Stony River Dam Threshold Days by Year (USC00468536)

12 fixed thresholds counted per year at Stony River Dam (USC00468536): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Stony River Dam Thresholds

Stony River Dam: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1956 with 48.
Stony River Dam: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1944 with 13.
Stony River Dam: days with 10 cm (3.9 in) or more of snowfall in 33 years, most in 1961 with 12.
Stony River Dam: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1920 with 2.
12 fixed thresholds have at least one qualifying day at Stony River Dam.

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

42 years with a qualifying day

Days per year at Stony River Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1956.

Days with 10 mm (0.39 in) or more of precipitation per year at Stony River Dam
Year	Days	Decade average
1920	39	38.4
1921	40	38.4
1922	31	38.4
1923	30	38.4
1924	40	38.4
1925	35	38.4
1926	42	38.4
1927	42	38.4
1929	47	38.4
1930	19	33.8
1931	33	33.8
1932	41	33.8
1935	47	33.8
1936	29	33.8
1938	34	33.8
1940	38	39
1941	26	39
1942	39	39
1943	29	39
1944	45	39
1945	44	39
1947	33	39
1948	51	39
1949	46	39
1950	42	38.8
1951	37	38.8
1952	37	38.8
1953	32	38.8
1954	43	38.8
1955	43	38.8
1956	48	38.8
1957	36	38.8
1959	31	38.8
1960	33	36.3
1961	45	36.3
1964	43	36.3
1965	28	36.3
1966	39	36.3
1967	39	36.3
1968	30	36.3
1969	33	36.3
1970	36	36

For each year, a bar from the first to the last day at Stony River Dam meeting 10 mm (0.39 in).

First to last qualifying date each year at Stony River Dam
Year	First date	Last date
1920	1920-01-08	1920-12-23
1921	1921-01-08	1921-12-24
1922	1922-01-11	1922-12-17
1923	1923-01-24	1923-12-31
1924	1924-01-03	1924-12-06
1925	1925-01-11	1925-12-22
1926	1926-01-05	1926-12-26
1927	1927-01-21	1927-12-13
1929	1929-01-10	1929-12-28
1930	1930-02-05	1930-12-27
1931	1931-01-06	1931-12-14
1932	1932-01-06	1932-12-12
1935	1935-01-16	1935-12-30
1936	1936-01-19	1936-12-19
1938	1938-01-25	1938-12-27
1940	1940-02-19	1940-11-27
1941	1941-01-27	1941-12-24
1942	1942-01-04	1942-12-30
1943	1943-01-18	1943-12-29
1944	1944-01-03	1944-12-28
1945	1945-01-01	1945-12-20
1947	1947-01-01	1947-12-08
1948	1948-01-02	1948-12-30
1949	1949-01-06	1949-12-27
1950	1950-01-30	1950-12-16
1951	1951-01-04	1951-12-31
1952	1952-01-03	1952-12-11
1953	1953-02-07	1953-12-16
1954	1954-01-11	1954-12-30
1955	1955-01-14	1955-12-03
1956	1956-01-29	1956-12-24
1957	1957-01-01	1957-12-26
1959	1959-01-15	1959-12-29
1960	1960-01-03	1960-12-12
1961	1961-01-16	1961-12-28
1964	1964-01-07	1964-12-27
1965	1965-01-03	1965-12-11
1966	1966-01-02	1966-12-14
1967	1967-01-27	1967-12-03
1968	1968-01-14	1968-12-08
1969	1969-01-21	1969-12-31
1970	1970-01-07	1970-12-22

Every Fixed Threshold

Fixed thresholds at Stony River Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	2	5	1920	1
90 F (32.2 C): Days	1	1	1920	1
0 C (32 F): Ice days (max	2	47	1921	47
0 C (32 F): Frost days (min	2	110	1921	110
-10 C (14 F): Days with min	2	29	1920	15
20 C (68 F): Tropical nights (min	2	13	1921	13
10 mm (0.39 in): Days with 10 mm or more rain	42	48	1956	36
25 mm (0.98 in): Days with 25 mm or more rain	42	13	1944	8
50 mm (1.97 in): Days with 50 mm or more rain	27	2	1920	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1949	1
10 cm (3.9 in): Days with 10 cm or more snowfall	33	12	1961	6
25 cm (9.8 in): Days with 25 cm or more snowfall	15	3	1960	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for Stony River Dam 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).

Stony River Dam Threshold Days by Year (USC00468536)

Key Facts for Stony River Dam Thresholds

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

Every Fixed Threshold

Download the Data

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