YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | 47.00 | a | 50.54 | 57.65 | 61.57 | 64.90 | 69.90 | 73.03 | 75.00 | 69.07 | 58.90 | 47.97 | 45.42 | 60.08 | ||||||||||||
1916 | 31.00 | 45.17 | 49.74 | 57.70 | 61.71 | 68.37 | 68.81 | 73.23 | i | 68.03 | 57.77 | 48.87 | 38.84 | 54.18 | a | |||||||||||
1917 | 40.68 | 41.61 | 48.55 | 55.27 | 61.19 | 65.45 | a | 71.23 | a | 74.43 | a | 67.63 | 57.48 | 55.13 | 44.29 | 56.91 | ||||||||||
1918 | ----- | z | 45.32 | 51.39 | 61.47 | 63.35 | 73.10 | 76.00 | a | 74.45 | 75.00 | 59.68 | 51.13 | 46.81 | 61.61 | a | ||||||||||
1919 | 47.26 | 44.82 | 52.06 | 58.80 | 63.97 | 67.57 | 75.48 | 74.23 | 71.31 | a | 55.03 | 47.97 | 44.00 | 58.54 | ||||||||||||
1920 | 42.29 | 48.17 | 51.42 | 54.27 | 61.43 | c | 67.59 | c | 76.32 | 77.58 | 66.20 | 56.55 | 53.53 | 47.20 | a | 58.55 | ||||||||||
1921 | 44.35 | 49.00 | 51.63 | a | 56.33 | 63.03 | a | 67.87 | 72.13 | 72.83 | a | 65.03 | 60.84 | 49.72 | a | 40.77 | 57.80 | |||||||||
1922 | ----- | z | ----- | z | ----- | z | 50.27 | ----- | z | 72.90 | 75.77 | 74.84 | 69.57 | ----- | z | ----- | z | ----- | z | 68.67 | g | |||||
1923 | ----- | z | ----- | z | 52.39 | 61.23 | ----- | z | ----- | z | 76.32 | 78.71 | 73.17 | ----- | z | ----- | z | 47.29 | 64.85 | f | ||||||
1924 | 44.77 | 52.96 | a | 54.00 | 57.60 | ----- | z | 72.18 | b | ----- | z | 74.45 | ----- | z | 62.87 | 49.93 | ----- | z | 58.60 | d | ||||||
1925 | 46.87 | 50.68 | 51.23 | 58.55 | a | 68.97 | b | 70.03 | a | 75.55 | 73.81 | 69.73 | 59.17 | a | 52.17 | 50.13 | 60.57 | |||||||||
1926 | 45.45 | 52.29 | 57.84 | 66.52 | a | 64.94 | 73.13 | 76.58 | 73.03 | 68.43 | 61.83 | a | 54.60 | ----- | z | 63.15 | a | |||||||||
1927 | 42.61 | 49.79 | 50.80 | a | 56.57 | 60.87 | 71.70 | 75.06 | 75.90 | a | 67.47 | 59.77 | 49.40 | 39.48 | 58.29 | |||||||||||
1928 | 46.65 | 49.39 | a | 54.50 | a | 57.63 | 69.61 | 68.93 | 75.27 | a | 73.87 | 68.87 | 56.71 | 52.27 | 46.26 | 60.00 | ||||||||||
1929 | ----- | z | ----- | z | 52.71 | 54.53 | 64.00 | a | 67.57 | 75.48 | 75.25 | c | 72.23 | 65.33 | a | 50.13 | 44.48 | b | 62.17 | b | ||||||
1930 | 35.42 | 50.27 | b | 53.39 | 60.50 | 62.63 | a | 67.70 | 73.13 | a | 76.58 | 69.07 | 58.50 | a | 50.80 | 48.42 | 58.87 | |||||||||
1931 | 51.52 | 50.00 | 54.30 | a | 60.63 | 67.26 | 69.03 | 75.84 | 75.90 | 66.90 | 62.77 | 47.90 | ----- | z | 62.01 | a | ||||||||||
1932 | 40.90 | 45.41 | 51.94 | 58.03 | 63.81 | 72.00 | 69.52 | 73.23 | 72.53 | 62.13 | 55.57 | 44.26 | 59.11 | |||||||||||||
