| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.93 | c | 60.19 | a | 56.83 | b | 50.92 | 47.68 | 55.51 | |||
| 1914 | 45.58 | k | 47.15 | a | 50.55 | 52.52 | 53.79 | 53.62 | 57.95 | 55.63 | 58.03 | 54.05 | 51.48 | 46.90 | 52.88 | |||||||||||
| 1915 | 47.65 | 47.10 | b | 51.11 | ----- | z | 52.07 | c | 53.82 | b | 54.45 | 55.85 | d | 53.90 | 47.66 | c | 43.35 | 42.81 | 49.98 | |||||||
| 1916 | 39.35 | 47.31 | 48.18 | 51.28 | 51.59 | b | 54.58 | 59.06 | 59.27 | 59.30 | 53.00 | 48.52 | 43.32 | a | 51.23 | |||||||||||
| 1917 | 43.37 | 45.50 | 43.48 | 49.23 | 51.48 | 55.55 | 58.37 | a | 56.55 | 58.80 | c | 57.33 | a | 53.47 | 51.52 | 52.05 | ||||||||||
| 1918 | 48.68 | 46.23 | 48.11 | 51.17 | 52.71 | 60.10 | 57.02 | 61.19 | 58.45 | b | ----- | z | 50.73 | 45.00 | i | 53.44 | ||||||||||
| 1919 | 48.26 | 44.91 | 47.31 | 50.88 | 52.81 | 55.80 | 56.61 | 57.77 | 59.12 | 56.63 | 47.86 | a | 46.98 | 52.08 | ||||||||||||
| 1920 | 50.13 | 47.33 | 45.94 | 48.58 | 50.50 | 56.65 | 57.34 | 59.34 | 56.72 | 54.79 | 50.20 | 46.10 | 51.97 | |||||||||||||
| 1921 | 45.40 | 47.11 | 49.65 | 48.90 | 52.17 | a | 56.93 | c | 56.44 | 56.68 | 59.33 | 54.56 | 52.03 | 48.21 | 52.28 | |||||||||||
| 1922 | 43.89 | 44.04 | 46.21 | 47.20 | 52.82 | 56.68 | 57.00 | 58.55 | 60.10 | 55.91 | h | 49.28 | 47.10 | 51.17 | ||||||||||||
| 1923 | 45.97 | 48.25 | 49.79 | 52.72 | 50.77 | 52.28 | 56.39 | 58.50 | 58.43 | 51.98 | 50.35 | 45.03 | 51.71 | |||||||||||||
| 1924 | 44.48 | 46.57 | 45.65 | 53.25 | 53.21 | 55.57 | ----- | z | ----- | z | 56.07 | 54.05 | 46.90 | 39.37 | 49.51 | |||||||||||
| 1925 | 42.90 | 48.25 | 47.66 | 49.62 | 52.56 | 58.18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.86 | |||||||
| 1926 | 47.03 | 51.64 | 53.50 | 54.52 | 54.42 | 54.78 | 60.87 | e | 59.92 | r | 55.60 | 58.40 | 55.23 | 47.93 | a | 53.99 | ||||||||||
| 1927 | 47.95 | 49.25 | 48.55 | 50.12 | 52.08 | 56.72 | 57.90 | 58.00 | 60.53 | 56.61 | 52.00 | 46.79 | 53.04 | |||||||||||||
| 1928 | 49.35 | 50.12 | 52.15 | 51.10 | 54.89 | 57.57 | 58.23 | 57.68 | 58.22 | 54.26 | 51.12 | 48.16 | 53.57 | |||||||||||||
| 1929 | 45.26 | 46.46 | 48.37 | 49.05 | 54.19 | 56.57 | 58.71 | 59.32 | 58.07 | 56.81 | 56.20 | 50.15 | 53.26 | |||||||||||||
| 1930 | 43.56 | 50.80 | 53.29 | 53.03 | 52.65 | 56.95 | 58.85 | 60.95 | 57.77 | 57.37 | 53.47 | 48.58 | 53.94 | |||||||||||||
| 1931 | 50.56 | 50.71 | 50.92 | 54.28 | 57.95 | 58.00 | 61.80 | k | 57.37 | 59.18 | 55.29 | 47.98 | 45.53 | 53.44 | ||||||||||||
