| January | February | March | April | May | June | July | August | September | October | November | December | TO-DAY | |
| Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | Min Temp | AVERAGES | |
| 1897 | -0.65 | 0.93 | 5.53 | 30.97 | 41.00 | 26.93 | 0.00 | 0.00 | 48.10 | 31.65 | 13.37 | 7.90 | 17.14 |
| 1898 | 6.84 | 6.54 | 7.70 | 30.80 | 33.26 | 46.50 | 52.81 | 55.55 | 40.43 | 29.00 | 13.07 | 7.52 | 26.70 |
| 1899 | 0.84 | -9.79 | -1.67 | 25.37 | 37.74 | 49.07 | 53.90 | 52.00 | 40.90 | 30.71 | 24.20 | 6.65 | 25.89 |
| 1900 | 11.90 | 0.11 | 15.63 | 34.10 | 44.81 | 53.33 | 54.39 | 56.81 | 45.03 | 34.35 | 13.80 | 18.32 | 31.42 |
| 1901 | 6.35 | 1.43 | 19.27 | 33.00 | 45.48 | 46.80 | 58.90 | 55.26 | 42.20 | 33.16 | 19.17 | 8.19 | 30.82 |
| 1902 | 4.48 | 2.14 | 18.60 | 27.23 | 42.06 | 39.93 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.71 |
| 1903 | 0.00 | 15.04 | 30.17 | 38.81 | 48.23 | 53.32 | 51.71 | 41.00 | 35.03 | 16.40 | 10.29 | 29.39 | |
| 1904 | -1.94 | -6.69 | 8.30 | 28.70 | 39.55 | 47.53 | 49.35 | 49.06 | 40.07 | 31.29 | 20.60 | 7.03 | 26.33 |
| 1905 | -5.71 | -3.61 | 22.37 | 24.10 | 36.35 | 45.70 | 52.39 | 55.55 | 42.77 | 27.00 | 20.87 | 7.71 | 27.06 |
| 1906 | 4.61 | 5.29 | 7.60 | 33.27 | 38.81 | 48.90 | 50.87 | 53.65 | 44.60 | 31.97 | 16.03 | 3.87 | 28.19 |
| 1907 | -13.74 | 3.96 | 15.87 | 21.00 | 29.06 | 47.80 | 53.19 | 49.74 | 38.53 | 30.81 | 17.67 | 10.23 | 25.56 |
| 1908 | 8.87 | 7.59 | 14.23 | 30.27 | 37.00 | 48.67 | 55.03 | 48.58 | 47.00 | 31.32 | 20.47 | 7.10 | 29.36 |
| 1909 | -2.65 | 6.25 | 18.53 | 22.43 | 38.10 | 51.23 | 55.52 | 54.61 | 44.57 | 30.87 | 18.03 | 0.03 | 28.22 |
| 1910 | 2.00 | -8.43 | 28.07 | 34.27 | 36.74 | 51.57 | 54.52 | 47.97 | 42.00 | 31.68 | 16.70 | 6.94 | 28.63 |
| 1911 | -7.55 | -3.82 | 19.50 | 26.27 | 39.58 | 54.27 | 49.81 | 48.68 | 42.13 | 30.74 | 7.60 | 10.48 | 26.64 |
| 1912 | -8.35 | 3.62 | 1.47 | 30.83 | 40.35 | 46.87 | 52.10 | 50.48 | 38.10 | 28.77 | 20.47 | 11.77 | 26.39 |
| 1913 | -3.19 | 1.43 | 6.67 | 31.73 | 37.94 | 52.47 | 50.48 | 52.52 | 42.00 | 27.90 | 22.60 | 11.39 | 27.72 |
