Dayton Mcd Threshold Days by Year (USC00332067)

18 fixed thresholds counted per year at Dayton Mcd (USC00332067): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dayton Mcd Thresholds

Dayton Mcd: days with 10 mm (0.39 in) or more of precipitation in 115 years, most in 1921 with 49.
Dayton Mcd: days with 25 mm (0.98 in) or more of precipitation in 115 years, most in 1990 with 19.
Dayton Mcd: days with a maximum temperature at or above 30 C (86 F) in 112 years, most in 1900 with 97.
Dayton Mcd: days with a maximum temperature at or above 90 F (32.2 C) in 112 years, most in 2019 with 71.
18 fixed thresholds have at least one qualifying day at Dayton Mcd.

Days at or above 30 C (86 F)

112 years with a qualifying day

Days per year at Dayton Mcd with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1900.

Days at or above 30 C (86 F) per year at Dayton Mcd
Year	Days	Decade average
1896	56	75.5
1897	80	75.5
1898	78	75.5
1899	88	75.5
1900	97	65.6
1901	80	65.6
1902	59	65.6
1903	70	65.6
1904	50	65.6
1905	47	65.6
1906	71	65.6
1907	51	65.6
1908	86	65.6
1909	45	65.6
1910	64	62
1911	76	62
1912	47	62
1913	75	62
1914	73	62
1915	32	62
1916	68	62
1917	43	62
1918	59	62
1919	83	62
1920	48	70.8
1921	89	70.8
1922	78	70.8
1923	68	70.8
1934	75	56.5
1935	45	56.5
1936	79	56.5
1937	48	56.5
1938	40	56.5
1939	52	56.5
1940	51	60.8
1941	66	60.8
1942	66	60.8
1943	64	60.8
1944	80	60.8
1945	55	60.8
1946	49	60.8
1947	51	60.8
1948	59	60.8
1949	67	60.8
1950	37	60.6
1951	57	60.6
1952	72	60.6
1953	77	60.6
1954	63	60.6
1955	72	60.6
1956	52	60.6
1957	59	60.6
1958	32	60.6
1959	85	60.6
1960	60	56.7
1961	51	56.7
1962	63	56.7
1963	56	56.7
1964	67	56.7
1965	64	56.7
1966	60	56.7
1967	42	56.7
1968	49	56.7
1969	55	56.7
1970	72	55.8
1971	58	55.8
1972	41	55.8
1973	59	55.8
1974	43	55.8
1975	64	55.8
1976	45	55.8
1977	69	55.8
1978	61	55.8
1979	46	55.8
1980	67	60.3
1981	36	60.3
1982	47	60.3
1983	76	60.3
1984	56	60.3
1986	60	60.3
1987	83	60.3
1988	72	60.3
1989	46	60.3
1990	52	67.7
1991	86	67.7
1992	31	67.7
1993	68	67.7
1994	72	67.7
1995	75	67.7
1996	66	67.7
1997	53	67.7
1998	92	67.7
1999	82	67.7
2000	60	58.3
2001	59	58.3
2002	87	58.3
2003	33	58.3
2004	52	58.3
2005	80	58.3
2006	58	58.3
2008	55	58.3
2009	41	58.3
2010	82	69.3
2011	77	69.3
2013	54	69.3
2014	51	69.3
2015	65	69.3
2016	74	69.3
2017	53	69.3
2018	73	69.3
2019	95	69.3
2020	87	87

