| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.22 | h | 9999.00 | |
| 1951 | 36.77 | 46.57 | 51.00 | 69.50 | 74.45 | 82.47 | 96.67 | a | 89.42 | 84.37 | 62.84 | 50.63 | 36.29 | 65.08 | ||||||||||||
| 1952 | 34.00 | 41.76 | 47.23 | ----- | z | 74.90 | 80.20 | 91.00 | g | 92.30 | a | 86.27 | 78.81 | 49.88 | d | 44.35 | h | 65.04 | ||||||||
| 1953 | 52.93 | c | 53.15 | b | 60.52 | h | 65.93 | b | 68.37 | l | 73.82 | b | 93.32 | 89.52 | f | 85.44 | l | 72.26 | l | 65.00 | z | 43.25 | w | 67.83 | ||
| 1954 | 47.43 | a | 51.75 | d | 51.76 | n | 70.24 | a | 82.33 | d | 81.08 | f | 93.24 | b | 87.19 | 82.21 | a | 68.78 | d | 60.38 | d | 40.57 | c | 68.41 | ||
| 1955 | 39.70 | a | 44.65 | b | 55.07 | c | 58.19 | d | 73.03 | b | 86.63 | 88.59 | i | 97.96 | c | 84.63 | c | 74.78 | h | 55.04 | d | 46.90 | a | 64.18 | ||
| 1956 | 45.38 | e | 44.00 | b | 60.46 | g | 65.96 | b | 69.33 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.69 | e | 49.26 | |
| 1957 | 36.17 | a | 49.18 | 56.72 | b | ----- | z | ----- | z | ----- | z | ----- | z | 86.68 | c | 84.38 | f | 62.11 | v | 48.76 | a | 45.84 | l | 55.50 | ||
| 1958 | ----- | z | ----- | z | ----- | z | 60.27 | d | 82.00 | e | 79.68 | h | 89.11 | d | 92.95 | i | 79.70 | c | 75.20 | a | 62.00 | o | 50.68 | f | 77.26 | |
| 1959 | 44.14 | b | 45.93 | 55.17 | b | 68.23 | 67.26 | d | 83.57 | 93.84 | 86.84 | 81.53 | k | 67.77 | 56.83 | 39.10 | 64.43 | |||||||||
| 1960 | 33.03 | a | 43.64 | a | 57.97 | 64.73 | d | 69.42 | 85.04 | b | 95.71 | 87.14 | c | 83.57 | b | ----- | z | 51.43 | b | 41.75 | c | 64.86 | ||||
| 1961 | 44.43 | a | 52.37 | a | 57.22 | h | 62.79 | b | 73.57 | c | 88.21 | a | 93.32 | 93.86 | b | 73.41 | a | 66.55 | 51.48 | a | 42.41 | b | 67.49 | |||
| 1962 | ----- | z | 44.21 | d | 51.43 | c | ----- | z | 69.23 | a | 84.18 | b | 91.83 | a | 89.93 | b | 84.73 | 68.35 | 54.47 | 44.52 | 68.29 | |||||
| 1963 | 41.55 | 54.43 | 54.16 | 57.00 | 73.24 | b | 75.23 | 89.90 | 90.74 | 85.50 | 72.65 | 51.80 | 39.10 | a | 65.44 | |||||||||||
| 1964 | 40.52 | 46.17 | ----- | z | 60.40 | ----- | z | 76.14 | a | 93.94 | 88.19 | 77.73 | 73.55 | 50.13 | 43.90 | 65.07 | ||||||||||
| 1965 | 40.74 | 51.81 | a | 56.07 | a | 65.30 | 69.40 | a | 79.41 | a | 90.16 | 86.90 | 73.03 | 74.97 | 55.03 | a | 42.74 | 65.46 | ||||||||
