Conception Threshold Days by Year (USC00231822)

19 fixed thresholds counted per year at Conception (USC00231822): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Conception Thresholds

Conception: days with a maximum temperature at or above 30 C (86 F) in 128 years, most in 1953 with 121.
Conception: days with a maximum temperature at or above 90 F (32.2 C) in 128 years, most in 1936 with 80.
Conception: days with a maximum temperature at or below 0 C (32 F) in 128 years, most in 1978 with 68.
Conception: days with 10 mm (0.39 in) or more of precipitation in 128 years, most in 1951 with 45.
19 fixed thresholds have at least one qualifying day at Conception.

Days at or above 30 C (86 F)

128 years with a qualifying day

Days per year at Conception with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 121 in 1953.

Days at or above 30 C (86 F) per year at Conception
Year	Days	Decade average
1895	40	45
1896	29	45
1897	60	45
1898	45	45
1899	51	45
1900	59	46.2
1901	72	46.2
1902	17	46.2
1903	44	46.2
1904	28	46.2
1905	54	46.2
1906	66	46.2
1907	29	46.2
1908	39	46.2
1909	54	46.2
1910	68	62.9
1911	87	62.9
1914	75	62.9
1915	12	62.9
1916	40	62.9
1917	56	62.9
1918	85	62.9
1919	80	62.9
1920	66	67.7
1921	98	67.7
1922	84	67.7
1923	54	67.7
1924	44	67.7
1925	75	67.7
1926	72	67.7
1927	61	67.7
1928	62	67.7
1929	61	67.7
1930	72	85.7
1931	94	85.7
1933	92	85.7
1934	81	85.7
1935	55	85.7
1936	98	85.7
1937	86	85.7
1938	93	85.7
1939	100	85.7
1940	56	67.2
1941	78	67.2
1942	61	67.2
1943	76	67.2
1944	73	67.2
1945	50	67.2
1946	60	67.2
1947	73	67.2
1948	80	67.2
1949	65	67.2
1950	42	78.8
1951	48	78.8
1952	92	78.8
1953	121	78.8
1954	91	78.8
1955	91	78.8
1956	108	78.8
1957	65	78.8
1958	52	78.8
1959	78	78.8
1960	71	55.9
1961	60	55.9
1962	67	55.9
1963	83	55.9
1964	69	55.9
1965	32	55.9
1966	45	55.9
1967	40	55.9
1968	47	55.9
1969	45	55.9
1970	61	59.9
1971	64	59.9
1972	51	59.9
1973	61	59.9
1974	46	59.9
1975	64	59.9
1976	74	59.9
1977	53	59.9
1978	70	59.9
1979	55	59.9
1980	91	62
1981	40	62
1983	77	62
1984	61	62
1985	39	62
1986	34	62
1987	71	62
1988	91	62
1989	54	62
1990	55	47.7
1991	61	47.7
1992	28	47.7
1993	40	47.7
1994	49	47.7
1995	48	47.7
1996	39	47.7
1997	55	47.7
1998	55	47.7
1999	47	47.7
2000	60	43.6
2001	52	43.6
2002	64	43.6
2003	53	43.6
2004	14	43.6
2005	54	43.6
2006	52	43.6
2007	48	43.6
2008	19	43.6
2009	20	43.6
2010	56	51.4
2011	61	51.4
2012	75	51.4
2013	51	51.4
2014	27	51.4
2015	31	51.4
2016	47	51.4
2017	49	51.4
2018	66	51.4
2019	51	51.4
2020	58	56.1
2021	65	56.1
2022	62	56.1
2023	49	56.1
2024	50	56.1
2025	50	56.1
2026	59	56.1