1933 | 43.65 | 42.71 | 53.68 | 59.10 | 60.13 | 67.47 | 72.39 | 77.90 | 64.83 | 60.65 | 53.57 | 48.68 | 58.73 | |||||||||||||
1934 | 49.42 | 55.14 | 57.71 | 65.83 | a | 66.87 | 71.63 | 72.87 | 76.26 | 66.97 | 62.90 | 55.20 | 47.23 | a | 62.34 | |||||||||||
1935 | 43.68 | 53.00 | 48.23 | 58.67 | 65.23 | a | 70.70 | 73.29 | 74.13 | 71.67 | 58.35 | 48.52 | a | 50.55 | b | 59.67 | ||||||||||
1936 | 46.32 | 37.48 | 49.48 | 59.77 | 65.94 | 70.53 | 73.29 | 75.68 | 67.50 | 63.26 | 53.41 | a | 48.16 | 59.24 | ||||||||||||
1937 | 33.97 | a | 46.45 | f | 56.63 | a | 54.97 | 64.84 | 70.50 | 73.71 | 73.45 | t | 69.31 | a | 64.58 | 51.27 | 47.42 | 58.72 | b | |||||||
1938 | 45.42 | 48.36 | 52.10 | a | 60.03 | 64.82 | i | 70.56 | c | 74.52 | 72.00 | 70.73 | 64.00 | 49.43 | 47.03 | 59.47 | a | |||||||||
1939 | 47.06 | 44.04 | 51.90 | 59.30 | 64.96 | c | 65.41 | a | 72.45 | 76.16 | 68.80 | 59.39 | 58.23 | 53.15 | e | 60.07 | ||||||||||
1940 | 47.32 | 50.07 | 54.94 | 60.83 | 67.81 | 73.37 | 72.77 | a | 74.26 | 72.05 | h | ----- | z | 47.26 | k | 49.32 | 61.19 | c | ||||||||
1941 | 50.00 | 53.89 | 60.35 | 62.33 | 63.74 | 67.87 | 75.84 | 71.84 | 64.00 | 61.55 | 55.50 | 47.77 | 61.22 | |||||||||||||
1942 | 46.71 | 48.93 | 52.39 | 59.63 | 63.35 | 67.17 | 73.29 | 75.45 | 69.97 | 63.48 | b | 50.34 | a | 46.90 | 59.80 | |||||||||||
1943 | 37.55 | 52.50 | 51.39 | 60.57 | 61.00 | 68.28 | a | 72.53 | a | 71.23 | 72.50 | 61.81 | 54.97 | 46.23 | a | 59.21 | ||||||||||
1944 | ----- | z | 48.48 | 51.39 | 59.52 | a | 63.48 | 70.37 | 75.53 | a | 72.68 | 71.60 | 64.90 | 53.10 | a | 45.55 | 61.51 | a | ||||||||
1945 | 48.55 | 49.26 | a | 51.39 | 53.43 | b | 66.53 | a | 67.63 | c | 75.55 | b | 74.32 | 67.90 | a | 61.00 | 47.83 | 45.74 | 59.09 | |||||||
1946 | 46.23 | 48.29 | 52.19 | 55.97 | 68.77 | 68.67 | 72.21 | b | 74.54 | c | 68.97 | a | 56.97 | 48.90 | a | 44.10 | a | 58.82 | ||||||||
1947 | 40.60 | a | 51.32 | 55.84 | 60.40 | 67.19 | 68.47 | 73.71 | 73.29 | 69.69 | a | 60.03 | a | 49.00 | 47.06 | 59.72 | ||||||||||
1948 | 45.03 | 44.62 | 51.06 | 55.33 | 62.32 | 71.47 | 71.58 | 69.10 | 68.60 | 59.94 | 48.83 | 40.23 | a | 57.34 | ||||||||||||
1949 | 37.03 | 43.43 | 53.23 | 58.70 | 67.10 | 69.10 | 72.55 | 72.35 | 71.43 | 56.97 | 57.43 | 43.10 | 58.53 | |||||||||||||
1950 | 28.39 | 47.32 | 49.00 | 56.67 | 60.74 | 70.70 | 74.23 | 74.87 | 69.47 | 57.97 | 50.17 | 50.94 | 57.54 | |||||||||||||
1951 | 43.13 | 46.61 | 46.68 | 62.50 | 65.42 | 72.03 | 75.84 | 73.29 | 71.37 | 59.00 | 51.33 | 40.65 | 58.99 | |||||||||||||
