Nights at or below 0 C (32 F) in Boston

Boston has had nights with a minimum temperature at or below 0 C (32 F) in 91 years, most in 1940 with 120. Days per year, season span, streaks and every date.

Key Facts for Boston

Boston has had nights with a minimum temperature at or below 0 C (32 F) in 91 years, 8,696 days in all.
The most in one year was 120 days in 1940.
In 2026, the latest year on file, there were 70 such days.
The earliest first date in a year was 1 January 1936.
The latest last date in a year was 31 December 1944.
The longest run inside a single year was 85 days in 1970.
1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

91 years, 8,696 days

Days per year in Boston with a minimum temperature at or below 0 C (32 F). The line is the decade average. The most was 120 in 1940. Grey bars are years with under 90 percent of days observed, left out of rankings.

Nights at or below 0 C (32 F) per year in Boston
Year	Days	Decade average
1936	104	106.8
1937	107	106.8
1938	102	106.8
1939	114	106.8
1940	120	103.3
1941	110	103.3
1942	96	103.3
1943	114	103.3
1944	107	103.3
1945	99	103.3
1946	88	103.3
1947	116	103.3
1948	99	103.3
1949	84	103.3
1950	102	91.3
1951	83	91.3
1952	88	91.3
1953	74	91.3
1954	91	91.3
1955	103	91.3
1956	96	91.3
1957	91	91.3
1958	91	91.3
1959	94	91.3
1960	109	102.7
1961	105	102.7
1962	101	102.7
1963	108	102.7
1964	104	102.7
1965	109	102.7
1966	90	102.7
1967	103	102.7
1968	94	102.7
1969	104	102.7
1970	104	96.7
1971	116	96.7
1972	107	96.7
1973	76	96.7
1974	97	96.7
1975	81	96.7
1976	108	96.7
1977	89	96.7
1978	109	96.7
1979	80	96.7
1980	115	100.5
1981	95	100.5
1982	96	100.5
1983	88	100.5
1984	90	100.5
1985	109	100.5
1986	104	100.5
1987	103	100.5
1988	94	100.5
1989	111	100.5
1990	85	90.1
1991	79	90.1
1992	96	90.1
1993	94	90.1
1994	96	90.1
1995	101	90.1
1996	88	90.1
1997	108	90.1
1998	68	90.1
1999	86	90.1
2000	91	95.1
2001	95	95.1
2002	91	95.1
2003	106	95.1
2004	98	95.1
2005	106	95.1
2006	71	95.1
2007	100	95.1
2008	97	95.1
2009	96	95.1
2010	88	91.5
2011	89	91.5
2012	74	91.5
2013	106	91.5
2014	100	91.5
2015	99	91.5
2016	81	91.5
2017	90	91.5
2018	95	91.5
2019	93	91.5
2020	71	79.6
2021	87	79.6
2022	90	79.6
2023	68	79.6
2024	75	79.6
2025	96	79.6
2026	70	79.6

Season Span

earliest 1 January, latest 31 December

For each year, a bar from the first to the last day in Boston meeting 0 C (32 F). Long bars mean a long season.

