| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1935 | ----- | z | 35.20 | 41.29 | 50.65 | 56.65 | 67.17 | a | 73.13 | 72.10 | 68.36 | b | 56.28 | k | 35.97 | a | 28.21 | 52.87 | ||||||||
| 1936 | 33.74 | 30.09 | 42.48 | a | 55.08 | 62.68 | a | 67.50 | 76.16 | 74.25 | w | 64.00 | 56.94 | 37.48 | 35.00 | 51.01 | ||||||||||
| 1937 | 16.77 | g | 33.71 | 45.50 | 49.82 | 61.16 | 64.45 | 73.76 | 69.90 | 64.15 | 55.23 | 45.28 | 37.90 | 54.62 | ||||||||||||
| 1938 | 36.13 | 40.21 | 43.40 | 51.82 | 58.63 | a | 67.57 | 72.65 | 70.08 | 66.97 | 53.45 | 36.95 | 34.13 | 52.67 | ||||||||||||
| 1939 | 35.31 | 34.14 | 46.58 | 54.37 | 63.85 | 64.11 | b | 73.55 | a | 72.68 | 64.68 | 54.24 | 40.43 | 39.29 | 53.60 | |||||||||||
| 1940 | 33.90 | 40.72 | 48.58 | 52.73 | 62.52 | 70.47 | 74.08 | 73.44 | 64.48 | 54.84 | 37.77 | 35.29 | 54.07 | |||||||||||||
| 1941 | 33.66 | 38.98 | a | 47.82 | 51.82 | 59.63 | 64.77 | 74.26 | 69.79 | 59.93 | 53.32 | 41.67 | 38.26 | 52.83 | ||||||||||||
| 1942 | 24.42 | 34.09 | 41.94 | 53.73 | 55.71 | 62.60 | 74.85 | 72.85 | 64.92 | 55.44 | 40.83 | 36.92 | 51.53 | |||||||||||||
| 1943 | 31.61 | 37.80 | 41.74 | 55.45 | 56.87 | 62.60 | 71.77 | 69.95 | 66.28 | 54.71 | 40.72 | 33.87 | 51.95 | |||||||||||||
| 1944 | 25.39 | 36.71 | 41.53 | 51.67 | 59.00 | 62.73 | 71.65 | 70.63 | 64.73 | 57.74 | 38.93 | 30.79 | 50.96 | |||||||||||||
| 1945 | 32.98 | 40.43 | 43.24 | 49.65 | 59.69 | 64.83 | 75.00 | 71.89 | 61.50 | 56.68 | 41.40 | 32.66 | 52.50 | |||||||||||||
| 1946 | 31.97 | 36.12 | 46.66 | 55.20 | 60.35 | 66.18 | 74.18 | 72.35 | 61.30 | 49.97 | 41.12 | 38.35 | 52.81 | |||||||||||||
| 1947 | 26.32 | 39.86 | 48.61 | 53.12 | 63.68 | 62.85 | 74.63 | 72.24 | 63.37 | 56.08 | 40.38 | 34.13 | 52.94 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.48 | 72.82 | 66.10 | a | 53.52 | 41.87 | 29.34 | 56.02 | ||||||
| 1949 | 14.87 | 35.64 | 46.76 | 55.38 | 62.77 | 66.98 | a | 73.81 | 73.63 | 68.18 | 49.02 | a | 44.73 | 36.15 | 52.33 | |||||||||||
| 1950 | 28.58 | a | 35.68 | 41.56 | 51.10 | 57.35 | 65.18 | 73.21 | 72.95 | a | 63.18 | b | 57.26 | 44.25 | 39.65 | 52.50 | ||||||||||
| 1951 | 32.68 | 37.84 | 41.45 | 54.22 | 60.77 | 63.47 | 74.15 | 70.97 | 64.20 | 51.81 | 38.47 | 33.76 | 51.98 | |||||||||||||
