| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.58 | 47.58 | ||
| 1939 | 45.50 | z | 42.54 | 55.03 | 64.87 | 67.81 | 67.77 | 79.93 | a | 83.19 | 73.60 | 61.06 | 55.53 | 51.48 | 63.89 | |||||||||||
| 1940 | 49.00 | 49.48 | 56.97 | 61.47 | 72.35 | 78.07 | 78.03 | 83.19 | 71.60 | 62.29 | 48.37 | 49.06 | 63.32 | |||||||||||||
| 1941 | 48.61 | 54.54 | 61.65 | 61.57 | 64.26 | 69.00 | 81.65 | 75.42 | 65.40 | 59.71 | 53.70 | 46.67 | a | 61.85 | ||||||||||||
| 1942 | 44.03 | 46.46 | 52.55 | 59.43 | 62.19 | 67.07 | 78.74 | 81.03 | 76.47 | 64.52 | 49.60 | 46.45 | 60.71 | |||||||||||||
| 1943 | 40.39 | 52.00 | 51.29 | 60.60 | 61.90 | 67.20 | 76.94 | 73.81 | 77.83 | 60.29 | 53.23 | 44.94 | 60.03 | |||||||||||||
| 1944 | 46.84 | 46.45 | 52.58 | 55.93 | 64.81 | 69.20 | 79.29 | 79.29 | 77.67 | 67.58 | 50.27 | 44.87 | 61.23 | |||||||||||||
| 1945 | 46.45 | 48.14 | 47.71 | 54.03 | 65.19 | 70.80 | 80.97 | 80.16 | 71.00 | 62.65 | 47.13 | 46.23 | 60.04 | |||||||||||||
| 1946 | 44.39 | 46.61 | 50.68 | 57.37 | 69.52 | 66.83 | 77.61 | 79.03 | 70.60 | 55.06 | 48.60 | 45.06 | 59.28 | |||||||||||||
| 1947 | 40.74 | 54.11 | 56.97 | 60.80 | 71.06 | 67.33 | 74.48 | 74.35 | 74.20 | 59.10 | 49.70 | 47.13 | 60.83 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.81 | 73.61 | 72.63 | 61.00 | 47.23 | 40.40 | a | 61.95 | ||||||
| 1949 | 35.74 | 43.82 | 52.43 | a | 58.24 | a | 60.47 | a | 64.40 | ----- | z | 75.39 | 71.76 | a | 54.73 | a | 58.87 | 42.71 | 56.23 | |||||||
| 1950 | ----- | z | 49.73 | b | 48.39 | 56.73 | ----- | z | 71.37 | 82.52 | 83.10 | 76.77 | 59.19 | 51.70 | 52.63 | a | 63.21 | |||||||||
| 1951 | 44.03 | 48.46 | 47.35 | 66.40 | 68.00 | a | 79.03 | a | 82.19 | 82.03 | 79.97 | 59.57 | a | 52.07 | 41.87 | 62.58 | ||||||||||
| 1952 | ----- | z | 54.65 | l | 50.10 | a | 63.52 | a | 66.52 | 68.50 | 81.71 | 79.59 | b | 79.47 | 70.55 | 51.03 | 46.32 | 65.73 | ||||||||
| 1953 | 49.03 | a | 48.71 | 50.74 | 57.00 | a | 61.32 | 63.80 | 78.35 | 77.19 | 75.80 | 64.55 | 53.93 | 48.48 | 60.74 | |||||||||||
| 1954 | 44.03 | 52.21 | 51.97 | 58.47 | 67.35 | 64.60 | 71.61 | 70.61 | 69.45 | a | 62.19 | 55.30 | 46.10 | 59.49 | ||||||||||||
| 1955 | 43.74 | 45.14 | 46.74 | 50.70 | 61.19 | 69.80 | 70.45 | 77.45 | 72.77 | 60.42 | 47.53 | 45.52 | 57.62 | |||||||||||||
| 1956 | 45.26 | 39.79 | 48.45 | 61.10 | 67.71 | 66.52 | a | 80.10 | 76.74 | 73.87 | 57.48 | 51.60 | 47.16 | 59.65 | ||||||||||||
| 1957 | 37.52 | 49.50 | 51.74 | 60.47 | 65.71 | 69.60 | 75.45 | 73.55 | 80.07 | 60.03 | 51.90 | 48.26 | 60.32 | |||||||||||||
| 1958 | 47.77 | 54.21 | 52.23 | 57.27 | 71.10 | 72.43 | 83.52 | 83.16 | 72.70 | 66.52 | 50.83 | 50.45 | 63.52 | |||||||||||||
