| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.17 | 62.58 | 46.80 | 34.06 | 55.15 | |||||
| 1925 | 44.87 | 48.46 | 53.84 | 62.60 | 67.90 | 76.40 | 88.68 | f | 82.94 | 72.30 | 63.84 | 51.70 | 44.94 | 60.89 | ||||||||||||
| 1926 | 41.13 | ----- | z | ----- | z | 67.27 | 67.87 | 82.23 | 87.58 | 81.94 | 67.80 | 66.03 | 52.90 | 42.42 | 65.72 | |||||||||||
| 1927 | 36.39 | 45.21 | 50.10 | 58.07 | 63.65 | 76.70 | 85.84 | 83.10 | 67.50 | 64.10 | a | 52.78 | c | 36.00 | 59.95 | |||||||||||
| 1928 | 37.46 | c | 46.31 | 54.71 | 57.76 | a | 74.77 | 72.43 | 88.39 | 84.16 | 75.97 | 63.39 | 49.75 | b | 42.48 | 62.30 | ||||||||||
| 1929 | 34.90 | 34.75 | 53.27 | a | 55.30 | 68.26 | 75.20 | 85.81 | 89.13 | 75.13 | 69.81 | 57.63 | 47.35 | 62.21 | ||||||||||||
| 1930 | 24.00 | 50.68 | 54.13 | 66.10 | 64.71 | 75.00 | 86.90 | 86.48 | 74.33 | 59.65 | 49.87 | 38.84 | 60.89 | |||||||||||||
| 1931 | 45.35 | 44.85 | a | 48.52 | 56.81 | d | 74.87 | 74.30 | 88.06 | 86.81 | 73.37 | 63.97 | 45.47 | 39.94 | 61.86 | |||||||||||
| 1932 | 41.16 | 41.86 | 50.52 | 59.53 | 65.00 | 79.13 | 81.03 | 82.13 | 78.33 | 65.10 | 54.40 | 37.39 | 61.30 | |||||||||||||
| 1933 | 41.45 | 40.71 | 52.90 | 60.97 | 61.77 | 76.33 | 88.37 | a | 86.58 | 71.10 | 70.42 | 55.17 | 49.45 | 62.94 | ||||||||||||
| 1934 | 50.52 | 53.14 | 53.97 | 60.30 | ----- | z | 66.03 | ----- | z | 88.10 | 75.77 | 64.90 | 51.30 | 43.06 | 60.71 | |||||||||||
| 1935 | 41.81 | 48.04 | 51.80 | a | 58.70 | 72.48 | ----- | z | 87.23 | 86.26 | 82.97 | 64.19 | 48.30 | 39.74 | 61.96 | |||||||||||
| 1936 | 42.13 | 34.21 | 51.77 | 65.60 | 72.06 | 77.20 | 87.35 | 88.61 | 77.00 | 71.45 | 54.57 | 45.23 | 63.93 | |||||||||||||
| 1937 | 26.48 | 42.75 | 52.90 | 56.30 | 69.23 | 75.60 | 87.58 | 83.19 | 78.37 | 68.61 | 51.57 | 44.81 | 61.45 | |||||||||||||
| 1938 | 42.32 | 40.75 | 49.97 | 60.30 | 68.35 | 79.63 | 89.42 | 84.13 | 81.73 | 63.68 | 46.67 | 43.81 | 62.56 | |||||||||||||
| 1939 | 46.19 | 43.32 | 57.00 | 66.87 | 71.84 | 73.83 | 88.65 | 89.58 | 80.40 | 67.42 | 58.33 | 49.45 | 66.07 | |||||||||||||
| 1940 | 36.58 | 46.97 | 57.29 | 60.13 | 72.29 | 83.97 | 86.29 | 88.48 | 74.67 | 65.29 | 45.70 | 44.61 | 63.52 | |||||||||||||
| 1941 | 43.06 | 48.93 | 59.10 | 62.50 | 66.39 | 76.20 | 89.97 | 83.48 | 68.60 | 61.68 | 53.97 | a | 41.68 | 62.96 | ||||||||||||
| 1942 | 32.03 | a | 44.46 | 54.65 | 62.87 | 64.39 | 73.14 | a | 89.45 | 88.03 | 80.13 | 69.06 | 48.18 | b | 44.74 | 62.59 | ||||||||||