| 1952 | 29.29 | 34.72 | 40.77 | 54.67 | a | 61.24 | 66.23 | 73.92 | a | 72.82 | 67.64 | a | 59.29 | 36.38 | 34.06 | 52.59 | ||||||||||
| 1953 | 42.34 | 40.88 | 47.90 | 50.23 | 56.29 | 62.48 | 74.06 | 70.88 | b | 67.15 | 55.15 | a | 46.60 | 35.05 | 54.08 | |||||||||||
| 1954 | 38.44 | 42.06 | a | 43.24 | 52.59 | a | 62.02 | b | 62.77 | 75.81 | 70.90 | 65.33 | 51.66 | 41.50 | w | 35.18 | a | 54.54 | ||||||||
| 1955 | 30.74 | 32.66 | 40.32 | 47.73 | 57.16 | 68.27 | 72.68 | 74.29 | 64.05 | 54.71 | 38.08 | 37.11 | 51.48 | |||||||||||||
| 1956 | 34.02 | 32.38 | e | 45.65 | a | 52.16 | a | 59.98 | 64.12 | 73.73 | a | 68.79 | 63.67 | 51.50 | 35.35 | 33.95 | a | 51.27 | ||||||||
| 1957 | 20.22 | a | 34.16 | 44.07 | a | 50.86 | a | 59.48 | a | 66.57 | 71.27 | 69.58 | 64.48 | a | 51.40 | 38.45 | a | 35.95 | 50.54 | |||||||
| 1958 | 32.66 | 41.96 | 41.72 | a | 49.65 | 65.84 | 67.57 | 73.73 | 74.34 | 62.97 | 55.95 | 40.80 | 38.47 | 53.80 | ||||||||||||
| 1959 | 35.36 | j | 39.71 | 44.48 | 53.42 | 55.32 | 69.35 | 76.08 | 70.76 | 61.87 | 54.77 | 39.55 | 30.08 | 54.13 | ||||||||||||
| 1960 | 25.21 | 35.05 | 45.50 | 52.67 | 55.98 | 68.92 | 77.52 | 68.92 | 65.38 | 53.47 | 41.37 | 30.18 | 51.68 | |||||||||||||
| 1961 | 31.00 | 42.54 | 46.58 | 52.48 | 60.79 | 73.78 | 76.97 | 77.97 | 60.60 | 52.24 | 39.28 | 32.90 | 53.93 | |||||||||||||
| 1962 | 22.95 | 32.43 | 42.95 | 56.12 | 58.56 | 67.97 | 72.81 | 72.23 | 65.90 | 54.35 | 43.45 | 35.42 | 52.09 | |||||||||||||
| 1963 | 26.32 | 44.62 | 46.82 | 49.32 | 61.63 | a | 65.65 | 72.00 | 72.52 | 68.18 | 57.65 | 42.87 | 30.23 | 53.15 | ||||||||||||
| 1964 | 30.11 | 33.59 | 41.63 | 50.03 | 57.35 | 63.75 | 73.44 | 70.18 | 60.88 | 53.89 | 40.50 | 36.74 | 51.01 | |||||||||||||
| 1965 | 35.26 | 39.80 | 41.60 | 53.38 | 57.98 | 65.77 | 71.87 | 69.98 | 59.22 | 56.02 | 45.23 | 32.00 | 52.34 | |||||||||||||
| 1966 | 36.06 | 37.43 | 46.18 | 52.67 | 62.55 | 65.38 | 73.34 | 73.26 | 68.27 | 51.89 | 44.25 | 35.18 | 53.87 | |||||||||||||
| 1967 | 38.68 | 41.18 | 44.61 | 46.10 | 59.03 | 66.50 | 76.27 | 76.52 | 68.43 | 52.45 | 43.40 | 31.50 | 53.72 | |||||||||||||
