| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.97 | 58.02 | 52.83 | 42.97 | 29.32 | 25.68 | 44.63 | |||||||
| 1966 | 8.00 | 28.95 | 30.60 | 41.45 | 45.58 | 56.47 | 59.48 | 56.56 | 51.25 | 39.08 | 26.12 | 23.47 | 38.92 | |||||||||||||
| 1967 | 20.84 | 28.05 | 26.57 | a | 40.10 | 49.16 | 58.03 | 58.12 | c | 58.06 | 52.22 | 43.50 | 33.35 | 27.00 | 41.25 | |||||||||||
| 1968 | 18.89 | 28.83 | 36.13 | 40.22 | 51.92 | 56.88 | 61.31 | 58.34 | 50.32 | 40.50 | 34.43 | 18.00 | 41.31 | |||||||||||||
| 1969 | 5.03 | 23.29 | 34.16 | 42.45 | 51.26 | 58.83 | 57.52 | 54.22 | a | 53.15 | 46.42 | 32.58 | 33.16 | 41.01 | ||||||||||||
| 1970 | 22.63 | 37.61 | 38.73 | 42.25 | 48.85 | 55.12 | 56.13 | 54.79 | 48.85 | 40.85 | a | 30.65 | 21.15 | 41.47 | ||||||||||||
| 1971 | 9.27 | a | 30.62 | b | 29.06 | 40.00 | 45.85 | 57.02 | 59.90 | 57.60 | 50.30 | 40.35 | 30.08 | 18.87 | a | 39.08 | ||||||||||
| 1972 | 12.50 | 18.19 | 27.31 | 36.50 | 47.18 | 53.70 | 61.21 | 57.08 | ----- | z | ----- | z | ----- | z | ----- | z | 39.21 | |||||||||
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.72 | 45.16 | 36.74 | a | 23.81 | m | 44.21 | |||
| 1982 | 8.61 | 21.50 | a | 32.76 | 39.47 | 47.61 | 57.92 | 60.57 | a | 57.82 | a | 52.47 | 41.87 | a | 29.28 | 30.55 | 40.03 | |||||||||
| 1983 | 23.89 | 32.08 | b | 35.68 | 42.97 | 51.40 | 57.73 | 58.90 | 55.32 | 47.42 | 40.84 | 30.05 | 20.25 | a | 41.38 | |||||||||||
| 1984 | 28.12 | a | 33.93 | 40.23 | 42.85 | 49.69 | 54.20 | 55.77 | c | 54.76 | 50.98 | 40.92 | 30.33 | 21.17 | a | 41.91 | ||||||||||
| 1985 | 35.92 | a | 23.93 | 35.24 | 39.93 | 49.71 | 54.40 | 59.06 | 57.90 | 51.71 | b | 40.39 | 20.83 | 31.98 | 41.75 | |||||||||||
| 1986 | 32.76 | 28.75 | 34.58 | 37.31 | a | 49.18 | 56.41 | g | 59.39 | 55.42 | 51.24 | a | 46.24 | 29.10 | 35.02 | 41.73 | ||||||||||
| 1987 | 30.97 | a | 32.16 | ----- | z | ----- | z | 49.26 | 52.50 | 59.00 | a | 57.42 | 48.83 | i | 43.52 | 36.33 | 33.69 | g | 45.14 | |||||||
| 1988 | 25.74 | h | 27.75 | a | 37.06 | 42.12 | 48.87 | a | 55.18 | 53.26 | 54.37 | e | 49.33 | 43.50 | 34.28 | 30.85 | 43.33 | |||||||||
| 1989 | 20.21 | 24.57 | 29.29 | 44.75 | 51.23 | 56.34 | a | 60.92 | a | 58.88 | e | ----- | z | 40.73 | 27.77 | h | 34.60 | b | 42.15 | |||||||
| 1990 | 23.28 | b | 19.39 | 36.50 | 45.04 | c | 52.11 | 57.61 | k | 61.22 | a | 59.34 | c | 53.42 | l | 39.28 | f | 20.53 | a | 20.11 | 37.50 | |||||
| 1991 | 22.39 | 35.02 | b | 33.16 | ----- | z | 49.81 | 56.28 | 58.34 | 56.06 | 51.05 | 40.53 | 33.41 | a | 29.95 | 42.36 | ||||||||||
| 1992 | 33.39 | 28.84 | 36.06 | ----- | z | 48.03 | 56.39 | b | 58.26 | 55.73 | 46.22 | c | 40.00 | 36.23 | 22.75 | a | 41.99 | |||||||||
| 1993 | 21.71 | 28.77 | 35.79 | b | 44.58 | k | 54.62 | c | 58.90 | 62.24 | b | 58.65 | 52.83 | 45.23 | a | 35.35 | 34.11 | c | 44.38 | |||||||
| 1994 | 22.69 | 14.20 | 36.42 | 44.24 | c | 52.81 | j | 57.82 | 60.61 | 61.42 | 50.83 | 43.42 | 26.07 | 25.00 | 40.25 | |||||||||||
