Hamilton Threshold Days by Year (USC00243885)

16 fixed thresholds counted per year at Hamilton (USC00243885): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton Thresholds

Hamilton: nights with a minimum temperature at or below 0 C (32 F) in 104 years, most in 2008 with 195.
Hamilton: nights with a minimum temperature at or below -10 C (14 F) in 104 years, most in 1993 with 63.
Hamilton: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1995 with 15.
Hamilton: days with a maximum temperature at or above 30 C (86 F) in 96 years, most in 1936 with 70.
16 fixed thresholds have at least one qualifying day at Hamilton.

Days at or above 30 C (86 F)

96 years with a qualifying day

Days per year at Hamilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 1936.

Days at or above 30 C (86 F) per year at Hamilton
Year	Days	Decade average
1899	28	28
1900	48	22.2
1903	16	22.2
1904	23	22.2
1907	6	22.2
1908	15	22.2
1909	25	22.2
1910	29	20
1911	10	20
1912	11	20
1913	18	20
1914	36	20
1916	16	20
1928	39	47.5
1929	56	47.5
1930	51	53.9
1931	66	53.9
1932	49	53.9
1933	53	53.9
1934	56	53.9
1935	52	53.9
1936	70	53.9
1937	50	53.9
1938	41	53.9
1939	51	53.9
1940	60	37.1
1941	36	37.1
1942	41	37.1
1943	29	37.1
1944	27	37.1
1945	51	37.1
1946	34	37.1
1947	32	37.1
1948	22	37.1
1949	39	37.1
1950	32	35.5
1951	34	35.5
1952	40	35.5
1953	44	35.5
1954	25	35.5
1955	36	35.5
1956	28	35.5
1957	36	35.5
1958	40	35.5
1959	40	35.5
1960	40	33.7
1961	53	33.7
1962	19	33.7
1963	21	33.7
1964	24	33.7
1965	14	33.7
1966	39	33.7
1967	58	33.7
1968	30	33.7
1969	39	33.7
1970	45	30.3
1971	39	30.3
1972	23	30.3
1973	37	30.3
1974	34	30.3
1975	21	30.3
1976	16	30.3
1977	31	30.3
1978	24	30.3
1979	33	30.3
1980	14	29
1981	39	29
1989	34	29
1990	42	35.6
1991	44	35.6
1992	38	35.6
1993	13	35.6
1994	45	35.6
1995	22	35.6
1996	41	35.6
1997	24	35.6
1998	50	35.6
1999	37	35.6
2000	45	47.7
2001	60	47.7
2002	31	47.7
2003	63	47.7
2007	52	47.7
2008	38	47.7
2009	45	47.7
2010	29	41.2
2011	41	41.2
2012	49	41.2
2013	64	41.2
2014	45	41.2
2015	46	41.2
2016	42	41.2
2018	30	41.2
2019	25	41.2
2020	32	42
2021	52	42

For each year, a bar from the first to the last day at Hamilton meeting 30 C (86 F).

