year month temperature 1956 1 19.4 1956 2 21.2 1956 3 22.6 1956 4 21.5 1956 5 19.6 1956 6 18.0 1956 7 17.8 1956 8 17.0 1956 9 17.2 1956 10 16.8 1956 11 17.0 1956 12 17.6 1957 1 18.5 1957 2 19.0 1957 3 18.4 1957 4 17.1 1957 5 16.3 1957 6 15.4 1957 7 15.9 1957 8 14.6 1957 9 15.0 1957 10 15.1 1957 11 15.8 1957 12 18.2 1958 1 20.8 1958 2 19.6 1958 3 17.8 1958 4 18.4 1958 5 17.0 1958 6 16.8 1958 7 16.6 1958 8 15.9 1958 9 16.3 1958 10 15.7 1958 11 16.1 1958 12 16.8 1959 1 18.4 1959 2 19.8 1959 3 20.2 1959 4 18.8 1959 5 18.2 1959 6 17.8 1959 7 17.6 1959 8 17.0 1959 9 16.6 1959 10 16.2 1959 11 16.4 1959 12 16.2 1960 1 17.8 1960 2 22.3 1960 3 22.1 1960 4 21.8 1960 5 22.2 1960 6 21.2 1960 7 20.3 1960 8 18.7 1960 9 17.7 1960 10 17.9 1960 11 17.9 1960 12 20.6 1961 1 21.8 1961 2 22.2 1961 3 22.0 1961 4 20.1 1961 5 18.8 1961 6 18.2 1961 7 18.0 1961 8 17.0 1961 9 17.0 1961 10 17.1 1961 11 17.5 1961 12 17.0 1962 1 19.0 1962 2 21.2 1962 3 20.6 1962 4 19.6 1962 5 18.7 1962 6 17.8 1962 7 16.9 1962 8 16.6 1962 9 16.8 1962 10 17.2 1962 11 17.6 1962 12 18.6 1963 1 19.0 1963 2 19.5 1963 3 19.2 1963 4 18.0 1963 5 17.2 1963 6 17.1 1963 7 16.6 1963 8 16.8 1963 9 16.7 1963 10 16.6 1963 11 16.6 1963 12 17.6 1964 1 19.0 1964 2 20.6 1964 3 19.3 1964 4 18.7 1964 5 18.2 1964 6 17.3 1964 7 16.7 1964 8 16.6 1964 9 16.4 1964 10 16.4 1964 11 16.4 1964 12 16.8 1965 1 19.0 1965 2 19.1 1965 3 18.1 1965 4 17.4 1965 5 17.6 1965 6 17.0 1965 7 16.6 1965 8 16.4 1965 9 16.6 1965 10 16.0 1965 11 16.4 1965 12 16.5 1966 1 17.4 1966 2 18.8 1966 3 19.4 1966 4 18.2 1966 5 18.4 1966 6 17.9 1966 7 17.7 1966 8 17.4 1966 9 17.3 1966 10 17.0 1966 11 17.0 1966 12 18.0 1967 1 19.0 1967 2 19.5 1967 3 19.2 1967 4 17.8 1967 5 16.2 1967 6 15.6 1967 7 15.3 1967 8 15.7 1967 9 15.8 1967 10 16.0 1967 11 16.2 1967 12 16.2 1968 1 17.6 1968 2 19.6 1968 3 20.4 1968 4 21.3 1968 5 20.6 1968 6 19.5 1968 7 19.0 1968 8 18.4 1968 9 17.6 1968 10 17.5 1968 11 17.9 1968 12 18.6 1969 1 19.9 1969 2 20.4 1969 3 19.2 1969 4 18.1 1969 5 17.5 1969 6 16.8 1969 7 16.4 1969 8 16.2 1969 9 15.6 1969 10 16.2 1969 11 16.5 1969 12 16.8 1970 1 18.4 1970 2 19.6 1970 3 19.1 1970 4 17.6 1970 5 16.9 1970 6 16.2 1970 7 16.1 1970 8 15.4 1970 9 15.4 1970 10 15.0 1970 11 15.1 