Chilton Threshold Days by Year (USC00471568)

17 fixed thresholds counted per year at Chilton (USC00471568): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chilton Thresholds

Chilton: nights with a minimum temperature at or below 0 C (32 F) in 94 years, most in 1907 with 189.
Chilton: nights with a minimum temperature at or below -10 C (14 F) in 94 years, most in 2014 with 84.
Chilton: days with a maximum temperature at or above 30 C (86 F) in 93 years, most in 1988 with 57.
Chilton: days with a maximum temperature at or below 0 C (32 F) in 93 years, most in 1978 with 93.
17 fixed thresholds have at least one qualifying day at Chilton.

Days at or above 30 C (86 F)

93 years with a qualifying day

Days per year at Chilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 57 in 1988.

Days at or above 30 C (86 F) per year at Chilton
Year	Days	Decade average
1894	37	32.8
1895	54	32.8
1896	20	32.8
1897	30	32.8
1898	23	32.8
1902	13	14.8
1903	7	14.8
1904	5	14.8
1905	11	14.8
1906	25	14.8
1907	3	14.8
1908	31	14.8
1909	23	14.8
1945	30	35.8
1946	29	35.8
1947	42	35.8
1948	41	35.8
1949	37	35.8
1950	17	27.5
1951	8	27.5
1952	37	27.5
1953	29	27.5
1954	21	27.5
1955	49	27.5
1956	18	27.5
1957	30	27.5
1958	22	27.5
1959	44	27.5
1960	20	27.7
1961	30	27.7
1962	25	27.7
1963	33	27.7
1964	41	27.7
1965	18	27.7
1966	31	27.7
1967	22	27.7
1968	26	27.7
1969	31	27.7
1970	49	27.4
1971	31	27.4
1972	18	27.4
1973	31	27.4
1974	17	27.4
1975	35	27.4
1976	38	27.4
1977	25	27.4
1978	21	27.4
1979	9	27.4
1980	22	27.4
1983	38	27.4
1984	15	27.4
1985	17	27.4
1986	17	27.4
1987	37	27.4
1988	57	27.4
1989	16	27.4
1990	11	19
1991	27	19
1992	8	19
1993	7	19
1994	16	19
1995	38	19
1996	9	19
1997	12	19
1998	29	19
1999	33	19
2000	5	21
2001	31	21
2002	30	21
2003	17	21
2004	6	21
2005	41	21
2006	24	21
2007	37	21
2008	9	21
2009	10	21
2010	16	19.2
2011	18	19.2
2012	39	19.2
2013	20	19.2
2014	7	19.2
2015	17	19.2
2016	23	19.2
2017	12	19.2
2018	28	19.2
2019	12	19.2
2020	30	20.7
2021	25	20.7
2022	15	20.7
2023	20	20.7
2024	17	20.7
2025	19	20.7
2026	19	20.7

