| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 98.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | 2.75 | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.26 | 44.40 | 39.26 | 49.64 | ||||
| 1946 | 40.47 | a | 42.07 | 46.52 | 59.37 | 66.68 | 67.67 | 80.13 | 81.19 | 70.73 | 52.81 | 43.37 | 43.77 | 57.90 | ||||||||||||
| 1947 | 39.77 | 48.29 | 54.06 | 59.63 | 72.10 | 67.53 | 78.97 | 77.93 | a | 75.00 | 60.84 | 45.43 | 42.00 | 60.13 | ||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.66 | b | 77.00 | a | 68.87 | 60.17 | b | 45.52 | a | 32.94 | 60.02 | |||
| 1949 | 28.19 | 38.93 | a | 46.00 | 63.50 | 68.84 | 74.83 | 80.87 | 79.97 | b | 73.97 | 59.07 | a | 57.57 | 38.90 | 59.22 | ||||||||||
| 1950 | 28.50 | a | 43.61 | 46.00 | b | 54.04 | c | 64.68 | 70.83 | 84.39 | 86.68 | 73.14 | a | 58.39 | 49.25 | b | 47.90 | b | 58.95 | |||||||
| 1951 | 36.77 | 42.07 | 45.84 | 60.46 | b | 63.93 | a | 73.96 | b | 84.16 | 79.62 | b | 76.04 | c | 55.69 | b | 47.36 | e | 36.38 | e | 58.52 | |||||
| 1952 | 37.41 | b | 45.50 | g | 45.39 | 63.31 | a | 64.24 | b | 68.62 | a | 84.54 | c | 80.29 | 77.14 | a | 69.52 | 45.31 | a | 39.17 | a | 61.36 | ||||
| 1953 | 47.13 | 44.43 | 49.69 | b | 53.07 | 57.47 | a | 63.32 | b | 81.47 | a | 76.55 | b | 76.68 | b | 62.19 | 52.20 | 44.80 | a | 59.08 | ||||||
| 1954 | 38.87 | a | 50.82 | 45.81 | 57.80 | 68.00 | 67.53 | 81.06 | 70.94 | 68.77 | 59.65 | 54.50 | 41.81 | 58.80 | ||||||||||||
| 1955 | 38.90 | 41.11 | 43.90 | 46.77 | 59.74 | 72.97 | 76.35 | 83.13 | a | 71.90 | a | 61.03 | 43.80 | 38.97 | 56.55 | |||||||||||
| 1956 | 39.68 | 37.79 | 47.30 | a | 60.85 | c | 66.13 | a | 68.67 | 82.32 | 78.13 | 74.10 | 56.87 | 49.00 | 47.32 | 59.01 | ||||||||||
| 1957 | 30.23 | 43.68 | 47.10 | 56.40 | 64.39 | 73.37 | 77.71 | 75.87 | 75.30 | 53.35 | 46.30 | 45.87 | 57.46 | |||||||||||||
| 1958 | 42.68 | 48.89 | 45.77 | 54.50 | 72.61 | 71.77 | 83.55 | 84.90 | 69.80 | 65.71 | 50.27 | 49.19 | 61.64 | |||||||||||||
| 1959 | 42.77 | 40.96 | 51.77 | 58.53 | 60.29 | 72.00 | 82.97 | 77.71 | 66.37 | 62.74 | 53.27 | 43.61 | 59.42 | |||||||||||||
| 1960 | 36.61 | 40.52 | 50.90 | 56.23 | 60.19 | 76.23 | 88.13 | 80.39 | 77.93 | 64.13 | 47.97 | 44.58 | 60.32 | |||||||||||||
| 1961 | 45.84 | 50.93 | 50.19 | 57.23 | 62.23 | a | 81.07 | 85.97 | 86.97 | 70.53 | 62.06 | 48.90 | 40.39 | c | 61.86 | |||||||||||
| 1962 | 41.27 | a | 44.75 | 46.35 | 64.25 | b | 56.68 | 69.70 | 78.60 | a | 73.97 | a | 74.07 | 60.34 | b | 52.37 | c | 47.72 | f | 60.21 | ||||||
| 1963 | 41.00 | d | 52.48 | e | 50.85 | d | 51.23 | d | 64.57 | c | 71.44 | c | 77.50 | e | 81.70 | a | 79.79 | b | 62.39 | 48.53 | 44.26 | 60.48 | ||||