1952 | 40.68 | 48.59 | 50.55 | 58.80 | 64.68 | 65.37 | 73.29 | 73.48 | 71.77 | 64.39 | 51.43 | 48.61 | 59.30 | |||||||||||||
1953 | 50.32 | 48.46 | 51.48 | 58.07 | 65.84 | 65.07 | 74.16 | 74.71 | 69.80 | 61.42 | 54.97 | 47.83 | b | 60.18 | ||||||||||||
1954 | 39.41 | b | 50.14 | 52.13 | 54.40 | 65.74 | 65.32 | b | 69.35 | 69.52 | b | 67.45 | a | 59.10 | a | 56.03 | 47.94 | 58.04 | ||||||||
1955 | 44.58 | 44.64 | 45.65 | 53.82 | b | 58.06 | 65.97 | 68.10 | 71.80 | a | 67.30 | 58.03 | 43.60 | 42.39 | 55.33 | |||||||||||
1956 | 44.19 | 41.14 | 48.35 | 60.80 | 69.00 | 64.67 | 75.68 | 74.10 | 68.03 | a | 56.39 | 49.38 | a | 45.40 | a | 58.09 | ||||||||||
1957 | 35.84 | 44.96 | 52.06 | 58.60 | 68.00 | a | 69.30 | 70.71 | 72.61 | 74.83 | a | 60.17 | a | 50.69 | a | 49.37 | a | 58.93 | ||||||||
1958 | 49.35 | 54.39 | 54.16 | 59.73 | 72.70 | a | 76.37 | 82.13 | 77.74 | 69.30 | 61.77 | 48.20 | 48.06 | 62.83 | ||||||||||||
1959 | 44.84 | 45.71 | 50.13 | 58.45 | a | 65.19 | 70.70 | 77.26 | 72.06 | 65.93 | 58.55 | 49.10 | 46.23 | 58.68 | ||||||||||||
1960 | 42.74 | 48.31 | 51.29 | 59.10 | a | 62.00 | 69.37 | 79.10 | 71.06 | 68.69 | a | 60.71 | 49.57 | 45.42 | 58.95 | |||||||||||
1961 | 49.84 | 50.39 | 53.74 | 55.50 | 64.87 | a | 72.93 | 76.81 | 78.48 | 67.90 | 58.10 | 48.67 | 44.55 | 60.15 | ||||||||||||
1962 | 44.61 | 50.07 | 50.23 | 58.63 | 59.71 | 69.17 | 72.42 | 70.71 | 69.59 | a | 60.13 | 52.57 | 47.87 | 58.81 | ||||||||||||
1963 | 38.45 | 54.11 | 52.84 | 57.17 | 67.23 | 68.04 | c | 71.52 | 75.29 | 73.93 | a | 61.55 | 50.60 | 46.68 | 59.78 | |||||||||||
1964 | 46.55 | 48.36 | a | 50.00 | 54.70 | 62.32 | 68.10 | 71.65 | 71.84 | 66.23 | 61.65 | 47.60 | 40.13 | 57.43 | ||||||||||||
1965 | 41.84 | 47.32 | 54.13 | 59.00 | 61.00 | 70.37 | 76.74 | 74.03 | 67.40 | 62.03 | 52.97 | 45.06 | 59.32 | |||||||||||||
1966 | 44.55 | 49.11 | 53.00 | 58.47 | 64.19 | 68.10 | 71.00 | a | 74.26 | 70.73 | 59.03 | 51.80 | 49.16 | 59.45 | ||||||||||||
1967 | 47.28 | b | 48.93 | 49.84 | 55.50 | 63.81 | 72.90 | 75.16 | 80.45 | 73.77 | 60.23 | 52.37 | 45.52 | 60.48 | ||||||||||||
1968 | 45.94 | 54.86 | 54.58 | 55.97 | 66.03 | 68.47 | 77.03 | 68.00 | 67.70 | 59.97 | 53.10 | 41.42 | 59.42 | |||||||||||||
1969 | 34.52 | 48.57 | 54.48 | 56.17 | 68.52 | 73.50 | 73.87 | 71.45 | 68.73 | 60.74 | 53.48 | a | 48.93 | a | 59.41 | |||||||||||
1970 | 44.03 | 54.54 | 55.13 | 55.67 | 65.19 | 73.93 | 75.52 | 75.32 | 66.21 | a | 59.97 | 51.90 | 44.42 | 60.15 | ||||||||||||
1971 | 42.70 | a | 47.54 | 48.55 | 59.27 | 65.39 | 64.50 | 76.16 | 77.94 | 67.70 | 57.84 | 50.48 | a | 41.74 | 58.32 | |||||||||||
