New London Threshold Days by Year (USC00475932)

18 fixed thresholds counted per year at New London (USC00475932): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for New London Thresholds

New London: days with a maximum temperature at or above 30 C (86 F) in 119 years, most in 1933 with 66.
New London: days with a maximum temperature at or below 0 C (32 F) in 119 years, most in 1996 with 95.
New London: days with a maximum temperature at or above 90 F (32.2 C) in 117 years, most in 1937 with 44.
New London: nights with a minimum temperature at or below 0 C (32 F) in 116 years, most in 2018 with 188.
18 fixed thresholds have at least one qualifying day at New London.

Days at or above 30 C (86 F)

119 years with a qualifying day

Days per year at New London with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 1933.

Days at or above 30 C (86 F) per year at New London
Year	Days	Decade average
1897	21	23.3
1898	27	23.3
1899	22	23.3
1900	38	25
1904	15	25
1905	14	25
1906	25	25
1907	12	25
1908	35	25
1909	36	25
1910	53	25.8
1911	38	25.8
1912	19	25.8
1913	26	25.8
1914	22	25.8
1915	7	25.8
1916	31	25.8
1917	13	25.8
1918	19	25.8
1919	30	25.8
1920	17	26.3
1921	52	26.3
1922	18	26.3
1923	26	26.3
1924	8	26.3
1925	35	26.3
1926	25	26.3
1927	26	26.3
1928	24	26.3
1929	32	26.3
1930	55	52.3
1931	57	52.3
1932	46	52.3
1933	66	52.3
1934	51	52.3
1935	38	52.3
1936	59	52.3
1937	57	52.3
1938	35	52.3
1939	59	52.3
1940	32	36.2
1941	47	36.2
1942	15	36.2
1943	41	36.2
1944	42	36.2
1945	21	36.2
1946	20	36.2
1947	50	36.2
1948	46	36.2
1949	48	36.2
1950	20	24.2
1951	7	24.2
1952	29	24.2
1953	23	24.2
1954	20	24.2
1955	46	24.2
1956	17	24.2
1957	25	24.2
1958	23	24.2
1959	32	24.2
1960	21	29
1961	30	29
1962	25	29
1963	35	29
1964	39	29
1965	18	29
1966	44	29
1967	20	29
1968	28	29
1969	30	29
1970	53	36
1971	34	36
1972	36	36
1973	35	36
1974	25	36
1975	40	36
1976	59	36
1977	36	36
1978	26	36
1979	16	36
1980	26	24.1
1981	20	24.1
1982	19	24.1
1983	49	24.1
1984	13	24.1
1985	14	24.1
1986	15	24.1
1987	37	24.1
1994	11	16
1995	27	16
1996	9	16
1997	12	16
1998	15	16
1999	22	16
2000	4	17.8
2001	31	17.8
2002	23	17.8
2003	12	17.8
2004	3	17.8
2005	33	17.8
2006	24	17.8
2007	34	17.8
2008	7	17.8
2009	7	17.8
2010	12	18.2
2011	17	18.2
2012	37	18.2
2013	17	18.2
2014	4	18.2
2015	12	18.2
2016	26	18.2
2017	12	18.2
2018	31	18.2
2019	14	18.2
2020	31	22.8
2021	21	22.8
2022	15	22.8
2023	29	22.8
2024	18	22.8

For each year, a bar from the first to the last day at New London meeting 30 C (86 F).

