| 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 | 50.31 | r | 39.50 | 32.79 | 36.15 | |||
| 1963 | 23.90 | 41.82 | 40.65 | 45.15 | 58.31 | 62.60 | 69.13 | 69.24 | 64.32 | 53.50 | 37.77 | 25.68 | 49.34 | |||||||||||||
| 1964 | 24.47 | 26.60 | 36.15 | 46.02 | 53.21 | 61.05 | 71.22 | a | 66.47 | 58.30 | 50.81 | 35.00 | 29.61 | 46.57 | ||||||||||||
| 1965 | 27.94 | 35.18 | 37.29 | 50.13 | 55.32 | 63.43 | 71.15 | 67.68 | 55.17 | 52.47 | 40.77 | 27.65 | 48.68 | |||||||||||||
| 1966 | ----- | z | 32.43 | 40.47 | 49.22 | 59.26 | 61.32 | 71.65 | 72.03 | a | 64.77 | 47.66 | 39.98 | 30.98 | 51.80 | |||||||||||
| 1967 | 33.39 | 37.46 | 39.53 | 41.47 | 55.66 | 62.97 | 75.00 | 73.77 | a | 65.08 | 48.00 | ----- | z | 26.63 | 50.81 | |||||||||||
| 1968 | 26.76 | 38.78 | 43.18 | 43.98 | 55.22 | b | 64.91 | b | 74.05 | a | 64.48 | b | ----- | z | 46.87 | e | 37.15 | c | 29.58 | 47.72 | ||||||
| 1969 | 26.45 | 27.96 | 37.87 | 49.41 | a | 60.20 | a | 63.75 | 71.90 | 69.83 | d | 61.45 | b | 44.39 | 37.23 | 31.84 | 48.52 | |||||||||
| 1970 | 33.00 | a | 38.14 | 39.72 | a | 42.16 | a | 55.71 | 65.65 | 72.24 | 70.50 | 56.23 | 44.41 | b | 37.75 | 25.98 | b | 48.46 | ||||||||
| 1971 | 28.83 | d | 33.87 | a | 32.61 | 44.62 | 54.57 | c | 59.60 | ----- | z | 79.43 | b | ----- | z | 33.30 | z | 35.81 | a | 25.11 | 43.83 | |||||
| 1972 | 26.47 | 32.33 | 43.85 | 45.05 | 58.24 | 66.30 | 71.74 | 72.68 | 52.29 | m | 48.39 | 37.42 | ----- | z | 50.25 | |||||||||||
| 1973 | 27.79 | q | 34.22 | e | 41.43 | h | 49.55 | ----- | z | 65.17 | d | ----- | z | ----- | z | ----- | z | 44.19 | w | 36.12 | 34.30 | c | 43.87 | |||
| 1974 | 26.39 | 34.80 | 40.21 | ----- | z | 54.69 | j | 70.52 | a | 72.19 | 70.65 | 64.30 | 51.50 | i | 39.07 | b | 28.90 | b | 49.67 | |||||||
| 1975 | 24.97 | 31.89 | a | 38.33 | d | 42.38 | b | 55.87 | e | 62.73 | d | 75.93 | b | 67.78 | d | 62.10 | i | 48.98 | c | 35.06 | e | 28.20 | d | 46.56 | ||
| 1976 | 27.32 | q | 30.10 | d | 36.04 | e | 45.72 | l | 58.60 | j | 61.71 | p | 73.93 | h | 66.00 | a | 63.02 | e | 50.35 | g | 40.39 | k | 28.29 | g | 48.79 | |
| 1977 | 18.58 | e | 32.37 | i | 38.85 | h | 53.26 | m | 51.18 | f | 71.25 | n | 72.19 | r | 74.86 | i | 58.03 | n | 51.15 | h | 35.77 | d | 34.50 | 29.62 | ||
| 1978 | 31.95 | c | 36.61 | 46.19 | 47.32 | 53.81 | 63.95 | 72.71 | e | 68.85 | 62.28 | g | 52.23 | a | 33.17 | a | 23.30 | a | 48.19 | |||||||
| 1979 | 14.63 | a | 30.54 | a | 42.27 | 47.00 | 58.40 | ----- | z | 73.86 | q | 71.59 | c | 65.52 | d | 53.28 | a | 34.28 | 30.66 | b | 44.82 | |||||
| 1980 | 26.58 | 36.28 | 39.60 | 51.09 | a | 56.85 | 59.77 | f | 74.30 | f | 76.29 | x | 64.46 | b | 51.65 | 37.69 | d | 30.53 | b | 43.86 | ||||||
| 1981 | 31.11 | 32.50 | h | 44.00 | n | 47.96 | f | 55.40 | 62.78 | a | 72.74 | 75.91 | c | 63.55 | a | 47.73 | a | 39.81 | c | 32.37 | 53.49 | |||||
| 1982 | 24.25 | a | 29.46 | 40.89 | 45.02 | 55.61 | 66.37 | 71.13 | 73.19 | 60.87 | 49.23 | 32.97 | 28.13 | 48.09 | ||||||||||||
| 1983 | 31.76 | 37.71 | 44.08 | 46.85 | 58.92 | 65.05 | 69.79 | 74.32 | 61.98 | 52.31 | 39.90 | 23.63 | 50.53 | |||||||||||||
| 1984 | 21.71 | 28.74 | 40.97 | 46.43 | 54.52 | 61.75 | 75.44 | 74.77 | 61.17 | 48.25 | a | 38.08 | 22.81 | 47.89 | ||||||||||||
| 1985 | 22.94 | 26.11 | 36.82 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.19 | 25.01 | |||||
| 1986 | 27.13 | a | 38.07 | 47.50 | a | 47.15 | 58.18 | 69.10 | 72.00 | 76.73 | 57.13 | 52.18 | 38.98 | b | 28.56 | 51.06 | ||||||||||
