Bon Accord Dam Threshold Days by Year

4 fixed thresholds counted per year at Bon Accord Dam (SF005133370): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bon Accord Dam Thresholds

Bon Accord Dam: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1971 with 38.
Bon Accord Dam: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1971 with 15.
Bon Accord Dam: days with 50 mm (1.97 in) or more of precipitation in 55 years, most in 1936 with 5.
Bon Accord Dam: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1937 with 1.
4 fixed thresholds have at least one qualifying day at Bon Accord Dam.

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

67 years with a qualifying day

Days per year at Bon Accord Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1971.

Days with 10 mm (0.39 in) or more of precipitation per year at Bon Accord Dam
Year	Days	Decade average
1926	11	21.8
1927	19	21.8
1928	28	21.8
1929	29	21.8
1930	20	20.1
1931	22	20.1
1932	15	20.1
1933	21	20.1
1934	15	20.1
1935	9	20.1
1936	19	20.1
1937	20	20.1
1938	27	20.1
1939	33	20.1
1940	19	18.9
1943	19	18.9
1945	9	18.9
1946	17	18.9
1947	20	18.9
1948	21	18.9
1949	27	18.9
1950	18	23.9
1951	24	23.9
1952	23	23.9
1954	24	23.9
1955	26	23.9
1956	27	23.9
1957	21	23.9
1958	30	23.9
1959	22	23.9
1960	19	23
1961	20	23
1962	21	23
1963	24	23
1964	29	23
1965	16	23
1966	30	23
1967	27	23
1968	23	23
1969	21	23
1970	18	23.9
1971	38	23.9
1972	17	23.9
1973	29	23.9
1974	26	23.9
1975	25	23.9
1976	11	23.9
1977	23	23.9
1978	29	23.9
1979	23	23.9
1980	24	24.5
1981	22	24.5
1982	24	24.5
1983	28	24.5
1984	18	24.5
1985	25	24.5
1986	22	24.5
1987	34	24.5
1988	19	24.5
1989	29	24.5
1990	24	23.1
1991	26	23.1
1992	14	23.1
1993	28	23.1
1994	16	23.1
1995	32	23.1
1996	22	23.1

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

First to last qualifying date each year at Bon Accord Dam
Year	First date	Last date
1926	1926-01-18	1926-12-28
1927	1927-01-02	1927-12-17
1928	1928-01-05	1928-12-29
1929	1929-01-08	1929-12-19
1930	1930-02-10	1930-12-30
1931	1931-01-13	1931-12-04
1932	1932-01-06	1932-12-25
1933	1933-01-15	1933-12-31
1934	1934-01-02	1934-12-10
1935	1935-02-04	1935-12-28
1936	1936-01-14	1936-12-28
1937	1937-01-03	1937-12-30
1938	1938-01-12	1938-12-31
1939	1939-01-02	1939-12-26
1940	1940-01-15	1940-12-23
1943	1943-01-10	1943-12-28
1945	1945-02-01	1945-12-28
1946	1946-01-02	1946-12-22
1947	1947-01-11	1947-12-28
1948	1948-01-01	1948-11-29
1949	1949-01-12	1949-12-29
1950	1950-01-09	1950-12-30
1951	1951-01-17	1951-12-24
1952	1952-01-04	1952-12-30
1954	1954-01-02	1954-12-30
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-22
1957	1957-01-11	1957-12-03
1958	1958-01-11	1958-12-29
1959	1959-01-10	1959-12-17
1960	1960-02-21	1960-12-26
1961	1961-01-23	1961-12-26
1962	1962-01-09	1962-12-31
1963	1963-01-11	1963-12-11
1964	1964-01-05	1964-12-29
1965	1965-01-09	1965-12-21
1966	1966-01-21	1966-12-22
1967	1967-01-11	1967-12-20
1968	1968-01-07	1968-12-27
1969	1969-01-28	1969-12-24
1970	1970-01-25	1970-12-30
1971	1971-01-04	1971-12-30
1972	1972-01-02	1972-12-12
1973	1973-01-10	1973-12-23
1974	1974-01-05	1974-12-28
1975	1975-01-07	1975-12-15
1976	1976-01-15	1976-11-05
1977	1977-01-29	1977-12-19
1978	1978-01-01	1978-11-26
1979	1979-01-01	1979-12-27
1980	1980-01-07	1980-12-28
1981	1981-01-08	1981-12-16
1982	1982-01-01	1982-12-30
1983	1983-01-05	1983-12-17
1984	1984-01-09	1984-12-16
1985	1985-01-05	1985-12-31
1986	1986-01-03	1986-12-28
1987	1987-01-03	1987-12-27
1988	1988-01-07	1988-12-30
1989	1989-01-07	1989-12-29
1990	1990-02-10	1990-12-31
1991	1991-01-01	1991-12-26
1992	1992-01-15	1992-12-30
1993	1993-01-03	1993-12-30
1994	1994-01-12	1994-11-18
1995	1995-01-13	1995-12-30
1996	1996-01-03	1996-04-04

Every Fixed Threshold

Fixed thresholds at Bon Accord Dam
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	67	38	1971	22
25 mm (0.98 in): Days with 25 mm or more rain	67	15	1971	4
50 mm (1.97 in): Days with 50 mm or more rain	55	5	1936	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1937	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

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Data for Bon Accord 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Bon Accord Dam Threshold Days by Year

Key Facts for Bon Accord Dam Thresholds

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

Every Fixed Threshold

Download the Data

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