Hiroshima Threshold Days by Year (JA000047765)

13 fixed thresholds counted per year at Hiroshima (JA000047765): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hiroshima Thresholds

Hiroshima: days with a maximum temperature at or above 30 C (86 F) in 64 years, most in 1994 with 80.
Hiroshima: days with a maximum temperature at or above 90 F (32.2 C) in 63 years, most in 1994 with 70.
Hiroshima: days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1972 with 62.
Hiroshima: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 2016 with 31.
13 fixed thresholds have at least one qualifying day at Hiroshima.

Days at or above 30 C (86 F)

64 years with a qualifying day

Days per year at Hiroshima with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 80 in 1994.

Days at or above 30 C (86 F) per year at Hiroshima
Year	Days	Decade average
1951	36	39.6
1952	43	39.6
1953	37	39.6
1954	35	39.6
1955	45	39.6
1956	42	39.6
1957	32	39.6
1958	46	39.6
1959	40	39.6
1960	50	49.4
1961	70	49.4
1962	45	49.4
1963	37	49.4
1964	62	49.4
1965	34	49.4
1966	54	49.4
1967	59	49.4
1968	34	49.4
1969	49	49.4
1970	52	43.4
1971	39	43.4
1972	33	43.4
1973	54	43.4
1974	28	43.4
1975	51	43.4
1976	32	43.4
1977	43	43.4
1978	63	43.4
1979	39	43.4
1980	6	41.6
1981	40	41.6
1982	27	41.6
1983	39	41.6
1984	55	41.6
1985	56	41.6
1986	43	41.6
1987	34	41.6
1988	59	41.6
1989	57	41.6
1990	73	60.6
1991	59	60.6
1992	51	60.6
1993	35	60.6
1994	80	60.6
1996	61	60.6
1997	59	60.6
1998	73	60.6
1999	54	60.6
2000	70	65
2002	74	65
2003	46	65
2004	68	65
2006	55	65
2007	74	65
2008	73	65
2009	60	65
2010	79	67
2011	70	67
2012	71	67
2016	60	67
2018	62	67
2019	60	67
2025	80	75
2026	70	75

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

First to last qualifying date each year at Hiroshima
Year	First date	Last date
1951	1951-07-22	1951-09-06
1952	1952-07-14	1952-09-17
1953	1953-07-05	1953-09-15
1954	1954-07-21	1954-09-13
1955	1955-06-26	1955-09-07
1956	1956-07-07	1956-09-08
1957	1957-07-14	1957-09-06
1958	1958-06-24	1958-09-17
1959	1959-06-17	1959-09-16
1960	1960-07-01	1960-09-17
1961	1961-06-28	1961-10-04
1962	1962-07-19	1962-09-13
1963	1963-07-13	1963-09-02
1964	1964-07-02	1964-09-19
1965	1965-07-15	1965-09-24
1966	1966-06-26	1966-09-12
1967	1967-06-29	1967-09-29
1968	1968-07-17	1968-09-09
1969	1969-07-15	1969-09-22
1970	1970-07-04	1970-09-13
1971	1971-07-03	1971-09-24
1972	1972-07-01	1972-09-06
1973	1973-06-30	1973-09-01
1974	1974-07-19	1974-09-05
1975	1975-07-14	1975-09-16
1976	1976-07-13	1976-09-07
1977	1977-07-02	1977-09-19
1978	1978-07-02	1978-09-16
1979	1979-06-24	1979-09-19
1980	1980-07-15	1980-08-01
1981	1981-07-03	1981-09-01
1982	1982-07-10	1982-09-02
1983	1983-07-23	1983-09-06
1984	1984-07-03	1984-09-03
1985	1985-07-08	1985-09-20
1986	1986-06-30	1986-09-05
1987	1987-06-06	1987-09-10
1988	1988-06-15	1988-09-20
1989	1989-07-06	1989-09-17
1990	1990-06-14	1990-09-14
1991	1991-06-11	1991-09-19
1992	1992-07-06	1992-10-02
1993	1993-06-14	1993-09-18
1994	1994-06-06	1994-09-23
1996	1996-05-26	1996-09-19
1997	1997-06-13	1997-09-18
1998	1998-05-21	1998-09-25
1999	1999-06-14	1999-09-30
2000	2000-05-25	2000-09-21
2002	2002-06-05	2002-09-21
2003	2003-06-09	2003-09-18
2004	2004-06-16	2004-09-25
2006	2006-06-13	2006-09-09
2007	2007-05-26	2007-10-08
2008	2008-06-12	2008-09-20
2009	2009-05-20	2009-09-26
2010	2010-06-11	2010-09-22
2011	2011-06-23	2011-09-18
2012	2012-06-10	2012-09-26
2016	2016-05-27	2016-10-05
2018	2018-06-09	2018-10-06
2019	2019-05-25	2019-10-11
2025	2025-06-17	2025-10-12
2026	2026-05-18	2026-09-22

Every Fixed Threshold

Fixed thresholds at Hiroshima
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	64	80	1994	70
35 C (95 F): Days	30	28	2018	20
90 F (32.2 C): Days	63	70	1994	52
100 F (37.8 C): Days	2	4	1994	1
0 C (32 F): Ice days (max	5	1	1959	1
0 C (32 F): Frost days (min	41	65	1963	10
20 C (68 F): Tropical nights (min	41	122	2025	114
25 C (77 F): Days with min	39	73	2025	59
10 mm (0.39 in): Days with 10 mm or more rain	57	62	1972	26
25 mm (0.98 in): Days with 25 mm or more rain	57	31	2016	20
50 mm (1.97 in): Days with 50 mm or more rain	57	11	1985	16
100 mm (3.94 in): Days with 100 mm or more rain	33	3	1960	11
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1982	7

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 Hiroshima 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).

Hiroshima Threshold Days by Year (JA000047765)

Key Facts for Hiroshima Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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