First to last qualifying date each year in Boston
Year	First date	Last date
1936	1936-01-01	1936-12-29
1937	1937-01-02	1937-12-31
1938	1938-01-01	1938-12-31
1939	1939-01-01	1939-12-31
1940	1940-01-01	1940-12-26
1941	1941-01-01	1941-12-31
1942	1942-01-03	1942-12-31
1943	1943-01-01	1943-12-31
1944	1944-01-01	1944-12-31
1945	1945-01-02	1945-12-30
1946	1946-01-01	1946-12-31
1947	1947-01-01	1947-12-31
1948	1948-01-01	1948-12-29
1949	1949-01-01	1949-12-31
1950	1950-01-01	1950-12-31
1951	1951-01-01	1951-12-29
1952	1952-01-03	1952-12-31
1953	1953-01-01	1953-12-31
1954	1954-01-01	1954-12-28
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1958	1958-01-02	1958-12-31
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-29
1966	1966-01-02	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-02	1973-12-31
1974	1974-01-02	1974-12-31
1975	1975-01-01	1975-12-30
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-03	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-02	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-01	1987-12-31
1988	1988-01-02	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-31
1992	1992-01-01	1992-12-28
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-31
1995	1995-01-02	1995-12-30
1996	1996-01-01	1996-12-31
1997	1997-01-01	1997-12-31
1998	1998-01-01	1998-12-31
1999	1999-01-01	1999-12-31
2000	2000-01-01	2000-12-31
2001	2001-01-01	2001-12-31
2002	2002-01-01	2002-12-31
2003	2003-01-02	2003-12-28
2004	2004-01-02	2004-12-31
2005	2005-01-02	2005-12-31
2006	2006-01-01	2006-12-31
2007	2007-01-10	2007-12-31
2008	2008-01-01	2008-12-31
2009	2009-01-01	2009-12-31
2010	2010-01-01	2010-12-31
2011	2011-01-03	2011-12-30
2012	2012-01-03	2012-12-31
2013	2013-01-01	2013-12-31
2014	2014-01-01	2014-12-31
2015	2015-01-01	2015-12-30
2016	2016-01-02	2016-12-31
2017	2017-01-02	2017-12-31
2018	2018-01-01	2018-12-31
2019	2019-01-02	2019-12-25
2020	2020-01-05	2020-12-30
2021	2021-01-01	2021-12-27
2022	2022-01-03	2022-12-29
2023	2023-01-07	2023-12-23
2024	2024-01-01	2024-12-27
2025	2025-01-03	2025-12-31
2026	2026-01-01	2026-04-09

