Mito Threshold Days by Year (JA000047629)

14 fixed thresholds counted per year at Mito (JA000047629): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mito Thresholds

Mito: days with a maximum temperature at or above 30 C (86 F) in 61 years, most in 2025 with 64.
Mito: days with a maximum temperature at or above 90 F (32.2 C) in 61 years, most in 2010 with 41.
Mito: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1952 with 59.
Mito: days with 25 mm (0.98 in) or more of precipitation in 59 years, most in 1957 with 22.
14 fixed thresholds have at least one qualifying day at Mito.

Days at or above 30 C (86 F)

61 years with a qualifying day

Days per year at Mito with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 64 in 2025.

Days at or above 30 C (86 F) per year at Mito
Year	Days	Decade average
1951	32	24.9
1952	23	24.9
1953	16	24.9
1954	25	24.9
1955	29	24.9
1956	22	24.9
1957	19	24.9
1958	28	24.9
1959	30	24.9
1960	32	31.5
1961	46	31.5
1962	37	31.5
1963	30	31.5
1964	28	31.5
1965	25	31.5
1966	31	31.5
1967	37	31.5
1968	25	31.5
1969	24	31.5
1970	37	32.9
1971	36	32.9
1972	33	32.9
1973	41	32.9
1974	21	32.9
1975	35	32.9
1976	17	32.9
1977	21	32.9
1978	50	32.9
1979	38	32.9
1980	14	24.9
1981	30	24.9
1982	11	24.9
1983	23	24.9
1984	35	24.9
1985	44	24.9
1986	23	24.9
1987	35	24.9
1988	10	24.9
1989	24	24.9
1990	36	29.3
1991	28	29.3
1992	30	29.3
1993	10	29.3
1994	49	29.3
1996	26	29.3
1998	26	29.3
2000	48	32
2002	45	32
2003	26	32
2006	23	32
2007	37	32
2008	24	32
2009	21	32
2010	58	48.3
2011	47	48.3
2012	56	48.3
2016	34	48.3
2018	57	48.3
2019	38	48.3
2025	64	46.5
2026	29	46.5

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

First to last qualifying date each year at Mito
Year	First date	Last date
1951	1951-05-30	1951-09-01
1952	1952-07-01	1952-09-05
1953	1953-06-16	1953-09-26
1954	1954-07-26	1954-09-18
1955	1955-06-24	1955-09-07
1956	1956-06-06	1956-09-11
1957	1957-07-04	1957-09-08
1958	1958-05-30	1958-09-18
1959	1959-07-06	1959-09-27
1960	1960-06-29	1960-09-15
1961	1961-05-27	1961-09-26
1962	1962-07-21	1962-10-03
1963	1963-06-21	1963-08-23
1964	1964-07-06	1964-08-31
1965	1965-06-27	1965-09-17
1966	1966-06-26	1966-09-25
1967	1967-06-01	1967-09-10
1968	1968-07-18	1968-08-29
1969	1969-07-19	1969-09-07
1970	1970-06-28	1970-09-22
1971	1971-07-04	1971-09-05
1972	1972-06-10	1972-09-17
1973	1973-07-08	1973-09-03
1974	1974-07-10	1974-09-05
1975	1975-07-07	1975-09-21
1976	1976-07-22	1976-09-11
1977	1977-07-13	1977-09-20
1978	1978-06-17	1978-09-17
1979	1979-06-17	1979-10-01
1980	1980-06-16	1980-09-13
1981	1981-05-23	1981-08-31
1982	1982-07-12	1982-08-29
1983	1983-07-27	1983-09-13
1984	1984-06-19	1984-10-03
1985	1985-06-05	1985-09-07
1986	1986-07-18	1986-09-11
1987	1987-06-06	1987-09-08
1988	1988-06-07	1988-08-23
1989	1989-07-23	1989-09-28
1990	1990-06-22	1990-09-20
1991	1991-06-12	1991-09-28
1992	1992-07-10	1992-09-11
1993	1993-05-13	1993-09-18
1994	1994-06-04	1994-09-30
1996	1996-06-20	1996-09-02
1998	1998-06-20	1998-10-02
2000	2000-05-30	2000-09-16
2002	2002-06-08	2002-09-12
2003	2003-06-19	2003-09-19
2006	2006-07-13	2006-09-19
2007	2007-06-13	2007-09-28
2008	2008-07-05	2008-09-12
2009	2009-05-21	2009-08-29
2010	2010-06-25	2010-09-22
2011	2011-06-21	2011-09-18
2012	2012-06-20	2012-10-01
2016	2016-06-18	2016-10-06
2018	2018-05-17	2018-10-07
2019	2019-05-24	2019-09-23
2025	2025-06-05	2025-09-29
2026	2026-05-19	2026-09-14

Every Fixed Threshold

Fixed thresholds at Mito
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	61	64	2025	29
35 C (95 F): Days	26	9	1994	2
90 F (32.2 C): Days	61	41	2010	15
100 F (37.8 C): Days	1	1	1996	1
0 C (32 F): Ice days (max	4	1	1952	1
0 C (32 F): Frost days (min	41	111	1984	40
-10 C (14 F): Days with min	5	2	1952	2
20 C (68 F): Tropical nights (min	41	99	2025	73
25 C (77 F): Days with min	22	33	2025	9
10 mm (0.39 in): Days with 10 mm or more rain	59	59	1952	39
25 mm (0.98 in): Days with 25 mm or more rain	59	22	1957	33
50 mm (1.97 in): Days with 50 mm or more rain	57	6	1979	28
100 mm (3.94 in): Days with 100 mm or more rain	27	3	1989	18
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1966	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 Mito 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).

Mito Threshold Days by Year (JA000047629)

Key Facts for Mito Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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