London Locks Threshold Days by Year

15 fixed thresholds counted per year at London Locks (USC00465365): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for London Locks Thresholds

London Locks: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 2020 with 58.
London Locks: days with 25 mm (0.98 in) or more of precipitation in 89 years, most in 2000 with 18.
London Locks: days with a maximum temperature at or above 30 C (86 F) in 87 years, most in 1959 with 96.
London Locks: days with a maximum temperature at or below 0 C (32 F) in 87 years, most in 1977 with 37.
15 fixed thresholds have at least one qualifying day at London Locks.

Days at or above 30 C (86 F)

87 years with a qualifying day

Days per year at London Locks with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 96 in 1959.

Days at or above 30 C (86 F) per year at London Locks
Year	Days	Decade average
1937	66	71
1938	57	71
1939	90	71
1940	62	73.6
1941	93	73.6
1942	76	73.6
1944	93	73.6
1945	78	73.6
1946	52	73.6
1947	72	73.6
1948	69	73.6
1949	67	73.6
1950	33	70.7
1951	69	70.7
1952	73	70.7
1953	90	70.7
1954	74	70.7
1955	82	70.7
1956	60	70.7
1957	77	70.7
1958	53	70.7
1959	96	70.7
1960	65	55.1
1961	63	55.1
1962	56	55.1
1963	26	55.1
1964	66	55.1
1965	65	55.1
1966	64	55.1
1967	13	55.1
1968	62	55.1
1969	71	55.1
1970	82	47
1971	64	47
1972	43	47
1973	65	47
1974	56	47
1975	62	47
1976	24	47
1977	36	47
1978	29	47
1979	9	47
1980	35	49.2
1981	24	49.2
1982	20	49.2
1983	76	49.2
1984	52	49.2
1985	43	49.2
1986	56	49.2
1987	83	49.2
1989	54	49.2
1990	64	58.4
1991	91	58.4
1992	33	58.4
1993	68	58.4
1995	69	58.4
1996	40	58.4
1997	40	58.4
1998	59	58.4
1999	62	58.4
2000	39	51.2
2001	56	51.2
2002	72	51.2
2003	28	51.2
2004	36	51.2
2005	69	51.2
2006	53	51.2
2007	82	51.2
2008	43	51.2
2009	34	51.2
2010	83	59.2
2011	77	59.2
2012	70	59.2
2013	34	59.2
2014	37	59.2
2015	52	59.2
2016	55	59.2
2017	45	59.2
2018	61	59.2
2019	78	59.2
2020	45	50.6
2021	47	50.6
2022	43	50.6
2023	38	50.6
2024	69	50.6
2025	62	50.6
2026	50	50.6

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

First to last qualifying date each year at London Locks
Year	First date	Last date
1937	1937-04-19	1937-09-05
1938	1938-04-28	1938-09-11
1939	1939-03-26	1939-10-11
1940	1940-05-07	1940-09-24
1941	1941-04-20	1941-10-08
1942	1942-04-06	1942-09-20
1944	1944-04-23	1944-10-06
1945	1945-03-29	1945-09-29
1946	1946-04-03	1946-09-29
1947	1947-04-06	1947-09-22
1948	1948-04-26	1948-09-22
1949	1949-05-05	1949-08-28
1950	1950-03-28	1950-09-03
1951	1951-05-03	1951-10-05
1952	1952-05-06	1952-10-01
1953	1953-04-30	1953-10-05
1954	1954-03-26	1954-10-13
1955	1955-04-19	1955-10-08
1956	1956-04-28	1956-09-14
1957	1957-04-21	1957-09-23
1958	1958-05-16	1958-09-27
1959	1959-04-02	1959-10-07
1960	1960-04-24	1960-09-10
1961	1961-04-25	1961-09-26
1962	1962-04-27	1962-10-16
1963	1963-04-18	1963-08-24
1964	1964-04-18	1964-09-12
1965	1965-05-02	1965-09-23
1966	1966-05-09	1966-09-04
1967	1967-05-28	1967-09-19
1968	1968-05-16	1968-09-25
1969	1969-04-18	1969-10-14
1970	1970-05-01	1970-10-14
1971	1971-04-14	1971-09-30
1972	1972-05-26	1972-08-27
1973	1973-03-15	1973-10-05
1974	1974-04-02	1974-09-20
1975	1975-05-20	1975-09-12
1976	1976-04-18	1976-08-28
1977	1977-05-18	1977-09-05
1978	1978-05-28	1978-09-22
1979	1979-05-11	1979-08-11
1980	1980-05-31	1980-09-15
1981	1981-06-06	1981-09-03
1982	1982-05-17	1982-08-05
1983	1983-05-08	1983-09-20
1984	1984-04-29	1984-09-22
1985	1985-04-19	1985-09-24
1986	1986-04-29	1986-10-01
1987	1987-04-23	1987-09-18
1989	1989-03-29	1989-09-22
1990	1990-03-15	1990-10-11
1991	1991-04-08	1991-10-04
1992	1992-05-12	1992-09-22
1993	1993-05-09	1993-09-15
1995	1995-05-25	1995-09-15
1996	1996-04-30	1996-08-24
1997	1997-06-21	1997-09-20
1998	1998-03-28	1998-09-28
1999	1999-04-23	1999-09-26
2000	2000-05-07	2000-09-12
2001	2001-04-09	2001-09-10
2002	2002-04-17	2002-10-05
2003	2003-06-26	2003-09-15
2004	2004-04-19	2004-09-06
2005	2005-06-06	2005-09-28
2006	2006-05-29	2006-09-20
2007	2007-04-26	2007-10-09
2008	2008-06-05	2008-09-15
2009	2009-04-25	2009-08-28
2010	2010-04-02	2010-10-27
2011	2011-04-11	2011-09-16
2012	2012-03-21	2012-09-08
2013	2013-04-11	2013-10-07
2014	2014-04-14	2014-09-07
2015	2015-05-07	2015-09-10
2016	2016-05-28	2016-09-26
2017	2017-04-30	2017-10-09
2018	2018-04-14	2018-10-08
2019	2019-04-19	2019-10-03
2020	2020-05-26	2020-09-10
2021	2021-05-22	2021-09-20
2022	2022-04-24	2022-09-22
2023	2023-04-06	2023-09-10
2024	2024-05-03	2024-09-24
2025	2025-04-19	2025-09-22
2026	2026-03-23	2026-10-02

Every Fixed Threshold

Fixed thresholds at London Locks
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	87	96	1959	50
35 C (95 F): Days	49	14	1953	1
90 F (32.2 C): Days	86	57	1953	15
100 F (37.8 C): Days	6	1	1948	1
0 C (32 F): Ice days (max	87	37	1977	15
0 C (32 F): Frost days (min	81	142	1960	46
-10 C (14 F): Days with min	73	40	1960	11
-20 C (-4 F): Days with min	10	6	1962	2
20 C (68 F): Tropical nights (min	78	56	2018	44
10 mm (0.39 in): Days with 10 mm or more rain	89	58	2020	24
25 mm (0.98 in): Days with 25 mm or more rain	89	18	2000	8
50 mm (1.97 in): Days with 50 mm or more rain	51	4	1945	3
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	5	1971	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1942	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for London Locks 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

London Locks Threshold Days by Year

Key Facts for London Locks Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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