| 1966 | 43.48 | 44.86 | 58.57 | a | 67.00 | 79.57 | c | 80.50 | 93.65 | 93.20 | f | ----- | z | 68.31 | e | 54.03 | 40.13 | 63.01 | ||||||||
| 1967 | 44.40 | a | 50.52 | a | 53.97 | 52.79 | b | 73.43 | a | 77.48 | a | 95.68 | 96.89 | c | ----- | z | 65.59 | b | 53.14 | a | 41.06 | 64.09 | ||||
| 1968 | 42.19 | 54.34 | ----- | z | 61.36 | b | 71.42 | 84.03 | 96.68 | 84.97 | 80.53 | ----- | z | 48.59 | a | 42.28 | b | 66.64 | ||||||||
| 1969 | 42.07 | b | 43.00 | 55.10 | b | 67.10 | a | 80.48 | 78.79 | a | 93.26 | 94.40 | a | 82.73 | 61.52 | 56.07 | 43.32 | c | 66.49 | |||||||
| 1970 | 44.52 | 54.59 | a | 54.70 | a | 56.97 | 73.68 | 84.73 | 95.77 | 97.87 | a | 76.68 | b | 63.68 | 51.70 | 39.16 | 66.17 | |||||||||
| 1971 | 45.23 | a | 49.18 | 50.03 | 60.68 | b | 72.26 | 78.15 | j | 92.27 | a | 96.32 | 75.72 | a | 63.10 | 51.11 | c | 39.13 | a | 63.19 | ||||||
| 1972 | 39.79 | c | 46.46 | e | 59.84 | 60.53 | 78.16 | 84.77 | 92.81 | 92.30 | a | 77.70 | 67.13 | a | 49.21 | a | 38.75 | c | 65.62 | |||||||
| 1973 | 38.48 | 48.75 | 52.10 | 63.31 | a | 79.10 | a | ----- | z | 96.35 | 91.87 | 81.21 | a | 69.53 | a | ----- | z | 46.10 | a | 66.68 | ||||||
| 1974 | 39.56 | f | 50.96 | 54.19 | 60.87 | 71.81 | 90.93 | a | 92.29 | 90.26 | 85.50 | 69.48 | 53.33 | 41.71 | 69.21 | |||||||||||
| 1975 | 40.16 | 46.76 | c | 51.11 | c | 53.83 | 70.61 | 79.53 | 94.16 | 86.81 | 83.74 | g | 63.90 | 51.66 | a | 45.43 | c | 62.18 | ||||||||
| 1976 | 43.32 | 48.10 | 50.13 | 62.14 | b | 77.97 | b | 80.03 | a | 92.26 | 81.74 | 80.77 | 69.73 | a | 60.97 | 45.16 | 66.03 | |||||||||
| 1977 | 31.26 | 50.85 | a | 52.74 | 71.47 | 65.67 | a | 88.72 | a | 90.61 | 88.97 | 79.57 | 69.77 | a | 53.23 | 46.06 | 65.74 | |||||||||
| 1978 | 42.00 | a | 48.29 | 61.47 | a | 60.50 | ----- | z | 80.83 | 90.55 | 88.45 | 76.07 | 73.97 | 50.80 | 39.19 | 64.74 | ||||||||||
| 1979 | 31.19 | 44.18 | 56.55 | 63.10 | a | 73.60 | a | 83.52 | a | 92.27 | a | 87.35 | 86.33 | 68.57 | a | 47.00 | 45.29 | 64.91 | ||||||||
| 1980 | 40.16 | 47.38 | 51.65 | 66.67 | 68.31 | b | 77.90 | 91.58 | 87.23 | 80.21 | a | 68.57 | a | 52.90 | a | 44.55 | 64.76 | |||||||||
| 1981 | 38.66 | b | 48.96 | 56.74 | d | 64.53 | 67.97 | 81.97 | a | 91.35 | 94.52 | 82.43 | 63.35 | 53.47 | 45.39 | 65.78 | ||||||||||
| 1982 | 37.68 | 44.86 | 52.39 | 59.57 | 70.97 | 79.40 | 86.45 | 91.29 | 77.00 | 63.65 | 42.57 | 40.58 | 62.20 | |||||||||||||