| 1995 | 27.89 | h | 26.71 | 31.31 | m | 42.68 | e | 54.20 | c | 56.64 | b | 60.03 | 57.77 | 55.48 | 44.21 | b | 27.18 | h | 22.63 | 46.71 | ||||||
| 1996 | 10.02 | a | 27.74 | 33.24 | 41.30 | e | 50.38 | w | 57.13 | 61.31 | 57.29 | j | ----- | z | ----- | z | ----- | z | ----- | z | 38.46 | |||||
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.28 | 58.55 | 58.77 | 52.78 | ----- | z | ----- | z | 35.82 | 52.84 | ||||||
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | 48.07 | c | ----- | z | ----- | z | ----- | z | ----- | z | 42.67 | a | 32.13 | ----- | z | 40.96 | ||
| 1999 | ----- | z | ----- | z | 29.21 | e | ----- | z | 47.66 | ----- | z | 59.66 | 56.76 | 49.28 | a | 41.85 | a | 33.18 | 30.76 | f | 45.37 | |||||
| 2000 | 20.98 | ----- | z | ----- | z | ----- | z | 44.36 | c | 55.71 | b | 56.48 | a | 56.15 | a | 49.18 | ----- | z | 34.73 | 27.60 | a | 43.15 | ||||
| 2001 | 33.97 | 26.04 | 31.46 | c | ----- | z | 46.95 | a | 56.43 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.97 | |||
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2003 | ----- | z | 32.20 | 31.18 | 43.23 | 48.40 | 55.27 | 59.40 | 56.81 | 50.80 | 45.05 | 30.02 | 30.55 | 43.90 | ||||||||||||
| 2004 | 21.76 | 36.83 | 30.83 | z | 42.28 | 52.48 | 58.28 | 59.11 | 59.13 | 49.85 | 42.24 | 37.62 | 31.69 | 44.66 | ||||||||||||
| 2005 | 22.73 | 28.64 | 37.55 | 45.05 | 52.94 | 56.12 | 57.29 | 57.18 | 51.28 | 42.89 | 34.65 | 33.40 | 43.31 | |||||||||||||
| 2006 | 26.95 | 28.27 | 27.76 | 40.43 | 48.31 | 54.65 | 56.61 | 55.05 | 50.70 | 43.40 | 18.67 | 32.71 | 40.29 | |||||||||||||
| 2007 | 30.11 | 22.41 | 26.44 | 39.78 | 47.44 | 54.62 | 55.74 | 56.69 | 50.43 | 42.37 | 36.62 | 24.56 | 40.60 | |||||||||||||
| 2008 | 22.58 | 26.64 | 34.55 | 40.00 | 48.19 | 51.98 | 53.97 | 53.76 | 50.15 | 41.60 | 35.38 | 21.89 | 40.06 | |||||||||||||
| 2009 | 20.56 | 24.98 | 29.39 | 39.82 | 49.42 | 55.42 | 60.50 | 55.89 | 50.60 | 43.98 | 34.57 | 28.18 | 41.11 | |||||||||||||
| 2010 | 28.37 | 35.07 | 36.32 | 42.40 | 50.89 | 54.58 | 55.60 | 56.60 | 51.40 | 44.15 | 34.88 | 22.05 | 42.69 | |||||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 22.04 | 27.80 | 33.19 | 41.49 | 49.39 | 56.09 | 58.66 | 56.92 | 50.86 | 42.59 | 31.53 | 27.16 | 41.01 | |||||||||||||
| S.D. | 8.27 | 5.38 | 3.85 | 2.18 | 2.42 | 1.76 | 2.20 | 1.72 | 1.78 | 1.92 | 4.89 | 5.51 | 1.17 | |||||||||||||
| SKEW | -0.38 | -0.37 | -0.24 | -0.27 | 0.24 | -0.39 | -0.66 | 0.23 | -0.13 | 0.21 | -1.17 | -0.02 | 0.00 | |||||||||||||
| MAX | 35.92 | 37.61 | 40.23 | 45.05 | 54.62 | 58.90 | 62.24 | 61.42 | 55.48 | 46.42 | 37.62 | 35.82 | 43.31 | |||||||||||||
| MIN | 5.03 | 14.20 | 26.44 | 36.50 | 44.36 | 51.98 | 53.26 | 53.76 | 46.22 | 39.08 | 18.67 | 18.00 | 38.92 | |||||||||||||
| NO YRS | 29 | 31 | 29 | 26 | 32 | 31 | 34 | 33 | 30 | 31 | 31 | 30 | 16 | |||||||||||||