| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 93.32 | f | 91.52 | h | 85.40 | j | 72.00 | j | 58.30 | g | 44.80 | f | 9999.00 | |
| 1949 | 43.17 | g | 49.80 | c | 55.59 | d | 73.67 | f | 76.27 | i | 90.14 | h | 94.44 | m | 89.54 | g | 90.00 | j | 72.57 | j | 68.38 | n | 49.88 | f | 52.70 | |
| 1950 | 45.43 | c | 55.05 | f | 58.57 | h | 69.65 | d | 75.79 | g | 85.31 | d | 97.69 | b | 95.19 | e | 85.08 | f | 74.62 | b | 62.82 | b | 54.15 | d | 73.11 | |
| 1951 | 49.67 | a | 53.04 | c | 59.71 | c | 67.83 | g | 75.75 | c | 85.77 | d | 94.12 | e | 92.64 | f | 91.15 | j | 71.72 | f | 59.08 | e | 47.93 | d | 65.63 | |
| 1952 | 45.84 | 53.86 | 55.45 | 67.67 | 78.90 | 78.67 | 94.94 | 93.52 | 86.53 | 80.03 | 59.53 | 50.48 | 70.45 | |||||||||||||
| 1953 | 54.45 | 58.46 | 57.45 | 65.17 | 66.61 | 76.83 | 96.19 | 88.42 | 88.20 | 72.55 | 61.13 | 54.19 | 69.97 | |||||||||||||
| 1954 | 51.68 | 59.82 | 55.55 | 69.80 | 77.39 | 81.50 | 94.81 | 87.23 | 82.80 | 72.94 | 61.40 | 50.42 | 70.44 | |||||||||||||
| 1955 | 46.84 | 53.07 | 60.00 | 59.07 | 72.29 | 81.17 | 86.68 | 93.32 | 85.53 | 75.55 | 57.53 | 51.81 | 68.57 | |||||||||||||
| 1956 | 49.97 | 51.00 | 60.87 | 63.83 | 73.26 | 84.07 | 91.58 | 88.42 | 85.40 | 68.26 | 61.90 | 54.29 | 69.40 | |||||||||||||
| 1957 | 46.61 | 54.71 | 58.68 | 65.20 | 69.35 | 87.23 | 92.84 | 90.48 | 85.13 | 66.26 | 56.93 | 53.26 | 68.89 | |||||||||||||
| 1958 | 52.19 | 55.96 | 53.16 | 65.40 | 77.65 | 81.13 | 91.32 | 96.42 | 87.17 | 79.35 | 61.13 | 60.65 | 71.79 | |||||||||||||
| 1959 | 52.55 | 51.68 | 65.52 | 74.33 | 73.39 | 89.10 | 97.58 | 92.68 | 81.23 | 75.48 | 65.37 | 55.58 | 72.87 | |||||||||||||
| 1960 | 48.55 | 52.90 | 62.13 | 67.07 | 72.65 | 92.60 | 97.55 | 93.23 | 88.37 | 71.97 | 56.80 | 51.68 | 71.29 | |||||||||||||
| 1961 | 54.45 | 55.36 | 57.39 | 67.77 | 70.00 | 90.57 | 96.10 | 91.97 | 82.90 | 73.97 | 59.57 | 49.58 | 70.80 | |||||||||||||
| 1962 | 53.29 | 52.64 | 55.74 | 71.83 | 70.90 | 85.47 | 92.32 | 89.52 | 86.03 | 70.00 | 62.33 | 55.52 | 70.47 | |||||||||||||
| 1963 | 50.58 | 61.89 | 56.97 | 56.73 | 70.32 | 79.90 | 87.45 | 89.48 | 85.43 | 70.90 | 56.67 | 53.26 | 68.30 | |||||||||||||
| 1964 | 49.65 | 57.59 | 57.39 | 65.27 | 69.13 | 78.63 | 90.68 | 90.74 | 81.53 | 78.29 | 54.30 | 50.97 | 68.68 | |||||||||||||
| 1965 | 51.32 | 57.25 | 59.26 | 61.73 | 72.61 | 77.27 | 88.97 | 88.03 | 78.20 | 77.94 | 59.10 | 50.97 | 68.55 | |||||||||||||
| 1966 | 51.68 | 52.93 | 61.00 | 72.27 | 77.87 | 83.27 | 86.90 | 92.45 | 82.77 | 74.16 | 61.40 | 51.03 | 70.64 | |||||||||||||
| 1967 | 52.65 | 57.29 | 56.03 | 50.80 | 73.94 | 78.40 | 94.48 | 95.97 | 87.17 | 74.23 | 63.83 | 48.77 | 69.46 | |||||||||||||
| 1968 | 50.81 | 58.59 | 62.00 | 67.57 | 72.94 | 85.63 | 92.06 | 83.90 | 84.57 | 71.06 | 57.30 | 48.19 | 69.55 | |||||||||||||
