Walnut Threshold Days by Year (USC00118916)

19 fixed thresholds counted per year at Walnut (USC00118916): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Walnut Thresholds

Walnut: nights with a minimum temperature at or below 0 C (32 F) in 130 years, most in 2018 with 157.
Walnut: nights with a minimum temperature at or below -10 C (14 F) in 130 years, most in 2014 with 70.
Walnut: nights with a minimum temperature at or above 20 C (68 F) in 130 years, most in 1921 with 47.
Walnut: days with a maximum temperature at or above 30 C (86 F) in 128 years, most in 1894 with 101.
19 fixed thresholds have at least one qualifying day at Walnut.

Days at or above 30 C (86 F)

128 years with a qualifying day

Days per year at Walnut with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 101 in 1894.

Days at or above 30 C (86 F) per year at Walnut
Year	Days	Decade average
1893	94	72.4
1894	101	72.4
1896	55	72.4
1898	52	72.4
1899	60	72.4
1900	64	50.7
1901	79	50.7
1902	38	50.7
1903	35	50.7
1904	23	50.7
1905	42	50.7
1906	69	50.7
1907	33	50.7
1908	65	50.7
1909	59	50.7
1910	62	52.5
1911	54	52.5
1912	45	52.5
1913	73	52.5
1914	67	52.5
1915	30	52.5
1916	64	52.5
1917	35	52.5
1918	43	52.5
1919	52	52.5
1920	49	45.5
1921	52	45.5
1922	51	45.5
1923	58	45.5
1924	22	45.5
1925	63	45.5
1926	34	45.5
1927	36	45.5
1928	45	45.5
1929	45	45.5
1930	69	70.1
1931	73	70.1
1932	60	70.1
1933	78	70.1
1934	81	70.1
1935	62	70.1
1936	86	70.1
1937	67	70.1
1938	54	70.1
1939	71	70.1
1940	55	58.1
1941	67	58.1
1942	51	58.1
1943	67	58.1
1944	71	58.1
1945	39	58.1
1946	51	58.1
1947	58	58.1
1948	57	58.1
1949	65	58.1
1950	38	60.8
1951	39	60.8
1952	70	60.8
1953	75	60.8
1954	68	60.8
1955	76	60.8
1956	60	60.8
1957	64	60.8
1958	35	60.8
1959	83	60.8
1960	35	40.6
1961	40	40.6
1962	38	40.6
1963	51	40.6
1964	55	40.6
1965	29	40.6
1966	46	40.6
1967	21	40.6
1968	45	40.6
1969	46	40.6
1970	43	46.7
1971	64	46.7
1972	43	46.7
1973	45	46.7
1974	33	46.7
1975	49	46.7
1976	46	46.7
1977	52	46.7
1978	46	46.7
1979	46	46.7
1981	30	54.8
1982	57	54.8
1983	74	54.8
1984	54	54.8
1985	40	54.8
1986	43	54.8
1987	65	54.8
1988	75	54.8
1990	29	32.3
1991	55	32.3
1992	16	32.3
1993	19	32.3
1994	28	32.3
1995	44	32.3
1996	25	32.3
1997	31	32.3
1998	36	32.3
1999	40	32.3
2000	20	30.6
2001	33	30.6
2002	51	30.6
2003	25	30.6
2004	21	30.6
2005	57	30.6
2006	29	30.6
2009	9	30.6
2010	46	40.3
2011	51	40.3
2012	63	40.3
2013	36	40.3
2014	21	40.3
2015	20	40.3
2016	40	40.3
2017	37	40.3
2018	51	40.3
2019	38	40.3
2020	44	42.4
2021	57	42.4
2022	32	42.4
2023	39	42.4
2024	41	42.4
2025	53	42.4
2026	31	42.4

