| 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 | 72.30 | f | 69.46 | h | 63.97 | o | 55.55 | j | 44.80 | g | 36.32 | f | 9999.00 | |
| 1949 | 32.33 | g | 38.80 | c | 45.57 | d | 56.50 | f | 59.84 | i | 69.55 | h | 72.31 | m | 69.42 | g | 69.30 | j | 54.95 | j | 54.19 | n | 39.02 | f | 42.19 | |
| 1950 | 36.64 | c | 43.23 | f | 46.66 | i | 55.71 | d | 58.77 | g | 66.13 | d | 76.29 | c | 73.77 | e | 66.79 | p | 58.81 | b | 51.75 | b | 45.41 | d | 58.06 | |
| 1951 | 40.62 | a | 42.76 | c | 46.91 | c | 53.70 | g | 60.16 | c | 66.81 | d | 72.52 | e | 70.62 | k | 70.25 | j | 55.82 | f | 47.70 | e | 39.39 | d | 52.11 | |
| 1952 | 38.12 | a | 43.64 | 43.84 | 54.02 | 62.02 | 61.87 | 75.98 | 72.76 | 67.72 | 61.20 | a | 45.58 | 41.60 | 55.69 | |||||||||||
| 1953 | 44.55 | 44.54 | 46.29 | 53.73 | 54.95 | 61.73 | 74.53 | 69.27 | 69.88 | 56.84 | 49.00 | 42.44 | 55.65 | |||||||||||||
| 1954 | 41.63 | 46.04 | 45.06 | 56.82 | 60.87 | 63.95 | 74.56 | 67.63 | 63.23 | 55.44 | 48.00 | 40.50 | 55.31 | |||||||||||||
| 1955 | 36.65 | 40.68 | 46.42 | 46.78 | 57.48 | 64.32 | 68.73 | 72.79 | 66.68 | 57.82 | 46.07 | 44.61 | 54.09 | |||||||||||||
| 1956 | 42.84 | 39.57 | 47.15 | 51.18 | 59.35 | 66.17 | ----- | z | 69.05 | 66.88 | 54.73 | 47.00 | 41.15 | 53.19 | ||||||||||||
| 1957 | 36.65 | 45.98 | 47.76 | 51.75 | 57.06 | 68.80 | 72.60 | 68.95 | 66.70 | 54.02 | 45.10 | 42.13 | 54.79 | |||||||||||||
| 1958 | 41.45 | 47.23 | 43.76 | 50.92 | 61.92 | 65.72 | 73.21 | 76.87 | 68.83 | 61.61 | 48.03 | 47.16 | 57.23 | |||||||||||||
| 1959 | 42.65 | 41.86 | 50.82 | 57.48 | 57.69 | 69.67 | 77.27 | 72.66 | 64.98 | 59.31 | 48.93 | 42.39 | 57.14 | |||||||||||||
| 1960 | 40.00 | 42.53 | 50.66 | 52.78 | 57.53 | 72.95 | 77.37 | 72.40 | 69.00 | 56.37 | 46.25 | 40.84 | 56.56 | |||||||||||||
| 1961 | 42.34 | 44.96 | 46.76 | 53.73 | 55.40 | 71.88 | 76.23 | 76.27 | 64.88 | 58.26 | 46.62 | 40.23 | 56.46 | |||||||||||||
| 1962 | 41.08 | 43.96 | 44.52 | 56.57 | 56.87 | 67.90 | 73.82 | 71.40 | 68.45 | 57.29 | 50.47 | 44.63 | 56.41 | |||||||||||||
| 1963 | 38.52 | 50.82 | 45.61 | 47.73 | 58.77 | 65.07 | 69.68 | 71.31 | 69.48 | 58.18 | 46.97 | 42.11 | 55.35 | |||||||||||||
| 1964 | 39.87 | 43.47 | 45.05 | 50.73 | 55.23 | 63.88 | 72.29 | 72.39 | 63.80 | 61.53 | 43.80 | 43.65 | 54.64 | |||||||||||||
| 1965 | 41.68 | 43.43 | 46.87 | 50.97 | 57.69 | 61.97 | 70.87 | 71.39 | 61.47 | 59.74 | 47.83 | 38.95 | 54.40 | |||||||||||||
| 1966 | 39.48 | 40.66 | 48.06 | 56.63 | 61.39 | 66.72 | 68.35 | 73.56 | 66.20 | 57.95 | 50.25 | 42.27 | 55.96 | |||||||||||||
| 1967 | 42.55 | 44.80 | 45.76 | 42.57 | 59.13 | 64.90 | 76.48 | 78.60 | 71.08 | 58.69 | 52.00 | 38.66 | 56.27 | |||||||||||||
| 1968 | 40.16 | 48.48 | 49.56 | 53.22 | 58.58 | 68.88 | 74.82 | 68.19 | 67.25 | 56.65 | 47.13 | 38.79 | 55.98 | |||||||||||||
| 1969 | 41.35 | 39.93 | 46.73 | 51.38 | 61.48 | 64.88 | 74.65 | 74.06 | 69.35 | 53.47 | 49.00 | 43.65 | 55.83 | |||||||||||||
