Richmond City Locks Threshold Days by Year (USC00447196)

6 fixed thresholds counted per year at Richmond City Locks (USC00447196): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richmond City Locks Thresholds

Richmond City Locks: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1937 with 48.
Richmond City Locks: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1908 with 18.
Richmond City Locks: days with 50 mm (1.97 in) or more of precipitation in 50 years, most in 1937 with 5.
Richmond City Locks: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 1910 with 1.
6 fixed thresholds have at least one qualifying day at Richmond City Locks.

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

54 years with a qualifying day

Days per year at Richmond City Locks with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1937.

Days with 10 mm (0.39 in) or more of precipitation per year at Richmond City Locks
Year	Days	Decade average
1893	41	35.5
1894	39	35.5
1895	33	35.5
1897	26	35.5
1898	34	35.5
1899	40	35.5
1900	34	35.2
1901	35	35.2
1902	40	35.2
1903	38	35.2
1904	29	35.2
1905	32	35.2
1906	34	35.2
1907	38	35.2
1908	43	35.2
1909	29	35.2
1910	34	33.5
1911	33	33.5
1912	32	33.5
1913	26	33.5
1914	31	33.5
1915	33	33.5
1916	33	33.5
1917	40	33.5
1918	38	33.5
1919	35	33.5
1920	43	36.4
1921	26	36.4
1922	46	36.4
1923	36	36.4
1924	45	36.4
1925	33	36.4
1926	32	36.4
1927	38	36.4
1928	34	36.4
1929	31	36.4
1930	27	36.7
1931	40	36.7
1932	34	36.7
1933	35	36.7
1934	34	36.7
1935	40	36.7
1936	31	36.7
1937	48	36.7
1938	40	36.7
1939	38	36.7
1940	35	34
1941	18	34
1942	43	34
1943	33	34
1944	36	34
1945	42	34
1946	33	34
1947	32	34

For each year, a bar from the first to the last day at Richmond City Locks meeting 10 mm (0.39 in).

First to last qualifying date each year at Richmond City Locks
Year	First date	Last date
1893	1893-01-02	1893-12-31
1894	1894-01-08	1894-12-27
1895	1895-01-09	1895-11-10
1897	1897-02-02	1897-12-26
1898	1898-02-19	1898-12-23
1899	1899-01-01	1899-12-12
1900	1900-01-12	1900-12-31
1901	1901-01-12	1901-12-30
1902	1902-01-22	1902-12-30
1903	1903-01-03	1903-12-21
1904	1904-01-23	1904-12-06
1905	1905-01-07	1905-12-29
1906	1906-01-04	1906-12-31
1907	1907-02-05	1907-12-30
1908	1908-01-07	1908-12-23
1909	1909-01-06	1909-12-26
1910	1910-01-06	1910-12-24
1911	1911-01-01	1911-12-24
1912	1912-01-08	1912-12-31
1913	1913-01-07	1913-12-26
1914	1914-01-03	1914-12-26
1915	1915-01-07	1915-12-29
1916	1916-01-07	1916-12-22
1917	1917-01-14	1917-12-12
1918	1918-01-12	1918-12-23
1919	1919-01-03	1919-12-09
1920	1920-01-25	1920-12-23
1921	1921-01-10	1921-12-25
1922	1922-01-11	1922-12-17
1923	1923-01-01	1923-12-14
1924	1924-01-01	1924-12-31
1925	1925-01-01	1925-12-23
1926	1926-01-04	1926-12-29
1927	1927-02-14	1927-12-31
1928	1928-01-19	1928-12-15
1929	1929-01-06	1929-12-23
1930	1930-01-15	1930-12-27
1931	1931-01-06	1931-12-22
1932	1932-01-01	1932-12-29
1933	1933-01-09	1933-12-26
1934	1934-01-13	1934-12-20
1935	1935-01-01	1935-12-30
1936	1936-01-03	1936-12-17
1937	1937-01-01	1937-11-13
1938	1938-01-02	1938-12-27
1939	1939-01-14	1939-12-27
1940	1940-01-08	1940-12-28
1941	1941-01-03	1941-12-14
1942	1942-01-04	1942-12-30
1943	1943-01-19	1943-12-29
1944	1944-01-03	1944-12-28
1945	1945-01-02	1945-12-29
1946	1946-01-17	1946-12-31
1947	1947-01-01	1947-12-15

Every Fixed Threshold

Fixed thresholds at Richmond City Locks
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	54	48	1937	32
25 mm (0.98 in): Days with 25 mm or more rain	54	18	1908	10
50 mm (1.97 in): Days with 50 mm or more rain	50	5	1937	1
100 mm (3.94 in): Days with 100 mm or more rain	8	1	1910	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1936	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1936	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 Richmond City Locks 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).

Richmond City Locks Threshold Days by Year (USC00447196)

Key Facts for Richmond City Locks Thresholds

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

Every Fixed Threshold

Download the Data

Related