| 1932 | 45.13 | 46.47 | 50.06 | 49.43 | 53.98 | 56.09 | g | 58.40 | 67.75 | z | 57.94 | n | 53.96 | q | 54.34 | b | 44.42 | 50.28 | ||||||||
| 1933 | 44.12 | c | 46.10 | g | 47.58 | 51.60 | a | 50.72 | a | 56.00 | 57.77 | 58.76 | 56.98 | 54.97 | 53.35 | 50.03 | 52.90 | |||||||||
| 1934 | 51.92 | 52.34 | 55.10 | 53.58 | 55.68 | 59.23 | 59.53 | 58.92 | 58.90 | 56.08 | f | 53.70 | 50.45 | 55.40 | ||||||||||||
| 1935 | 46.81 | 51.29 | 46.47 | 52.18 | 55.58 | 58.50 | 58.24 | 59.94 | 56.40 | 54.55 | 49.78 | 49.19 | 53.24 | |||||||||||||
| 1936 | 49.26 | 47.98 | 49.11 | 51.15 | 56.21 | 58.80 | 60.04 | h | 59.20 | f | 62.20 | 59.47 | a | 52.59 | c | 47.60 | 53.44 | |||||||||
| 1937 | 40.13 | 43.98 | 49.60 | 48.63 | 55.15 | 59.27 | 61.58 | 60.10 | 60.50 | 58.89 | 53.48 | a | 52.23 | 53.63 | ||||||||||||
| 1938 | 50.44 | 47.86 | 47.81 | 51.85 | 54.15 | 56.85 | 58.16 | 57.90 | 58.18 | 55.87 | 49.77 | 49.10 | 53.16 | |||||||||||||
| 1939 | 47.02 | 44.57 | 47.23 | 51.23 | 55.34 | 56.47 | 58.79 | 58.81 | 60.57 | 57.85 | 52.40 | 50.71 | 53.42 | |||||||||||||
| 1940 | 50.44 | 49.90 | 51.29 | 52.80 | 57.56 | 58.63 | 59.89 | 60.40 | 61.50 | 56.40 | 50.92 | 50.66 | 55.03 | |||||||||||||
| 1941 | 50.34 | 51.68 | 53.89 | 52.72 | 56.65 | 59.10 | 60.76 | 60.11 | 60.98 | 55.53 | 54.27 | 47.58 | 55.30 | |||||||||||||
| 1942 | 48.13 | 46.57 | 47.27 | 50.43 | 52.85 | 57.30 | 60.50 | 60.06 | 58.27 | 55.79 | 50.80 | 48.97 | 53.08 | |||||||||||||
| 1943 | 46.44 | 51.18 | 50.68 | 51.73 | 55.73 | 57.27 | 58.02 | 58.73 | 62.28 | 55.45 | 53.03 | 49.13 | 54.14 | |||||||||||||
| 1944 | 47.29 | 46.36 | 49.76 | 49.05 | ----- | z | 55.55 | 58.16 | 58.23 | 58.05 | 56.90 | 51.08 | 51.26 | 52.88 | ||||||||||||
| 1945 | 49.21 | 48.66 | 46.35 | 50.18 | 52.90 | 58.92 | 59.87 | 57.85 | 60.85 | 55.79 | 50.78 | 49.15 | 53.38 | |||||||||||||
| 1946 | 46.90 | 45.61 | 47.44 | 50.47 | 53.39 | 57.05 | 59.79 | 57.60 | 59.53 | 55.16 | 49.27 | 49.66 | 52.65 | |||||||||||||
| 1947 | 44.79 | 50.96 | 51.40 | 54.02 | 57.39 | 58.00 | 60.05 | 59.68 | 61.55 | 56.66 | 50.25 | 48.24 | 54.42 | |||||||||||||
| 1948 | 49.73 | 44.90 | 46.19 | 47.12 | 51.97 | 58.68 | 59.35 | 59.53 | 58.37 | 55.02 | 49.02 | 42.71 | 51.88 | |||||||||||||
| 1949 | 41.92 | 43.45 | 48.61 | 51.15 | 54.81 | 58.38 | 57.76 | 59.77 | a | 59.36 | a | 54.94 | 55.40 | 45.45 | a | 52.58 | ||||||||||
| 1950 | 40.69 | 47.07 | 47.03 | 50.03 | 53.84 | 56.72 | 60.90 | 59.40 | 58.10 | 56.56 | 54.33 | 52.97 | 53.14 | |||||||||||||