| 1968 | 31.40 | 41.62 | 48.23 | 49.82 | 58.68 | 68.10 | 75.58 | 69.65 | 64.12 | 51.84 | 41.22 | 33.93 | c | 52.85 | ||||||||||||
| 1969 | 32.56 | 35.00 | 43.45 | 52.98 | 63.55 | 66.90 | 73.02 | 72.84 | 65.22 | 49.00 | 40.47 | 35.39 | 52.53 | |||||||||||||
| 1970 | 37.55 | 41.80 | 44.21 | 46.88 | 58.97 | 70.02 | 75.29 | 75.05 | 60.18 | 49.65 | 43.40 | 32.29 | 52.94 | |||||||||||||
| 1971 | 35.52 | 38.64 | 40.21 | 48.88 | 59.55 | 62.18 | 72.18 | 75.71 | 58.30 | 50.05 | 39.03 | 31.68 | 50.99 | |||||||||||||
| 1972 | 29.97 | 35.31 | 45.74 | 48.07 | 58.66 | 66.38 | 70.82 | 72.87 | 58.62 | 53.37 | 40.30 | 24.84 | 50.41 | |||||||||||||
| 1973 | 29.68 | 37.29 | 43.87 | 50.38 | 59.45 | 65.32 | 73.08 | 71.13 | 61.52 | 52.15 | 42.67 | 36.62 | c | 51.93 | ||||||||||||
| 1974 | 30.53 | 37.04 | 43.00 | 48.92 | 55.73 | 69.65 | 71.68 | 70.89 | 65.57 | 51.89 | 40.32 | 32.92 | 51.51 | |||||||||||||
| 1975 | 29.13 | 35.48 | 40.73 | 43.88 | 55.47 | 63.00 | 74.42 | 66.63 | 63.43 | 51.23 | 38.40 | 32.44 | 49.52 | |||||||||||||
| 1976 | 32.60 | 33.60 | 38.24 | 47.87 | 59.27 | 61.78 | 71.32 | 66.00 | 62.98 | 50.87 | 40.10 | 28.61 | 49.44 | |||||||||||||
| 1977 | 21.03 | 34.09 | 42.21 | 53.87 | 53.53 | 69.98 | 70.55 | 72.74 | 62.19 | a | 52.90 | 40.55 | 39.13 | 51.06 | ||||||||||||
| 1978 | 35.98 | 39.29 | 47.34 | 49.35 | 56.65 | 64.18 | 71.84 | 68.74 | 60.05 | 52.52 | 35.53 | 27.56 | 50.75 | |||||||||||||
| 1979 | 16.69 | 33.71 | 43.95 | 49.77 | 59.73 | 66.07 | 72.66 | 69.56 | 65.28 | 55.29 | 36.30 | 33.42 | 50.20 | |||||||||||||
| 1980 | 30.21 | 38.79 | 42.76 | 53.43 | 57.47 | 62.88 | 72.37 | 68.44 | 62.28 | 51.66 | 39.43 | 33.95 | 51.14 | |||||||||||||
| 1981 | 33.73 | 37.14 | 45.45 | 50.60 | 56.26 | 62.65 | 70.50 | 74.13 | 64.55 | 50.40 | 43.47 | 36.13 | 52.08 | |||||||||||||
| 1982 | 29.55 | 32.12 | 43.37 | 46.47 | 57.18 | 66.00 | 68.85 | 71.27 | 60.52 | 51.24 | 35.25 | 31.10 | 49.41 | |||||||||||||
| 1983 | 32.73 | 39.73 | 45.26 | 48.05 | 58.85 | 65.13 | 68.27 | 72.21 | 60.10 | 52.13 | 43.63 | 27.34 | 51.12 | |||||||||||||
| 1984 | 26.29 | 31.67 | 43.76 | 48.67 | 56.45 | 64.13 | 72.69 | 73.00 | 59.75 | 49.08 | 40.67 | 26.15 | 49.36 | |||||||||||||
| 1985 | 24.61 | 28.79 | 39.19 | 54.35 | 59.84 | 67.62 | 76.66 | 69.13 | 57.17 | 49.55 | 31.53 | 15.76 | 47.85 | |||||||||||||