| 1964 | 40.23 | a | 47.21 | a | 47.89 | d | 54.17 | a | 62.29 | c | ----- | z | 80.93 | b | 77.37 | d | 71.48 | a | 64.63 | a | 44.32 | b | 37.60 | f | 59.05 | |
| 1965 | 40.18 | c | 47.56 | a | ----- | z | 57.11 | b | 63.58 | 72.43 | 81.48 | b | 78.17 | b | 68.04 | b | 68.93 | b | 49.83 | a | 40.48 | 60.71 | ||||
| 1966 | 41.23 | a | 43.00 | 52.20 | a | 59.88 | d | 67.77 | 70.34 | a | 78.33 | j | 79.21 | b | 73.56 | c | 65.67 | a | 50.04 | d | 41.97 | a | 58.62 | |||
| 1967 | 42.59 | b | 49.52 | a | 45.63 | a | 48.26 | c | 64.94 | 74.97 | 85.66 | b | 89.47 | a | 79.33 | 63.35 | 48.63 | 39.16 | 60.96 | |||||||
| 1968 | 41.74 | 45.66 | 54.55 | 54.93 | 64.03 | a | 73.57 | b | 85.48 | 75.63 | a | 73.43 | b | 59.90 | a | 46.66 | a | 37.78 | d | 59.45 | ||||||
| 1969 | 33.16 | 38.36 | 49.42 | 56.62 | a | 68.20 | a | 73.43 | 81.04 | c | 80.83 | a | 72.36 | b | 56.42 | 52.83 | 43.10 | a | 58.81 | |||||||
| 1970 | 41.32 | 46.38 | b | 48.41 | d | 49.30 | 65.42 | 78.46 | b | 84.58 | 85.10 | b | 67.50 | 59.03 | a | 46.45 | a | 38.55 | 59.21 | |||||||
| 1971 | 42.84 | 44.59 | a | 45.57 | a | 54.90 | a | 62.97 | a | 68.37 | 84.97 | 86.39 | 67.97 | a | 57.10 | a | 48.62 | a | 37.17 | a | 58.45 | |||||
| 1972 | 40.48 | 45.72 | 53.32 | 53.79 | a | 66.19 | 74.10 | 82.90 | b | 83.17 | a | 70.50 | 59.68 | 47.57 | b | 36.43 | c | 59.49 | ||||||||
| 1973 | 37.80 | a | 44.93 | a | 49.10 | a | 57.50 | 68.61 | 74.81 | d | 86.14 | b | 81.73 | a | 71.92 | d | 60.46 | c | 43.28 | a | 42.94 | 59.93 | ||||
| 1974 | 35.32 | 44.65 | b | 47.97 | b | 53.26 | c | 59.67 | a | 80.36 | e | 78.52 | b | 81.68 | 79.20 | 65.19 | 50.21 | b | 43.16 | 59.93 | ||||||
| 1975 | 41.27 | a | 40.82 | 43.89 | c | 48.53 | 62.61 | c | 68.68 | e | 83.10 | b | 75.66 | b | 76.48 | a | 58.28 | b | 47.39 | b | 43.97 | b | 57.56 | |||
| 1976 | 45.47 | a | 43.59 | 47.03 | 53.45 | a | 65.54 | c | 68.00 | c | 82.46 | c | 73.76 | b | 75.69 | a | 65.67 | g | 52.50 | d | 47.20 | a | 59.52 | |||
| 1977 | 41.22 | d | 48.43 | 48.88 | g | 64.50 | b | 57.96 | d | 77.56 | c | 80.64 | c | 85.89 | c | 65.73 | d | 60.76 | b | 46.79 | b | 42.60 | a | 61.10 | ||
| 1978 | ----- | z | ----- | z | ----- | z | 53.15 | d | 60.87 | a | 74.07 | b | 81.59 | d | 77.22 | d | 65.96 | e | 66.30 | d | ----- | z | ----- | z | 68.45 | |
| 1979 | 28.00 | c | 43.75 | d | 51.93 | a | 53.08 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.03 | a | 41.85 | c | 47.40 | a | 47.01 | |
| 1980 | 36.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.76 | f | 48.80 | 49.10 | 44.95 | ||||
