Gann Valley 4NW Threshold Days by Year (USC00393217)

22 fixed thresholds counted per year at Gann Valley 4NW (USC00393217): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Gann Valley 4NW Thresholds

Gann Valley 4NW: days with 10 mm (0.39 in) or more of precipitation in 99 years, most in 1941 with 27.
Gann Valley 4NW: days with a maximum temperature at or above 30 C (86 F) in 98 years, most in 1939 with 110.
Gann Valley 4NW: days with a maximum temperature at or above 90 F (32.2 C) in 98 years, most in 1931 with 92.
Gann Valley 4NW: days with a maximum temperature at or below 0 C (32 F) in 98 years, most in 1996 with 92.
22 fixed thresholds have at least one qualifying day at Gann Valley 4NW.

Days at or above 30 C (86 F)

98 years with a qualifying day

Days per year at Gann Valley 4NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 110 in 1939.

Days at or above 30 C (86 F) per year at Gann Valley 4NW
Year	Days	Decade average
1898	58	58
1902	47	50.2
1903	54	50.2
1904	41	50.2
1905	45	50.2
1909	64	50.2
1910	84	62.2
1911	70	62.2
1917	52	62.2
1918	45	62.2
1919	60	62.2
1920	43	63.2
1921	69	63.2
1922	49	63.2
1924	37	63.2
1925	70	63.2
1926	75	63.2
1927	71	63.2
1928	73	63.2
1929	82	63.2
1930	80	96.3
1931	109	96.3
1932	82	96.3
1933	101	96.3
1934	103	96.3
1935	88	96.3
1936	105	96.3
1937	83	96.3
1938	102	96.3
1939	110	96.3
1940	96	59.3
1941	81	59.3
1942	40	59.3
1943	69	59.3
1944	32	59.3
1945	38	59.3
1946	42	59.3
1947	62	59.3
1948	74	59.3
1950	36	56
1951	21	56
1952	69	56
1953	56	56
1954	50	56
1955	88	56
1956	54	56
1957	45	56
1958	60	56
1959	81	56
1960	54	56.2
1961	71	56.2
1962	26	56.2
1963	61	56.2
1964	69	56.2
1965	59	56.2
1966	63	56.2
1967	53	56.2
1968	51	56.2
1969	55	56.2
1970	76	67
1971	71	67
1972	52	67
1973	63	67
1974	65	67
1975	70	67
1976	88	67
1977	59	67
1978	74	67
1979	52	67
1980	87	66.4
1981	62	66.4
1982	49	66.4
1983	80	66.4
1984	68	66.4
1985	60	66.4
1986	50	66.4
1987	66	66.4
1988	72	66.4
1989	70	66.4
1990	56	37.8
1991	49	37.8
1992	20	37.8
1993	12	37.8
1994	34	37.8
1995	46	37.8
1996	40	37.8
1997	33	37.8
1998	49	37.8
1999	39	37.8
2000	64	54.6
2001	57	54.6
2002	64	54.6
2003	63	54.6
2004	35	54.6
2005	56	54.6
2006	72	54.6
2007	47	54.6
2008	33	54.6

For each year, a bar from the first to the last day at Gann Valley 4NW meeting 30 C (86 F).

