| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.68 | 71.67 | 64.13 | a | 50.83 | 43.96 | d | 61.85 | ||||
| 1917 | 45.48 | 49.14 | 48.65 | 57.13 | 62.37 | a | 71.47 | ----- | z | ----- | z | ----- | z | ----- | z | 58.43 | 52.61 | 55.66 | ||||||||
| 1918 | 50.90 | 49.93 | 55.74 | 63.87 | 64.65 | 80.03 | 78.13 | 78.32 | 75.80 | 62.90 | 50.30 | 45.52 | 63.01 | |||||||||||||
| 1919 | 46.68 | 47.14 | 53.39 | 60.13 | 65.23 | 71.03 | 81.23 | 80.97 | 69.87 | 57.55 | 51.27 | 42.35 | 60.57 | |||||||||||||
| 1920 | 47.13 | 49.55 | 51.16 | 55.43 | 67.42 | 72.43 | 79.71 | 83.42 | 70.07 | 59.13 | 51.87 | 47.39 | 61.23 | |||||||||||||
| 1921 | 46.74 | 52.82 | 54.61 | 58.77 | 64.42 | 73.57 | 80.87 | 81.10 | 72.53 | 67.71 | 54.17 | 44.65 | 62.66 | |||||||||||||
| 1922 | 42.29 | 45.57 | 51.52 | 55.97 | 67.13 | 78.90 | 85.42 | 78.42 | 77.93 | 63.16 | 47.87 | 45.81 | 61.67 | |||||||||||||
| 1923 | 46.68 | 46.61 | 55.10 | 60.37 | 66.26 | 71.50 | 77.13 | 82.74 | 75.00 | 63.16 | 57.40 | 48.55 | 62.54 | |||||||||||||
| 1924 | 47.19 | 55.31 | 53.35 | 64.03 | 71.97 | 76.80 | 82.65 | 79.45 | 74.80 | 61.81 | 50.30 | 39.71 | 63.11 | |||||||||||||
| 1925 | 49.84 | 53.96 | 56.26 | 60.87 | 69.48 | 74.50 | 79.55 | 77.74 | 67.17 | 59.77 | 51.73 | 49.16 | 62.50 | |||||||||||||
| 1926 | 46.97 | 52.25 | 64.13 | 69.33 | 67.81 | 79.97 | 85.00 | 80.06 | 70.90 | 66.45 | 57.20 | 48.45 | b | 65.71 | ||||||||||||
| 1927 | 47.68 | 51.18 | 53.61 | 60.13 | 63.45 | 73.63 | 81.23 | 83.65 | 70.03 | 64.87 | 57.13 | 44.13 | 62.56 | |||||||||||||
| 1928 | 50.19 | 52.03 | 58.35 | 59.73 | 70.77 | e | 71.50 | 81.77 | 81.87 | 73.53 | 60.13 | a | 54.73 | 44.58 | 63.27 | |||||||||||
| 1929 | 38.74 | 44.18 | 55.68 | 54.23 | 66.35 | 70.87 | 80.87 | 83.94 | 77.90 | 69.29 | 53.93 | 50.81 | 62.23 | |||||||||||||
| 1930 | 36.26 | 54.50 | 59.87 | 64.28 | a | 63.97 | 71.57 | 80.61 | 83.66 | b | 73.73 | 63.29 | 51.70 | 46.65 | 62.51 | |||||||||||
| 1931 | 50.90 | 51.54 | 56.87 | 65.87 | 74.32 | 73.53 | 84.81 | 84.03 | 74.63 | 65.00 | 50.77 | 45.19 | 64.79 | |||||||||||||
| 1932 | 46.00 | 49.86 | 56.48 | 60.50 | 64.55 | 76.10 | 78.16 | 80.87 | 78.77 | 67.61 | 56.53 | 43.26 | 63.22 | |||||||||||||
