Hamilton Threshold Days by Year (USC00303602)

16 fixed thresholds counted per year at Hamilton (USC00303602): 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 20 years, most in 1955 with 52.
Hamilton: days with a maximum temperature at or below 0 C (32 F) in 20 years, most in 1958 with 67.
Hamilton: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1956 with 187.
Hamilton: nights with a minimum temperature at or below -10 C (14 F) in 20 years, most in 1895 with 80.
16 fixed thresholds have at least one qualifying day at Hamilton.

Days at or above 30 C (86 F)

20 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 52 in 1955.

Days at or above 30 C (86 F) per year at Hamilton
Year	Days	Decade average
1895	30	30
1937	26	24
1938	21	24
1939	25	24
1940	13	20.2
1941	24	20.2
1942	9	20.2
1944	39	20.2
1948	10	20.2
1949	26	20.2
1950	7	20.3
1951	2	20.3
1952	39	20.3
1953	33	20.3
1954	18	20.3
1955	52	20.3
1956	11	20.3
1957	12	20.3
1958	7	20.3
1959	22	20.3

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
1895	1895-05-05	1895-09-23
1937	1937-05-31	1937-09-03
1938	1938-06-11	1938-08-21
1939	1939-05-27	1939-09-16
1940	1940-07-19	1940-08-17
1941	1941-04-20	1941-10-05
1942	1942-06-13	1942-09-17
1944	1944-05-04	1944-08-17
1948	1948-07-10	1948-09-13
1949	1949-06-12	1949-08-28
1950	1950-06-08	1950-08-17
1951	1951-07-11	1951-08-31
1952	1952-06-03	1952-09-15
1953	1953-06-09	1953-09-30
1954	1954-04-21	1954-09-07
1955	1955-05-04	1955-09-19
1956	1956-06-12	1956-09-05
1957	1957-06-13	1957-09-22
1958	1958-07-01	1958-08-07
1959	1959-06-11	1959-09-24

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	20	52	1955	22
35 C (95 F): Days	6	4	1944	1
90 F (32.2 C): Days	16	25	1955	4
100 F (37.8 C): Days	1	2	1952	2
0 C (32 F): Ice days (max	20	67	1958	49
0 C (32 F): Frost days (min	20	187	1956	141
-10 C (14 F): Days with min	20	80	1895	49
-20 C (-4 F): Days with min	20	20	1940	4
-30 C (-22 F): Days with min	7	2	1948	2
20 C (68 F): Tropical nights (min	14	27	1937	4
25 C (77 F): Days with min	2	3	1937	1
10 mm (0.39 in): Days with 10 mm or more rain	20	38	1950	32
25 mm (0.98 in): Days with 25 mm or more rain	20	9	1950	2
50 mm (1.97 in): Days with 50 mm or more rain	10	3	1950	1
10 cm (3.9 in): Days with 10 cm or more snowfall	13	13	1956	4
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

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 (USC00303602)

Key Facts for Hamilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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