| 1914 | 7.90 | -3.71 | 15.60 | 29.67 | 39.06 | 49.80 | 55.87 | 49.71 | 42.70 | 32.74 | 20.90 | -3.10 | 28.07 |
| 1915 | 1.87 | 10.11 | 9.97 | 35.47 | 37.58 | 43.67 | 49.65 | 48.77 | 41.10 | 32.71 | 20.50 | 9.84 | 28.41 |
| 1916 | -13.87 | 4.10 | 15.20 | 29.80 | 37.87 | 45.13 | 57.71 | 52.29 | 40.77 | 27.55 | 17.80 | -5.81 | 25.92 |
| 1917 | -1.68 | -7.07 | 12.93 | 26.13 | 33.97 | 45.93 | 55.87 | 47.74 | 39.40 | 25.00 | 24.83 | -6.10 | 24.84 |
| 1918 | -7.74 | -0.32 | 24.07 | 29.87 | 37.87 | 50.80 | 52.16 | 52.39 | 38.57 | 34.32 | 19.93 | 11.94 | 28.36 |
| 1919 | 19.29 | 3.14 | 11.27 | 31.13 | 41.35 | 54.33 | 56.90 | 52.90 | 44.57 | 21.45 | 11.63 | 3.23 | 29.20 |
| 1920 | 0.97 | 7.97 | 16.47 | 22.23 | 40.03 | 48.53 | 53.74 | 51.68 | 41.87 | 34.74 | 16.07 | 5.65 | 28.40 |
| 1921 | 5.94 | 11.29 | 15.30 | 25.30 | 41.06 | 56.07 | 55.68 | 50.87 | 42.40 | 31.58 | 14.23 | 8.84 | 29.77 |
| 1922 | -1.94 | -11.39 | 15.73 | 30.53 | 41.52 | 51.27 | 50.74 | 53.29 | 42.47 | 29.23 | 25.33 | 1.32 | 27.53 |
| 1923 | 4.94 | -6.18 | 10.80 | 26.67 | 38.94 | 50.97 | 57.45 | 48.00 | 43.37 | 31.61 | 23.00 | 11.03 | 28.32 |
| 1924 | -6.48 | 11.97 | 15.77 | 29.17 | 33.03 | 45.77 | 52.26 | 46.77 | 39.10 | 33.90 | 19.73 | -2.58 | 26.67 |
| 1925 | -1.06 | 10.61 | 18.73 | 33.50 | 38.81 | 49.23 | 51.06 | 49.94 | 41.27 | 20.58 | 19.00 | 8.58 | 28.22 |
| 1926 | 8.23 | 15.64 | 14.47 | 25.60 | 44.26 | 46.60 | 53.39 | 49.42 | 35.70 | 29.61 | 16.37 | -0.87 | 28.20 |
| 1927 | 2.68 | 5.61 | 19.77 | 28.77 | 38.19 | 48.80 | 52.00 | 48.00 | 42.67 | 32.39 | 12.03 | -13.90 | 26.55 |
| 1928 | 1.55 | 5.21 | 20.77 | 24.50 | 42.45 | 44.43 | 54.42 | 48.58 | 37.30 | 28.03 | 16.80 | 8.58 | 27.63 |
| 1929 | -17.52 | -10.29 | 17.97 | 25.07 | 32.68 | 46.97 | 53.06 | 48.26 | 39.30 | 32.94 | 16.67 | 0.90 | 24.13 |
| 1930 | -12.97 | 13.43 | 14.40 | 32.63 | 36.35 | 48.43 | 53.81 | 53.48 | 38.80 | 28.16 | 17.00 | 12.10 | 27.67 |
| 1931 | 12.00 | 17.29 | 14.53 | 29.57 | 37.94 | 53.90 | 54.87 | 51.77 | 41.70 | 32.55 | 17.30 | 11.74 | 30.99 |
| 1932 | 1.23 | 3.45 | 10.83 | 32.37 | 41.74 | 52.87 | 53.61 | 52.94 | 36.97 | 27.23 | 16.33 | 4.26 | 28.06 |