| 1933 | 45.10 | 46.46 | 55.03 | 60.53 | 60.45 | 71.07 | 81.71 | 83.61 | 69.60 | 67.42 | 52.47 | 52.61 | 62.17 | |||||||||||||
| 1934 | 53.13 | 56.36 | 64.87 | 68.17 | 69.52 | 75.27 | 79.35 | 83.71 | 74.90 | 66.74 | 54.30 | 48.23 | 66.21 | |||||||||||||
| 1935 | 45.52 | 52.29 | 49.97 | 58.73 | 67.00 | 74.20 | 79.90 | 83.10 | 79.37 | 60.23 | 48.67 | 45.00 | 62.00 | |||||||||||||
| 1936 | 48.68 | 45.14 | 53.23 | 63.73 | 67.87 | 69.96 | g | 77.32 | 83.19 | 71.73 | 67.45 | 52.70 | 48.55 | 61.78 | ||||||||||||
| 1937 | 36.87 | 46.43 | 55.65 | 57.30 | 67.94 | 71.50 | 78.42 | 79.13 | 72.83 | 67.26 | 55.87 | 48.84 | 61.50 | |||||||||||||
| 1938 | 46.74 | 50.61 | 53.35 | 61.70 | 69.52 | 77.53 | 87.94 | 81.35 | 78.57 | 64.90 | 49.27 | 47.87 | 64.11 | |||||||||||||
| 1939 | 47.97 | 47.86 | 58.00 | 66.57 | 70.68 | 71.53 | 82.68 | 85.48 | 78.47 | 64.94 | 56.67 | 54.03 | 65.41 | |||||||||||||
| 1940 | 47.71 | 52.24 | 61.06 | 63.70 | 72.00 | 78.27 | 82.74 | 86.03 | 74.80 | 68.32 | 52.30 | 51.23 | 65.87 | |||||||||||||
| 1941 | 50.68 | 55.39 | 63.16 | 63.97 | 67.45 | 70.50 | 84.13 | 80.10 | 70.53 | 63.52 | 57.27 | 49.03 | 64.64 | |||||||||||||
| 1942 | 46.00 | 51.11 | 55.84 | 62.43 | 65.68 | 70.63 | 81.19 | 84.35 | 78.97 | 67.97 | 53.60 | 49.10 | 63.91 | |||||||||||||
| 1943 | 42.35 | 55.68 | 56.39 | 64.10 | 65.97 | 69.67 | 80.65 | 79.35 | 80.03 | 64.03 | 54.87 | 45.74 | 63.24 | |||||||||||||
| 1944 | 49.58 | 49.79 | 57.48 | 59.60 | 67.58 | 71.97 | 82.97 | 81.81 | 80.97 | 71.06 | 52.93 | 45.10 | 64.24 | |||||||||||||
| 1945 | 49.58 | 52.68 | 51.84 | 58.20 | 66.97 | 74.47 | 85.13 | 83.81 | 74.70 | 65.87 | 51.83 | 48.55 | 63.64 | |||||||||||||
| 1946 | 48.16 | 50.57 | 54.71 | 61.20 | 71.13 | 71.97 | 81.32 | 82.16 | 73.93 | 58.58 | 51.60 | 47.00 | 62.69 | |||||||||||||
| 1947 | 43.94 | 55.11 | 58.42 | 63.60 | 72.39 | 70.27 | 77.68 | 76.32 | 75.00 | 64.58 | 53.13 | 47.81 | 63.19 | |||||||||||||
| 1948 | 47.35 | 49.00 | 53.13 | 54.53 | 63.61 | 74.27 | 78.45 | 77.35 | 74.17 | 66.29 | 49.83 | 42.55 | 60.88 | |||||||||||||
| 1949 | 36.42 | 47.39 | 54.19 | 64.50 | 69.19 | 75.73 | 80.03 | 80.84 | 75.13 | 59.29 | 60.97 | 46.42 | 62.51 | |||||||||||||