Every Year

Nights at or below 0 C (32 F) per year in Boston
Year	Days	First date	Last date	Longest streak in year	Coverage
2026	70	1 January 2026	9 April 2026	43 days	Incomplete, not ranked
2025	96	3 January 2025	31 December 2025	53 days	Complete
2024	75	1 January 2024	27 December 2024	11 days	Complete
2023	68	7 January 2023	23 December 2023	8 days	Complete
2022	90	3 January 2022	29 December 2022	16 days	Complete
2021	87	1 January 2021	27 December 2021	36 days	Complete
2020	71	5 January 2020	30 December 2020	10 days	Complete
2019	93	2 January 2019	25 December 2019	14 days	Complete
2018	95	1 January 2018	31 December 2018	13 days	Complete
2017	90	2 January 2017	31 December 2017	22 days	Complete
2016	81	2 January 2016	31 December 2016	12 days	Complete
2015	99	1 January 2015	30 December 2015	50 days	Complete
2014	100	1 January 2014	31 December 2014	33 days	Complete
2013	106	1 January 2013	31 December 2013	14 days	Complete
2012	74	3 January 2012	31 December 2012	19 days	Complete
2011	89	3 January 2011	30 December 2011	34 days	Complete
2010	88	1 January 2010	31 December 2010	22 days	Complete
2009	96	1 January 2009	31 December 2009	28 days	Complete
2008	97	1 January 2008	31 December 2008	40 days	Complete
2007	100	10 January 2007	31 December 2007	32 days	Complete
2006	71	1 January 2006	31 December 2006	20 days	Complete
2005	106	2 January 2005	31 December 2005	25 days	Complete
2004	98	2 January 2004	31 December 2004	36 days	Complete
2003	106	2 January 2003	28 December 2003	31 days	Complete
2002	91	1 January 2002	31 December 2002	11 days	Complete
2001	95	1 January 2001	31 December 2001	16 days	Complete
2000	91	1 January 2000	31 December 2000	51 days	Complete
1999	86	1 January 1999	31 December 1999	11 days	Complete
1998	68	1 January 1998	31 December 1998	20 days	Complete
1997	108	1 January 1997	31 December 1997	14 days	Complete
1996	88	1 January 1996	31 December 1996	14 days	Complete
1995	101	2 January 1995	30 December 1995	24 days	Complete
1994	96	1 January 1994	31 December 1994	14 days	Complete
1993	94	1 January 1993	31 December 1993	58 days	Complete
1992	96	1 January 1992	28 December 1992	16 days	Complete
1991	79	1 January 1991	31 December 1991	10 days	Complete
1990	85	1 January 1990	31 December 1990	9 days	Complete
1989	111	1 January 1989	31 December 1989	37 days	Complete
1988	94	2 January 1988	31 December 1988	16 days	Complete
1987	103	1 January 1987	31 December 1987	25 days	Complete
1986	104	1 January 1986	31 December 1986	24 days	Complete
1985	109	1 January 1985	31 December 1985	29 days	Complete
1984	90	1 January 1984	31 December 1984	53 days	Complete
1983	88	1 January 1983	31 December 1983	20 days	Complete
1982	96	2 January 1982	31 December 1982	32 days	Complete
1981	95	1 January 1981	31 December 1981	15 days	Complete
1980	115	1 January 1980	31 December 1980	48 days	Complete
1979	80	3 January 1979	31 December 1979	22 days	Complete
1978	109	1 January 1978	31 December 1978	44 days	Complete
1977	89	1 January 1977	31 December 1977	11 days	Complete
1976	108	1 January 1976	31 December 1976	58 days	Complete
1975	81	1 January 1975	30 December 1975	20 days	Complete
1974	97	2 January 1974	31 December 1974	20 days	Complete
1973	76	2 January 1973	31 December 1973	15 days	Complete
1972	107	1 January 1972	31 December 1972	20 days	Complete
1971	116	1 January 1971	31 December 1971	13 days	Complete
1970	104	1 January 1970	31 December 1970	85 days	Complete
1969	104	1 January 1969	31 December 1969	29 days	Complete
1968	94	1 January 1968	31 December 1968	35 days	Complete
1967	103	1 January 1967	31 December 1967	28 days	Complete
1966	90	2 January 1966	31 December 1966	17 days	Complete
1965	109	1 January 1965	29 December 1965	29 days	Complete
1964	104	1 January 1964	31 December 1964	23 days	Complete
1963	108	1 January 1963	31 December 1963	45 days	Complete
1962	101	1 January 1962	31 December 1962	24 days	Complete
1961	105	1 January 1961	31 December 1961	26 days	Complete
1960	109	1 January 1960	31 December 1960	31 days	Complete
1959	94	1 January 1959	31 December 1959	15 days	Complete
1958	91	2 January 1958	31 December 1958	25 days	Complete
1957	91	1 January 1957	31 December 1957	18 days	Complete
1956	96	1 January 1956	31 December 1956	23 days	Complete
1955	103	1 January 1955	31 December 1955	38 days	Complete
1954	91	1 January 1954	28 December 1954	16 days	Complete
1953	74	1 January 1953	31 December 1953	13 days	Complete
1952	88	3 January 1952	31 December 1952	27 days	Complete
1951	83	1 January 1951	29 December 1951	12 days	Complete
1950	102	1 January 1950	31 December 1950	38 days	Complete
1949	84	1 January 1949	31 December 1949	15 days	Complete
1948	99	1 January 1948	29 December 1948	21 days	Complete
1947	116	1 January 1947	31 December 1947	62 days	Complete
1946	88	1 January 1946	31 December 1946	32 days	Complete
1945	99	2 January 1945	30 December 1945	52 days	Complete
1944	107	1 January 1944	31 December 1944	23 days	Complete
1943	114	1 January 1943	31 December 1943	23 days	Complete
1942	96	3 January 1942	31 December 1942	36 days	Complete
1941	110	1 January 1941	31 December 1941	26 days	Complete
1940	120	1 January 1940	26 December 1940	23 days	Complete
1939	114	1 January 1939	31 December 1939	23 days	Complete
1938	102	1 January 1938	31 December 1938	18 days	Complete
1937	107	2 January 1937	31 December 1937	17 days	Complete
1936	104	1 January 1936	29 December 1936	36 days	Complete

Decade averages for Nights at or below 0 C (32 F) in Boston
Decade	Average days per year	Years counted
1930s	106.8	4
1940s	103.3	10
1950s	91.3	10
1960s	102.7	10
1970s	96.7	10
1980s	100.5	10
1990s	90.1	10
2000s	95.1	10
2010s	91.5	10
2020s	81.2	6

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 Nights at or below 0 C (32 F) 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).