| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.17 | g | 59.03 | 44.61 | 51.82 | |||
| 1960 | 38.14 | b | 43.18 | g | 52.74 | h | 53.80 | e | 60.19 | 80.72 | a | 88.34 | b | 82.35 | 79.47 | 63.87 | 45.23 | 41.48 | f | 65.79 | ||||||
| 1961 | 48.26 | 44.36 | f | 46.70 | a | 56.30 | 61.34 | b | 79.03 | 85.06 | 84.39 | 70.57 | b | 61.87 | 47.72 | a | 38.52 | 61.80 | ||||||||
| 1962 | 37.61 | 40.52 | a | 44.26 | 61.67 | 58.68 | 74.03 | a | 82.61 | 79.74 | 77.90 | 61.84 | 51.00 | 45.43 | a | 59.61 | ||||||||||
| 1963 | 43.67 | a | 51.46 | 45.97 | a | 46.80 | 65.52 | 69.53 | 76.48 | 79.45 | 77.27 | 62.00 | 47.03 | 44.16 | 59.11 | |||||||||||
| 1964 | ----- | z | ----- | z | 43.97 | 53.62 | a | 59.77 | 66.47 | 80.04 | c | 80.33 | a | 72.73 | 68.87 | 45.34 | a | 39.74 | 61.09 | |||||||
| 1965 | 39.58 | 45.12 | b | 52.30 | a | 53.60 | 61.97 | 70.33 | 80.97 | 76.06 | 70.53 | 70.52 | 48.97 | 39.26 | 59.10 | |||||||||||
| 1966 | 39.74 | 39.86 | 49.52 | 63.07 | 72.16 | 71.21 | a | 80.63 | a | 83.93 | b | 76.17 | a | 65.58 | 47.13 | 41.55 | 60.88 | |||||||||
| 1967 | 40.43 | a | 48.61 | 45.48 | 43.97 | 66.19 | 72.40 | 86.39 | 88.77 | 80.33 | 63.30 | a | 53.17 | a | 37.55 | 60.55 | ||||||||||
| 1968 | 40.29 | 48.86 | 53.26 | 57.23 | 64.19 | 75.27 | 87.23 | 74.84 | 75.60 | 61.77 | 47.00 | 36.65 | 60.18 | |||||||||||||
| 1969 | 36.58 | 38.18 | 47.74 | 55.60 | 69.52 | 71.80 | 83.35 | 84.13 | 77.30 | 56.00 | 53.33 | 42.61 | 59.68 | |||||||||||||
| 1970 | 40.39 | 48.79 | 48.48 | 50.83 | 67.52 | 75.59 | a | 86.06 | 86.48 | 72.48 | a | 62.28 | b | 49.00 | 36.20 | a | 60.34 | |||||||||
| 1971 | 41.68 | 45.86 | 44.90 | 54.43 | 62.61 | 68.17 | 83.87 | 87.90 | 73.13 | 57.45 | 48.10 | 34.94 | 58.59 | |||||||||||||
| 1972 | 36.68 | 44.90 | 56.58 | 53.07 | 67.87 | 77.47 | 86.87 | 84.06 | 70.63 | 61.16 | 43.90 | 36.19 | 59.95 | |||||||||||||
| 1973 | 37.90 | 43.07 | 46.06 | 59.87 | 71.94 | 77.37 | 85.57 | c | 84.03 | 74.68 | b | 61.29 | c | ----- | z | ----- | z | 64.18 | ||||||||
| 1974 | 35.97 | 42.54 | 45.84 | 53.03 | ----- | z | ----- | z | 81.39 | 83.29 | 82.10 | 66.78 | d | 49.89 | b | 40.67 | a | 58.15 | ||||||||
| 1975 | 39.82 | c | 39.35 | b | 42.55 | b | 45.00 | e | 66.25 | c | 73.69 | d | 82.87 | 78.52 | 80.43 | 57.19 | 44.80 | 43.03 | a | 57.79 | ||||||
| 1976 | 42.84 | 44.93 | 44.93 | a | 52.97 | a | 69.13 | 69.83 | a | 82.29 | 73.23 | 75.76 | a | 67.00 | b | 57.47 | 45.77 | 60.51 | ||||||||
| 1977 | 36.42 | 48.61 | 42.65 | 60.90 | 53.58 | 78.07 | ----- | z | 84.40 | a | 71.57 | 62.97 | a | 48.13 | 43.23 | 57.32 | ||||||||||
| 1978 | 42.32 | 45.29 | 54.39 | 50.40 | ----- | z | ----- | z | ----- | z | ----- | z | 68.18 | h | ----- | z | ----- | z | ----- | z | 48.10 | |||||
