| Division 4 Mean Temperature and Departures from Normal | ||||||||||||
| Year | January | February | March | April | May | June | July | August | September | October | November | December |
| MEAN (1971-2000) | 28.95 | 31.84 | 40.51 | 50.85 | 60.75 | 69.46 | 74.07 | 72.27 | 64.83 | 53.21 | 43.25 | 33.60 |
| DEPARTURES | ||||||||||||
| 2004 | -4.95 | -1.54 | 2.79 | 1.35 | 6.85 | -1.06 | -1.07 | -0.17 | 2.17 | -0.30* | 3.43* | 0.07* |
| 2003 | -3.55 | -4.34 | -0.01 | -0.45 | -1.75 | -1.86 | -0.07 | 2.53 | 0.57 | -1.41 | 5.05 | -0.60 |
| 2002 | 7.90 | 6.10 | 1.90 | 3.50 | -1.00 | 2.00 | 2.20 | 3.40 | 2.90 | -0.20 | -0.40 | -2.60 |
| 2001 | 0.00 | 3.80 | -2.60 | 1.80 | 1.20 | 1.30 | -2.70 | 3.30 | 0.00 | 1.90 | 5.90 | 6.20 |
| 2000 | 0.00 | 2.80 | 5.60 | -0.30 | 2.30 | 0.60 | -4.40 | -1.30 | -1.30 | 2.40 | -1.30 | -7.40 |
| 1999 | 2.10 | 3.40 | -1.10 | 0.90 | 0.90 | 0.50 | 3.90 | 0.50 | 0.50 | -1.40 | 5.10 | 2.10 |
| 1998 | 8.80 | 7.00 | 2.30 | 2.70 | 4.20 | -0.30 | -0.70 | 0.80 | 4.50 | 2.40 | 2.20 | 6.70 |
| 1997 | 0.20 | 4.70 | 1.20 | -2.00 | -3.70 | -1.20 | -0.80 | -1.10 | -0.40 | 1.10 | -2.50 | 1.90 |
| 1996 | -2.80 | -1.20 | -4.90 | 0.70 | -2.10 | 1.90 | -2.10 | -1.10 | 0.30 | 0.30 | -5.20 | 2.40 |
| 1995 | 4.40 | -3.50 | 2.90 | -1.30 | -0.60 | 0.30 | 1.40 | 2.70 | -0.40 | 3.70 | -5.40 | -4.80 |
| 1994 | -7.90 | -3.40 | -2.60 | 5.00 | -3.00 | 3.80 | 1.70 | -2.40 | -0.90 | -0.80 | 3.90 | 4.30 |
| 1993 | 4.30 | -4.20 | -5.30 | -1.00 | 1.60 | -0.40 | 1.70 | 1.40 | -0.20 | -1.50 | 0.20 | -1.20 |
| 1992 | 2.50 | 2.80 | -2.50 | -0.90 | -3.10 | -3.30 | -1.40 | -3.90 | -1.50 | -3.10 | -0.90 | -0.60 |
| 1991 | 1.50 | 4.70 | 2.60 | 1.90 | 7.00 | 2.80 | 2.80 | 2.60 | -0.70 | 1.00 | -0.80 | 2.20 |
| 1990 | 9.10 | 6.50 | 4.00 | 1.50 | -1.50 | 1.10 | -0.20 | -1.00 | -0.90 | 4.10 | 3.10 | 3.50 |
| 1989 | 4.90 | 0.30 | -1.50 | -2.30 | -2.20 | 1.00 | -1.20 | -1.20 | -0.50 | 0.90 | -1.40 | -12.20 |
| 1988 | -4.70 | -0.70 | 1.10 | -1.40 | 0.50 | 0.40 | 3.50 | 3.10 | -2.70 | -4.80 | 0.20 | -1.30 |
| 1987 | -0.60 | -0.90 | 1.80 | -0.40 | 1.50 | 2.50 | 3.00 | 0.30 | 0.10 | -5.00 | 0.70 | 2.40 |
| 1986 | 1.20 | -2.20 | 1.20 | 1.20 | 3.00 | 1.20 | 1.60 | -1.80 | 0.30 | 1.70 | -2.90 | 1.30 |
