Monthly mean minimum temperatures for Boston, MA
Monthly mean minimum temperatures for BOSTON WSFO AP
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Tot
1872 18.2 37.5 50.7 61.1 65.4 63.7 56.1 44.4 33.5 15.6 44.6
1873 17.3 19.0 26.4 38.1 46.7 56.7 63.3 61.3 53.3 44.4 25.7 24.6 39.7
1874 22.8 18.6 25.6 30.8 46.4 57.0 63.1 59.0 56.8 44.5 33.3 22.3 40.0
1875 12.5 13.0 23.3 33.7 48.1 56.4 62.3 63.3 50.6 42.1 26.5 21.6 37.8
1876 21.5 18.7 24.6 35.1 45.5 60.0 65.4 61.5 52.6 38.6 35.2 12.8 39.3
1877 15.6 25.2 27.3 37.2 45.9 57.8 63.5 63.9 56.2 43.2 36.8 27.3 41.7
1878 18.2 21.9 31.0 41.8 48.5 55.6 64.5 61.0 55.7 47.4 33.4 23.1 41.8
1879 14.1 15.2 25.7 33.6 50.2 55.1 61.5 60.6 52.4 47.6 30.1 23.5 39.1
1880 25.5 21.2 25.0 36.9 52.7 58.5 62.7 60.1 55.8 41.6 29.8 19.3 40.8
1881 13.1 18.6 31.0 34.5 46.7 52.2 60.7 61.9 59.0 43.9 34.0 29.8 40.4
1882 16.7 21.3 27.1 33.2 41.4 56.4 62.9 61.0 56.6 47.5 31.5 22.6 39.9
1883 15.4 19.2 21.1 35.8 47.4 60.3 61.2 58.6 51.2 39.2 33.9 20.9 38.7
1884 16.2 23.1 26.1 36.8 45.5 56.5 60.0 61.8 57.2 43.8 32.6 26.2 40.5
1885 18.0 12.6 18.5 38.4 45.6 56.2 63.4 60.5 51.0 44.2 37.2 24.7 39.2
1886 18.7 18.1 26.2 40.5 48.2 55.6 62.9 59.5 55.4 44.3 35.5 20.7 40.5
1887 15.7 20.9 24.0 36.0 51.8 57.0 67.0 60.3 51.9 44.1 33.7 25.6 40.7
1888 11.4 19.5 24.7 34.7 45.5 57.2 60.1 61.4 53.5 41.2 36.5 27.8 39.5
1889 29.5 19.0 32.1 40.8 51.0 61.3 62.8 60.9 56.7 42.5 38.9 30.8 43.9
1890 23.6 25.3 27.6 38.3 48.9 56.3 62.9 61.7 56.2 45.6 34.5 17.8 41.6
1891 24.6 24.4 27.3 39.3 47.0 56.6 61.4 63.2 59.5 44.5 34.5 33.4 43.0
1892 20.8 23.0 26.1 39.3 48.7 61.0 64.6 63.6 54.2 45.4 35.2 23.5 42.1
1893 13.3 19.0 27.3 36.8 48.6 57.9 62.5 62.4 52.2 47.7 35.1 23.1 40.5
1894 23.1 19.3 35.1 40.1 49.3 59.4 65.1 60.2 57.7 47.4 31.9 25.5 42.8
1895 21.8 16.6 28.0 38.1 50.5 60.0 61.7 62.7 57.6 41.4 38.3 28.3 42.1
1896 19.2 20.6 24.4 39.1 50.8 57.8 64.0 63.1 54.6 43.7 38.5 23.1 41.6
1897 20.8 24.2 29.3 39.7 49.7 54.0 64.1 61.9 54.2 45.5 33.2 27.7 42.0
1898 21.5 25.8 35.8 37.2 48.8 57.9 64.0 65.4 57.3 47.3 35.7 25.0 43.5
1899 20.0 19.5 27.4 38.8 49.0 60.3 63.6 61.4 53.7 47.3 35.1 29.1 42.1
1900 20.6 21.6 24.5 39.8 45.4 59.1 64.9 63.2 57.6 49.8 37.5 26.2 42.5
1901 20.5 17.4 29.5 39.0 47.6 59.1 65.4 64.0 57.2 45.6 30.9 25.3 41.8
1902 19.8 22.6 36.4 40.9 48.6 54.8 60.7 60.1 56.2 45.7 37.9 20.5 42.0
