| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1969 | ----- | z | 27.16 | l | 35.42 | 44.52 | 52.58 | 58.38 | 61.55 | 61.31 | 55.52 | 40.69 | 33.92 | 30.00 | 47.39 | |||||||||||
| 1970 | 28.61 | 36.05 | 36.39 | 38.12 | 50.23 | 60.93 | 65.60 | 64.05 | 49.72 | 43.02 | 35.78 | 22.18 | 44.22 | |||||||||||||
| 1971 | 30.06 | 32.95 | 33.19 | 42.27 | 52.10 | 55.58 | 62.44 | 67.29 | 49.47 | 41.63 | 34.37 | 26.05 | 43.95 | |||||||||||||
| 1972 | 24.95 | a | 30.34 | 40.39 | 39.80 | 51.95 | 58.25 | 62.31 | 63.87 | 50.08 | 44.98 | a | 35.37 | 21.47 | 43.65 | |||||||||||
| 1973 | 24.63 | 31.46 | 37.63 | 42.00 | 51.37 | 58.32 | 64.77 | 62.68 | 54.92 | 43.95 | 33.57 | 32.23 | 44.79 | |||||||||||||
| 1974 | 22.29 | 33.75 | 36.47 | 43.67 | 47.81 | 61.80 | 62.89 | 61.73 | 55.35 | 45.19 | 37.35 | 28.08 | 44.70 | |||||||||||||
| 1975 | 26.47 | 28.75 | 34.24 | 37.68 | 47.90 | 53.53 | 67.21 | 59.31 | 55.45 | 45.44 | 33.27 | 31.60 | 43.40 | |||||||||||||
| 1976 | 27.13 | 29.05 | 31.68 | 42.12 | 51.81 | 54.62 | 65.05 | 59.81 | 57.65 | 45.66 | 37.88 | 27.94 | 44.20 | |||||||||||||
| 1977 | 25.27 | 36.36 | 34.95 | a | 47.17 | 47.77 | 61.80 | 62.54 | c | 66.02 | d | 54.52 | 45.22 | a | 35.78 | e | 30.95 | 45.70 | ||||||||
| 1978 | 30.52 | 35.79 | 43.03 | 44.13 | 48.25 | a | 57.45 | 63.13 | 61.25 | a | 55.72 | a | 47.02 | 31.92 | e | 21.78 | b | 45.00 | ||||||||
| 1979 | 14.50 | 32.23 | 38.89 | 44.58 | 52.23 | a | 58.79 | b | 64.78 | a | 64.70 | a | 58.45 | a | 48.95 | 30.31 | f | 32.48 | 46.42 | |||||||
| 1980 | 25.73 | a | 35.69 | 36.81 | 48.13 | 52.80 | f | 55.60 | 63.83 | a | 57.97 | 56.31 | a | 45.72 | b | 36.06 | e | 31.84 | 44.88 | |||||||
| 1981 | 32.58 | 33.32 | 39.44 | 45.05 | 49.06 | e | 54.74 | a | 60.77 | 65.41 | b | 54.60 | 42.92 | 36.59 | g | 30.32 | 46.20 | |||||||||
| 1982 | 24.74 | 26.82 | 36.39 | 39.42 | 47.81 | 59.25 | 61.48 | 63.56 | 54.57 | 44.73 | 32.15 | g | 28.44 | 44.29 | ||||||||||||
| 1983 | 31.89 | 36.54 | 41.24 | 42.88 | 51.73 | 56.33 | 60.90 | 65.95 | 52.40 | 45.73 | 38.07 | 19.87 | 45.29 | |||||||||||||
| 1984 | 25.16 | 31.02 | 39.24 | 41.30 | 48.71 | 55.80 | 63.31 | 65.55 | 53.37 | 41.45 | 36.47 | 21.79 | 43.60 | |||||||||||||
| 1985 | 18.97 | 23.52 | 33.63 | 47.25 | 53.26 | 58.17 | 67.65 | 60.71 | 51.35 | 44.18 | 24.35 | 18.27 | 41.77 | |||||||||||||
| 1986 | 30.15 | 34.45 | 43.81 | 44.93 | 53.48 | 62.90 | 59.89 | 66.11 | 52.17 | 46.74 | 36.17 | 26.52 | 46.44 | |||||||||||||
| 1987 | 24.55 | 33.54 | 40.48 | 51.65 | 54.23 | 61.02 | 62.66 | 60.98 | 58.62 | b | 48.26 | 37.17 | 28.38 | a | 46.79 | |||||||||||
| 1988 | 25.35 | a | 33.67 | 38.76 | 48.25 | 51.69 | 59.74 | a | 63.55 | 63.10 | 55.77 | 53.48 | 36.43 | 25.55 | 46.28 | |||||||||||
| 1989 | 25.58 | 21.41 | 37.76 | 47.87 | 50.85 | 58.97 | 64.53 | 60.63 | 55.82 | 45.21 | 37.87 | 31.13 | 44.80 | |||||||||||||
| 1990 | 32.26 | 31.11 | 40.35 | 48.58 | 49.92 | 58.10 | 66.55 | 65.61 | 61.58 | 45.10 | 37.22 | 18.94 | 46.28 | |||||||||||||
| 1991 | 23.52 | 38.93 | a | 37.60 | 43.67 | i | 48.79 | 54.65 | 64.40 | 67.03 | 57.88 | 46.00 | 33.95 | 30.18 | 45.72 | |||||||||||
