| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.46 | s | 37.28 | 29.31 | 33.29 | |||
| 1952 | 26.34 | b | 33.53 | 35.48 | 48.63 | 54.84 | 59.05 | 71.10 | 68.65 | 61.23 | 54.15 | 31.70 | b | 31.53 | 48.02 | |||||||||||
| 1953 | 40.94 | 35.96 | 39.85 | 45.45 | 49.00 | 56.15 | 71.45 | 67.24 | 64.50 | 49.82 | 43.92 | 33.03 | 49.78 | |||||||||||||
| 1954 | 33.92 | 39.27 | 36.87 | a | 47.78 | 58.47 | 59.03 | 72.56 | 63.68 | 57.48 | 47.87 | 42.98 | 27.83 | a | 48.98 | |||||||||||
| 1955 | 25.90 | 29.41 | 37.56 | 42.15 | 52.42 | 62.48 | 68.37 | 72.23 | 59.93 | 48.58 | 37.15 | 34.94 | 47.59 | |||||||||||||
| 1956 | 34.31 | 29.72 | 41.55 | 46.77 | 55.60 | 61.48 | 70.69 | 65.89 | 60.90 | 47.50 | 36.23 | 31.21 | 48.49 | |||||||||||||
| 1957 | 22.11 | 36.82 | 40.82 | 45.15 | 52.63 | 64.32 | 69.18 | 64.83 | a | 61.35 | 46.31 | 35.03 | 35.97 | 47.88 | ||||||||||||
| 1958 | 32.56 | 40.45 | 35.69 | 44.22 | 59.76 | 61.12 | 69.23 | 71.16 | 57.58 | 50.73 | 39.88 | 39.40 | 50.15 | |||||||||||||
| 1959 | 34.76 | 32.96 | 39.94 | 48.93 | 49.69 | 65.65 | 74.23 | 67.76 | 58.68 | 51.95 | 39.25 | 28.24 | 49.34 | |||||||||||||
| 1960 | 26.40 | 31.78 | 43.08 | 47.67 | d | 53.19 | 65.62 | 75.66 | 67.97 | 62.58 | 49.74 | 37.73 | 32.11 | 49.46 | ||||||||||||
| 1961 | 33.35 | 39.96 | 40.44 | 46.36 | a | 53.34 | 68.65 | 73.34 | 72.95 | 55.52 | 48.23 | ----- | z | ----- | z | 53.21 | ||||||||||
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.75 | z | 40.65 | 34.45 | 37.55 | |||
| 1963 | 27.95 | 43.25 | 38.73 | 41.85 | 57.27 | 58.57 | 68.39 | 68.47 | 63.80 | 55.08 | a | 38.19 | v | 31.58 | 50.45 | |||||||||||
| 1964 | 30.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.53 | ||
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1966 | ----- | z | ----- | z | ----- | z | 47.00 | i | 59.56 | 62.42 | 70.40 | 71.79 | 65.25 | 51.26 | 41.33 | 32.44 | 56.81 | |||||||||
| 1967 | 31.53 | 37.79 | 37.74 | 37.05 | 57.46 | f | 61.52 | 73.32 | 80.98 | 59.08 | 49.32 | 40.06 | e | 29.55 | 48.90 | |||||||||||
| 1968 | 33.24 | 38.71 | 44.26 | 44.73 | 54.58 | ----- | z | 76.45 | ----- | z | ----- | z | ----- | z | 44.25 | t | 31.42 | 46.20 | ||||||||
| 1969 | ----- | z | ----- | z | ----- | z | 49.48 | 60.50 | 63.20 | 72.03 | 70.32 | 62.97 | 44.27 | 39.80 | 35.61 | 55.35 | ||||||||||
| 1970 | 34.06 | 40.25 | 40.13 | 41.60 | 55.50 | 64.10 | 71.10 | 71.27 | 55.55 | 46.08 | 40.65 | 31.47 | 49.31 | |||||||||||||
| 1971 | 36.13 | 37.11 | 38.52 | 45.62 | 53.27 | 59.73 | 70.44 | 72.79 | 55.85 | 45.16 | 38.72 | 27.87 | 48.43 | |||||||||||||
| 1972 | 28.48 | 36.90 | 46.85 | 46.58 | 57.87 | 65.08 | 71.06 | 69.77 | 57.12 | 48.52 | 37.95 | 26.16 | 49.36 | |||||||||||||
| 1973 | 28.87 | a | 38.82 | 40.63 | 46.27 | ----- | z | 66.48 | e | 72.81 | 70.23 | 59.66 | a | ----- | z | 44.22 | l | 35.82 | c | 51.06 | ||||||
| 1974 | 28.81 | 35.25 | 38.44 | 44.70 | 54.06 | 68.60 | 74.02 | i | 68.77 | 62.23 | 48.65 | 38.82 | 30.48 | e | 47.16 | |||||||||||
