Concord Threshold Days by Year (USC00311975)

18 fixed thresholds counted per year at Concord (USC00311975): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Concord Thresholds

Concord: days with a maximum temperature at or above 30 C (86 F) in 93 years, most in 2010 with 129.
Concord: days with a maximum temperature at or above 90 F (32.2 C) in 93 years, most in 2019 with 97.
Concord: days with 10 mm (0.39 in) or more of precipitation in 93 years, most in 1948 with 59.
Concord: days with 25 mm (0.98 in) or more of precipitation in 93 years, most in 2018 with 23.
18 fixed thresholds have at least one qualifying day at Concord.

Days at or above 30 C (86 F)

93 years with a qualifying day

Days per year at Concord with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 129 in 2010.

Days at or above 30 C (86 F) per year at Concord
Year	Days	Decade average
1934	103	100.5
1935	89	100.5
1936	111	100.5
1937	88	100.5
1938	103	100.5
1939	109	100.5
1940	102	99.4
1941	126	99.4
1942	115	99.4
1943	107	99.4
1944	106	99.4
1945	89	99.4
1946	72	99.4
1947	97	99.4
1948	92	99.4
1949	88	99.4
1950	102	101.9
1951	100	101.9
1952	101	101.9
1953	102	101.9
1954	122	101.9
1955	93	101.9
1956	96	101.9
1957	104	101.9
1958	97	101.9
1959	102	101.9
1960	97	89.2
1961	89	89.2
1962	105	89.2
1963	86	89.2
1964	95	89.2
1965	94	89.2
1966	82	89.2
1967	79	89.2
1968	84	89.2
1969	81	89.2
1970	118	95.9
1971	105	95.9
1972	89	95.9
1973	99	95.9
1974	85	95.9
1975	93	95.9
1976	85	95.9
1977	107	95.9
1978	113	95.9
1979	65	95.9
1980	117	97.7
1981	92	97.7
1982	92	97.7
1983	99	97.7
1984	97	97.7
1985	102	97.7
1986	111	97.7
1987	96	97.7
1988	84	97.7
1989	87	97.7
1990	103	86
1991	83	86
1992	70	86
1993	100	86
1994	79	86
1995	77	86
1996	77	86
1997	81	86
1998	111	86
1999	79	86
2000	79	91.3
2001	64	91.3
2002	98	91.3
2003	83	91.3
2004	89	91.3
2005	97	91.3
2006	96	91.3
2007	121	91.3
2008	98	91.3
2009	88	91.3
2010	129	114.2
2011	118	114.2
2012	102	114.2
2013	84	114.2
2014	102	114.2
2015	115	114.2
2016	127	114.2
2017	113	114.2
2018	126	114.2
2019	126	114.2
2020	94	79.9
2021	96	79.9
2022	87	79.9
2023	62	79.9
2024	61	79.9
2025	66	79.9
2026	93	79.9