| 1959 | 45.68 | 46.75 | 52.68 | 59.40 | 62.74 | 68.30 | 80.06 | 76.90 | 67.73 | 61.65 | 52.83 | 45.26 | 60.00 | |||||||||||||
| 1960 | 42.65 | 46.48 | 53.52 | 58.03 | 60.48 | 73.10 | 82.48 | 75.16 | 73.23 | 64.32 | 50.93 | 46.84 | 60.60 | |||||||||||||
| 1961 | 50.97 | 49.43 | 50.94 | 57.73 | 61.90 | 75.50 | 80.13 | 83.58 | 70.83 | 61.39 | 49.57 | 45.10 | 61.42 | |||||||||||||
| 1962 | 45.52 | 49.32 | 48.84 | 60.87 | 57.35 | 72.23 | 79.23 | 76.52 | 74.57 | 62.45 | 52.69 | d | 50.90 | k | 61.78 | |||||||||||
| 1963 | 42.14 | i | 55.78 | j | 52.78 | d | 53.00 | 68.16 | 67.47 | 72.13 | 77.68 | 78.10 | a | 62.71 | 50.20 | 47.26 | 62.95 | |||||||||
| 1964 | 44.42 | 50.17 | 49.65 | 56.23 | 62.97 | 67.87 | 77.32 | 74.74 | 71.87 | 66.77 | 48.69 | a | 43.39 | 59.51 | ||||||||||||
| 1965 | 44.42 | 49.11 | 59.00 | 61.50 | 63.42 | 72.13 | 84.03 | 79.06 | 73.96 | b | 68.16 | 54.07 | 43.64 | c | 62.71 | |||||||||||
| 1966 | 44.61 | 47.71 | 54.17 | a | 64.10 | a | 70.26 | 72.59 | a | 77.57 | a | 80.65 | 76.17 | 64.00 | 52.80 | 46.39 | 62.58 | |||||||||
| 1967 | 45.58 | 51.46 | 49.90 | 53.70 | 67.35 | 78.03 | 83.77 | a | 90.52 | 83.33 | 62.19 | 53.62 | a | 43.53 | a | 63.58 | ||||||||||
| 1968 | 45.37 | a | 57.34 | 56.52 | 58.23 | 65.26 | 72.87 | 80.00 | 74.61 | 73.27 | 60.80 | a | 51.67 | 42.32 | 61.52 | |||||||||||
| 1969 | 38.10 | 45.48 | a | 58.21 | b | 58.45 | a | 72.23 | a | 73.90 | 77.32 | 79.23 | 74.13 | 60.81 | 53.67 | 47.19 | 61.56 | |||||||||
| 1970 | 46.27 | a | 56.58 | b | 54.30 | a | 54.83 | a | 69.67 | d | 76.74 | c | 83.26 | 83.03 | 69.97 | 62.74 | 50.89 | b | 42.97 | a | 62.60 | |||||
| 1971 | 44.20 | a | 46.81 | b | 47.81 | 58.45 | a | 67.81 | 66.90 | 80.06 | 81.61 | 69.88 | e | 60.16 | 49.60 | 42.23 | 59.63 | |||||||||
| 1972 | 41.81 | 48.54 | a | 56.06 | 53.83 | 69.80 | a | 72.17 | 83.84 | 83.66 | b | 70.34 | a | 64.93 | a | 51.33 | 43.42 | 61.64 | ||||||||
| 1973 | 43.79 | b | 53.76 | c | 49.89 | d | 60.15 | d | 66.85 | e | 69.88 | d | 77.57 | c | 73.07 | c | 70.83 | 59.23 | a | 46.10 | 46.65 | 59.82 | ||||
| 1974 | 41.68 | 45.11 | a | 53.00 | 55.22 | c | 61.41 | b | 72.40 | 72.11 | d | 75.93 | a | 79.18 | b | 64.42 | 51.76 | a | 45.94 | 59.85 | ||||||
| 1975 | 45.21 | b | 46.42 | b | 48.71 | 51.71 | b | 64.60 | a | 67.34 | a | 73.87 | 69.66 | b | 75.72 | a | 55.79 | b | 47.28 | a | 45.66 | b | 57.66 | |||
| 1976 | 46.13 | 45.68 | a | 49.23 | a | 56.46 | b | 64.48 | b | 67.30 | g | 73.87 | a | 70.46 | c | 72.32 | e | 62.50 | g | 55.70 | j | 47.04 | e | 58.41 | ||
| 1977 | 47.07 | c | 51.42 | d | 48.67 | a | 62.41 | c | 57.59 | b | 71.70 | c | 74.19 | d | 80.32 | 64.70 | j | 60.93 | c | 47.09 | g | 47.57 | c | 60.19 | ||