| 1985 | -2.90 | 0.70 | 2.40 | 4.00 | 2.20 | -1.70 | -0.30 | -0.50 | 1.70 | 2.00 | 4.60 | -3.60 |
| 1984 | -4.40 | 4.90 | -6.50 | -2.10 | -2.20 | 0.90 | -2.20 | 0.30 | -2.60 | 5.50 | -2.30 | 6.30 |
| 1983 | 1.90 | 0.10 | 1.20 | -2.30 | -2.60 | -0.10 | 1.20 | 2.60 | 0.70 | 0.20 | 0.40 | -4.70 |
| 1982 | -8.00 | -1.00 | -1.90 | -2.80 | 2.80 | -3.10 | -0.20 | -3.40 | -0.90 | 0.10 | 2.20 | 5.60 |
| 1981 | -4.30 | 3.70 | -2.20 | 2.70 | -0.80 | 0.70 | -0.50 | -1.90 | -1.50 | -3.60 | -0.60 | -3.10 |
| 1980 | 0.10 | -3.80 | -3.10 | 1.00 | 2.00 | -2.10 | 1.20 | 2.60 | 3.10 | -2.00 | -3.30 | -2.80 |
| 1979 | -1.70 | -10.70 | 2.60 | -1.50 | -0.10 | -2.50 | -2.20 | -0.90 | -0.80 | -1.40 | 3.30 | 2.30 |
| 1978 | -4.60 | -10.00 | -4.30 | -1.00 | -1.70 | -0.80 | -3.10 | 2.30 | 1.50 | -1.90 | 0.70 | 1.20 |
| 1977 | -10.90 | -0.80 | 5.10 | 2.90 | 3.40 | -1.90 | 1.10 | 0.80 | 2.30 | -1.70 | 1.70 | -3.70 |
| 1976 | -3.40 | 6.70 | 3.20 | 2.80 | -2.60 | 2.00 | -3.30 | -2.30 | -1.70 | -4.40 | -5.40 | -6.30 |
| 1975 | 4.10 | 0.60 | -2.80 | -4.90 | 2.90 | -0.30 | -0.80 | 1.50 | -3.50 | 3.60 | 5.40 | -0.90 |
| 1974 | 5.50 | -0.70 | 1.30 | 2.40 | -0.60 | -2.50 | -0.10 | 0.80 | -1.50 | -2.60 | 0.90 | 1.70 |
| 1973 | 4.20 | -0.80 | 5.40 | -0.20 | -3.50 | 2.40 | 0.30 | 1.80 | 2.20 | 3.10 | 2.50 | 1.10 |
| 1972 | 3.70 | -3.60 | -1.90 | -2.30 | 0.00 | -4.30 | -0.10 | -0.90 | 2.00 | -3.40 | -3.00 | 3.10 |
| 1971 | -3.70 | -0.10 | -2.90 | -1.60 | -2.70 | 1.10 | -0.60 | -1.40 | 3.60 | 5.80 | -0.70 | 5.40 |
| 1970 | -6.30 | -1.20 | -4.40 | 0.00 | 3.50 | -0.30 | -0.40 | 0.60 | 4.10 | 3.60 | 0.90 | 0.30 |
| 1969 | -0.90 | -0.20 | -2.60 | 2.50 | 1.60 | 2.00 | 0.00 | -0.20 | 0.60 | -0.40 | -1.70 | -3.60 |
| 1968 | -4.70 | -2.80 | 2.90 | 2.30 | -3.80 | -0.40 | 1.40 | 3.00 | 1.90 | 2.40 | 0.40 | -3.30 |
| 1967 | 5.80 | -4.80 | -1.80 | 1.40 | -6.50 | 1.90 | -1.30 | -1.90 | -1.80 | -1.00 | -4.00 | 0.70 |
| 1966 | -1.90 | -1.10 | 1.80 | -4.10 | -1.70 | 2.20 | 3.60 | 2.70 | -1.00 | -1.30 | 0.50 | -1.40 |
| 1965 | -1.60 | -0.60 | -3.60 | -2.30 | 4.40 | -0.40 | -0.50 | 0.10 | 3.10 | -1.30 | 0.00 | 3.10 |