| 1933 | 1.19 | -4.46 | 22.37 | 27.07 | 41.03 | 53.17 | 56.13 | 50.94 | 42.93 | 28.81 | 21.23 | 3.00 | 28.57 |
| 1934 | 7.61 | 12.21 | 16.37 | 29.27 | 45.97 | 48.50 | 55.58 | 49.94 | 35.27 | 33.39 | 19.73 | 5.77 | 29.86 |
| 1935 | -3.06 | 14.36 | 15.83 | 25.70 | 37.90 | 47.07 | 57.13 | 48.74 | 39.03 | 26.58 | 10.10 | 5.74 | 27.31 |
| 1936 | -11.26 | -23.31 | 18.53 | 21.67 | 43.48 | 51.00 | 63.48 | 53.55 | 41.93 | 27.48 | 18.63 | 5.55 | 26.00 |
| 1937 | -17.35 | -4.43 | 14.07 | 28.00 | 41.84 | 49.50 | 58.29 | 53.94 | 44.10 | 33.52 | 14.93 | 2.13 | 26.50 |
| 1938 | 4.35 | -5.71 | 20.20 | 27.13 | 40.29 | 51.70 | 54.23 | 49.39 | 43.77 | 35.68 | 14.80 | 9.29 | 28.59 |
| 1939 | 9.52 | -13.71 | 9.07 | 28.20 | 43.06 | 45.37 | 55.52 | 46.81 | 41.67 | 27.71 | 17.10 | 12.81 | 27.05 |
| 1940 | -10.52 | 4.14 | 16.30 | 26.53 | 38.06 | 48.20 | 56.81 | 50.32 | 44.77 | 36.06 | 11.80 | 11.61 | 27.78 |
| 1941 | 3.23 | 2.43 | 15.23 | 31.50 | 44.58 | 49.70 | 54.45 | 50.45 | 38.67 | 29.06 | 20.47 | 12.13 | 29.21 |
| 1942 | 6.23 | 4.25 | 19.63 | 30.73 | 35.97 | 46.27 | 53.35 | 51.16 | 39.03 | 30.13 | 16.10 | 3.94 | 28.15 |
| 1943 | -9.84 | 7.14 | 5.07 | 30.77 | 35.65 | 47.87 | 54.71 | 51.94 | 44.00 | 29.23 | 18.87 | 9.61 | 27.17 |
| 1944 | 8.48 | 0.90 | 7.27 | 29.57 | 42.84 | 48.50 | 50.97 | 48.45 | 39.80 | 28.77 | 12.77 | 6.48 | 27.07 |
| 1945 | 6.13 | 3.75 | 20.27 | 24.33 | 32.81 | 44.93 | 52.00 | 49.26 | 37.00 | 28.71 | 14.10 | 1.77 | 26.32 |
| 1946 | 4.65 | 4.96 | 27.23 | 33.10 | 36.61 | 48.27 | 56.03 | 48.32 | 40.20 | 27.29 | 14.50 | 7.81 | 28.87 |
| 1947 | 8.55 | -0.71 | 12.70 | 27.73 | 34.74 | 47.20 | 55.81 | 54.90 | 40.30 | 35.52 | 15.27 | 8.32 | 28.40 |
| 1948 | 5.48 | -0.93 | 10.43 | 29.07 | 41.84 | 49.90 | 55.45 | 54.65 | 47.97 | 31.48 | 21.13 | 3.68 | 29.12 |
| 1949 | -10.71 | -7.32 | 12.90 | 31.10 | 41.74 | 46.70 | 53.58 | 52.97 | 36.90 | 30.23 | 24.10 | -1.39 | 26.15 |
| 1950 | -20.06 | 0.61 | 9.93 | 23.13 | 35.97 | 46.80 | 50.55 | 49.23 | 43.10 | 32.39 | 11.37 | 3.71 | 24.07 |
| 1951 | -2.94 | 2.89 | 2.40 | 24.73 | 39.26 | 44.30 | 52.68 | 50.10 | 40.13 | 30.42 | 13.93 | -3.71 | 24.48 |
