Baltimore Customs House Threshold Days by Year (USW00013777)
18 fixed thresholds counted per year at Baltimore Customs House (USW00013777): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Baltimore Customs House Thresholds
- Baltimore Customs House: days with a maximum temperature at or above 30 C (86 F) in 125 years, most in 1998 with 112.
- Baltimore Customs House: days with a maximum temperature at or above 90 F (32.2 C) in 125 years, most in 1998 with 84.
- Baltimore Customs House: nights with a minimum temperature at or below 0 C (32 F) in 125 years, most in 1904 with 109.
- Baltimore Customs House: nights with a minimum temperature at or above 20 C (68 F) in 125 years, most in 1991 with 108.
- 18 fixed thresholds have at least one qualifying day at Baltimore Customs House.
Days at or above 30 C (86 F)
125 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1873 | 45 | 44.6 |
| 1874 | 45 | 44.6 |
| 1875 | 35 | 44.6 |
| 1876 | 52 | 44.6 |
| 1877 | 51 | 44.6 |
| 1878 | 42 | 44.6 |
| 1879 | 42 | 44.6 |
| 1880 | 61 | 43.4 |
| 1881 | 75 | 43.4 |
| 1882 | 37 | 43.4 |
| 1883 | 30 | 43.4 |
| 1884 | 43 | 43.4 |
| 1885 | 44 | 43.4 |
| 1886 | 28 | 43.4 |
| 1887 | 48 | 43.4 |
| 1888 | 41 | 43.4 |
| 1889 | 27 | 43.4 |
| 1890 | 38 | 45.3 |
| 1891 | 29 | 45.3 |
| 1892 | 43 | 45.3 |
| 1893 | 44 | 45.3 |
| 1894 | 50 | 45.3 |
| 1895 | 54 | 45.3 |
| 1896 | 49 | 45.3 |
| 1897 | 41 | 45.3 |
| 1898 | 59 | 45.3 |
| 1899 | 46 | 45.3 |
| 1900 | 75 | 46.6 |
| 1901 | 55 | 46.6 |
| 1902 | 42 | 46.6 |
| 1903 | 36 | 46.6 |
| 1904 | 38 | 46.6 |
| 1905 | 38 | 46.6 |
| 1906 | 50 | 46.6 |
| 1907 | 36 | 46.6 |
| 1908 | 51 | 46.6 |
| 1909 | 45 | 46.6 |
| 1910 | 44 | 44.9 |
| 1911 | 55 | 44.9 |
| 1912 | 41 | 44.9 |
| 1913 | 50 | 44.9 |
| 1914 | 55 | 44.9 |
| 1915 | 45 | 44.9 |
| 1916 | 40 | 44.9 |
| 1917 | 35 | 44.9 |
| 1918 | 41 | 44.9 |
| 1919 | 43 | 44.9 |
| 1920 | 40 | 46.9 |
| 1921 | 54 | 46.9 |
| 1922 | 47 | 46.9 |
| 1923 | 44 | 46.9 |
| 1924 | 35 | 46.9 |
| 1925 | 63 | 46.9 |
| 1926 | 51 | 46.9 |
| 1927 | 36 | 46.9 |
| 1928 | 46 | 46.9 |
| 1929 | 53 | 46.9 |
| 1930 | 80 | 64.6 |
| 1931 | 72 | 64.6 |
| 1932 | 64 | 64.6 |
| 1933 | 68 | 64.6 |
| 1934 | 64 | 64.6 |
| 1935 | 50 | 64.6 |
| 1936 | 54 | 64.6 |
| 1937 | 60 | 64.6 |
| 1938 | 61 | 64.6 |
| 1939 | 73 | 64.6 |
| 1940 | 40 | 55.9 |
| 1941 | 78 | 55.9 |
| 1942 | 60 | 55.9 |
| 1943 | 76 | 55.9 |
| 1944 | 69 | 55.9 |
| 1945 | 50 | 55.9 |
| 1946 | 40 | 55.9 |
| 1947 | 51 | 55.9 |
| 1948 | 43 | 55.9 |
| 1949 | 52 | 55.9 |
| 1950 | 39 | 63.1 |
| 1951 | 59 | 63.1 |
| 1952 | 59 | 63.1 |
| 1953 | 55 | 63.1 |
| 1954 | 56 | 63.1 |
| 1955 | 60 | 63.1 |
| 1956 | 69 | 63.1 |
| 1957 | 84 | 63.1 |
| 1958 | 55 | 63.1 |
| 1959 | 95 | 63.1 |
| 1960 | 67 | 71.8 |
| 1961 | 73 | 71.8 |
| 1962 | 76 | 71.8 |
| 1963 | 67 | 71.8 |
| 1964 | 69 | 71.8 |
| 1965 | 68 | 71.8 |
| 1966 | 82 | 71.8 |
| 1967 | 58 | 71.8 |
| 1968 | 75 | 71.8 |
| 1969 | 83 | 71.8 |
| 1970 | 81 | 67.1 |
| 1971 | 60 | 67.1 |
| 1972 | 52 | 67.1 |
| 1973 | 68 | 67.1 |
| 1974 | 55 | 67.1 |
| 1975 | 67 | 67.1 |