First to last qualifying date each year at Gann Valley 4NW
Year	First date	Last date
1898	1898-04-15	1898-10-01
1902	1902-04-20	1902-09-15
1903	1903-06-05	1903-10-02
1904	1904-05-22	1904-10-09
1905	1905-06-01	1905-10-06
1909	1909-05-04	1909-10-06
1910	1910-03-21	1910-10-17
1911	1911-05-08	1911-09-22
1917	1917-05-16	1917-09-08
1918	1918-05-03	1918-09-08
1919	1919-05-28	1919-09-18
1920	1920-06-08	1920-10-07
1921	1921-03-18	1921-09-02
1922	1922-06-05	1922-10-04
1924	1924-04-14	1924-10-17
1925	1925-04-11	1925-09-19
1926	1926-04-15	1926-09-17
1927	1927-06-07	1927-10-26
1928	1928-05-01	1928-10-11
1929	1929-04-29	1929-10-05
1930	1930-04-04	1930-10-10
1931	1931-04-11	1931-10-05
1932	1932-05-12	1932-10-06
1933	1933-05-16	1933-10-30
1934	1934-04-08	1934-10-12
1935	1935-06-08	1935-10-08
1936	1936-04-13	1936-10-18
1937	1937-05-22	1937-10-04
1938	1938-06-05	1938-10-09
1939	1939-04-21	1939-09-24
1940	1940-05-12	1940-10-25
1941	1941-05-13	1941-09-21
1942	1942-04-13	1942-10-07
1943	1943-03-30	1943-10-11
1944	1944-05-14	1944-09-17
1945	1945-06-22	1945-10-16
1946	1946-03-31	1946-09-05
1947	1947-06-27	1947-10-19
1948	1948-05-18	1948-09-29
1950	1950-05-22	1950-10-30
1951	1951-07-07	1951-10-01
1952	1952-04-27	1952-09-30
1953	1953-05-09	1953-10-13
1954	1954-05-22	1954-09-01
1955	1955-04-30	1955-10-10
1956	1956-06-03	1956-10-16
1957	1957-05-07	1957-09-01
1958	1958-04-16	1958-10-19
1959	1959-04-30	1959-09-14
1960	1960-06-26	1960-09-20
1961	1961-05-10	1961-10-06
1962	1962-04-24	1962-09-11
1963	1963-05-07	1963-10-05
1964	1964-04-16	1964-09-25
1965	1965-04-29	1965-09-02
1966	1966-05-04	1966-09-22
1967	1967-05-17	1967-10-01
1968	1968-04-30	1968-10-14
1969	1969-05-26	1969-09-15
1970	1970-05-17	1970-10-06
1971	1971-06-12	1971-09-14
1972	1972-05-17	1972-09-20
1973	1973-05-20	1973-09-10
1974	1974-06-03	1974-10-10
1975	1975-05-19	1975-10-08
1976	1976-06-05	1976-10-01
1977	1977-04-09	1977-09-08
1978	1978-03-30	1978-09-28
1979	1979-05-28	1979-09-27
1980	1980-04-20	1980-10-09
1981	1981-05-02	1981-09-20
1982	1982-05-03	1982-09-11
1983	1983-05-27	1983-09-28
1984	1984-05-16	1984-09-22
1985	1985-04-18	1985-09-19
1986	1986-04-23	1986-09-01
1987	1987-04-29	1987-10-05
1988	1988-05-13	1988-09-19
1989	1989-04-21	1989-10-25
1990	1990-04-23	1990-10-06
1991	1991-04-07	1991-10-17
1992	1992-04-06	1992-10-23
1993	1993-07-04	1993-10-07
1994	1994-05-11	1994-09-20
1995	1995-06-14	1995-09-29
1996	1996-04-11	1996-09-11
1997	1997-05-18	1997-10-03
1998	1998-05-18	1998-09-29
1999	1999-06-09	1999-09-07
2000	2000-05-05	2000-10-01
2001	2001-04-29	2001-10-03
2002	2002-05-29	2002-09-17
2003	2003-04-14	2003-10-11
2004	2004-04-29	2004-09-20
2005	2005-05-21	2005-10-02
2006	2006-05-19	2006-10-08
2007	2007-05-14	2007-10-07
2008	2008-07-02	2008-09-25

Every Fixed Threshold

Fixed thresholds at Gann Valley 4NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	98	110	1939	33
35 C (95 F): Days	97	72	1936	1
40 C (104 F): Days	57	43	1936	6
45 C (113 F): Days	3	13	1936	13
90 F (32.2 C): Days	98	92	1931	9
100 F (37.8 C): Days	86	54	1936	4
110 F (43.3 C): Days	18	20	1936	1
120 F (48.9 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	98	92	1996	56
0 C (32 F): Frost days (min	98	191	1951	178
-10 C (14 F): Days with min	98	103	1955	81
-20 C (-4 F): Days with min	98	44	1936	32
-30 C (-22 F): Days with min	65	12	1936	3
-40 C (-40 F): Days with min	2	2	1994	1
20 C (68 F): Tropical nights (min	94	36	1936	2
25 C (77 F): Days with min	15	5	1940	1
10 mm (0.39 in): Days with 10 mm or more rain	99	27	1941	22
25 mm (0.98 in): Days with 25 mm or more rain	97	11	1962	4
50 mm (1.97 in): Days with 50 mm or more rain	35	3	1944	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	2007	1
10 cm (3.9 in): Days with 10 cm or more snowfall	67	6	1995	3
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1920	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

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Data for Gann Valley 4NW 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Gann Valley 4NW Threshold Days by Year (USC00393217)

Key Facts for Gann Valley 4NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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