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

First to last qualifying date each year at Walnut
Year	First date	Last date
1893	1893-04-07	1893-10-01
1894	1894-04-16	1894-09-28
1896	1896-05-05	1896-09-10
1898	1898-05-24	1898-09-29
1899	1899-04-29	1899-10-13
1900	1900-05-12	1900-10-05
1901	1901-04-28	1901-09-26
1902	1902-04-21	1902-08-29
1903	1903-05-12	1903-09-07
1904	1904-05-22	1904-09-10
1905	1905-05-04	1905-10-08
1906	1906-05-14	1906-09-23
1907	1907-05-13	1907-09-15
1908	1908-05-16	1908-09-25
1909	1909-05-05	1909-09-20
1910	1910-04-29	1910-10-16
1911	1911-05-09	1911-09-14
1912	1912-05-21	1912-09-10
1913	1913-05-01	1913-09-07
1914	1914-05-10	1914-09-21
1915	1915-04-20	1915-09-14
1916	1916-05-07	1916-10-08
1917	1917-05-18	1917-09-05
1918	1918-05-04	1918-08-27
1919	1919-05-29	1919-09-20
1920	1920-06-08	1920-09-25
1921	1921-05-20	1921-09-01
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-05
1924	1924-05-05	1924-09-21
1925	1925-04-22	1925-09-20
1926	1926-04-30	1926-09-19
1927	1927-05-21	1927-09-17
1928	1928-05-02	1928-10-11
1929	1929-05-28	1929-09-04
1930	1930-04-10	1930-09-23
1931	1931-05-27	1931-09-21
1932	1932-05-14	1932-09-19
1933	1933-05-23	1933-09-25
1934	1934-05-03	1934-09-25
1935	1935-06-12	1935-10-13
1936	1936-05-06	1936-09-22
1937	1937-05-29	1937-09-23
1938	1938-05-03	1938-10-10
1939	1939-05-05	1939-10-07
1940	1940-05-13	1940-09-21
1941	1941-05-15	1941-09-24
1942	1942-04-29	1942-09-18
1943	1943-05-05	1943-09-05
1944	1944-05-15	1944-09-04
1945	1945-06-23	1945-09-09
1946	1946-06-07	1946-10-05
1947	1947-06-09	1947-10-15
1948	1948-04-24	1948-09-20
1949	1949-05-03	1949-08-26
1950	1950-05-19	1950-10-18
1951	1951-05-01	1951-10-04
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-02
1954	1954-06-09	1954-10-03
1955	1955-05-03	1955-09-19
1956	1956-05-11	1956-09-26
1957	1957-05-01	1957-09-19
1958	1958-05-11	1958-09-24
1959	1959-05-02	1959-09-23
1960	1960-06-28	1960-09-08
1961	1961-05-31	1961-09-11
1962	1962-05-16	1962-10-10
1963	1963-05-08	1963-10-15
1964	1964-05-18	1964-09-20
1965	1965-05-07	1965-09-17
1966	1966-05-27	1966-09-03
1967	1967-05-25	1967-10-04
1968	1968-05-02	1968-09-03
1969	1969-05-03	1969-10-04
1970	1970-04-28	1970-09-21
1971	1971-05-17	1971-10-02
1972	1972-05-18	1972-09-20
1973	1973-06-08	1973-09-02
1974	1974-06-20	1974-08-27
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-10-02
1977	1977-04-16	1977-08-31
1978	1978-05-26	1978-09-20
1979	1979-05-08	1979-09-12
1981	1981-05-30	1981-10-01
1982	1982-05-04	1982-10-06
1983	1983-06-08	1983-09-18
1984	1984-04-27	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-03-29	1986-09-28
1987	1987-04-20	1987-09-05
1988	1988-05-06	1988-09-22
1990	1990-04-25	1990-10-05
1991	1991-05-11	1991-09-15
1992	1992-05-01	1992-08-25
1993	1993-05-08	1993-08-30
1994	1994-05-22	1994-09-15
1995	1995-06-07	1995-09-06
1996	1996-05-18	1996-09-06
1997	1997-06-20	1997-10-09
1998	1998-05-15	1998-09-27
1999	1999-05-05	1999-09-26
2000	2000-06-01	2000-09-18
2001	2001-05-03	2001-09-07
2002	2002-04-15	2002-09-30
2003	2003-04-15	2003-09-07
2004	2004-04-16	2004-09-14
2005	2005-06-04	2005-10-05
2006	2006-05-24	2006-10-03
2009	2009-05-23	2009-08-15
2010	2010-05-23	2010-10-09
2011	2011-05-10	2011-09-12
2012	2012-05-19	2012-09-13
2013	2013-05-01	2013-09-29
2014	2014-05-09	2014-09-05
2015	2015-06-10	2015-09-10
2016	2016-05-25	2016-10-18
2017	2017-05-16	2017-10-03
2018	2018-05-03	2018-10-04
2019	2019-05-17	2019-10-02
2020	2020-05-25	2020-09-03
2021	2021-04-28	2021-10-02
2022	2022-05-11	2022-09-21
2023	2023-05-08	2023-10-04
2024	2024-05-19	2024-10-06
2025	2025-05-16	2025-10-05
2026	2026-05-18	2026-08-11

Every Fixed Threshold

Fixed thresholds at Walnut
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	128	101	1894	31
35 C (95 F): Days	102	39	1936	1
40 C (104 F): Days	8	12	1936	2
90 F (32.2 C): Days	128	76	1894	12
100 F (37.8 C): Days	34	19	1936	3
110 F (43.3 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	128	77	1978	28
0 C (32 F): Frost days (min	130	157	2018	72
-10 C (14 F): Days with min	130	70	2014	27
-20 C (-4 F): Days with min	122	33	1963	5
-30 C (-22 F): Days with min	21	3	2009	3
20 C (68 F): Tropical nights (min	130	47	1921	28
25 C (77 F): Days with min	48	5	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	124	46	2019	28
25 mm (0.98 in): Days with 25 mm or more rain	124	16	2015	7
50 mm (1.97 in): Days with 50 mm or more rain	101	5	1951	2
100 mm (3.94 in): Days with 100 mm or more rain	12	1	1926	1
10 cm (3.9 in): Days with 10 cm or more snowfall	96	8	2014	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	2000	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Walnut 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Walnut Threshold Days by Year (USC00118916)

Key Facts for Walnut Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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