| 1975 | 32.21 | e | 32.21 | 36.90 | 39.00 | 52.32 | 61.17 | 72.26 | 66.44 | 61.97 | 46.56 | e | 36.93 | c | 35.12 | c | 47.76 | |||||||||
| 1976 | 31.65 | a | 39.83 | i | 35.60 | 44.50 | e | 57.68 | 61.72 | a | 72.98 | 64.16 | 61.48 | 48.97 | 41.08 | 30.29 | g | 51.98 | ||||||||
| 1977 | 25.80 | k | 37.89 | 37.73 | 50.28 | 51.40 | 68.82 | ----- | z | 68.30 | p | 60.55 | 50.63 | 40.42 | 36.73 | 48.27 | ||||||||||
| 1978 | 35.03 | 37.23 | 42.68 | l | 45.52 | 52.74 | 62.48 | a | 71.11 | c | 67.98 | 56.74 | a | 54.06 | 35.17 | a | 26.04 | g | 51.81 | |||||||
| 1979 | 21.71 | 34.43 | 40.11 | d | 45.79 | a | 55.55 | 63.07 | 72.52 | 69.60 | 66.17 | f | 50.61 | m | 34.27 | 34.76 | d | 47.18 | ||||||||
| 1980 | 32.00 | 40.04 | a | 37.77 | 49.27 | 54.97 | 59.63 | 71.52 | 67.24 | 62.12 | e | 51.00 | 40.93 | 34.74 | 50.10 | |||||||||||
| 1981 | 31.60 | 36.54 | 40.61 | 49.60 | a | 53.97 | 65.18 | 71.29 | c | 72.77 | 62.72 | 46.94 | 41.93 | 37.03 | 50.85 | |||||||||||
| 1982 | 30.39 | 33.96 | 38.90 | 42.37 | 52.52 | 62.07 | 69.47 | 71.69 | 59.05 | 47.85 | 32.97 | 31.42 | 47.72 | |||||||||||||
| 1983 | 34.02 | 38.66 | 40.79 | 41.90 | 53.42 | 60.28 | 68.10 | 71.40 | 60.58 | 52.32 | 39.90 | 31.17 | b | 49.38 | ||||||||||||
| 1984 | 22.44 | 32.76 | 41.94 | 43.38 | 56.85 | 59.88 | 73.34 | 72.35 | 59.43 | 45.19 | 37.17 | j | 26.77 | 48.58 | ||||||||||||
| 1985 | 26.55 | 31.26 | a | 37.11 | 50.77 | 55.97 | 66.98 | 76.45 | 68.48 | 54.25 | 48.31 | 32.27 | 26.35 | 47.90 | ||||||||||||
| 1986 | 37.10 | 40.84 | 46.58 | 47.52 | 54.97 | 68.95 | 69.11 | 73.66 | 55.23 | 50.19 | 41.93 | 31.50 | 51.47 | |||||||||||||
| 1987 | 28.82 | 36.32 | 41.45 | 54.50 | ----- | z | 66.14 | a | 67.10 | 67.94 | 60.50 | p | 53.00 | 37.07 | 31.19 | 48.35 | ||||||||||
| 1988 | 28.79 | 36.86 | 41.23 | 50.02 | 55.38 | a | 67.35 | 75.29 | 69.77 | 60.32 | 56.55 | 38.58 | 27.60 | 50.64 | ||||||||||||
| 1989 | 25.66 | 25.11 | 43.89 | 50.87 | 53.65 | 64.22 | 74.03 | 66.79 | 59.07 | a | 48.84 | 39.63 | 32.16 | 48.66 | ||||||||||||
| 1990 | 33.68 | 31.64 | 42.40 | 54.52 | 52.39 | 64.42 | 73.16 | 70.89 | 65.27 | 51.48 | 38.07 | 22.08 | 50.00 | |||||||||||||
| 1991 | 29.84 | 41.59 | 39.03 | 45.92 | 50.29 | 59.42 | 72.53 | 72.00 | 63.30 | 53.82 | 40.78 | 31.61 | 50.01 | |||||||||||||
| 1992 | 33.95 | 40.29 | 44.74 | 53.17 | 62.47 | 65.57 | 69.89 | 71.69 | 61.77 | 53.55 | 36.08 | 27.97 | 51.76 | |||||||||||||
| 1993 | 22.69 | 26.96 | 44.74 | 47.13 | 58.55 | 58.68 | 63.34 | 65.88 | a | 61.03 | 51.82 | 32.58 | 32.31 | 47.14 | ||||||||||||
| 1994 | 36.34 | 33.68 | 45.16 | 49.67 | 57.95 | 65.58 | 74.48 | 72.45 | 62.72 | 48.82 | 32.43 | 27.48 | 50.56 | |||||||||||||
| 1995 | 34.82 | 43.14 | 40.13 | 45.73 | 52.35 | 59.92 | 70.10 | 68.08 | 62.90 | 49.98 | 46.27 | 34.45 | 50.66 | |||||||||||||
| 1996 | 34.11 | 35.64 | 42.97 | 48.88 | 54.00 | 63.98 | 73.50 | 70.76 | 59.48 | 49.79 | 41.32 | 36.52 | 50.91 | |||||||||||||
