| Division 1 Mean Temperature and Departures from Normal | ||||||||||||
| Year | January | February | March | April | May | June | July | August | September | October | November | December |
| MEAN (1971-2000) | 23.51 | 25.85 | 34.65 | 45.42 | 56.37 | 64.34 | 69.00 | 67.38 | 59.61 | 48.65 | 38.89 | 28.51 |
| DEPARTURES | ||||||||||||
| 2004 | -6.81 | -1.35 | 1.75 | 0.98 | 5.33 | -1.64 | -1.60 | -0.28 | 3.09 | 0.86* | 2.03* | -0.87* |
| 2003 | -5.41 | -3.55 | -0.35 | -0.72 | -1.77 | -2.14 | 1.00 | 3.62 | 1.59 | -2.15 | 6.51 | 0.59 |
| 2002 | 7.29 | 6.05 | 1.95 | 2.58 | -2.87 | 1.46 | 1.90 | 3.32 | 3.49 | -1.45 | -1.19 | -1.51 |
| 2001 | 0.29 | 1.75 | -3.55 | 0.68 | 0.63 | 1.06 | -3.20 | 2.92 | -0.51 | 1.45 | 4.41 | 6.29 |
| 2000 | -0.71 | 1.25 | 5.65 | -0.12 | 0.83 | -0.04 | -3.90 | -1.78 | -1.01 | 0.55 | -1.89 | -6.61 |
| 1999 | 1.19 | 3.15 | -1.45 | -0.02 | 0.63 | 1.76 | 3.80 | -0.08 | 2.69 | -1.95 | 3.91 | 2.29 |
| 1998 | 7.49 | 6.15 | 2.15 | 1.08 | 4.13 | -1.24 | -1.30 | 0.92 | 2.09 | 1.35 | 0.11 | 5.89 |
| 1997 | -0.41 | 4.95 | -0.15 | -2.52 | -4.27 | 0.06 | -0.50 | -1.38 | -1.51 | -0.75 | -3.89 | 0.69 |
| 1996 | -1.21 | -0.95 | -3.85 | 0.28 | -1.07 | 2.06 | -1.40 | 1.62 | 1.69 | 0.25 | -4.19 | 4.09 |
| 1995 | 6.99 | -3.85 | 3.65 | -0.22 | -0.67 | 3.16 | 3.00 | 3.02 | -0.01 | 5.05 | -4.79 | -5.31 |
| 1994 | -8.41 | -3.85 | -3.05 | 3.18 | -0.77 | 3.46 | 3.90 | -0.88 | 0.19 | 0.25 | 5.61 | 5.39 |
| 1993 | 4.99 | -5.85 | -4.45 | 0.68 | 1.53 | 0.36 | 2.60 | 1.82 | -0.41 | -1.45 | -0.69 | -1.81 |
| 1992 | 3.29 | 2.45 | -2.85 | -1.22 | -1.27 | -1.54 | -1.50 | -2.68 | -0.11 | -3.05 | -0.59 | 0.19 |
| 1991 | 0.19 | 4.05 | 2.35 | 2.68 | 5.43 | 1.46 | 0.30 | 1.42 | -1.21 | 1.75 | 0.71 | 2.69 |
| 1990 | 8.69 | 4.25 | 2.85 | 1.08 | -2.57 | 0.66 | 0.40 | 0.02 | -0.91 | 4.35 | 1.71 | 4.49 |
| 1989 | 4.79 | -0.95 | -0.55 | -3.12 | -1.37 | -0.64 | -1.50 | -2.28 | 0.39 | 1.05 | -1.19 | -13.41 |
| 1988 | -4.41 | -1.45 | 0.15 | -1.62 | 0.23 | -1.74 | 2.80 | 2.12 | -2.51 | -5.55 | 1.61 | -1.81 |
| 1987 | -1.41 | -3.15 | 0.55 | 0.68 | -0.67 | 0.76 | 0.70 | -3.18 | -1.31 | -4.15 | 0.21 | 1.89 |
| 1986 | 1.09 | -2.25 | 1.25 | 0.38 | 2.53 | -2.24 | -1.60 | -3.08 | -2.21 | -0.35 | -4.59 | -0.11 |
