| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.37 | e | 29.37 | |
| 1955 | 23.87 | 30.52 | 38.66 | 44.05 | 56.15 | 66.83 | 71.73 | 75.81 | 65.00 | 54.85 | 38.50 | 35.63 | 50.13 | |||||||||||||
| 1956 | 34.08 | 28.59 | 42.34 | 50.63 | 58.48 | 65.50 | 74.31 | 70.21 | 64.47 | 50.48 | 38.42 | 31.18 | 50.72 | |||||||||||||
| 1957 | 24.90 | 39.00 | 43.27 | 48.32 | 56.55 | 68.23 | 73.71 | 69.63 | 66.28 | 48.74 | 35.88 | 34.58 | 50.76 | |||||||||||||
| 1958 | 32.79 | 42.05 | 37.82 | 46.33 | 63.90 | 65.65 | 73.92 | 76.45 | 64.60 | 56.89 | 41.35 | 38.47 | 53.35 | |||||||||||||
| 1959 | 36.05 | 35.02 | 42.52 | 52.88 | 52.85 | 69.72 | 77.50 | 72.23 | 61.62 | 53.29 | 41.90 | 30.24 | 52.15 | |||||||||||||
| 1960 | 27.76 | 32.69 | 45.15 | 49.78 | 55.35 | 70.42 | 78.18 | 71.13 | 66.83 | 53.42 | 39.67 | 32.82 | 51.93 | |||||||||||||
| 1961 | 34.24 | 39.05 | 42.42 | 49.08 | 55.27 | 72.20 | 76.95 | 76.10 | 58.88 | 52.32 | 37.33 | 31.23 | 52.09 | |||||||||||||
| 1962 | 23.13 | 30.34 | 39.60 | 54.88 | 55.10 | 67.17 | 73.52 | 71.77 | 66.50 | 53.90 | 42.97 | 34.44 | 51.11 | |||||||||||||
| 1963 | 27.79 | 44.48 | 41.55 | 43.95 | 60.82 | 61.50 | 70.39 | 71.29 | 67.45 | 56.32 | 40.80 | 32.26 | 51.55 | |||||||||||||
| 1964 | 30.23 | 33.50 | 38.89 | 46.47 | 55.05 | 61.27 | 74.87 | 71.40 | 60.70 | 56.60 | 37.62 | 34.11 | 50.06 | |||||||||||||
| 1965 | 31.77 | 37.45 | 41.11 | 50.52 | 53.84 | 64.50 | 73.39 | 68.50 | 57.95 | 56.77 | 41.98 | 29.35 | 50.59 | |||||||||||||
| 1966 | 32.06 | 33.07 | 43.60 | 51.37 | 62.73 | 65.28 | 72.11 | 73.84 | 64.47 | 51.69 | 41.93 | 30.63 | 51.90 | |||||||||||||
| 1967 | 33.37 | 39.12 | 40.73 | 40.47 | 57.50 | 64.17 | 75.79 | 76.76 | 67.13 | 52.34 | 42.15 | 28.60 | 51.51 | |||||||||||||
| 1968 | 31.39 | 43.79 | 45.58 | 47.67 | 57.73 | 67.97 | 78.16 | 67.11 | 63.62 | 52.39 | 39.25 | 30.56 | 52.10 | |||||||||||||
| 1969 | 31.69 | 32.77 | 40.15 | 50.58 | 62.56 | 64.68 | 75.03 | 73.84 | 65.03 | 45.45 | 40.38 | 34.97 | 51.43 | |||||||||||||
| 1970 | 33.27 | 41.50 | 41.26 | 42.33 | 58.26 | 67.68 | 75.61 | 75.34 | 59.28 | 49.21 | 42.35 | 28.31 | 51.20 | |||||||||||||
| 1971 | 33.60 | 37.98 | 39.81 | 47.83 | 55.10 | 63.18 | 74.65 | 76.40 | 59.37 | 46.79 | 38.82 | 26.10 | 49.97 | |||||||||||||
| 1972 | 24.84 | 36.84 | 47.40 | 47.78 | 61.81 | 68.72 | 75.08 | 74.27 | 61.28 | 50.32 | 38.23 | 23.98 | 50.88 | |||||||||||||
| 1973 | 26.82 | 38.43 | 39.71 | 48.02 | 61.82 | 68.30 | 75.65 | 72.34 | 62.73 | 51.85 | 40.53 | 36.37 | 51.88 | |||||||||||||
| 1974 | 28.58 | 36.16 | 43.27 | 47.27 | 57.92 | 70.57 | 72.55 | 72.44 | 66.70 | 51.92 | 41.30 | 31.32 | 51.67 | |||||||||||||
| 1975 | 28.95 | 34.27 | 38.87 | 40.67 | 55.53 | 63.43 | 75.05 | 68.50 | 67.22 | 51.29 | 37.25 | 34.65 | 49.64 | |||||||||||||
| 1976 | 33.00 | 39.26 | 39.45 | 47.53 | 62.05 | 63.57 | 74.13 | 65.87 | 64.77 | 53.11 | 44.13 | 30.48 | 51.45 | |||||||||||||
