YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.79 | k | 47.90 | 47.90 | k | |
1910 | 46.26 | 47.46 | 50.48 | 53.47 | 54.68 | 55.50 | 60.06 | 59.65 | 61.33 | 57.58 | 53.23 | 50.74 | 54.20 | |||||||||||||
1911 | 50.19 | 46.54 | 52.58 | 51.53 | 53.03 | 55.83 | 59.39 | 60.23 | 59.00 | 56.39 | 54.00 | 48.81 | 53.96 | |||||||||||||
1912 | 49.55 | 49.31 | 48.77 | 49.10 | 53.26 | 56.37 | 59.26 | 59.77 | 59.47 | 57.13 | 54.43 | 48.74 | 53.76 | |||||||||||||
1913 | 45.94 | 48.29 | 48.97 | 50.03 | 54.06 | 57.57 | 61.13 | 61.68 | 62.00 | j | 58.94 | 54.47 | 49.45 | 53.68 | a | |||||||||||
1914 | 50.32 | 50.79 | 53.06 | 52.93 | 53.58 | 56.43 | 59.93 | a | 61.00 | 59.03 | 60.16 | 56.57 | 48.65 | 55.20 | ||||||||||||
1915 | 49.48 | 49.32 | 52.19 | 53.13 | 54.00 | 57.23 | 61.32 | 61.84 | 59.34 | a | 54.97 | ----- | z | ----- | z | 55.28 | b | |||||||||
1916 | 47.00 | v | 47.69 | 50.55 | 50.37 | 52.74 | 54.67 | 58.65 | 59.61 | 57.10 | 53.39 | 50.30 | 45.81 | 52.81 | a | |||||||||||
1917 | 45.03 | 46.71 | 46.23 | 49.83 | 50.65 | 56.10 | 61.58 | 61.06 | 59.10 | 58.52 | 53.20 | 51.19 | 53.27 | |||||||||||||
1918 | 48.26 | 47.64 | 51.00 | 52.20 | 52.61 | 59.57 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.88 | f | ||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.84 | 71.32 | 69.30 | c | 65.61 | c | 55.15 | q | 57.80 | a | 67.17 | g | ||
1920 | 58.77 | a | 57.46 | a | 58.27 | a | 59.07 | 61.74 | 61.30 | 59.61 | 63.77 | 62.17 | 60.06 | 55.83 | 49.65 | 58.98 | ||||||||||
1921 | 48.07 | a | 50.21 | 53.32 | 53.17 | a | 52.77 | 57.77 | 62.00 | 63.55 | 61.80 | 58.39 | 55.87 | 52.58 | 55.79 | |||||||||||
1922 | 47.87 | 49.32 | 50.74 | 52.63 | 55.17 | a | 58.60 | 60.90 | 63.43 | a | 63.57 | 57.76 | b | 53.60 | 51.35 | 55.41 | ||||||||||
1923 | 51.39 | 51.11 | a | 55.90 | a | 54.23 | 58.03 | a | 57.77 | 61.52 | 61.55 | 63.07 | 60.45 | b | 59.40 | 53.26 | 57.31 | |||||||||
1924 | 51.97 | 54.96 | a | 54.32 | 54.03 | a | 57.65 | 59.70 | 61.84 | 68.04 | e | 57.67 | 52.52 | 50.37 | 46.68 | 55.81 | ||||||||||
1925 | 45.23 | 48.11 | 48.45 | 49.97 | 54.71 | 57.90 | 62.77 | 61.26 | 57.30 | 55.52 | 50.73 | 51.40 | a | 53.61 | ||||||||||||
1926 | 48.32 | 49.39 | 53.61 | 56.53 | 56.35 | 59.93 | 60.55 | 62.35 | 57.87 | 56.65 | 52.47 | 48.77 | 55.23 | |||||||||||||
1927 | 46.71 | 49.57 | 48.66 | b | 50.03 | 52.71 | 56.70 | 60.35 | 61.52 | 57.83 | 56.19 | 54.20 | 49.55 | 53.67 | ||||||||||||
1928 | 47.77 | 49.29 | a | 50.81 | 50.37 | 56.35 | 57.67 | 59.43 | a | 60.29 | 58.17 | 53.87 | 51.34 | a | 47.84 | 53.60 | ||||||||||
1929 | 46.40 | a | 45.75 | 47.42 | 49.13 | 54.81 | 57.47 | 62.10 | 63.29 | 61.77 | 58.77 | 51.60 | 52.94 | 54.29 | ||||||||||||
1930 | 48.39 | 49.36 | 50.79 | b | 52.87 | 52.13 | 57.63 | 60.48 | 62.77 | 59.23 | 56.26 | 51.13 | 48.52 | 54.13 | ||||||||||||
