Days with a maximum at or below 0 C (32 F) in Boston

Boston has had days with a maximum temperature at or below 0 C (32 F) in 91 years, most in 1989 with 44. Days per year, season span, streaks and every date.

Key Facts for Boston

Boston has had days with a maximum temperature at or below 0 C (32 F) in 91 years, 2,304 days in all.
The most in one year was 44 days in 1989.
In 2026, the latest year on file, there were 22 such days.
The earliest first date in a year was 1 January 1940.
The latest last date in a year was 31 December 1956.
The longest run inside a single year was 16 days in 1961.
1 year with under 90 percent of days observed is left out of these rankings.

Days per Year

91 years, 2,304 days

Days per year in Boston with a maximum temperature at or below 0 C (32 F). The line is the decade average. The most was 44 in 1989. Grey bars are years with under 90 percent of days observed, left out of rankings.

Days with a maximum at or below 0 C (32 F) per year in Boston
Year	Days	Decade average
1936	38	28.3
1937	15	28.3
1938	31	28.3
1939	29	28.3
1940	38	30.1
1941	35	30.1
1942	29	30.1
1943	34	30.1
1944	25	30.1
1945	35	30.1
1946	22	30.1
1947	27	30.1
1948	40	30.1
1949	16	30.1
1950	20	22.5
1951	20	22.5
1952	13	22.5
1953	13	22.5
1954	23	22.5
1955	32	22.5
1956	20	22.5
1957	20	22.5
1958	37	22.5
1959	27	22.5
1960	20	29.2
1961	33	29.2
1962	33	29.2
1963	42	29.2
1964	27	29.2
1965	31	29.2
1966	22	29.2
1967	22	29.2
1968	35	29.2
1969	27	29.2
1970	40	27.6
1971	23	27.6
1972	24	27.6
1973	21	27.6
1974	24	27.6
1975	16	27.6
1976	32	27.6
1977	32	27.6
1978	34	27.6
1979	30	27.6
1980	37	28.6
1981	26	28.6
1982	32	28.6
1983	25	28.6
1984	30	28.6
1985	30	28.6
1986	20	28.6
1987	18	28.6
1988	24	28.6
1989	44	28.6
1990	13	21.9
1991	16	21.9
1992	26	21.9
1993	29	21.9
1994	35	21.9
1995	26	21.9
1996	26	21.9
1997	15	21.9
1998	14	21.9
1999	19	21.9
2000	35	25.7
2001	17	25.7
2002	11	25.7
2003	39	25.7
2004	30	25.7
2005	29	25.7
2006	13	25.7
2007	30	25.7
2008	21	25.7
2009	32	25.7
2010	17	22.3
2011	22	22.3
2012	8	22.3
2013	28	22.3
2014	35	22.3
2015	39	22.3
2016	16	22.3
2017	22	22.3
2018	18	22.3
2019	18	22.3
2020	9	16
2021	19	16
2022	21	16
2023	4	16
2024	9	16
2025	28	16
2026	22	16