| 1951 | 46.61 | 48.14 | 46.87 | 50.67 | a | 55.61 | 57.20 | 57.94 | 58.23 | a | 57.73 | 56.71 | 52.55 | 47.23 | 52.96 | |||||||||||
| 1952 | 44.21 | 47.07 | 46.34 | 50.60 | 53.96 | g | 57.00 | y | 59.27 | 58.21 | 57.78 | 56.02 | 51.22 | 48.32 | 51.90 | |||||||||||
| 1953 | 50.56 | 48.32 | 47.40 | 49.32 | 52.48 | 56.92 | 58.02 | 59.32 | 61.23 | 56.80 | a | 52.10 | 49.06 | 53.46 | ||||||||||||
| 1954 | 46.42 | 49.91 | 48.82 | 52.18 | 53.89 | 54.77 | 57.29 | 58.58 | 59.48 | 55.29 | 53.57 | 48.31 | 53.21 | |||||||||||||
| 1955 | 45.52 | 45.50 | 47.60 | 46.53 | 53.03 | 56.10 | 57.15 | 55.95 | a | 58.15 | 53.22 | a | 48.97 | 48.53 | 51.35 | |||||||||||
| 1956 | 47.50 | 44.45 | 47.45 | 50.98 | 54.23 | 56.87 | 57.47 | 58.76 | 57.57 | 53.35 | 50.25 | 47.02 | 52.16 | |||||||||||||
| 1957 | 43.74 | 49.09 | 48.97 | 52.12 | 55.05 | 58.68 | 58.98 | 59.05 | 60.52 | 56.92 | 51.70 | 49.52 | 53.69 | |||||||||||||
| 1958 | 50.35 | 52.38 | 48.47 | 52.08 | 56.47 | 61.28 | 58.66 | 59.98 | 64.55 | 56.39 | 51.43 | 52.63 | 55.39 | |||||||||||||
| 1959 | 49.55 | 47.89 | 49.85 | 53.18 | 53.60 | 57.37 | 58.35 | 59.23 | 59.62 | ----- | z | 52.22 | 48.65 | 53.59 | ||||||||||||
| 1960 | 47.31 | 48.59 | 49.40 | 50.57 | 53.02 | 60.38 | 56.85 | 59.44 | 55.57 | 56.19 | 50.80 | 49.79 | 53.16 | |||||||||||||
| 1961 | 50.76 | 49.05 | 49.26 | 51.97 | 52.92 | 57.93 | 58.31 | 57.81 | 60.67 | 54.50 | 49.80 | 47.11 | 53.34 | |||||||||||||
| 1962 | 47.26 | 47.66 | 48.03 | 51.25 | 52.66 | 56.02 | 57.35 | 59.31 | 57.45 | 55.37 | 50.88 | 49.48 | 52.73 | |||||||||||||
| 1963 | 45.47 | 52.93 | 47.66 | 47.88 | 53.23 | 57.50 | 59.42 | 57.13 | 60.33 | 56.73 | 51.97 | 49.66 | 53.33 | |||||||||||||
| 1964 | 46.27 | 49.62 | 46.63 | 49.45 | 50.98 | 55.58 | 57.23 | 59.06 | 58.53 | 55.82 | 49.92 | 47.52 | 52.22 | |||||||||||||
| 1965 | 47.37 | 46.62 | 50.53 | 51.68 | 52.74 | 55.47 | 56.71 | 61.19 | 56.98 | 57.06 | 53.60 | 46.87 | 53.07 | |||||||||||||
| 1966 | 47.32 | 46.43 | 47.61 | 54.00 | 54.84 | 57.90 | 57.97 | 58.65 | 62.27 | 56.16 | 51.68 | 49.18 | 53.67 | |||||||||||||
| 1967 | 47.11 | 49.12 | 46.98 | 47.27 | 54.06 | 57.08 | 58.95 | 58.35 | 61.73 | 57.77 | 55.05 | 47.16 | 53.39 | |||||||||||||
| 1968 | 46.77 | 52.00 | 50.79 | 50.55 | 53.61 | 57.53 | 57.53 | 60.19 | 59.52 | 53.95 | 50.98 | 45.60 | 53.25 | |||||||||||||
| 1969 | 43.56 | 45.07 | 50.16 | 49.28 | 55.90 | 58.50 | 59.02 | 58.68 | 58.78 | 55.90 | 53.08 | 49.95 | 53.16 | |||||||||||||
| 1970 | 49.77 | 51.91 | 51.69 | 48.27 | 55.34 | 56.57 | 57.97 | 57.98 | 60.92 | 55.10 | 53.00 | 46.79 | 53.78 | |||||||||||||
