Niigata Threshold Days by Year (JA000047604)

14 fixed thresholds counted per year at Niigata (JA000047604): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Niigata Thresholds

Niigata: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 2025 with 58.
Niigata: days with a maximum temperature at or above 90 F (32.2 C) in 60 years, most in 1994 with 36.
Niigata: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1961 with 79.
Niigata: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1985 with 28.
14 fixed thresholds have at least one qualifying day at Niigata.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Niigata with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 2025.

Days at or above 30 C (86 F) per year at Niigata
Year	Days	Decade average
1951	38	23.9
1952	14	23.9
1953	17	23.9
1954	30	23.9
1955	39	23.9
1956	23	23.9
1957	19	23.9
1958	16	23.9
1959	19	23.9
1960	29	31.7
1961	42	31.7
1962	40	31.7
1963	30	31.7
1964	33	31.7
1965	27	31.7
1966	34	31.7
1967	29	31.7
1968	28	31.7
1969	25	31.7
1970	36	33
1971	27	33
1972	34	33
1973	50	33
1974	27	33
1975	43	33
1976	20	33
1977	21	33
1978	49	33
1979	23	33
1980	13	28.9
1981	28	28.9
1982	17	28.9
1983	25	28.9
1984	41	28.9
1985	47	28.9
1986	25	28.9
1987	31	28.9
1988	29	28.9
1989	33	28.9
1990	42	30.6
1991	23	30.6
1992	33	30.6
1993	13	30.6
1994	53	30.6
1996	32	30.6
1997	23	30.6
1998	26	30.6
2000	55	30.9
2002	37	30.9
2003	19	30.9
2004	27	30.9
2006	39	30.9
2007	29	30.9
2008	24	30.9
2009	17	30.9
2010	54	51
2011	51	51
2012	48	51
2025	58	49
2026	40	49

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

First to last qualifying date each year at Niigata
Year	First date	Last date
1951	1951-06-02	1951-08-31
1952	1952-06-29	1952-08-31
1953	1953-06-20	1953-08-20
1954	1954-07-19	1954-09-26
1955	1955-06-28	1955-10-04
1956	1956-06-05	1956-09-10
1957	1957-07-14	1957-08-27
1958	1958-06-26	1958-09-15
1959	1959-07-08	1959-09-17
1960	1960-06-29	1960-09-23
1961	1961-07-20	1961-09-23
1962	1962-07-09	1962-09-14
1963	1963-06-20	1963-08-30
1964	1964-07-05	1964-08-30
1965	1965-05-20	1965-09-16
1966	1966-07-20	1966-09-08
1967	1967-07-12	1967-09-02
1968	1968-07-16	1968-08-19
1969	1969-06-25	1969-09-06
1970	1970-07-09	1970-09-09
1971	1971-07-05	1971-08-30
1972	1972-06-11	1972-09-07
1973	1973-07-11	1973-09-03
1974	1974-05-19	1974-09-04
1975	1975-07-07	1975-09-20
1976	1976-07-09	1976-09-08
1977	1977-06-29	1977-09-11
1978	1978-06-17	1978-09-19
1979	1979-06-17	1979-09-22
1980	1980-06-02	1980-09-12
1981	1981-07-06	1981-08-30
1982	1982-07-10	1982-08-29
1983	1983-06-15	1983-09-06
1984	1984-06-07	1984-09-02
1985	1985-07-18	1985-09-07
1986	1986-07-12	1986-09-21
1987	1987-04-21	1987-10-17
1988	1988-06-26	1988-09-19
1989	1989-06-25	1989-09-09
1990	1990-06-12	1990-09-12
1991	1991-05-24	1991-09-28
1992	1992-07-20	1992-09-15
1993	1993-07-25	1993-09-04
1994	1994-05-04	1994-09-18
1996	1996-07-16	1996-09-01
1997	1997-06-25	1997-09-02
1998	1998-05-02	1998-09-20
2000	2000-06-30	2000-09-16
2002	2002-06-07	2002-09-04
2003	2003-05-30	2003-09-13
2004	2004-06-21	2004-09-24
2006	2006-05-10	2006-09-18
2007	2007-07-19	2007-09-27
2008	2008-07-05	2008-09-20
2009	2009-06-02	2009-09-02
2010	2010-06-26	2010-09-11
2011	2011-07-07	2011-09-18
2012	2012-07-01	2012-09-18
2025	2025-05-21	2025-09-17
2026	2026-07-05	2026-09-13

Every Fixed Threshold

Fixed thresholds at Niigata
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	58	2025	40
35 C (95 F): Days	41	9	2002	7
90 F (32.2 C): Days	60	36	1994	18
100 F (37.8 C): Days	4	1	1978	1
0 C (32 F): Ice days (max	34	12	1984	1
0 C (32 F): Frost days (min	41	83	1970	23
-10 C (14 F): Days with min	1	1	1978	1
20 C (68 F): Tropical nights (min	41	98	2025	83
25 C (77 F): Days with min	38	35	2025	26
10 mm (0.39 in): Days with 10 mm or more rain	58	79	1961	32
25 mm (0.98 in): Days with 25 mm or more rain	58	28	1985	23
50 mm (1.97 in): Days with 50 mm or more rain	55	5	1958	14
100 mm (3.94 in): Days with 100 mm or more rain	12	2	1978	7
200 mm (7.87 in): Days with 200 mm or more rain	1	0	n/a	2

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 Niigata 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).

Niigata Threshold Days by Year (JA000047604)

Key Facts for Niigata Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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