Yamaguchi Threshold Days by Year (JA000047784)

13 fixed thresholds counted per year at Yamaguchi (JA000047784): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yamaguchi Thresholds

Yamaguchi: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 2022 with 89.
Yamaguchi: days with a maximum temperature at or above 90 F (32.2 C) in 52 years, most in 2025 with 68.
Yamaguchi: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1980 with 69.
Yamaguchi: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 2016 with 42.
13 fixed thresholds have at least one qualifying day at Yamaguchi.

Days at or above 30 C (86 F)

52 years with a qualifying day

Days per year at Yamaguchi with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 89 in 2022.

Days at or above 30 C (86 F) per year at Yamaguchi
Year	Days	Decade average
1967	65	50.7
1968	37	50.7
1969	50	50.7
1970	55	51.7
1971	44	51.7
1972	43	51.7
1973	61	51.7
1974	37	51.7
1975	64	51.7
1976	38	51.7
1977	56	51.7
1978	75	51.7
1979	44	51.7
1980	21	50.5
1981	51	50.5
1982	43	50.5
1983	52	50.5
1984	57	50.5
1985	61	50.5
1986	54	50.5
1987	54	50.5
1988	57	50.5
1989	55	50.5
1993	28	56.1
1994	74	56.1
1995	52	56.1
1996	58	56.1
1997	56	56.1
1998	73	56.1
1999	52	56.1
2000	74	64
2002	70	64
2003	40	64
2004	66	64
2006	58	64
2007	68	64
2008	68	64
2009	68	64
2010	79	67.5
2011	68	67.5
2012	62	67.5
2013	84	67.5
2014	53	67.5
2015	46	67.5
2016	74	67.5
2017	73	67.5
2018	72	67.5
2019	64	67.5
2021	80	81.5
2022	89	81.5
2025	88	81.5
2026	69	81.5

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

First to last qualifying date each year at Yamaguchi
Year	First date	Last date
1967	1967-06-12	1967-09-30
1968	1968-06-06	1968-08-26
1969	1969-05-09	1969-09-21
1970	1970-05-18	1970-09-15
1971	1971-05-21	1971-09-08
1972	1972-06-09	1972-09-07
1973	1973-06-15	1973-08-31
1974	1974-06-15	1974-09-05
1975	1975-06-16	1975-09-23
1976	1976-07-12	1976-09-02
1977	1977-05-20	1977-09-18
1978	1978-06-19	1978-09-17
1979	1979-05-29	1979-09-25
1980	1980-05-11	1980-09-06
1981	1981-05-26	1981-09-01
1982	1982-05-11	1982-09-02
1983	1983-05-31	1983-09-17
1984	1984-06-18	1984-09-03
1985	1985-06-20	1985-09-20
1986	1986-06-01	1986-09-08
1987	1987-06-04	1987-09-15
1988	1988-05-18	1988-09-20
1989	1989-06-26	1989-09-17
1993	1993-06-11	1993-09-18
1994	1994-06-03	1994-09-21
1995	1995-06-29	1995-09-09
1996	1996-05-25	1996-09-19
1997	1997-06-13	1997-09-13
1998	1998-05-21	1998-09-21
1999	1999-06-15	1999-09-29
2000	2000-05-24	2000-09-20
2002	2002-06-02	2002-09-14
2003	2003-06-09	2003-09-18
2004	2004-06-05	2004-09-20
2006	2006-06-01	2006-09-08
2007	2007-05-27	2007-09-28
2008	2008-05-03	2008-09-23
2009	2009-05-09	2009-09-26
2010	2010-06-05	2010-09-22
2011	2011-06-06	2011-09-17
2012	2012-05-28	2012-09-15
2013	2013-05-13	2013-10-10
2014	2014-05-17	2014-09-16
2015	2015-05-25	2015-09-29
2016	2016-05-21	2016-10-03
2017	2017-05-20	2017-09-13
2018	2018-05-15	2018-09-19
2019	2019-05-11	2019-10-03
2021	2021-05-31	2021-10-11
2022	2022-05-22	2022-10-01
2025	2025-05-20	2025-10-13
2026	2026-05-17	2026-09-24

Every Fixed Threshold

Fixed thresholds at Yamaguchi
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	52	89	2022	69
35 C (95 F): Days	36	35	2018	28
90 F (32.2 C): Days	52	68	2025	48
100 F (37.8 C): Days	7	3	2018	1
0 C (32 F): Ice days (max	13	2	1967	1
0 C (32 F): Frost days (min	25	81	1970	25
20 C (68 F): Tropical nights (min	25	111	2025	106
25 C (77 F): Days with min	23	40	2025	52
10 mm (0.39 in): Days with 10 mm or more rain	41	69	1980	34
25 mm (0.98 in): Days with 25 mm or more rain	41	42	2016	24
50 mm (1.97 in): Days with 50 mm or more rain	41	15	1980	17
100 mm (3.94 in): Days with 100 mm or more rain	36	4	2019	9
200 mm (7.87 in): Days with 200 mm or more rain	5	1	1972	5

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

Data for Yamaguchi 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).

Yamaguchi Threshold Days by Year (JA000047784)

Key Facts for Yamaguchi Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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