| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 66.38 | r | 49.83 | 40.39 | 45.11 | |||
| 1963 | 34.52 | 52.75 | 53.45 | 56.83 | 71.81 | 75.63 | 87.13 | 87.74 | 81.00 | 67.90 | 48.47 | 33.32 | 62.55 | |||||||||||||
| 1964 | 33.77 | 39.10 | 47.16 | 61.23 | 68.71 | 75.40 | 88.80 | a | 85.90 | 76.43 | 68.84 | 46.27 | 38.35 | 60.83 | ||||||||||||
| 1965 | 36.81 | 45.36 | 53.35 | 63.50 | 69.84 | 78.83 | 89.68 | 82.87 | 72.53 | 70.19 | 52.63 | 38.42 | 62.83 | |||||||||||||
| 1966 | ----- | z | 42.93 | 54.90 | 66.30 | 76.84 | 77.47 | 90.00 | 91.03 | a | 82.10 | 64.94 | 50.23 | 37.42 | 66.74 | |||||||||||
| 1967 | 41.94 | 48.46 | 51.48 | 52.83 | 71.26 | 78.73 | 93.87 | 94.97 | a | 85.03 | 62.84 | ----- | z | 36.10 | 65.23 | |||||||||||
| 1968 | 35.26 | 48.41 | 57.90 | 58.93 | 70.57 | a | 81.43 | b | 93.57 | a | 79.24 | b | ----- | z | 62.46 | e | 45.46 | b | 37.52 | 60.98 | ||||||
| 1969 | 34.97 | 36.93 | 50.00 | 64.33 | 75.47 | a | 78.90 | 89.42 | 91.26 | d | 79.04 | b | 58.52 | 50.97 | 40.23 | 62.50 | ||||||||||
| 1970 | 40.90 | a | 49.39 | 51.30 | a | 56.24 | a | 70.71 | 81.73 | 90.48 | 91.52 | 73.40 | 59.41 | b | 47.27 | 34.73 | a | 62.26 | ||||||||
| 1971 | 37.07 | c | 43.81 | a | 42.16 | 57.87 | 67.75 | c | 73.47 | ----- | z | 98.17 | b | ----- | z | 44.60 | z | 48.03 | a | 34.35 | 55.85 | |||||
| 1972 | 35.87 | 43.14 | 56.61 | 60.27 | 75.42 | 82.83 | 90.94 | 92.77 | 68.71 | m | 64.19 | 47.37 | ----- | z | 64.94 | |||||||||||
| 1973 | 36.79 | q | 42.09 | e | 54.26 | h | 65.50 | ----- | z | 83.57 | b | ----- | z | ----- | z | ----- | z | 56.33 | v | 44.53 | 41.61 | c | 55.46 | |||
| 1974 | 34.81 | 43.64 | 52.06 | ----- | z | 69.05 | i | 88.31 | a | 89.68 | 89.65 | 84.17 | 66.67 | g | 49.82 | b | 36.38 | b | 63.17 | |||||||
| 1975 | 33.87 | 39.96 | a | 48.00 | d | 53.69 | a | 70.85 | d | 77.74 | c | 92.13 | a | 84.00 | d | 81.95 | i | 60.64 | c | 45.85 | c | 38.14 | c | 58.63 | ||
| 1976 | 36.36 | q | 39.32 | d | 47.89 | d | 60.11 | k | 76.71 | j | 80.36 | p | 91.12 | e | 80.47 | a | 78.38 | d | 66.68 | f | 54.18 | h | 40.64 | f | 67.44 | |
| 1977 | 28.15 | e | 45.76 | g | 51.91 | h | 70.95 | i | 63.33 | d | 86.35 | m | 90.88 | n | 89.77 | e | 72.10 | j | 65.69 | e | 45.96 | c | 41.39 | 55.72 | ||
| 1978 | 39.38 | b | 43.29 | 58.29 | 58.53 | 67.06 | 79.53 | 88.63 | d | 85.90 | 75.88 | f | 68.83 | a | 43.70 | 32.87 | 60.55 | |||||||||
| 1979 | 25.23 | 38.63 | a | 53.68 | 59.67 | 72.77 | ----- | z | 93.12 | n | 86.41 | b | 84.11 | b | 65.29 | 44.07 | 37.97 | 56.78 | ||||||||
| 1980 | 33.55 | 42.45 | 50.42 | 65.20 | 69.48 | 74.96 | e | 91.69 | e | 92.22 | v | 79.10 | a | 65.35 | 48.08 | d | 37.86 | b | 59.83 | |||||||
| 1981 | 35.32 | 42.10 | h | 57.05 | l | 62.04 | b | 69.39 | 78.14 | a | 91.97 | 94.86 | c | 81.14 | a | 61.47 | a | 49.30 | c | 40.16 | 66.38 | |||||
| 1982 | 33.65 | 38.04 | 51.58 | 58.77 | 70.68 | 80.93 | 86.77 | 91.00 | 76.07 | 62.35 | 42.83 | 35.19 | 60.66 | |||||||||||||
| 1983 | 39.06 | 45.39 | 53.48 | 59.47 | 74.39 | 79.80 | 85.39 | 89.74 | 78.30 | 65.94 | 49.20 | 31.13 | 62.61 | |||||||||||||
| 1984 | 29.23 | 36.14 | 51.81 | 58.03 | 67.90 | 76.83 | 93.77 | 93.39 | 78.93 | 62.06 | 46.40 | 33.58 | 60.67 | |||||||||||||
| 1985 | 32.42 | 35.68 | 47.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.84 | 34.87 | |||||
| 1986 | 37.94 | 47.39 | 61.37 | a | 62.30 | 75.42 | 90.30 | 91.16 | 95.65 | 70.77 | 66.45 | 50.67 | 36.52 | 65.49 | ||||||||||||