| 1976 | 73 | 67.1 |
| 1977 | 81 | 67.1 |
| 1978 | 75 | 67.1 |
| 1979 | 59 | 67.1 |
| 1980 | 82 | 74.7 |
| 1981 | 62 | 74.7 |
| 1982 | 59 | 74.7 |
| 1983 | 81 | 74.7 |
| 1984 | 66 | 74.7 |
| 1985 | 85 | 74.7 |
| 1986 | 91 | 74.7 |
| 1987 | 80 | 74.7 |
| 1988 | 75 | 74.7 |
| 1989 | 66 | 74.7 |
| 1990 | 85 | 82.6 |
| 1991 | 96 | 82.6 |
| 1992 | 67 | 82.6 |
| 1993 | 82 | 82.6 |
| 1994 | 77 | 82.6 |
| 1996 | 58 | 82.6 |
| 1997 | 84 | 82.6 |
| 1998 | 112 | 82.6 |
| Year | First date | Last date |
|---|---|---|
| 1873 | 1873-05-24 | 1873-09-05 |
| 1874 | 1874-05-10 | 1874-09-12 |
| 1875 | 1875-05-22 | 1875-09-06 |
| 1876 | 1876-05-07 | 1876-09-08 |
| 1877 | 1877-05-16 | 1877-09-01 |
| 1878 | 1878-06-26 | 1878-09-03 |
| 1879 | 1879-05-21 | 1879-10-03 |
| 1880 | 1880-05-06 | 1880-09-20 |
| 1881 | 1881-05-11 | 1881-10-16 |
| 1882 | 1882-06-15 | 1882-09-20 |
| 1883 | 1883-05-08 | 1883-08-23 |
| 1884 | 1884-05-02 | 1884-10-06 |
| 1885 | 1885-06-05 | 1885-09-14 |
| 1886 | 1886-04-24 | 1886-09-28 |
| 1887 | 1887-05-04 | 1887-09-07 |
| 1888 | 1888-04-29 | 1888-08-26 |
| 1889 | 1889-05-09 | 1889-08-31 |
| 1890 | 1890-05-01 | 1890-09-07 |
| 1891 | 1891-04-30 | 1891-09-26 |
| 1892 | 1892-05-02 | 1892-09-05 |
| 1893 | 1893-05-21 | 1893-09-22 |
| 1894 | 1894-05-02 | 1894-09-23 |
| 1895 | 1895-04-25 | 1895-09-26 |
| 1896 | 1896-04-16 | 1896-09-19 |
| 1897 | 1897-06-04 | 1897-10-16 |
| 1898 | 1898-05-19 | 1898-09-19 |
| 1899 | 1899-05-28 | 1899-09-08 |
| 1900 | 1900-05-08 | 1900-09-27 |
| 1901 | 1901-04-30 | 1901-09-16 |
| 1902 | 1902-04-22 | 1902-09-01 |
| 1903 | 1903-04-30 | 1903-09-17 |
| 1904 | 1904-05-13 | 1904-10-10 |
| 1905 | 1905-05-12 | 1905-10-01 |
| 1906 | 1906-04-30 | 1906-09-21 |
| 1907 | 1907-03-22 | 1907-09-21 |
| 1908 | 1908-04-27 | 1908-09-12 |
| 1909 | 1909-04-19 | 1909-08-29 |
| 1910 | 1910-04-30 | 1910-10-01 |
| 1911 | 1911-05-11 | 1911-09-25 |
| 1912 | 1912-05-21 | 1912-09-15 |
| 1913 | 1913-05-02 | 1913-09-08 |
| 1914 | 1914-05-11 | 1914-09-23 |
| 1915 | 1915-04-20 | 1915-09-17 |
| 1916 | 1916-05-08 | 1916-10-08 |
| 1917 | 1917-05-18 | 1917-08-29 |
| 1918 | 1918-05-05 | 1918-08-29 |
| 1919 | 1919-05-04 | 1919-10-28 |
| 1920 | 1920-06-02 | 1920-09-12 |
| 1921 | 1921-03-21 | 1921-09-18 |
| 1922 | 1922-04-09 | 1922-10-06 |
| 1923 | 1923-05-29 | 1923-09-04 |
| 1924 | 1924-06-20 | 1924-09-13 |
| 1925 | 1925-04-23 | 1925-09-21 |
| 1926 | 1926-05-08 | 1926-10-05 |
| 1927 | 1927-04-20 | 1927-10-01 |
| 1928 | 1928-05-04 | 1928-10-13 |
| 1929 | 1929-04-06 | 1929-09-10 |
| 1930 | 1930-05-02 | 1930-09-26 |
| 1931 | 1931-05-16 | 1931-10-08 |
| 1932 | 1932-05-16 | 1932-09-23 |
| 1933 | 1933-05-20 | 1933-10-01 |
| 1934 | 1934-05-05 | 1934-09-27 |
| 1935 | 1935-04-27 | 1935-09-21 |
| 1936 | 1936-04-21 | 1936-09-12 |
| 1937 | 1937-05-13 | 1937-09-04 |
| 1938 | 1938-04-20 | 1938-10-17 |
| 1939 | 1939-04-24 | 1939-10-10 |
| 1940 | 1940-05-07 | 1940-09-21 |
| 1941 | 1941-04-14 | 1941-10-07 |
| 1942 | 1942-04-06 | 1942-10-09 |
| 1943 | 1943-05-06 | 1943-09-23 |
| 1944 | 1944-05-05 | 1944-10-07 |
