Hamilton Threshold Days by Year (USC00413884)

16 fixed thresholds counted per year at Hamilton (USC00413884): 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 45 years, most in 1986 with 37.
Hamilton: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1979 with 16.
Hamilton: days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1916 with 5.
Hamilton: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1963 with 181.
16 fixed thresholds have at least one qualifying day at Hamilton.

Days at or above 30 C (86 F)

30 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 181 in 1963.

Days at or above 30 C (86 F) per year at Hamilton
Year	Days	Decade average
1963	181	134.3
1964	123	134.3
1965	129	134.3
1966	120	134.3
1967	152	134.3
1968	114	134.3
1969	121	134.3
1970	105	124.8
1972	142	124.8
1976	105	124.8
1977	139	124.8
1978	142	124.8
1979	116	124.8
1980	116	122.3
1981	130	122.3
1982	137	122.3
1983	121	122.3
1984	144	122.3
1985	128	122.3
1986	113	122.3
1987	114	122.3
1988	118	122.3
1989	102	122.3
2002	121	118
2003	105	118
2004	88	118
2005	131	118
2006	145	118
2012	138	128.5
2013	119	128.5

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
1963	1963-02-01	1963-11-07
1964	1964-04-04	1964-10-17
1965	1965-04-04	1965-11-27
1966	1966-04-01	1966-10-15
1967	1967-03-04	1967-10-27
1968	1968-04-18	1968-10-31
1969	1969-01-09	1969-10-12
1970	1970-05-11	1970-10-08
1972	1972-02-26	1972-10-19
1976	1976-02-10	1976-10-04
1977	1977-05-22	1977-11-01
1978	1978-04-05	1978-10-22
1979	1979-04-26	1979-10-22
1980	1980-04-07	1980-11-10
1981	1981-04-20	1981-10-17
1982	1982-03-11	1982-11-01
1983	1983-03-02	1983-11-15
1984	1984-03-28	1984-10-19
1985	1985-03-11	1985-10-23
1986	1986-02-19	1986-10-03
1987	1987-04-11	1987-11-04
1988	1988-05-09	1988-11-08
1989	1989-03-13	1989-11-15
2002	2002-04-24	2002-11-09
2003	2003-04-20	2003-10-23
2004	2004-05-26	2004-10-21
2005	2005-04-28	2005-12-04
2006	2006-01-02	2006-11-10
2012	2012-03-31	2012-11-02
2013	2013-03-05	2013-10-05

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	30	181	1963	119
35 C (95 F): Days	30	81	1963	39
40 C (104 F): Days	14	14	1964	1
90 F (32.2 C): Days	30	140	1963	100
100 F (37.8 C): Days	28	38	1963	10
0 C (32 F): Ice days (max	26	12	1978	3
0 C (32 F): Frost days (min	22	73	1978	68
-10 C (14 F): Days with min	12	11	1963	1
20 C (68 F): Tropical nights (min	22	103	1977	92
25 C (77 F): Days with min	8	4	1969	1
10 mm (0.39 in): Days with 10 mm or more rain	45	37	1986	22
25 mm (0.98 in): Days with 25 mm or more rain	45	16	1979	11
50 mm (1.97 in): Days with 50 mm or more rain	40	5	1916	4
100 mm (3.94 in): Days with 100 mm or more rain	9	2	1957	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1959	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	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 1963.

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 (USC00413884)

Key Facts for Hamilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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