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	1936-01-19	1936-12-23
1937	1937-01-20	1937-12-31
1938	1938-01-09	1938-12-31
1939	1939-01-03	1939-12-30
1940	1940-01-01	1940-12-14
1941	1941-01-05	1941-12-30
1942	1942-01-06	1942-12-27
1943	1943-01-04	1943-12-29
1944	1944-01-07	1944-12-30
1945	1945-01-03	1945-12-23
1946	1946-01-02	1946-12-31
1947	1947-01-01	1947-12-30
1948	1948-01-07	1948-12-27
1949	1949-01-15	1949-12-30
1950	1950-01-08	1950-12-27
1951	1951-01-08	1951-12-28
1952	1952-01-07	1952-12-28
1953	1953-01-07	1953-12-24
1954	1954-01-08	1954-12-25
1955	1955-01-07	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-13
1958	1958-01-03	1958-12-26
1959	1959-01-05	1959-12-23
1960	1960-01-10	1960-12-28
1961	1961-01-03	1961-12-30
1962	1962-01-02	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-11	1964-12-29
1965	1965-01-01	1965-12-27
1966	1966-01-09	1966-12-31
1967	1967-01-19	1967-12-30
1968	1968-01-01	1968-12-30
1969	1969-01-02	1969-12-25
1970	1970-01-01	1970-12-31
1971	1971-01-07	1971-12-31
1972	1972-01-01	1972-12-29
1973	1973-01-06	1973-12-24
1974	1974-01-05	1974-12-26
1975	1975-01-15	1975-12-25
1976	1976-01-02	1976-12-31
1977	1977-01-01	1977-12-29
1978	1978-01-01	1978-12-11
1979	1979-01-04	1979-12-20
1980	1980-01-03	1980-12-31
1981	1981-01-01	1981-12-21
1982	1982-01-03	1982-12-23
1983	1983-01-04	1983-12-31
1984	1984-01-01	1984-12-27
1985	1985-01-09	1985-12-26
1986	1986-01-07	1986-03-21
1987	1987-01-03	1987-12-30
1988	1988-01-03	1988-12-18
1989	1989-01-04	1989-12-30
1990	1990-01-13	1990-12-27
1991	1991-01-01	1991-12-25
1992	1992-01-11	1992-12-27
1993	1993-01-02	1993-12-31
1994	1994-01-05	1994-12-30
1995	1995-01-05	1995-12-21
1996	1996-01-03	1996-12-31
1997	1997-01-01	1997-03-16
1998	1998-01-01	1998-12-31
1999	1999-01-01	1999-12-28
2000	2000-01-13	2000-12-31
2001	2001-01-02	2001-03-07
2002	2002-01-19	2002-12-30
2003	2003-01-06	2003-12-13
2004	2004-01-07	2004-12-28
2005	2005-01-16	2005-12-21
2006	2006-01-04	2006-03-03
2007	2007-01-17	2007-12-21
2008	2008-01-03	2008-12-31
2009	2009-01-01	2009-12-31
2010	2010-01-02	2010-12-27
2011	2011-01-06	2011-12-24
2012	2012-01-04	2012-12-30
2013	2013-01-02	2013-12-31
2014	2014-01-01	2014-12-31
2015	2015-01-06	2015-03-20
2016	2016-01-05	2016-12-16
2017	2017-01-06	2017-12-31
2018	2018-01-01	2018-12-08
2019	2019-01-07	2019-12-19
2020	2020-01-17	2020-12-19
2021	2021-01-21	2021-12-24
2022	2022-01-04	2022-12-25
2023	2023-02-01	2023-02-27
2024	2024-01-15	2024-12-23
2025	2025-01-04	2025-12-27
2026	2026-01-02	2026-03-02