1903 21.3 24.4 36.4 40.1 49.5 53.4 63.2 58.5 56.0 46.9 33.0 21.3 42.0
1904 14.1 13.8 27.2 36.7 52.2 56.0 63.6 61.1 54.3 42.2 30.9 18.7 39.2
1905 17.7 15.7 29.1 38.2 48.9 56.7 65.4 61.6 54.9 45.7 33.4 27.6 41.2
1906 28.2 21.6 25.0 39.6 49.0 57.6 63.6 64.7 56.6 45.8 35.3 21.5 42.4
1907 19.4 13.0 30.5 35.4 44.7 56.5 64.0 61.7 57.3 41.5 37.4 30.5 41.0
1908 22.5 18.9 30.6 37.9 50.8 60.1 65.4 62.6 57.8 47.6 36.2 25.6 43.0
1909 22.5 24.7 29.9 39.4 48.3 61.0 62.8 61.9 55.4 45.3 39.2 25.1 43.0
1910 24.9 21.3 34.3 43.8 50.5 57.5 66.6 61.7 55.3 47.4 35.8 20.2 43.3
1911 24.0 19.5 27.8 38.0 52.8 57.9 68.2 61.7 55.2 46.0 34.2 33.0 43.2
1912 14.1 20.2 27.6 38.9 50.5 58.1 64.5 61.1 56.0 49.0 38.3 31.8 42.5
1913 30.6 19.1 32.9 41.3 47.5 57.7 64.6 62.3 54.1 51.1 39.3 30.7 44.3
1914 20.9 16.7 29.9 36.8 51.0 58.3 61.1 63.0 55.3 48.6 34.7 23.7 41.7
1915 26.6 25.9 27.3 42.1 48.0 56.5 63.0 61.9 59.2 48.2 38.4 28.1 43.8
1916 24.4 18.0 23.7 38.9 50.5 55.4 65.0 63.7 55.9 46.7 34.9 26.9 42.0
1917 22.8 17.9 30.0 37.9 43.7 57.2 65.6 64.8 52.4 44.2 31.9 15.9 40.4
1918 14.1 17.2 27.8 39.6 53.2 55.9 63.0 62.6 53.5 47.8 38.6 28.3 41.8
1919 25.6 25.4 33.3 39.5 50.7 58.5 66.1 61.2 55.8 47.4 35.6 21.3 43.4
1920 12.5 20.6 30.5 38.0 47.5 57.6 63.4 65.2 57.6 51.0 35.0 29.5 42.4
1921 24.2 25.5 36.7 44.0 50.0 59.3 66.2 61.6 60.1 46.6 35.4 24.1 44.5
1922 20.3 24.3 31.8 39.7 52.0 60.8 64.4 63.4 57.1 46.3 37.4 24.5 43.5
1923 19.5 16.6 25.2 38.4 48.6 59.6 62.2 60.7 56.8 47.5 37.8 34.3 42.3
1924 23.3 19.8 31.6 39.6 48.8 58.2 64.8 64.2 54.4 45.9 37.1 23.4 42.6
1925 19.5 30.8 34.6 41.2 48.4 61.1 64.2 62.3 56.0 41.9 36.0 27.7 43.6
1926 23.7 20.5 27.0 36.2 47.7 55.6 62.6 63.2 54.8 44.6 36.2 21.1 41.1
1927 23.3 26.0 33.6 38.7 47.9 56.6 64.1 59.8 56.5 49.3 41.7 28.1 43.8
1928 26.0 21.3 29.4 37.8 47.9 57.5 65.3 66.1 54.9 47.3 37.3 32.2 43.6
1929 21.2 25.1 33.0 39.7 50.0 59.2 62.9 60.1 56.7 44.5 38.2 26.1 43.1
1930 24.3 25.1 30.7 38.3 50.5 62.8 64.6 62.6 60.3 45.5 38.2 26.9 44.2
1931 23.1 23.0 33.8 41.6 50.5 58.9 66.7 64.7 58.7 50.1 42.1 29.0 45.2
1932 32.4 23.4 28.0 39.2 50.6 57.2 63.5 65.4 57.0 50.0 34.5 30.5 44.3
1933 30.7 25.5 29.8 39.7 52.5 59.7 62.4 64.0 58.1 44.5 29.9 18.8 43.0
1934 21.9 7.9 26.2 39.7 51.0 58.1 64.7 59.5 58.7 43.0 38.3 21.0 40.8
1935 14.8 19.5 29.9 38.5 47.0 57.7 65.4 62.7 53.6 44.9 39.3 20.9 41.2