| 1970 | 44.26 | 48.09 | 48.50 | 48.37 | 61.73 | 68.37 | 75.87 | 72.98 | 66.87 | 57.06 | 50.08 | 39.82 | 56.83 | |||||||||||||
| 1971 | 41.81 | 43.66 | 46.69 | 49.83 | 55.48 | 64.28 | 75.13 | 75.24 | 67.80 | 54.50 | 46.40 | 37.76 | 54.88 | |||||||||||||
| 1972 | 38.42 | 45.84 | 52.45 | 51.62 | 60.44 | 69.38 | 74.06 | 72.95 | 64.23 | 56.73 | 44.80 | 37.56 | 55.71 | |||||||||||||
| 1973 | 39.61 | 46.41 | 44.55 | 54.07 | 63.92 | 70.13 | 74.19 | 72.29 | 65.87 | 56.40 | 46.17 | 43.40 | 56.42 | |||||||||||||
| 1974 | 41.85 | 42.25 | 48.18 | 50.27 | 59.61 | 68.93 | 72.31 | 73.90 | 71.00 | 61.79 | 48.23 | 41.82 | 56.68 | |||||||||||||
| 1975 | 43.06 | 44.36 | 45.94 | 46.97 | 60.42 | 67.63 | 71.73 | 70.63 | 71.62 | 55.45 | 46.43 | 43.37 | 55.63 | |||||||||||||
| 1976 | 42.29 | 45.60 | 46.38 | a | 49.90 | 63.15 | 66.00 | 73.02 | 66.29 | 66.58 | 59.89 | 51.85 | 43.63 | 56.21 | ||||||||||||
| 1977 | 41.23 | 47.18 | 44.42 | 56.37 | 52.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.63 | 46.34 | 48.15 | ||||||||
| 1978 | ----- | z | 45.46 | c | 52.29 | b | ----- | z | 59.61 | c | 66.17 | 73.47 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.40 | ||
| 1979 | 39.15 | a | 41.39 | a | 47.65 | a | 51.22 | 61.27 | 65.95 | 70.42 | a | 70.21 | 70.03 | a | 59.21 | b | 46.86 | a | 45.32 | a | 55.72 | |||||
| 1980 | 44.98 | a | 47.62 | 46.03 | 53.64 | b | 57.33 | d | 62.29 | f | 72.38 | b | 70.94 | ----- | z | 58.40 | a | 49.42 | d | 45.82 | a | 54.66 | ||||
| 1981 | ----- | z | 46.91 | a | 46.90 | 54.83 | 61.16 | 73.23 | 75.39 | m | 74.26 | 70.43 | 54.37 | 50.48 | 44.90 | e | 57.75 | |||||||||
| 1982 | 38.42 | 45.48 | 45.74 | 50.42 | 60.89 | 64.03 | 70.07 | a | 71.16 | 62.73 | 54.39 | 43.00 | c | 40.40 | 53.89 | |||||||||||
| 1983 | 41.24 | 44.08 | b | 46.53 | 47.40 | 57.55 | a | 60.12 | a | 65.93 | h | 74.69 | b | 72.02 | 61.40 | 47.97 | 46.53 | 54.50 | ||||||||
| 1984 | 47.10 | 46.50 | 52.37 | 51.55 | 64.37 | 69.15 | 78.77 | 75.71 | 73.60 | 55.85 | 46.30 | 41.73 | 58.58 | |||||||||||||
| 1985 | 41.84 | 47.59 | 44.53 | 57.22 | 58.68 | 71.73 | 78.76 | 73.27 | 63.23 | 59.77 | 46.20 | 46.21 | 57.42 | |||||||||||||
| 1986 | 50.23 | 49.55 | 54.03 | 54.82 | 60.11 | 68.97 | 72.87 | 75.31 | 63.13 | 60.92 | 53.83 | 46.08 | 59.15 | |||||||||||||
| 1987 | 43.34 | 48.62 | 52.02 | 61.20 | 65.47 | 71.55 | ----- | z | 74.84 | 70.95 | 66.82 | 50.38 | 43.10 | 58.94 | ||||||||||||
| 1988 | 45.90 | 50.98 | 52.19 | 56.27 | 59.76 | 69.18 | 80.00 | 75.84 | 72.08 | 65.92 | 50.20 | 44.95 | 60.27 | |||||||||||||
| 1989 | 42.39 | 44.68 | 51.71 | 60.37 | 61.84 | 69.25 | 76.10 | 72.05 | 67.35 | 59.65 | 53.05 | 47.18 | 58.80 | |||||||||||||
| 1990 | 44.69 | 43.39 | 51.92 | 58.72 | 59.60 | 67.97 | 76.55 | 74.81 | 70.75 | 65.60 | 51.02 | 40.61 | 58.80 | |||||||||||||