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

First to last qualifying date each year at Chilton
Year	First date	Last date
1894	1894-06-11	1894-09-05
1895	1895-05-09	1895-09-22
1896	1896-05-08	1896-08-11
1897	1897-06-13	1897-09-30
1898	1898-06-04	1898-09-29
1902	1902-05-19	1902-08-29
1903	1903-06-27	1903-07-28
1904	1904-07-15	1904-08-21
1905	1905-06-15	1905-09-29
1906	1906-05-17	1906-09-17
1907	1907-06-18	1907-09-01
1908	1908-06-07	1908-09-26
1909	1909-06-22	1909-08-27
1945	1945-06-23	1945-09-23
1946	1946-06-16	1946-09-27
1947	1947-06-27	1947-10-15
1948	1948-06-02	1948-09-18
1949	1949-05-03	1949-08-27
1950	1950-05-24	1950-08-17
1951	1951-07-23	1951-09-12
1952	1952-05-01	1952-09-28
1953	1953-05-09	1953-10-21
1954	1954-06-09	1954-09-07
1955	1955-05-03	1955-09-19
1956	1956-05-22	1956-08-28
1957	1957-06-16	1957-09-19
1958	1958-05-17	1958-08-31
1959	1959-05-02	1959-09-09
1960	1960-06-27	1960-09-08
1961	1961-05-13	1961-09-11
1962	1962-05-16	1962-09-03
1963	1963-06-02	1963-10-23
1964	1964-05-22	1964-09-08
1965	1965-05-07	1965-08-15
1966	1966-06-21	1966-09-10
1967	1967-06-02	1967-08-27
1968	1968-06-05	1968-09-04
1969	1969-05-28	1969-09-06
1970	1970-04-29	1970-09-08
1971	1971-06-04	1971-10-01
1972	1972-05-18	1972-08-30
1973	1973-06-10	1973-09-03
1974	1974-07-01	1974-08-27
1975	1975-05-18	1975-08-24
1976	1976-06-07	1976-09-09
1977	1977-05-13	1977-08-27
1978	1978-05-26	1978-09-11
1979	1979-06-15	1979-08-08
1980	1980-04-22	1980-08-20
1983	1983-06-12	1983-09-10
1984	1984-06-07	1984-08-30
1985	1985-06-08	1985-09-08
1986	1986-05-30	1986-08-17
1987	1987-04-20	1987-08-15
1988	1988-05-28	1988-08-18
1989	1989-06-22	1989-08-04
1990	1990-06-12	1990-09-04
1991	1991-05-12	1991-09-09
1992	1992-06-11	1992-08-26
1993	1993-08-11	1993-08-28
1994	1994-06-15	1994-09-16
1995	1995-06-16	1995-09-06
1996	1996-05-19	1996-09-05
1997	1997-06-23	1997-08-03
1998	1998-05-20	1998-09-15
1999	1999-05-30	1999-09-06
2000	2000-06-09	2000-09-01
2001	2001-06-12	2001-08-10
2002	2002-04-16	2002-09-10
2003	2003-06-24	2003-09-12
2004	2004-06-08	2004-09-15
2005	2005-06-06	2005-10-05
2006	2006-05-29	2006-09-18
2007	2007-05-15	2007-10-08
2008	2008-06-07	2008-09-03
2009	2009-06-21	2009-08-16
2010	2010-05-24	2010-08-31
2011	2011-05-31	2011-08-25
2012	2012-05-20	2012-09-05
2013	2013-05-01	2013-09-11
2014	2014-06-01	2014-08-30
2015	2015-07-18	2015-09-07
2016	2016-06-11	2016-09-07
2017	2017-06-11	2017-09-26
2018	2018-05-25	2018-09-18
2019	2019-06-28	2019-08-04
2020	2020-05-26	2020-08-27
2021	2021-06-04	2021-08-29
2022	2022-05-13	2022-09-02
2023	2023-05-31	2023-10-02
2024	2024-06-05	2024-09-20
2025	2025-06-22	2025-10-05
2026	2026-05-27	2026-09-02

Every Fixed Threshold

Fixed thresholds at Chilton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	93	57	1988	19
35 C (95 F): Days	40	16	1988	1
90 F (32.2 C): Days	90	42	1988	10
100 F (37.8 C): Days	5	2	1988	2
0 C (32 F): Ice days (max	93	93	1978	42
0 C (32 F): Frost days (min	94	189	1907	95
-10 C (14 F): Days with min	94	84	2014	35
-20 C (-4 F): Days with min	93	39	2014	9
-30 C (-22 F): Days with min	17	6	1996	3
20 C (68 F): Tropical nights (min	93	43	1896	8
25 C (77 F): Days with min	15	7	1896	1
10 mm (0.39 in): Days with 10 mm or more rain	89	44	2019	24
25 mm (0.98 in): Days with 25 mm or more rain	88	15	2018	8
50 mm (1.97 in): Days with 50 mm or more rain	56	5	2018	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1986	1
10 cm (3.9 in): Days with 10 cm or more snowfall	72	11	1971	2
25 cm (9.8 in): Days with 25 cm or more snowfall	15	3	1971	1

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 Chilton 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).

Chilton Threshold Days by Year (USC00471568)

Key Facts for Chilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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