| 1950 | 37.10 | 49.68 | 52.68 | 59.03 | 66.42 | 72.97 | 83.32 | 85.48 | 76.80 | 62.65 | 55.10 | 53.81 | 62.92 | |||||||||||||
| 1951 | 47.16 | 52.00 | 51.19 | 67.00 | 68.84 | 80.90 | 82.94 | 82.06 | 79.87 | 63.13 | 55.90 | 44.39 | 64.61 | |||||||||||||
| 1952 | 46.19 | 51.97 | 52.52 | 63.70 | 69.84 | 70.30 | 83.19 | 81.97 | 80.13 | 71.26 | 49.00 | 49.29 | 64.11 | |||||||||||||
| 1953 | 53.80 | a | 52.89 | 55.84 | 60.27 | 63.29 | 68.00 | 81.55 | 78.71 | 76.30 | 66.35 | 58.10 | 49.42 | 63.71 | ||||||||||||
| 1954 | 48.61 | 55.61 | 55.87 | 63.03 | 69.29 | 68.13 | 77.65 | 74.65 | 71.90 | 64.16 | 58.00 | 48.77 | 62.97 | |||||||||||||
| 1955 | 45.90 | 48.46 | 51.68 | 54.23 | 65.77 | 73.20 | 75.26 | 80.81 | 74.70 | 63.52 | 52.23 | 50.77 | 61.38 | |||||||||||||
| 1956 | 48.71 | 44.28 | 54.65 | 63.30 | 69.06 | 70.77 | 82.35 | 80.42 | 77.93 | 62.71 | 52.37 | 48.97 | 62.96 | |||||||||||||
| 1957 | 40.77 | 51.89 | 55.16 | 63.63 | 69.39 | 74.53 | 79.29 | 79.19 | 80.77 | 62.20 | a | 54.20 | 49.81 | 63.40 | ||||||||||||
| 1958 | 50.81 | 57.14 | 56.00 | 60.97 | 74.35 | 73.37 | 85.39 | 86.58 | 75.83 | 68.77 | 55.47 | 53.81 | 66.54 | |||||||||||||
| 1959 | 50.71 | 51.71 | 57.06 | 63.87 | 65.74 | 73.67 | 83.71 | 81.77 | 71.47 | 65.45 | 56.20 | 48.71 | 64.17 | |||||||||||||
| 1960 | 46.58 | 52.17 | 57.23 | 61.70 | 64.65 | 76.63 | 85.61 | 79.39 | 75.73 | 66.23 | 54.33 | 46.55 | 63.90 | |||||||||||||
| 1961 | 52.65 | 54.93 | 55.13 | 62.00 | 65.16 | 78.47 | 83.00 | 85.55 | 72.77 | 64.74 | 51.60 | 48.52 | 64.54 | |||||||||||||
| 1962 | 47.45 | 51.57 | 53.32 | 64.77 | 62.06 | 73.90 | 81.90 | 79.61 | 77.53 | 62.13 | 56.27 | 50.00 | 63.38 | |||||||||||||
| 1963 | 42.77 | 59.32 | 54.84 | 56.03 | 67.39 | 71.27 | 74.52 | 80.19 | 79.57 | 65.19 | 54.03 | 49.48 | 62.88 | |||||||||||||
| 1964 | 48.55 | 52.14 | 53.26 | 57.90 | 65.81 | ----- | z | ----- | z | ----- | z | 74.43 | ----- | z | 49.40 | 46.61 | 56.01 | |||||||||
| 1965 | 46.45 | ----- | z | ----- | z | ----- | z | ----- | z | 73.27 | ----- | z | ----- | z | 76.40 | ----- | z | 56.40 | 46.65 | 59.83 | ||||||
| 1966 | 47.55 | 51.29 | 56.23 | 64.90 | ----- | z | 76.10 | 79.71 | 81.65 | 78.77 | 65.87 | 54.27 | 50.45 | 64.25 | ||||||||||||