| 1981 | 40.03 | b | 45.22 | a | 50.13 | a | 54.74 | g | 60.74 | l | 62.97 | a | 74.81 | d | ----- | z | 67.35 | g | ----- | z | ----- | z | ----- | z | 54.63 | |
| 1982 | 33.09 | i | 39.12 | b | 46.23 | 50.95 | i | 59.16 | 68.73 | 74.65 | 79.60 | a | 64.05 | i | 50.90 | k | 39.10 | a | 37.03 | a | 55.45 | |||||
| 1983 | 42.19 | 40.21 | 44.89 | l | 47.50 | 60.63 | d | 67.33 | 77.97 | a | 84.39 | 68.92 | r | 54.43 | q | 45.13 | 32.06 | 55.27 | ||||||||
| 1984 | 43.61 | 46.97 | 51.84 | 52.73 | 62.94 | 67.87 | 85.35 | 83.18 | c | 70.55 | a | 55.80 | a | 44.52 | e | 34.61 | 58.33 | |||||||||
| 1985 | 36.14 | i | 42.75 | 48.10 | b | ----- | z | 60.72 | b | 76.50 | 91.20 | a | 89.61 | 66.67 | c | 60.83 | b | 35.40 | 35.10 | 60.69 | ||||||
| 1986 | 45.71 | n | 45.07 | 56.67 | g | 56.10 | 66.69 | b | 80.47 | 77.13 | a | 90.67 | a | 68.16 | e | 64.32 | 49.13 | 40.23 | 63.80 | |||||||
| 1987 | ----- | z | 46.96 | 49.23 | 66.82 | b | 71.77 | e | 81.04 | c | 77.10 | 82.58 | 80.47 | 71.97 | 49.07 | a | 40.00 | 65.18 | ||||||||
| 1988 | 37.87 | a | 52.76 | 53.71 | 59.40 | 65.39 | 72.76 | a | 84.81 | 84.61 | 76.27 | d | 73.84 | 45.30 | 42.43 | a | 62.43 | |||||||||
| 1989 | 43.42 | 34.71 | 49.77 | a | 62.80 | 63.97 | 76.00 | a | 80.84 | 78.26 | 73.25 | b | 63.16 | 52.93 | 49.26 | 60.70 | ||||||||||
| 1990 | 43.58 | 44.04 | 55.29 | ----- | z | 61.32 | 74.23 | 86.81 | 80.52 | 79.93 | 62.45 | 50.47 | 35.48 | 61.28 | ||||||||||||
| 1991 | 42.55 | ----- | z | ----- | z | ----- | z | 59.57 | a | 67.40 | 84.35 | 88.74 | 81.23 | 65.68 | 49.70 | ----- | z | 67.40 | ||||||||
| 1992 | 49.35 | 51.21 | 51.83 | b | 60.13 | ----- | z | 80.30 | ----- | z | 84.96 | c | ----- | z | 66.45 | 48.47 | 37.87 | 58.95 | ||||||||
| 1993 | 30.61 | 37.96 | 50.32 | 56.40 | 72.68 | i | 72.38 | a | 71.84 | 80.29 | n | 78.67 | l | 67.35 | 47.80 | 44.03 | 53.19 | |||||||||
| 1994 | 50.65 | 45.57 | 56.13 | 61.27 | 67.03 | 74.43 | 90.19 | 84.23 | 80.23 | 59.42 | 41.67 | 42.42 | 62.77 | |||||||||||||
| 1995 | 40.52 | 54.26 | a | 50.19 | 55.80 | 68.00 | 70.37 | 79.81 | 78.87 | 76.77 | 60.23 | 52.27 | 39.77 | 60.57 | ||||||||||||
| 1996 | 40.87 | 43.03 | 50.81 | 58.57 | 59.42 | ----- | z | 86.26 | 84.94 | 71.63 | 59.77 | 50.60 | 42.23 | 58.92 | ||||||||||||
| 1997 | 41.19 | 42.82 | 52.87 | 55.07 | 70.73 | a | 70.10 | 81.19 | 83.35 | 73.17 | 58.90 | 48.83 | 41.68 | 59.99 | ||||||||||||
| 1998 | 43.10 | 44.29 | 51.03 | 55.57 | 58.87 | 71.63 | 84.68 | 84.06 | 77.17 | 59.58 | 46.43 | 39.87 | 59.69 | |||||||||||||
| 1999 | 44.77 | 42.32 | 47.74 | 55.29 | b | 62.35 | 71.10 | 82.19 | 81.77 | 74.90 | 66.83 | b | 54.97 | 42.39 | 60.55 | |||||||||||