| 1983 | 43.06 | 49.93 | 53.61 | 59.47 | 71.84 | 79.07 | 87.81 | 89.87 | 80.50 | 69.16 | 50.77 | 36.59 | b | 64.31 | ||||||||||||
| 1984 | 29.97 | 39.31 | 53.90 | 58.37 | 72.52 | 76.77 | 93.03 | 91.81 | 77.50 | 60.45 | 48.90 | 35.94 | 61.54 | |||||||||||||
| 1985 | 36.65 | 40.32 | 49.23 | 67.47 | 74.87 | 85.73 | 96.61 | 88.84 | ----- | z | 65.52 | 41.47 | 26.83 | b | 61.23 | |||||||||||
| 1986 | 39.06 | 50.61 | 59.71 | 62.80 | 73.71 | 89.77 | 88.74 | 94.55 | 71.77 | 68.87 | 53.73 | 39.35 | 66.06 | |||||||||||||
| 1987 | 38.42 | 48.25 | 51.52 | j | 74.47 | 75.81 | 85.63 | 87.16 | 90.35 | 86.67 | 75.74 | 51.13 | 41.38 | b | 68.64 | |||||||||||
| 1988 | 37.65 | 53.55 | 58.61 | 67.97 | 75.03 | 86.67 | 96.48 | 92.81 | 81.23 | 78.58 | 49.33 | 36.94 | 67.90 | |||||||||||||
| 1989 | 37.61 | 36.86 | 56.94 | 71.87 | 72.03 | 85.70 | 96.62 | j | 87.81 | 82.63 | 66.55 | 54.43 | 42.16 | 63.14 | ||||||||||||
| 1990 | 45.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.13 | 34.06 | 44.15 | ||||
| 1991 | 41.55 | 52.71 | ----- | z | 60.57 | 66.10 | 76.63 | 93.13 | 92.32 | 83.23 | 69.71 | 49.10 | 41.29 | 66.03 | ||||||||||||
| 1992 | 42.55 | 54.41 | 62.97 | 70.53 | 83.10 | 84.47 | 89.32 | 91.32 | 80.13 | 70.00 | 44.33 | 37.32 | 67.54 | |||||||||||||
| 1993 | 31.35 | 34.93 | 52.77 | 60.73 | 76.13 | 76.47 | 81.29 | 84.13 | 81.37 | 66.39 | 47.00 | 42.84 | 61.28 | |||||||||||||
| 1994 | 45.84 | 44.32 | 62.32 | 66.30 | 75.32 | 85.17 | 94.26 | 92.58 | 83.73 | 65.97 | 43.03 | 34.87 | 66.14 | |||||||||||||
| 1995 | 43.55 | 55.36 | 53.84 | 60.63 | 68.97 | 76.80 | 88.77 | 88.42 | 81.63 | 67.35 | 58.33 | 40.68 | 65.36 | |||||||||||||
| 1996 | 41.65 | 46.52 | 57.74 | 64.93 | 68.45 | 81.77 | 98.57 | x | 91.68 | 77.87 | 65.97 | 53.67 | 43.58 | 63.07 | ||||||||||||
| 1997 | 42.00 | 48.11 | 61.06 | 60.87 | 77.29 | 78.33 | 88.03 | 90.29 | 81.03 | 65.97 | 55.20 | ----- | z | 68.02 | ||||||||||||
| 1998 | ----- | z | 46.93 | 55.32 | 61.13 | 65.55 | 76.10 | 93.19 | 93.61 | 83.93 | 63.87 | 50.87 | 36.29 | 66.07 | ||||||||||||
| 1999 | 42.58 | 46.64 | 54.29 | 59.83 | 70.13 | 80.63 | 90.74 | 88.39 | 80.93 | 72.16 | 57.97 | 41.35 | 65.47 | |||||||||||||
| 2000 | 42.97 | 49.90 | 56.03 | 69.97 | 73.03 | 85.27 | 90.45 | 91.52 | 77.87 | 64.77 | 42.27 | 36.42 | 65.04 | |||||||||||||