| 1964 | 1.00 | -2.80 | 0.70 | -1.90 | 2.30 | 0.80 | 1.00 | -2.40 | 0.20 | -2.40 | 2.90 | 0.10 |
| 1963 | -3.40 | -8.60 | 1.50 | 1.40 | -1.20 | 0.00 | -0.40 | -2.40 | -2.50 | 4.80 | 3.10 | -7.00 |
| 1962 | -0.20 | -3.30 | -1.80 | 0.90 | 3.80 | 1.00 | -2.10 | -0.30 | -3.40 | 1.70 | -3.00 | -5.60 |
| 1961 | -4.90 | 0.80 | 0.90 | -4.00 | -3.00 | -0.30 | 0.20 | 0.70 | 6.10 | 3.00 | 2.20 | -2.40 |
| 1960 | 4.00 | 1.50 | -10.00 | 4.90 | -1.70 | -0.40 | -2.50 | 1.70 | 1.40 | 0.40 | 1.30 | -8.70 |
| 1959 | -0.20 | 1.00 | -1.20 | 3.10 | 4.00 | 1.50 | 1.30 | 2.90 | 3.70 | 3.90 | -2.00 | 1.80 |
| 1958 | 0.80 | -5.30 | -2.80 | 1.50 | -1.00 | -3.00 | 1.40 | -0.50 | 0.30 | 0.10 | 2.00 | -6.90 |
| 1957 | -1.30 | 3.90 | -0.10 | 2.90 | 1.80 | 3.50 | -0.30 | -0.80 | 2.40 | -1.60 | 0.80 | 2.80 |
| 1956 | 1.80 | 3.30 | -2.50 | -1.90 | -1.50 | 1.10 | -1.80 | -0.40 | -2.20 | 1.30 | -0.10 | 6.50 |
| 1955 | 0.90 | -0.60 | 1.70 | 4.00 | 3.20 | -2.40 | 5.00 | 4.20 | 0.30 | 2.70 | -3.00 | -5.20 |
| 1954 | 0.10 | 6.40 | -0.50 | 4.00 | -2.20 | 1.60 | 0.50 | -0.80 | 2.20 | 4.10 | -2.30 | -1.00 |
| 1953 | 6.10 | 5.40 | 1.80 | -0.50 | 4.00 | 1.30 | 1.00 | 0.20 | 0.90 | 2.90 | 0.00 | 2.80 |
| 1952 | 5.10 | 3.70 | -1.80 | 1.60 | -1.00 | 3.00 | 2.70 | 0.50 | 0.40 | -2.80 | 0.40 | 1.20 |
| 1951 | 3.30 | 0.40 | -0.10 | -0.30 | 0.40 | 0.00 | 0.10 | -0.40 | 0.80 | 2.90 | -5.10 | -0.70 |
| 1950 | 10.10 | 0.00 | -5.30 | -4.30 | -0.80 | -0.70 | -2.50 | -1.40 | -3.40 | 2.50 | -0.60 | -5.00 |
| 1949 | 6.80 | 4.70 | 0.80 | -1.50 | 0.40 | 1.90 | 3.20 | 0.80 | -2.90 | 5.10 | -1.40 | 0.60 |
| 1948 | -6.50 | -2.60 | 1.60 | -0.10 | -0.70 | -0.60 | -0.50 | -1.00 | -0.30 | -2.10 | 3.10 | -0.20 |
| 1947 | 6.20 | -5.10 | -5.80 | 0.30 | -1.20 | -1.30 | -2.00 | 2.60 | 1.50 | 6.70 | -2.90 | -2.00 |
| 1946 | 2.70 | 0.20 | 7.90 | -0.70 | 0.40 | -1.80 | -0.60 | -4.90 | 0.20 | 3.30 | 2.00 | 1.40 |
| 1945 | -5.30 | -0.70 | 10.40 | 2.80 | -2.30 | 0.30 | -0.50 | -1.10 | 3.10 | -0.30 | 0.50 | -5.60 |
| 1944 | 3.10 | 0.60 | -3.60 | -3.00 | 6.80 | 1.60 | 1.40 | 1.90 | 1.10 | -0.50 | -0.30 | -4.80 |
| 1943 | 1.30 | 0.90 | -0.40 | -4.90 | 2.60 | 6.30 | 0.90 | 2.00 | -0.80 | -0.50 | -2.20 | -1.80 |
