| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.39 | h | 9999.00 | |
| 1951 | 26.55 | 36.02 | 37.02 | 48.65 | 56.05 | 61.27 | 73.17 | a | 68.53 | 61.07 | 46.71 | 35.77 | 25.77 | 48.05 | ||||||||||||
| 1952 | 20.73 | 30.90 | 35.98 | ----- | z | 57.74 | 63.30 | 72.04 | g | 70.64 | b | 62.62 | 52.79 | 30.29 | d | 32.13 | h | 47.22 | ||||||||
| 1953 | 41.48 | e | 38.81 | d | 42.02 | j | 47.55 | b | 52.31 | m | 58.43 | c | 71.42 | a | 69.04 | g | 62.47 | l | 51.50 | l | 49.00 | z | 30.94 | w | 51.54 | |
| 1954 | 36.48 | a | 39.96 | d | 36.28 | o | 51.32 | b | 60.77 | e | 63.57 | h | 72.20 | d | 66.94 | 59.53 | a | 48.26 | d | 42.52 | f | 28.77 | e | 51.58 | ||
| 1955 | 27.17 | a | 30.58 | c | 39.14 | c | 44.02 | d | 55.97 | b | 66.37 | 68.00 | i | 70.32 | c | 60.90 | d | 50.18 | i | 36.92 | e | 35.27 | a | 46.67 | ||
| 1956 | 33.67 | e | 29.15 | b | 42.46 | g | 46.84 | b | 49.33 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.00 | e | 34.67 | |
| 1957 | 22.80 | a | 36.95 | 43.03 | b | ----- | z | ----- | z | ----- | z | ----- | z | 66.66 | c | 62.25 | f | 49.00 | v | 34.98 | b | 33.82 | l | 40.88 | ||
| 1958 | ----- | z | ----- | z | ----- | z | 44.74 | e | 62.31 | e | 64.00 | h | 69.94 | d | 72.98 | i | 59.06 | c | 51.93 | a | 45.93 | o | 37.70 | h | 57.60 | |
| 1959 | 32.57 | c | 32.71 | 37.57 | b | 49.40 | 50.87 | e | 65.43 | 72.02 | 66.50 | 62.67 | l | 50.06 | 36.08 | 23.82 | 47.00 | |||||||||
| 1960 | 22.12 | a | 32.80 | a | 42.90 | 47.94 | d | 53.02 | 64.45 | b | 74.53 | 65.06 | d | 60.68 | b | ----- | z | 38.02 | b | 27.43 | c | 48.09 | ||||
| 1961 | 29.38 | a | 40.02 | a | 42.17 | h | 45.23 | b | 54.74 | d | 67.91 | a | 71.15 | 73.96 | d | 55.33 | a | 48.60 | 34.78 | a | 31.40 | b | 50.23 | |||
| 1962 | ----- | z | 34.48 | d | 38.00 | d | ----- | z | 54.50 | a | 64.67 | c | 69.77 | a | 67.68 | c | 61.83 | 50.05 | 40.93 | 32.77 | 51.47 | |||||
| 1963 | 25.94 | 41.57 | 39.48 | 42.25 | 56.83 | b | 60.08 | 68.77 | 68.76 | 65.00 | 53.55 | 40.03 | 29.27 | a | 49.29 | |||||||||||
| 1964 | 29.52 | 32.60 | ----- | z | 44.45 | ----- | z | 61.36 | a | 72.74 | 67.35 | 56.68 | 51.66 | 36.33 | 34.53 | 48.72 | ||||||||||
| 1965 | 31.31 | 37.48 | a | 38.18 | a | 50.27 | 52.90 | a | 62.33 | a | 69.39 | 67.81 | 53.93 | 52.45 | 41.47 | a | 28.85 | a | 48.86 | |||||||
