| 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 | 52.30 | a | 49.93 | a | 46.27 | a | 44.93 | 41.16 | 46.92 | |||
| 1914 | 39.23 | 36.79 | 40.84 | 41.93 | 44.06 | 45.20 | 47.32 | 47.29 | 47.23 | 45.19 | 42.13 | 38.42 | 42.97 | |||||||||||||
| 1915 | 39.97 | 40.54 | b | 42.26 | 42.60 | 44.61 | c | 44.31 | a | 46.48 | 48.54 | c | 44.47 | 38.10 | a | 36.93 | 36.74 | 42.13 | ||||||||
| 1916 | 35.68 | 41.17 | 40.03 | 42.20 | 42.39 | 44.47 | 48.94 | 50.23 | 50.90 | 42.97 | 40.43 | 36.77 | 43.01 | |||||||||||||
| 1917 | 34.74 | 37.54 | 36.48 | 42.07 | 43.19 | 45.63 | 48.37 | a | 48.48 | 49.21 | b | 46.10 | a | 46.00 | 45.97 | 43.65 | ||||||||||
| 1918 | 42.61 | 39.39 | 40.32 | 41.90 | 42.23 | 48.67 | 49.35 | 52.26 | 54.33 | ----- | z | 44.50 | 38.65 | 44.93 | ||||||||||||
| 1919 | 41.35 | 39.29 | 40.26 | 43.07 | 44.10 | 45.57 | 47.97 | 49.74 | 50.17 | 44.87 | 40.67 | 40.23 | 43.94 | |||||||||||||
| 1920 | 42.00 | 38.31 | 38.94 | 40.43 | 41.03 | 47.67 | 50.55 | 50.23 | 50.57 | 47.19 | 42.33 | 40.03 | 44.11 | |||||||||||||
| 1921 | 39.39 | 41.07 | 43.68 | 41.63 | 44.90 | a | 50.31 | a | 47.81 | 50.06 | 48.83 | 48.26 | 45.27 | 40.97 | 45.18 | |||||||||||
| 1922 | 36.19 | 37.04 | 39.45 | 37.90 | 44.23 | 49.00 | 49.61 | 51.19 | 50.63 | 48.81 | 41.17 | 41.48 | 43.89 | |||||||||||||
| 1923 | 40.94 | 39.46 | 40.68 | 44.03 | 45.42 | 48.63 | 52.48 | 52.61 | 51.07 | 45.77 | 45.03 | 37.35 | 45.29 | |||||||||||||
| 1924 | 38.00 | 41.10 | 39.06 | 43.87 | 46.23 | 47.80 | ----- | z | ----- | z | 49.00 | 50.58 | 41.30 | 32.13 | 42.91 | |||||||||||
| 1925 | 37.45 | 43.11 | 40.84 | 43.97 | 46.48 | 50.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.66 | |||||||
| 1926 | 41.55 | 45.11 | 44.84 | 48.37 | 45.97 | 43.47 | 51.54 | e | 46.46 | r | 41.27 | 48.97 | 49.33 | 40.90 | 45.57 | |||||||||||
| 1927 | 42.45 | 41.96 | 40.58 | 42.23 | 43.90 | 48.73 | 49.19 | 50.55 | 50.97 | 46.68 | 46.20 | 38.32 | 45.15 | |||||||||||||
| 1928 | 42.65 | 41.52 | 45.58 | 43.37 | 46.39 | 48.63 | 50.45 | 49.84 | 49.60 | 46.45 | 44.73 | 40.61 | 45.82 | |||||||||||||
| 1929 | 37.61 | 35.96 | 41.23 | 42.47 | 44.71 | 49.27 | 49.42 | 50.84 | 47.07 | 47.19 | 44.57 | 43.97 | 44.52 | |||||||||||||
| 1930 | 36.84 | 43.54 | 42.84 | 45.93 | 43.71 | 47.43 | 48.87 | 53.03 | 50.80 | 47.71 | 44.03 | 40.16 | 45.41 | |||||||||||||
| 1931 | 42.68 | 42.07 | 43.23 | 44.40 | 47.52 | 49.20 | 51.62 | g | 48.06 | 48.63 | 47.39 | 39.37 | 39.10 | 44.69 | ||||||||||||