| 1943 | 34.00 | 47.57 | 51.84 | 63.30 | 65.37 | a | 71.20 | ----- | z | 81.17 | b | 83.29 | b | ----- | z | ----- | z | ----- | z | 62.22 | ||||||
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.48 | 81.77 | 74.60 | 65.94 | 49.83 | 38.00 | 65.44 | |||||||
| 1949 | 31.32 | 43.18 | 51.17 | a | 67.57 | 74.74 | 78.97 | 85.77 | 85.32 | 80.30 | 62.00 | 58.96 | b | 43.19 | 63.54 | |||||||||||
| 1950 | 31.71 | 44.00 | 50.23 | 59.37 | 68.29 | 74.57 | 87.97 | 86.97 | 80.70 | 62.90 | 51.23 | 48.87 | 62.23 | |||||||||||||
| 1951 | 40.13 | 45.96 | 49.84 | 66.40 | 69.19 | 79.87 | 88.32 | 85.23 | 80.24 | a | 60.32 | 49.19 | c | 39.61 | 62.86 | |||||||||||
| 1952 | 36.16 | 44.52 | 49.87 | 67.27 | 74.45 | b | 73.03 | 88.83 | a | 85.26 | 81.07 | c | 75.48 | 51.88 | d | 40.65 | 64.04 | |||||||||
| 1953 | 49.65 | 48.00 | a | 53.74 | 58.53 | 63.55 | b | 68.61 | b | 87.77 | 82.53 | a | 81.48 | a | 67.57 | a | 56.55 | a | 47.13 | 63.76 | ||||||
| 1954 | 41.71 | 50.79 | 49.65 | 59.60 | 70.03 | 70.03 | 83.87 | a | 77.45 | b | 72.20 | 60.63 | a | 55.03 | 43.68 | 61.22 | ||||||||||
| 1955 | 41.67 | a | 44.14 | 45.97 | 51.97 | 62.94 | 76.77 | 80.53 | a | 85.71 | 76.36 | b | 63.26 | 44.52 | a | 40.42 | 59.52 | |||||||||
| 1956 | 41.03 | a | 38.69 | 50.87 | 62.67 | 68.74 | 71.63 | 86.17 | a | 82.65 | 76.40 | 60.23 | a | 47.77 | 46.48 | 61.11 | ||||||||||
| 1957 | 29.84 | 44.75 | 48.97 | 59.17 | 68.81 | 76.47 | 81.68 | 79.71 | 78.07 | 55.97 | 48.93 | 48.26 | 60.05 | |||||||||||||
| 1958 | 44.23 | 52.54 | 49.39 | 57.20 | 75.19 | 77.97 | 88.87 | a | 90.19 | 74.14 | a | 69.10 | 50.60 | 47.74 | 64.76 | |||||||||||
| 1959 | 43.61 | 42.75 | 53.11 | d | 60.46 | b | 63.70 | a | 75.20 | 87.16 | 81.79 | b | 71.00 | e | 65.10 | 52.67 | 43.29 | 61.65 | ||||||||
| 1960 | 36.80 | a | 44.10 | 53.32 | 59.23 | 63.93 | a | 79.39 | b | 92.34 | b | 81.93 | b | 78.34 | a | 64.96 | c | 48.81 | c | 40.80 | a | 62.00 | ||||
| 1961 | 44.65 | 49.82 | 51.57 | a | 57.77 | 64.55 | 83.73 | 89.55 | b | 90.35 | 71.97 | 64.07 | c | 47.83 | a | 42.21 | b | 63.17 | ||||||||
| 1962 | 38.93 | b | 45.07 | a | 50.00 | f | 64.39 | b | 60.13 | 76.07 | 84.89 | c | 80.52 | b | 78.55 | a | 62.90 | b | 51.79 | b | 46.43 | c | 62.70 | |||
| 1963 | 38.68 | 53.29 | 52.65 | 53.24 | a | 67.97 | b | 72.96 | b | 80.28 | b | 83.76 | b | 81.48 | c | 65.47 | a | 50.28 | a | 41.65 | 61.81 | |||||
| 1964 | 42.84 | 48.93 | 50.07 | b | 57.55 | a | 67.17 | a | 73.90 | 85.45 | 81.39 | 75.59 | c | 65.97 | b | 44.50 | b | 39.16 | 61.04 | |||||||