| 1952 | -4.35 | 9.10 | 6.73 | 32.50 | 39.23 | 50.17 | 52.52 | 52.42 | 44.87 | 25.55 | 16.53 | 8.65 | 27.57 |
| 1953 | 8.61 | 10.61 | 16.60 | 24.57 | 38.06 | 51.83 | 53.94 | 53.74 | 40.50 | 34.26 | 25.00 | 13.13 | 30.65 |
| 1954 | -7.52 | 23.75 | 8.23 | 26.40 | 37.39 | 48.17 | 56.71 | 52.61 | 42.63 | 31.32 | 23.33 | 14.42 | 29.85 |
| 1955 | 3.97 | -0.75 | 10.70 | 32.93 | 42.61 | 49.07 | 56.71 | 55.94 | 39.77 | 32.68 | 5.50 | -1.68 | 27.48 |
| 1956 | -0.77 | 1.69 | 16.50 | 22.40 | 41.13 | 52.97 | 53.39 | 51.81 | 41.23 | 31.77 | 20.47 | 10.71 | 28.52 |
| 1957 | -8.97 | 3.11 | 18.47 | 26.97 | 39.97 | 48.83 | 59.39 | 55.35 | 41.13 | 35.84 | 21.43 | 17.39 | 29.80 |
| 1958 | 12.03 | 2.96 | 15.20 | 30.77 | 42.03 | 46.17 | 50.42 | 53.68 | 40.57 | 29.87 | 17.87 | 5.06 | 28.96 |
| 1959 | -2.23 | -7.43 | 21.23 | 28.27 | 37.97 | 51.17 | 53.19 | 52.35 | 41.93 | 26.74 | 12.40 | 18.10 | 27.90 |
| 1960 | -1.19 | 5.17 | 8.20 | 28.93 | 38.61 | 47.90 | 54.90 | 51.65 | 42.27 | 28.58 | 14.03 | 6.71 | 27.20 |
| 1961 | 7.61 | 9.54 | 23.17 | 24.70 | 39.90 | 52.10 | 55.84 | 56.00 | 38.60 | 30.29 | 16.57 | -4.23 | 29.02 |
| 1962 | 0.45 | 2.07 | 11.17 | 29.80 | 41.77 | 50.57 | 52.26 | 52.10 | 40.40 | 35.39 | 23.67 | 9.65 | 29.10 |
| 1963 | -8.29 | 7.04 | 22.43 | 30.30 | 38.94 | 53.10 | 56.61 | 54.42 | 47.70 | 37.97 | 16.77 | 0.48 | 29.74 |
| 1964 | 6.42 | 10.31 | 8.53 | 28.93 | 42.39 | 50.23 | 56.58 | 49.81 | 37.93 | 31.00 | 10.63 | -5.29 | 27.48 |
| 1965 | -4.32 | -1.61 | 2.40 | 29.50 | 39.23 | 51.07 | 56.13 | 51.71 | 33.83 | 33.68 | 16.23 | 12.03 | 26.72 |
| 1966 | -11.81 | -1.43 | 18.47 | 24.77 | 37.97 | 49.93 | 58.48 | 50.23 | 46.10 | 31.87 | 11.13 | 8.58 | 27.00 |
| 1967 | 3.48 | 0.79 | 16.80 | 26.47 | 34.77 | 47.83 | 51.19 | 51.32 | 43.43 | 30.39 | 18.03 | 5.00 | 27.42 |
| 1968 | -0.13 | 3.45 | 20.97 | 24.30 | 34.55 | 47.53 | 52.29 | 50.55 | 41.03 | 30.35 | 20.03 | 0.26 | 27.12 |
| 1969 | -10.87 | 3.54 | 11.07 | 33.87 | 39.52 | 44.90 | 54.42 | 55.74 | 44.27 | 27.87 | 18.60 | 11.10 | 27.78 |
| 1970 | -4.94 | 4.93 | 9.77 | 27.67 | 39.23 | 51.23 | 55.23 | 52.39 | 40.60 | 27.13 | 17.20 | 4.90 | 27.16 |