Every Year

Days with a maximum at or below 0 C (32 F) per year in Boston
Year	Days	First date	Last date	Longest streak in year	Coverage
2026	22	2 January 2026	2 March 2026	9 days	Incomplete, not ranked
2025	28	4 January 2025	27 December 2025	4 days	Complete
2024	9	15 January 2024	23 December 2024	5 days	Complete
2023	4	1 February 2023	27 February 2023	1 days	Complete
2022	21	4 January 2022	25 December 2022	3 days	Complete
2021	19	21 January 2021	24 December 2021	6 days	Complete
2020	9	17 January 2020	19 December 2020	4 days	Complete
2019	18	7 January 2019	19 December 2019	4 days	Complete
2018	18	1 January 2018	8 December 2018	2 days	Complete
2017	22	6 January 2017	31 December 2017	13 days	Complete
2016	16	5 January 2016	16 December 2016	4 days	Complete
2015	39	6 January 2015	20 March 2015	15 days	Complete
2014	35	1 January 2014	31 December 2014	7 days	Complete
2013	28	2 January 2013	31 December 2013	8 days	Complete
2012	8	4 January 2012	30 December 2012	3 days	Complete
2011	22	6 January 2011	24 December 2011	6 days	Complete
2010	17	2 January 2010	27 December 2010	3 days	Complete
2009	32	1 January 2009	31 December 2009	4 days	Complete
2008	21	3 January 2008	31 December 2008	3 days	Complete
2007	30	17 January 2007	21 December 2007	6 days	Complete
2006	13	4 January 2006	3 March 2006	4 days	Complete
2005	29	16 January 2005	21 December 2005	13 days	Complete
2004	30	7 January 2004	28 December 2004	9 days	Complete
2003	39	6 January 2003	13 December 2003	12 days	Complete
2002	11	19 January 2002	30 December 2002	4 days	Complete
2001	17	2 January 2001	7 March 2001	5 days	Complete
2000	35	13 January 2000	31 December 2000	8 days	Complete
1999	19	1 January 1999	28 December 1999	3 days	Complete
1998	14	1 January 1998	31 December 1998	3 days	Complete
1997	15	1 January 1997	16 March 1997	3 days	Complete
1996	26	3 January 1996	31 December 1996	9 days	Complete
1995	26	5 January 1995	21 December 1995	5 days	Complete
1994	35	5 January 1994	30 December 1994	5 days	Complete
1993	29	2 January 1993	31 December 1993	6 days	Complete
1992	26	11 January 1992	27 December 1992	7 days	Complete
1991	16	1 January 1991	25 December 1991	2 days	Complete
1990	13	13 January 1990	27 December 1990	4 days	Complete
1989	44	4 January 1989	30 December 1989	14 days	Complete
1988	24	3 January 1988	18 December 1988	3 days	Complete
1987	18	3 January 1987	30 December 1987	5 days	Complete
1986	20	7 January 1986	21 March 1986	4 days	Complete
1985	30	9 January 1985	26 December 1985	7 days	Complete
1984	30	1 January 1984	27 December 1984	12 days	Complete
1983	25	4 January 1983	31 December 1983	5 days	Complete
1982	32	3 January 1982	23 December 1982	8 days	Complete
1981	26	1 January 1981	21 December 1981	11 days	Complete
1980	37	3 January 1980	31 December 1980	8 days	Complete
1979	30	4 January 1979	20 December 1979	11 days	Complete
1978	34	1 January 1978	11 December 1978	9 days	Complete
1977	32	1 January 1977	29 December 1977	9 days	Complete
1976	32	2 January 1976	31 December 1976	6 days	Complete
1975	16	15 January 1975	25 December 1975	5 days	Complete
1974	24	5 January 1974	26 December 1974	6 days	Complete
1973	21	6 January 1973	24 December 1973	8 days	Complete
1972	24	1 January 1972	29 December 1972	4 days	Complete
1971	23	7 January 1971	31 December 1971	5 days	Complete
1970	40	1 January 1970	31 December 1970	15 days	Complete
1969	27	2 January 1969	25 December 1969	4 days	Complete
1968	35	1 January 1968	30 December 1968	6 days	Complete
1967	22	19 January 1967	30 December 1967	3 days	Complete
1966	22	9 January 1966	31 December 1966	4 days	Complete
1965	31	1 January 1965	27 December 1965	10 days	Complete
1964	27	11 January 1964	29 December 1964	5 days	Complete
1963	42	1 January 1963	31 December 1963	13 days	Complete
1962	33	2 January 1962	31 December 1962	7 days	Complete
1961	33	3 January 1961	30 December 1961	16 days	Complete
1960	20	10 January 1960	28 December 1960	4 days	Complete
1959	27	5 January 1959	23 December 1959	4 days	Complete
1958	37	3 January 1958	26 December 1958	12 days	Complete
1957	20	1 January 1957	13 December 1957	6 days	Complete
1956	20	1 January 1956	31 December 1956	5 days	Complete
1955	32	7 January 1955	31 December 1955	7 days	Complete
1954	23	8 January 1954	25 December 1954	7 days	Complete
1953	13	7 January 1953	24 December 1953	3 days	Complete
1952	13	7 January 1952	28 December 1952	3 days	Complete
1951	20	8 January 1951	28 December 1951	4 days	Complete
1950	20	8 January 1950	27 December 1950	3 days	Complete
1949	16	15 January 1949	30 December 1949	2 days	Complete
1948	40	7 January 1948	27 December 1948	10 days	Complete
1947	27	1 January 1947	30 December 1947	5 days	Complete
1946	22	2 January 1946	31 December 1946	7 days	Complete
1945	35	3 January 1945	23 December 1945	12 days	Complete
1944	25	7 January 1944	30 December 1944	6 days	Complete
1943	34	4 January 1943	29 December 1943	7 days	Complete
1942	29	6 January 1942	27 December 1942	6 days	Complete
1941	35	5 January 1941	30 December 1941	8 days	Complete
1940	38	1 January 1940	14 December 1940	12 days	Complete
1939	29	3 January 1939	30 December 1939	6 days	Complete
1938	31	9 January 1938	31 December 1938	6 days	Complete
1937	15	20 January 1937	31 December 1937	3 days	Complete
1936	38	19 January 1936	23 December 1936	11 days	Complete

Decade averages for Days with a maximum at or below 0 C (32 F) in Boston
Decade	Average days per year	Years counted
1930s	28.3	4
1940s	30.1	10
1950s	22.5	10
1960s	29.2	10
1970s	27.6	10
1980s	28.6	10
1990s	21.9	10
2000s	25.7	10
2010s	22.3	10
2020s	15.0	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 Days with a maximum 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).