| 1987 | 35.87 | 47.61 | 54.55 | 75.00 | 76.74 | 84.83 | ----- | z | ----- | z | ----- | z | 67.23 | 49.30 | 40.00 | 59.01 | ||||||||||
| 1988 | 33.48 | ----- | z | 54.94 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.27 | 75.45 | 39.57 | 33.97 | 53.11 | |||||||
| 1989 | 30.68 | 32.43 | 42.50 | o | 66.87 | o | ----- | z | ----- | z | 94.32 | 90.10 | ----- | z | ----- | z | ----- | z | ----- | z | 61.88 | |||||
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.30 | 28.65 | 38.47 | |||
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | 81.13 | 84.73 | 86.55 | 90.19 | 78.43 | 68.97 | 42.17 | 33.32 | 70.69 | |||||||||
| 1993 | 29.97 | 35.07 | 47.45 | 59.47 | 75.71 | 73.77 | 78.77 | 83.39 | 80.13 | 66.16 | 45.60 | 39.65 | 59.59 | |||||||||||||
| 1994 | 39.48 | 42.32 | 60.84 | 67.13 | 75.26 | 81.87 | 94.23 | 93.10 | 82.57 | 63.19 | 40.47 | 35.55 | 64.67 | |||||||||||||
| 1995 | 38.84 | 52.29 | 53.26 | 60.53 | 71.00 | ----- | z | 87.84 | 86.39 | 80.73 | 62.13 | 51.13 | 38.77 | 62.08 | ||||||||||||
| 1996 | 40.84 | 44.34 | 56.13 | 62.17 | 68.03 | 80.17 | 92.42 | 88.48 | 75.43 | 65.06 | 50.37 | 41.19 | 63.72 | |||||||||||||
| 1997 | 39.16 | 46.93 | 57.13 | 61.03 | 75.81 | ----- | z | 86.35 | 88.65 | 79.30 | 64.29 | 49.80 | 38.39 | 62.44 | ||||||||||||
| 1998 | 42.19 | 44.39 | 53.45 | 60.43 | 66.03 | 76.10 | ----- | z | 94.00 | 83.93 | 65.10 | 50.47 | 37.23 | 61.21 | ||||||||||||
| 1999 | 43.26 | 42.68 | 54.71 | 64.03 | 72.55 | 81.83 | 92.06 | 90.23 | 80.90 | 68.90 | 54.40 | 36.94 | 65.21 | |||||||||||||
| 2000 | 40.03 | 48.79 | 55.23 | 69.43 | 74.13 | 85.77 | 92.23 | 93.58 | 78.27 | 64.16 | 41.57 | 38.03 | 65.10 | |||||||||||||
| 2001 | 35.16 | 41.21 | 57.84 | 61.37 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.47 | 33.13 | a | 46.53 | ||||||
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.84 | 87.39 | c | 82.97 | 72.17 | s | ----- | z | ----- | z | 89.07 | |||
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | 71.72 | m | 75.23 | 91.81 | 91.68 | 78.67 | 66.29 | 45.30 | 33.26 | 68.89 | ||||||||
| 2006 | 39.52 | 44.93 | 49.71 | 63.00 | 74.65 | 83.40 | 96.00 | 89.39 | 80.23 | 66.16 | 49.63 | 38.42 | 64.59 | |||||||||||||
| 2007 | 40.48 | 47.61 | 61.35 | 64.80 | 76.84 | 83.50 | 96.87 | 90.52 | 79.30 | 64.52 | 52.40 | 37.58 | 66.31 | |||||||||||||
| 2008 | 35.77 | 43.48 | 50.77 | 60.10 | 71.94 | 79.60 | 91.61 | 88.35 | 80.50 | 66.42 | 52.90 | 37.71 | 63.26 | |||||||||||||
| 2009 | 37.06 | 43.39 | 52.19 | 64.60 | 74.90 | 77.63 | 91.10 | 88.48 | 84.90 | 58.32 | 49.20 | 32.35 | 62.85 | |||||||||||||
| 2010 | 37.65 | 43.14 | 56.03 | 60.33 | 64.55 | 76.57 | 89.45 | 85.55 | 79.37 | 70.00 | z | ----- | z | ----- | z | 65.85 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 36.14 | 43.23 | 53.24 | 61.57 | 71.97 | 79.99 | 90.70 | 89.36 | 79.62 | 65.02 | 47.75 | 36.38 | 63.09 | |||||||||||||
| S.D. | 4.08 | 4.68 | 4.24 | 4.29 | 3.95 | 4.06 | 3.55 | 4.15 | 3.40 | 3.47 | 3.51 | 3.60 | 1.89 | |||||||||||||
| SKEW | -0.54 | -0.17 | -0.15 | 0.68 | -0.11 | 0.53 | -0.91 | -0.36 | -0.63 | 0.40 | -0.48 | -1.17 | -0.11 | |||||||||||||
| MAX | 43.26 | 52.75 | 61.37 | 75.00 | 81.13 | 90.30 | 96.87 | 98.17 | 85.03 | 75.45 | 54.40 | 41.61 | 66.31 | |||||||||||||
| MIN | 25.23 | 32.43 | 42.16 | 52.83 | 63.33 | 73.47 | 78.77 | 79.24 | 70.77 | 58.32 | 39.57 | 23.84 | 59.59 | |||||||||||||
| NO YRS | 38 | 38 | 37 | 35 | 35 | 34 | 35 | 38 | 33 | 35 | 40 | 41 | 18 | |||||||||||||