| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.20 | 48.86 | j | 51.20 | ||
| 1930 | 31.26 | 52.00 | ----- | z | ----- | z | 64.45 | 71.87 | 77.97 | ----- | z | ----- | z | ----- | z | 52.63 | ----- | z | 58.36 | |||||||
| 1931 | ----- | z | 49.52 | a | 55.15 | d | 65.66 | a | 73.30 | d | 71.50 | 79.61 | 75.42 | ----- | z | ----- | z | ----- | z | ----- | z | 67.16 | ||||
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.63 | ----- | z | ----- | z | ----- | z | 70.63 | ||
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.80 | u | 82.32 | 73.83 | 64.84 | 50.50 | 48.68 | 64.03 | ||||||
| 1941 | 48.57 | a | 55.93 | 62.26 | 63.30 | 65.68 | 73.83 | 84.23 | 78.68 | 67.97 | 62.74 | 55.20 | 47.47 | a | 63.82 | |||||||||||
| 1942 | 42.74 | 49.39 | 55.10 | 61.47 | 64.13 | 69.40 | 79.97 | 81.13 | 78.10 | 66.16 | 51.87 | 48.13 | 62.30 | |||||||||||||
| 1943 | 41.03 | 53.93 | 53.58 | 64.17 | 63.90 | 69.73 | 77.16 | 75.00 | 79.90 | 63.45 | 55.90 | 47.23 | 62.08 | |||||||||||||
| 1944 | 48.74 | 49.62 | 55.26 | 58.80 | 66.52 | 70.60 | 78.77 | 79.48 | 78.30 | 70.48 | 53.77 | 46.84 | 63.10 | |||||||||||||
| 1945 | 49.58 | 50.50 | 52.65 | 57.38 | a | 68.39 | 72.17 | a | 82.39 | 82.16 | 73.00 | 66.55 | 49.93 | 46.84 | 62.63 | |||||||||||
| 1946 | 47.90 | 50.07 | 55.80 | a | 61.60 | 72.16 | 69.60 | 78.84 | 81.55 | 72.45 | a | 58.32 | 52.90 | 46.71 | 62.33 | |||||||||||
| 1947 | 42.52 | 55.39 | 62.20 | a | 62.67 | 72.47 | a | 71.33 | 76.87 | 77.81 | 77.07 | 58.90 | 52.90 | 48.26 | 63.20 | |||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.96 | d | 71.35 | 71.77 | 63.65 | 47.33 | 40.40 | a | 61.41 | |||||
| 1949 | 34.19 | 44.43 | 53.77 | 63.70 | 68.13 | 73.30 | 74.87 | 75.70 | d | 78.00 | i | 60.00 | 59.66 | a | 45.31 | b | 59.37 | |||||||||
| 1950 | 34.63 | a | 47.43 | 50.90 | 59.25 | b | 68.33 | a | 73.13 | 79.27 | a | 83.32 | 79.79 | a | 59.97 | a | 54.97 | a | 54.68 | 62.14 | ||||||
| 1951 | 45.94 | 52.43 | 51.17 | a | 66.43 | 69.42 | 75.93 | a | 80.00 | 80.13 | 79.27 | 61.90 | 55.13 | 43.26 | 63.42 | |||||||||||
| 1952 | 43.00 | 49.79 | 51.26 | 66.23 | 70.58 | 69.48 | c | 83.96 | d | 80.83 | b | 85.58 | d | 73.40 | a | 52.90 | 49.77 | 64.73 | ||||||||
| 1953 | 53.39 | 50.86 | 53.90 | 58.83 | 66.48 | 68.77 | 80.06 | 79.35 | 79.93 | 68.23 | 57.47 | 49.52 | 63.90 | |||||||||||||
| 1954 | 45.47 | a | 54.07 | 55.16 | 61.10 | a | 70.90 | ----- | z | ----- | z | 73.26 | 72.63 | 66.84 | 58.30 | 48.55 | 60.63 | |||||||||
| 1955 | 46.06 | 49.46 | 50.80 | a | 56.03 | 67.68 | f | 77.50 | n | 72.71 | 78.63 | a | 73.70 | 63.19 | 47.27 | 46.35 | 58.42 | |||||||||
| 1956 | 46.45 | 41.10 | 51.52 | 64.97 | 72.61 | 68.50 | 81.23 | a | 75.89 | m | 73.87 | 60.10 | 52.80 | 45.42 | 59.87 | |||||||||||