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

First to last qualifying date each year at Dayton Mcd
Year	First date	Last date
1896	1896-04-16	1896-09-14
1897	1897-05-07	1897-10-16
1898	1898-05-18	1898-10-03
1899	1899-04-29	1899-10-15
1900	1900-05-12	1900-10-05
1901	1901-04-30	1901-09-24
1902	1902-05-03	1902-09-23
1903	1903-05-15	1903-10-03
1904	1904-05-25	1904-10-10
1905	1905-05-04	1905-09-28
1906	1906-05-15	1906-09-20
1907	1907-05-23	1907-09-20
1908	1908-05-16	1908-10-18
1909	1909-06-07	1909-09-23
1910	1910-03-24	1910-10-18
1911	1911-05-16	1911-09-27
1912	1912-05-27	1912-10-11
1913	1913-05-02	1913-10-10
1914	1914-05-19	1914-10-07
1915	1915-04-20	1915-09-16
1916	1916-05-06	1916-10-08
1917	1917-05-19	1917-09-15
1918	1918-05-22	1918-10-05
1919	1919-05-29	1919-10-04
1920	1920-05-23	1920-10-23
1921	1921-05-19	1921-09-29
1922	1922-05-09	1922-10-05
1923	1923-05-27	1923-09-27
1934	1934-05-04	1934-09-26
1935	1935-06-13	1935-09-20
1936	1936-05-07	1936-09-22
1937	1937-05-21	1937-09-04
1938	1938-05-03	1938-09-12
1939	1939-05-23	1939-10-08
1940	1940-05-08	1940-09-21
1941	1941-05-21	1941-09-30
1942	1942-04-30	1942-09-19
1943	1943-05-06	1943-09-04
1944	1944-05-13	1944-09-20
1945	1945-05-21	1945-09-28
1946	1946-06-07	1946-09-27
1947	1947-05-28	1947-09-20
1948	1948-04-26	1948-09-19
1949	1949-05-03	1949-08-27
1950	1950-05-05	1950-09-01
1951	1951-05-01	1951-10-05
1952	1952-05-05	1952-10-01
1953	1953-05-21	1953-10-03
1954	1954-05-24	1954-09-19
1955	1955-05-03	1955-09-21
1956	1956-05-11	1956-09-13
1957	1957-04-20	1957-09-21
1958	1958-06-04	1958-09-06
1959	1959-05-02	1959-10-04
1960	1960-04-23	1960-09-24
1961	1961-06-01	1961-09-24
1962	1962-04-26	1962-09-13
1963	1963-05-08	1963-10-06
1964	1964-05-18	1964-09-21
1965	1965-05-01	1965-09-22
1966	1966-05-23	1966-09-03
1967	1967-05-28	1967-10-05
1968	1968-06-07	1968-09-24
1969	1969-05-06	1969-09-07
1970	1970-04-30	1970-09-25
1971	1971-05-19	1971-10-03
1972	1972-05-25	1972-09-18
1973	1973-06-04	1973-09-29
1974	1974-05-15	1974-08-28
1975	1975-05-20	1975-10-14
1976	1976-04-21	1976-09-14
1977	1977-04-19	1977-09-10
1978	1978-05-20	1978-09-22
1979	1979-05-09	1979-09-13
1980	1980-05-06	1980-09-23
1981	1981-05-25	1981-09-14
1982	1982-05-06	1982-10-07
1983	1983-06-11	1983-09-20
1984	1984-06-03	1984-09-23
1986	1986-04-27	1986-10-01
1987	1987-04-22	1987-09-28
1988	1988-05-14	1988-08-26
1989	1989-05-31	1989-09-10
1990	1990-04-25	1990-09-07
1991	1991-05-12	1991-10-01
1992	1992-05-12	1992-09-16
1993	1993-05-09	1993-09-15
1994	1994-04-26	1994-10-02
1995	1995-05-24	1995-09-07
1996	1996-05-10	1996-09-12
1997	1997-05-25	1997-10-09
1998	1998-05-14	1998-10-07
1999	1999-05-05	1999-09-29
2000	2000-05-13	2000-10-04
2001	2001-04-08	2001-09-14
2002	2002-04-16	2002-10-04
2003	2003-05-10	2003-09-11
2004	2004-05-06	2004-09-25
2005	2005-05-12	2005-10-07
2006	2006-05-26	2006-10-05
2008	2008-06-06	2008-09-24
2009	2009-04-26	2009-09-16
2010	2010-04-16	2010-10-12
2011	2011-04-11	2011-09-14
2013	2013-04-11	2013-09-21
2014	2014-05-08	2014-10-03
2015	2015-05-06	2015-09-29
2016	2016-04-19	2016-09-26
2017	2017-05-17	2017-09-28
2018	2018-05-03	2018-10-09
2019	2019-05-18	2019-10-04
2020	2020-05-03	2020-09-26

Every Fixed Threshold

Fixed thresholds at Dayton Mcd
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	112	97	1900	87
35 C (95 F): Days	101	30	2019	28
40 C (104 F): Days	9	3	1934	1
90 F (32.2 C): Days	112	71	2019	63
100 F (37.8 C): Days	32	10	1897	3
0 C (32 F): Ice days (max	112	59	1978	12
0 C (32 F): Frost days (min	110	144	1917	97
-10 C (14 F): Days with min	110	48	1978	11
-20 C (-4 F): Days with min	48	11	1936	5
-30 C (-22 F): Days with min	1	2	1899	2
20 C (68 F): Tropical nights (min	110	85	2020	85
25 C (77 F): Days with min	53	18	2020	18
10 mm (0.39 in): Days with 10 mm or more rain	115	49	1921	32
25 mm (0.98 in): Days with 25 mm or more rain	115	19	1990	13
50 mm (1.97 in): Days with 50 mm or more rain	80	5	2026	5
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1979	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	4	1948	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

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Data for Dayton Mcd 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).

Dayton Mcd Threshold Days by Year (USC00332067)

Key Facts for Dayton Mcd Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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