| 1971 | -5.52 | 5.07 | 18.10 | 29.80 | 37.90 | 50.57 | 48.61 | 53.00 | 40.13 | 30.03 | 20.60 | 0.71 | 27.40 |
| 1972 | -6.19 | -1.03 | 16.77 | 27.17 | 42.39 | 50.70 | 48.65 | 51.94 | 37.33 | 25.77 | 18.67 | -0.06 | 26.11 |
| 1973 | 6.61 | 10.39 | 23.97 | 27.83 | 37.19 | 48.23 | 50.81 | 52.65 | 39.40 | 33.42 | 10.57 | 7.87 | 28.85 |
| 1974 | -0.13 | 10.29 | 14.77 | 29.73 | 37.48 | 48.20 | 56.48 | 46.03 | 36.03 | 30.97 | 19.93 | 12.48 | 28.55 |
| 1975 | 4.71 | 2.25 | 8.70 | 25.50 | 40.32 | 49.07 | 56.77 | 50.06 | 38.67 | 30.32 | 16.10 | 8.74 | 27.67 |
| 1976 | 3.97 | 17.90 | 13.90 | 33.03 | 38.74 | 51.47 | 54.55 | 54.94 | 42.60 | 26.35 | 11.47 | 5.35 | 29.38 |
| 1977 | -10.52 | 15.89 | 21.87 | 32.40 | 47.39 | 52.13 | 54.13 | 46.00 | 43.33 | 31.45 | 13.37 | -0.19 | 28.97 |
| 1978 | -10.23 | -0.75 | 16.97 | 31.53 | 42.55 | 48.67 | 52.71 | 49.77 | 44.63 | 29.65 | 9.63 | -3.10 | 26.23 |
| 1979 | -12.29 | -9.32 | 12.90 | 25.50 | 34.81 | 48.53 | 55.06 | 51.10 | 42.30 | 31.19 | 12.93 | 11.00 | 25.38 |
| 1980 | -2.35 | 6.93 | 12.83 | 30.80 | 41.32 | 50.30 | 54.61 | 50.48 | 40.57 | 31.42 | 22.40 | 6.26 | 28.53 |
| 1981 | 13.35 | 10.75 | 19.17 | 30.77 | 41.39 | 46.97 | 55.71 | 54.61 | 40.30 | 28.52 | 21.87 | 8.97 | 30.84 |
| 1982 | -14.97 | -1.25 | 12.73 | 25.03 | 39.97 | 46.50 | 53.84 | 50.35 | 38.17 | 30.29 | 13.03 | 9.19 | 25.67 |
| 1983 | 13.16 | 16.57 | 20.70 | 24.43 | 34.39 | 46.23 | 55.87 | 57.65 | 39.67 | 30.19 | 19.97 | -10.42 | 28.78 |
| 1984 | 5.97 | 16.55 | 14.90 | 27.10 | 35.29 | 49.10 | 53.61 | 55.06 | 34.33 | 27.61 | 13.20 | -5.65 | 27.37 |
| 1985 | -3.90 | 0.79 | 16.03 | 28.93 | 40.71 | 41.63 | 50.06 | 46.74 | 39.53 | 28.26 | 3.93 | -0.45 | 24.59 |
| 1986 | 13.52 | 2.29 | 26.23 | 27.17 | 38.81 | 50.13 | 49.61 | 46.90 | 40.93 | 30.10 | 10.53 | 11.97 | 28.68 |
| 1987 | 9.87 | 18.82 | 18.13 | 33.00 | 41.87 | 49.03 | 56.00 | 47.71 | 37.83 | 24.10 | 17.47 | 6.65 | 29.94 |
| 1988 | -5.06 | -1.03 | 15.33 | 21.93 | 43.10 | 58.83 | 54.03 | 50.29 | 39.03 | 26.45 | 16.53 | 6.45 | 27.37 |
| 1989 | 6.06 | -7.96 | 13.03 | 28.57 | 37.68 | 44.07 | 58.23 | 52.55 | 37.83 | 29.29 | 17.13 | -1.06 | 26.37 |