| 1957 | 37.94 | 49.61 | 54.97 | 61.87 | 69.10 | 72.70 | c | 77.96 | c | 75.87 | 81.31 | a | 63.69 | b | 54.43 | 48.65 | 62.34 | |||||||||
| 1958 | 49.77 | 56.36 | 55.97 | a | 59.48 | a | 75.94 | 74.20 | 84.16 | 85.35 | 75.34 | a | 70.58 | 55.76 | a | 51.72 | b | 66.22 | ||||||||
| 1959 | 47.50 | a | 48.61 | 55.44 | d | 61.70 | 65.26 | 71.43 | 81.37 | a | 79.78 | h | 69.00 | 64.07 | a | 52.97 | 47.54 | c | 60.44 | |||||||
| 1960 | 41.45 | 50.03 | 54.75 | c | 59.04 | b | 62.97 | 73.27 | 82.74 | 75.50 | a | 72.46 | b | 64.58 | 53.44 | c | 48.25 | c | 61.54 | |||||||
| 1961 | 52.06 | 52.42 | b | 53.65 | 57.34 | a | 64.81 | 76.37 | 80.10 | 84.33 | a | 71.47 | 62.81 | 51.14 | a | 46.03 | 62.71 | |||||||||
| 1962 | 44.32 | 51.71 | 52.52 | 62.30 | 59.39 | 71.67 | 77.61 | 75.94 | 75.57 | 64.35 | 55.47 | 49.45 | 61.69 | |||||||||||||
| 1963 | 40.84 | 57.18 | 54.82 | c | 56.63 | 67.87 | 68.60 | 71.97 | 76.03 | 76.33 | 64.27 | a | 54.07 | a | 47.32 | 61.33 | ||||||||||
| 1964 | 46.87 | 50.79 | 50.94 | 55.17 | 62.52 | 67.90 | 74.90 | 73.61 | 69.97 | 66.77 | 48.97 | 43.81 | 59.35 | |||||||||||||
| 1965 | 46.06 | 49.07 | 58.14 | c | 61.73 | 63.13 | 71.82 | b | 81.42 | 77.61 | c | 72.07 | 67.23 | 54.76 | a | 44.68 | 62.31 | |||||||||
| 1966 | 44.58 | 49.86 | 54.42 | 63.23 | 68.59 | b | 71.63 | 75.74 | 79.29 | 74.83 | 63.39 | 53.87 | 48.65 | 62.34 | ||||||||||||
| 1967 | 49.03 | 52.21 | 50.94 | 55.40 | 67.55 | 75.63 | 81.03 | a | 88.42 | 80.90 | 62.94 | 54.30 | 45.58 | 63.66 | ||||||||||||
| 1968 | 45.00 | a | 57.31 | 56.84 | 57.32 | b | 64.42 | 71.23 | 79.06 | 74.55 | 71.50 | 60.87 | 52.87 | 41.94 | 61.08 | |||||||||||
| 1969 | 36.48 | 46.96 | 57.84 | 58.90 | 69.57 | a | 73.63 | 76.03 | 75.37 | a | 71.93 | 61.16 | 53.60 | 48.57 | h | 61.95 | ||||||||||
| 1970 | 45.45 | 55.89 | 55.32 | 55.00 | 66.10 | 75.90 | 78.94 | 80.03 | 69.53 | 62.48 | 54.23 | 43.84 | 61.89 | |||||||||||||
| 1971 | 43.23 | 49.18 | 50.00 | c | 57.90 | 66.00 | a | 65.63 | 78.74 | 81.32 | 70.40 | 60.19 | 50.83 | 43.77 | 59.77 | |||||||||||
| 1972 | 43.00 | 48.59 | 56.55 | 56.47 | 70.94 | 72.30 | 82.17 | b | 77.37 | l | 71.76 | a | 64.27 | a | 53.40 | 40.43 | a | 59.99 | ||||||||
| 1973 | 44.00 | 52.61 | 53.57 | a | 61.37 | 69.10 | 71.38 | a | 80.94 | 75.23 | 75.43 | 61.68 | 48.53 | 48.48 | b | 61.86 | ||||||||||
| 1974 | 43.84 | 47.07 | 54.85 | e | 56.55 | a | 60.55 | 73.43 | 73.36 | i | 78.61 | 81.17 | a | 67.48 | ----- | z | 47.55 | 61.11 | ||||||||
| 1975 | ----- | z | ----- | z | 50.42 | 52.83 | 66.41 | d | ----- | z | 74.87 | 70.00 | b | 81.07 | b | 58.68 | 49.86 | a | 47.37 | a | 61.28 | |||||
| 1976 | 46.23 | a | 45.06 | l | 49.87 | 56.04 | c | 65.23 | 67.40 | ----- | z | ----- | z | 71.77 | 63.32 | 56.00 | a | 45.16 | 57.89 | |||||||