| 1942 | 0.40 | -2.40 | 2.00 | 4.10 | 4.70 | 1.50 | 0.70 | -1.00 | 1.00 | 2.30 | 0.50 | -4.00 |
| 1941 | 0.40 | -3.10 | -5.50 | 5.50 | 3.20 | 0.60 | 1.10 | -0.70 | 3.70 | 6.30 | 2.30 | 3.10 |
| 1940 | -8.40 | 0.10 | -5.70 | -4.20 | 0.80 | 0.30 | 1.00 | -2.40 | -1.70 | -2.10 | -0.10 | 3.60 |
| 1939 | 2.00 | 4.10 | 0.40 | -2.70 | 3.90 | 2.50 | -0.30 | 3.50 | 2.40 | 1.40 | -1.40 | 1.80 |
| 1938 | 1.90 | 3.50 | 3.20 | 1.60 | 0.00 | 0.40 | 1.40 | 3.90 | -0.90 | 2.30 | 0.50 | -0.60 |
| 1937 | 8.10 | 0.80 | -3.30 | -1.80 | 1.60 | 2.70 | 0.30 | 2.30 | -2.00 | -1.40 | -0.90 | -1.70 |
| 1936 | -4.70 | -9.40 | 3.70 | -3.10 | 4.10 | 0.80 | 1.70 | 2.60 | 2.80 | 2.30 | -3.50 | 1.00 |
| 1935 | -1.40 | -2.00 | 3.90 | -2.20 | -2.50 | 0.10 | 3.00 | 1.20 | -1.80 | 1.30 | 2.60 | -5.70 |
| 1934 | 5.10 | -10.20 | -4.10 | -0.30 | 2.40 | 4.60 | 4.00 | -1.90 | 2.20 | -0.40 | 2.30 | -1.20 |
| 1933 | 9.30 | 0.50 | -2.30 | 0.80 | 3.00 | 3.30 | 0.30 | 0.50 | 3.20 | -0.40 | -3.90 | -1.30 |
| 1932 | 12.60 | 5.50 | -4.80 | -2.20 | 0.90 | 1.10 | 0.80 | 2.00 | 1.90 | 0.80 | -3.50 | -0.10 |
| 1931 | 3.30 | 2.40 | -2.50 | -0.90 | 1.40 | 1.00 | 3.80 | 1.10 | 6.70 | 4.40 | 6.40 | 5.50 |
| 1930 | 0.80 | 5.10 | -0.40 | -1.90 | 2.50 | 1.60 | 1.70 | 0.60 | 5.40 | -1.30 | -1.20 | -3.20 |
| 1929 | -0.20 | -1.80 | 4.70 | 2.20 | -0.10 | 0.50 | 0.10 | -2.60 | 1.90 | -1.70 | -0.40 | -0.10 |
| 1928 | 2.70 | 0.40 | -1.20 | -2.90 | -1.10 | -1.60 | 1.00 | 2.50 | -3.20 | 2.80 | 1.40 | 1.50 |
| 1927 | -0.30 | 4.30 | 3.40 | -2.50 | -0.60 | -3.50 | 0.30 | -5.60 | 1.20 | 3.40 | 3.80 | 0.20 |
| 1926 | 0.20 | -1.20 | -4.50 | -3.10 | 0.20 | -3.40 | 0.30 | 1.40 | 0.40 | -0.10 | -2.30 | -5.30 |
| 1925 | -2.90 | 5.00 | 1.80 | 2.00 | -3.30 | 5.10 | -1.00 | -1.50 | 4.50 | -5.30 | -3.00 | -1.40 |
| 1924 | 1.10 | -2.00 | -2.10 | -3.10 | -3.70 | -1.60 | -1.80 | -0.30 | -3.70 | 0.80 | -1.90 | -2.10 |
| 1923 | 1.70 | -4.80 | -0.30 | -0.60 | -0.10 | 4.50 | 0.10 | -1.10 | 1.50 | -0.70 | -2.00 | 6.90 |
| 1922 | -2.70 | 2.50 | 1.00 | 0.70 | 3.30 | 2.50 | 0.50 | -1.30 | 2.60 | 3.20 | 0.50 | -1.10 |
| 1921 | 2.80 | 2.60 | 9.30 | 5.80 | 0.00 | 2.80 | 3.10 | -2.40 | 5.60 | 0.40 | 0.30 | -1.10 |