| 1990 | 12.32 | 6.32 | 18.47 | 25.73 | 36.48 | 47.77 | 50.39 | 51.32 | 41.17 | 21.87 | 13.77 | -6.42 | 26.58 |
| 1991 | -6.74 | 12.32 | 15.17 | 32.27 | 43.29 | 53.17 | 54.68 | 54.26 | 41.10 | 24.29 | 14.50 | 11.32 | 28.94 |
| 1992 | 12.26 | 16.21 | 21.23 | 26.63 | 38.90 | 47.73 | 48.87 | 46.97 | 38.03 | 27.68 | 19.10 | -0.65 | 28.61 |
| 1993 | -7.03 | -3.50 | 20.23 | 28.60 | 40.48 | 45.43 | 53.81 | 50.97 | 36.73 | 23.87 | 13.73 | 11.23 | 26.40 |
| 1994 | -5.90 | -5.93 | 19.70 | 28.47 | 43.55 | 49.60 | 51.74 | 50.61 | 42.43 | 32.97 | 15.87 | 8.29 | 27.52 |
| 1995 | 6.06 | 11.57 | 16.93 | 24.67 | 37.03 | 49.90 | 52.35 | 53.90 | 37.17 | 31.16 | 14.93 | 4.84 | 28.31 |
| 1996 | -4.55 | 8.90 | 9.10 | 27.87 | 39.55 | 51.87 | 53.81 | 53.97 | 42.47 | 29.26 | 6.87 | -3.65 | 26.44 |
| 1997 | -7.97 | 8.32 | 12.97 | 22.80 | 36.61 | 51.87 | 56.42 | 51.84 | 42.63 | 30.52 | 16.77 | 13.10 | 27.87 |
| 1998 | 2.39 | 20.18 | 8.93 | 30.73 | 41.26 | 46.23 | 55.87 | 56.03 | 46.60 | 32.06 | 22.03 | 8.19 | 30.65 |
| 1999 | -0.71 | 19.71 | 24.00 | 29.60 | 38.65 | 48.07 | 52.52 | 52.87 | 37.57 | 27.45 | 22.77 | 12.81 | 30.46 |
| 2000 | 3.39 | 10.10 | 21.20 | 27.17 | 39.71 | 45.50 | 56.90 | 54.42 | 40.80 | 29.61 | 10.04 | -3.87 | 28.11 |
| 2001 | 8.16 | -4.75 | 19.37 | 28.13 | 39.06 | 47.93 | 57.13 | 54.74 | 44.70 | 27.55 | 21.53 | 8.48 | 29.24 |
| 2002 | 8.58 | 12.71 | 4.90 | 24.63 | 33.58 | 50.17 | 58.06 | 50.13 | 42.47 | 22.10 | 20.67 | 12.10 | 28.41 |
| 2003 | 2.84 | 2.07 | 12.50 | 31.13 | 39.94 | 47.00 | 55.10 | 55.90 | 39.83 | 30.71 | 8.97 | 11.55 | 28.15 |
| 2004 | -3.19 | 7.21 | 20.77 | 27.83 | 35.10 | 43.23 | 54.39 | 49.16 | 44.27 | 30.16 | 19.93 | 11.03 | 28.31 |
| 2005 | -0.87 | 11.39 | 20.87 | 32.03 | 38.58 | 52.63 | 56.39 | 50.48 | 42.00 | 28.45 | 22.87 | 9.13 | 30.17 |
| 2006 | 18.68 | 8.96 | 17.83 | 32.80 | 40.55 | 51.03 | 58.32 | 54.29 | 40.93 | 26.32 | 16.80 | 5.32 | 30.92 |
| 2007 | 4.61 | 2.89 | 22.39 | 27.40 | 42.48 | 51.37 | 60.06 | 53.52 | 43.03 | 31.71 | 17.70 | 3.81 | 30.15 |
| 2008 | -0.29 | 2.48 | 14.94 | 25.07 | 39.94 | 47.63 | 55.32 | 55.06 | 40.47 | 28.13 | 20.83 | -2.06 | 27.51 |