Dayton 1 N Threshold Days by Year
16 fixed thresholds counted per year at Dayton 1 N (USC00012188): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Dayton 1 N Thresholds
- Dayton 1 N: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1961 with 57.
- Dayton 1 N: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1961 with 24.
- Dayton 1 N: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 1961 with 11.
- Dayton 1 N: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1962 with 144.
- 16 fixed thresholds have at least one qualifying day at Dayton 1 N.
Days at or above 30 C (86 F)
28 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 120 | 120 |
| 1950 | 120 | 124.3 |
| 1951 | 126 | 124.3 |
| 1952 | 118 | 124.3 |
| 1953 | 138 | 124.3 |
| 1954 | 138 | 124.3 |
| 1955 | 133 | 124.3 |
| 1956 | 118 | 124.3 |
| 1957 | 118 | 124.3 |
| 1958 | 112 | 124.3 |
| 1959 | 122 | 124.3 |
| 1960 | 111 | 121 |
| 1961 | 111 | 121 |
| 1962 | 144 | 121 |
| 1963 | 135 | 121 |
| 1964 | 126 | 121 |
| 1965 | 138 | 121 |
| 1966 | 99 | 121 |
| 1967 | 105 | 121 |
| 1968 | 120 | 121 |
| 1971 | 121 | 111.9 |
| 1973 | 114 | 111.9 |
| 1974 | 121 | 111.9 |
| 1975 | 116 | 111.9 |
| 1976 | 87 | 111.9 |
| 1977 | 126 | 111.9 |
| 1979 | 98 | 111.9 |
| 1981 | 122 | 122 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-05-06 | 1949-10-22 |
| 1950 | 1950-04-27 | 1950-10-31 |
| 1951 | 1951-04-28 | 1951-10-07 |
| 1952 | 1952-04-30 | 1952-10-06 |
| 1953 | 1953-05-01 | 1953-11-04 |
| 1954 | 1954-03-13 | 1954-10-27 |
| 1955 | 1955-03-12 | 1955-10-24 |
| 1956 | 1956-05-12 | 1956-10-02 |
| 1957 | 1957-02-05 | 1957-11-17 |
| 1958 | 1958-04-25 | 1958-10-11 |
| 1959 | 1959-05-01 | 1959-10-14 |
| 1960 | 1960-04-24 | 1960-10-05 |
| 1961 | 1961-05-06 | 1961-11-01 |
| 1962 | 1962-04-30 | 1962-10-20 |
| 1963 | 1963-03-18 | 1963-10-27 |
| 1964 | 1964-04-08 | 1964-10-02 |
| 1965 | 1965-04-09 | 1965-10-17 |
| 1966 | 1966-04-14 | 1966-10-15 |
| 1967 | 1967-04-05 | 1967-10-15 |
| 1968 | 1968-04-19 | 1968-10-15 |
| 1971 | 1971-04-19 | 1971-11-01 |
| 1973 | 1973-05-11 | 1973-10-14 |
| 1974 | 1974-03-10 | 1974-09-22 |
| 1975 | 1975-04-26 | 1975-10-16 |
| 1976 | 1976-04-21 | 1976-10-05 |
| 1977 | 1977-04-04 | 1977-10-02 |
| 1979 | 1979-05-11 | 1979-10-21 |
| 1981 | 1981-04-15 | 1981-10-07 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 28 | 144 | 1962 | 122 |
| 35 C (95 F): Days | 28 | 83 | 1954 | 36 |
| 40 C (104 F): Days | 4 | 2 | 1954 | 1 |
| 90 F (32.2 C): Days | 28 | 116 | 1954 | 89 |
| 100 F (37.8 C): Days | 11 | 25 | 1954 | 6 |
| 0 C (32 F): Ice days (max | 11 | 4 | 1962 | 1 |
| 0 C (32 F): Frost days (min | 27 | 68 | 1968 | 51 |
| -10 C (14 F): Days with min | 14 | 8 | 1962 | 3 |
| 20 C (68 F): Tropical nights (min | 27 | 104 | 1951 | 97 |
| 25 C (77 F): Days with min | 7 | 3 | 1968 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 37 | 57 | 1961 | 29 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 37 | 24 | 1961 | 13 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 37 | 11 | 1961 | 5 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 11 | 3 | 1973 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 2 | 1 | 1942 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 2 | 1 | 1962 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).