1972 | 41.35 | 48.83 | 53.48 | 54.57 | 68.94 | 67.38 | a | 74.35 | 76.39 | 65.59 | a | 58.35 | 52.30 | 41.61 | 58.60 | |||||||||||
1973 | 44.87 | a | 49.86 | 51.13 | 58.77 | 68.00 | 67.87 | 73.74 | 71.13 | a | 71.60 | 58.35 | 46.47 | 48.80 | a | 59.22 | ||||||||||
1974 | 45.26 | 48.07 | 52.29 | 57.60 | 61.06 | 69.70 | 71.29 | 74.55 | 76.33 | 62.42 | 51.77 | 47.97 | 59.86 | |||||||||||||
1975 | 43.26 | 44.50 | 50.29 | 55.10 | 63.97 | b | 67.23 | 74.23 | 69.77 | a | 71.80 | 59.32 | 50.03 | a | 47.23 | 58.06 | ||||||||||
1976 | 46.94 | 46.82 | a | 48.19 | 58.53 | 64.45 | 66.30 | 73.81 | 68.68 | 70.10 | 60.68 | 52.33 | 49.32 | 58.85 | ||||||||||||
1977 | 42.87 | 53.39 | 50.16 | 60.27 | 61.68 | 69.60 | 70.77 | 77.71 | 65.57 | 59.84 | 48.43 | 44.48 | 58.73 | |||||||||||||
1978 | 45.03 | 50.50 | 54.52 | 58.00 | 63.45 | 72.70 | 75.61 | 73.42 | 65.10 | 62.13 | 46.10 | 41.90 | 59.04 | |||||||||||||
1979 | 38.55 | 46.25 | 56.74 | 57.63 | 65.29 | 68.93 | 75.52 | 73.23 | 71.70 | 61.81 | 51.10 | 49.52 | 59.69 | |||||||||||||
1980 | 40.32 | 50.76 | 50.71 | 62.50 | b | 63.81 | 66.07 | 73.13 | 71.26 | 67.80 | 64.10 | 51.83 | 48.00 | 59.19 | ||||||||||||
1981 | 51.47 | a | 50.18 | 57.37 | a | 57.70 | 63.71 | 65.50 | 72.48 | 78.00 | 70.53 | 58.77 | 55.07 | 46.39 | 60.60 | |||||||||||
1982 | 43.32 | 47.89 | 52.58 | 57.57 | 64.84 | 74.07 | 71.47 | a | 73.23 | 70.23 | ----- | z | 48.76 | a | 47.10 | 59.19 | a | |||||||||
1983 | 51.42 | 54.00 | 57.10 | 60.93 | 68.97 | 68.47 | 72.19 | 75.94 | 67.37 | 58.81 | 52.60 | 39.43 | a | 60.60 | ||||||||||||
1984 | 47.39 | 51.48 | 55.90 | 57.67 | 62.29 | c | 67.47 | ----- | z | 73.48 | 68.13 | 57.29 | 49.80 | 39.23 | 57.28 | a | ||||||||||
1985 | 41.93 | a | 45.78 | a | 51.68 | 57.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.12 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.68 | 48.65 | 52.42 | 58.21 | 64.65 | 69.28 | 73.91 | 74.05 | 69.27 | 60.24 | 51.18 | 45.84 | 59.19 | |||||||||||||
S.D. | 4.76 | 3.56 | 2.82 | 2.77 | 2.80 | 2.65 | 2.43 | 2.53 | 2.62 | 2.32 | 2.82 | 3.23 | 1.22 | |||||||||||||
SKEW | -0.90 | -0.43 | 0.32 | 0.21 | 0.23 | 0.30 | 0.24 | -0.02 | 0.41 | 0.19 | 0.17 | -0.47 | 0.09 | |||||||||||||
MAX | 51.52 | 55.14 | 60.35 | 66.52 | 72.70 | 76.37 | 82.13 | 80.45 | 76.33 | 65.33 | 58.23 | 53.15 | 62.83 | |||||||||||||
MIN | 28.39 | 37.48 | 45.65 | 50.27 | 58.06 | 64.50 | 68.10 | 68.00 | 64.00 | 55.03 | 43.60 | 38.84 | 55.33 | |||||||||||||
YRS | 66 | 67 | 70 | 71 | 66 | 69 | 68 | 68 | 68 | 66 | 67 | 66 | 56 |