| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.95 | s | 56.84 | 58.26 | 55.08 | 44.95 | 35.65 | 29.03 | 46.64 | |||||||
| 1975 | 29.29 | 26.46 | 29.55 | 30.95 | 41.95 | 49.18 | 58.66 | 52.63 | 54.03 | 41.00 | 29.68 | 28.55 | 39.33 | |||||||||||||
| 1976 | 27.56 | 27.66 | 30.42 | 34.98 | 43.95 | 47.32 | 58.23 | 55.18 | 53.23 | 43.03 | 37.73 | 28.97 | 40.69 | |||||||||||||
| 1977 | 24.61 | 33.48 | 29.65 | 39.70 | 38.68 | 53.42 | 55.77 | 61.84 | 49.08 | d | ----- | z | ----- | z | ----- | z | 42.91 | |||||||||
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.11 | ----- | z | ----- | z | 45.11 | ||
| 1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.15 | m | ----- | z | 9999.00 | |
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.39 | 51.35 | 50.47 | 44.27 | 35.08 | 31.20 | a | 44.96 | ||||||
| 1981 | 30.98 | 30.70 | a | 35.18 | 39.05 | 40.47 | 51.27 | d | 56.17 | e | 61.44 | e | 53.44 | c | 40.00 | k | 35.65 | d | 30.18 | 42.23 | ||||||
| 1982 | 24.32 | a | 25.48 | 31.35 | 33.27 | 42.61 | 50.45 | 56.68 | 58.61 | 48.38 | ----- | z | 29.45 | b | 24.73 | a | 38.67 | |||||||||
| 1983 | 29.69 | ----- | z | 31.78 | v | 34.93 | 46.21 | 48.53 | k | ----- | z | ----- | z | 46.28 | u | 44.94 | ----- | z | ----- | z | 38.94 | |||||
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | 44.61 | m | 48.25 | 59.15 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.25 | ||
| 1985 | 26.33 | m | 26.17 | g | 31.72 | h | 43.46 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.50 | z | 34.43 | a | 27.44 | g | 34.43 | |
| 1988 | 26.21 | 32.41 | 33.83 | a | 41.72 | n | 43.43 | i | 51.94 | m | 59.63 | a | 58.26 | d | 54.18 | 52.43 | j | 32.18 | 28.50 | 40.65 | ||||||
| 1989 | 26.79 | j | 20.52 | g | 32.60 | j | 39.46 | r | 43.11 | 49.61 | l | 55.66 | i | 56.57 | a | 54.38 | q | 48.70 | u | 34.80 | j | 31.03 | 43.57 | |||
| 1990 | 31.02 | 27.82 | ----- | z | 43.58 | r | 48.21 | x | ----- | z | 63.15 | k | ----- | z | 61.50 | u | ----- | z | 36.37 | 22.24 | 29.36 | |||||
| 1991 | 28.32 | 37.77 | 33.11 | 36.86 | s | 44.12 | n | ----- | z | 61.23 | t | 63.14 | i | 56.95 | k | 49.53 | 36.47 | ----- | z | 37.04 | ||||||
| 1992 | 29.89 | 35.66 | ----- | z | 44.81 | i | ----- | z | 57.12 | r | 58.39 | 60.29 | 55.24 | e | 47.31 | j | 34.05 | j | 25.50 | 44.16 | ||||||
| 1993 | 23.32 | 25.36 | 35.95 | 38.58 | r | 47.80 | a | 51.68 | 53.53 | 58.05 | 55.18 | 48.02 | 30.63 | 27.98 | 41.59 | |||||||||||
| 1994 | 31.05 | 28.65 | a | 34.80 | a | 40.27 | 49.06 | 54.18 | 63.81 | 57.26 | 56.33 | j | 43.42 | 24.56 | l | 26.74 | 42.92 | |||||||||
| 1995 | 30.34 | 34.89 | 31.60 | 36.86 | l | 43.27 | r | 48.82 | 58.53 | o | ----- | z | 52.97 | n | 42.85 | 38.32 | b | 29.60 | 36.63 | |||||||
| 1996 | 28.98 | 29.57 | 34.32 | 37.27 | s | 40.30 | p | 52.92 | x | 61.35 | 61.40 | ----- | z | ----- | z | 34.03 | o | 28.81 | b | 40.74 | ||||||