| 1967 | 49.90 | 55.07 | 53.97 | 56.07 | 69.29 | 77.80 | 85.16 | 90.68 | 82.90 | 65.52 | 54.87 | 47.00 | 65.69 | |||||||||||||
| 1968 | 47.97 | 59.38 | 59.58 | 60.30 | 66.55 | ----- | z | 82.58 | 76.45 | 73.17 | 62.84 | 54.53 | 46.65 | 62.73 | ||||||||||||
| 1969 | 41.97 | 48.00 | 59.52 | 61.13 | 71.68 | 72.53 | 77.74 | 79.65 | 75.27 | 63.00 | 53.33 | 48.87 | 62.72 | |||||||||||||
| 1970 | 49.55 | 56.75 | 58.19 | 57.03 | 68.23 | 77.30 | 84.58 | 83.55 | 73.40 | 64.84 | 54.27 | 46.55 | 64.52 | |||||||||||||
| 1971 | 47.48 | 49.64 | 52.26 | 60.10 | 66.16 | 70.90 | 81.16 | 82.81 | 73.00 | 61.45 | 51.10 | 46.52 | 61.88 | |||||||||||||
| 1972 | 45.71 | 53.03 | 59.26 | 57.37 | 69.74 | 74.43 | 85.55 | 84.94 | 74.53 | 63.94 | 55.50 | 44.42 | 64.03 | |||||||||||||
| 1973 | 46.97 | 56.14 | 53.52 | 63.40 | 71.71 | 74.53 | 84.58 | 80.03 | 76.13 | 65.16 | 49.00 | 50.00 | 64.26 | |||||||||||||
| 1974 | 45.94 | 49.50 | 55.94 | 60.20 | 65.10 | 76.23 | 80.39 | 82.23 | 84.27 | 69.55 | 56.30 | 50.13 | 64.65 | |||||||||||||
| 1975 | 50.32 | 51.21 | 52.32 | 56.30 | 68.61 | 72.33 | 80.55 | 76.90 | 80.50 | 62.61 | 53.20 | 49.42 | 62.86 | |||||||||||||
| 1976 | 50.45 | 50.93 | 54.52 | 60.37 | 68.97 | 70.80 | 81.26 | 77.52 | 75.63 | 67.68 | 56.27 | 46.81 | 63.43 | |||||||||||||
| 1977 | 51.06 | 56.11 | 54.84 | 65.23 | 63.39 | 75.40 | 80.71 | 85.81 | 71.07 | 63.94 | 53.03 | 50.06 | 64.22 | |||||||||||||
| 1978 | 50.29 | 54.39 | 60.74 | 58.57 | 66.13 | 75.40 | 81.13 | 80.00 | 71.23 | 67.94 | 52.33 | 44.10 | 63.52 | |||||||||||||
| 1979 | 39.94 | 49.96 | 60.23 | 61.27 | 70.23 | 76.37 | 84.26 | 79.26 | 77.60 | 68.48 | 51.20 | 53.16 | 64.33 | |||||||||||||
| 1980 | 45.94 | 54.10 | 55.29 | 64.43 | 65.94 | 68.57 | 80.81 | 80.00 | 78.37 | 69.00 | 57.38 | d | 52.45 | 64.36 | ||||||||||||
| 1981 | 48.48 | 54.14 | 57.45 | 61.23 | 64.74 | 72.27 | 79.68 | 85.42 | 77.80 | 63.16 | 55.30 | 49.45 | 64.09 | |||||||||||||
| 1982 | 44.45 | 51.39 | 55.32 | 59.67 | 68.81 | 74.43 | 77.55 | 81.26 | 74.53 | 63.61 | 51.60 | 46.65 | 62.44 | |||||||||||||
| 1983 | 51.90 | 53.96 | 56.87 | 60.97 | 68.45 | 70.23 | 74.65 | 78.97 | 72.77 | 64.90 | 54.37 | 44.29 | 62.69 | |||||||||||||