| 1985 | -3.31 | 1.95 | 2.75 | 3.48 | 2.13 | -2.74 | -0.90 | -0.58 | 1.89 | 1.65 | 2.51 | -4.51 |
| 1984 | -3.11 | 6.85 | -6.75 | -1.62 | -2.87 | 1.16 | -2.00 | 1.92 | -3.01 | 4.15 | -0.59 | 6.29 |
| 1983 | 1.99 | 2.15 | 2.95 | -1.92 | -2.67 | 0.26 | 0.50 | 2.12 | 1.59 | 0.75 | 0.91 | -3.81 |
| 1982 | -7.01 | 0.25 | -1.85 | -2.22 | 2.03 | -2.54 | -0.40 | -3.38 | 0.49 | 0.95 | 3.01 | 6.29 |
| 1981 | -6.41 | 6.15 | -1.25 | 2.98 | 0.73 | 0.76 | 0.50 | -0.38 | -0.11 | -2.75 | 0.51 | -2.11 |
| 1980 | 1.89 | -4.25 | -2.45 | 1.48 | 1.93 | -2.54 | 1.00 | 3.72 | 2.59 | -2.35 | -3.99 | -5.01 |
| 1979 | -0.21 | -9.95 | 3.75 | 0.48 | 0.93 | -1.64 | -0.20 | 0.32 | 0.29 | -0.15 | 4.21 | 3.29 |
| 1978 | -2.51 | -8.55 | -3.85 | -1.52 | -0.77 | -0.94 | -1.80 | 2.22 | -1.11 | -1.15 | 0.61 | -0.11 |
| 1977 | -9.71 | -0.05 | 3.95 | 2.08 | 2.23 | -2.14 | 0.20 | -0.18 | 1.59 | -1.35 | 2.21 | -2.91 |
| 1976 | -4.81 | 6.25 | 3.45 | 2.78 | -2.67 | 2.96 | -2.80 | -1.18 | -1.61 | -3.25 | -5.49 | -6.91 |
| 1975 | 4.29 | 2.25 | -2.25 | -5.42 | 3.83 | 0.56 | 0.40 | 0.02 | -3.51 | 3.75 | 5.21 | -0.41 |
| 1974 | 3.49 | -1.65 | -0.65 | 2.88 | -1.87 | -1.04 | -0.60 | -0.28 | -0.91 | -2.85 | 1.71 | 2.69 |
| 1973 | 4.79 | -1.75 | 6.35 | 1.68 | -4.07 | 2.86 | 0.90 | 2.22 | 0.69 | 2.95 | 1.71 | 1.89 |
| 1972 | 3.29 | -3.35 | -3.15 | -3.62 | 1.13 | -2.84 | 0.80 | -0.68 | 1.19 | -3.95 | -3.19 | 2.99 |
| 1971 | -4.81 | -0.35 | -3.15 | -2.82 | -2.77 | 1.56 | -1.50 | -1.38 | 3.99 | 6.25 | -1.29 | 3.89 |
| 1970 | -6.81 | -2.05 | -4.75 | -0.62 | 2.03 | -1.34 | 0.40 | 0.62 | 2.59 | 2.85 | 2.21 | -1.51 |
| 1969 | -0.61 | -0.75 | -2.85 | 1.98 | -0.07 | 0.46 | -1.10 | 0.22 | 0.89 | -0.35 | -1.49 | -4.21 |
| 1968 | -5.41 | -4.25 | 2.75 | 3.68 | -3.67 | -0.74 | 1.20 | 0.42 | 1.79 | 2.45 | -0.19 | -3.11 |
| 1967 | 5.49 | -4.75 | -3.45 | 0.08 | -7.47 | 2.76 | -0.60 | -1.38 | -1.01 | -0.05 | -4.59 | 1.09 |
| 1966 | -1.61 | -1.05 | 0.65 | -3.22 | -4.07 | 1.36 | 1.50 | 0.62 | -2.61 | -1.45 | 1.81 | -0.71 |
| 1965 | -3.21 | -1.45 | -3.25 | -3.42 | 3.53 | -1.64 | -2.10 | -1.08 | 1.59 | -2.35 | -1.19 | 2.09 |
