New London Threshold Days by Year (USC00215842)

21 fixed thresholds counted per year at New London (USC00215842): 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 105 years, most in 1988 with 66.
New London: days with a maximum temperature at or above 90 F (32.2 C) in 105 years, most in 1988 with 42.
New London: days with a maximum temperature at or below 0 C (32 F) in 105 years, most in 1916 with 112.
New London: nights with a minimum temperature at or below 0 C (32 F) in 105 years, most in 1907 with 203.
21 fixed thresholds have at least one qualifying day at New London.

Days at or above 30 C (86 F)

105 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 1988.

Days at or above 30 C (86 F) per year at New London
Year	Days	Decade average
1895	29	30.3
1897	31	30.3
1899	31	30.3
1901	55	27
1902	32	27
1903	18	27
1904	12	27
1905	22	27
1906	32	27
1907	12	27
1908	28	27
1909	32	27
1910	39	22.6
1911	30	22.6
1912	19	22.6
1913	29	22.6
1914	19	22.6
1915	4	22.6
1916	21	22.6
1917	18	22.6
1918	23	22.6
1919	24	22.6
1920	30	30.6
1921	53	30.6
1922	45	30.6
1923	44	30.6
1924	27	30.6
1925	22	30.6
1926	22	30.6
1927	16	30.6
1928	19	30.6
1929	28	30.6
1930	34	40.1
1931	48	40.1
1932	27	40.1
1933	49	40.1
1934	54	40.1
1935	39	40.1
1936	49	40.1
1937	39	40.1
1938	25	40.1
1939	37	40.1
1940	38	35.7
1941	38	35.7
1942	13	35.7
1943	40	35.7
1944	26	35.7
1945	30	35.7
1946	27	35.7
1947	50	35.7
1948	44	35.7
1949	51	35.7
1950	25	32.5
1951	11	32.5
1952	39	32.5
1953	34	32.5
1954	32	32.5
1955	42	32.5
1956	28	32.5
1957	24	32.5
1958	36	32.5
1959	54	32.5
1960	28	24.7
1961	42	24.7
1962	14	24.7
1963	23	24.7
1964	39	24.7
1965	11	24.7
1966	29	24.7
1967	17	24.7
1968	23	24.7
1969	21	24.7
1976	60	37
1977	30	37
1978	33	37
1979	25	37
1980	45	37.1
1981	15	37.1
1982	29	37.1
1983	54	37.1
1984	34	37.1
1985	26	37.1
1986	21	37.1
1987	51	37.1
1988	66	37.1
1989	30	37.1
1990	24	20
1991	25	20
1992	13	20
1993	8	20
1994	9	20
1995	27	20
1996	16	20
1997	21	20
1998	24	20
1999	33	20
2000	29	30.3
2001	42	30.3
2002	37	30.3
2003	31	30.3
2004	12	30.3
2005	35	30.3
2006	34	30.3
2007	48	30.3
2008	5	30.3

