Hamamatsu Threshold Days by Year (JA000047654)

12 fixed thresholds counted per year at Hamamatsu (JA000047654): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamamatsu Thresholds

Hamamatsu: days with a maximum temperature at or above 30 C (86 F) in 69 years, most in 2025 with 84.
Hamamatsu: days with a maximum temperature at or above 90 F (32.2 C) in 68 years, most in 2025 with 51.
Hamamatsu: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1954 with 70.
Hamamatsu: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1974 with 33.
12 fixed thresholds have at least one qualifying day at Hamamatsu.

Days at or above 30 C (86 F)

69 years with a qualifying day

Days per year at Hamamatsu with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 84 in 2025.

Days at or above 30 C (86 F) per year at Hamamatsu
Year	Days	Decade average
1951	26	27.4
1952	30	27.4
1953	29	27.4
1954	26	27.4
1955	39	27.4
1956	25	27.4
1957	19	27.4
1958	22	27.4
1959	31	27.4
1960	35	33.5
1961	56	33.5
1962	32	33.5
1963	28	33.5
1964	35	33.5
1965	30	33.5
1966	31	33.5
1967	46	33.5
1968	16	33.5
1969	26	33.5
1970	28	35
1971	36	35
1972	23	35
1973	37	35
1974	27	35
1975	38	35
1976	18	35
1977	39	35
1978	65	35
1979	39	35
1980	23	37
1981	36	37
1982	15	37
1983	45	37
1984	53	37
1985	51	37
1986	40	37
1987	44	37
1988	26	37
1989	37	37
1992	46	48.4
1993	20	48.4
1994	68	48.4
1995	51	48.4
1996	41	48.4
1998	54	48.4
1999	59	48.4
2000	61	54.4
2002	58	54.4
2003	44	54.4
2004	59	54.4
2005	59	54.4
2006	49	54.4
2007	56	54.4
2008	59	54.4
2009	45	54.4
2010	73	62.2
2011	70	62.2
2012	69	62.2
2013	70	62.2
2014	46	62.2
2015	42	62.2
2016	70	62.2
2017	62	62.2
2018	70	62.2
2019	50	62.2
2021	57	66.5
2022	68	66.5
2025	84	66.5
2026	57	66.5

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

First to last qualifying date each year at Hamamatsu
Year	First date	Last date
1951	1951-07-28	1951-09-01
1952	1952-07-28	1952-09-14
1953	1953-07-08	1953-09-15
1954	1954-08-02	1954-09-19
1955	1955-06-26	1955-09-16
1956	1956-06-06	1956-09-08
1957	1957-07-05	1957-09-01
1958	1958-06-30	1958-09-12
1959	1959-07-03	1959-09-19
1960	1960-07-05	1960-09-24
1961	1961-07-07	1961-10-02
1962	1962-07-12	1962-09-21
1963	1963-07-03	1963-09-04
1964	1964-07-03	1964-09-15
1965	1965-07-09	1965-08-25
1966	1966-07-02	1966-09-13
1967	1967-07-14	1967-09-17
1968	1968-07-22	1968-08-22
1969	1969-07-27	1969-09-16
1970	1970-07-12	1970-09-15
1971	1971-06-28	1971-09-20
1972	1972-06-10	1972-09-10
1973	1973-07-08	1973-09-04
1974	1974-07-19	1974-09-05
1975	1975-07-17	1975-09-22
1976	1976-07-29	1976-09-11
1977	1977-06-03	1977-09-20
1978	1978-06-27	1978-09-19
1979	1979-05-29	1979-09-23
1980	1980-06-05	1980-09-11
1981	1981-06-29	1981-09-02
1982	1982-06-12	1982-09-03
1983	1983-07-19	1983-09-13
1984	1984-06-27	1984-09-10
1985	1985-07-06	1985-09-20
1986	1986-07-18	1986-09-11
1987	1987-06-05	1987-09-17
1988	1988-07-08	1988-09-16
1989	1989-06-26	1989-09-16
1992	1992-07-01	1992-09-17
1993	1993-06-16	1993-08-31
1994	1994-06-14	1994-09-29
1995	1995-07-09	1995-09-25
1996	1996-06-16	1996-09-02
1998	1998-06-28	1998-09-20
1999	1999-07-15	1999-10-14
2000	2000-05-09	2000-09-20
2002	2002-06-02	2002-09-13
2003	2003-06-21	2003-09-19
2004	2004-06-22	2004-09-23
2005	2005-06-12	2005-09-25
2006	2006-06-01	2006-09-11
2007	2007-06-15	2007-09-28
2008	2008-07-04	2008-09-20
2009	2009-06-23	2009-09-11
2010	2010-06-16	2010-09-22
2011	2011-06-22	2011-09-19
2012	2012-06-18	2012-10-04
2013	2013-05-23	2013-10-10
2014	2014-06-12	2014-09-30
2015	2015-05-26	2015-09-11
2016	2016-06-17	2016-10-04
2017	2017-06-16	2017-10-10
2018	2018-06-09	2018-10-07
2019	2019-05-24	2019-10-13
2021	2021-06-08	2021-10-12
2022	2022-05-29	2022-09-27
2025	2025-06-15	2025-10-13
2026	2026-05-29	2026-10-06

Every Fixed Threshold

Fixed thresholds at Hamamatsu
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	69	84	2025	57
35 C (95 F): Days	45	16	2013	9
90 F (32.2 C): Days	68	51	2025	27
100 F (37.8 C): Days	7	4	2013	2
0 C (32 F): Frost days (min	41	43	1984	7
20 C (68 F): Tropical nights (min	41	127	2025	111
25 C (77 F): Days with min	40	64	2025	49
10 mm (0.39 in): Days with 10 mm or more rain	54	70	1954	37
25 mm (0.98 in): Days with 25 mm or more rain	54	33	1974	26
50 mm (1.97 in): Days with 50 mm or more rain	54	16	1968	19
100 mm (3.94 in): Days with 100 mm or more rain	45	6	1972	14
200 mm (7.87 in): Days with 200 mm or more rain	7	1	1966	6

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

Data for Hamamatsu 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).

Hamamatsu Threshold Days by Year (JA000047654)

Key Facts for Hamamatsu Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related