| 1978 | 47.42 | 50.07 | 58.42 | e | 57.36 | e | 61.80 | f | 73.65 | j | 76.38 | b | 73.52 | 65.61 | b | 67.33 | a | 47.80 | e | 42.12 | n | 60.43 | ||||
| 1979 | 40.26 | h | 44.52 | a | 56.42 | 58.22 | g | ----- | z | 74.57 | i | 78.30 | a | 73.90 | 73.70 | g | 63.46 | c | 54.48 | i | 53.30 | d | 61.65 | |||
| 1980 | 42.61 | h | 52.15 | i | 49.33 | d | 62.76 | a | 62.48 | b | 64.88 | f | 76.66 | b | 74.39 | c | 74.28 | e | 68.87 | h | 54.00 | f | 46.52 | f | 66.65 | |
| 1981 | 49.93 | b | 50.58 | b | 53.74 | h | 58.11 | c | 61.88 | f | 66.15 | c | 75.46 | e | 80.36 | c | 75.04 | g | 59.42 | e | 53.91 | h | 45.29 | q | 62.86 | |
| 1982 | 41.35 | h | 47.18 | 51.48 | 55.23 | 66.84 | 71.23 | 73.48 | 76.93 | a | 70.87 | 61.94 | 48.07 | 44.70 | k | 62.33 | ||||||||||
| 1983 | 49.48 | 49.96 | 53.00 | 58.67 | 69.58 | 66.80 | 70.55 | 75.35 | 69.23 | 62.32 | 51.03 | 40.65 | 59.72 | |||||||||||||
| 1984 | 49.10 | 52.48 | 55.81 | 53.97 | a | 61.94 | 65.97 | 77.94 | 77.42 | 71.37 | 56.13 | 48.12 | n | 41.68 | 60.34 | |||||||||||
| 1985 | 43.81 | 45.79 | 49.97 | 60.67 | 63.84 | 73.87 | 84.35 | 78.74 | 68.20 | 59.81 | 41.50 | 43.35 | 59.49 | |||||||||||||
| 1986 | 52.06 | m | 48.54 | 59.84 | 57.53 | 65.19 | 74.83 | 73.45 | 83.15 | k | 65.95 | i | 61.71 | 48.77 | 42.61 | 59.16 | ||||||||||
| 1987 | 41.42 | 49.25 | 53.06 | 64.03 | 65.84 | 75.07 | 72.06 | 77.32 | 71.77 | 66.32 | 46.56 | n | 38.84 | 61.36 | ||||||||||||
| 1988 | 42.81 | 49.07 | 50.06 | 56.57 | 59.74 | 67.13 | 75.10 | 76.03 | 71.57 | 60.55 | 46.20 | 40.97 | 57.98 | |||||||||||||
| 1989 | 42.50 | k | 39.00 | 47.45 | 60.70 | 61.65 | 68.83 | 70.29 | 69.61 | 72.83 | 54.61 | m | 48.20 | 41.87 | 58.04 | |||||||||||
| 1990 | 43.32 | 40.86 | 51.95 | k | 58.65 | j | 59.93 | b | 64.87 | o | 79.26 | 76.13 | 71.67 | 54.90 | 47.80 | 35.58 | 56.61 | |||||||||
| 1991 | 41.23 | 53.14 | 47.71 | 52.17 | 56.68 | 63.70 | 78.71 | 76.35 | 74.73 | 62.84 | 49.13 | 44.48 | 58.41 | |||||||||||||
| 1992 | 44.81 | 52.21 | 56.81 | 58.12 | f | 72.94 | o | 78.85 | q | 80.62 | r | 79.14 | j | 65.95 | k | 59.45 | 47.10 | 39.77 | i | 52.07 | ||||||
| 1993 | 37.61 | 44.54 | 53.00 | j | 52.43 | 67.48 | j | 65.93 | 67.74 | 74.81 | 74.23 | 61.45 | 43.47 | 40.74 | 56.30 | |||||||||||
| 1994 | 44.74 | 43.07 | 54.24 | j | 56.63 | 66.74 | 67.47 | 79.48 | 74.33 | j | 72.80 | 56.42 | 41.33 | 42.13 | 57.08 | |||||||||||
| 1995 | 42.38 | w | 49.96 | 52.03 | 55.73 | 65.58 | 68.70 | 77.42 | 72.84 | 70.37 | 57.42 | 51.77 | 43.11 | m | 62.18 | |||||||||||
| 1996 | 41.94 | 45.10 | 51.68 | 54.62 | i | 59.52 | 70.00 | 81.23 | 78.03 | 66.67 | 56.65 | 47.07 | a | 44.00 | b | 58.35 | ||||||||||
| 1997 | 43.39 | 46.36 | 49.10 | 54.10 | 69.00 | 67.73 | 76.23 | 77.77 | 69.60 | 55.81 | 51.60 | 42.84 | 58.63 | |||||||||||||
