Hamilton Threshold Days by Year (USC00013645)

17 fixed thresholds counted per year at Hamilton (USC00013645): 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 63 years, most in 2019 with 65.
Hamilton: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 2019 with 30.
Hamilton: days with a maximum temperature at or above 30 C (86 F) in 62 years, most in 2007 with 153.
Hamilton: days with a maximum temperature at or above 90 F (32.2 C) in 62 years, most in 2016 with 113.
17 fixed thresholds have at least one qualifying day at Hamilton.

Days at or above 30 C (86 F)

62 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 153 in 2007.

Days at or above 30 C (86 F) per year at Hamilton
Year	Days	Decade average
1962	138	107.8
1963	117	107.8
1964	109	107.8
1965	121	107.8
1966	92	107.8
1967	78	107.8
1968	100	107.8
1969	107	107.8
1970	113	99
1971	105	99
1972	100	99
1973	103	99
1974	80	99
1975	94	99
1976	77	99
1977	122	99
1978	114	99
1979	82	99
1980	119	112.7
1981	111	112.7
1982	113	112.7
1983	94	112.7
1984	122	112.7
1985	108	112.7
1986	133	112.7
1987	133	112.7
1988	110	112.7
1989	84	112.7
1990	123	114.2
1991	114	114.2
1992	99	114.2
1993	108	114.2
1994	96	114.2
1995	112	114.2
1996	113	114.2
1997	98	114.2
1998	141	114.2
1999	138	114.2
2000	144	123.7
2001	109	123.7
2002	130	123.7
2003	112	123.7
2005	128	123.7
2006	132	123.7
2007	153	123.7
2008	105	123.7
2009	100	123.7
2010	146	121.3
2011	123	121.3
2012	115	121.3
2013	99	121.3
2014	103	121.3
2015	98	121.3
2016	150	121.3
2017	112	121.3
2018	136	121.3
2019	131	121.3
2020	95	94
2023	82	94
2024	92	94
2025	88	94
2026	113	94

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
1962	1962-04-30	1962-10-20
1963	1963-04-01	1963-10-28
1964	1964-04-20	1964-09-24
1965	1965-04-10	1965-10-18
1966	1966-05-08	1966-09-27
1967	1967-03-13	1967-10-07
1968	1968-04-20	1968-10-14
1969	1969-05-08	1969-10-13
1970	1970-04-23	1970-10-03
1971	1971-04-20	1971-10-17
1972	1972-04-15	1972-10-15
1973	1973-05-11	1973-10-11
1974	1974-05-11	1974-09-21
1975	1975-04-28	1975-10-15
1976	1976-06-09	1976-10-05
1977	1977-04-12	1977-10-02
1978	1978-04-01	1978-10-13
1979	1979-05-08	1979-09-13
1980	1980-04-23	1980-10-11
1981	1981-04-01	1981-10-18
1982	1982-03-19	1982-10-10
1983	1983-05-14	1983-10-04
1984	1984-04-26	1984-11-01
1985	1985-04-18	1985-10-14
1986	1986-04-03	1986-10-05
1987	1987-03-27	1987-11-02
1988	1988-04-05	1988-09-25
1989	1989-04-23	1989-10-07
1990	1990-03-14	1990-10-17
1991	1991-03-27	1991-10-29
1992	1992-04-14	1992-09-23
1993	1993-05-06	1993-10-07
1994	1994-04-11	1994-10-02
1995	1995-03-24	1995-10-03
1996	1996-02-24	1996-09-26
1997	1997-03-29	1997-10-13
1998	1998-03-30	1998-11-02
1999	1999-04-03	1999-10-17
2000	2000-04-20	2000-11-02
2001	2001-04-10	2001-09-24
2002	2002-04-18	2002-10-07
2003	2003-04-14	2003-10-25
2005	2005-03-27	2005-10-21
2006	2006-03-13	2006-10-06
2007	2007-03-25	2007-10-18
2008	2008-04-23	2008-10-15
2009	2009-04-24	2009-10-10
2010	2010-04-05	2010-10-27
2011	2011-03-21	2011-10-27
2012	2012-03-16	2012-09-29
2013	2013-04-11	2013-10-06
2014	2014-04-25	2014-10-28
2015	2015-05-08	2015-10-16
2016	2016-03-16	2016-11-03
2017	2017-03-21	2017-10-16
2018	2018-04-04	2018-10-09
2019	2019-04-11	2019-10-07
2020	2020-03-27	2020-09-18
2023	2023-04-05	2023-10-03
2024	2024-05-03	2024-10-07
2025	2025-04-04	2025-09-24
2026	2026-04-17	2026-10-15

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	62	153	2007	113
35 C (95 F): Days	60	61	2016	27
40 C (104 F): Days	9	7	2007	1
90 F (32.2 C): Days	62	113	2016	84
100 F (37.8 C): Days	29	24	2006	1
0 C (32 F): Ice days (max	50	11	1996	2
0 C (32 F): Frost days (min	61	125	1981	33
-10 C (14 F): Days with min	58	29	1985	4
-20 C (-4 F): Days with min	5	3	1962	2
20 C (68 F): Tropical nights (min	61	74	2010	88
10 mm (0.39 in): Days with 10 mm or more rain	63	65	2019	37
25 mm (0.98 in): Days with 25 mm or more rain	63	30	2019	17
50 mm (1.97 in): Days with 50 mm or more rain	62	12	1991	3
100 mm (3.94 in): Days with 100 mm or more rain	23	2	1983	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	7	1	1962	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Hamilton Threshold Days by Year (USC00013645)

Key Facts for Hamilton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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