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
1895	1895-05-08	1895-09-20
1897	1897-06-13	1897-10-02
1899	1899-06-18	1899-09-11
1901	1901-05-01	1901-09-23
1902	1902-05-18	1902-09-14
1903	1903-06-07	1903-09-23
1904	1904-05-23	1904-09-10
1905	1905-06-03	1905-09-12
1906	1906-05-13	1906-09-11
1907	1907-06-16	1907-08-31
1908	1908-04-21	1908-09-21
1909	1909-06-28	1909-09-12
1910	1910-04-27	1910-08-21
1911	1911-05-10	1911-08-15
1912	1912-06-25	1912-09-08
1913	1913-04-30	1913-09-06
1914	1914-05-25	1914-10-02
1915	1915-05-12	1915-09-06
1916	1916-07-01	1916-09-05
1917	1917-06-18	1917-08-26
1918	1918-05-03	1918-08-25
1919	1919-05-28	1919-09-19
1920	1920-06-07	1920-09-22
1921	1921-05-21	1921-09-02
1922	1922-06-04	1922-10-03
1923	1923-05-28	1923-09-27
1924	1924-06-13	1924-08-31
1925	1925-05-19	1925-09-19
1926	1926-05-01	1926-08-27
1927	1927-06-24	1927-09-14
1928	1928-05-09	1928-10-10
1929	1929-06-10	1929-09-03
1930	1930-06-02	1930-08-31
1931	1931-05-15	1931-09-20
1932	1932-05-14	1932-09-30
1933	1933-06-01	1933-09-08
1934	1934-04-28	1934-10-11
1935	1935-07-02	1935-09-24
1936	1936-05-16	1936-09-23
1937	1937-06-23	1937-09-23
1938	1938-06-14	1938-09-03
1939	1939-05-05	1939-09-19
1940	1940-05-12	1940-09-19
1941	1941-05-18	1941-09-20
1942	1942-06-05	1942-08-22
1943	1943-05-28	1943-09-27
1944	1944-05-14	1944-09-18
1945	1945-06-22	1945-09-09
1946	1946-06-10	1946-09-04
1947	1947-06-26	1947-10-21
1948	1948-05-19	1948-09-18
1949	1949-05-03	1949-09-03
1950	1950-05-23	1950-09-01
1951	1951-07-15	1951-10-01
1952	1952-04-30	1952-09-27
1953	1953-05-29	1953-10-02
1954	1954-06-09	1954-09-01
1955	1955-05-02	1955-09-17
1956	1956-06-05	1956-09-27
1957	1957-07-01	1957-09-01
1958	1958-05-10	1958-09-03
1959	1959-05-01	1959-09-09
1960	1960-07-19	1960-09-06
1961	1961-05-31	1961-09-10
1962	1962-04-24	1962-08-28
1963	1963-05-07	1963-10-05
1964	1964-05-18	1964-09-02
1965	1965-06-19	1965-08-14
1966	1966-05-26	1966-09-09
1967	1967-06-30	1967-08-25
1968	1968-04-30	1968-08-24
1969	1969-05-27	1969-08-30
1976	1976-06-05	1976-09-30
1977	1977-04-10	1977-09-08
1978	1978-05-25	1978-09-11
1979	1979-05-29	1979-09-25
1980	1980-04-20	1980-09-09
1981	1981-06-07	1981-09-10
1982	1982-06-23	1982-08-20
1983	1983-06-10	1983-09-27
1984	1984-05-31	1984-09-20
1985	1985-04-18	1985-09-06
1986	1986-05-30	1986-09-01
1987	1987-04-17	1987-08-16
1988	1988-05-19	1988-09-12
1989	1989-06-18	1989-08-14
1990	1990-05-07	1990-09-13
1991	1991-05-14	1991-08-31
1992	1992-04-30	1992-10-02
1993	1993-06-11	1993-08-26
1994	1994-05-19	1994-08-24
1995	1995-06-14	1995-08-24
1996	1996-06-10	1996-08-14
1997	1997-06-01	1997-09-05
1998	1998-05-14	1998-09-19
1999	1999-05-29	1999-09-04
2000	2000-05-04	2000-09-18
2001	2001-05-14	2001-10-02
2002	2002-05-30	2002-09-09
2003	2003-04-14	2003-09-08
2004	2004-04-18	2004-07-22
2005	2005-06-18	2005-09-11
2006	2006-05-23	2006-08-22
2007	2007-05-13	2007-09-18
2008	2008-07-02	2008-08-19

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	105	66	1988	5
35 C (95 F): Days	80	26	1988	2
40 C (104 F): Days	7	7	1934	1
90 F (32.2 C): Days	105	42	1988	1
100 F (37.8 C): Days	23	12	1936	1
110 F (43.3 C): Days	1	2	1901	2
0 C (32 F): Ice days (max	105	112	1916	100
0 C (32 F): Frost days (min	105	203	1907	170
-10 C (14 F): Days with min	105	110	1950	94
-20 C (-4 F): Days with min	105	55	1917	36
-30 C (-22 F): Days with min	90	18	1916	1
-40 C (-40 F): Days with min	1	1	1912	1
20 C (68 F): Tropical nights (min	101	29	1983	15
25 C (77 F): Days with min	19	4	1988	2
10 mm (0.39 in): Days with 10 mm or more rain	102	38	1986	19
25 mm (0.98 in): Days with 25 mm or more rain	102	14	1985	5
50 mm (1.97 in): Days with 50 mm or more rain	59	5	1983	1
100 mm (3.94 in): Days with 100 mm or more rain	11	2	1983	1
10 cm (3.9 in): Days with 10 cm or more snowfall	63	11	1982	1
25 cm (9.8 in): Days with 25 cm or more snowfall	12	2	1951	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2001	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

New London Threshold Days by Year (USC00215842)

Key Facts for New London Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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