Valley View Lock 9 Threshold Days by Year (USC00158246)

6 fixed thresholds counted per year at Valley View Lock 9 (USC00158246): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Valley View Lock 9 Thresholds

Valley View Lock 9: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1972 with 52.
Valley View Lock 9: days with 25 mm (0.98 in) or more of precipitation in 51 years, most in 1935 with 20.
Valley View Lock 9: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 1935 with 5.
Valley View Lock 9: days with 10 cm (3.9 in) or more of snowfall in 9 years, most in 1960 with 4.
6 fixed thresholds have at least one qualifying day at Valley View Lock 9.

Days with 10 mm (0.39 in) or more of precipitation

51 years with a qualifying day

Days per year at Valley View Lock 9 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 1972.

Days with 10 mm (0.39 in) or more of precipitation per year at Valley View Lock 9
Year	Days	Decade average
1924	37	41.3
1925	33	41.3
1926	47	41.3
1927	38	41.3
1928	45	41.3
1929	48	41.3
1930	24	39.8
1931	46	39.8
1932	44	39.8
1933	43	39.8
1934	33	39.8
1935	49	39.8
1937	42	39.8
1938	35	39.8
1939	42	39.8
1940	30	36.6
1941	23	36.6
1942	47	36.6
1943	32	36.6
1944	32	36.6
1945	45	36.6
1946	39	36.6
1947	39	36.6
1948	42	36.6
1951	38	37.4
1953	33	37.4
1954	29	37.4
1955	44	37.4
1956	45	37.4
1957	38	37.4
1958	42	37.4
1959	30	37.4
1960	35	37.2
1961	46	37.2
1962	44	37.2
1963	32	37.2
1964	40	37.2
1965	34	37.2
1966	40	37.2
1967	38	37.2
1968	36	37.2
1969	27	37.2
1970	35	38.4
1971	28	38.4
1972	52	38.4
1973	39	38.4
1974	46	38.4
1975	46	38.4
1976	35	38.4
1977	29	38.4
1978	36	38.4

For each year, a bar from the first to the last day at Valley View Lock 9 meeting 10 mm (0.39 in).

First to last qualifying date each year at Valley View Lock 9
Year	First date	Last date
1924	1924-01-03	1924-12-24
1925	1925-01-11	1925-12-05
1926	1926-01-08	1926-12-28
1927	1927-01-18	1927-12-15
1928	1928-01-18	1928-12-17
1929	1929-01-18	1929-12-27
1930	1930-01-02	1930-12-05
1931	1931-01-11	1931-12-21
1932	1932-01-05	1932-12-30
1933	1933-01-08	1933-12-19
1934	1934-01-04	1934-12-31
1935	1935-01-15	1935-12-13
1937	1937-01-02	1937-12-28
1938	1938-01-21	1938-12-27
1939	1939-01-05	1939-12-27
1940	1940-02-06	1940-12-29
1941	1941-01-16	1941-12-13
1942	1942-01-01	1942-12-30
1943	1943-01-26	1943-12-29
1944	1944-01-03	1944-12-28
1945	1945-01-01	1945-12-25
1946	1946-01-07	1946-12-30
1947	1947-01-02	1947-12-16
1948	1948-01-01	1948-12-16
1951	1951-01-03	1951-12-26
1953	1953-01-07	1953-12-14
1954	1954-01-10	1954-12-30
1955	1955-01-05	1955-12-04
1956	1956-01-29	1956-12-23
1957	1957-01-09	1957-12-26
1958	1958-01-14	1958-12-24
1959	1959-01-01	1959-12-28
1960	1960-01-03	1960-12-30
1961	1961-01-01	1961-12-18
1962	1962-01-06	1962-12-22
1963	1963-02-11	1963-11-29
1964	1964-01-01	1964-12-26
1965	1965-01-09	1965-11-27
1966	1966-01-01	1966-12-28
1967	1967-01-27	1967-12-22
1968	1968-01-13	1968-12-28
1969	1969-01-29	1969-12-31
1970	1970-02-02	1970-12-22
1971	1971-01-04	1971-12-31
1972	1972-01-02	1972-12-15
1973	1973-01-04	1973-12-30
1974	1974-01-03	1974-12-25
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-07
1977	1977-01-10	1977-12-05
1978	1978-01-17	1978-12-21

Every Fixed Threshold

Fixed thresholds at Valley View Lock 9
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	51	52	1972	36
25 mm (0.98 in): Days with 25 mm or more rain	51	20	1935	17
50 mm (1.97 in): Days with 50 mm or more rain	44	5	1935	3
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1932	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	4	1960	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1960	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

Data for Valley View Lock 9 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).

Valley View Lock 9 Threshold Days by Year (USC00158246)

Key Facts for Valley View Lock 9 Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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