| 1977 | 44.29 | 53.46 | 50.00 | 63.27 | 60.06 | 72.87 | 75.26 | 82.23 | 67.93 | 62.19 | 49.63 | 47.00 | 60.68 | |||||||||||||
| 1978 | 45.06 | 51.57 | 58.23 | a | 59.17 | 63.06 | 74.83 | 77.52 | 73.77 | i | 66.80 | 65.71 | 47.23 | 42.03 | b | 59.20 | ||||||||||
| 1979 | 38.21 | b | 45.68 | i | 58.57 | a | 58.63 | 67.70 | a | 74.00 | 79.48 | 76.45 | 75.50 | 65.61 | 52.23 | 49.90 | 63.30 | |||||||||
| 1980 | 42.00 | 49.34 | 51.65 | 61.90 | 64.16 | 65.67 | 78.10 | a | 75.55 | 72.90 | 66.55 | 53.63 | 49.48 | 60.91 | ||||||||||||
| 1981 | 52.20 | a | 50.93 | 57.90 | 58.60 | 64.10 | 67.77 | 75.71 | 83.45 | 74.83 | 62.23 | 56.63 | 47.39 | 62.64 | ||||||||||||
| 1982 | 42.19 | 48.71 | 54.42 | 56.50 | 66.94 | 73.90 | 75.19 | 77.48 | 74.24 | m | ----- | z | ----- | z | 43.50 | u | 61.92 | |||||||||
| 1983 | 50.61 | 52.71 | 56.52 | 61.87 | 68.74 | 68.20 | 71.74 | 76.26 | 70.23 | 62.45 | 53.97 | 40.00 | 61.11 | |||||||||||||
| 1984 | 48.26 | 52.17 | 56.58 | 55.97 | 62.16 | 68.27 | 78.16 | 80.35 | 72.43 | 58.48 | 52.07 | 42.39 | 60.61 | |||||||||||||
| 1985 | 43.87 | 46.18 | 52.90 | 59.60 | 66.68 | 72.30 | 86.00 | 78.81 | 69.00 | 61.68 | 43.37 | 41.10 | 60.12 | |||||||||||||
| 1986 | 51.16 | 51.21 | 60.65 | 58.67 | 65.16 | 75.70 | 72.74 | 85.94 | 70.13 | 67.13 | 52.77 | 45.65 | 63.08 | |||||||||||||
| 1987 | 45.94 | 53.14 | 56.55 | 64.57 | 69.87 | 76.20 | 74.94 | 82.74 | 78.87 | 73.23 | 55.20 | 43.32 | 64.55 | |||||||||||||
| 1988 | 44.87 | 52.14 | 56.32 | 60.50 | 64.29 | 71.00 | 78.84 | 78.74 | 75.73 | 65.32 | 51.37 | 47.26 | 62.20 | |||||||||||||
| 1989 | 46.10 | 43.04 | 52.00 | 65.13 | 66.58 | 73.50 | 72.97 | 74.48 | 79.00 | 62.71 | 53.43 | 44.68 | 61.13 | |||||||||||||
| 1990 | 48.10 | 47.07 | 58.68 | 62.70 | 63.74 | 70.33 | 81.35 | 79.97 | 76.63 | 61.13 | 52.97 | 39.16 | 61.82 | |||||||||||||
| 1991 | 46.29 | 57.54 | 52.74 | 57.67 | 60.42 | 66.30 | 79.10 | 80.10 | 79.47 | 66.94 | 52.13 | 45.39 | 62.01 | |||||||||||||
| 1992 | 50.52 | 57.52 | 63.29 | 63.37 | 72.90 | 77.27 | 80.43 | a | 83.61 | 72.87 | 65.81 | 50.80 | 43.58 | 65.16 | ||||||||||||
| 1993 | 42.13 | 48.96 | 56.74 | 57.87 | 69.52 | 68.67 | 68.74 | 76.84 | 78.23 | 66.74 | 47.20 | 45.42 | 60.59 | |||||||||||||
| 1994 | 48.13 | 46.86 | 60.03 | 61.27 | 68.19 | 69.63 | 80.65 | 79.58 | 77.67 | 62.68 | 45.33 | 47.10 | 62.26 | |||||||||||||
| 1995 | 49.58 | 53.89 | 56.68 | 58.83 | 69.16 | 70.57 | 78.39 | 76.16 | 75.77 | 62.26 | 56.47 | 46.94 | 62.89 | |||||||||||||
| 1996 | 45.17 | a | 51.18 | a | 55.87 | 60.57 | 61.65 | 70.83 | 82.10 | 80.87 | 70.90 | 62.00 | 50.67 | 46.65 | 61.54 | |||||||||||
| 1997 | 45.71 | 51.75 | 53.84 | 59.30 | 71.87 | 70.50 | 78.00 | 81.55 | 76.33 | 60.26 | 57.80 | 45.65 | 62.71 | |||||||||||||