| 1966 | 31.89 | 32.59 | 41.35 | a | 47.13 | 59.86 | c | 62.98 | 71.42 | 72.07 | q | ----- | z | 47.00 | e | 41.58 | 31.16 | 46.70 | ||||||||
| 1967 | 34.12 | a | 36.93 | a | 39.42 | 40.52 | b | 54.72 | a | 61.88 | a | 75.06 | 74.23 | c | ----- | z | 47.76 | b | 40.09 | b | 28.56 | 48.48 | ||||
| 1968 | 28.81 | 40.76 | ----- | z | 43.68 | b | 55.13 | 64.97 | 74.44 | 66.18 | a | 60.18 | ----- | z | 38.79 | a | 31.29 | c | 50.42 | |||||||
| 1969 | 32.22 | b | 33.66 | 39.64 | b | 49.19 | a | 61.00 | 62.64 | a | 72.02 | 70.22 | a | 60.95 | 44.68 | 36.33 | 31.83 | d | 49.53 | |||||||
| 1970 | 33.68 | 38.83 | a | 39.27 | a | 40.67 | 54.74 | 66.92 | 73.31 | 72.13 | a | 55.84 | b | 44.89 | 39.30 | 29.02 | f | 50.87 | ||||||||
| 1971 | 34.10 | a | 34.73 | 35.08 | 43.35 | c | 54.56 | 60.67 | j | 71.08 | a | 72.73 | 54.22 | a | 46.56 | 36.88 | d | 27.93 | a | 46.48 | ||||||
| 1972 | 27.71 | c | 33.54 | e | 42.69 | 42.68 | 57.58 | 64.92 | 70.21 | 70.42 | a | 56.20 | 50.13 | a | 37.98 | a | 26.88 | c | 48.41 | |||||||
| 1973 | 27.84 | 36.68 | 38.92 | 45.59 | a | 58.48 | a | ----- | z | 74.58 | 69.08 | 59.84 | a | 50.16 | b | ----- | z | 36.57 | a | 49.77 | ||||||
| 1974 | 27.89 | h | 36.48 | 40.15 | 45.57 | a | 54.60 | 69.36 | b | 72.16 | 69.18 | 60.78 | 49.08 | 39.05 | 31.71 | 51.65 | ||||||||||
| 1975 | 27.45 | 36.34 | c | 39.48 | c | 40.64 | a | 52.69 | 62.03 | a | 76.08 | 67.24 | 60.07 | g | 47.69 | 37.22 | a | 35.79 | c | 47.52 | ||||||
| 1976 | 32.68 | 34.50 | 35.00 | 45.66 | b | 57.79 | b | 62.14 | b | 72.71 | 64.40 | 61.77 | 48.15 | a | 40.47 | 25.95 | 48.44 | |||||||||
| 1977 | 18.94 | 34.56 | a | 36.42 | 50.95 | 52.07 | a | 70.26 | a | 71.32 | 70.89 | 60.67 | 50.40 | a | 39.47 | 37.10 | 49.42 | |||||||||
| 1978 | 33.88 | a | 38.39 | 47.03 | a | 47.37 | ----- | z | 62.40 | 71.37 | 69.06 | 57.32 | 50.71 | 34.63 | 26.81 | 49.00 | ||||||||||
| 1979 | 19.26 | 34.61 | 42.05 | 46.91 | a | 56.53 | a | 65.16 | a | 72.34 | b | 69.31 | 64.02 | 51.57 | a | 33.18 | 32.39 | 48.94 | ||||||||
| 1980 | 30.94 | 37.76 | 38.18 | 50.07 | 54.84 | b | 60.63 | 72.44 | 66.94 | 61.73 | b | 49.87 | a | 38.62 | a | 31.00 | c | 49.42 | ||||||||
| 1981 | 32.10 | b | 36.16 | 40.78 | d | 48.73 | 53.40 | 64.25 | b | 70.02 | 71.55 | 61.22 | 46.87 | 40.42 | 35.73 | 50.10 | ||||||||||
| 1982 | 27.31 | 32.89 | 39.56 | 43.28 | 53.35 | 63.25 | 69.10 | 69.98 | 58.28 | 47.44 | 31.02 | 30.74 | 47.18 | |||||||||||||