1970 12 16.4 1971 1 17.6 1971 2 17.6 1971 3 18.5 1971 4 16.6 1971 5 16.4 1971 6 15.5 1971 7 15.8 1971 8 16.0 1971 9 16.4 1971 10 16.1 1971 11 16.6 1971 12 17.1 1972 1 18.7 1972 2 19.0 1972 3 20.4 1972 4 20.5 1972 5 21.0 1972 6 19.5 1972 7 17.4 1972 8 17.3 1972 9 17.2 1972 10 17.3 1972 11 17.3 1972 12 17.8 1973 1 19.2 1973 2 19.8 1973 3 20.0 1973 4 19.1 1973 5 18.6 1973 6 17.8 1973 7 16.8 1973 8 16.9 1973 9 16.9 1973 10 17.3 1973 11 17.0 1973 12 17.2 1974 1 18.2 1974 2 19.1 1974 3 19.6 1974 4 19.8 1974 5 18.7 1974 6 18.0 1974 7 18.0 1974 8 18.0 1974 9 17.4 1974 10 16.8 1974 11 17.1 1974 12 17.2 1975 1 18.6 1975 2 20.6 1975 3 21.8 1975 4 21.4 1975 5 21.0 1975 6 21.4 1975 7 21.1 1975 8 20.0 1975 9 18.9 1975 10 19.0 1975 11 19.3 1975 12 21.4 1976 1 23.2 1976 2 23.0 1976 3 21.3 1976 4 18.4 1976 5 17.4 1976 6 16.6 1976 7 16.0 1976 8 15.5 1976 9 15.7 1976 10 16.2 1976 11 17.1 1976 12 16.4 1977 1 17.0 1977 2 18.2 1977 3 18.6 1977 4 18.9 1977 5 18.6 1977 6 19.1 1977 7 17.6 1977 8 16.8 1977 9 16.1 1977 10 15.8 1977 11 16.5 1977 12 16.3 1978 1 16.7 1978 2 18.1 1978 3 21.1 1978 4 19.8 1978 5 18.6 1978 6 16.9 1978 7 16.7 1978 8 16.1 1978 9 16.0 1978 10 15.9 1978 11 15.6 1978 12 16.4 1979 1 17.2 1979 2 21.0 1979 3 21.3 1979 4 19.6 1979 5 19.8 1979 6 19.9 1979 7 19.4 1979 8 19.1 1979 9 17.6 1979 10 18.0 1979 11 18.4 1979 12 20.2 1980 1 20.4 1980 2 20.5 1980 3 20.6 1980 4 20.6 1980 5 19.1 1980 6 18.2 1980 7 17.6 1980 8 17.0 1980 9 16.6 1980 10 16.6 1980 11 17.2 1980 12 17.8 1981 1 18.0 1981 2 20.0 1981 3 19.9 1981 4 19.1 1981 5 17.6 1981 6 16.5 1981 7 16.6 1981 8 15.9 1981 9 16.2 1981 10 16.6 1981 11 17.1 1981 12 17.3 1982 1 18.5 1982 2 18.5 1982 3 19.2 1982 4 19.0 1982 5 18.3 1982 6 17.3 1982 7 17.4 1982 8 17.4 1982 9 17.0 1982 10 17.2 1982 11 17.4 1982 12 18.3 1983 1 18.6 1983 2 18.8 1983 3 19.4 1983 4 19.1 1983 5 18.3 1983 6 18.0 1983 7 17.5 1983 8 16.8 1983 9 16.6 1983 10 16.6 1983 11 16.9 1983 12 17.6 1984 1 17.4 1984 2 18.8 1984 3 18.5 1984 4 18.3 1984 5 18.5 1984 6 17.6 1984 7 16.8 1984 8 16.8 1984 9 16.2 1984 10 17.0 1984 11 16.9 1984 12 17.0 1985 1 17.6 1985 2 18.8 1985 3 19.1 1985 4 18.9 1985 5 19.3 1985 6 18.6 1985 7 18.4 1985 8 17.6 1985 9 17.5 1985 10 19.3 1985 11 21.9 1985 12 23.7