Charles Mill Lake Threshold Days by Year (USC00331466)
16 fixed thresholds counted per year at Charles Mill Lake (USC00331466): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Charles Mill Lake Thresholds
- Charles Mill Lake: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1986 with 40.
- Charles Mill Lake: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1947 with 12.
- Charles Mill Lake: days with a maximum temperature at or above 30 C (86 F) in 46 years, most in 1952 with 53.
- Charles Mill Lake: days with a maximum temperature at or above 90 F (32.2 C) in 46 years, most in 1952 with 30.
- 16 fixed thresholds have at least one qualifying day at Charles Mill Lake.
Days at or above 30 C (86 F)
46 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1939 | 49 | 49 |
| 1940 | 35 | 35.7 |
| 1941 | 46 | 35.7 |
| 1942 | 35 | 35.7 |
| 1943 | 31 | 35.7 |
| 1944 | 46 | 35.7 |
| 1945 | 28 | 35.7 |
| 1946 | 25 | 35.7 |
| 1947 | 29 | 35.7 |
| 1948 | 36 | 35.7 |
| 1949 | 46 | 35.7 |
| 1950 | 17 | 32.7 |
| 1951 | 25 | 32.7 |
| 1952 | 53 | 32.7 |
| 1953 | 49 | 32.7 |
| 1954 | 34 | 32.7 |
| 1955 | 45 | 32.7 |
| 1956 | 14 | 32.7 |
| 1957 | 28 | 32.7 |
| 1958 | 12 | 32.7 |
| 1959 | 50 | 32.7 |
| 1960 | 25 | 26.2 |
| 1961 | 26 | 26.2 |
| 1962 | 29 | 26.2 |
| 1963 | 28 | 26.2 |
| 1964 | 37 | 26.2 |
| 1965 | 22 | 26.2 |
| 1966 | 27 | 26.2 |
| 1967 | 20 | 26.2 |
| 1968 | 28 | 26.2 |
| 1969 | 20 | 26.2 |
| 1970 | 29 | 22.1 |
| 1971 | 26 | 22.1 |
| 1972 | 10 | 22.1 |
| 1973 | 23 | 22.1 |
| 1974 | 20 | 22.1 |
| 1975 | 30 | 22.1 |
| 1976 | 13 | 22.1 |
| 1977 | 26 | 22.1 |
| 1980 | 27 | 23.3 |
| 1981 | 12 | 23.3 |
| 1982 | 13 | 23.3 |
| 1983 | 46 | 23.3 |
| 1984 | 23 | 23.3 |
| 1985 | 15 | 23.3 |
| 1986 | 27 | 23.3 |
| Year | First date | Last date |
|---|---|---|
| 1939 | 1939-05-20 | 1939-10-10 |
| 1940 | 1940-06-07 | 1940-09-22 |
| 1941 | 1941-05-22 | 1941-10-07 |
| 1942 | 1942-04-26 | 1942-09-19 |
| 1943 | 1943-06-03 | 1943-09-03 |
| 1944 | 1944-05-26 | 1944-09-04 |
| 1945 | 1945-06-14 | 1945-09-10 |
| 1946 | 1946-06-11 | 1946-10-05 |
| 1947 | 1947-06-10 | 1947-09-12 |
| 1948 | 1948-04-26 | 1948-09-19 |
| 1949 | 1949-05-05 | 1949-08-28 |
| 1950 | 1950-06-17 | 1950-08-29 |
| 1951 | 1951-06-02 | 1951-10-06 |
| 1952 | 1952-05-06 | 1952-10-02 |
| 1953 | 1953-05-26 | 1953-10-04 |
| 1954 | 1954-06-01 | 1954-10-03 |
| 1955 | 1955-06-06 | 1955-09-20 |
| 1956 | 1956-06-13 | 1956-09-01 |
| 1957 | 1957-06-16 | 1957-09-03 |
| 1958 | 1958-06-06 | 1958-08-31 |
| 1959 | 1959-05-04 | 1959-09-29 |
| 1960 | 1960-06-05 | 1960-09-10 |
| 1961 | 1961-06-12 | 1961-09-26 |
| 1962 | 1962-05-15 | 1962-09-14 |
| 1963 | 1963-05-10 | 1963-10-08 |
| 1964 | 1964-05-20 | 1964-09-11 |
| 1965 | 1965-05-16 | 1965-09-20 |
| 1966 | 1966-06-10 | 1966-09-04 |
| 1967 | 1967-05-28 | 1967-08-16 |
| 1968 | 1968-06-07 | 1968-09-24 |
| 1969 | 1969-05-30 | 1969-09-02 |
| 1970 | 1970-06-10 | 1970-09-25 |
| 1971 | 1971-06-06 | 1971-09-30 |
| 1972 | 1972-06-20 | 1972-08-15 |
| 1973 | 1973-06-11 | 1973-09-28 |
| 1974 | 1974-06-21 | 1974-08-27 |
| 1975 | 1975-05-21 | 1975-08-26 |
| 1976 | 1976-06-10 | 1976-07-29 |
| 1977 | 1977-05-18 | 1977-09-03 |
| 1980 | 1980-06-27 | 1980-09-22 |
| 1981 | 1981-06-15 | 1981-08-03 |
| 1982 | 1982-05-19 | 1982-08-08 |
| 1983 | 1983-06-13 | 1983-09-20 |
| 1984 | 1984-06-07 | 1984-09-23 |
| 1985 | 1985-04-24 | 1985-09-09 |
| 1986 | 1986-04-28 | 1986-09-30 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 46 | 53 | 1952 | 27 |
| 35 C (95 F): Days | 19 | 7 | 1941 | 1 |
| 90 F (32.2 C): Days | 46 | 30 | 1952 | 5 |
| 100 F (37.8 C): Days | 2 | 2 | 1953 | 2 |
| 0 C (32 F): Ice days (max | 46 | 66 | 1960 | 42 |
| 0 C (32 F): Frost days (min | 45 | 176 | 1963 | 145 |
| -10 C (14 F): Days with min | 45 | 64 | 1968 | 30 |
| -20 C (-4 F): Days with min | 39 | 24 | 1963 | 3 |
| -30 C (-22 F): Days with min | 3 | 2 | 1963 | 1 |
| 20 C (68 F): Tropical nights (min | 41 | 20 | 1949 | 7 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 48 | 40 | 1986 | 40 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 48 | 12 | 1947 | 9 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 27 | 4 | 1959 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1969 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 40 | 6 | 1974 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 5 | 1 | 1944 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.
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).