| 1965 | 40.90 | 50.33 | a | 53.61 | 60.90 | 67.19 | 76.22 | c | 84.79 | b | 83.29 | c | 72.55 | a | 70.86 | b | 51.07 | a | 43.03 | a | 62.90 | |||||
| 1966 | 42.97 | 46.63 | a | 54.74 | 62.97 | 73.39 | 74.68 | b | 81.89 | c | 84.97 | 78.93 | a | 66.87 | a | 51.57 | 43.55 | 63.60 | ||||||||
| 1967 | 45.57 | a | 52.11 | 49.80 | a | 51.90 | a | 68.55 | 79.42 | d | 88.79 | c | 92.68 | 84.10 | a | 65.40 | a | 50.64 | b | 41.48 | 64.20 | |||||
| 1968 | 43.70 | a | 48.28 | 56.71 | 58.83 | 67.69 | b | 76.68 | e | 88.39 | c | 79.19 | 77.21 | b | 62.10 | a | 49.07 | c | 38.40 | a | 62.19 | |||||
| 1969 | 33.13 | 39.79 | 51.90 | 58.87 | 73.59 | b | 77.81 | c | 84.67 | d | 84.41 | b | 76.21 | a | 58.48 | 53.68 | b | 40.47 | a | 61.08 | ||||||
| 1970 | 41.55 | 46.93 | 51.45 | 53.43 | 69.93 | b | 81.76 | a | 88.37 | a | 88.40 | a | 71.25 | b | 62.00 | a | 49.10 | a | 41.16 | 62.11 | ||||||
| 1971 | 44.06 | 46.32 | 47.73 | a | 58.38 | a | 68.86 | c | 73.00 | c | 87.38 | b | 90.65 | 71.69 | d | 61.03 | b | 50.07 | 40.23 | a | 61.62 | |||||
| 1972 | 39.13 | a | 46.83 | 55.37 | a | 55.40 | 70.52 | d | 78.82 | b | 85.87 | a | 87.16 | 72.72 | e | 62.48 | b | 49.52 | c | 35.13 | a | 61.58 | ||||
| 1973 | 37.63 | a | 46.41 | a | 51.90 | 61.17 | a | 72.00 | 79.00 | d | 88.18 | c | 84.70 | a | 74.71 | f | 62.80 | a | 44.34 | a | 44.39 | 61.14 | ||||
| 1974 | 35.79 | b | 48.00 | 51.13 | 57.03 | 64.26 | 83.90 | a | 84.87 | a | 86.32 | 82.75 | b | 66.59 | b | 50.93 | a | 43.35 | 62.91 | |||||||
| 1975 | 42.94 | 43.54 | 46.77 | 52.34 | a | 67.40 | a | 74.31 | a | 86.68 | c | 79.67 | a | 80.07 | c | 59.59 | b | 49.85 | c | 44.00 | b | 60.60 | ||||
| 1976 | 45.55 | 45.48 | 49.55 | 56.41 | a | 69.86 | c | 73.37 | c | 85.89 | d | 77.17 | a | 78.46 | b | 66.83 | b | 53.62 | d | 45.67 | a | 62.32 | ||||
| 1977 | 39.48 | 50.11 | 50.71 | 67.33 | 60.86 | b | 81.56 | c | 83.97 | b | 87.68 | 69.92 | f | 63.72 | b | 47.03 | 40.87 | 61.21 | ||||||||
| 1978 | 40.97 | 47.39 | 56.32 | 55.86 | a | 63.23 | e | 77.20 | 84.10 | b | 79.87 | 70.73 | 67.77 | 43.47 | 37.55 | 60.37 | ||||||||||
| 1979 | 26.87 | 43.36 | 56.57 | c | 57.23 | 70.45 | 77.40 | 86.52 | 83.00 | f | 83.58 | r | ----- | z | ----- | z | ----- | z | 59.77 | |||||||
| 1980 | 24.67 | v | 42.41 | 49.45 | 60.57 | 64.81 | 68.47 | 84.26 | 80.48 | 75.83 | 63.00 | 48.17 | 45.17 | a | 62.06 | |||||||||||
| 1981 | 38.77 | 44.07 | 52.23 | 57.87 | 65.45 | 70.83 | 81.55 | 88.55 | 76.07 | 58.81 | 50.77 | 40.90 | 60.49 | |||||||||||||