| 1964 | 1.79 | -3.75 | 0.55 | -1.92 | 1.83 | -1.04 | 1.40 | -3.18 | 0.79 | -2.55 | 2.11 | -0.21 |
| 1963 | -3.41 | -9.05 | 0.15 | -0.02 | -2.17 | -0.14 | 0.00 | -3.08 | -3.31 | 4.95 | 4.11 | -6.41 |
| 1962 | -0.51 | -2.55 | -0.85 | 0.48 | 2.53 | 1.76 | -2.40 | -1.08 | -3.51 | 0.75 | -3.69 | -5.91 |
| 1961 | -5.81 | 1.25 | -0.85 | -4.02 | -2.67 | 1.76 | 0.70 | 1.02 | 7.49 | 3.85 | 0.81 | -1.11 |
| 1960 | 3.39 | 2.35 | -11.55 | 4.48 | -1.07 | 0.26 | -2.20 | 1.02 | 1.79 | 0.45 | 1.71 | -7.81 |
| 1959 | -0.61 | -1.95 | -1.55 | 2.28 | 3.13 | 1.36 | 1.20 | 3.12 | 4.99 | 3.75 | -1.59 | 2.19 |
| 1958 | -0.11 | -7.65 | -2.35 | 0.88 | -2.87 | -4.54 | 0.80 | -0.48 | -0.41 | -0.95 | 0.71 | -8.61 |
| 1957 | -4.01 | 3.35 | -0.45 | 1.88 | -0.57 | 3.26 | -0.80 | -3.08 | 1.29 | -1.75 | 1.01 | 3.59 |
| 1956 | 0.39 | 1.45 | -5.35 | -3.72 | -4.37 | 0.86 | -3.60 | -2.08 | -3.51 | 1.05 | -0.39 | 3.89 |
| 1955 | -1.81 | -0.25 | -0.25 | 3.58 | 2.13 | -1.54 | 5.30 | 3.72 | -0.81 | 3.15 | -2.79 | -6.41 |
| 1954 | -1.41 | 6.15 | -0.85 | 2.68 | -2.97 | 1.46 | -1.00 | -2.08 | 0.39 | 3.85 | -1.59 | -1.81 |
| 1953 | 5.99 | 4.25 | 1.15 | -1.02 | 2.13 | 1.46 | 1.10 | 0.02 | 1.19 | 3.35 | 1.81 | 4.59 |
| 1952 | 3.99 | 2.15 | -2.05 | 2.38 | -2.57 | 2.46 | 3.00 | -0.38 | 1.19 | -2.95 | 1.11 | 1.69 |
| 1951 | 4.89 | 2.85 | -0.05 | 0.98 | 1.43 | 0.36 | 0.80 | 0.22 | 0.49 | 3.15 | -4.89 | 0.29 |
| 1950 | 10.59 | -0.95 | -5.65 | -3.62 | -0.17 | -0.24 | -1.20 | 0.22 | -1.81 | 4.15 | 1.41 | -3.11 |
| 1949 | 8.89 | 6.25 | 2.85 | 2.28 | 1.03 | 4.96 | 5.10 | 3.22 | -1.41 | 6.35 | -0.79 | 1.49 |
| 1948 | -5.41 | -1.75 | 1.85 | 2.28 | -0.17 | 0.36 | 1.30 | 1.22 | 2.39 | -0.05 | 6.11 | 1.39 |
| 1947 | 7.29 | -3.25 | -3.65 | -0.02 | -0.07 | -0.54 | -0.50 | 3.72 | 1.69 | 8.25 | -2.39 | -0.81 |
| 1946 | 3.69 | -0.25 | 10.45 | 0.78 | 0.43 | -0.44 | 0.70 | -3.08 | 2.59 | 5.85 | 4.61 | 2.69 |
| 1945 | -5.71 | 0.65 | 11.05 | 5.18 | -2.77 | -0.24 | -0.20 | -0.48 | 3.59 | -0.05 | 1.41 | -4.01 |
| 1944 | 4.79 | 0.55 | -3.15 | -2.52 | 6.53 | 2.36 | 2.00 | 2.62 | 1.69 | -0.35 | -0.09 | -3.11 |
| 1943 | 0.89 | 0.45 | -0.65 | -5.52 | 2.13 | 6.26 | 1.90 | 1.32 | -0.41 | -0.05 | -1.89 | -2.81 |
| 1942 | -0.61 | -3.85 | 2.15 | 4.18 | 3.33 | 1.36 | 0.70 | -1.68 | -0.41 | 1.35 | -0.49 | -4.61 |