| 2001 | 34.06 | 41.41 | a | 57.55 | 60.17 | 77.48 | 84.33 | 89.71 | 94.29 | 83.80 | 69.87 | 52.93 | 38.84 | 65.37 | ||||||||||||
| 2002 | 39.81 | 47.82 | 53.81 | 64.77 | 73.45 | 83.97 | 96.39 | 87.29 | 81.27 | 65.23 | 53.77 | 44.61 | 66.01 | |||||||||||||
| 2003 | 46.29 | 47.07 | 59.03 | 59.43 | 72.71 | 85.60 | 97.94 | 92.29 | 83.77 | 72.87 | 49.10 | 42.19 | 67.36 | |||||||||||||
| 2004 | 34.84 | 44.21 | 65.16 | 68.33 | 72.06 | 83.50 | 93.87 | 90.13 | 80.07 | 65.32 | 46.97 | 43.29 | 65.65 | |||||||||||||
| 2005 | 39.13 | 48.36 | 57.94 | 62.57 | 70.16 | 78.37 | 96.00 | 93.42 | 80.27 | 68.33 | g | 47.73 | 36.55 | 64.59 | ||||||||||||
| 2006 | 43.74 | 47.00 | 50.55 | 62.27 | 76.97 | 87.03 | 98.35 | 90.29 | 82.97 | 67.42 | 52.93 | 42.08 | e | 66.80 | ||||||||||||
| 2007 | 41.24 | f | 50.86 | 64.16 | 65.63 | 78.68 | 85.87 | 99.06 | 93.13 | 79.30 | 63.23 | 52.63 | 37.48 | 70.00 | ||||||||||||
| 2008 | 36.74 | 48.28 | k | 53.90 | 61.30 | 73.68 | 84.13 | 94.77 | 92.35 | 82.87 | 68.13 | 54.77 | 41.97 | 67.69 | ||||||||||||
| 2009 | 42.42 | 47.64 | 54.55 | 64.07 | 76.10 | 78.30 | 92.35 | 90.47 | l | 86.13 | 60.10 | 52.50 | 36.58 | 62.79 | ||||||||||||
| 2010 | 43.48 | 48.04 | 55.42 | 61.07 | 65.58 | 79.67 | 92.35 | 89.26 | 83.70 | 68.87 | 49.03 | 40.45 | 64.74 | |||||||||||||
| 2011 | 39.30 | a | 45.89 | 52.71 | 57.17 | 65.52 | 75.11 | b | 91.24 | b | 93.71 | 87.63 | 67.93 | a | ----- | z | 44.13 | 65.49 | ||||||||
| 2012 | 45.81 | 49.76 | 58.70 | a | 67.97 | a | 74.45 | 82.33 | 96.45 | b | 95.03 | 86.60 | 69.74 | 54.30 | 41.65 | 68.57 | ||||||||||
| 2013 | 28.55 | 49.14 | 60.70 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.13 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.30 | 47.63 | 55.63 | 63.34 | 73.22 | 81.95 | 92.66 | 90.71 | 81.28 | 68.06 | 51.53 | 40.70 | 65.48 | |||||||||||||
| S.D. | 4.76 | 4.28 | 3.92 | 4.52 | 4.37 | 4.13 | 3.35 | 3.40 | 3.64 | 4.19 | 4.11 | 3.68 | 1.64 | |||||||||||||
| SKEW | -0.40 | -0.54 | 0.36 | 0.18 | 0.18 | -0.01 | -0.63 | -0.07 | -0.53 | 0.53 | -0.34 | -0.94 | -0.90 | |||||||||||||
| MAX | 52.93 | 55.36 | 65.16 | 74.47 | 83.10 | 90.93 | 99.06 | 97.96 | 87.63 | 78.81 | 60.97 | 46.90 | 68.57 | |||||||||||||
| MIN | 28.55 | 34.93 | 47.23 | 52.79 | 65.52 | 73.82 | 81.29 | 81.74 | 71.77 | 60.10 | 41.47 | 26.83 | 61.28 | |||||||||||||
| NO YRS | 58 | 60 | 53 | 58 | 56 | 55 | 55 | 56 | 53 | 54 | 57 | 57 | 29 | |||||||||||||