1936 21.0 15.5 34.4 37.8 50.2 58.2 62.2 61.4 55.2 46.1 31.5 27.0 41.7
1937 29.5 26.6 26.5 38.3 50.1 58.6 64.7 66.3 55.3 44.9 36.7 25.0 43.5
1938 20.8 23.1 30.9 40.2 47.8 58.4 64.2 65.2 54.2 48.6 38.4 27.9 43.3
1939 20.7 23.7 26.1 36.9 48.1 58.2 63.6 66.2 55.6 45.2 33.0 26.4 42.0
1940 16.4 23.2 26.7 36.5 48.8 56.7 63.2 60.3 55.3 42.4 36.3 26.7 41.0
1941 18.9 22.3 26.2 42.4 50.5 59.1 63.8 61.3 55.8 47.1 39.3 27.8 42.9
1942 20.7 19.8 34.3 40.9 52.0 59.4 63.4 63.0 56.9 48.1 36.0 21.7 43.0
1943 19.4 22.4 28.4 35.2 49.4 60.9 65.5 63.1 55.3 46.7 36.5 21.2 42.0
1944 24.8 21.4 26.7 37.5 53.5 58.2 65.1 65.1 57.3 45.4 36.1 23.4 42.9
1945 16.1 23.7 37.6 43.9 47.4 58.0 64.1 62.1 58.4 44.3 38.3 22.2 43.0
1946 20.5 18.6 37.3 38.7 48.7 57.9 62.0 60.6 57.7 48.7 40.5 26.3 43.1
1947 24.3 21.4 30.4 38.6 47.9 56.3 66.5 64.5 56.1 51.6 34.7 23.0 42.9
1948 16.4 18.3 28.9 39.4 47.8 55.5 65.1 65.1 56.2 46.2 43.2 30.0 42.7
1949 27.6 26.8 31.2 42.5 50.7 61.4 67.3 65.5 55.3 50.2 36.0 29.4 45.3
1950 27.6 20.5 24.9 38.6 47.3 58.7 64.5 62.8 53.6 48.2 40.0 29.0 43.0
1951 26.0 26.4 32.8 42.8 49.8 58.0 65.5 62.5 57.0 47.8 34.8 27.5 44.2
1952 24.8 26.1 31.3 42.7 49.2 61.5 68.2 64.2 57.6 44.1 38.6 29.9 44.9
1953 28.0 27.6 32.3 42.1 50.1 60.5 64.4 63.1 57.6 48.2 41.3 32.2 45.6
1954 18.5 28.9 30.9 40.3 49.3 59.0 63.9 61.8 55.9 50.8 37.4 27.5 43.7
1955 22.2 24.9 30.4 42.1 52.3 58.5 67.9 66.5 55.8 47.9 36.4 20.0 43.7
1956 25.5 26.2 27.5 37.9 45.3 59.7 63.7 63.4 54.1 46.4 38.2 28.7 43.0
1957 15.1 27.3 32.3 40.8 50.7 61.5 65.3 61.1 58.6 46.7 40.2 33.2 44.4
1958 24.7 19.0 34.4 41.2 48.6 56.2 64.9 63.8 56.3 45.3 39.1 19.3 42.7
1959 20.8 18.0 29.3 41.0 52.5 56.4 66.1 66.4 59.7 47.9 36.8 30.1 43.8
1960 24.7 28.4 25.8 40.3 52.0 61.0 64.3 64.4 56.9 46.0 40.6 21.8 43.8
1961 17.7 23.9 29.6 38.3 48.2 59.3 64.3 64.3 61.1 49.5 38.6 27.1 43.5
1962 20.6 18.8 31.6 39.7 48.7 59.2 62.3 62.3 54.8 46.8 35.2 22.6 41.9
1963 22.4 17.4 31.9 39.9 49.5 59.7 65.7 61.6 52.8 50.1 41.9 20.3 42.8
1964 24.7 22.0 31.6 38.6 50.2 57.6 63.5 58.3 54.0 44.0 36.7 25.9 42.3
1965 18.0 20.4 29.5 36.4 49.4 57.6 62.3 61.5 55.2 44.4 35.3 29.8 41.6
1966 22.5 24.8 32.5 39.3 49.3 60.4 65.8 63.6 56.2 46.2 40.4 27.6 44.0
1967 28.7 18.8 27.5 36.8 44.1 58.0 66.4 64.2 54.3 46.1 34.2 28.9 42.3
1968 18.2 18.9 32.2 42.4 49.3 58.4 66.5 63.4 59.2 51.2 38.6 24.7 43.6
1969 23.4 25.0 29.5 41.8 50.3 61.3 64.7 65.6 56.5 47.0 39.2 27.9 44.4