| 1984 | 50.06 | 54.48 | 59.71 | 58.63 | 66.52 | 71.37 | 82.35 | 82.19 | 76.30 | 61.55 | 51.57 | 44.87 | 63.30 | |||||||||||||
| 1985 | 44.16 | 50.68 | 54.16 | 65.10 | 68.55 | 76.80 | 87.35 | 83.16 | 71.37 | 64.29 | 46.30 | 44.20 | a | 63.01 | ||||||||||||
| 1986 | 51.52 | 53.41 | a | 63.13 | 60.43 | 69.00 | 78.77 | 78.32 | 87.52 | 71.83 | ----- | z | 54.17 | 48.23 | 65.12 | |||||||||||
| 1987 | 49.03 | 54.39 | 59.32 | 68.30 | 71.19 | 79.97 | 78.10 | 84.06 | 78.00 | 73.19 | 55.23 | 45.45 | 66.35 | |||||||||||||
| 1988 | 47.35 | 56.38 | 58.90 | 63.37 | 67.61 | 73.30 | 84.81 | 84.84 | 79.67 | 69.74 | 53.37 | 48.10 | 65.62 | |||||||||||||
| 1989 | 50.39 | 46.54 | 56.06 | 67.93 | 67.97 | 76.33 | 77.58 | 78.23 | 80.20 | 65.35 | 55.73 | 48.06 | 64.20 | |||||||||||||
| 1990 | 50.42 | 50.79 | 60.23 | 66.30 | 67.16 | 75.00 | 85.00 | ----- | z | 79.43 | 65.58 | 55.50 | 42.58 | 63.45 | ||||||||||||
| 1991 | 48.35 | 60.21 | 55.19 | 60.27 | 63.55 | 71.97 | 85.23 | 83.58 | 84.17 | 70.16 | 56.03 | 48.48 | 65.60 | |||||||||||||
| 1992 | 53.32 | 59.31 | 63.90 | 66.63 | 77.06 | 79.43 | 83.10 | 87.10 | 77.77 | 68.19 | 54.77 | 45.94 | 68.04 | |||||||||||||
| 1993 | 45.87 | 50.43 | 60.42 | 60.87 | 71.35 | 73.10 | 74.84 | 80.26 | 80.90 | 67.81 | 52.10 | 48.23 | 63.85 | |||||||||||||
| 1994 | 53.32 | 50.68 | 62.32 | 64.97 | 70.81 | 72.40 | 85.13 | 82.74 | 81.23 | 66.58 | 50.27 | 50.65 | 65.92 | |||||||||||||
| 1995 | 51.77 | 58.93 | 58.87 | 62.30 | 71.39 | 74.03 | 83.81 | 82.61 | 79.63 | 66.03 | 58.23 | 50.29 | 66.49 | |||||||||||||
| 1996 | 48.03 | 52.90 | 60.55 | i | 64.42 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.46 | |||
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.62 | r | 81.03 | 64.23 | 54.53 | 46.58 | 61.59 | |||||
| 1999 | 48.90 | 50.71 | 54.00 | 60.40 | 64.68 | 73.07 | 81.55 | 80.45 | 80.30 | 68.19 | 58.03 | 47.71 | 64.00 | |||||||||||||
| 2000 | 46.42 | 51.41 | 54.71 | 64.93 | 68.58 | 78.30 | 81.52 | 82.74 | 75.80 | 65.77 | 50.03 | 47.61 | 63.99 | |||||||||||||
| 2001 | 48.61 | 50.36 | 57.13 | 58.73 | 73.00 | 72.37 | 81.16 | 83.06 | 78.80 | 65.84 | 56.07 | 47.32 | 64.37 | |||||||||||||