| 1971 | 46.18 | 46.50 | 46.97 | 48.40 | 53.35 | 54.97 | 57.31 | 60.87 | 60.12 | d | 52.87 | a | 49.70 | 43.92 | a | 51.76 | ||||||||||
| 1972 | 44.53 | 47.86 | 50.23 | 49.83 | 53.82 | 58.10 | i | 59.97 | 60.81 | 57.59 | b | 57.21 | 51.80 | e | 44.02 | 52.52 | ||||||||||
| 1973 | 46.16 | 51.20 | 47.47 | 52.70 | 53.55 | a | 57.58 | 58.44 | 56.80 | a | 60.15 | 54.55 | a | 49.23 | b | 49.73 | 53.13 | |||||||||
| 1974 | 46.13 | 46.73 | 49.39 | 50.80 | 53.24 | 57.35 | 59.34 | 59.57 | b | 57.41 | b | 57.47 | 51.18 | 48.40 | 53.08 | |||||||||||
| 1975 | 46.59 | b | 47.43 | 48.39 | 47.93 | 55.53 | 58.27 | 60.00 | 58.10 | 57.67 | 54.47 | 49.55 | 46.23 | 52.51 | ||||||||||||
| 1976 | 47.76 | 46.16 | 46.32 | 48.50 | 53.60 | 56.90 | 59.29 | 59.94 | 58.70 | 56.31 | 54.26 | a | 48.42 | a | 53.01 | |||||||||||
| 1977 | 48.81 | 51.46 | 46.81 | 50.62 | a | 52.47 | 57.92 | 58.71 | c | 59.21 | 57.80 | 53.89 | 49.20 | 48.65 | 52.96 | |||||||||||
| 1978 | 50.20 | f | 48.59 | 52.71 | 52.23 | o | 56.23 | 57.33 | 59.56 | 59.44 | 59.56 | e | 58.79 | 49.18 | 44.90 | 54.63 | ||||||||||
| 1979 | 46.50 | 46.89 | 51.23 | 51.72 | 57.50 | 57.82 | 60.76 | 61.47 | 63.93 | a | 58.11 | 51.98 | 50.45 | 54.86 | ||||||||||||
| 1980 | 47.66 | 52.40 | 49.35 | 52.68 | 54.08 | 57.57 | 61.26 | 59.15 | a | 60.93 | 56.95 | 52.78 | 51.18 | 54.67 | ||||||||||||
| 1981 | 52.74 | 51.44 | b | 51.23 | 52.30 | 55.45 | 59.98 | 59.37 | 60.50 | 59.42 | 54.66 | 53.23 | 50.37 | 55.06 | ||||||||||||
| 1982 | 45.39 | 48.32 | 48.19 | 51.00 | 56.56 | 57.88 | 59.48 | 60.11 | 61.52 | 57.79 | 51.48 | 49.34 | 53.92 | |||||||||||||
| 1983 | 50.48 | 51.12 | 51.82 | 51.75 | 56.18 | 59.65 | 61.50 | 61.74 | 62.81 | c | 57.94 | 51.92 | 48.66 | 55.46 | ||||||||||||
| 1984 | 50.70 | a | 49.47 | 52.37 | 50.78 | 55.40 | 57.98 | 62.34 | 61.94 | 61.45 | 54.77 | 50.92 | 46.68 | 54.57 | ||||||||||||
| 1985 | 50.40 | 50.14 | 47.50 | a | 53.05 | 54.89 | 60.92 | 62.42 | a | 62.29 | 60.42 | 57.56 | 46.07 | 49.34 | 54.58 | |||||||||||
| 1986 | 51.26 | 51.93 | 54.10 | 52.47 | 54.39 | 60.22 | 61.47 | 60.29 | 60.03 | 57.94 | 54.75 | 49.68 | 55.71 | |||||||||||||
| 1987 | 49.55 | 52.20 | 51.79 | 54.75 | 59.24 | 60.42 | 60.60 | 62.92 | 60.30 | 58.47 | 53.94 | e | 47.98 | 56.01 | ||||||||||||
| 1988 | 48.06 | 50.62 | 51.00 | 52.98 | 54.77 | 60.20 | 61.19 | ----- | z | ----- | z | ----- | z | 51.97 | 49.16 | 53.33 | ||||||||||