1931 | 49.87 | 51.86 | 53.03 | 54.97 | 59.06 | 60.60 | 67.42 | 66.81 | 60.57 | 60.45 | 50.57 | 46.87 | 56.84 | |||||||||||||
1932 | 45.06 | 47.66 | 50.81 | 50.20 | 54.68 | 55.87 | 60.00 | 59.13 | 59.55 | a | 56.55 | 54.23 | 47.48 | 53.43 | ||||||||||||
1933 | 45.00 | 44.61 | 47.97 | 50.57 | 50.65 | 54.93 | 60.32 | 60.55 | 57.07 | 56.48 | 51.53 | 47.19 | 52.24 | |||||||||||||
1934 | 47.29 | 50.96 | 52.48 | 53.97 | 55.48 | 55.14 | a | 60.81 | 61.39 | 60.23 | 55.00 | a | 51.37 | 49.87 | 54.50 | |||||||||||
1935 | 47.06 | 49.92 | d | 46.00 | 51.37 | 53.65 | 51.67 | 57.42 | 59.94 | 59.27 | 55.87 | 48.83 | 48.37 | a | 52.45 | |||||||||||
1936 | 47.77 | 48.74 | b | 49.90 | a | 49.60 | 55.45 | 58.67 | 64.16 | 63.47 | a | 59.73 | 56.90 | 53.03 | a | 48.74 | 54.68 | |||||||||
1937 | 40.23 | 43.67 | a | 46.48 | 48.93 | 54.93 | a | 56.80 | 61.30 | a | 61.24 | j | 61.00 | 56.03 | 52.46 | b | 50.26 | 52.01 | a | |||||||
1938 | 48.37 | a | 47.64 | 49.27 | a | 51.60 | 53.80 | a | 57.37 | 60.06 | 62.45 | 61.17 | 54.32 | 47.87 | 50.45 | 53.70 | ||||||||||
1939 | 46.61 | 43.11 | 46.71 | 52.07 | 53.77 | 56.93 | 60.57 | a | 61.55 | 63.97 | 56.58 | 54.28 | a | 50.84 | 53.92 | |||||||||||
1940 | 50.30 | a | 49.38 | 51.00 | 52.76 | a | 56.16 | 58.40 | 59.68 | 61.32 | 58.97 | 56.74 | 50.76 | a | 49.74 | 54.60 | ||||||||||
1941 | 49.52 | 51.21 | 52.40 | a | 51.17 | 56.68 | 57.40 | 60.03 | 62.03 | a | 57.90 | a | 55.55 | 52.00 | b | 49.52 | 54.62 | |||||||||
1942 | 47.58 | 46.32 | 46.74 | 51.70 | 52.77 | 56.50 | 59.94 | 59.80 | a | 57.17 | 56.23 | 50.57 | 47.74 | 52.75 | ||||||||||||
1943 | 47.68 | 49.36 | 51.39 | 51.96 | g | 54.33 | g | 54.62 | a | 59.68 | 60.81 | 59.10 | 56.35 | 50.10 | 49.77 | 53.89 | b | |||||||||
1944 | 47.08 | e | 45.97 | 48.61 | 49.20 | 54.13 | 54.93 | 57.65 | 58.32 | 59.17 | 57.58 | 51.87 | 47.87 | a | 52.70 | |||||||||||
1945 | 45.19 | 47.79 | 46.35 | 49.07 | 51.66 | b | 56.55 | a | 61.37 | d | 60.88 | f | ----- | z | ----- | z | 48.32 | b | 47.40 | a | 50.41 | c | ||||
1946 | 45.07 | a | 43.23 | b | 47.90 | b | 50.96 | b | 54.23 | a | 56.24 | a | 60.70 | a | 61.90 | a | 60.97 | 54.29 | 49.37 | 47.35 | 52.68 | |||||
1947 | 42.71 | 47.96 | a | 50.20 | a | 52.63 | 56.39 | 57.41 | a | 58.97 | b | 60.79 | b | 61.00 | a | 56.90 | 48.61 | b | 46.39 | 53.33 | ||||||
1948 | 46.70 | a | 44.28 | 44.94 | 50.83 | a | 52.26 | 55.79 | a | 57.10 | 57.52 | 57.20 | 54.16 | 48.21 | b | 44.32 | 51.11 | |||||||||
1949 | 40.27 | a | 43.43 | 46.13 | 51.03 | 53.30 | a | 58.55 | a | 60.52 | b | 59.81 | 59.93 | 54.06 | 52.13 | 44.90 | 52.01 | |||||||||
1950 | 41.74 | 45.18 | 46.97 | 51.33 | 52.67 | a | 54.66 | a | 62.13 | 59.29 | 57.20 | 53.94 | 51.17 | 49.42 | 52.14 | |||||||||||