First to last qualifying date each year at Hamilton
Year	First date	Last date
1899	1899-06-16	1899-09-27
1900	1900-06-10	1900-08-20
1903	1903-05-03	1903-09-23
1904	1904-06-15	1904-08-14
1907	1907-07-11	1907-08-07
1908	1908-07-04	1908-09-06
1909	1909-06-02	1909-08-30
1910	1910-04-24	1910-08-20
1911	1911-07-06	1911-08-19
1912	1912-06-20	1912-08-25
1913	1913-05-26	1913-09-04
1914	1914-05-31	1914-08-16
1916	1916-06-15	1916-09-01
1928	1928-05-21	1928-09-05
1929	1929-05-22	1929-09-01
1930	1930-06-06	1930-09-04
1931	1931-05-13	1931-09-07
1932	1932-05-12	1932-09-08
1933	1933-06-12	1933-09-06
1934	1934-05-15	1934-09-07
1935	1935-06-08	1935-09-14
1936	1936-04-17	1936-09-21
1937	1937-06-02	1937-09-17
1938	1938-07-09	1938-09-23
1939	1939-04-28	1939-09-10
1940	1940-05-10	1940-09-01
1941	1941-05-11	1941-08-17
1942	1942-06-30	1942-09-06
1943	1943-07-06	1943-09-14
1944	1944-06-24	1944-09-08
1945	1945-06-18	1945-09-14
1946	1946-04-25	1946-09-13
1947	1947-07-01	1947-09-04
1948	1948-06-07	1948-09-14
1949	1949-05-26	1949-09-02
1950	1950-06-29	1950-09-05
1951	1951-07-03	1951-09-07
1952	1952-07-03	1952-10-02
1953	1953-06-11	1953-09-16
1954	1954-05-18	1954-08-29
1955	1955-06-20	1955-09-06
1956	1956-05-31	1956-09-09
1957	1957-06-01	1957-09-27
1958	1958-05-20	1958-09-09
1959	1959-06-02	1959-09-11
1960	1960-06-24	1960-09-19
1961	1961-06-15	1961-08-24
1962	1962-06-24	1962-09-06
1963	1963-06-18	1963-09-30
1964	1964-05-19	1964-08-17
1965	1965-06-11	1965-08-11
1966	1966-05-03	1966-09-06
1967	1967-06-29	1967-09-28
1968	1968-06-18	1968-09-10
1969	1969-06-04	1969-09-03
1970	1970-06-03	1970-08-28
1971	1971-06-22	1971-08-29
1972	1972-05-30	1972-08-29
1973	1973-06-21	1973-09-06
1974	1974-06-12	1974-08-06
1975	1975-07-03	1975-08-06
1976	1976-06-29	1976-09-05
1977	1977-06-06	1977-09-07
1978	1978-06-28	1978-09-05
1979	1979-06-11	1979-09-21
1980	1980-05-21	1980-09-05
1981	1981-06-26	1981-09-19
1989	1989-06-13	1989-09-16
1990	1990-06-22	1990-09-12
1991	1991-07-03	1991-09-06
1992	1992-05-06	1992-09-03
1993	1993-05-11	1993-09-10
1994	1994-06-20	1994-09-07
1995	1995-06-26	1995-09-04
1996	1996-06-07	1996-09-12
1997	1997-05-15	1997-09-01
1998	1998-07-09	1998-09-17
1999	1999-05-24	1999-08-30
2000	2000-06-04	2000-09-16
2001	2001-05-12	2001-10-01
2002	2002-05-19	2002-09-15
2003	2003-05-24	2003-09-27
2007	2007-05-17	2007-09-11
2008	2008-05-17	2008-08-26
2009	2009-05-19	2009-09-25
2010	2010-05-18	2010-09-29
2011	2011-06-23	2011-09-25
2012	2012-04-23	2012-08-28
2013	2013-05-13	2013-09-17
2014	2014-07-02	2014-09-25
2015	2015-06-08	2015-09-26
2016	2016-06-06	2016-08-30
2018	2018-07-06	2018-09-08
2019	2019-07-11	2019-09-05
2020	2020-06-02	2020-09-07
2021	2021-06-03	2021-09-09

Every Fixed Threshold

Fixed thresholds at Hamilton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	96	70	1936	52
35 C (95 F): Days	77	22	1931	11
90 F (32.2 C): Days	96	47	1936	32
100 F (37.8 C): Days	23	6	2003	2
0 C (32 F): Ice days (max	96	59	1955	24
0 C (32 F): Frost days (min	104	195	2008	179
-10 C (14 F): Days with min	104	63	1993	23
-20 C (-4 F): Days with min	94	22	1916	2
-30 C (-22 F): Days with min	34	8	1916	1
20 C (68 F): Tropical nights (min	4	2	1910	1
25 C (77 F): Days with min	1	1	1903	1
10 mm (0.39 in): Days with 10 mm or more rain	104	15	1995	7
25 mm (0.98 in): Days with 25 mm or more rain	46	4	1938	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	8	1955	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

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 (USC00243885)

Key Facts for Hamilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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