| 1977 | 25.39 | 38.89 | 38.32 | 53.47 | 51.21 | 71.13 | 74.10 | 73.97 | 62.70 | 54.94 | 41.77 | 36.44 | 51.86 | |||||||||||||
| 1978 | 35.52 | 38.29 | 48.24 | 47.17 | 53.82 | 64.30 | 73.44 | 71.47 | 60.10 | a | 56.76 | 36.77 | 26.92 | 51.07 | ||||||||||||
| 1979 | 24.03 | 34.71 | 43.74 | 48.13 | 58.76 | 67.17 | 72.90 | 70.32 | 66.03 | 54.89 | 35.58 | 31.82 | 50.67 | |||||||||||||
| 1980 | 30.27 | 38.91 | 38.52 | 49.97 | 54.77 | 60.70 | ----- | z | 71.50 | ----- | z | ----- | z | 40.98 | d | 35.21 | 46.76 | |||||||||
| 1981 | 34.70 | a | 36.70 | 42.87 | a | 52.00 | b | 55.52 | d | 67.73 | f | 73.55 | c | 75.62 | e | 66.62 | f | 47.27 | g | 42.82 | 38.40 | a | 50.24 | |||
| 1982 | 28.66 | 35.87 | a | 40.06 | 45.79 | d | 57.22 | d | 64.60 | f | 71.70 | i | 72.56 | 59.57 | 49.26 | 34.02 | 29.67 | e | 45.27 | |||||||
| 1983 | 34.03 | a | 38.41 | 41.02 | 44.37 | 55.40 | 62.65 | 68.16 | 70.89 | 63.55 | 53.74 | 39.58 | 32.15 | 50.33 | ||||||||||||
| 1984 | 20.45 | 31.71 | 43.34 | 47.53 | a | 58.92 | 62.58 | 75.58 | 74.03 | 62.23 | 45.52 | 37.55 | 26.40 | 48.82 | ||||||||||||
| 1985 | 23.45 | 30.05 | 37.12 | a | 52.42 | 59.89 | 70.54 | c | 77.19 | b | 68.50 | 55.22 | 48.98 | 29.45 | 24.68 | 48.12 | ||||||||||
| 1986 | 37.08 | 40.12 | 46.48 | 47.43 | 56.65 | 69.32 | 69.87 | 73.56 | 54.60 | 51.10 | 40.63 | 29.40 | 51.35 | |||||||||||||
| 1987 | 26.61 | 36.07 | 40.13 | 54.48 | 58.98 | 67.00 | 69.19 | 71.97 | 66.00 | 56.77 | 40.23 | 30.02 | 51.46 | |||||||||||||
| 1988 | 26.37 | 35.48 | 42.69 | 51.80 | 57.13 | 67.73 | 76.71 | b | 73.97 | a | 64.23 | 60.55 | 40.52 | 29.50 | 52.22 | |||||||||||
| 1989 | 23.56 | 27.61 | 45.23 | 54.92 | 59.35 | 68.72 | 75.37 | 68.77 | 64.75 | 51.23 | 41.22 | 31.55 | 51.02 | |||||||||||||
| 1990 | 34.06 | 31.55 | 45.60 | 56.42 | 55.44 | 66.15 | 76.05 | 72.02 | 68.05 | 54.40 | 39.73 | 21.65 | 51.76 | |||||||||||||
| 1991 | 28.74 | 43.88 | 40.31 | 46.57 | 52.73 | 62.32 | 76.40 | 73.58 | 66.87 | 55.02 | 41.35 | 32.11 | 51.66 | |||||||||||||
| 1992 | 33.87 | 42.76 | 48.31 | 55.98 | 66.47 | 69.18 | 72.00 | 73.32 | 65.48 | 54.98 | 37.47 | 27.77 | 53.97 | |||||||||||||
| 1993 | 22.23 | 28.73 | 46.44 | 47.92 | 60.40 | 61.33 | 66.71 | 68.68 | 65.72 | 53.66 | 35.52 | 32.76 | 49.17 | |||||||||||||
| 1994 | 34.92 | 34.11 | 47.29 | 52.62 | 61.58 | 68.67 | 77.52 | 73.40 | 66.93 | 51.29 | 32.32 | 26.06 | 52.23 | |||||||||||||
| 1995 | 34.90 | 44.68 | 42.06 | 46.98 | 55.08 | 63.17 | 72.37 | 70.71 | 65.58 | 52.29 | 47.28 | 35.65 | 52.56 | |||||||||||||
| 1996 | 34.53 | 37.74 | 44.02 | 50.68 | 55.87 | 67.00 | 76.53 | 74.37 | 62.62 | 52.98 | 41.50 | 35.76 | 52.80 | |||||||||||||
| 1997 | 32.42 | 36.89 | 47.27 | 48.20 | 63.52 | 65.70 | 73.48 | 73.92 | 66.75 | 52.56 | 43.83 | 30.79 | 52.95 | |||||||||||||