1951 | 45.90 | 45.07 | 46.55 | 51.62 | a | 52.16 | 56.73 | 60.26 | 60.03 | 59.47 | 56.61 | 51.50 | d | 46.71 | 52.72 | |||||||||||
1952 | 44.03 | 47.24 | 46.39 | 50.13 | 53.52 | 53.93 | 56.58 | 60.34 | b | 59.21 | a | 55.94 | 49.40 | 45.74 | 51.87 | |||||||||||
1953 | 48.61 | 46.57 | 45.87 | 49.38 | a | 51.03 | a | 54.33 | 61.10 | a | 59.21 | c | 57.57 | 55.13 | 51.03 | a | 46.00 | a | 52.15 | |||||||
1954 | 45.00 | 47.96 | a | 47.03 | 49.57 | 53.03 | 55.67 | 63.06 | 61.94 | 56.97 | a | 53.35 | 51.53 | 46.30 | a | 52.62 | ||||||||||
1955 | 42.57 | a | 43.07 | 47.10 | a | 48.75 | f | 50.27 | a | 54.76 | e | 57.77 | 60.55 | 58.50 | 52.48 | 47.79 | b | 47.23 | 51.10 | a | ||||||
1956 | 44.55 | 41.17 | 44.48 | 46.93 | a | 51.55 | 53.27 | 58.03 | 57.90 | 56.17 | 52.35 | 47.90 | 44.84 | 49.93 | ||||||||||||
1957 | 42.94 | 46.89 | 46.39 | 47.67 | 51.23 | 55.67 | 57.39 | 59.61 | 55.97 | 53.26 | 47.27 | 45.97 | 50.85 | |||||||||||||
1958 | 45.74 | 48.46 | 44.74 | 49.00 | 51.71 | 54.79 | a | 57.58 | 60.74 | 58.03 | 57.13 | 47.70 | 48.27 | a | 51.99 | |||||||||||
1959 | 48.27 | a | 46.71 | 50.48 | 53.50 | 54.74 | 59.40 | 64.29 | 63.42 | 62.13 | 58.26 | 52.97 | 49.61 | 55.32 | ||||||||||||
1960 | 44.90 | 46.10 | 49.68 | 51.27 | 54.13 | 57.13 | 60.74 | 61.58 | 61.53 | 56.23 | 49.77 | 45.39 | 53.20 | |||||||||||||
1961 | 48.35 | 48.54 | 49.61 | 50.90 | 52.93 | a | 56.60 | 61.48 | 62.32 | 58.13 | 56.29 | 49.87 | 45.10 | 53.34 | ||||||||||||
1962 | 45.90 | 47.38 | b | 46.06 | ----- | z | 51.70 | d | 55.83 | 57.55 | b | 59.77 | 57.60 | 54.48 | 51.93 | 47.97 | 52.38 | a | ||||||||
1963 | 45.84 | 50.04 | 47.10 | 49.17 | 55.03 | 56.73 | 58.23 | 61.42 | 64.31 | a | 59.26 | 51.57 | 46.97 | 53.80 | ||||||||||||
1964 | 45.30 | a | 45.11 | a | 47.03 | 49.21 | a | 50.84 | 54.79 | a | 60.32 | 65.52 | b | 63.72 | a | 62.59 | b | 52.00 | 51.71 | 54.01 | ||||||
1965 | 48.71 | 48.00 | 51.90 | 53.30 | 56.03 | 57.30 | 60.50 | a | ----- | z | 61.47 | 61.00 | ----- | z | 49.35 | 54.76 | b | |||||||||
1966 | 47.77 | a | 48.46 | 52.35 | 56.90 | ----- | z | 60.60 | 61.74 | 65.17 | a | 62.67 | 60.29 | 54.80 | 50.87 | 56.51 | a | |||||||||
1967 | 49.13 | a | 49.54 | b | 52.42 | 49.70 | 57.10 | 60.03 | a | 66.55 | 69.77 | 67.87 | 60.39 | 58.97 | a | 50.59 | b | 57.67 | ||||||||
1968 | ----- | z | 50.86 | ----- | z | 56.42 | d | 59.24 | b | 60.37 | 63.19 | 62.71 | 61.53 | 56.74 | 54.63 | 47.55 | 57.33 | b | ||||||||
1969 | 51.97 | 48.14 | 49.16 | 55.63 | 56.87 | 61.00 | ----- | z | 64.65 | 61.73 | 55.45 | ----- | z | 48.45 | 55.31 | b | ||||||||||
1970 | 51.19 | 53.07 | 41.71 | 49.30 | 50.77 | a | 52.41 | a | 56.71 | 54.42 | 49.80 | 49.30 | a | 44.03 | 40.43 | a | 49.43 | |||||||||
1971 | 39.68 | 42.39 | 45.32 | 47.03 | 50.77 | a | 52.67 | 59.19 | 63.29 | 60.23 | 51.23 | a | 47.50 | 42.10 | 50.12 | |||||||||||
