Carrollton Lock 1 Threshold Days by Year (USC00151345)
19 fixed thresholds counted per year at Carrollton Lock 1 (USC00151345): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Carrollton Lock 1 Thresholds
- Carrollton Lock 1: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 1996 with 53.
- Carrollton Lock 1: days with 25 mm (0.98 in) or more of precipitation in 89 years, most in 1996 with 22.
- Carrollton Lock 1: days with 50 mm (1.97 in) or more of precipitation in 74 years, most in 1933 with 5.
- Carrollton Lock 1: nights with a minimum temperature at or below 0 C (32 F) in 54 years, most in 1988 with 135.
- 19 fixed thresholds have at least one qualifying day at Carrollton Lock 1.
Days at or above 30 C (86 F)
50 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1895 | 111 | 97.5 |
| 1897 | 87 | 97.5 |
| 1898 | 98 | 97.5 |
| 1899 | 94 | 97.5 |
| 1900 | 97 | 84 |
| 1901 | 81 | 84 |
| 1902 | 74 | 84 |
| 1951 | 87 | 74.6 |
| 1952 | 95 | 74.6 |
| 1953 | 91 | 74.6 |
| 1954 | 89 | 74.6 |
| 1955 | 72 | 74.6 |
| 1956 | 56 | 74.6 |
| 1957 | 56 | 74.6 |
| 1958 | 36 | 74.6 |
| 1959 | 89 | 74.6 |
| 1960 | 61 | 56.2 |
| 1961 | 48 | 56.2 |
| 1962 | 56 | 56.2 |
| 1963 | 57 | 56.2 |
| 1964 | 76 | 56.2 |
| 1965 | 53 | 56.2 |
| 1966 | 65 | 56.2 |
| 1967 | 40 | 56.2 |
| 1968 | 53 | 56.2 |
| 1969 | 53 | 56.2 |
| 1970 | 63 | 48.6 |
| 1971 | 40 | 48.6 |
| 1972 | 47 | 48.6 |
| 1973 | 52 | 48.6 |
| 1974 | 29 | 48.6 |
| 1975 | 60 | 48.6 |
| 1976 | 41 | 48.6 |
| 1977 | 61 | 48.6 |
| 1978 | 61 | 48.6 |
| 1979 | 32 | 48.6 |
| 1980 | 73 | 72.4 |
| 1981 | 41 | 72.4 |
| 1982 | 38 | 72.4 |
| 1983 | 75 | 72.4 |
| 1984 | 85 | 72.4 |
| 1987 | 111 | 72.4 |
| 1988 | 84 | 72.4 |
| 1990 | 55 | 63 |
| 1991 | 86 | 63 |
| 1992 | 27 | 63 |
| 1993 | 58 | 63 |
| 1996 | 52 | 63 |
| 1998 | 79 | 63 |
| 1999 | 84 | 63 |
| Year | First date | Last date |
|---|---|---|
| 1895 | 1895-03-30 | 1895-09-25 |
| 1897 | 1897-04-24 | 1897-10-16 |
| 1898 | 1898-05-01 | 1898-10-03 |
| 1899 | 1899-04-27 | 1899-10-15 |
| 1900 | 1900-05-13 | 1900-10-26 |
| 1901 | 1901-05-01 | 1901-09-10 |
| 1902 | 1902-04-22 | 1902-09-23 |
| 1951 | 1951-04-29 | 1951-10-18 |
| 1952 | 1952-04-20 | 1952-10-01 |
| 1953 | 1953-05-21 | 1953-10-21 |
| 1954 | 1954-04-25 | 1954-10-05 |
| 1955 | 1955-05-04 | 1955-09-22 |
| 1956 | 1956-05-12 | 1956-09-14 |
| 1957 | 1957-04-21 | 1957-09-11 |
| 1958 | 1958-06-04 | 1958-09-06 |
| 1959 | 1959-05-02 | 1959-10-05 |
| 1960 | 1960-04-23 | 1960-09-23 |
| 1961 | 1961-06-01 | 1961-09-24 |
| 1962 | 1962-04-30 | 1962-09-14 |
| 1963 | 1963-05-08 | 1963-10-20 |
| 1964 | 1964-05-18 | 1964-09-21 |
| 1965 | 1965-05-08 | 1965-09-22 |
| 1966 | 1966-05-08 | 1966-09-05 |
| 1967 | 1967-05-25 | 1967-09-21 |
| 1968 | 1968-06-06 | 1968-10-14 |
| 1969 | 1969-05-06 | 1969-09-06 |
| 1970 | 1970-04-29 | 1970-09-24 |
| 1971 | 1971-06-04 | 1971-10-01 |
| 1972 | 1972-05-25 | 1972-09-20 |
| 1973 | 1973-06-03 | 1973-09-28 |
| 1974 | 1974-05-17 | 1974-08-27 |
| 1975 | 1975-05-21 | 1975-10-13 |
| 1976 | 1976-06-08 | 1976-09-08 |
| 1977 | 1977-04-18 | 1977-09-27 |
| 1978 | 1978-05-28 | 1978-09-22 |
| 1979 | 1979-05-12 | 1979-09-02 |
| 1980 | 1980-05-30 | 1980-09-22 |
| 1981 | 1981-06-06 | 1981-10-01 |
| 1982 | 1982-05-12 | 1982-09-15 |
| 1983 | 1983-06-12 | 1983-10-04 |
| 1984 | 1984-04-26 | 1984-09-25 |
| 1987 | 1987-04-22 | 1987-09-29 |
| 1988 | 1988-04-05 | 1988-09-14 |
| 1990 | 1990-06-08 | 1990-09-08 |
| 1991 | 1991-05-16 | 1991-09-17 |
| 1992 | 1992-06-16 | 1992-09-17 |
| 1993 | 1993-05-09 | 1993-09-15 |
| 1996 | 1996-05-18 | 1996-09-06 |
| 1998 | 1998-05-14 | 1998-10-01 |
| 1999 | 1999-05-18 | 1999-09-29 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 50 | 111 | 1895 | 84 |
| 35 C (95 F): Days | 32 | 38 | 1895 | 14 |
| 40 C (104 F): Days | 4 | 3 | 1988 | 3 |
| 90 F (32.2 C): Days | 50 | 87 | 1895 | 52 |
| 100 F (37.8 C): Days | 12 | 12 | 1988 | 2 |
| 0 C (32 F): Ice days (max | 50 | 35 | 1978 | 5 |
| 0 C (32 F): Frost days (min | 54 | 135 | 1988 | 84 |
| -10 C (14 F): Days with min | 54 | 38 | 1977 | 9 |
| -20 C (-4 F): Days with min | 28 | 13 | 1977 | 3 |
| -30 C (-22 F): Days with min | 2 | 1 | 1977 | 1 |
| 20 C (68 F): Tropical nights (min | 54 | 97 | 1898 | 36 |
| 25 C (77 F): Days with min | 15 | 13 | 1901 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 89 | 53 | 1996 | 45 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 89 | 22 | 1996 | 18 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 74 | 5 | 1933 | 6 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 9 | 2 | 1960 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1947 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 23 | 3 | 1942 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1966 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.
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 (2025-12-31).