Boone Threshold Days by Year (USC00130807)

19 fixed thresholds counted per year at Boone (USC00130807): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boone Thresholds

Boone: days with a maximum temperature at or above 30 C (86 F) in 116 years, most in 1934 with 92.
Boone: days with a maximum temperature at or above 90 F (32.2 C) in 116 years, most in 1934 with 67.
Boone: days with a maximum temperature at or below 0 C (32 F) in 116 years, most in 2010 with 78.
Boone: nights with a minimum temperature at or below 0 C (32 F) in 116 years, most in 1975 with 179.
19 fixed thresholds have at least one qualifying day at Boone.

Days at or above 30 C (86 F)

116 years with a qualifying day

Days per year at Boone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 92 in 1934.

Days at or above 30 C (86 F) per year at Boone
Year	Days	Decade average
1905	32	37.6
1906	38	37.6
1907	31	37.6
1908	43	37.6
1909	44	37.6
1910	56	44.5
1911	61	44.5
1912	36	44.5
1915	10	44.5
1916	57	44.5
1917	33	44.5
1918	53	44.5
1919	50	44.5
1920	48	46.9
1922	50	46.9
1923	44	46.9
1924	23	46.9
1925	65	46.9
1926	53	46.9
1927	53	46.9
1928	40	46.9
1929	46	46.9
1930	72	72.9
1931	77	72.9
1932	57	72.9
1933	75	72.9
1934	92	72.9
1935	54	72.9
1936	83	72.9
1937	72	72.9
1938	72	72.9
1939	75	72.9
1940	51	52.7
1942	40	52.7
1943	56	52.7
1944	55	52.7
1945	38	52.7
1946	43	52.7
1947	63	52.7
1948	63	52.7
1949	65	52.7
1950	36	52.2
1951	26	52.2
1952	56	52.2
1953	58	52.2
1954	66	52.2
1955	71	52.2
1956	67	52.2
1957	50	52.2
1958	33	52.2
1959	59	52.2
1960	38	46.6
1961	49	46.6
1962	51	46.6
1963	60	46.6
1964	56	46.6
1965	44	46.6
1966	52	46.6
1967	37	46.6
1968	42	46.6
1969	37	46.6
1970	47	45.4
1972	39	45.4
1973	42	45.4
1974	42	45.4
1975	55	45.4
1976	53	45.4
1977	53	45.4
1978	43	45.4
1979	35	45.4
1981	35	48.2
1982	26	48.2
1983	68	48.2
1984	47	48.2
1985	49	48.2
1986	40	48.2
1987	62	48.2
1988	76	48.2
1989	31	48.2
1990	41	35.9
1991	50	35.9
1992	17	35.9
1993	16	35.9
1994	34	35.9
1995	46	35.9
1996	22	35.9
1997	45	35.9
1998	50	35.9
1999	38	35.9
2000	45	38
2001	54	38
2002	55	38
2003	42	38
2004	22	38
2005	46	38
2006	42	38
2007	43	38
2008	18	38
2009	13	38
2010	30	35.5
2011	34	35.5
2012	62	35.5
2013	43	35.5
2014	13	35.5
2015	24	35.5
2016	40	35.5
2017	32	35.5
2018	40	35.5
2019	37	35.5
2020	61	47.1
2021	57	47.1
2022	49	47.1
2023	38	47.1
2024	37	47.1
2025	42	47.1
2026	46	47.1