1972 | 42.03 | 45.41 | 49.26 | 48.37 | 53.10 | 58.07 | 60.77 | 61.81 | 58.40 | 56.10 | 48.83 | 44.42 | 52.21 | |||||||||||||
1973 | 43.50 | a | 47.50 | 45.65 | 46.50 | 51.45 | 53.70 | ----- | z | 59.16 | 58.37 | 52.19 | 48.23 | 47.39 | 50.33 | a | ||||||||||
1974 | 44.55 | 45.29 | 47.32 | 47.97 | 51.71 | 55.97 | 59.03 | 59.58 | 59.93 | a | 54.90 | 49.90 | 44.26 | 51.70 | ||||||||||||
1975 | 43.10 | 44.46 | 46.72 | f | 46.12 | v | 51.19 | 54.80 | 57.06 | 58.00 | 59.97 | 54.00 | 48.93 | a | 43.74 | 51.53 | b | |||||||||
1976 | 44.58 | 47.03 | 46.61 | 47.57 | 53.48 | 57.20 | 61.10 | 60.16 | 62.13 | 58.68 | 53.47 | 49.58 | 53.47 | |||||||||||||
1977 | 48.65 | 49.82 | 48.63 | a | 53.73 | 55.06 | 56.77 | 58.87 | 63.27 | a | 61.10 | 58.10 | 53.97 | 54.47 | a | 55.20 | ||||||||||
1978 | 52.94 | 50.63 | a | 54.58 | 54.37 | 58.32 | 62.00 | 62.32 | 62.71 | 61.63 | 59.50 | a | 49.97 | 45.13 | 56.17 | |||||||||||
1979 | 47.71 | 45.86 | 50.42 | 52.07 | 57.03 | a | 60.20 | 60.19 | 62.19 | 62.28 | a | 57.90 | b | 52.17 | 49.61 | 54.80 | ||||||||||
1980 | 52.29 | 52.28 | 49.94 | 53.90 | 55.87 | 57.37 | 62.93 | a | 61.86 | c | ----- | z | ----- | z | ----- | z | 49.94 | 55.15 | c | |||||||
1981 | 51.58 | 51.96 | 52.16 | 54.10 | 57.32 | 62.13 | 63.45 | 64.48 | 62.13 | 58.61 | 55.83 | 51.16 | 57.08 | |||||||||||||
1982 | 48.77 | 51.64 | 51.32 | 52.77 | 54.87 | a | 55.03 | a | 59.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.38 | e | |||||
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | 46.55 | 52.33 | 54.45 | 57.70 | 63.81 | 62.00 | 60.90 | 60.48 | 51.86 | a | 50.13 | 56.02 | b | |||||||||
1986 | 53.10 | a | 51.50 | 52.90 | 54.07 | 56.29 | 58.83 | 60.26 | 62.48 | 58.53 | 57.48 | 55.33 | 51.48 | 56.02 | ||||||||||||
1987 | 48.13 | 50.36 | 51.30 | a | 53.65 | d | 56.35 | 58.47 | 58.65 | 61.03 | 61.03 | 60.71 | ----- | z | 44.17 | m | 55.97 | b | ||||||||
1988 | 47.45 | 48.86 | 50.61 | 51.77 | 52.81 | 55.33 | 62.16 | 61.97 | 59.80 | 58.35 | 51.47 | 47.81 | 54.03 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.15 | 48.05 | 49.33 | 51.51 | 54.14 | 56.95 | 60.63 | 61.67 | 59.95 | 56.68 | 51.63 | 48.41 | 53.78 | |||||||||||||
S.D. | 3.30 | 2.92 | 3.04 | 2.52 | 2.37 | 2.23 | 2.48 | 2.62 | 2.73 | 2.78 | 2.82 | 2.81 | 1.92 | |||||||||||||
SKEW | 0.33 | 0.23 | 0.26 | 0.40 | 0.60 | 0.19 | 1.52 | 1.02 | 0.21 | 0.23 | 0.26 | 0.14 | 0.21 | |||||||||||||
MAX | 58.77 | 57.46 | 58.27 | 59.07 | 61.74 | 62.13 | 71.84 | 71.32 | 69.30 | 65.61 | 59.40 | 57.80 | 58.98 | |||||||||||||
MIN | 39.68 | 41.17 | 41.71 | 46.50 | 50.27 | 51.67 | 56.58 | 54.42 | 49.80 | 49.30 | 44.03 | 40.43 | 49.43 | |||||||||||||
YRS | 73 | 75 | 74 | 72 | 74 | 76 | 74 | 72 | 72 | 73 | 69 | 74 | 57 |