| 1945 | 1945-03-28 | 1945-09-29 |
| 1946 | 1946-05-25 | 1946-09-10 |
| 1947 | 1947-05-12 | 1947-10-23 |
| 1948 | 1948-03-21 | 1948-09-20 |
| 1949 | 1949-05-05 | 1949-10-11 |
| 1950 | 1950-06-06 | 1950-11-01 |
| 1951 | 1951-04-29 | 1951-10-06 |
| 1952 | 1952-04-20 | 1952-09-14 |
| 1953 | 1953-04-25 | 1953-09-30 |
| 1954 | 1954-06-11 | 1954-10-13 |
| 1955 | 1955-05-05 | 1955-09-20 |
| 1956 | 1956-04-28 | 1956-09-23 |
| 1957 | 1957-04-21 | 1957-09-22 |
| 1958 | 1958-05-04 | 1958-10-16 |
| 1959 | 1959-04-08 | 1959-10-06 |
| 1960 | 1960-04-14 | 1960-09-09 |
| 1961 | 1961-04-24 | 1961-09-25 |
| 1962 | 1962-04-22 | 1962-10-12 |
| 1963 | 1963-04-02 | 1963-10-17 |
| 1964 | 1964-04-17 | 1964-09-23 |
| 1965 | 1965-05-03 | 1965-09-23 |
| 1966 | 1966-05-06 | 1966-09-11 |
| 1967 | 1967-04-02 | 1967-10-05 |
| 1968 | 1968-05-03 | 1968-10-02 |
| 1969 | 1969-04-27 | 1969-10-20 |
| 1970 | 1970-05-08 | 1970-09-26 |
| 1971 | 1971-05-19 | 1971-10-03 |
| 1972 | 1972-04-19 | 1972-09-26 |
| 1973 | 1973-04-22 | 1973-10-04 |
| 1974 | 1974-04-29 | 1974-11-01 |
| 1975 | 1975-05-20 | 1975-10-15 |
| 1976 | 1976-04-16 | 1976-09-14 |
| 1977 | 1977-03-30 | 1977-09-20 |
| 1978 | 1978-04-01 | 1978-09-21 |
| 1979 | 1979-05-09 | 1979-10-21 |
| 1980 | 1980-05-05 | 1980-09-23 |
| 1981 | 1981-05-22 | 1981-09-27 |
| 1982 | 1982-05-07 | 1982-09-18 |
| 1983 | 1983-04-28 | 1983-10-04 |
| 1984 | 1984-05-19 | 1984-10-28 |
| 1985 | 1985-03-28 | 1985-09-21 |
| 1986 | 1986-04-27 | 1986-10-02 |
| 1987 | 1987-05-10 | 1987-09-28 |
| 1988 | 1988-05-23 | 1988-09-23 |
| 1989 | 1989-03-28 | 1989-10-16 |
| 1990 | 1990-03-12 | 1990-10-09 |
| 1991 | 1991-04-07 | 1991-09-17 |
| 1992 | 1992-04-17 | 1992-10-15 |
| 1993 | 1993-05-10 | 1993-09-15 |
| 1994 | 1994-03-23 | 1994-09-17 |
| 1996 | 1996-04-22 | 1996-09-10 |
| 1997 | 1997-05-01 | 1997-10-10 |
| 1998 | 1998-03-27 | 1998-10-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 125 | 112 | 1998 | 112 |
| 35 C (95 F): Days | 119 | 39 | 1988 | 37 |
| 40 C (104 F): Days | 12 | 4 | 1988 | 1 |
| 90 F (32.2 C): Days | 125 | 84 | 1998 | 84 |
| 100 F (37.8 C): Days | 53 | 13 | 1988 | 13 |
| 0 C (32 F): Ice days (max | 124 | 32 | 1904 | 4 |
| 0 C (32 F): Frost days (min | 125 | 109 | 1904 | 26 |
| -10 C (14 F): Days with min | 105 | 18 | 1912 | 3 |
| -20 C (-4 F): Days with min | 5 | 2 | 1899 | 1 |
| 20 C (68 F): Tropical nights (min | 125 | 108 | 1991 | 106 |
| 25 C (77 F): Days with min | 106 | 36 | 1988 | 23 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 123 | 52 | 1889 | 41 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 123 | 24 | 1971 | 9 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 103 | 6 | 1889 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 20 | 2 | 1971 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 52 | 4 | 1924 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 11 | 1 | 1899 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1922 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1873.
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).