| 1992 | 30.60 | 38.93 | 43.44 | 48.23 | 55.82 | 61.13 | 62.08 | 63.74 | 57.00 | 49.53 | 34.35 | 26.40 | 47.61 | |||||||||||||
| 1993 | 20.03 | 25.86 | 40.29 | 44.37 | 56.58 | 56.67 | 56.85 | 60.66 | 55.38 | 48.45 | 28.83 | 30.11 | 43.67 | |||||||||||||
| 1994 | 33.37 | 31.46 | 39.92 | 47.68 | 53.79 | 57.72 | 66.48 | 65.94 | 60.07 | 44.50 | 31.40 | 24.68 | a | 46.42 | ||||||||||||
| 1995 | 30.92 | 37.54 | 39.02 | 44.15 | 51.68 | 56.62 | 64.85 | 61.71 | 59.18 | 43.63 | 39.22 | 28.52 | 46.42 | |||||||||||||
| 1996 | 28.56 | 29.00 | 39.35 | 44.97 | 48.19 | 58.23 | 67.23 | 63.65 | 52.77 | 46.15 | 35.67 | 27.76 | 45.13 | |||||||||||||
| 1997 | 26.39 | 31.46 | 38.52 | 43.02 | 55.10 | 58.17 | 63.34 | 64.98 | 57.33 | 45.94 | 38.28 | 27.15 | 45.81 | |||||||||||||
| 1998 | 31.53 | 36.54 | 38.87 | 46.63 | 52.81 | 57.53 | 70.87 | 67.15 | 63.12 | 46.58 | 36.18 | 26.48 | 47.86 | |||||||||||||
| 1999 | 32.65 | 30.54 | 37.90 | 42.02 | 50.44 | 56.65 | 63.63 | 68.13 | 54.42 | 48.08 | 42.68 | 29.47 | 46.38 | |||||||||||||
| 2000 | 29.45 | a | 35.09 | ----- | z | 49.17 | 51.16 | 57.37 | 65.66 | 65.63 | 54.42 | 47.26 | 28.68 | 25.42 | 46.30 | |||||||||||
| 2001 | 23.97 | 27.71 | 39.61 | 42.75 | 55.15 | 57.83 | 68.60 | 69.55 | 62.93 | 45.73 | 37.42 | 25.31 | 46.38 | |||||||||||||
| 2002 | 27.06 | 25.25 | 32.58 | 44.32 | 51.81 | 58.93 | 71.76 | 61.90 | 56.85 | 36.82 | 36.07 | 31.89 | 44.60 | |||||||||||||
| 2003 | 36.31 | 33.71 | 40.56 | 44.47 | 53.45 | 63.93 | 71.15 | 67.79 | ----- | z | 50.27 | 28.13 | 30.27 | 47.28 | ||||||||||||
| 2004 | 21.58 | 32.97 | 43.53 | 46.80 | ----- | z | 60.80 | 65.97 | 67.69 | 59.58 | 47.97 | ----- | z | ----- | z | 49.65 | ||||||||||
| 2005 | 30.89 | 31.45 | 41.58 | 46.43 | ----- | z | ----- | z | 68.17 | b | ----- | z | ----- | z | ----- | z | ----- | z | 19.48 | 39.67 | ||||||
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | 55.74 | ----- | z | ----- | z | ----- | z | ----- | z | 46.11 | 34.55 | ----- | z | 45.47 | ||||
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | 50.29 | ----- | z | 73.97 | 65.30 | a | 53.81 | a | ----- | z | 32.95 | 27.03 | 50.56 | |||||
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | 24.19 | 28.66 | 30.79 | 38.95 | ----- | z | 59.58 | 65.16 | 68.85 | 55.23 | 43.05 | 28.32 | ----- | z | 44.28 | |||||||||||
| 2010 | 28.66 | 32.68 | 36.74 | 41.67 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.94 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 27.13 | 31.99 | 38.17 | 44.39 | 51.54 | 58.27 | 64.81 | 64.14 | 55.77 | 45.56 | 34.73 | 26.92 | 45.23 | |||||||||||||
| S.D. | 4.46 | 4.10 | 3.25 | 3.28 | 2.51 | 2.41 | 3.43 | 2.89 | 3.31 | 2.90 | 3.68 | 4.07 | 1.42 | |||||||||||||
| SKEW | -0.45 | -0.53 | -0.38 | -0.12 | 0.14 | 0.26 | 0.54 | -0.16 | 0.25 | -0.21 | -0.80 | -0.61 | -0.25 | |||||||||||||
| MAX | 36.31 | 38.93 | 43.81 | 51.65 | 56.58 | 63.93 | 73.97 | 69.55 | 63.12 | 53.48 | 42.68 | 32.48 | 47.86 | |||||||||||||
| MIN | 14.50 | 21.41 | 30.79 | 37.68 | 47.77 | 53.53 | 56.85 | 57.97 | 49.47 | 36.82 | 24.35 | 18.27 | 41.77 | |||||||||||||
| NO YRS | 38 | 38 | 38 | 38 | 36 | 37 | 39 | 38 | 37 | 38 | 35 | 37 | 27 | |||||||||||||