| 1998 | 46.23 | 47.18 | 54.00 | 56.10 | 58.10 | 67.77 | 78.94 | 78.13 | 75.17 | 54.74 | 48.27 | 40.39 | 58.75 | |||||||||||||
| 1999 | 43.10 | 42.64 | 45.68 | 56.80 | 59.13 | 65.67 | 75.32 | 74.84 | 74.23 | 60.93 | d | 51.43 | 41.71 | j | 59.07 | |||||||||||
| 2000 | 40.55 | 45.93 | 49.29 | 61.17 | l | 61.06 | 72.20 | 75.74 | 75.94 | 69.83 | 57.23 | 43.53 | 42.74 | 57.64 | ||||||||||||
| 2001 | 44.48 | 45.61 | 52.77 | 51.50 | 68.84 | 66.20 | 74.10 | 75.65 | 71.37 | 56.81 | 48.67 | 42.03 | 58.17 | |||||||||||||
| 2002 | 40.06 | 45.79 | 46.23 | 55.30 | 58.55 | 68.07 | 76.19 | 76.94 | 71.73 | 58.00 | 51.37 | 45.39 | 57.80 | |||||||||||||
| 2003 | 48.90 | 47.25 | 50.81 | 51.93 | 63.13 | 72.80 | 81.06 | 79.32 | 73.40 | 60.77 | 46.90 | ----- | z | 61.48 | ||||||||||||
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.64 | i | 44.20 | 39.97 | 42.08 | |||
| 2006 | 43.39 | ----- | z | 44.48 | 54.93 | ----- | z | ----- | z | 76.32 | 74.61 | 67.38 | f | 55.77 | 45.27 | 40.52 | 54.41 | |||||||||
| 2007 | 38.97 | 43.79 | 50.88 | e | 53.53 | 62.52 | 63.91 | h | 74.48 | 71.29 | 65.93 | 53.03 | ----- | z | ----- | z | 57.16 | |||||||||
| 2008 | 36.61 | 44.38 | 43.90 | 48.17 | 60.19 | 64.30 | 75.39 | 71.90 | 69.30 | 55.32 | 49.10 | 37.87 | 54.70 | |||||||||||||
| 2009 | 40.42 | 44.11 | 43.16 | 52.93 | 63.77 | 66.50 | 78.74 | 74.06 | 70.00 | 54.65 | 46.37 | 37.58 | 56.02 | |||||||||||||
| 2010 | 45.39 | 47.36 | 48.77 | 51.37 | 55.42 | 61.80 | 74.39 | 73.84 | 65.67 | 56.06 | 43.93 | 42.26 | 55.52 | |||||||||||||
| 2011 | 41.81 | 39.64 | 44.52 | 46.67 | 53.32 | 62.43 | 68.06 | 72.45 | 71.43 | 54.29 | 44.13 | 38.87 | 53.14 | |||||||||||||
| 2012 | 44.10 | 42.41 | 43.19 | 53.43 | 60.39 | 54.90 | t | 70.93 | a | 76.97 | 73.47 | 58.24 | b | 48.44 | c | 39.96 | d | 55.59 | ||||||||
| 2013 | 37.97 | 43.93 | 47.14 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.95 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 43.94 | 47.66 | 51.33 | 57.12 | 64.09 | 69.45 | 77.24 | 77.01 | 72.67 | 60.46 | 49.51 | 44.26 | 59.86 | |||||||||||||
| S.D. | 3.44 | 3.92 | 4.07 | 4.04 | 4.32 | 3.91 | 3.96 | 3.91 | 3.67 | 3.83 | 3.43 | 3.57 | 2.32 | |||||||||||||
| SKEW | -0.29 | 0.15 | 0.23 | -0.06 | -0.13 | 0.45 | -0.26 | 0.62 | 0.37 | 0.24 | -0.14 | 0.14 | -0.74 | |||||||||||||
| MAX | 50.97 | 57.34 | 61.65 | 66.40 | 72.35 | 79.03 | 84.35 | 90.52 | 83.33 | 70.55 | 58.87 | 53.30 | 63.58 | |||||||||||||
| MIN | 35.74 | 39.00 | 43.16 | 46.67 | 53.32 | 61.80 | 67.74 | 69.61 | 65.40 | 53.03 | 41.33 | 35.58 | 53.14 | |||||||||||||
| NO YRS | 62 | 68 | 67 | 66 | 64 | 62 | 70 | 69 | 66 | 69 | 65 | 64 | 42 | |||||||||||||