| 1986 | 27.45 | 40.36 | 49.68 | 51.38 | 60.10 | 73.55 | 70.66 | 76.89 | 59.13 | 53.31 | 41.70 | 29.53 | 52.81 | |||||||||||||
| 1987 | 27.31 | 37.93 | 44.97 | 56.28 | 62.68 | 69.58 | 71.92 | 69.82 | 67.23 | 55.55 | 41.05 | 33.21 | 53.13 | |||||||||||||
| 1988 | 27.87 | 36.67 | 44.58 | 53.67 | 59.35 | 71.55 | 76.79 | 74.34 | 63.82 | 61.15 | 42.32 | 27.85 | 53.33 | |||||||||||||
| 1989 | 26.05 | 23.21 | 43.84 | 54.20 | 57.66 | 69.32 | 76.98 | 70.61 | 63.62 | 51.77 | 39.88 | 31.35 | 50.71 | |||||||||||||
| 1990 | 34.97 | 35.98 | 45.82 | 56.75 | 57.71 | 68.43 | 77.47 | 74.69 | 69.92 | 51.37 | 41.67 | 20.53 | 52.94 | |||||||||||||
| 1991 | 24.65 | 39.88 | 43.74 | 50.12 | 56.73 | 63.75 | 76.52 | 77.34 | 67.20 | 55.03 | 38.03 | 31.66 | 52.05 | |||||||||||||
| 1992 | 31.29 | 41.43 | 49.39 | 55.58 | 65.37 | 71.53 | 72.77 | 75.76 | 63.90 | 56.02 | 37.07 | 28.97 | 54.09 | |||||||||||||
| 1993 | 26.26 | 29.25 | 40.84 | 49.40 | 62.73 | 62.68 | 65.87 | 68.37 | 63.12 | 53.26 | 33.63 | 33.56 | 49.08 | |||||||||||||
| 1994 | 33.24 | 33.75 | 47.34 | 53.17 | 61.52 | 67.65 | 78.23 | 75.89 | 68.40 | 52.13 | 34.77 | 29.87 | 53.00 | |||||||||||||
| 1995 | 33.84 | 42.52 | 43.39 | 49.10 | 58.27 | 64.98 | 73.47 | 69.18 | 65.23 | ----- | z | 44.15 | 33.39 | 52.50 | ||||||||||||
| 1996 | ----- | z | 36.48 | 45.85 | 51.38 | 56.55 | 66.05 | 75.87 | 73.11 | 60.77 | 52.89 | ----- | z | 36.85 | 55.58 | |||||||||||
| 1997 | 33.77 | 38.73 | 45.45 | 49.48 | 62.02 | 66.43 | 70.85 | 73.27 | 65.88 | 52.50 | 41.03 | 30.97 | 52.53 | |||||||||||||
| 1998 | 37.13 | 38.80 | 43.92 | 49.53 | 57.44 | 63.88 | 77.87 | 75.05 | 69.37 | 51.37 | 43.95 | 31.24 | 53.30 | |||||||||||||
| 1999 | 36.18 | 37.00 | 43.21 | 47.50 | ----- | z | 65.20 | 71.74 | 73.94 | 61.68 | 52.26 | 43.88 | 32.97 | 51.41 | ||||||||||||
| 2000 | 34.37 | 40.36 | 43.03 | 53.80 | 60.44 | 67.42 | 74.77 | 74.69 | 61.47 | 51.21 | 33.97 | 31.89 | 52.28 | |||||||||||||
| 2001 | 28.55 | 32.82 | 45.15 | a | 47.28 | ----- | z | 66.02 | 74.27 | 75.81 | 66.85 | 52.66 | 42.23 | 32.60 | 51.29 | |||||||||||
| 2002 | 33.40 | 32.55 | 41.21 | 51.82 | 58.24 | 68.92 | 78.71 | 70.24 | 65.33 | 51.27 | 38.10 | 35.95 | 52.15 | |||||||||||||