| 1989 | 47.92 | l | 44.12 | 48.13 | 55.33 | 56.15 | 58.95 | 58.81 | 59.42 | 57.63 | 53.95 | 54.22 | g | ----- | z | 54.72 | ||||||||||
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | 55.06 | 57.22 | 60.06 | 60.29 | 61.45 | 56.76 | 50.28 | 43.03 | 55.52 | |||||||||
| 1991 | 46.82 | 51.46 | 47.02 | 50.07 | 52.53 | 55.73 | 59.52 | 58.74 | 58.47 | a | 55.63 | 50.98 | 48.29 | 52.94 | ||||||||||||
| 1992 | 49.02 | 52.86 | 54.32 | 55.50 | 57.27 | 58.83 | 60.85 | 58.90 | 59.35 | 59.03 | 51.83 | 47.40 | 55.43 | |||||||||||||
| 1993 | 46.42 | 49.16 | 52.58 | 52.23 | 56.29 | 59.98 | 61.21 | 61.71 | 57.25 | 57.71 | 50.60 | 48.39 | 54.46 | |||||||||||||
| 1994 | 50.73 | 47.70 | 51.84 | 52.68 | 55.31 | 57.18 | 58.76 | 60.16 | 59.60 | 55.11 | 46.55 | 46.85 | 53.54 | |||||||||||||
| 1995 | 51.63 | 51.32 | 50.68 | 50.97 | 54.71 | 57.78 | 62.68 | 59.97 | 59.80 | 57.97 | 53.77 | 52.31 | 55.30 | |||||||||||||
| 1996 | 49.06 | 51.31 | 51.90 | 52.93 | 54.32 | 57.18 | 58.47 | 59.05 | 58.05 | 55.27 | 51.55 | 50.84 | 54.16 | |||||||||||||
| 1997 | 48.74 | 49.54 | 50.26 | 51.77 | 57.63 | 58.98 | 61.31 | 61.27 | 63.08 | 56.32 | 54.07 | 50.24 | 55.27 | |||||||||||||
| 1998 | 51.27 | 49.57 | 51.18 | 50.93 | 54.42 | 59.03 | 59.76 | 60.03 | 58.82 | 56.61 | 51.23 | 45.95 | 54.07 | |||||||||||||
| 1999 | 48.39 | 46.71 | 46.76 | 51.27 | 52.94 | 55.39 | b | 57.21 | b | 59.81 | 58.30 | 54.08 | ----- | z | 48.55 | 52.67 | ||||||||||
| 2000 | 48.71 | 50.50 | 48.95 | 51.92 | 55.21 | 57.72 | 58.39 | 57.94 | 60.20 | 54.44 | 49.17 | 49.73 | 53.57 | |||||||||||||
| 2001 | 48.61 | 48.27 | 49.71 | 48.02 | 55.92 | 55.85 | 59.29 | 60.11 | 58.30 | 57.60 | 52.90 | 49.35 | 53.66 | |||||||||||||
| 2002 | 47.53 | 51.75 | 48.68 | 51.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.96 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 47.34 | 48.58 | 49.23 | 51.10 | 54.28 | 57.45 | 58.96 | 59.25 | 59.30 | 55.91 | 51.40 | 48.12 | 53.51 | |||||||||||||
| S.D. | 2.73 | 2.47 | 2.31 | 1.94 | 1.81 | 1.70 | 1.57 | 1.48 | 1.90 | 1.83 | 2.23 | 2.42 | 1.11 | |||||||||||||
| SKEW | -0.55 | -0.07 | 0.36 | -0.14 | 0.21 | -0.20 | 0.19 | -0.07 | 0.19 | -1.08 | -0.58 | -0.80 | 0.26 | |||||||||||||
| MAX | 52.74 | 52.93 | 55.10 | 55.50 | 59.24 | 61.28 | 62.68 | 62.92 | 64.55 | 59.47 | 56.20 | 52.97 | 56.01 | |||||||||||||
| MIN | 39.35 | 43.45 | 43.48 | 46.53 | 50.50 | 52.28 | 54.45 | 55.63 | 53.90 | 47.66 | 43.35 | 39.37 | 51.23 | |||||||||||||
| NO YRS | 85 | 87 | 88 | 86 | 86 | 85 | 84 | 83 | 86 | 82 | 86 | 86 | 67 | |||||||||||||