| 2002 | 47.32 | 54.61 | 53.65 | 62.53 | 66.23 | 76.20 | 85.97 | 84.45 | 78.83 | 64.03 | 56.57 | 50.10 | 65.04 | |||||||||||||
| 2003 | 52.06 | 52.93 | 57.97 | 57.87 | 68.06 | 79.13 | 87.84 | 84.58 | 79.90 | 68.00 | 50.07 | 47.97 | 65.53 | |||||||||||||
| 2004 | 47.68 | 51.93 | 61.90 | 65.47 | 69.35 | 75.50 | 86.42 | 84.42 | 72.33 | 63.00 | 51.00 | 46.10 | 64.59 | |||||||||||||
| 2005 | 47.32 | 52.21 | 60.16 | 60.07 | 67.61 | 70.53 | 84.32 | 86.84 | 75.40 | 64.13 | 47.80 | 43.77 | 63.35 | |||||||||||||
| 2006 | 48.74 | 50.50 | 52.71 | 62.27 | 69.71 | 75.07 | 85.35 | 83.65 | 78.33 | 64.06 | 51.73 | 47.00 | 64.09 | |||||||||||||
| 2007 | 43.84 | 50.50 | 59.45 | 61.67 | 68.68 | 75.20 | 84.16 | 82.58 | 75.57 | 60.23 | 50.17 | 45.32 | 63.11 | |||||||||||||
| 2008 | 40.94 | 50.24 | 52.81 | 57.67 | 67.84 | 69.10 | 82.52 | 81.74 | 76.50 | 61.10 | 53.70 | 45.71 | 61.65 | |||||||||||||
| 2009 | 46.52 | 51.82 | 52.03 | 60.17 | 70.06 | 73.33 | 85.26 | 82.23 | 77.47 | 61.87 | 53.77 | 42.10 | 63.05 | |||||||||||||
| 2010 | 52.26 | 54.61 | 56.32 | 58.83 | 62.87 | 68.80 | 81.00 | 80.39 | 73.27 | 63.77 | 52.30 | 48.58 | 62.75 | |||||||||||||
| 2011 | 49.94 | 48.96 | 54.58 | 55.77 | 61.35 | 69.30 | 76.10 | 79.74 | 80.23 | 62.39 | 51.93 | 44.58 | 61.24 | |||||||||||||
| 2012 | 50.03 | 50.69 | 52.90 | 61.13 | 66.65 | 68.90 | 77.58 | 83.32 | 77.57 | 64.97 | 55.60 | 46.97 | 63.03 | |||||||||||||
| 2013 | 43.13 | 50.07 | 60.83 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.60 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 47.29 | 51.93 | 56.15 | 61.37 | 67.72 | 73.76 | 81.63 | 81.90 | 76.10 | 64.91 | 53.55 | 47.53 | 63.66 | |||||||||||||
| S.D. | 3.77 | 3.37 | 3.37 | 3.40 | 3.04 | 3.10 | 3.12 | 2.84 | 3.55 | 2.99 | 2.82 | 2.80 | 1.42 | |||||||||||||
| SKEW | -0.99 | 0.12 | 0.51 | 0.02 | 0.17 | 0.32 | -0.21 | 0.13 | -0.06 | 0.08 | -0.09 | 0.03 | 0.42 | |||||||||||||
| MAX | 53.80 | 60.21 | 64.87 | 69.33 | 77.06 | 80.90 | 87.94 | 90.68 | 84.27 | 73.19 | 60.97 | 54.03 | 68.04 | |||||||||||||
| MIN | 36.26 | 44.18 | 48.65 | 54.23 | 60.45 | 68.00 | 74.52 | 74.65 | 67.17 | 57.55 | 46.30 | 39.71 | 60.57 | |||||||||||||
| NO YRS | 95 | 94 | 92 | 92 | 91 | 90 | 90 | 90 | 94 | 91 | 95 | 95 | 85 | |||||||||||||