| 1941 | -0.91 | -3.45 | -7.35 | 5.88 | 0.73 | 0.56 | 1.30 | -2.78 | 1.79 | 4.35 | 2.51 | 2.79 |
| 1940 | -6.51 | -1.35 | -7.25 | -4.82 | -0.47 | -1.74 | -0.40 | -2.58 | -1.41 | -3.15 | -1.49 | 2.29 |
| 1939 | 1.29 | 3.15 | -1.35 | -2.32 | 3.53 | 0.96 | 0.90 | 3.62 | 2.39 | 0.95 | -3.29 | 1.89 |
| 1938 | -0.11 | 1.25 | 2.25 | 1.78 | -2.37 | -0.24 | 0.80 | 2.52 | -2.31 | 4.05 | 1.21 | 0.19 |
| 1937 | 8.39 | 0.85 | -6.35 | -2.22 | 1.13 | 1.46 | 0.10 | 2.92 | -2.21 | -2.15 | -1.89 | -2.41 |
| 1936 | -5.01 | -8.25 | 4.35 | -3.02 | 1.73 | -0.34 | 0.40 | 1.02 | 1.49 | 0.65 | -4.99 | 2.09 |
| 1935 | -1.91 | -2.25 | 1.75 | -3.02 | -4.87 | -0.64 | 1.60 | -0.58 | -2.71 | -0.05 | 1.01 | -6.71 |
| 1934 | 3.49 | -14.15 | -4.35 | -1.42 | 1.43 | 3.26 | 0.90 | -4.08 | 1.99 | -2.15 | 1.71 | -2.31 |
| 1933 | 8.69 | -0.25 | -3.35 | 0.18 | 1.63 | 1.86 | -0.70 | -1.08 | 0.89 | -1.25 | -6.19 | -2.31 |
| 1932 | 11.69 | 2.75 | -6.05 | -4.62 | -0.67 | -1.64 | -2.80 | -0.68 | -0.11 | 0.75 | -4.39 | 0.79 |
| 1931 | 0.99 | -0.25 | -2.15 | -1.22 | -0.37 | 0.36 | 2.10 | -0.18 | 4.79 | 3.25 | 6.41 | 4.29 |
| 1930 | 1.79 | 2.75 | -0.85 | -3.02 | 1.43 | 1.86 | -0.80 | -1.38 | 2.59 | -1.75 | -0.69 | -1.41 |
| 1929 | 0.29 | -0.95 | 4.75 | 0.58 | -0.97 | 0.76 | -1.10 | -2.88 | 0.69 | -2.05 | -0.99 | -0.41 |
| 1928 | 2.59 | -0.25 | -2.45 | -3.72 | -2.17 | -3.04 | 0.30 | 2.32 | -4.01 | 2.25 | 0.41 | 2.89 |
| 1927 | -0.71 | 3.85 | 2.55 | -2.82 | -2.47 | -3.64 | -1.30 | -5.18 | -0.31 | 2.95 | 3.01 | 0.99 |
| 1926 | 0.69 | -3.05 | -6.25 | -4.92 | -1.67 | -5.04 | -1.20 | 0.02 | -2.51 | -1.25 | -2.79 | -5.91 |
| 1925 | -3.51 | 5.05 | 2.95 | 0.78 | -4.07 | 3.66 | -2.70 | -1.48 | 0.59 | -6.45 | -3.29 | -0.41 |
| 1924 | 1.79 | -4.55 | -2.15 | -3.22 | -4.57 | -2.24 | -2.30 | -0.98 | -4.51 | 0.45 | -1.99 | -2.01 |
| 1923 | -0.71 | -6.25 | -3.15 | -1.22 | -1.87 | 2.66 | -2.20 | -1.98 | 0.29 | -0.75 | -1.99 | 6.99 |
| 1922 | -2.81 | 1.85 | 0.55 | 0.18 | 2.53 | 1.86 | -0.80 | -1.78 | 0.99 | 2.15 | -0.09 | -1.41 |
| 1921 | 2.69 | 1.85 | 9.45 | 6.28 | -0.37 | 1.46 | 3.50 | -2.58 | 3.59 | -0.05 | -1.29 | -1.41 |
