Concord Threshold Days by Year (USC00191622)

16 fixed thresholds counted per year at Concord (USC00191622): 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 45 years, most in 1944 with 46.
Concord: days with a maximum temperature at or above 90 F (32.2 C) in 45 years, most in 1944 with 25.
Concord: days with a maximum temperature at or below 0 C (32 F) in 45 years, most in 1904 with 69.
Concord: nights with a minimum temperature at or below 0 C (32 F) in 45 years, most in 1904 with 180.
16 fixed thresholds have at least one qualifying day at Concord.

Days at or above 30 C (86 F)

45 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 46 in 1944.

Days at or above 30 C (86 F) per year at Concord
Year	Days	Decade average
1894	33	26.3
1895	27	26.3
1897	19	26.3
1898	26	26.3
1901	27	16.8
1902	17	16.8
1903	13	16.8
1904	9	16.8
1906	15	16.8
1907	14	16.8
1908	22	16.8
1909	17	16.8
1910	18	16.5
1911	24	16.5
1912	17	16.5
1913	18	16.5
1914	19	16.5
1915	10	16.5
1916	16	16.5
1917	11	16.5
1918	17	16.5
1919	15	16.5
1920	13	18.4
1921	21	18.4
1922	19	18.4
1923	19	18.4
1924	24	18.4
1925	22	18.4
1926	9	18.4
1927	10	18.4
1928	18	18.4
1929	29	18.4
1937	31	29.7
1938	20	29.7
1939	38	29.7
1940	19	32.5
1941	41	32.5
1942	28	32.5
1943	34	32.5
1944	46	32.5
1945	28	32.5
1946	23	32.5
1947	33	32.5
1948	31	32.5
1949	42	32.5

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
1894	1894-05-02	1894-09-10
1895	1895-05-04	1895-09-26
1897	1897-06-24	1897-10-16
1898	1898-06-08	1898-09-07
1901	1901-05-22	1901-09-07
1902	1902-05-24	1902-09-02
1903	1903-05-18	1903-09-15
1904	1904-05-26	1904-08-01
1906	1906-05-18	1906-09-19
1907	1907-06-18	1907-09-16
1908	1908-05-27	1908-09-11
1909	1909-06-21	1909-08-26
1910	1910-06-15	1910-08-25
1911	1911-05-11	1911-08-23
1912	1912-06-02	1912-09-11
1913	1913-06-16	1913-09-02
1914	1914-05-26	1914-09-24
1915	1915-04-26	1915-09-17
1916	1916-07-07	1916-09-14
1917	1917-06-20	1917-08-06
1918	1918-05-06	1918-08-23
1919	1919-05-29	1919-09-08
1920	1920-05-28	1920-09-26
1921	1921-05-21	1921-09-03
1922	1922-05-29	1922-10-02
1923	1923-04-21	1923-09-01
1924	1924-06-22	1924-09-02
1925	1925-06-03	1925-09-11
1926	1926-07-09	1926-09-25
1927	1927-04-20	1927-10-01
1928	1928-06-14	1928-10-12
1929	1929-04-08	1929-09-10
1937	1937-05-31	1937-09-04
1938	1938-04-28	1938-10-17
1939	1939-05-28	1939-10-10
1940	1940-06-03	1940-08-19
1941	1941-04-15	1941-10-05
1942	1942-04-30	1942-09-17
1943	1943-06-02	1943-09-16
1944	1944-05-04	1944-10-07
1945	1945-03-29	1945-09-29
1946	1946-05-25	1946-09-20
1947	1947-05-13	1947-10-17
1948	1948-06-25	1948-09-18
1949	1949-05-05	1949-10-10

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	45	46	1944	42
35 C (95 F): Days	25	10	1944	9
90 F (32.2 C): Days	45	25	1944	22
100 F (37.8 C): Days	3	4	1911	1
0 C (32 F): Ice days (max	45	69	1904	7
0 C (32 F): Frost days (min	45	180	1904	97
-10 C (14 F): Days with min	45	76	1904	15
-20 C (-4 F): Days with min	40	16	1904	16
-30 C (-22 F): Days with min	5	2	1904	1
20 C (68 F): Tropical nights (min	43	17	1949	17
10 mm (0.39 in): Days with 10 mm or more rain	45	45	1919	25
25 mm (0.98 in): Days with 25 mm or more rain	45	16	1920	3
50 mm (1.97 in): Days with 50 mm or more rain	28	4	1895	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1895	1
10 cm (3.9 in): Days with 10 cm or more snowfall	12	7	1926	4
25 cm (9.8 in): Days with 25 cm or more snowfall	4	3	1947	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

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

Concord Threshold Days by Year (USC00191622)

Key Facts for Concord Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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