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

First to last qualifying date each year at Boone
Year	First date	Last date
1905	1905-06-05	1905-09-28
1906	1906-04-25	1906-09-17
1907	1907-03-22	1907-09-19
1908	1908-05-20	1908-09-24
1909	1909-05-06	1909-10-08
1910	1910-04-29	1910-10-17
1911	1911-05-10	1911-09-15
1912	1912-05-23	1912-09-10
1915	1915-05-13	1915-09-14
1916	1916-05-08	1916-10-08
1917	1917-05-17	1917-09-17
1918	1918-05-04	1918-10-12
1919	1919-05-30	1919-09-20
1920	1920-05-22	1920-10-11
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-05
1924	1924-04-24	1924-08-30
1925	1925-04-22	1925-09-20
1926	1926-04-30	1926-09-21
1927	1927-04-26	1927-10-26
1928	1928-05-09	1928-10-11
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-10-10
1931	1931-04-08	1931-09-20
1932	1932-05-05	1932-10-02
1933	1933-05-18	1933-09-25
1934	1934-05-06	1934-09-24
1935	1935-06-12	1935-09-24
1936	1936-05-16	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-03-21	1938-10-16
1939	1939-04-24	1939-10-07
1940	1940-05-12	1940-09-22
1942	1942-04-29	1942-09-16
1943	1943-05-28	1943-09-05
1944	1944-05-14	1944-09-17
1945	1945-05-20	1945-09-23
1946	1946-06-06	1946-09-26
1947	1947-06-09	1947-10-21
1948	1948-04-18	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-05-04	1950-10-30
1951	1951-06-25	1951-09-11
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-15
1954	1954-04-14	1954-09-27
1955	1955-05-02	1955-09-18
1956	1956-05-12	1956-10-12
1957	1957-06-04	1957-09-01
1958	1958-05-11	1958-09-24
1959	1959-05-01	1959-09-09
1960	1960-04-22	1960-09-07
1961	1961-05-31	1961-09-10
1962	1962-05-05	1962-09-12
1963	1963-05-08	1963-10-07
1964	1964-04-16	1964-09-09
1965	1965-04-30	1965-09-09
1966	1966-05-05	1966-10-07
1967	1967-04-16	1967-10-02
1968	1968-04-11	1968-09-07
1969	1969-05-27	1969-08-31
1970	1970-04-29	1970-09-21
1972	1972-05-18	1972-09-20
1973	1973-05-19	1973-09-01
1974	1974-05-21	1974-09-27
1975	1975-05-19	1975-10-14
1976	1976-05-21	1976-10-02
1977	1977-04-28	1977-09-07
1978	1978-05-26	1978-09-17
1979	1979-05-18	1979-09-12
1981	1981-04-26	1981-10-01
1982	1982-05-05	1982-09-12
1983	1983-06-10	1983-10-03
1984	1984-05-18	1984-09-20
1985	1985-04-18	1985-09-20
1986	1986-03-30	1986-09-27
1987	1987-04-20	1987-09-27
1988	1988-05-13	1988-09-18
1989	1989-04-25	1989-09-01
1990	1990-04-24	1990-10-06
1991	1991-04-07	1991-09-14
1992	1992-05-01	1992-08-25
1993	1993-06-12	1993-10-08
1994	1994-04-19	1994-10-01
1995	1995-06-08	1995-10-13
1996	1996-05-18	1996-09-05
1997	1997-05-19	1997-10-08
1998	1998-05-15	1998-09-30
1999	1999-05-29	1999-09-08
2000	2000-05-08	2000-09-19
2001	2001-04-27	2001-10-03
2002	2002-04-16	2002-10-01
2003	2003-04-02	2003-10-21
2004	2004-04-17	2004-09-20
2005	2005-06-07	2005-10-05
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-09-22
2008	2008-06-08	2008-09-02
2009	2009-04-25	2009-08-15
2010	2010-05-25	2010-10-09
2011	2011-04-11	2011-09-13
2012	2012-04-26	2012-09-12
2013	2013-05-15	2013-09-19
2014	2014-05-08	2014-09-05
2015	2015-06-10	2015-09-17
2016	2016-05-07	2016-09-24
2017	2017-05-16	2017-09-25
2018	2018-05-24	2018-10-04
2019	2019-05-17	2019-10-01
2020	2020-06-02	2020-10-10
2021	2021-04-27	2021-09-30
2022	2022-05-10	2022-09-21
2023	2023-05-31	2023-10-03
2024	2024-05-19	2024-10-06
2025	2025-05-11	2025-10-04
2026	2026-03-22	2026-10-13

Every Fixed Threshold

Fixed thresholds at Boone
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	116	92	1934	46
35 C (95 F): Days	99	49	1934	3
40 C (104 F): Days	9	16	1934	3
90 F (32.2 C): Days	116	67	1934	17
100 F (37.8 C): Days	38	27	1934	1
110 F (43.3 C): Days	2	3	1936	3
0 C (32 F): Ice days (max	116	78	2010	30
0 C (32 F): Frost days (min	116	179	1975	86
-10 C (14 F): Days with min	116	90	1978	28
-20 C (-4 F): Days with min	115	39	1985	6
-30 C (-22 F): Days with min	36	6	1982	2
20 C (68 F): Tropical nights (min	116	42	1947	22
25 C (77 F): Days with min	20	3	1917	1
10 mm (0.39 in): Days with 10 mm or more rain	115	46	2015	38
25 mm (0.98 in): Days with 25 mm or more rain	115	17	2025	19
50 mm (1.97 in): Days with 50 mm or more rain	93	6	1954	6
100 mm (3.94 in): Days with 100 mm or more rain	11	1	1907	1
10 cm (3.9 in): Days with 10 cm or more snowfall	81	6	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	10	2	1994	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

Download the Data

Data for Boone 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).

Boone Threshold Days by Year (USC00130807)

Key Facts for Boone Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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