Hamilton Threshold Days by Year (USC00333478)

6 fixed thresholds counted per year at Hamilton (USC00333478): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton Thresholds

Hamilton: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1926 with 48.
Hamilton: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1933 with 14.
Hamilton: days with 50 mm (1.97 in) or more of precipitation in 36 years, most in 1947 with 4.
Hamilton: days with 10 cm (3.9 in) or more of snowfall in 18 years, most in 1958 with 4.
6 fixed thresholds have at least one qualifying day at Hamilton.

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

48 years with a qualifying day

Days per year at Hamilton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1926.

Days with 10 mm (0.39 in) or more of precipitation per year at Hamilton
Year	Days	Decade average
1912	36	36
1920	34	36.2
1921	37	36.2
1923	38	36.2
1924	21	36.2
1925	33	36.2
1926	48	36.2
1927	38	36.2
1928	31	36.2
1929	46	36.2
1931	33	33
1933	35	33
1934	23	33
1935	32	33
1936	30	33
1937	39	33
1938	34	33
1939	38	33
1940	34	33.7
1941	25	33.7
1942	32	33.7
1943	30	33.7
1944	30	33.7
1945	46	33.7
1946	34	33.7
1947	42	33.7
1948	30	33.7
1950	48	34.4
1951	37	34.4
1952	31	34.4
1953	23	34.4
1954	32	34.4
1955	40	34.4
1956	29	34.4
1957	35	34.4
1958	45	34.4
1959	24	34.4
1960	25	31.4
1961	41	31.4
1962	32	31.4
1963	20	31.4
1964	34	31.4
1965	30	31.4
1966	31	31.4
1967	30	31.4
1968	39	31.4
1969	32	31.4
1970	39	39

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

First to last qualifying date each year at Hamilton
Year	First date	Last date
1912	1912-01-18	1912-12-30
1920	1920-01-08	1920-12-14
1921	1921-01-08	1921-12-24
1923	1923-01-08	1923-12-28
1924	1924-01-03	1924-12-18
1925	1925-01-20	1925-11-27
1926	1926-01-09	1926-12-26
1927	1927-01-19	1927-12-29
1928	1928-01-08	1928-12-18
1929	1929-01-01	1929-12-19
1931	1931-01-05	1931-12-24
1933	1933-01-22	1933-12-20
1934	1934-01-05	1934-12-26
1935	1935-01-16	1935-12-08
1936	1936-02-13	1936-12-31
1937	1937-01-07	1937-12-28
1938	1938-01-31	1938-12-27
1939	1939-01-05	1939-12-27
1940	1940-01-14	1940-12-29
1941	1941-01-02	1941-12-24
1942	1942-01-02	1942-12-30
1943	1943-02-01	1943-12-29
1944	1944-01-03	1944-12-26
1945	1945-01-01	1945-12-25
1946	1946-01-09	1946-12-29
1947	1947-01-02	1947-11-11
1948	1948-01-01	1948-12-16
1950	1950-01-04	1950-12-07
1951	1951-01-03	1951-12-26
1952	1952-01-05	1952-12-10
1953	1953-01-08	1953-12-06
1954	1954-01-16	1954-12-29
1955	1955-01-04	1955-12-02
1956	1956-01-19	1956-12-21
1957	1957-01-10	1957-12-26
1958	1958-01-14	1958-12-05
1959	1959-01-01	1959-12-13
1960	1960-01-15	1960-12-21
1961	1961-01-15	1961-12-17
1962	1962-01-15	1962-12-29
1963	1963-01-11	1963-09-13
1964	1964-01-01	1964-12-25
1965	1965-01-02	1965-11-27
1966	1966-01-01	1966-12-28
1967	1967-02-02	1967-12-22
1968	1968-01-30	1968-12-28
1969	1969-01-18	1969-12-30
1970	1970-01-29	1970-12-22

Every Fixed Threshold

Fixed thresholds at Hamilton
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	48	48	1926	39
25 mm (0.98 in): Days with 25 mm or more rain	48	14	1933	7
50 mm (1.97 in): Days with 50 mm or more rain	36	4	1947	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1920	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	4	1958	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1968	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

Data for Hamilton 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).

Hamilton Threshold Days by Year (USC00333478)

Key Facts for Hamilton Thresholds

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

Every Fixed Threshold

Download the Data

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