| 1969 | 49.55 | 47.79 | 59.06 | 64.00 | 76.52 | 78.60 | 92.39 | 93.58 | 86.57 | 67.16 | 62.27 | 53.42 | 69.24 | |||||||||||||
| 1970 | 51.97 | 59.64 | 60.87 | 61.93 | 77.32 | 83.23 | 93.58 | 91.52 | 84.73 | 71.42 | 60.40 | 47.48 | 70.34 | |||||||||||||
| 1971 | 51.61 | 56.04 | 57.97 | 62.03 | 67.10 | 79.80 | 92.29 | 92.87 | 84.37 | 69.19 | 58.00 | 45.71 | 68.08 | |||||||||||||
| 1972 | 48.42 | 56.76 | 65.35 | 64.00 | 75.23 | 85.50 | 92.06 | 90.35 | 80.20 | 68.32 | 53.73 | 46.87 | 68.90 | |||||||||||||
| 1973 | 48.48 | 55.71 | 54.19 | 67.93 | 78.81 | 86.00 | 91.03 | 89.77 | 82.23 | 70.71 | 53.83 | 52.00 | 69.23 | |||||||||||||
| 1974 | 50.19 | 53.36 | 58.00 | 62.43 | 74.90 | 84.83 | 87.90 | 91.00 | 89.17 | 76.97 | 59.87 | 52.26 | 70.07 | |||||||||||||
| 1975 | 54.97 | 53.64 | 54.87 | 57.50 | 75.00 | 83.43 | 88.32 | 86.77 | 88.50 | 68.87 | 57.60 | 55.06 | 68.71 | |||||||||||||
| 1976 | 54.87 | 56.83 | 58.84 | 62.63 | 79.90 | 83.37 | 90.81 | 81.42 | 82.40 | 76.19 | 65.90 | 58.71 | 70.99 | |||||||||||||
| 1977 | 52.16 | 61.04 | 57.19 | 72.27 | 64.71 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.73 | 56.03 | 60.73 | ||||||||
| 1978 | ----- | z | 55.38 | b | 63.17 | a | ----- | z | 74.43 | a | 82.97 | 90.93 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.38 | ||
| 1979 | 49.10 | a | 52.11 | 57.48 | 63.03 | 76.13 | 81.53 | 85.97 | a | 86.03 | 88.28 | a | 73.38 | b | 57.93 | a | 58.27 | a | 69.10 | |||||||
| 1980 | 53.73 | a | 58.59 | 57.87 | 66.32 | b | 69.82 | c | 75.69 | d | 87.90 | b | 87.48 | ----- | z | 72.70 | a | 62.67 | c | 58.53 | a | 68.30 | ||||
| 1981 | ----- | z | 59.00 | a | 57.16 | 68.10 | 75.29 | 89.97 | 93.28 | m | 93.35 | 87.93 | 69.35 | 62.13 | 52.85 | e | 71.51 | |||||||||
| 1982 | 48.16 | 56.32 | 54.61 | 61.43 | 75.81 | 78.50 | 86.94 | 89.10 | 79.23 | 69.23 | 55.07 | c | 52.81 | 67.27 | ||||||||||||
| 1983 | 53.81 | 55.62 | b | 57.10 | 60.67 | 74.55 | 73.17 | a | 83.74 | h | 91.21 | b | 88.53 | 77.52 | 57.97 | 54.26 | 67.67 | |||||||||
| 1984 | 60.06 | 59.00 | 65.45 | 65.17 | 80.19 | 86.20 | 97.87 | 94.84 | 92.67 | 71.06 | 59.40 | 55.19 | 73.93 | |||||||||||||
| 1985 | 59.03 | 64.04 | 59.13 | 74.07 | 76.52 | 91.63 | 97.13 | 90.58 | 79.10 | 76.42 | 59.13 | 61.23 | 74.00 | |||||||||||||
| 1986 | 63.55 | 60.86 | 67.29 | 69.83 | 77.87 | 87.93 | 92.10 | 96.39 | 79.13 | 77.42 | 71.00 | 58.10 | 75.12 | |||||||||||||
| 1987 | 56.00 | 61.71 | 62.58 | 77.50 | 80.55 | 89.20 | ----- | z | 93.77 | 90.27 | 83.81 | 62.90 | 52.61 | 73.72 | ||||||||||||
| 1988 | 56.58 | 66.86 | 68.00 | 69.70 | 75.06 | 85.90 | 98.55 | 94.23 | 90.93 | 84.13 | 60.13 | 57.23 | 75.61 | |||||||||||||
| 1989 | 54.58 | 54.71 | 60.97 | 73.27 | 75.45 | 84.10 | 92.65 | 88.13 | 81.77 | 72.81 | 67.43 | 60.94 | 72.23 | |||||||||||||
| 1990 | 56.52 | 55.00 | 64.52 | 71.13 | 72.68 | 84.60 | 93.74 | 90.55 | 86.03 | 79.87 | 64.83 | 51.84 | 72.61 | |||||||||||||
