Time series of number of days maximum apparent temperature exceeded the 1961 - 90 85th percentile threshold at: DULUTH MN Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1948 0 0 0 0 0 2 5 6 6 0 0 0 1949 0 0 0 0 0 5 10 11 0 0 0 0 1950 0 0 0 0 0 0 3 2 0 0 0 0 1951 0 0 0 0 0 0 7 0 0 0 0 0 1952 0 0 0 2 0 3 8 1 1 0 0 0 1953 0 0 0 0 0 1 6 7 1 1 0 0 1954 0 0 0 0 0 2 6 2 0 0 0 0 1955 0 0 0 0 0 2 15 9 0 0 0 0 1956 0 0 0 0 0 6 1 2 0 0 0 0 1957 0 0 0 0 0 0 7 5 0 0 0 0 1958 0 0 0 0 0 2 4 6 1 0 0 0 1959 0 0 0 0 0 5 11 8 0 0 0 0 1960 0 0 0 0 0 1 6 3 2 0 0 0 1961 0 0 0 0 1 4 3 7 3 0 0 0 1962 0 0 0 0 1 1 0 1 0 0 0 0 1963 0 0 0 0 0 4 7 4 0 0 0 0 1964 0 0 0 0 2 4 8 2 0 0 0 0 1965 0 0 0 0 0 0 2 3 0 0 0 0 1966 0 0 0 0 0 5 11 3 0 0 0 0 1967 0 0 0 0 0 0 3 3 0 0 0 0 1968 0 0 0 0 0 1 3 3 0 0 0 0 1969 0 0 0 0 2 0 5 10 0 0 0 0 1970 0 0 0 0 0 3 13 5 1 0 0 0 1971 0 0 0 0 0 1 0 4 2 0 0 0 1972 0 0 0 0 1 2 1 2 0 0 0 0 1973 0 0 0 0 0 0 2 5 1 0 0 0 1974 0 0 0 0 0 0 9 1 0 0 0 0 1975 0 0 0 0 0 2 11 2 0 0 0 0 1976 0 0 0 0 0 3 4 7 2 0 0 0 1977 0 0 0 0 1 1 6 0 0 0 0 0 1978 0 0 0 0 1 2 3 4 3 0 0 0 1979 0 0 0 0 0 1 4 0 1 0 0 0 1980 0 0 0 0 0 2 7 0 0 0 0 0 1981 0 0 0 0 0 0 6 0 0 0 0 0 1982 0 0 0 0 0 0 1 0 0 0 0 0 1983 0 0 0 0 0 3 11 9 1 0 0 0 1984 0 0 0 0 0 0 5 7 1 0 0 0 1985 0 0 0 0 0 0 2 1 1 0 0 0 1986 0 0 0 0 2 2 5 2 0 0 0 0 1987 0 0 0 0 0 5 6 4 0 0 0 0 1988 0 0 0 0 3 12 14 8 0 0 0 0 1989 0 0 0 0 0 0 14 6 0 0 0 0 1990 0 0 0 0 0 4 3 5 1 0 0 0 1991 0 0 0 0 0 2 4 8 0 0 0 0 1992 0 0 0 0 0 0 0 2 0 0 0 0 1993 0 0 0 0 0 1 0 4 0 0 0 0 1994 0 0 0 0 0 1 1 2 0 0 0 0 1995 0 0 0 0 0 8 7 4 1 0 0 0 1996 0 0 0 0 0 4 1 1 0 0 0 0 1997 0 0 0 0 0 1 3 2 0 0 0 0 1998 0 0 0 0 1 0 5 2 3 0 0 0 1999 0 0 0 0 1 2 10 2 0 0 0 0 2000 0 0 0 0 0 1 4 1 0 0 0 0 2001 0 0 0 0 0 4 7 8 0 0 0 0 2002 0 0 0 0 1 5 13 1 2 0 0 0 2003 0 0 0 0 -9 -9 -9 -9 -9 -9 -9 -9