| 1983 | 33.52 | 39.95 | 41.71 | 44.27 | 54.60 | 61.32 | 67.52 | 71.00 | 59.45 | 51.00 | 40.43 | 28.21 | b | 49.41 | ||||||||||||
| 1984 | 18.41 | b | 28.60 | 42.79 | 44.03 | 56.65 | 59.92 | 73.34 | 70.58 | 57.25 | 45.47 | 38.00 | 23.98 | 46.59 | ||||||||||||
| 1985 | 23.35 | a | 27.55 | 35.23 | 49.60 | 57.69 | 65.48 | 76.13 | 67.69 | ----- | z | 46.48 | 29.83 | 15.41 | b | 44.95 | ||||||||||
| 1986 | 29.42 | 41.77 | 46.10 | 47.72 | 56.44 | 69.65 | 69.10 | a | 73.23 | 55.98 | 48.24 | 39.27 | 28.24 | 50.43 | ||||||||||||
| 1987 | 27.15 | 36.50 | 38.17 | k | 53.88 | 59.85 | a | 67.73 | 68.50 | 68.44 | 62.42 | 52.08 | 37.57 | a | 29.16 | b | 51.21 | |||||||||
| 1988 | 27.47 | 38.31 | 42.37 | 51.63 | 57.48 | 69.08 | 74.92 | 69.82 | 59.87 | 56.47 | 39.08 | 28.13 | 51.22 | |||||||||||||
| 1989 | 26.82 | 26.71 | 45.06 | 53.10 | 55.13 | 66.33 | 73.10 | k | 68.23 | 61.10 | 49.05 | 37.05 | 27.84 | 46.95 | ||||||||||||
| 1990 | 31.92 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.93 | 21.19 | 30.35 | ||||
| 1991 | 26.82 | 39.54 | ----- | z | 46.73 | 52.81 | 60.17 | 72.34 | 72.06 | 62.70 | 50.13 | 39.05 | 29.74 | 50.19 | ||||||||||||
| 1992 | 32.34 | 40.05 | 44.47 | 51.38 | 62.27 | 66.25 | 69.76 | 70.65 | 59.88 | 51.18 | 34.33 | 27.85 | 50.87 | |||||||||||||
| 1993 | 20.35 | 25.79 | 41.71 | 46.97 | 58.66 | 59.85 | 63.84 | 64.26 | 59.78 | 49.40 | 29.22 | 31.60 | 45.95 | |||||||||||||
| 1994 | 32.74 | 31.29 | 44.10 | 50.85 | 58.73 | 65.17 | 73.29 | 71.31 | 61.70 | 48.05 | 32.20 | 25.81 | 49.60 | |||||||||||||
| 1995 | 34.92 | 41.34 | 39.84 | 44.75 | 54.53 | 60.48 | 69.00 | 65.50 | 61.30 | 47.95 | 43.67 | 32.84 | 49.68 | |||||||||||||
| 1996 | 32.82 | 34.28 | 42.29 | 48.43 | 53.44 | 63.18 | 74.50 | x | 68.79 | 58.60 | 49.18 | 40.85 | 34.44 | 47.84 | ||||||||||||
| 1997 | 32.05 | 36.27 | 43.56 | 45.47 | 58.23 | 62.37 | 69.47 | 69.55 | 61.72 | 47.53 | 40.47 | ----- | z | 51.52 | ||||||||||||
| 1998 | ----- | z | 35.68 | 41.84 | 47.57 | 53.08 | 59.67 | 74.26 | 71.95 | 65.47 | 46.65 | 41.23 | 26.56 | 51.27 | ||||||||||||
| 1999 | 31.77 | 37.35 | a | 41.06 | 45.52 | 54.81 | b | 63.97 | 69.90 | 69.05 | 58.55 | 49.77 | 41.93 | a | 29.69 | 49.45 | ||||||||||
| 2000 | 33.63 | 38.92 | d | 41.55 | 54.15 | c | 58.34 | 65.70 | 71.95 | 70.29 | 58.97 | 48.88 | a | 31.80 | 29.32 | 50.29 | ||||||||||
