| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | 54.56 | 60.47 | 62.06 | 63.65 | 61.15 | 50.34 | 39.39 | c | 38.81 | 53.80 | ||||||||
| 1936 | 41.32 | 34.14 | 42.79 | 52.37 | 57.39 | 61.12 | 63.84 | 65.69 | 59.08 | 54.03 | 41.33 | 41.16 | 51.19 | |||||||||||||
| 1937 | 29.08 | 38.82 | 47.26 | 46.88 | 55.31 | 61.47 | 63.87 | 62.42 | 60.13 | 52.81 | 46.12 | 40.47 | 50.39 | |||||||||||||
| 1938 | 38.81 | 40.16 | 42.68 | 50.60 | 55.26 | 60.25 | 63.26 | 59.90 | 60.63 | 52.34 | 41.28 | 39.42 | 50.38 | |||||||||||||
| 1939 | 40.97 | 38.41 | 45.21 | 51.67 | 55.63 | 57.08 | 63.42 | 64.66 | 60.35 | 52.63 | 45.97 | 44.31 | 51.69 | |||||||||||||
| 1940 | 39.89 | 43.97 | 48.63 | 51.72 | 58.65 | 62.70 | 63.21 | 65.18 | 61.88 | 54.94 | 40.97 | 41.13 | 52.74 | |||||||||||||
| 1941 | 40.69 | 44.93 | 50.48 | 52.13 | 55.35 | 59.78 | 67.08 | 63.95 | 57.65 | 52.73 | 46.12 | 40.58 | 52.62 | |||||||||||||
| 1942 | 35.58 | 41.59 | 44.89 | 50.82 | 54.56 | 58.35 | 65.31 | 65.77 | 60.73 | 53.71 | 42.97 | 41.73 | 51.33 | |||||||||||||
| 1943 | 33.55 | 43.11 | 43.94 | 51.50 | 52.24 | 57.67 | 62.48 | 62.19 | 62.93 | 52.79 | 44.92 | 38.66 | 50.50 | |||||||||||||
| 1944 | 39.05 | 41.55 | 44.00 | 49.52 | 54.42 | 58.37 | 62.97 | 63.27 | 62.37 | 55.46 | c | 44.22 | 37.52 | 51.06 | ||||||||||||
| 1945 | 41.50 | 42.75 | 43.06 | 47.07 | 55.61 | 58.90 | 64.45 | a | 63.42 | 58.65 | 53.45 | 44.15 | 39.81 | 51.07 | ||||||||||||
| 1946 | 40.02 | 41.25 | 45.39 | 48.37 | 56.85 | 57.82 | 63.27 | 63.29 | 59.48 | 49.26 | 41.73 | 40.92 | 50.64 | |||||||||||||
| 1947 | 35.34 | 44.70 | 48.55 | 52.48 | 58.02 | 58.53 | 62.16 | 62.18 | 60.62 | 53.63 | 45.40 | 41.55 | 51.93 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.85 | 60.31 | 58.65 | 49.90 | 41.70 | 35.10 | 51.25 | |||||||
| 1949 | 28.16 | 37.14 | 44.70 | a | 49.65 | 55.48 | 57.60 | 61.35 | a | 62.77 | 62.20 | 48.60 | 48.60 | 38.68 | a | 49.58 | ||||||||||
| 1950 | 27.40 | 38.25 | 42.92 | 47.48 | 52.32 | 60.02 | 63.13 | 65.31 | 60.55 | 50.21 | 44.75 | 45.68 | 49.83 | |||||||||||||
| 1951 | 38.15 | 41.55 | 40.56 | 51.72 | 55.32 | 61.53 | 63.35 | 63.39 | 60.62 | 52.39 | 44.03 | 37.26 | 50.82 | |||||||||||||