First to last qualifying date each year at New London
Year	First date	Last date
1897	1897-05-18	1897-09-09
1898	1898-06-03	1898-09-29
1899	1899-06-04	1899-09-16
1900	1900-05-12	1900-09-13
1904	1904-06-18	1904-09-17
1905	1905-06-14	1905-09-28
1906	1906-05-17	1906-09-11
1907	1907-06-14	1907-08-11
1908	1908-06-06	1908-09-26
1909	1909-06-04	1909-08-26
1910	1910-06-13	1910-08-24
1911	1911-05-17	1911-09-16
1912	1912-06-23	1912-09-09
1913	1913-06-12	1913-09-08
1914	1914-05-26	1914-09-20
1915	1915-04-24	1915-09-04
1916	1916-07-01	1916-08-21
1917	1917-05-17	1917-08-19
1918	1918-05-03	1918-08-25
1919	1919-05-27	1919-09-08
1920	1920-05-31	1920-09-25
1921	1921-05-20	1921-09-02
1922	1922-05-10	1922-09-07
1923	1923-06-01	1923-08-11
1924	1924-07-15	1924-09-21
1925	1925-04-23	1925-09-19
1926	1926-05-06	1926-09-17
1927	1927-06-08	1927-09-17
1928	1928-05-09	1928-08-27
1929	1929-05-28	1929-09-24
1930	1930-05-05	1930-09-24
1931	1931-05-15	1931-09-20
1932	1932-05-14	1932-09-11
1933	1933-05-19	1933-09-23
1934	1934-05-03	1934-09-25
1935	1935-06-14	1935-09-24
1936	1936-05-07	1936-09-22
1937	1937-05-30	1937-09-23
1938	1938-05-03	1938-10-10
1939	1939-05-19	1939-09-16
1940	1940-06-01	1940-09-20
1941	1941-05-05	1941-09-21
1942	1942-06-10	1942-08-31
1943	1943-06-03	1943-08-23
1944	1944-05-28	1944-08-15
1945	1945-06-22	1945-09-07
1946	1946-06-16	1946-08-17
1947	1947-06-27	1947-10-21
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-08-27
1950	1950-05-23	1950-08-16
1951	1951-07-15	1951-08-28
1952	1952-05-01	1952-09-28
1953	1953-06-12	1953-09-03
1954	1954-06-09	1954-09-06
1955	1955-06-30	1955-09-18
1956	1956-05-22	1956-08-15
1957	1957-06-16	1957-09-02
1958	1958-06-29	1958-08-30
1959	1959-05-02	1959-09-09
1960	1960-06-27	1960-09-08
1961	1961-05-13	1961-09-11
1962	1962-04-26	1962-08-30
1963	1963-06-02	1963-10-06
1964	1964-05-18	1964-09-07
1965	1965-05-07	1965-08-15
1966	1966-05-26	1966-09-02
1967	1967-05-18	1967-08-26
1968	1968-06-05	1968-09-04
1969	1969-05-27	1969-08-31
1970	1970-04-29	1970-09-08
1971	1971-06-04	1971-10-02
1972	1972-05-17	1972-08-31
1973	1973-06-01	1973-09-02
1974	1974-05-21	1974-08-22
1975	1975-05-19	1975-08-17
1976	1976-06-06	1976-10-01
1977	1977-05-13	1977-08-31
1978	1978-05-26	1978-09-11
1979	1979-05-10	1979-09-06
1980	1980-04-22	1980-08-20
1981	1981-06-05	1981-09-11
1982	1982-05-14	1982-09-12
1983	1983-06-12	1983-09-10
1984	1984-06-06	1984-08-30
1985	1985-04-20	1985-09-19
1986	1986-05-29	1986-08-16
1987	1987-04-18	1987-09-27
1994	1994-06-15	1994-09-16
1995	1995-06-18	1995-09-06
1996	1996-05-19	1996-09-06
1997	1997-06-23	1997-08-03
1998	1998-05-18	1998-09-14
1999	1999-06-06	1999-09-05
2000	2000-06-09	2000-09-01
2001	2001-05-16	2001-08-10
2002	2002-04-16	2002-09-10
2003	2003-04-16	2003-09-07
2004	2004-06-08	2004-07-21
2005	2005-06-08	2005-09-22
2006	2006-05-29	2006-08-05
2007	2007-04-30	2007-10-07
2008	2008-07-08	2008-09-03
2009	2009-06-21	2009-08-15
2010	2010-05-24	2010-08-31
2011	2011-06-07	2011-09-02
2012	2012-05-20	2012-09-05
2013	2013-05-01	2013-09-11
2014	2014-05-31	2014-08-23
2015	2015-07-18	2015-09-07
2016	2016-05-07	2016-09-07
2017	2017-06-05	2017-09-26
2018	2018-05-25	2018-09-18
2019	2019-06-01	2019-08-08
2020	2020-05-26	2020-08-27
2021	2021-06-05	2021-08-20
2022	2022-05-11	2022-09-02
2023	2023-04-13	2023-10-03
2024	2024-06-17	2024-09-20

Every Fixed Threshold

Fixed thresholds at New London
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	119	66	1933	18
35 C (95 F): Days	73	21	1931	2
40 C (104 F): Days	4	6	1936	1
90 F (32.2 C): Days	117	44	1937	3
100 F (37.8 C): Days	19	10	1931	2
0 C (32 F): Ice days (max	119	95	1996	42
0 C (32 F): Frost days (min	116	188	2018	139
-10 C (14 F): Days with min	116	92	2014	27
-20 C (-4 F): Days with min	116	42	2014	6
-30 C (-22 F): Days with min	50	12	1899	3
20 C (68 F): Tropical nights (min	112	24	1921	6
25 C (77 F): Days with min	8	2	1995	1
10 mm (0.39 in): Days with 10 mm or more rain	114	40	1919	23
25 mm (0.98 in): Days with 25 mm or more rain	114	16	2024	6
50 mm (1.97 in): Days with 50 mm or more rain	64	4	1942	2
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1914	1
10 cm (3.9 in): Days with 10 cm or more snowfall	84	12	2019	2
25 cm (9.8 in): Days with 25 cm or more snowfall	19	2	1920	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.

Download the Data

Data for New London 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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

New London Threshold Days by Year (USC00475932)

Key Facts for New London Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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