| 1997 | 33.39 | 34.66 | 44.98 | 45.42 | 58.82 | 63.03 | 69.74 | ----- | z | ----- | z | 49.82 | 40.92 | 28.84 | 46.96 | |||||||||||
| 1998 | 37.50 | 35.29 | 41.10 | 44.52 | 50.65 | 59.42 | 73.55 | 72.18 | 63.95 | 47.26 | 38.95 | 28.84 | 49.43 | |||||||||||||
| 1999 | 33.00 | 35.21 | 39.58 | 43.63 | 53.71 | 61.75 | 70.48 | 69.24 | b | 59.42 | 53.45 | b | 44.12 | 31.55 | 49.60 | |||||||||||
| 2000 | 34.08 | a | 38.48 | 39.38 | e | 51.35 | 56.71 | 66.66 | a | 71.60 | 71.87 | 58.97 | 47.84 | 33.02 | 31.43 | a | 50.12 | |||||||||
| 2001 | 27.43 | a | 30.77 | 43.11 | d | 43.29 | f | 65.12 | w | 64.69 | a | 69.68 | 73.33 | a | 62.87 | c | 53.48 | b | 38.85 | 31.52 | 49.57 | |||||
| 2002 | 32.47 | 35.12 | 38.45 | 48.80 | 54.79 | 65.75 | 75.55 | 67.10 | 60.67 | 45.48 | 38.25 | 34.44 | 49.74 | |||||||||||||
| 2003 | 39.26 | 33.34 | 44.21 | 43.80 | 54.77 | 65.60 | 76.69 | 71.27 | 63.12 | 54.58 | 35.20 | 34.39 | 51.35 | |||||||||||||
| 2004 | 30.95 | 33.64 | 46.87 | 48.57 | 56.02 | 64.85 | 73.39 | 70.53 | 60.37 | 49.15 | 36.38 | 31.24 | l | 51.88 | ||||||||||||
| 2005 | 27.47 | 33.04 | 42.53 | 46.62 | 54.89 | 59.53 | 74.21 | 71.56 | 58.70 | 49.77 | 37.18 | 31.69 | 48.93 | |||||||||||||
| 2006 | 35.29 | 33.16 | 36.18 | 46.43 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.76 | ||||
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | 58.15 | r | 63.65 | 74.75 | e | 72.43 | h | 61.72 | 50.95 | 42.57 | 30.23 | 53.98 | ||||||
| 2009 | 33.48 | 35.80 | 39.52 | 46.45 | 59.39 | 62.41 | b | 73.24 | 70.32 | 66.20 | 45.58 | 39.67 | 25.71 | 49.81 | ||||||||||||
| 2010 | 36.32 | 37.45 | 40.37 | 44.20 | 49.32 | 62.42 | 72.47 | 69.45 | 61.61 | h | 53.03 | 36.93 | 34.69 | 48.79 | ||||||||||||
| 2011 | 31.53 | 34.21 | 40.88 | b | 43.60 | 50.93 | b | 60.33 | 71.37 | 73.61 | 65.40 | a | 55.43 | p | 36.69 | c | 29.56 | 48.92 | ||||||||
| 2012 | 33.44 | 33.84 | a | 44.13 | 49.93 | 56.06 | 63.22 | a | 75.61 | 73.56 | 64.88 | a | 50.94 | 37.77 | 33.02 | 51.37 | ||||||||||
| 2013 | 21.00 | 35.27 | 44.24 | 53.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.00 | z | 33.50 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.28 | 35.63 | 40.78 | 46.57 | 54.84 | 63.13 | 71.96 | 70.05 | 60.74 | 49.89 | 38.42 | 31.58 | 49.52 | |||||||||||||
| S.D. | 4.49 | 3.78 | 2.99 | 3.51 | 3.02 | 3.02 | 2.61 | 2.99 | 2.89 | 2.89 | 3.24 | 3.39 | 1.22 | |||||||||||||
| SKEW | -0.48 | -0.30 | 0.22 | -0.05 | 0.24 | 0.03 | -0.51 | 0.49 | -0.28 | 0.16 | -0.14 | -0.23 | -0.09 | |||||||||||||
| MAX | 40.94 | 43.25 | 46.87 | 54.52 | 62.47 | 68.95 | 76.69 | 80.98 | 66.20 | 56.55 | 46.27 | 39.40 | 51.76 | |||||||||||||
| MIN | 21.00 | 25.11 | 35.48 | 37.05 | 49.00 | 56.15 | 63.34 | 63.68 | 54.25 | 44.27 | 31.70 | 22.08 | 47.14 | |||||||||||||
| NO YRS | 55 | 54 | 54 | 54 | 51 | 55 | 54 | 52 | 51 | 52 | 53 | 54 | 36 | |||||||||||||