| 1987 | 25.39 | 36.98 | 42.23 | 55.72 | 61.40 | 67.15 | ----- | z | ----- | z | ----- | z | 52.45 | 39.45 | a | 31.16 | 45.77 | |||||||||
| 1988 | 24.97 | a | ----- | z | 39.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.03 | 57.66 | 33.12 | 26.02 | 40.62 | ||||||
| 1989 | 21.19 | 21.93 | a | 35.50 | o | 53.27 | o | ----- | z | ----- | z | 75.26 | 73.58 | ----- | z | ----- | z | ----- | z | ----- | z | 47.99 | ||||
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.15 | 16.58 | 26.37 | |||
| 1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1992 | ----- | z | ----- | z | ----- | z | ----- | z | 62.74 | 69.03 | 69.48 | 71.85 | 60.62 | 52.16 | 32.97 | 22.74 | 55.20 | |||||||||
| 1993 | 20.60 | 24.70 | 36.77 | 46.37 | 60.13 | 59.60 | 63.55 | 65.95 | 60.92 | 50.52 | 30.30 | 31.06 | 45.87 | |||||||||||||
| 1994 | 32.00 | 31.89 | 44.94 | 52.90 | 60.71 | 65.90 | 77.47 | 74.05 | 64.92 | 47.45 | 31.10 | 24.74 | 50.67 | |||||||||||||
| 1995 | 31.76 | 40.43 | 41.48 | 46.53 | 57.35 | ----- | z | 71.56 | 66.52 | 62.75 | 44.87 | 40.15 | 30.10 | 48.50 | ||||||||||||
| 1996 | 31.44 | 33.31 | 42.77 | 47.35 | 54.40 | 63.68 | 74.27 | 69.61 | 58.73 | 48.71 | 38.32 | 32.69 | 49.61 | |||||||||||||
| 1997 | 30.45 | 36.04 | 42.26 | 46.88 | 59.06 | ----- | z | 70.45 | 70.16 | 61.85 | 48.87 | 37.58 | 29.24 | 48.44 | ||||||||||||
| 1998 | 33.84 | 35.04 | 41.40 | 47.38 | 54.42 | 62.25 | ----- | z | 75.24 | 67.33 | 49.21 | 40.83 | 27.73 | 48.61 | ||||||||||||
| 1999 | 33.73 | 33.64 | 42.70 | a | 48.68 | 55.55 | 65.77 | 72.65 | a | 72.42 | 61.97 | 51.13 | 41.88 | 29.26 | 50.78 | |||||||||||
| 2000 | 32.08 | 39.26 | 42.27 | 53.98 | 59.69 | 68.48 | 75.07 | a | 74.60 | 60.67 | 49.90 | 31.85 | 30.11 | 51.50 | ||||||||||||
| 2001 | 26.63 | a | 30.91 | 44.89 | 47.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.26 | c | 27.45 | a | 36.17 | ||||
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.65 | 69.89 | c | 63.62 | 52.95 | t | ----- | z | ----- | z | 70.72 | |||
| 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 | 57.89 | m | 60.80 | 73.53 | 73.71 | 60.20 | 50.76 | 34.65 | 24.06 | 53.96 | ||||||||
| 2006 | 31.79 | 32.50 | 39.87 | 49.40 | 58.45 | 68.30 | 78.39 | 71.15 | a | 61.62 | 49.39 | 38.52 | 27.47 | 50.57 | ||||||||||||
| 2007 | 27.47 | 36.80 | 46.31 | 49.60 | 60.27 | 67.37 | 79.85 | 72.55 | 62.37 | 49.47 | 38.33 | 29.60 | 51.67 | |||||||||||||
| 2008 | 25.37 | 34.14 | 38.53 | 43.88 | 57.85 | 64.38 | 74.95 | 71.74 | 62.33 | 50.60 | 40.75 | 26.73 | 49.27 | |||||||||||||
| 2009 | 29.34 | 33.57 | 39.47 | 49.37 | 58.68 | 64.77 | 74.18 | 72.31 | 65.93 | 46.06 | 36.53 | 22.52 | 49.39 | |||||||||||||
| 2010 | 30.27 | 35.66 | 42.73 | 47.12 | 51.77 | 63.20 | 72.02 | 69.35 | 62.63 | 56.75 | z | ----- | z | ----- | z | 52.75 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 27.41 | 33.58 | 40.89 | 47.44 | 57.23 | 64.54 | 73.07 | 71.37 | 62.05 | 49.75 | 37.03 | 27.69 | 49.36 | |||||||||||||
| S.D. | 4.52 | 4.45 | 3.20 | 3.17 | 2.60 | 2.79 | 3.15 | 3.32 | 2.76 | 2.83 | 2.91 | 4.24 | 1.63 | |||||||||||||
| SKEW | -0.63 | -0.57 | -0.18 | 0.46 | 0.03 | 0.21 | -0.28 | -0.02 | -0.58 | 0.23 | -0.54 | -1.06 | -0.50 | |||||||||||||
| MAX | 33.84 | 41.82 | 47.50 | 55.72 | 62.74 | 70.52 | 79.85 | 79.43 | 67.33 | 57.66 | 41.88 | 34.50 | 51.67 | |||||||||||||
| MIN | 14.63 | 21.93 | 32.61 | 41.47 | 51.77 | 59.60 | 63.55 | 64.48 | 55.17 | 44.39 | 30.30 | 14.19 | 45.87 | |||||||||||||
| NO YRS | 38 | 38 | 37 | 34 | 34 | 33 | 33 | 37 | 33 | 34 | 40 | 41 | 18 | |||||||||||||