| 1982 | 36.45 | 43.11 | 50.42 | 55.60 | 65.71 | 76.30 | 81.65 | 84.23 | 70.47 | 57.90 | 43.77 | 38.97 | 58.71 | |||||||||||||
| 1983 | 45.55 | 48.64 | 53.81 | 57.07 | 68.90 | 70.70 | 75.52 | 83.55 | 70.53 | 63.68 | 49.00 | 29.48 | 59.70 | |||||||||||||
| 1984 | 41.03 | 46.45 | 52.39 | 52.93 | 62.16 | 69.10 | 84.58 | 84.13 | 71.10 | 55.81 | 45.10 | 35.61 | 58.37 | |||||||||||||
| 1985 | 32.97 | 41.29 | 49.94 | 61.97 | 67.35 | 75.40 | 89.71 | 79.77 | 65.93 | 60.16 | 35.67 | 29.58 | 57.48 | |||||||||||||
| 1986 | 43.23 | 43.86 | 56.94 | 56.03 | 66.77 | a | 81.57 | 77.65 | 88.35 | 66.97 | 64.55 | 47.43 | 38.32 | 60.97 | ||||||||||||
| 1987 | 37.94 | 46.21 | 50.87 | 66.34 | a | 70.32 | 78.60 | 79.48 | 82.55 | 80.10 | 70.77 | 49.63 | 37.52 | 62.53 | ||||||||||||
| 1988 | 37.77 | 49.31 | 52.10 | 60.53 | 65.06 | 71.70 | 84.71 | 83.87 | 75.40 | 72.58 | 47.00 | 41.42 | 61.79 | |||||||||||||
| 1989 | 42.65 | 33.68 | 49.10 | 61.77 | 63.94 | 75.73 | 82.42 | 78.71 | 75.63 | 61.32 | 52.40 | 44.74 | 60.17 | |||||||||||||
| 1990 | 42.55 | 44.75 | 54.06 | 65.27 | 63.68 | 74.10 | 86.71 | 84.48 | 81.23 | 61.23 | 51.10 | 33.52 | 61.89 | |||||||||||||
| 1991 | 40.48 | 53.14 | 48.35 | 56.27 | 61.13 | 67.67 | 84.84 | 86.65 | 79.57 | 65.29 | 47.13 | 40.58 | 60.92 | |||||||||||||
| 1992 | 43.39 | 49.76 | 57.48 | 60.37 | 72.71 | 81.67 | 82.29 | 86.55 | 74.13 | 65.23 | 45.77 | 36.00 | 62.94 | |||||||||||||
| 1993 | 30.68 | 35.00 | 50.77 | 55.40 | 70.81 | 69.80 | 72.90 | 78.77 | 77.43 | 65.68 | 44.07 | 39.90 | 57.60 | |||||||||||||
| 1994 | 47.16 | 42.68 | 56.23 | 60.60 | 67.90 | 73.83 | 88.58 | 84.58 | 79.63 | 60.87 | 42.33 | 41.65 | 62.17 | |||||||||||||
| 1995 | 39.74 | 49.50 | 50.77 | 55.73 | 66.13 | 71.07 | 81.35 | 79.29 | 77.47 | 59.65 | 52.03 | 39.10 | 60.15 | |||||||||||||
| 1996 | 41.45 | 40.62 | 50.68 | 58.27 | 61.03 | 73.93 | 86.77 | 85.42 | 71.57 | 60.58 | 48.57 | 40.81 | 59.97 | |||||||||||||
| 1997 | 40.74 | 42.68 | 53.00 | 55.80 | 70.74 | 71.77 | 81.23 | 84.45 | 74.37 | 59.74 | 48.80 | 40.58 | 60.32 | |||||||||||||
| 1998 | 43.42 | 46.64 | 52.10 | 55.73 | 60.39 | 71.93 | 88.65 | 86.58 | 80.17 | 60.35 | 47.73 | 40.10 | 61.15 | |||||||||||||
| 1999 | 43.84 | 44.96 | 49.84 | 54.80 | 63.23 | 72.30 | 82.19 | 83.65 | 75.47 | 63.77 | 53.50 | 41.10 | 60.72 | |||||||||||||
| 2000 | 36.71 | 43.52 | 50.32 | 61.73 | 65.68 | 76.83 | 82.94 | ----- | z | 72.90 | 58.71 | 39.23 | 37.94 | 56.96 | ||||||||||||
| 2001 | 38.97 | 41.07 | 53.03 | 54.27 | ----- | z | ----- | z | 83.57 | a | 88.00 | d | 79.07 | ----- | z | ----- | z | ----- | z | 62.57 | ||||||