| 1991 | 45.50 | 53.95 | 45.39 | 53.00 | 57.79 | 66.52 | ----- | z | 71.79 | 76.37 | 68.77 | 53.83 | 46.84 | 58.16 | ||||||||||||
| 1992 | 45.08 | 51.03 | 52.76 | 59.12 | 68.65 | 71.62 | m | 74.23 | 78.60 | 70.80 | 63.84 | 50.65 | 41.98 | 59.70 | ||||||||||||
| 1993 | 43.45 | 45.86 | 53.55 | 54.47 | 61.00 | 67.45 | 73.27 | 74.29 | 72.33 | 64.42 | 52.37 | 45.52 | 59.00 | |||||||||||||
| 1994 | 47.71 | 45.86 | 54.11 | 56.10 | 60.53 | 70.55 | 78.02 | 77.08 | 70.72 | 60.48 | 43.80 | 43.95 | 59.08 | |||||||||||||
| 1995 | 47.03 | 52.75 | 49.37 | 53.43 | 58.84 | 66.37 | 73.85 | 76.60 | 72.25 | 65.11 | 57.73 | 47.65 | 60.08 | |||||||||||||
| 1996 | 46.84 | 51.45 | 53.00 | 57.38 | 63.00 | 71.18 | 80.74 | 79.48 | 70.57 | 60.32 | 51.78 | 47.03 | 61.07 | |||||||||||||
| 1997 | 46.06 | 48.91 | 55.61 | 57.47 | 68.37 | 70.12 | 76.87 | 75.27 | 72.62 | 60.66 | 53.15 | 44.73 | 60.82 | |||||||||||||
| 1998 | 46.92 | 44.89 | 50.39 | 51.38 | 53.95 | 64.63 | 77.02 | 78.53 | 70.95 | 59.82 | 49.85 | 42.23 | 57.55 | |||||||||||||
| 1999 | 46.62 | f | 46.56 | c | 48.44 | g | 53.83 | f | 61.71 | e | 69.04 | c | 74.17 | e | 74.23 | g | 74.60 | f | 67.35 | e | 55.50 | g | 47.23 | e | 61.01 | |
| 2000 | 47.48 | d | 49.44 | d | 51.63 | e | 58.70 | g | 62.48 | f | 74.64 | e | 73.78 | h | 76.52 | d | 71.43 | g | 61.00 | h | 47.37 | g | 50.08 | k | 59.94 | |
| 2001 | 44.71 | e | 46.11 | f | 54.91 | d | ----- | z | 71.21 | e | 73.90 | f | 75.74 | f | 77.26 | f | 72.54 | g | 67.23 | e | 53.29 | k | 44.55 | k | 59.52 | |
| 2002 | 43.28 | h | 50.50 | g | 50.44 | 56.52 | g | 61.81 | 72.85 | 78.92 | 75.58 | 74.97 | k | 61.47 | 55.37 | 47.48 | 62.99 | |||||||||
| 2003 | 51.73 | 48.07 | 53.18 | 49.40 | 62.69 | 72.18 | 81.65 | 75.11 | 75.22 | g | 68.47 | 48.60 | 46.74 | 59.80 | ||||||||||||
| 2004 | 44.44 | 45.88 | 58.45 | 58.45 | 63.34 | 70.58 | 77.31 | m | 77.26 | n | 70.12 | i | 60.66 | o | 50.00 | q | 45.53 | k | 56.86 | |||||||
| 2005 | 46.73 | p | 51.39 | f | 52.53 | 54.37 | 61.76 | 66.35 | 82.55 | 80.61 | 68.33 | 61.85 | 55.50 | 48.32 | 63.22 | |||||||||||
| 2006 | 47.53 | 50.48 | 44.35 | 54.32 | 67.35 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.81 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.79 | 45.83 | 48.82 | 53.31 | 60.38 | 67.67 | 74.83 | 73.60 | 68.47 | 59.84 | 49.05 | 43.40 | 56.85 | |||||||||||||
| S.D. | 3.43 | 3.38 | 3.60 | 3.82 | 3.59 | 3.27 | 3.23 | 3.12 | 3.33 | 4.00 | 3.22 | 2.88 | 1.90 | |||||||||||||
| SKEW | 0.31 | 0.17 | 0.51 | -0.26 | 0.62 | -0.07 | 0.25 | -0.06 | -0.15 | 0.55 | 0.47 | -0.20 | 0.64 | |||||||||||||
| MAX | 51.73 | 53.95 | 58.45 | 61.20 | 71.21 | 74.64 | 82.55 | 80.61 | 76.37 | 68.77 | 57.73 | 48.32 | 61.07 | |||||||||||||
| MIN | 36.64 | 38.80 | 43.76 | 42.57 | 52.90 | 60.12 | 68.35 | 66.29 | 61.47 | 53.47 | 43.00 | 37.56 | 53.89 | |||||||||||||
| NO YRS | 52 | 54 | 56 | 51 | 55 | 52 | 47 | 50 | 45 | 51 | 51 | 52 | 38 | |||||||||||||