Chichibu Threshold Days by Year (JA000047641)

14 fixed thresholds counted per year at Chichibu (JA000047641): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chichibu Thresholds

Chichibu: days with a maximum temperature at or above 30 C (86 F) in 69 years, most in 2025 with 79.
Chichibu: days with a maximum temperature at or above 90 F (32.2 C) in 69 years, most in 2025 with 55.
Chichibu: days with a maximum temperature at or above 35 C (95 F) in 58 years, most in 2018 with 28.
Chichibu: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1956 with 46.
14 fixed thresholds have at least one qualifying day at Chichibu.

Days at or above 30 C (86 F)

69 years with a qualifying day

Days per year at Chichibu with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 2025.

Days at or above 30 C (86 F) per year at Chichibu
Year	Days	Decade average
1951	39	39.1
1952	38	39.1
1953	26	39.1
1954	35	39.1
1955	50	39.1
1956	42	39.1
1957	33	39.1
1958	46	39.1
1959	43	39.1
1960	46	42.3
1961	52	42.3
1962	45	42.3
1963	39	42.3
1964	42	42.3
1965	39	42.3
1966	38	42.3
1967	48	42.3
1968	27	42.3
1969	47	42.3
1970	45	43.8
1971	41	43.8
1972	41	43.8
1973	51	43.8
1974	34	43.8
1975	57	43.8
1976	24	43.8
1977	34	43.8
1978	65	43.8
1979	46	43.8
1980	23	36.9
1981	38	36.9
1982	24	36.9
1983	35	36.9
1984	45	36.9
1985	56	36.9
1986	36	36.9
1987	50	36.9
1988	27	36.9
1989	35	36.9
1992	41	44.7
1993	24	44.7
1994	67	44.7
1995	40	44.7
1996	47	44.7
1998	47	44.7
1999	47	44.7
2000	59	49
2002	56	49
2003	31	49
2004	59	49
2005	59	49
2006	39	49
2007	53	49
2008	48	49
2009	37	49
2010	70	57.8
2011	56	57.8
2012	68	57.8
2013	60	57.8
2014	44	57.8
2015	50	57.8
2016	60	57.8
2017	55	57.8
2018	67	57.8
2019	48	57.8
2021	46	54.5
2022	51	54.5
2025	79	54.5
2026	42	54.5

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

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

Every Fixed Threshold

Fixed thresholds at Chichibu
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	69	79	2025	42
35 C (95 F): Days	58	28	2018	7
90 F (32.2 C): Days	69	55	2025	26
100 F (37.8 C): Days	13	3	2011	1
0 C (32 F): Ice days (max	5	3	1984	3
0 C (32 F): Frost days (min	41	137	1965	55
-10 C (14 F): Days with min	24	11	1963	5
20 C (68 F): Tropical nights (min	41	88	2025	65
25 C (77 F): Days with min	4	8	2025	5
10 mm (0.39 in): Days with 10 mm or more rain	53	46	1956	42
25 mm (0.98 in): Days with 25 mm or more rain	53	19	1988	29
50 mm (1.97 in): Days with 50 mm or more rain	51	9	1972	19
100 mm (3.94 in): Days with 100 mm or more rain	28	4	1983	10
200 mm (7.87 in): Days with 200 mm or more rain	9	2	1958	3

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 Chichibu 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).

Chichibu Threshold Days by Year (JA000047641)

Key Facts for Chichibu Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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