| 1998 | 37.18 | 35.88 | 42.89 | 47.30 | 51.84 | 61.33 | 77.19 | 76.26 | 65.92 | 50.42 | 38.95 | 27.58 | 51.06 | |||||||||||||
| 1999 | 33.19 | 36.68 | 41.90 | 45.85 | 56.23 | 65.20 | 74.95 | 71.58 | ----- | z | 53.92 | 45.35 | 31.98 | a | 50.62 | |||||||||||
| 2000 | 33.76 | 38.98 | 41.52 | 52.90 | 58.82 | 69.55 | 72.77 | a | 73.61 | 62.12 | 50.16 | 34.32 | 31.26 | 51.65 | ||||||||||||
| 2001 | 28.97 | 32.21 | 46.35 | 46.98 | 62.98 | 66.88 | 74.05 | 74.37 | 65.00 | 54.16 | 40.35 | ----- | z | 53.85 | ||||||||||||
| 2002 | ----- | z | ----- | z | ----- | z | 50.53 | 57.10 | 67.70 | ----- | z | ----- | z | 64.93 | 50.52 | ----- | z | 35.55 | 54.39 | |||||||
| 2003 | ----- | z | 34.89 | 44.37 | 44.95 | 58.34 | 69.17 | 78.63 | 72.95 | 66.17 | 56.53 | 36.30 | 34.65 | 54.27 | ||||||||||||
| 2004 | 30.89 | 35.03 | 53.81 | 51.98 | 57.37 | 67.25 | 75.26 | 71.24 | 63.73 | 51.29 | 38.82 | 34.85 | 52.63 | |||||||||||||
| 2005 | 26.94 | 33.91 | 48.40 | e | 49.18 | 58.47 | 60.53 | ----- | z | ----- | z | 60.58 | 51.11 | 39.57 | 33.27 | 46.20 | ||||||||||
| 2006 | 35.50 | 34.02 | 35.73 | ----- | z | 59.79 | j | 68.47 | ----- | z | ----- | z | ----- | z | 43.83 | p | 41.92 | 30.55 | 41.03 | |||||||
| 2007 | 28.16 | ----- | z | ----- | z | 49.11 | g | 58.98 | 67.52 | f | 75.32 | 71.24 | 59.78 | 46.30 | u | 39.75 | 30.29 | 51.93 | ||||||||
| 2008 | 27.19 | 37.75 | c | 40.65 | a | 44.45 | 56.42 | 63.97 | k | 73.19 | 71.16 | l | 63.42 | 49.94 | 43.33 | 30.26 | 46.66 | |||||||||
| 2009 | 32.56 | 39.45 | 40.92 | 45.85 | 59.48 | 63.30 | j | ----- | z | 69.67 | g | 65.30 | 47.06 | 38.98 | g | ----- | z | 47.23 | ||||||||
| 2010 | 41.37 | 45.64 | 41.18 | c | 47.84 | b | 48.44 | 62.28 | 72.95 | 68.03 | 62.03 | 57.06 | 42.07 | 44.56 | 52.79 | |||||||||||
| 2011 | 37.90 | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.41 | s | 71.81 | d | 72.54 | d | 67.67 | 50.40 | b | 37.16 | a | 28.69 | b | 54.71 | ||
| 2012 | 32.10 | 34.90 | 41.22 | m | 0.00 | 45.05 | 64.02 | 74.91 | b | 73.74 | 67.42 | 53.66 | 40.77 | 30.92 | 47.04 | |||||||||||
| 2013 | 16.77 | 34.16 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.47 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.26 | 36.47 | 42.59 | 47.84 | 57.40 | 66.12 | 74.24 | 72.34 | 63.76 | 52.54 | 39.67 | 31.56 | 51.37 | |||||||||||||
| S.D. | 4.83 | 4.21 | 3.46 | 7.49 | 3.83 | 3.07 | 2.51 | 2.55 | 3.16 | 3.09 | 3.17 | 3.94 | 1.17 | |||||||||||||
| SKEW | -0.44 | 0.12 | 0.67 | -4.78 | -0.41 | -0.14 | -0.73 | -0.37 | -0.95 | -0.09 | -0.63 | 0.31 | -0.55 | |||||||||||||
| MAX | 41.37 | 45.64 | 53.81 | 56.42 | 66.47 | 72.20 | 78.63 | 76.76 | 68.05 | 60.55 | 47.28 | 44.56 | 53.97 | |||||||||||||
| MIN | 16.77 | 27.61 | 35.73 | 0.00 | 45.05 | 60.53 | 66.71 | 65.87 | 54.60 | 45.45 | 29.45 | 21.65 | 48.12 | |||||||||||||
| NO YRS | 56 | 56 | 54 | 55 | 56 | 52 | 52 | 53 | 54 | 54 | 56 | 57 | 44 | |||||||||||||