Shimojishima Threshold Days by Year (JA000047927)

10 fixed thresholds counted per year at Shimojishima (JA000047927): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shimojishima Thresholds

Shimojishima: days with a maximum temperature at or above 30 C (86 F) in 40 years, most in 1971 with 128.
Shimojishima: nights with a minimum temperature at or above 20 C (68 F) in 40 years, most in 1998 with 267.
Shimojishima: nights with a minimum temperature at or above 25 C (77 F) in 40 years, most in 1998 with 127.
Shimojishima: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1992 with 76.
10 fixed thresholds have at least one qualifying day at Shimojishima.

Days at or above 30 C (86 F)

40 years with a qualifying day

Days per year at Shimojishima with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 128 in 1971.

Days at or above 30 C (86 F) per year at Shimojishima
Year	Days	Decade average
1961	91	88.7
1962	100	88.7
1963	107	88.7
1964	103	88.7
1965	75	88.7
1966	72	88.7
1967	87	88.7
1968	75	88.7
1969	88	88.7
1970	118	86.6
1971	128	86.6
1972	103	86.6
1973	73	86.6
1974	70	86.6
1975	67	86.6
1976	59	86.6
1977	99	86.6
1978	74	86.6
1979	75	86.6
1980	98	94.6
1981	76	94.6
1982	79	94.6
1983	120	94.6
1984	104	94.6
1985	80	94.6
1986	94	94.6
1987	96	94.6
1988	103	94.6
1989	96	94.6
1990	80	93.6
1991	112	93.6
1992	77	93.6
1993	104	93.6
1994	92	93.6
1995	95	93.6
1996	100	93.6
1997	57	93.6
1998	119	93.6
1999	100	93.6
2000	86	86

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

First to last qualifying date each year at Shimojishima
Year	First date	Last date
1961	1961-05-15	1961-09-24
1962	1962-05-16	1962-10-11
1963	1963-05-16	1963-09-30
1964	1964-04-21	1964-10-13
1965	1965-06-10	1965-10-06
1966	1966-04-14	1966-09-11
1967	1967-05-12	1967-09-20
1968	1968-06-24	1968-09-21
1969	1969-05-05	1969-09-27
1970	1970-05-09	1970-10-15
1971	1971-05-23	1971-10-10
1972	1972-06-02	1972-11-06
1973	1973-05-02	1973-09-19
1974	1974-05-18	1974-10-08
1975	1975-06-17	1975-10-15
1976	1976-05-19	1976-09-21
1977	1977-05-04	1977-09-28
1978	1978-06-09	1978-09-29
1979	1979-06-20	1979-09-25
1980	1980-05-13	1980-09-25
1981	1981-06-13	1981-10-08
1982	1982-06-16	1982-10-03
1983	1983-06-08	1983-10-22
1984	1984-06-07	1984-10-06
1985	1985-05-12	1985-10-13
1986	1986-06-04	1986-09-20
1987	1987-05-13	1987-11-02
1988	1988-05-28	1988-10-02
1989	1989-05-21	1989-09-29
1990	1990-05-18	1990-09-24
1991	1991-05-23	1991-10-03
1992	1992-06-13	1992-09-24
1993	1993-05-21	1993-10-13
1994	1994-06-06	1994-09-12
1995	1995-05-02	1995-10-06
1996	1996-06-05	1996-09-26
1997	1997-05-16	1997-09-13
1998	1998-05-02	1998-11-15
1999	1999-06-02	1999-10-13
2000	2000-05-27	2000-10-17

Every Fixed Threshold

Fixed thresholds at Shimojishima
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	40	128	1971	86
35 C (95 F): Days	1	2	1971	2
90 F (32.2 C): Days	39	65	1971	6
20 C (68 F): Tropical nights (min	40	267	1998	238
25 C (77 F): Days with min	40	127	1998	90
10 mm (0.39 in): Days with 10 mm or more rain	40	76	1992	60
25 mm (0.98 in): Days with 25 mm or more rain	40	37	1966	25
50 mm (1.97 in): Days with 50 mm or more rain	40	20	1966	14
100 mm (3.94 in): Days with 100 mm or more rain	36	6	1966	2
200 mm (7.87 in): Days with 200 mm or more rain	8	2	1979	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.

Download the Data

Data for Shimojishima 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Shimojishima Threshold Days by Year (JA000047927)

Key Facts for Shimojishima Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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