 76.2 cm (30.0 in)11 January 1996: Record snow depth 78.7 cm (31.0 in)1 April 1997: Record daily snowfall 56.9 cm (22.4 in)17 February 2003: Record daily snowfall 59.9 cm (23.6 in)22 July 2011: Record high maximum temperature 39.4 C (102.9 F)19751980198519901995200020052010
    10 all-time records were set at Boston between 2 August 1975 and 22 July 2011. Each dot is a new record.
    When Boston set new all-time records
    DateKindDetail
    1975-08-02Record high maximum temperatureRecord high maximum temperature 38.9 C (102.0 F)
    1975-08-02Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)
    1978-01-20Record daily snowfallRecord daily snowfall 53.3 cm (21.0 in)
    1978-01-21Record snow depthRecord snow depth 66.0 cm (26.0 in)
    1978-02-08Record snow depthRecord snow depth 73.7 cm (29.0 in)
    1996-01-09Record snow depthRecord snow depth 76.2 cm (30.0 in)
    1996-01-11Record snow depthRecord snow depth 78.7 cm (31.0 in)
    1997-04-01Record daily snowfallRecord daily snowfall 56.9 cm (22.4 in)
    2003-02-17Record daily snowfallRecord daily snowfall 59.9 cm (23.6 in)
    2011-07-22Record high maximum temperatureRecord high maximum temperature 39.4 C (102.9 F)

    Wettest Day of Each Month

    Aug: 179.3 mm (7.1 in)
    Record daily precipitation for each month at Boston The wettest day on record for each calendar month at Boston. The most was 179.3 mm (7.1 in) on 19 August 1955. 050100150200 Jan: 64.0 mm (2.5 in), 21 January 1979 Jan Feb: 67.6 mm (2.7 in), 13 February 2008 Feb Mar: 88.6 mm (3.5 in), 18 March 1968 Mar Apr: 109.0 mm (4.3 in), 1 April 2004 Apr May: 113.5 mm (4.5 in), 16 May 1954 May Jun: 144.5 mm (5.7 in), 13 June 1998 Jun Jul: 85.3 mm (3.4 in), 13 July 1996 Jul Aug: 179.3 mm (7.1 in), 19 August 1955 Aug Sep: 143.0 mm (5.6 in), 11 September 1954 Sep Oct: 155.2 mm (6.1 in), 20 October 1996 Oct Nov: 84.1 mm (3.3 in), 23 November 1992 Nov Dec: 106.9 mm (4.2 in), 12 December 1992 Dec
    The wettest day on record for each calendar month at Boston. The most was 179.3 mm (7.1 in) on 19 August 1955.
    Record daily precipitation for each month at Boston
    MonthRecord daily precipitation (mm)Date
    Jan64.0 mm (2.5 in)21 January 1979
    Feb67.6 mm (2.7 in)13 February 2008
    Mar88.6 mm (3.5 in)18 March 1968
    Apr109.0 mm (4.3 in)1 April 2004
    May113.5 mm (4.5 in)16 May 1954
    Jun144.5 mm (5.7 in)13 June 1998
    Jul85.3 mm (3.4 in)13 July 1996
    Aug179.3 mm (7.1 in)19 August 1955
    Sep143.0 mm (5.6 in)11 September 1954
    Oct155.2 mm (6.1 in)20 October 1996
    Nov84.1 mm (3.3 in)23 November 1992
    Dec106.9 mm (4.2 in)12 December 1992