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

First to last qualifying date each year at Concord
Year	First date	Last date
1934	1934-04-03	1934-10-22
1935	1935-03-21	1935-10-23
1936	1936-04-15	1936-09-29
1937	1937-04-18	1937-10-30
1938	1938-04-26	1938-10-20
1939	1939-05-06	1939-10-27
1940	1940-04-01	1940-10-28
1941	1941-04-14	1941-10-23
1942	1942-04-05	1942-09-24
1943	1943-04-27	1943-10-21
1944	1944-04-10	1944-10-07
1945	1945-03-17	1945-09-29
1946	1946-04-02	1946-09-25
1947	1947-05-14	1947-09-22
1948	1948-03-20	1948-09-21
1949	1949-05-04	1949-10-13
1950	1950-04-23	1950-10-31
1951	1951-04-26	1951-10-07
1952	1952-04-20	1952-10-02
1953	1953-04-24	1953-10-20
1954	1954-04-09	1954-10-14
1955	1955-04-20	1955-10-01
1956	1956-05-01	1956-10-02
1957	1957-04-22	1957-09-23
1958	1958-04-20	1958-10-11
1959	1959-04-09	1959-10-08
1960	1960-04-14	1960-10-04
1961	1961-04-25	1961-09-27
1962	1962-04-24	1962-10-14
1963	1963-04-04	1963-09-22
1964	1964-04-20	1964-09-24
1965	1965-04-10	1965-09-24
1966	1966-05-10	1966-09-12
1967	1967-03-16	1967-10-06
1968	1968-03-22	1968-09-27
1969	1969-05-06	1969-09-19
1970	1970-04-22	1970-10-14
1971	1971-04-13	1971-10-16
1972	1972-04-14	1972-09-30
1973	1973-05-12	1973-10-07
1974	1974-03-08	1974-11-04
1975	1975-04-29	1975-10-16
1976	1976-03-04	1976-09-26
1977	1977-04-11	1977-10-03
1978	1978-04-02	1978-10-24
1979	1979-05-12	1979-09-23
1980	1980-04-24	1980-10-12
1981	1981-04-28	1981-10-07
1982	1982-05-07	1982-10-07
1983	1983-04-28	1983-10-05
1984	1984-04-26	1984-10-30
1985	1985-03-30	1985-10-21
1986	1986-04-01	1986-10-06
1987	1987-04-23	1987-09-19
1988	1988-05-09	1988-09-25
1989	1989-04-19	1989-10-16
1990	1990-03-13	1990-10-10
1991	1991-04-30	1991-09-20
1992	1992-04-11	1992-09-23
1993	1993-05-10	1993-10-10
1994	1994-04-21	1994-09-17
1995	1995-04-19	1995-09-23
1996	1996-04-23	1996-09-11
1997	1997-05-19	1997-10-09
1998	1998-03-30	1998-10-02
1999	1999-04-05	1999-09-10
2000	2000-05-07	2000-09-26
2001	2001-04-08	2001-09-24
2002	2002-04-17	2002-10-06
2003	2003-04-30	2003-09-28
2004	2004-04-19	2004-09-23
2005	2005-04-20	2005-10-21
2006	2006-04-15	2006-10-06
2007	2007-03-25	2007-10-19
2008	2008-04-27	2008-10-17
2009	2009-04-25	2009-09-29
2010	2010-04-02	2010-10-28
2011	2011-03-19	2011-10-18
2012	2012-03-16	2012-10-03
2013	2013-04-10	2013-10-06
2014	2014-04-03	2014-10-12
2015	2015-04-10	2015-10-01
2016	2016-03-17	2016-10-21
2017	2017-04-18	2017-10-13
2018	2018-04-19	2018-10-09
2019	2019-04-24	2019-10-13
2020	2020-03-21	2020-10-09
2021	2021-04-08	2021-09-20
2022	2022-05-04	2022-09-23
2023	2023-03-25	2023-09-13
2024	2024-04-16	2024-09-23
2025	2025-04-05	2025-09-26
2026	2026-03-12	2026-10-15

Every Fixed Threshold

Fixed thresholds at Concord
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	93	129	2010	93
35 C (95 F): Days	91	50	1980	11
40 C (104 F): Days	8	4	1983	2
90 F (32.2 C): Days	93	97	2019	52
100 F (37.8 C): Days	50	14	1980	1
0 C (32 F): Ice days (max	66	7	1982	3
0 C (32 F): Frost days (min	92	109	1976	56
-10 C (14 F): Days with min	68	22	1977	7
-20 C (-4 F): Days with min	1	2	1985	2
20 C (68 F): Tropical nights (min	92	91	2018	66
25 C (77 F): Days with min	8	6	2010	4
10 mm (0.39 in): Days with 10 mm or more rain	93	59	1948	25
25 mm (0.98 in): Days with 25 mm or more rain	93	23	2018	9
50 mm (1.97 in): Days with 50 mm or more rain	87	7	2018	2
100 mm (3.94 in): Days with 100 mm or more rain	18	2	1997	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2008	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	3	2010	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	2004	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.

Download the Data

Data for Concord 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Concord Threshold Days by Year (USC00311975)

Key Facts for Concord Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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