Hamilton Threshold Days by Year

18 fixed thresholds counted per year at Hamilton (CA006153192): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton Thresholds

Hamilton: days with a maximum temperature at or above 30 C (86 F) in 56 years, most in 1955 with 48.
Hamilton: days with a maximum temperature at or below 0 C (32 F) in 56 years, most in 1917 with 79.
Hamilton: nights with a minimum temperature at or below 0 C (32 F) in 56 years, most in 1885 with 186.
Hamilton: nights with a minimum temperature at or below -10 C (14 F) in 56 years, most in 1883 with 73.
18 fixed thresholds have at least one qualifying day at Hamilton.

Days at or above 30 C (86 F)

56 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 48 in 1955.

Days at or above 30 C (86 F) per year at Hamilton
Year	Days	Decade average
1872	30	32.3
1877	45	32.3
1878	20	32.3
1879	34	32.3
1880	34	23.5
1881	45	23.5
1882	11	23.5
1883	6	23.5
1884	28	23.5
1885	15	23.5
1886	20	23.5
1887	29	23.5
1898	32	27.5
1899	23	27.5
1900	22	20.5
1902	11	20.5
1908	27	20.5
1909	22	20.5
1910	18	21.5
1911	32	21.5
1912	13	21.5
1913	20	21.5
1914	19	21.5
1915	10	21.5
1916	32	21.5
1917	12	21.5
1918	27	21.5
1919	32	21.5
1920	17	20.1
1921	35	20.1
1922	26	20.1
1923	21	20.1
1924	13	20.1
1926	9	20.1
1927	10	20.1
1928	22	20.1
1929	28	20.1
1939	25	25
1940	23	28.9
1941	37	28.9
1942	9	28.9
1943	33	28.9
1944	37	28.9
1945	25	28.9
1946	23	28.9
1947	30	28.9
1948	33	28.9
1949	39	28.9
1950	21	29
1951	19	29
1952	39	29
1953	32	29
1954	27	29
1955	48	29
1956	18	29
1957	28	29

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
1872	1872-06-19	1872-09-08
1877	1877-05-18	1877-10-01
1878	1878-06-27	1878-08-15
1879	1879-05-13	1879-09-01
1880	1880-05-17	1880-09-18
1881	1881-05-09	1881-10-03
1882	1882-06-07	1882-09-19
1883	1883-06-18	1883-08-22
1884	1884-06-17	1884-10-04
1885	1885-06-07	1885-09-27
1886	1886-05-22	1886-09-25
1887	1887-05-20	1887-09-13
1898	1898-06-11	1898-09-04
1899	1899-06-05	1899-09-17
1900	1900-05-14	1900-10-06
1902	1902-05-22	1902-08-31
1908	1908-05-28	1908-09-11
1909	1909-06-21	1909-09-14
1910	1910-06-15	1910-07-24
1911	1911-05-18	1911-08-22
1912	1912-06-25	1912-09-10
1913	1913-05-02	1913-09-02
1914	1914-05-20	1914-09-22
1915	1915-04-25	1915-09-15
1916	1916-07-02	1916-09-07
1917	1917-06-19	1917-08-20
1918	1918-05-18	1918-08-25
1919	1919-05-29	1919-09-08
1920	1920-05-27	1920-08-08
1921	1921-05-21	1921-09-03
1922	1922-05-31	1922-09-10
1923	1923-06-01	1923-08-07
1924	1924-06-22	1924-08-31
1926	1926-05-31	1926-08-13
1927	1927-05-22	1927-09-15
1928	1928-05-04	1928-09-11
1929	1929-05-29	1929-09-04
1939	1939-05-06	1939-09-16
1940	1940-06-03	1940-09-20
1941	1941-05-20	1941-09-22
1942	1942-05-30	1942-09-17
1943	1943-06-03	1943-09-01
1944	1944-05-26	1944-09-20
1945	1945-06-14	1945-09-09
1946	1946-06-11	1946-10-07
1947	1947-06-11	1947-09-11
1948	1948-06-01	1948-09-19
1949	1949-05-04	1949-08-27
1950	1950-06-07	1950-08-28
1951	1951-05-15	1951-10-05
1952	1952-06-06	1952-09-14
1953	1953-05-10	1953-09-04
1954	1954-06-10	1954-09-07
1955	1955-05-04	1955-09-19
1956	1956-05-30	1956-08-17
1957	1957-06-14	1957-08-17

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	56	48	1955	28
35 C (95 F): Days	41	15	1955	5
90 F (32.2 C): Days	55	31	1955	19
100 F (37.8 C): Days	11	4	1948	2
0 C (32 F): Ice days (max	56	79	1917	32
0 C (32 F): Frost days (min	56	186	1885	125
-10 C (14 F): Days with min	56	73	1883	27
-20 C (-4 F): Days with min	35	18	1885	2
-30 C (-22 F): Days with min	1	1	1884	1
20 C (68 F): Tropical nights (min	53	30	1921	11
25 C (77 F): Days with min	9	2	1916	2
10 mm (0.39 in): Days with 10 mm or more rain	38	39	1878	29
25 mm (0.98 in): Days with 25 mm or more rain	38	10	1900	10
50 mm (1.97 in): Days with 50 mm or more rain	15	3	1878	1
100 mm (3.94 in): Days with 100 mm or more rain	1	0	n/a	1
10 cm (3.9 in): Days with 10 cm or more snowfall	48	10	1883	4
25 cm (9.8 in): Days with 25 cm or more snowfall	17	4	1900	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1872.

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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Hamilton Threshold Days by Year

Key Facts for Hamilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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