Rumoi Threshold Days by Year (JA000047406)
14 fixed thresholds counted per year at Rumoi (JA000047406): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rumoi Thresholds
- Rumoi: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1970 with 54.
- Rumoi: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1955 with 12.
- Rumoi: days with a maximum temperature at or below 0 C (32 F) in 42 years, most in 1952 with 99.
- Rumoi: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1952 with 156.
- 14 fixed thresholds have at least one qualifying day at Rumoi.
Days at or above 30 C (86 F)
30 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1951 | 8 | 2.8 |
| 1952 | 1 | 2.8 |
| 1955 | 2 | 2.8 |
| 1956 | 1 | 2.8 |
| 1959 | 2 | 2.8 |
| 1961 | 2 | 1.3 |
| 1962 | 1 | 1.3 |
| 1965 | 1 | 1.3 |
| 1967 | 1 | 1.3 |
| 1970 | 2 | 2.5 |
| 1971 | 3 | 2.5 |
| 1972 | 1 | 2.5 |
| 1973 | 1 | 2.5 |
| 1974 | 1 | 2.5 |
| 1975 | 1 | 2.5 |
| 1976 | 3 | 2.5 |
| 1977 | 2 | 2.5 |
| 1978 | 9 | 2.5 |
| 1979 | 2 | 2.5 |
| 1981 | 1 | 4.1 |
| 1982 | 4 | 4.1 |
| 1983 | 2 | 4.1 |
| 1984 | 5 | 4.1 |
| 1985 | 5 | 4.1 |
| 1986 | 3 | 4.1 |
| 1988 | 3 | 4.1 |
| 1989 | 10 | 4.1 |
| 1990 | 1 | 1 |
| 2025 | 3 | 2 |
| 2026 | 1 | 2 |
| Year | First date | Last date |
|---|---|---|
| 1951 | 1951-08-17 | 1951-08-24 |
| 1952 | 1952-08-09 | 1952-08-09 |
| 1955 | 1955-08-02 | 1955-08-09 |
| 1956 | 1956-09-06 | 1956-09-06 |
| 1959 | 1959-08-14 | 1959-08-15 |
| 1961 | 1961-08-13 | 1961-08-14 |
| 1962 | 1962-08-14 | 1962-08-14 |
| 1965 | 1965-08-17 | 1965-08-17 |
| 1967 | 1967-07-23 | 1967-07-23 |
| 1970 | 1970-08-20 | 1970-08-22 |
| 1971 | 1971-07-08 | 1971-08-05 |
| 1972 | 1972-07-24 | 1972-07-24 |
| 1973 | 1973-08-05 | 1973-08-05 |
| 1974 | 1974-08-03 | 1974-08-03 |
| 1975 | 1975-08-22 | 1975-08-22 |
| 1976 | 1976-07-24 | 1976-07-26 |
| 1977 | 1977-07-25 | 1977-07-30 |
| 1978 | 1978-07-09 | 1978-08-20 |
| 1979 | 1979-08-17 | 1979-08-18 |
| 1981 | 1981-08-03 | 1981-08-03 |
| 1982 | 1982-07-12 | 1982-08-19 |
| 1983 | 1983-08-16 | 1983-08-17 |
| 1984 | 1984-07-17 | 1984-08-16 |
| 1985 | 1985-08-03 | 1985-08-16 |
| 1986 | 1986-07-31 | 1986-08-30 |
| 1988 | 1988-08-20 | 1988-08-22 |
| 1989 | 1989-07-24 | 1989-08-21 |
| 1990 | 1990-07-24 | 1990-07-24 |
| 2025 | 2025-07-17 | 2025-08-01 |
| 2026 | 2026-07-15 | 2026-07-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 30 | 10 | 1989 | 1 |
| 35 C (95 F): Days | 1 | 1 | 1978 | 1 |
| 90 F (32.2 C): Days | 10 | 5 | 1989 | 5 |
| 0 C (32 F): Ice days (max | 42 | 99 | 1952 | 34 |
| 0 C (32 F): Frost days (min | 41 | 156 | 1952 | 72 |
| -10 C (14 F): Days with min | 41 | 43 | 1953 | 12 |
| -20 C (-4 F): Days with min | 9 | 4 | 1977 | 3 |
| 20 C (68 F): Tropical nights (min | 40 | 44 | 2025 | 24 |
| 25 C (77 F): Days with min | 2 | 1 | 1979 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 56 | 54 | 1970 | 21 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 56 | 12 | 1955 | 15 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 37 | 7 | 1981 | 10 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 11 | 2 | 1953 | 7 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 0 | n/a | 1 |
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).