| 1952 | 35.71 | 40.79 | 42.68 | 50.27 | 54.90 | 57.73 | 64.07 | a | 63.08 | 62.58 | 57.56 | 41.40 | 40.31 | 50.92 | ||||||||||||
| 1953 | 45.23 | 42.21 | 44.42 | 47.93 | 53.34 | 56.27 | 63.56 | 64.10 | 61.13 | 53.55 | 47.30 | 42.39 | 51.79 | |||||||||||||
| 1954 | 36.10 | 41.71 | 42.77 | 47.18 | 54.26 | 55.80 | 59.97 | 60.84 | 59.12 | 51.63 | 48.10 | 39.63 | 49.76 | |||||||||||||
| 1955 | 38.37 | 39.62 | 40.06 | 44.18 | 51.13 | 57.40 | 59.40 | 62.45 | 59.27 | 51.65 | 39.80 | 38.76 | 48.51 | |||||||||||||
| 1956 | 38.92 | 35.07 | 42.39 | 51.27 | 57.10 | 56.25 | 64.79 | 63.60 | a | 60.02 | 49.87 | 42.42 | 39.40 | 50.09 | ||||||||||||
| 1957 | 31.65 | 40.00 | 45.26 | 50.37 | 56.89 | 59.70 | 62.71 | 62.47 | 64.57 | 52.60 | 42.90 | 42.16 | 50.94 | |||||||||||||
| 1958 | 42.82 | 47.89 | 44.16 | 49.78 | 58.79 | 63.10 | 67.48 | 66.65 | 60.65 | 55.15 | 44.68 | 44.23 | 53.78 | |||||||||||||
| 1959 | 40.68 | 41.16 | 44.81 | 50.30 | 53.76 | 59.00 | 64.52 | 62.34 | 57.77 | 52.89 | 43.92 | 39.95 | 50.92 | |||||||||||||
| 1960 | 36.87 | 41.69 | 43.98 | 49.52 | 51.79 | 59.77 | 64.37 | 61.92 | 59.90 | 53.26 | 44.15 | 38.50 | 50.48 | |||||||||||||
| 1961 | 43.47 | 44.57 | 45.42 | 47.37 | 54.35 | 61.98 | 65.02 | 65.73 | 58.67 | 51.23 | 41.27 | 39.56 | 51.55 | |||||||||||||
| 1962 | 36.94 | 42.64 | 42.79 | 49.77 | 49.85 | 57.37 | 61.31 | 62.50 | 60.50 | 53.35 | 46.62 | 41.56 | 50.43 | |||||||||||||
| 1963 | 34.29 | 47.20 | 44.40 | 48.27 | 54.71 | 57.35 | 60.66 | 63.06 | 62.95 | 54.06 | 45.15 | 40.29 | 51.03 | |||||||||||||
| 1964 | 40.98 | 41.45 | 43.97 | 46.22 | 51.11 | 57.02 | 61.35 | 61.52 | 58.85 | 52.73 | 41.77 | 36.87 | 49.49 | |||||||||||||
| 1965 | 39.55 | 42.61 | 46.74 | 50.07 | 51.31 | 57.68 | 63.32 | 64.18 | 59.18 | 55.16 | 47.20 | 38.63 | 51.30 | |||||||||||||
| 1966 | 39.34 | 41.30 | 44.68 | 49.75 | f | 53.94 | 58.47 | 61.94 | 64.06 | 61.80 | 52.63 | 46.13 | 43.10 | 51.58 | ||||||||||||
| 1967 | 42.56 | 42.96 | 42.68 | 45.12 | 54.24 | 61.68 | 63.63 | 68.47 | 64.30 | 53.76 | 46.07 | 39.32 | 52.07 | |||||||||||||
| 1968 | 39.29 | 46.31 | 47.48 | 47.37 | 54.29 | 58.77 | 64.27 | 62.05 | 60.38 | 50.97 | 45.07 | 36.74 | 51.08 | |||||||||||||