| 1979 | ----- | z | ----- | z | 51.16 | 54.27 | ----- | z | ----- | z | ----- | z | ----- | z | 77.82 | b | ----- | z | 46.57 | 44.23 | a | 54.81 | ||||
| 1980 | ----- | z | 47.46 | e | 46.55 | 56.78 | c | 62.81 | 67.46 | d | 82.39 | c | 81.84 | l | 74.96 | d | 66.21 | b | 50.95 | h | 44.89 | c | 61.06 | |||
| 1981 | 44.50 | c | 45.37 | a | 49.28 | f | 58.29 | f | 62.97 | a | 73.97 | 83.13 | 87.19 | 76.93 | 57.48 | 48.25 | b | 42.79 | b | 62.26 | ||||||
| 1982 | 36.10 | 41.89 | 44.55 | 51.17 | 65.74 | 71.23 | 79.81 | ----- | z | 69.63 | 59.00 | k | 46.05 | j | 38.10 | 55.36 | ||||||||||
| 1983 | 43.10 | 44.29 | 47.00 | 50.57 | i | 66.19 | 74.20 | j | 80.04 | f | 81.90 | a | 76.39 | g | 66.96 | d | 44.27 | 37.77 | 53.93 | |||||||
| 1984 | 42.55 | 45.41 | 52.52 | 56.50 | 69.30 | a | 72.90 | 86.22 | h | 85.45 | 74.48 | a | 55.74 | 43.17 | 37.47 | a | 57.77 | |||||||||
| 1985 | 39.87 | 42.89 | 46.45 | 64.00 | 64.90 | 79.67 | 87.74 | 82.03 | 67.33 | 60.26 | 40.83 | 41.74 | 59.81 | |||||||||||||
| 1986 | 48.48 | 47.43 | 55.71 | 56.83 | 65.13 | 80.37 | 81.65 | 90.10 | 67.00 | ----- | z | 50.73 | 41.84 | 62.30 | ||||||||||||
| 1987 | 38.55 | 47.43 | 48.90 | 65.03 | 70.16 | ----- | z | 76.29 | 84.42 | 79.10 | 72.77 | 48.90 | 37.10 | 60.79 | ||||||||||||
| 1988 | 38.42 | 49.69 | 52.61 | 57.93 | 61.87 | 75.27 | 88.42 | 87.81 | 78.97 | ----- | z | 45.83 | 40.65 | 61.59 | ||||||||||||
| 1989 | 37.10 | 36.14 | 48.84 | 61.37 | 61.03 | 76.17 | 82.55 | 78.71 | 74.77 | 58.97 | 53.33 | 47.61 | 59.72 | |||||||||||||
| 1990 | 42.61 | 42.54 | 51.81 | 63.53 | 61.55 | 71.77 | 83.45 | 81.68 | 78.23 | 66.06 | 48.47 | 35.65 | 60.61 | |||||||||||||
| 1991 | 44.94 | 54.00 | 43.35 | 53.67 | 59.06 | m | 69.03 | 85.48 | 85.03 | 82.50 | 68.81 | 51.67 | 41.29 | 61.80 | ||||||||||||
| 1992 | 43.42 | 50.55 | 55.10 | 61.10 | 76.13 | 77.30 | 81.39 | 87.94 | 77.60 | 67.65 | 48.23 | 35.29 | 63.47 | |||||||||||||
| 1993 | 33.87 | 37.93 | 51.81 | 53.00 | 65.45 | 70.00 | 76.68 | 78.97 | 77.20 | 66.68 | l | 47.60 | 40.13 | 57.51 | ||||||||||||
| 1994 | 45.16 | 41.82 | 55.45 | 58.43 | 66.16 | 74.67 | 88.81 | 85.00 | 78.13 | 61.52 | 38.77 | 38.58 | 61.04 | |||||||||||||
| 1995 | 40.97 | 55.36 | 46.35 | 53.67 | 63.68 | 69.87 | 79.90 | 81.90 | 79.17 | 65.45 | 57.43 | 43.13 | 61.41 | |||||||||||||
| 1996 | 42.71 | 45.41 | 53.77 | 57.30 | 63.81 | 75.27 | 87.45 | 87.06 | 73.80 | 64.48 | 51.80 | 41.84 | 62.06 | |||||||||||||
| 1997 | 41.74 | 44.86 | 54.65 | 55.20 | 72.00 | 72.40 | 82.55 | 83.71 | 75.37 | 61.16 | 47.90 | 34.00 | 60.46 | |||||||||||||
| 1998 | 42.90 | 40.82 | 50.10 | 54.83 | 55.77 | 71.63 | 86.26 | 87.55 | 79.60 | 64.42 | 47.63 | 38.39 | 59.99 | |||||||||||||