| 1920 | -6.00 | -4.20 | 0.10 | -2.70 | -3.00 | -0.20 | -1.90 | -0.40 | 0.80 | 5.20 | -1.60 | 0.40 |
| 1919 | 4.30 | 1.60 | 2.90 | -0.60 | 1.10 | 2.00 | 0.70 | -2.00 | 1.10 | 6.00 | -0.80 | -7.70 |
| 1918 | -11.30 | -1.90 | 3.10 | -1.30 | 6.10 | -1.50 | -2.20 | 2.70 | -4.20 | 3.80 | -0.50 | 3.60 |
| 1917 | 0.60 | -3.80 | -1.50 | -0.30 | -5.00 | 0.20 | 0.10 | 0.10 | -5.10 | -4.50 | -4.40 | -10.30 |
| 1916 | 5.80 | -3.90 | -7.70 | -1.40 | 2.70 | -3.80 | 1.60 | 1.00 | -1.20 | 0.20 | -1.00 | -2.70 |
| 1915 | 0.40 | 2.40 | -5.60 | 4.50 | -2.00 | -1.90 | -0.90 | -1.80 | 2.90 | 2.20 | -1.40 | -3.80 |
| 1914 | 2.70 | -8.00 | -4.30 | -1.60 | 3.00 | 1.20 | -0.60 | 1.50 | -2.20 | 4.50 | -1.90 | -5.50 |
| 1913 | 8.10 | -2.20 | 3.80 | 1.40 | 0.10 | 1.20 | 0.40 | -0.60 | -0.60 | 3.00 | 1.20 | 1.80 |
| 1912 | -9.10 | -5.90 | -4.40 | 1.30 | 2.10 | -0.90 | -0.60 | -2.60 | 2.10 | 2.40 | 0.80 | 1.40 |
| 1911 | 3.70 | 0.60 | -3.70 | -3.40 | 5.70 | 1.00 | 2.60 | 1.00 | 2.10 | 0.40 | -4.10 | 3.10 |
| 1910 | -1.20 | -3.30 | 5.80 | 3.60 | -1.60 | -1.90 | 1.60 | -0.80 | 2.70 | 3.80 | -5.40 | -8.40 |
| 1909 | 1.90 | 6.10 | -3.10 | -0.40 | 0.80 | 1.70 | -1.50 | -1.50 | -0.70 | -3.60 | 3.40 | -5.40 |
| 1908 | 1.10 | -5.50 | 1.60 | 1.10 | 2.00 | 1.40 | 2.40 | -1.70 | 0.70 | 2.60 | -1.40 | -0.80 |
| 1907 | 1.30 | -8.00 | 2.50 | -5.30 | -3.70 | -4.80 | 0.00 | -2.50 | 1.70 | -3.70 | -2.70 | -0.60 |
| 1906 | 6.70 | -2.30 | -6.60 | 0.90 | 1.40 | 1.90 | -0.70 | 2.00 | 3.50 | 0.00 | -0.30 | -1.60 |
| 1905 | -2.50 | -9.50 | 1.00 | -0.60 | 2.90 | 0.60 | 1.20 | -0.50 | 0.40 | 1.40 | -3.00 | 0.50 |
| 1904 | -8.70 | -8.70 | -2.80 | -4.10 | 2.70 | 0.30 | -0.80 | -2.70 | 0.30 | -1.40 | -3.50 | -6.90 |
| 1903 | -1.60 | -0.30 | 6.70 | -0.30 | 2.60 | -4.00 | 0.70 | -3.40 | -0.60 | 1.70 | -5.00 | -6.00 |
| 1902 | -2.60 | -6.80 | 2.20 | -1.30 | 1.40 | -0.50 | 0.60 | -2.80 | -1.10 | 1.80 | 4.50 | -4.40 |
| 1901 | 1.10 | -8.20 | -0.80 | -2.60 | -0.20 | 1.20 | 4.60 | 1.40 | 0.10 | 0.10 | -6.60 | -4.00 |
| 1900 | 1.60 | -3.10 | -7.10 | -0.20 | 1.60 | 2.40 | 2.90 | 5.70 | 5.20 | 6.20 | 1.70 | -1.00 |
| 1899 | -1.90 | -8.40 | -2.40 | 0.10 | 1.90 | 2.90 | 0.60 | 0.30 | -1.60 | 2.30 | -1.60 | -1.30 |