| 1920 | -7.11 | -4.85 | -1.05 | -3.42 | -3.37 | -0.94 | -2.90 | 0.42 | 0.29 | 5.25 | -2.69 | 1.59 |
| 1919 | 4.19 | 1.45 | 2.65 | -1.92 | 0.03 | 2.46 | -0.10 | -2.78 | -0.11 | 4.55 | -1.59 | -6.61 |
| 1918 | -9.81 | -3.15 | 1.35 | -1.22 | 4.93 | -3.44 | -1.70 | 1.52 | -5.01 | 3.05 | -0.59 | 3.29 |
| 1917 | 0.99 | -4.45 | -2.45 | -1.72 | -6.87 | -1.04 | 0.90 | 1.22 | -5.21 | -4.15 | -5.69 | -10.21 |
| 1916 | 5.69 | -4.75 | -10.45 | -1.92 | 0.43 | -4.94 | 1.30 | 0.82 | -1.11 | 0.65 | -1.89 | -1.71 |
| 1915 | 2.19 | 2.25 | -5.35 | 3.88 | -4.37 | -2.14 | -1.90 | -1.98 | 1.69 | 1.65 | -1.49 | -2.71 |
| 1914 | 0.79 | -8.15 | -5.45 | -3.42 | 2.13 | -1.34 | -2.70 | -0.28 | -2.81 | 3.75 | -3.29 | -4.11 |
| 1913 | 8.79 | -2.35 | 4.45 | 1.38 | -1.57 | -0.44 | -0.70 | -1.08 | -2.51 | 3.35 | 1.01 | 2.69 |
| 1912 | -8.41 | -5.55 | -5.15 | -0.32 | 1.33 | -2.44 | -0.60 | -3.88 | -1.01 | 2.15 | 0.21 | 2.69 |
| 1911 | 2.89 | -1.65 | -4.15 | -3.72 | 5.63 | -0.64 | 1.50 | -0.08 | -1.21 | -0.55 | -5.19 | 4.19 |
| 1910 | -0.21 | -2.85 | 4.95 | 3.08 | -2.17 | -2.54 | 0.90 | -2.18 | -0.21 | 2.95 | -6.29 | -8.11 |
| 1909 | 2.89 | 5.15 | -3.65 | -1.42 | -0.77 | 0.86 | -2.80 | -2.48 | -2.11 | -3.45 | 2.31 | -4.21 |
| 1908 | 1.09 | -6.25 | 0.55 | -0.52 | 0.63 | 0.86 | 1.50 | -1.98 | 0.59 | 2.75 | -1.79 | -0.71 |
| 1907 | 1.09 | -8.65 | 0.85 | -5.52 | -5.37 | -3.54 | -0.60 | -2.58 | -0.01 | -3.75 | -3.59 | 1.29 |
| 1906 | 6.89 | -1.65 | -7.25 | 0.08 | -0.27 | 1.46 | -0.70 | 2.32 | 1.69 | 0.35 | -2.09 | -2.31 |
| 1905 | -3.21 | -8.95 | -1.55 | -0.72 | 0.73 | -0.64 | 0.80 | -2.48 | -0.91 | 0.95 | -3.99 | 1.89 |
| 1904 | -7.51 | -8.35 | -4.35 | -4.32 | 2.83 | 0.06 | -1.60 | -1.98 | -2.31 | -1.95 | -5.19 | -7.31 |
| 1903 | -0.01 | 1.05 | 8.05 | -0.32 | 1.63 | -5.04 | -1.60 | -5.48 | -1.21 | 1.55 | -5.99 | -5.61 |
| 1902 | -1.91 | -5.05 | 3.55 | -0.52 | -1.17 | -2.94 | -1.50 | -2.88 | -2.11 | 1.65 | 4.21 | -3.91 |
| 1901 | 1.09 | -7.65 | -2.25 | -1.82 | -1.17 | 1.26 | 3.10 | 1.02 | -0.21 | 0.45 | -7.79 | -2.21 |
| 1900 | 2.59 | -2.05 | -7.75 | -0.32 | -0.47 | 1.76 | 1.50 | 3.72 | 3.09 | 6.75 | 0.61 | -0.41 |
| 1899 | -0.91 | -6.15 | -2.85 | 0.28 | 0.63 | 3.36 | 0.30 | 0.32 | -2.51 | 2.85 | -1.39 | 0.59 |