| 1999 | 43.90 | 40.64 | 47.90 | 53.47 | 65.61 | 74.13 | 84.32 | 82.45 | 79.73 | 71.00 | 58.10 | 45.00 | 62.19 | |||||||||||||
| 2000 | 42.00 | 46.07 | 50.94 | 61.43 | 66.39 | 80.00 | 82.87 | 87.06 | 73.53 | 63.29 | 45.30 | 44.87 | 61.98 | |||||||||||||
| 2001 | 43.74 | 42.82 | 54.52 | 54.63 | 75.87 | 77.03 | 85.06 | 88.39 | 79.43 | 69.13 | 49.93 | 39.58 | 63.35 | |||||||||||||
| 2002 | 40.84 | 49.14 | 50.10 | 60.70 | 65.42 | 78.60 | 90.23 | 84.19 | 79.77 | 65.06 | 54.17 | 44.26 | 63.54 | |||||||||||||
| 2003 | 48.32 | 46.50 | 52.74 | 49.53 | 65.39 | 81.90 | 88.97 | 83.87 | 81.70 | 70.58 | 45.17 | 41.29 | 63.00 | |||||||||||||
| 2004 | 42.06 | 42.90 | 59.61 | 60.73 | 65.65 | 77.80 | 86.58 | 83.81 | 75.70 | 61.16 | 47.67 | 44.06 | 62.31 | |||||||||||||
| 2005 | 42.13 | 47.50 | 54.06 | 55.03 | 63.06 | 68.50 | 90.00 | 88.03 | 74.67 | 62.97 | 47.33 | 42.29 | 61.30 | |||||||||||||
| 2006 | 42.06 | 45.64 | 41.81 | 54.33 | 69.32 | 79.53 | 90.03 | 84.26 | 78.67 | 64.03 | 48.47 | 42.45 | 61.72 | |||||||||||||
| 2007 | 41.00 | 45.86 | 56.93 | c | 59.93 | 71.48 | 77.53 | 88.26 | 86.77 | 74.87 | ----- | z | 52.90 | 37.61 | 63.01 | |||||||||||
| 2008 | 36.19 | 44.24 | 50.23 | 55.37 | 66.06 | 75.93 | 86.68 | 86.29 | 80.10 | 67.16 | 49.36 | s | 42.06 | 62.76 | ||||||||||||
| 2009 | 44.22 | h | 45.54 | 48.42 | e | 59.82 | h | 68.52 | h | 74.38 | i | 90.29 | n | 89.31 | r | 81.97 | 56.93 | p | 49.40 | 38.90 | 52.85 | |||||
| 2010 | 43.26 | l | 45.68 | 50.70 | k | 49.97 | 57.58 | 72.63 | 82.82 | t | 82.04 | c | 76.57 | 64.81 | 46.07 | p | 41.68 | 61.37 | ||||||||
| 2011 | 44.39 | 42.61 | 43.94 | 51.54 | b | 58.94 | 70.47 | 81.61 | 85.74 | 81.93 | 64.68 | 48.40 | 44.36 | q | 61.29 | |||||||||||
| 2012 | 45.43 | c | 45.93 | 45.88 | n | 55.18 | m | 68.41 | n | 74.67 | i | 86.30 | k | 89.55 | k | 83.45 | s | 65.25 | o | 51.37 | 40.56 | f | 47.58 | |||
| 2013 | 41.83 | h | 43.50 | v | 57.38 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.20 | 45.07 | 49.46 | 55.66 | 65.19 | 74.22 | 84.19 | 83.73 | 76.40 | 63.94 | 48.87 | 40.75 | 60.84 | |||||||||||||
| S.D. | 3.39 | 3.91 | 4.44 | 4.76 | 4.75 | 4.00 | 3.62 | 3.71 | 3.81 | 4.08 | 4.18 | 3.30 | 1.48 | |||||||||||||
| SKEW | 0.07 | 0.18 | 0.20 | -0.16 | 0.05 | 0.02 | -0.27 | -0.81 | -0.54 | -0.01 | 0.40 | -0.14 | 0.17 | |||||||||||||
| MAX | 48.48 | 55.36 | 59.61 | 65.03 | 76.13 | 81.90 | 90.23 | 90.10 | 82.50 | 72.77 | 59.03 | 47.61 | 63.54 | |||||||||||||
| MIN | 33.87 | 36.14 | 41.81 | 43.97 | 53.58 | 66.47 | 76.29 | 73.23 | 67.00 | 55.74 | 38.77 | 34.00 | 57.79 | |||||||||||||
| NO YRS | 48 | 49 | 49 | 49 | 47 | 46 | 45 | 47 | 50 | 44 | 48 | 49 | 29 | |||||||||||||