Decatur Threshold Days by Year (USC00012207)

17 fixed thresholds counted per year at Decatur (USC00012207): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Decatur Thresholds

Decatur: days with a maximum temperature at or above 30 C (86 F) in 69 years, most in 1936 with 144.
Decatur: days with a maximum temperature at or above 35 C (95 F) in 69 years, most in 1902 with 72.
Decatur: days with a maximum temperature at or above 90 F (32.2 C) in 69 years, most in 1954 with 109.
Decatur: nights with a minimum temperature at or below 0 C (32 F) in 68 years, most in 1960 with 93.
17 fixed thresholds have at least one qualifying day at Decatur.

Days at or above 30 C (86 F)

69 years with a qualifying day

Days per year at Decatur with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 144 in 1936.

Days at or above 30 C (86 F) per year at Decatur
Year	Days	Decade average
1897	123	129.3
1898	132	129.3
1899	133	129.3
1900	118	103.9
1901	95	103.9
1902	122	103.9
1903	82	103.9
1904	93	103.9
1905	77	103.9
1906	128	103.9
1907	119	103.9
1908	109	103.9
1909	96	103.9
1910	117	106.9
1911	130	106.9
1912	96	106.9
1914	109	106.9
1915	94	106.9
1916	118	106.9
1917	103	106.9
1918	112	106.9
1919	83	106.9
1920	80	95.3
1921	119	95.3
1922	100	95.3
1923	74	95.3
1924	90	95.3
1925	133	95.3
1926	100	95.3
1927	100	95.3
1928	74	95.3
1929	83	95.3
1930	114	123.4
1931	129	123.4
1932	109	123.4
1933	132	123.4
1934	128	123.4
1935	126	123.4
1936	144	123.4
1937	118	123.4
1938	118	123.4
1939	116	123.4
1940	93	101.8
1941	133	101.8
1942	104	101.8
1943	115	101.8
1944	108	101.8
1945	99	101.8
1946	82	101.8
1947	102	101.8
1948	93	101.8
1949	89	101.8
1950	69	106.9
1951	108	106.9
1952	110	106.9
1953	119	106.9
1954	126	106.9
1955	115	106.9
1956	103	106.9
1957	110	106.9
1959	102	106.9
1960	102	101.1
1961	80	101.1
1962	124	101.1
1963	98	101.1
1964	102	101.1
1965	109	101.1
1966	84	101.1
1968	110	101.1

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

First to last qualifying date each year at Decatur
Year	First date	Last date
1897	1897-04-28	1897-10-18
1898	1898-05-02	1898-10-06
1899	1899-04-28	1899-10-15
1900	1900-04-26	1900-10-03
1901	1901-04-30	1901-09-17
1902	1902-04-22	1902-10-05
1903	1903-04-13	1903-10-06
1904	1904-05-23	1904-10-11
1905	1905-04-11	1905-09-29
1906	1906-04-11	1906-10-24
1907	1907-03-20	1907-10-07
1908	1908-03-17	1908-09-25
1909	1909-04-19	1909-10-06
1910	1910-03-06	1910-10-20
1911	1911-03-13	1911-10-08
1912	1912-05-11	1912-10-12
1914	1914-05-07	1914-09-22
1915	1915-04-20	1915-10-18
1916	1916-04-14	1916-10-17
1917	1917-04-02	1917-10-06
1918	1918-03-10	1918-10-07
1919	1919-06-08	1919-10-11
1920	1920-04-17	1920-09-28
1921	1921-05-23	1921-09-29
1922	1922-05-09	1922-10-05
1923	1923-06-04	1923-09-30
1924	1924-04-26	1924-09-21
1925	1925-04-17	1925-10-05
1926	1926-05-10	1926-10-04
1927	1927-04-29	1927-10-08
1928	1928-05-05	1928-10-10
1929	1929-03-25	1929-09-13
1930	1930-04-17	1930-10-17
1931	1931-04-16	1931-10-28
1932	1932-04-25	1932-09-19
1933	1933-04-30	1933-10-31
1934	1934-04-03	1934-10-22
1935	1935-03-20	1935-11-03
1936	1936-04-14	1936-10-22
1937	1937-04-18	1937-10-06
1938	1938-04-26	1938-10-19
1939	1939-05-11	1939-10-24
1940	1940-04-01	1940-10-27
1941	1941-05-02	1941-10-23
1942	1942-04-27	1942-10-18
1943	1943-04-08	1943-09-15
1944	1944-05-13	1944-10-06
1945	1945-03-16	1945-10-01
1946	1946-04-02	1946-09-27
1947	1947-04-08	1947-10-15
1948	1948-04-07	1948-09-23
1949	1949-05-05	1949-10-12
1950	1950-05-05	1950-10-16
1951	1951-04-30	1951-10-06
1952	1952-05-01	1952-10-01
1953	1953-05-01	1953-10-18
1954	1954-04-27	1954-10-12
1955	1955-04-16	1955-10-07
1956	1956-05-12	1956-10-01
1957	1957-04-23	1957-09-23
1959	1959-05-02	1959-10-06
1960	1960-04-24	1960-10-04
1961	1961-06-01	1961-11-01
1962	1962-05-01	1962-10-21
1963	1963-04-01	1963-10-27
1964	1964-04-21	1964-09-28
1965	1965-04-12	1965-10-18
1966	1966-05-09	1966-09-27
1968	1968-04-19	1968-10-15

Every Fixed Threshold

Fixed thresholds at Decatur
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	69	144	1936	110
35 C (95 F): Days	69	72	1902	18
40 C (104 F): Days	19	10	1902	1
90 F (32.2 C): Days	69	109	1954	66
100 F (37.8 C): Days	40	22	1902	1
0 C (32 F): Ice days (max	58	10	1940	3
0 C (32 F): Frost days (min	68	93	1960	82
-10 C (14 F): Days with min	50	14	1912	3
-20 C (-4 F): Days with min	1	1	1899	1
20 C (68 F): Tropical nights (min	68	112	1941	51
25 C (77 F): Days with min	29	10	1930	2
10 mm (0.39 in): Days with 10 mm or more rain	64	59	1932	36
25 mm (0.98 in): Days with 25 mm or more rain	64	24	1936	14
50 mm (1.97 in): Days with 50 mm or more rain	58	8	1951	4
100 mm (3.94 in): Days with 100 mm or more rain	13	2	1950	1
10 cm (3.9 in): Days with 10 cm or more snowfall	8	2	1966	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1964	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 Decatur 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).

Decatur Threshold Days by Year (USC00012207)

Key Facts for Decatur Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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