| 1969 | 31.44 | g | 38.68 | 45.85 | 48.58 | 57.08 | 62.25 | 62.35 | 62.21 | 60.00 | 51.16 | 44.95 | 40.94 | 52.19 | ||||||||||||
| 1970 | 39.92 | 45.16 | 45.81 | 46.08 | 54.08 | 60.75 | 63.02 | 63.06 | 57.73 | 50.37 | a | 44.35 | 38.11 | 50.70 | ||||||||||||
| 1971 | 38.39 | 41.14 | 41.74 | 47.42 | 53.95 | 54.78 | 62.37 | 65.85 | 58.28 | 50.37 | 44.68 | 37.61 | 49.72 | |||||||||||||
| 1972 | 37.06 | 41.57 | 46.29 | 45.28 | 57.27 | 59.08 | 64.89 | 66.05 | 58.38 | d | 50.82 | a | 45.32 | 36.05 | 50.67 | |||||||||||
| 1973 | 37.63 | 43.55 | 45.39 | 49.58 | 54.95 | b | 58.05 | 63.00 | 60.64 | i | 60.90 | 51.88 | b | 41.36 | b | 43.32 | 49.96 | |||||||||
| 1974 | 36.89 | 41.50 | 45.00 | 48.93 | c | 51.42 | 58.78 | 62.16 | 64.29 | 64.40 | 52.92 | 46.50 | 43.11 | 51.32 | ||||||||||||
| 1975 | 40.52 | 41.25 | 43.55 | 45.63 | 54.15 | 56.63 | 62.47 | 61.06 | 61.63 | 50.98 | 43.82 | 40.48 | d | 50.18 | ||||||||||||
| 1976 | 40.63 | 40.13 | b | 43.08 | a | 48.18 | 53.85 | 56.90 | a | 62.13 | 61.50 | 61.64 | a | 52.97 | a | 46.69 | a | 39.74 | d | 50.62 | ||||||
| 1977 | 36.76 | 44.70 | 43.58 | 50.77 | 51.02 | d | 59.95 | 60.90 | 66.05 | 58.73 | b | 52.19 | 43.09 | b | 41.56 | 50.78 | ||||||||||
| 1978 | 42.03 | 45.42 | c | 48.24 | 49.33 | a | 53.39 | 61.58 | 64.47 | b | 63.47 | b | 58.97 | 53.79 | 39.33 | 35.79 | 51.32 | |||||||||
| 1979 | 32.06 | 40.50 | 48.68 | 49.85 | 56.37 | 59.18 | b | 64.74 | 63.92 | 63.38 | 55.47 | 43.37 | 43.73 | 51.77 | ||||||||||||
| 1980 | 35.24 | 44.19 | 44.86 | b | 51.82 | 53.97 | 57.02 | 63.65 | 61.63 | 60.37 | 53.89 | 46.77 | 43.45 | 51.40 | ||||||||||||
| 1981 | 43.03 | 43.55 | 48.62 | b | 49.88 | 53.81 | 57.62 | 61.79 | 66.37 | 60.92 | 51.66 | 46.60 | 42.08 | 52.16 | ||||||||||||
| 1982 | 38.60 | 42.30 | 44.77 | 46.28 | 54.10 | 60.20 | 60.77 | 63.06 | 61.18 | 53.89 | 42.37 | 39.23 | 50.56 | |||||||||||||
| 1983 | 43.16 | 45.62 | 48.44 | 50.23 | 55.58 | 57.93 | 61.63 | 64.11 | 57.37 | 51.73 | 45.82 | 34.68 | 51.36 | |||||||||||||
| 1984 | 41.10 | 43.83 | 48.19 | 46.97 | 51.68 | 56.53 | 62.08 | 62.60 | 59.20 | 49.76 | 43.63 | 35.82 | 50.12 | |||||||||||||