| 1998 | 48.55 | 52.75 | 56.90 | 61.57 | 61.48 | 70.77 | 79.16 | 82.16 | 78.83 | 61.87 | 52.30 | 44.74 | 62.59 | |||||||||||||
| 1999 | 46.68 | 48.82 | 52.68 | 60.63 | 63.32 | 68.53 | 76.32 | 77.94 | 79.57 | 65.74 | 55.30 | 48.84 | 62.03 | |||||||||||||
| 2000 | 45.23 | 50.86 | 52.94 | 63.57 | 65.55 | 74.40 | 76.81 | 78.94 | 73.60 | 62.71 | 49.97 | 46.19 | 61.73 | |||||||||||||
| 2001 | 47.45 | 51.29 | 55.87 | 57.17 | 72.58 | 71.73 | 76.10 | 79.03 | 75.87 | 61.74 | 53.23 | 45.48 | 62.30 | |||||||||||||
| 2002 | 43.74 | 51.61 | 51.26 | 60.20 | 63.87 | 73.43 | 80.00 | 80.29 | 77.33 | 63.87 | 55.20 | 49.13 | 62.49 | |||||||||||||
| 2003 | 51.90 | 52.07 | 54.45 | 58.13 | 67.45 | 75.43 | 82.23 | 81.29 | 76.87 | 64.10 | 49.30 | 46.71 | 63.33 | |||||||||||||
| 2004 | 40.81 | 51.52 | 59.26 | 67.27 | 65.19 | 74.33 | 81.87 | 80.13 | 70.83 | 63.42 | 51.10 | 47.45 | 62.76 | |||||||||||||
| 2005 | 47.94 | 53.89 | 59.45 | 59.07 | 67.26 | 67.63 | 79.13 | 81.90 | 72.40 | 61.90 | 50.52 | a | 44.16 | 62.10 | ||||||||||||
| 2006 | 48.68 | 49.14 | 52.13 | 61.90 | ----- | z | 73.80 | 80.10 | 79.10 | 75.80 | 62.77 | 50.83 | 45.65 | 61.81 | ||||||||||||
| 2007 | 43.77 | 49.39 | 56.74 | 58.20 | 66.06 | 70.30 | 79.06 | 76.77 | 71.03 | 59.42 | 51.63 | 43.48 | 60.49 | |||||||||||||
| 2008 | 42.16 | 50.52 | 50.74 | 54.83 | 64.61 | 68.50 | 77.87 | 77.55 | 74.87 | 61.70 | a | 53.67 | 41.55 | 59.88 | ||||||||||||
| 2009 | 43.32 | 49.82 | 49.74 | 58.67 | 68.45 | 71.90 | 83.55 | 77.83 | a | 75.37 | 60.23 | 52.10 | 42.23 | 61.10 | ||||||||||||
| 2010 | 50.55 | 55.43 | 57.10 | 57.97 | 61.39 | 66.70 | 76.45 | 77.61 | 70.07 | 62.97 | 49.30 | 46.87 | 61.03 | |||||||||||||
| 2011 | 45.48 | 45.29 | 50.58 | 53.70 | 60.42 | 67.69 | a | 73.58 | 78.06 | 77.27 | 60.35 | 49.63 | 43.81 | 58.82 | ||||||||||||
| 2012 | 45.87 | 49.00 | 49.52 | 59.43 | 65.16 | 67.57 | 75.19 | 80.71 | 76.50 | 62.39 | 52.47 | 44.68 | 60.71 | |||||||||||||
| 2013 | 39.84 | 48.50 | 56.12 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.15 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 45.16 | 50.85 | 54.77 | 59.95 | 66.52 | 71.38 | 78.37 | 78.89 | 74.71 | 63.61 | 52.50 | 45.98 | 62.09 | |||||||||||||
| S.D. | 4.28 | 3.28 | 3.23 | 3.21 | 3.62 | 2.85 | 3.36 | 3.39 | 3.90 | 3.14 | 2.99 | 2.86 | 1.40 | |||||||||||||
| SKEW | -0.78 | -0.17 | 0.41 | 0.15 | 0.22 | -0.04 | -0.31 | 0.07 | 0.23 | 0.93 | -0.39 | -0.08 | 0.34 | |||||||||||||
| MAX | 53.39 | 57.54 | 63.29 | 67.27 | 75.94 | 77.27 | 86.00 | 88.42 | 85.58 | 73.40 | 59.66 | 54.68 | 66.22 | |||||||||||||
| MIN | 31.26 | 41.10 | 49.52 | 52.83 | 59.39 | 65.63 | 68.74 | 70.00 | 66.80 | 58.32 | 43.37 | 39.16 | 58.82 | |||||||||||||
| NO YRS | 72 | 71 | 73 | 72 | 71 | 70 | 71 | 69 | 72 | 72 | 73 | 71 | 57 | |||||||||||||