1970 16.6 24.1 30.9 41.1 50.8 58.0 65.5 64.6 57.3 48.0 39.4 22.2 43.2
1971 16.6 24.1 30.0 36.5 47.6 59.0 64.4 64.5 60.5 52.4 36.2 28.9 43.4
1972 25.0 21.8 30.1 37.5 49.4 57.9 65.5 62.9 57.7 44.5 36.3 27.1 43.0
1973 23.7 22.9 36.4 41.9 49.6 61.4 66.2 66.9 56.4 48.2 39.5 32.4 45.5
1974 24.6 21.5 30.2 41.7 47.6 56.4 64.1 64.5 56.5 41.0 38.5 32.1 43.2
1975 28.4 25.6 29.9 37.2 52.0 60.1 67.3 65.4 56.5 49.7 44.2 26.4 45.2
1976 18.1 28.4 32.8 45.2 51.0 63.9 65.0 63.7 55.9 45.1 35.0 20.7 43.7
1977 16.7 24.8 36.8 41.4 52.2 59.0 65.7 64.5 57.7 48.5 42.6 27.7 44.8
1978 21.3 20.1 29.6 41.8 52.1 59.0 63.5 65.0 52.8 44.5 37.1 28.5 42.9
1979 25.8 15.8 35.0 41.7 53.7 59.1 66.1 64.7 57.0 45.3 41.2 29.1 44.5
1980 23.2 20.7 29.2 41.2 51.2 57.6 66.9 66.4 58.1 45.1 33.5 19.5 42.7
1981 14.3 28.7 31.7 42.6 51.3 62.4 66.5 63.8 55.8 44.0 37.6 28.5 43.9
1982 15.2 24.3 30.9 38.2 50.8 56.3 66.3 62.6 56.9 46.0 40.1 32.6 43.3
1983 24.8 25.7 33.9 42.7 50.8 61.6 68.7 65.5 61.7 47.8 38.9 24.6 45.6
1984 20.9 31.0 25.9 39.8 49.8 61.3 65.8 66.8 52.7 46.3 37.0 31.9 44.1
1985 17.5 25.5 31.8 40.9 49.8 57.2 65.1 63.5 57.6 47.5 39.0 24.5 43.3
1986 23.1 22.9 31.3 42.1 50.0 56.7 63.5 62.7 55.0 46.0 33.9 29.3 43.0
1987 22.2 21.0 31.7 39.4 48.2 56.9 64.1 62.3 58.2 46.1 36.1 29.8 43.0
1988 20.5 24.7 30.8 40.7 49.9 59.2 64.8 67.3 55.9 43.3 38.7 25.1 43.4
1989 26.4 23.3 29.3 38.2 51.3 60.3 64.4 64.0 57.1 46.8 35.7 14.1 42.6
1990 29.5 25.0 31.4 40.1 47.5 58.3 65.2 66.3 56.9 49.9 40.1 32.6 45.2
1991 22.2 27.8 34.3 42.2 53.2 60.7 66.5 65.6 55.7 48.5 39.2 28.5 45.4
1992 23.8 24.8 28.1 38.6 47.6 58.8 61.5 62.7 56.0 44.7 36.7 28.3 42.6
1993 25.4 19.0 29.5 41.3 52.0 59.1 65.8 65.8 57.4 44.5 37.2 27.6 43.7
1994 13.4 19.7 31.4 42.3 49.3 61.9 68.8 63.8 57.0 47.1 40.6 31.4 43.9
1995 28.1 20.8 32.5 38.3 49.1 60.2 67.1 64.1 55.1 50.3 35.3 25.6 43.9
1996 22.7 24.3 28.9 40.3 48.9 60.3 64.3 64.0 58.1 45.8 33.8 33.0 43.7
1997 21.7 29.0 29.7 38.9 48.0 59.6 64.8 63.5 56.5 45.1 35.9 28.6 43.4
1998 28.1 29.5 34.3 42.1 51.9 57.3 66.1 64.7 58.1 47.3 38.4 31.9 45.8
1999 21.5 26.4 31.5 41.1 50.7 62.0 67.2 63.7 59.9 44.6 40.4 30.7 45.0
2000 19.3 26.9 35.5 40.2 48.5 59.2 62.8 63.4 55.4 46.0 38.4 22.5 43.2
2001 23.7 24.2 29.9 40.7 51.1 62.4 61.9 66.7 57.2 47.4 40.5 34.6 45.0
2002 31.0 28.0 32.6 40.8 48.7 58.0 66.3 67.3 60.6 48.1