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

First to last qualifying date each year at Conception
Year	First date	Last date
1895	1895-03-28	1895-09-21
1896	1896-06-16	1896-09-16
1897	1897-06-11	1897-10-14
1898	1898-05-25	1898-09-28
1899	1899-06-12	1899-10-12
1900	1900-05-28	1900-09-10
1901	1901-06-10	1901-09-22
1902	1902-04-20	1902-08-18
1903	1903-06-19	1903-09-07
1904	1904-06-12	1904-09-28
1905	1905-04-09	1905-09-27
1906	1906-04-24	1906-09-25
1907	1907-07-01	1907-09-18
1908	1908-07-11	1908-10-14
1909	1909-05-05	1909-10-06
1910	1910-03-22	1910-10-02
1911	1911-05-08	1911-09-28
1914	1914-05-10	1914-09-16
1915	1915-04-28	1915-09-16
1916	1916-04-12	1916-10-08
1917	1917-05-17	1917-09-15
1918	1918-05-04	1918-10-12
1919	1919-05-30	1919-10-03
1920	1920-05-22	1920-10-10
1921	1921-05-20	1921-09-28
1922	1922-05-08	1922-10-27
1923	1923-06-03	1923-09-06
1924	1924-04-15	1924-09-07
1925	1925-04-22	1925-09-19
1926	1926-04-29	1926-09-23
1927	1927-05-17	1927-10-27
1928	1928-05-02	1928-10-11
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-09-25
1931	1931-04-08	1931-10-10
1933	1933-05-18	1933-09-25
1934	1934-05-06	1934-10-08
1935	1935-06-29	1935-09-24
1936	1936-04-20	1936-09-22
1937	1937-05-20	1937-10-29
1938	1938-06-05	1938-10-17
1939	1939-05-16	1939-10-24
1940	1940-04-14	1940-10-25
1941	1941-05-14	1941-09-22
1942	1942-04-04	1942-09-16
1943	1943-04-29	1943-09-05
1944	1944-05-14	1944-09-20
1945	1945-06-23	1945-09-24
1946	1946-06-06	1946-09-27
1947	1947-06-09	1947-10-21
1948	1948-04-15	1948-09-21
1949	1949-04-25	1949-10-08
1950	1950-04-22	1950-10-31
1951	1951-05-31	1951-09-12
1952	1952-04-29	1952-10-01
1953	1953-04-22	1953-10-18
1954	1954-04-06	1954-10-03
1955	1955-04-18	1955-10-26
1956	1956-04-01	1956-10-13
1957	1957-06-04	1957-09-02
1958	1958-05-28	1958-09-25
1959	1959-05-01	1959-09-09
1960	1960-04-22	1960-10-11
1961	1961-04-23	1961-09-11
1962	1962-05-05	1962-09-14
1963	1963-05-08	1963-10-19
1964	1964-04-16	1964-09-09
1965	1965-04-23	1965-09-10
1966	1966-05-06	1966-09-01
1967	1967-04-17	1967-10-05
1968	1968-05-03	1968-08-24
1969	1969-05-29	1969-10-04
1970	1970-04-29	1970-09-10
1971	1971-06-04	1971-10-01
1972	1972-04-07	1972-09-20
1973	1973-06-09	1973-09-22
1974	1974-06-15	1974-09-09
1975	1975-04-18	1975-10-13
1976	1976-06-09	1976-10-04
1977	1977-05-26	1977-09-09
1978	1978-05-25	1978-09-19
1979	1979-05-29	1979-09-30
1980	1980-04-22	1980-10-10
1981	1981-04-26	1981-10-01
1983	1983-06-14	1983-10-03
1984	1984-06-06	1984-09-25
1985	1985-05-27	1985-09-20
1986	1986-03-30	1986-09-29
1987	1987-04-21	1987-09-28
1988	1988-05-12	1988-09-23
1989	1989-04-22	1989-10-15
1990	1990-06-12	1990-10-06
1991	1991-05-14	1991-10-11
1992	1992-04-30	1992-10-04
1993	1993-05-16	1993-09-13
1994	1994-05-12	1994-10-01
1995	1995-06-08	1995-09-07
1996	1996-04-12	1996-09-05
1997	1997-05-18	1997-10-07
1998	1998-05-20	1998-09-29
1999	1999-06-05	1999-09-25
2000	2000-04-06	2000-09-19
2001	2001-05-15	2001-09-06
2002	2002-04-16	2002-09-30
2003	2003-04-14	2003-10-20
2004	2004-04-16	2004-09-14
2005	2005-05-11	2005-09-26
2006	2006-04-14	2006-10-04
2007	2007-06-16	2007-08-29
2008	2008-06-26	2008-09-02
2009	2009-05-24	2009-08-15
2010	2010-05-23	2010-10-09
2011	2011-04-04	2011-09-13
2012	2012-04-03	2012-09-13
2013	2013-05-15	2013-10-05
2014	2014-05-08	2014-09-05
2015	2015-06-08	2015-09-07
2016	2016-06-10	2016-09-22
2017	2017-05-16	2017-09-25
2018	2018-05-11	2018-10-04
2019	2019-05-17	2019-10-02
2020	2020-06-03	2020-10-08
2021	2021-05-27	2021-10-09
2022	2022-05-10	2022-09-25
2023	2023-04-05	2023-10-03
2024	2024-04-15	2024-10-12
2025	2025-05-15	2025-10-04
2026	2026-03-22	2026-10-13

Every Fixed Threshold

Fixed thresholds at Conception
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	128	121	1953	59
35 C (95 F): Days	104	60	1936	11
40 C (104 F): Days	23	26	1936	1
90 F (32.2 C): Days	128	80	1936	34
100 F (37.8 C): Days	47	45	1936	10
110 F (43.3 C): Days	2	1	1934	1
0 C (32 F): Ice days (max	128	68	1978	17
0 C (32 F): Frost days (min	124	158	1980	61
-10 C (14 F): Days with min	124	70	1978	23
-20 C (-4 F): Days with min	113	26	1936	7
-30 C (-22 F): Days with min	12	2	1899	2
20 C (68 F): Tropical nights (min	124	62	1901	45
25 C (77 F): Days with min	66	18	1936	6
10 mm (0.39 in): Days with 10 mm or more rain	128	45	1951	33
25 mm (0.98 in): Days with 25 mm or more rain	128	17	2015	13
50 mm (1.97 in): Days with 50 mm or more rain	113	6	1993	2
100 mm (3.94 in): Days with 100 mm or more rain	24	3	1993	1
10 cm (3.9 in): Days with 10 cm or more snowfall	70	6	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1940	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

Data for Conception 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).

Conception Threshold Days by Year (USC00231822)

Key Facts for Conception Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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