    Period of Record Coverage

    1936 to 2026
    Days with data per year at Boston 91 years of record at Boston, 1936 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026. 1936: 365 of 366 days1937: 365 of 365 days1938: 364 of 365 days1939: 363 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 364 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 282 of 365 days195019651980199520102025
    91 years of record at Boston, 1936 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026.
    Days with data per year at Boston
    YearDays with dataShare of yearComplete
    1936365100%Yes
    1937365100%Yes
    1938364100%Yes
    193936399%Yes
    1940366100%Yes
    1941365100%Yes
    1942365100%Yes
    1943364100%Yes
    1944366100%Yes
    1945365100%Yes
    1946365100%Yes
    1947365100%Yes
    1948366100%Yes
    1949365100%Yes
    1950365100%Yes
    1951365100%Yes
    1952366100%Yes
    1953365100%Yes
    1954365100%Yes
    1955365100%Yes
    1956366100%Yes
    1957365100%Yes
    1958365100%Yes
    1959365100%Yes
    1960366100%Yes
    1961365100%Yes
    1962365100%Yes
    1963365100%Yes
    1964366100%Yes
    1965365100%Yes
    1966365100%Yes
    1967365100%Yes
    1968366100%Yes
    1969365100%Yes
    1970365100%Yes
    1971365100%Yes
    1972366100%Yes
    1973365100%Yes
    1974365100%Yes
    1975365100%Yes
    1976366100%Yes
    1977365100%Yes
    1978365100%Yes
    1979365100%Yes
    1980366100%Yes
    1981365100%Yes
    1982365100%Yes
    1983365100%Yes
    1984366100%Yes
    1985365100%Yes
    1986365100%Yes
    1987365100%Yes
    1988366100%Yes
    1989365100%Yes
    1990365100%Yes
    1991365100%Yes
    1992366100%Yes
    1993365100%Yes
    1994365100%Yes
    1995365100%Yes
    1996366100%Yes
    1997365100%Yes
    1998365100%Yes
    1999365100%Yes
    2000366100%Yes
    2001365100%Yes
    2002365100%Yes
    2003365100%Yes
    2004366100%Yes
    2005365100%Yes
    2006365100%Yes
    2007365100%Yes
    2008366100%Yes
    2009365100%Yes
    2010365100%Yes
    2011365100%Yes
    2012366100%Yes
    2013365100%Yes
    2014365100%Yes
    2015365100%Yes
    2016366100%Yes
    2017365100%Yes
    2018365100%Yes
    2019365100%Yes
    2020366100%Yes
    2021365100%Yes
    2022365100%Yes
    2023365100%Yes
    2024366100%Yes
    2025365100%Yes
    202628277%No

    Latest Records

    Latest records at Boston
    DateStationRecordValueBeat old record byOld record stoodSignificance
    10 September 2026Boston, USdaily high min (Tie, Provisional)21.7 C (71.1 F)tie24 years4 of 100 (Routine)
    29 July 2026Boston, USdaily low max (Tie)20.6 C (69.1 F)tie75 years7 of 100 (Routine)
    7 July 2026Boston, USdaily rain39.9 mm (1.6 in)10.4 mm (0.4 in)41 years29 of 100 (Routine)
    3 July 2026Boston, USdaily high min27.8 C (82.0 F)1.1 C (2.0 F)24 years20 of 100 (Routine)
    3 July 2026Boston, USdaily high max37.8 C (100.0 F)1.1 C (2.0 F)8 years13 of 100 (Routine)
    2 July 2026Boston, USdaily high max38.3 C (100.9 F)1.6 C (2.9 F)63 years30 of 100 (Routine)
    2 July 2026Boston, USdaily high min25.6 C (78.1 F)1.2 C (2.2 F)24 years20 of 100 (Routine)
    4 June 2026Boston, USdaily high max (Tie)31.7 C (89.1 F)tie5 years2 of 100 (Routine)
    20 May 2026Boston, USdaily high max (Tie)32.8 C (91.0 F)tie29 years4 of 100 (Routine)
    19 May 2026Boston, USdaily high min20.0 C (68.0 F)2.2 C (4.0 F)76 years38 of 100 (Notable)
    19 May 2026Boston, USmonthly high max (Tie)35.6 C (96.1 F)tie81 years10 of 100 (Routine)
    14 April 2026Boston, USdaily high min (Tie)13.9 C (57.0 F)tie12 years3 of 100 (Routine)
    10 March 2026Boston, USdaily high max23.9 C (75.0 F)2.8 C (5.0 F)48 years28 of 100 (Routine)
    23 February 2026Boston, USdaily snowfall43.4 cm (17.1 in)29.4 cm (11.6 in)32 years55 of 100 (Notable)
    30 January 2026Boston, USdaily low max (Tie)-8.3 C (17.1 F)tie78 years8 of 100 (Routine)
    26 January 2026Boston, USdaily snowfall (Tie)16.5 cm (6.5 in)tie76 years8 of 100 (Routine)
    25 January 2026Boston, USdaily snowfall42.4 cm (16.7 in)20.8 cm (8.2 in)84 years62 of 100 (Major)
    5 December 2025Boston, USdaily low min-11.1 C (12.0 F)1.1 C (2.0 F)36 years21 of 100 (Routine)
    13 October 2025Boston, USdaily rain42.4 mm (1.7 in)4.3 mm (0.17 in)4 years13 of 100 (Routine)
    28 September 2025Boston, USdaily high min (Tie)18.3 C (64.9 F)tie66 years7 of 100 (Routine)

    Threshold Days in Boston

    How many days a year reach a given temperature or amount of rain. The combined page lists every threshold.

    Download the Data

    • Data for Boston standing records by year: CSV or JSON. Field meanings are on the data page.
    • Data for Boston threshold days 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 2026-10-12 (12 October 2026). The city record threads stations by a curated mapping and is not official.

    Data as of . Last revised (2026-10-12).