| 1991 | 58.00 | 66.64 | 54.00 | 64.53 | 70.10 | 81.20 | ----- | z | 88.35 | 90.70 | 82.32 | 66.13 | 58.10 | 70.92 | ||||||||||||
| 1992 | 57.74 | 60.31 | 62.29 | 71.97 | 83.26 | 86.53 | m | 89.26 | 94.58 | 87.30 | 78.35 | 63.07 | 52.68 | 72.80 | ||||||||||||
| 1993 | 53.42 | 55.50 | 63.90 | 66.43 | 74.94 | 82.10 | 89.26 | 89.97 | 87.90 | 78.19 | 65.77 | 56.48 | 71.99 | |||||||||||||
| 1994 | 59.58 | 55.79 | 67.16 | 68.83 | 73.13 | 86.73 | 93.94 | 93.32 | 86.13 | 74.87 | 53.63 | 53.29 | 72.20 | |||||||||||||
| 1995 | 53.48 | 64.82 | 57.77 | 64.87 | 69.55 | 80.03 | 89.81 | 92.90 | 88.53 | 80.68 | 71.67 | 56.97 | 72.59 | |||||||||||||
| 1996 | 56.39 | 60.79 | 64.00 | 69.60 | 75.39 | 85.27 | 96.52 | 96.19 | 86.07 | 74.13 | 62.37 | 55.10 | 73.48 | |||||||||||||
| 1997 | 55.03 | 60.57 | 68.19 | 70.37 | 82.61 | 83.77 | 91.61 | 90.58 | 87.33 | 74.29 | 63.43 | 55.55 | 73.61 | |||||||||||||
| 1998 | 55.45 | 52.71 | 61.29 | 62.27 | 64.65 | 77.97 | 92.81 | 95.94 | 85.20 | 73.94 | 60.50 | 54.06 | 69.73 | |||||||||||||
| 1999 | 57.58 | 56.00 | 59.61 | 65.77 | 75.61 | 83.77 | 91.26 | 88.41 | b | 89.40 | 81.92 | e | 67.43 | 59.39 | 73.01 | |||||||||||
| 2000 | 56.58 | 58.03 | 63.94 | 71.43 | 76.58 | 89.10 | 89.55 | 92.42 | 84.87 | 73.16 | 57.77 | 61.10 | k | 73.95 | ||||||||||||
| 2001 | 56.32 | 56.14 | 65.84 | ----- | z | 86.29 | 88.77 | 91.39 | 93.61 | 87.70 | 81.19 | 64.00 | k | 53.55 | k | 78.58 | ||||||||||
| 2002 | 53.35 | h | 62.38 | g | 62.42 | 68.78 | g | 75.52 | 88.17 | 95.42 | 91.65 | 90.58 | k | 75.90 | 67.37 | 56.10 | 76.57 | |||||||||
| 2003 | 62.10 | 58.71 | 64.55 | 58.80 | 74.84 | 87.23 | 97.19 | 90.23 | 90.43 | g | 83.29 | 58.93 | 54.45 | 71.85 | ||||||||||||
| 2004 | 53.45 | 54.79 | 70.74 | 71.60 | 76.71 | 86.07 | 93.74 | l | 92.24 | n | 84.05 | i | 72.38 | o | 59.38 | q | 55.90 | k | 68.89 | |||||||
| 2005 | 55.33 | p | 60.23 | f | 62.77 | 65.20 | 72.23 | 78.67 | 97.90 | 95.48 | 82.43 | 74.61 | 66.20 | 56.48 | 75.20 | |||||||||||
| 2006 | 56.03 | 61.54 | 52.55 | 62.93 | 79.77 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.56 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 53.26 | 56.91 | 60.22 | 66.24 | 74.64 | 83.66 | 92.45 | 91.30 | 85.51 | 74.83 | 61.06 | 53.90 | 70.81 | |||||||||||||
| S.D. | 4.05 | 4.01 | 4.25 | 5.06 | 4.33 | 4.32 | 3.44 | 3.25 | 3.41 | 4.51 | 4.16 | 3.65 | 2.07 | |||||||||||||
| SKEW | 0.24 | 0.38 | 0.35 | -0.37 | -0.04 | -0.15 | 0.04 | -0.58 | -0.31 | 0.24 | 0.37 | -0.07 | 0.56 | |||||||||||||
| MAX | 63.55 | 66.86 | 70.74 | 77.50 | 86.29 | 92.60 | 98.55 | 96.42 | 92.67 | 84.13 | 71.67 | 61.23 | 75.61 | |||||||||||||
| MIN | 45.43 | 47.79 | 52.55 | 50.80 | 64.65 | 73.17 | 85.97 | 81.42 | 78.20 | 66.26 | 53.63 | 45.71 | 67.27 | |||||||||||||
| NO YRS | 53 | 55 | 57 | 53 | 56 | 54 | 50 | 52 | 48 | 52 | 53 | 52 | 40 | |||||||||||||