| 1985 | 35.47 | 38.98 | 43.24 | 49.68 | 55.08 | 60.25 | 67.13 | 63.92 | 57.68 | 50.45 | 36.25 | 33.77 | 49.33 | |||||||||||||
| 1986 | 42.52 | 43.26 | a | 49.42 | 48.10 | a | 54.44 | 61.95 | 61.03 | 66.87 | 58.37 | 53.90 | 45.88 | ----- | z | 53.25 | ||||||||||
| 1987 | 39.52 | 44.79 | 47.06 | 51.18 | 57.39 | 59.92 | 63.15 | 64.76 | 61.45 | 54.53 | 47.63 | 38.53 | 52.49 | |||||||||||||
| 1988 | 39.32 | 43.50 | 45.76 | 50.25 | 53.48 | 57.83 | 63.45 | 63.19 | 59.30 | 55.60 | 45.13 | 39.98 | 51.40 | |||||||||||||
| 1989 | 40.79 | 34.20 | 44.23 | 52.40 | 54.61 | 61.28 | 61.85 | 63.16 | 61.53 | 52.68 | 46.67 | 41.34 | 51.23 | |||||||||||||
| 1990 | 41.85 | 38.96 | 47.79 | 51.72 | 53.73 | 59.27 | 66.00 | 66.08 | 62.95 | 50.05 | 45.18 | 32.92 | 51.38 | |||||||||||||
| 1991 | 37.90 | 47.18 | 43.24 | 47.90 | 52.50 | 56.63 | 63.66 | 64.23 | 62.08 | 51.53 | 45.57 | 41.35 | 51.15 | |||||||||||||
| 1992 | 42.48 | 47.17 | 49.79 | 52.03 | 57.76 | 62.50 | 65.16 | 64.92 | 57.97 | 53.15 | 44.63 | 38.79 | 53.03 | |||||||||||||
| 1993 | 34.84 | 38.04 | 47.06 | 49.38 | 58.13 | 59.02 | 60.68 | 63.94 | 60.50 | 53.79 | 39.12 | 39.39 | 50.32 | |||||||||||||
| 1994 | 43.61 | 38.75 | 47.87 | 50.72 | 55.44 | 57.72 | 63.89 | 63.68 | 61.97 | 50.10 | 40.37 | 40.24 | 51.19 | |||||||||||||
| 1995 | 42.55 | 45.09 | 45.10 | 47.72 | 56.44 | 59.45 | 64.65 | 61.81 | 63.05 | 51.18 | 48.53 | 40.97 | 52.21 | |||||||||||||
| 1996 | 40.29 | 40.67 | 46.02 | 50.62 | 51.48 | 57.72 | 65.02 | 63.02 | 54.32 | 47.03 | 40.33 | 39.90 | 49.70 | |||||||||||||
| 1997 | 39.98 | 41.98 | 44.84 | 47.97 | 57.27 | 58.42 | 62.69 | 65.69 | 61.52 | 50.81 | 46.90 | 39.24 | 51.44 | |||||||||||||
| 1998 | 41.19 | 44.25 | 46.66 | 48.18 | 53.63 | 59.17 | 65.50 | 64.31 | 61.08 | 50.95 | 45.97 | 38.06 | 51.58 | |||||||||||||
| 1999 | 40.82 | 41.29 | 43.31 | 46.70 | 50.81 | 56.32 | 60.68 | 63.23 | 58.60 | 50.66 | 47.13 | 41.68 | 50.10 | |||||||||||||
| 2000 | 38.10 | 42.00 | 43.18 | 50.25 | 53.52 | 59.37 | 62.65 | 61.73 | 58.57 | 50.89 | 40.13 | 39.06 | 49.95 | |||||||||||||
| 2001 | 39.61 | 39.50 | 44.73 | 46.18 | 53.37 | 56.43 | 60.94 | 62.85 | 58.98 | 50.19 | 45.60 | 39.61 | 49.83 | |||||||||||||