| 2003 | 36.32 | 36.98 | 47.50 | 50.18 | 58.06 | 70.02 | 80.58 | 77.35 | 67.88 | 58.24 | 36.47 | 36.82 | 54.70 | |||||||||||||
| 2004 | 29.81 | 35.52 | 48.98 | 54.85 | 59.26 | 68.72 | 77.29 | 74.94 | 62.80 | 53.98 | 38.77 | 33.77 | 53.22 | |||||||||||||
| 2005 | 32.29 | 34.27 | 46.76 | 49.78 | 58.63 | 63.27 | 75.56 | 75.18 | 61.67 | 52.34 | 36.85 | 28.98 | 51.30 | |||||||||||||
| 2006 | 36.79 | 34.21 | 41.87 | 50.70 | 61.34 | 70.08 | 80.35 | 72.23 | 62.73 | 51.02 | 41.53 | 29.50 | 52.70 | |||||||||||||
| 2007 | 28.61 | 38.80 | 47.08 | 50.87 | 61.65 | 68.87 | 80.82 | 72.55 | 62.82 | 48.58 | 38.80 | 32.34 | 52.65 | |||||||||||||
| 2008 | 28.00 | 36.22 | 39.94 | 45.23 | 58.48 | ----- | z | 75.81 | 73.32 | 62.02 | 50.74 | 41.48 | 31.69 | 49.36 | ||||||||||||
| 2009 | 30.71 | 34.57 | 40.03 | 49.40 | 58.92 | 65.75 | 74.15 | 71.94 | 66.62 | 46.42 | 37.03 | 24.35 | 49.99 | |||||||||||||
| 2010 | 33.11 | 36.21 | 42.32 | 46.57 | 52.42 | 63.48 | 73.16 | 72.65 | 64.38 | 55.61 | 39.28 | 31.94 | 50.93 | |||||||||||||
| 2011 | 29.77 | a | 34.94 | b | 42.52 | 46.86 | b | 54.52 | a | 63.72 | 72.53 | 75.88 | c | 67.75 | 53.42 | a | 37.57 | 30.78 | a | 50.85 | ||||||
| 2012 | 33.29 | 36.78 | 44.98 | a | 53.65 | c | 57.58 | a | 65.17 | 78.21 | 75.98 | a | 65.77 | 50.94 | 41.97 | 36.27 | 53.38 | |||||||||
| 2013 | 20.18 | 36.88 | 43.71 | 53.75 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.00 | z | 33.59 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 30.67 | 36.62 | 44.12 | 51.18 | 59.14 | 66.27 | 74.02 | 72.38 | 63.97 | 53.11 | 40.04 | 32.64 | 52.01 | |||||||||||||
| S.D. | 5.11 | 3.68 | 2.61 | 2.88 | 2.67 | 2.78 | 2.72 | 2.58 | 2.90 | 2.66 | 3.05 | 4.13 | 1.42 | |||||||||||||
| SKEW | -0.72 | -0.55 | 0.12 | -0.15 | 0.18 | 0.53 | 0.15 | -0.01 | -0.11 | 0.41 | -0.31 | -1.17 | -0.57 | |||||||||||||
| MAX | 42.34 | 44.62 | 49.68 | 56.75 | 65.84 | 73.78 | 80.82 | 77.97 | 69.92 | 61.15 | 46.60 | 39.65 | 54.70 | |||||||||||||
| MIN | 14.87 | 23.21 | 38.24 | 43.88 | 52.42 | 61.78 | 65.87 | 66.00 | 57.17 | 46.42 | 31.53 | 15.76 | 47.85 | |||||||||||||
| NO YRS | 74 | 78 | 78 | 77 | 75 | 76 | 78 | 77 | 78 | 76 | 76 | 78 | 67 | |||||||||||||