| 2000 | 37.52 | 43.34 | 50.23 | 63.37 | 64.97 | 76.57 | 82.29 | 82.35 | 72.83 | 58.65 | 41.20 | 40.48 | 59.48 | |||||||||||||
| 2001 | 40.52 | 42.61 | 52.77 | 55.47 | 72.61 | ----- | z | 80.52 | 84.58 | 78.63 | 63.23 | 52.07 | 38.16 | 60.11 | ||||||||||||
| 2002 | 40.87 | ----- | z | 48.06 | 59.33 | 64.81 | 77.13 | 86.94 | 80.16 | ----- | z | 59.19 | 51.77 | 40.71 | 60.90 | |||||||||||
| 2003 | 45.52 | 44.68 | 53.19 | 53.77 | 63.81 | e | ----- | z | 88.45 | 83.87 | 78.03 | 65.39 | 43.03 | 40.74 | 60.04 | |||||||||||
| 2004 | 39.10 | 43.83 | 57.97 | 61.17 | 62.74 | 72.80 | e | 85.74 | 84.03 | 70.47 | 61.06 | ----- | z | 44.55 | 62.13 | |||||||||||
| 2005 | 41.94 | 46.29 | 54.16 | 55.37 | 64.19 | 69.07 | 85.35 | 85.00 | 71.77 | 62.97 | ----- | z | 37.58 | 61.24 | ||||||||||||
| 2006 | 42.39 | 42.68 | 45.61 | ----- | z | 67.32 | 74.57 | ----- | z | 81.52 | 75.32 | e | 61.35 | 47.33 | 43.77 | 58.19 | ||||||||||
| 2007 | ----- | z | 45.89 | 56.03 | 58.20 | 68.90 | 74.59 | a | 87.23 | 81.00 | 72.63 | 59.54 | e | 49.00 | 39.10 | 62.92 | ||||||||||
| 2008 | ----- | z | 46.34 | ----- | z | ----- | z | 64.68 | 72.37 | 84.45 | 81.93 | d | 76.34 | a | 62.23 | a | 53.23 | 37.45 | 64.34 | |||||||
| 2009 | 43.00 | 44.11 | 44.65 | 56.97 | 67.52 | 72.10 | 86.97 | 84.23 | ----- | z | ----- | z | ----- | z | ----- | z | 62.44 | |||||||||
| 2010 | 44.45 | b | 45.89 | a | 51.90 | a | 54.62 | d | 59.03 | 67.90 | 83.32 | 80.42 | 72.60 | 61.84 | 45.50 | 39.52 | 58.92 | |||||||||
| 2011 | 44.83 | a | 42.32 | 47.77 | a | 51.90 | 58.78 | d | 69.59 | c | 78.45 | b | 84.16 | 82.07 | 61.45 | 47.41 | a | 45.23 | 59.50 | |||||||
| 2012 | 44.29 | 43.10 | 47.90 | 55.70 | 64.40 | a | 65.93 | 80.52 | 83.81 | 76.14 | b | 59.48 | 47.90 | 38.35 | 58.96 | |||||||||||
| 2013 | 40.55 | 44.32 | 51.03 | 66.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.30 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.42 | 44.52 | 49.61 | 56.53 | 64.19 | 72.31 | 82.34 | 81.68 | 73.73 | 61.84 | 47.96 | 41.20 | 59.58 | |||||||||||||
| S.D. | 4.63 | 3.79 | 3.36 | 4.37 | 3.90 | 4.21 | 3.95 | 4.04 | 4.19 | 4.02 | 3.97 | 3.93 | 1.34 | |||||||||||||
| SKEW | -0.89 | 0.23 | 0.33 | 0.02 | 0.23 | 0.18 | -0.26 | -0.17 | -0.03 | 0.49 | -0.39 | 0.07 | 0.30 | |||||||||||||
| MAX | 50.65 | 54.26 | 57.97 | 66.82 | 72.61 | 81.07 | 91.20 | 90.67 | 82.07 | 73.84 | 57.57 | 49.26 | 62.77 | |||||||||||||
| MIN | 28.00 | 34.71 | 43.89 | 46.77 | 56.68 | 62.97 | 71.84 | 70.94 | 65.73 | 52.81 | 35.40 | 32.06 | 56.55 | |||||||||||||
| NO YRS | 60 | 62 | 59 | 58 | 61 | 60 | 62 | 63 | 58 | 62 | 63 | 62 | 36 | |||||||||||||