| 2001 | 25.15 | 32.00 | a | 44.73 | 45.83 | a | 58.92 | 64.78 | 70.61 | 72.77 | 62.45 | 51.39 | 39.12 | 30.58 | a | 49.86 | ||||||||||
| 2002 | 31.19 | 34.79 | 39.56 | 48.63 | 56.21 | 65.97 | 75.37 | 66.21 | 59.90 | 43.87 | 36.40 | 34.48 | 49.38 | |||||||||||||
| 2003 | 37.50 | 34.11 | 45.52 | 45.63 | 57.13 | 66.07 | 76.55 | 71.89 | 62.15 | 53.50 | 35.67 | 34.34 | 51.67 | |||||||||||||
| 2004 | 27.77 | 34.72 | 46.73 | 50.62 | 56.11 | 65.90 | 73.35 | 70.77 | 59.87 | 49.73 | 36.70 | 33.21 | 50.46 | |||||||||||||
| 2005 | 30.92 | 35.23 | 42.79 | 47.63 | 55.68 | 60.40 | 73.73 | 71.45 | 58.77 | 49.77 | g | 35.48 | 28.19 | 49.12 | ||||||||||||
| 2006 | 34.76 | 33.23 | 38.08 | 47.40 | 57.60 | 68.00 | 76.92 | 68.32 | 60.22 | 47.48 | 39.57 | 28.21 | e | 49.98 | ||||||||||||
| 2007 | 24.34 | f | 37.27 | 46.71 | 49.57 | 60.02 | 66.97 | 77.89 | 72.27 | 59.45 | 48.23 | 38.12 | 27.79 | 53.12 | ||||||||||||
| 2008 | 27.18 | 36.22 | k | 39.45 | 44.20 | 57.13 | 64.02 | 73.47 | 71.39 | 60.53 | 48.40 | 41.37 | 28.82 | 50.54 | ||||||||||||
| 2009 | 32.87 | 34.88 | 40.29 | 47.83 | 60.26 | 64.18 | 72.85 | 71.13 | l | 65.17 | 45.39 | 37.53 | 24.60 | 47.80 | ||||||||||||
| 2010 | 36.44 | 37.96 | 41.90 | 46.38 | 51.82 | 63.13 | 72.56 | 68.90 | 61.30 | 52.89 | 36.42 | 31.66 | 50.11 | |||||||||||||
| 2011 | 28.85 | a | 33.45 | 40.37 | 42.92 | 49.48 | 58.41 | b | 69.45 | c | 70.53 | 63.30 | 49.57 | a | ----- | z | 26.50 | 48.44 | ||||||||
| 2012 | 31.58 | 34.16 | 42.07 | a | 49.57 | a | 54.50 | 62.17 | 74.17 | b | 70.56 | 61.72 | 48.08 | 39.95 | 30.00 | 49.88 | ||||||||||
| 2013 | 15.55 | 34.54 | 42.12 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.73 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 29.45 | 35.33 | 40.95 | 47.02 | 56.15 | 63.92 | 72.09 | 69.49 | 60.17 | 49.17 | 37.52 | 29.58 | 49.37 | |||||||||||||
| S.D. | 5.18 | 3.64 | 3.02 | 3.21 | 2.83 | 2.92 | 2.63 | 2.36 | 2.57 | 2.50 | 3.24 | 3.92 | 1.28 | |||||||||||||
| SKEW | -0.59 | -0.47 | 0.04 | 0.08 | 0.12 | 0.15 | -0.26 | -0.24 | -0.38 | 0.32 | -0.75 | -0.65 | -0.90 | |||||||||||||
| MAX | 41.48 | 41.77 | 47.03 | 54.15 | 62.31 | 70.26 | 77.89 | 74.23 | 65.47 | 56.47 | 43.67 | 37.10 | 51.67 | |||||||||||||
| MIN | 15.55 | 25.79 | 35.00 | 40.52 | 49.48 | 58.41 | 63.84 | 64.26 | 53.93 | 43.87 | 29.22 | 15.41 | 45.95 | |||||||||||||
| NO YRS | 58 | 60 | 53 | 58 | 56 | 55 | 55 | 56 | 53 | 54 | 56 | 56 | 28 | |||||||||||||