| 2002 | 40.13 | 47.93 | 46.61 | 59.07 | 65.23 | 77.83 | 89.97 | 82.23 | 77.10 | ----- | z | 52.87 | 41.77 | 61.88 | ||||||||||||
| 2003 | 45.74 | 45.79 | 53.19 | 53.80 | 64.81 | 79.33 | 90.68 | 85.32 | 80.75 | f | 67.03 | 43.17 | 41.97 | 60.98 | ||||||||||||
| 2004 | 35.71 | 43.88 | e | 57.72 | f | 59.84 | e | 64.25 | c | 74.00 | d | 87.26 | 84.96 | e | 70.87 | 60.97 | 47.73 | 42.19 | 61.06 | |||||||
| 2005 | 40.93 | d | ----- | z | 52.77 | 55.10 | 65.38 | e | 70.37 | 85.45 | 85.68 | ----- | z | 60.68 | 43.67 | ----- | z | 62.22 | ||||||||
| 2006 | 43.35 | 41.18 | ----- | z | ----- | z | 68.77 | ----- | z | 89.52 | 84.68 | 77.40 | ----- | z | 50.17 | f | 40.68 | 63.65 | ||||||||
| 2007 | ----- | z | 47.79 | d | 57.36 | i | 57.32 | h | 71.57 | h | 76.15 | c | 89.80 | a | 83.47 | a | 74.39 | g | 61.71 | n | 49.04 | e | 41.95 | i | 69.25 | |
| 2008 | 38.83 | g | 49.62 | p | 48.58 | g | 53.87 | g | 68.96 | h | 78.53 | o | 89.00 | m | 85.00 | p | 79.30 | 64.57 | a | 54.64 | h | 37.74 | 60.54 | |||
| 2009 | 39.88 | f | 46.67 | g | 46.58 | g | 58.83 | g | ----- | z | 76.90 | 92.45 | 86.29 | ----- | z | 56.42 | 49.63 | 35.94 | 66.27 | |||||||
| 2010 | 45.06 | 46.93 | 53.16 | 54.80 | 60.00 | 69.63 | 83.94 | 82.81 | 73.77 | 63.55 | 46.30 | 42.23 | 60.18 | |||||||||||||
| 2011 | 44.94 | 41.36 | 48.81 | 51.10 | 60.23 | a | 70.37 | 80.52 | 87.20 | a | 82.20 | 63.86 | b | 48.62 | a | 46.90 | a | 60.51 | ||||||||
| 2012 | 46.61 | 44.00 | 50.03 | 58.37 | 65.86 | b | 70.63 | 86.47 | a | 89.23 | a | 82.82 | b | 64.84 | f | 51.46 | b | 41.50 | e | 62.45 | ||||||
| 2013 | 39.83 | b | 47.72 | c | 53.33 | a | 68.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.96 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.04 | 45.31 | 52.01 | 59.10 | 67.19 | 75.28 | 85.62 | 84.54 | 76.15 | 63.85 | 49.39 | 41.38 | 61.64 | |||||||||||||
| S.D. | 5.15 | 4.15 | 2.71 | 4.10 | 3.95 | 4.00 | 3.62 | 3.29 | 4.29 | 3.86 | 4.06 | 4.03 | 1.65 | |||||||||||||
| SKEW | -0.86 | -0.55 | 0.31 | 0.33 | 0.17 | 0.09 | -0.88 | -0.04 | -0.28 | 0.41 | -0.36 | -0.43 | -0.14 | |||||||||||||
| MAX | 50.52 | 53.29 | 59.10 | 67.57 | 75.19 | 83.97 | 92.45 | 92.68 | 84.10 | 75.48 | 58.96 | 49.45 | 66.07 | |||||||||||||
| MIN | 24.00 | 33.68 | 45.97 | 51.10 | 60.00 | 66.03 | 72.90 | 77.17 | 65.93 | 55.81 | 35.67 | 29.48 | 57.48 | |||||||||||||
| NO YRS | 80 | 80 | 77 | 79 | 78 | 79 | 80 | 81 | 78 | 78 | 80 | 80 | 62 | |||||||||||||