| 1997 | 27.26 | b | 30.04 | 33.59 | o | ----- | z | 51.75 | o | 49.61 | c | 57.80 | k | 61.71 | 51.87 | 41.50 | 36.45 | 26.35 | 40.60 | |||||||
| 1998 | 31.95 | 30.61 | 32.68 | 38.38 | 41.32 | 51.55 | 63.13 | 61.81 | 54.95 | 41.42 | 34.00 | 25.66 | 42.29 | |||||||||||||
| 1999 | 28.74 | 28.00 | 30.65 | 34.75 | 41.18 | 50.98 | 56.71 | 58.47 | b | 51.12 | 45.27 | 39.08 | 28.95 | 41.16 | ||||||||||||
| 2000 | 26.63 | 31.02 | 33.13 | 41.08 | 43.52 | 53.30 | 56.21 | 58.32 | a | 50.84 | b | 42.02 | 29.85 | 29.10 | a | 41.25 | ||||||||||
| 2001 | 26.74 | 28.20 | 35.65 | 35.59 | c | 48.24 | 49.07 | b | 56.61 | 59.19 | 53.50 | 44.34 | b | 35.47 | 27.95 | a | 41.71 | |||||||||
| 2002 | 26.40 | 29.00 | 30.71 | 38.73 | 43.24 | 52.95 | 60.69 | 55.39 | 52.68 | 40.13 | 34.53 | 30.32 | 41.23 | |||||||||||||
| 2003 | 32.47 | 29.25 | 34.73 | 35.62 | 43.98 | 54.30 | 61.34 | 58.47 | 54.13 | 45.06 | 29.12 | 29.35 | 42.32 | |||||||||||||
| 2004 | 28.65 | 29.00 | 36.85 | 39.73 | 44.16 | 52.40 | 60.71 | c | 60.08 | 49.37 | 42.71 | 34.17 | 31.00 | 42.40 | ||||||||||||
| 2005 | 29.77 | 31.23 | 36.16 | 37.60 | 45.34 | 47.27 | 59.94 | 59.31 | d | 49.83 | 43.05 | 31.70 | 25.35 | 41.38 | ||||||||||||
| 2006 | 30.73 | c | 25.52 | 28.92 | 37.33 | j | ----- | z | 54.73 | f | ----- | z | 55.97 | 52.73 | ----- | z | 33.25 | ----- | z | 37.85 | ||||||
| 2007 | ----- | z | 30.57 | 36.78 | a | 37.50 | 48.05 | 51.25 | 62.52 | 58.65 | 50.23 | 39.65 | 35.28 | 25.19 | d | 43.24 | ||||||||||
| 2008 | ----- | z | ----- | z | 30.15 | 32.53 | ----- | z | ----- | z | ----- | z | 58.63 | 51.60 | 43.77 | a | 36.82 | 26.44 | 39.99 | |||||||
| 2009 | 26.73 | 29.48 | 29.95 | i | 35.10 | 46.46 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.44 | ||||
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2011 | 28.69 | 27.95 | 31.66 | 32.85 | 39.97 | 48.26 | a | 55.31 | 59.40 | 54.85 | 44.10 | 32.57 | 28.27 | 40.32 | ||||||||||||
| 2012 | 29.44 | 28.79 | 30.66 | 38.73 | 45.18 | 49.07 | a | 60.45 | 60.45 | 54.90 | 43.65 | 35.70 | 27.61 | 42.05 | ||||||||||||
| 2013 | 25.47 | 29.50 | 34.09 | d | 41.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.00 | z | 29.69 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 28.40 | 29.79 | 32.90 | 36.57 | 43.90 | 50.69 | 58.70 | 58.41 | 52.54 | 43.64 | 34.22 | 27.95 | 41.34 | |||||||||||||
| S.D. | 2.37 | 2.98 | 2.47 | 2.90 | 2.92 | 2.20 | 2.74 | 2.62 | 2.18 | 2.29 | 2.83 | 2.20 | 0.91 | |||||||||||||
| SKEW | -0.34 | 0.86 | 0.06 | -0.22 | 0.16 | 0.09 | 0.15 | -0.94 | -0.37 | 0.59 | -0.37 | -0.60 | -0.82 | |||||||||||||
| MAX | 32.47 | 37.77 | 36.85 | 41.08 | 49.06 | 54.30 | 63.81 | 61.84 | 55.24 | 49.53 | 39.08 | 31.20 | 42.40 | |||||||||||||
| MIN | 23.32 | 25.36 | 28.92 | 30.95 | 38.68 | 47.27 | 53.53 | 51.35 | 48.38 | 39.65 | 29.12 | 22.24 | 39.33 | |||||||||||||
| NO YRS | 28 | 28 | 25 | 20 | 20 | 21 | 23 | 27 | 24 | 23 | 26 | 27 | 12 | |||||||||||||