Hachijojima Threshold Days by Year (JA000047678)
10 fixed thresholds counted per year at Hachijojima (JA000047678): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Hachijojima Thresholds
- Hachijojima: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1975 with 105.
- Hachijojima: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 1954 with 57.
- Hachijojima: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1954 with 25.
- Hachijojima: days with 100 mm (3.94 in) or more of precipitation in 50 years, most in 1979 with 11.
- 10 fixed thresholds have at least one qualifying day at Hachijojima.
Days at or above 30 C (86 F)
45 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1951 | 30 | 23 |
| 1952 | 27 | 23 |
| 1953 | 24 | 23 |
| 1954 | 21 | 23 |
| 1955 | 14 | 23 |
| 1956 | 26 | 23 |
| 1957 | 22 | 23 |
| 1958 | 26 | 23 |
| 1959 | 17 | 23 |
| 1960 | 14 | 19.3 |
| 1961 | 45 | 19.3 |
| 1962 | 15 | 19.3 |
| 1963 | 1 | 19.3 |
| 1964 | 32 | 19.3 |
| 1965 | 7 | 19.3 |
| 1966 | 30 | 19.3 |
| 1967 | 22 | 19.3 |
| 1968 | 1 | 19.3 |
| 1969 | 26 | 19.3 |
| 1970 | 19 | 9.9 |
| 1971 | 9 | 9.9 |
| 1972 | 3 | 9.9 |
| 1973 | 12 | 9.9 |
| 1974 | 3 | 9.9 |
| 1975 | 7 | 9.9 |
| 1976 | 2 | 9.9 |
| 1977 | 8 | 9.9 |
| 1978 | 17 | 9.9 |
| 1979 | 19 | 9.9 |
| 1980 | 5 | 13.5 |
| 1981 | 14 | 13.5 |
| 1982 | 2 | 13.5 |
| 1983 | 17 | 13.5 |
| 1984 | 37 | 13.5 |
| 1985 | 16 | 13.5 |
| 1986 | 11 | 13.5 |
| 1987 | 13 | 13.5 |
| 1988 | 8 | 13.5 |
| 1989 | 12 | 13.5 |
| 1990 | 19 | 17.5 |
| 1991 | 16 | 17.5 |
| 2008 | 23 | 16 |
| 2009 | 9 | 16 |
| 2025 | 32 | 28 |
| 2026 | 24 | 28 |
| Year | First date | Last date |
|---|---|---|
| 1951 | 1951-07-22 | 1951-08-29 |
| 1952 | 1952-08-01 | 1952-09-14 |
| 1953 | 1953-07-24 | 1953-09-24 |
| 1954 | 1954-08-06 | 1954-09-24 |
| 1955 | 1955-07-09 | 1955-08-21 |
| 1956 | 1956-07-15 | 1956-09-07 |
| 1957 | 1957-08-01 | 1957-09-10 |
| 1958 | 1958-08-03 | 1958-09-23 |
| 1959 | 1959-07-29 | 1959-09-14 |
| 1960 | 1960-08-01 | 1960-09-18 |
| 1961 | 1961-07-09 | 1961-09-26 |
| 1962 | 1962-07-23 | 1962-09-22 |
| 1963 | 1963-07-26 | 1963-07-26 |
| 1964 | 1964-07-17 | 1964-09-20 |
| 1965 | 1965-08-02 | 1965-08-15 |
| 1966 | 1966-07-22 | 1966-09-08 |
| 1967 | 1967-07-17 | 1967-09-06 |
| 1968 | 1968-08-22 | 1968-08-22 |
| 1969 | 1969-07-26 | 1969-09-17 |
| 1970 | 1970-07-22 | 1970-09-16 |
| 1971 | 1971-07-29 | 1971-08-28 |
| 1972 | 1972-08-04 | 1972-09-06 |
| 1973 | 1973-08-10 | 1973-09-04 |
| 1974 | 1974-08-04 | 1974-08-24 |
| 1975 | 1975-07-28 | 1975-08-15 |
| 1976 | 1976-08-15 | 1976-08-24 |
| 1977 | 1977-07-16 | 1977-08-06 |
| 1978 | 1978-07-08 | 1978-08-30 |
| 1979 | 1979-07-31 | 1979-09-03 |
| 1980 | 1980-07-22 | 1980-09-07 |
| 1981 | 1981-07-14 | 1981-09-01 |
| 1982 | 1982-08-24 | 1982-08-29 |
| 1983 | 1983-07-26 | 1983-09-05 |
| 1984 | 1984-07-17 | 1984-09-05 |
| 1985 | 1985-07-20 | 1985-09-21 |
| 1986 | 1986-07-30 | 1986-09-06 |
| 1987 | 1987-07-26 | 1987-09-10 |
| 1988 | 1988-07-28 | 1988-09-08 |
| 1989 | 1989-08-09 | 1989-09-16 |
| 1990 | 1990-07-10 | 1990-09-06 |
| 1991 | 1991-07-21 | 1991-09-10 |
| 2008 | 2008-07-19 | 2008-09-04 |
| 2009 | 2009-07-28 | 2009-08-28 |
| 2025 | 2025-07-06 | 2025-09-18 |
| 2026 | 2026-07-13 | 2026-09-12 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 45 | 45 | 1961 | 24 |
| 90 F (32.2 C): Days | 11 | 4 | 1951 | 1 |
| 0 C (32 F): Frost days (min | 3 | 2 | 1981 | 1 |
| 20 C (68 F): Tropical nights (min | 41 | 136 | 1956 | 120 |
| 25 C (77 F): Days with min | 41 | 45 | 1961 | 32 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 52 | 105 | 1975 | 23 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 52 | 57 | 1954 | 20 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 52 | 25 | 1954 | 19 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 50 | 11 | 1979 | 16 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 15 | 2 | 1955 | 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
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 . Last revised (2026-10-17).