| 2002 | 39.61 | 41.32 | 41.61 | 48.22 | 51.02 | 59.12 | 63.50 | 62.97 | 59.28 | 50.50 | 45.18 | 41.31 | 50.30 | |||||||||||||
| 2003 | 43.31 | 41.03 | h | 46.21 | 47.77 | 53.03 | 60.73 | 64.61 | 63.61 | 60.63 | 55.06 | 41.15 | 40.65 | 52.43 | ||||||||||||
| 2004 | 37.87 | 42.45 | 47.18 | 50.68 | 55.95 | 60.38 | 65.90 | 66.03 | 58.55 | 52.81 | 42.75 | 41.03 | 51.80 | |||||||||||||
| 2005 | 40.56 | 41.11 | 47.44 | 49.43 | 56.77 | 58.00 | 63.53 | 64.98 | 57.03 | 52.79 | 41.87 | 38.32 | 50.99 | |||||||||||||
| 2006 | 42.92 | 39.23 | 43.74 | 48.73 | 54.40 | 60.18 | 64.19 | 62.45 | 59.92 | 50.44 | 43.47 | 38.87 | 50.71 | |||||||||||||
| 2007 | 36.66 | 42.68 | 46.52 | 48.08 | 53.21 | 57.30 | 64.44 | 63.02 | 57.77 | 49.31 | 42.77 | 38.87 | 50.05 | |||||||||||||
| 2008 | 36.29 | 42.34 | 42.37 | 44.58 | 54.58 | 56.20 | 62.31 | 63.81 | 58.98 | 50.21 | 47.10 | 35.02 | 49.48 | |||||||||||||
| 2009 | 37.45 | 39.30 | 41.53 | 47.52 | 53.61 | 60.20 | 65.69 | 63.19 | 60.23 | 50.40 | 44.68 | 33.84 | 49.81 | |||||||||||||
| 2010 | 44.42 | 44.66 | 45.48 | 47.85 | 51.06 | 56.78 | 61.34 | 62.42 | 59.70 | 51.65 | 42.67 | 41.55 | 50.80 | |||||||||||||
| 2011 | 39.52 | 38.00 | 43.19 | 44.22 | 50.34 | 57.13 | 61.21 | 63.35 | 61.83 | 51.79 | 41.97 | 37.37 | 49.16 | |||||||||||||
| 2012 | 38.26 | 41.33 | 42.53 | 48.82 | 52.47 | 55.90 | 61.61 | 64.39 | 59.98 | 51.44 | 46.25 | 41.16 | 50.34 | |||||||||||||
| 2013 | 35.58 | 42.38 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.98 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.80 | 41.83 | 45.04 | 48.94 | 54.35 | 58.82 | 63.18 | 63.63 | 60.21 | 52.17 | 44.07 | 39.65 | 50.88 | |||||||||||||
| S.D. | 3.58 | 2.84 | 2.27 | 2.09 | 2.11 | 1.90 | 1.69 | 1.61 | 1.87 | 1.88 | 2.54 | 2.55 | 0.96 | |||||||||||||
| SKEW | -1.00 | -0.33 | 0.27 | -0.30 | 0.01 | 0.28 | 0.26 | 0.38 | -0.01 | 0.17 | -0.52 | -0.39 | 0.39 | |||||||||||||
| MAX | 45.23 | 47.89 | 50.48 | 52.48 | 58.79 | 63.10 | 67.48 | 68.47 | 64.57 | 57.56 | 48.60 | 45.68 | 53.78 | |||||||||||||
| MIN | 27.40 | 34.14 | 40.06 | 44.18 | 49.85 | 54.78 | 59.40 | 59.90 | 54.32 | 47.03 | 36.25 | 32.92 | 48.51 | |||||||||||||
| NO YRS | 76 | 76 | 76 | 75 | 77 | 77 | 78 | 77 | 78 | 78 | 78 | 77 | 71 | |||||||||||||