| 1932 | 37.81 | 37.97 | 42.45 | 42.03 | 45.68 | 47.08 | d | 49.00 | 52.14 | x | 47.91 | g | 46.94 | o | 47.21 | a | 37.68 | 42.99 | ||||||||
| 1933 | 37.00 | c | 37.90 | g | 41.26 | 41.38 | a | 43.83 | a | 47.27 | 47.55 | 49.35 | 48.50 | 46.48 | 43.70 | 44.23 | 44.60 | |||||||||
| 1934 | 44.68 | 44.21 | 46.74 | 45.57 | 45.00 | 47.80 | 50.35 | 50.81 | 47.77 | 48.77 | e | 47.73 | 42.68 | 46.84 | ||||||||||||
| 1935 | 39.52 | 42.71 | 37.10 | 43.23 | 44.19 | 48.00 | 48.68 | 49.45 | 50.17 | 46.13 | 40.93 | 41.61 | 44.31 | |||||||||||||
| 1936 | 42.74 | 40.69 | 39.94 | 43.97 | 48.32 | 51.57 | 51.57 | h | 50.28 | f | 49.17 | 47.80 | a | 42.48 | c | 40.84 | 44.75 | |||||||||
| 1937 | 33.45 | 37.82 | 42.55 | 41.67 | 47.00 | 52.13 | 52.16 | 51.10 | 52.70 | 52.16 | 48.52 | a | 46.16 | 46.45 | ||||||||||||
| 1938 | 43.39 | 41.29 | 40.81 | 44.63 | 45.45 | 47.87 | 49.97 | 47.45 | 50.37 | 48.16 | 41.23 | 42.19 | 45.23 | |||||||||||||
| 1939 | 40.00 | 36.46 | 39.32 | 42.77 | 46.77 | 47.30 | 51.65 | 52.13 | 51.60 | 49.35 | 44.47 | 45.03 | 45.57 | |||||||||||||
| 1940 | 43.74 | 44.41 | 44.42 | 44.97 | 48.71 | 49.27 | 52.19 | 51.77 | 54.60 | 49.84 | 44.10 | 43.35 | 47.61 | |||||||||||||
| 1941 | 44.13 | 44.68 | 45.87 | 45.67 | 49.23 | 51.27 | 53.06 | 53.81 | 52.27 | 48.35 | 47.60 | 42.03 | 48.16 | |||||||||||||
| 1942 | 40.71 | 38.32 | 38.45 | 42.63 | 45.48 | 47.97 | 53.06 | 51.68 | 49.20 | 46.84 | 44.00 | 43.61 | 45.16 | |||||||||||||
| 1943 | 37.71 | 42.46 | 43.06 | 44.50 | 45.32 | 48.47 | 50.00 | 51.35 | 52.70 | 48.00 | 45.23 | 40.71 | 45.79 | |||||||||||||
| 1944 | 39.65 | 37.79 | 38.94 | 42.13 | ----- | z | 47.83 | 49.90 | 49.00 | 49.43 | 49.48 | 44.23 | 44.42 | 44.80 | ||||||||||||
| 1945 | 42.65 | 41.96 | 40.13 | 41.90 | 47.90 | 48.13 | 49.39 | 51.29 | 50.97 | 48.42 | 45.33 | 43.77 | 45.99 | |||||||||||||
| 1946 | 39.90 | 39.50 | 41.00 | 43.67 | 46.65 | 50.20 | 51.74 | 51.48 | 50.80 | 46.94 | 42.53 | 44.06 | 45.71 | |||||||||||||
| 1947 | 37.87 | 44.64 | 45.00 | 46.33 | 48.06 | 50.27 | 53.77 | 53.42 | 52.43 | 51.42 | 42.70 | 41.97 | 47.32 | |||||||||||||
| 1948 | 41.32 | 37.62 | 39.16 | 41.37 | 46.16 | 51.17 | 50.87 | 51.90 | 49.90 | 47.29 | 41.80 | 36.32 | 44.57 | |||||||||||||
| 1949 | 32.90 | 38.50 | 42.19 | 44.07 | 48.55 | 48.87 | 49.03 | 51.87 | 50.97 | a | 45.45 | 48.10 | 38.39 | 44.91 | ||||||||||||
| 1950 | 35.35 | 40.96 | 40.71 | 41.50 | 43.26 | 49.70 | 50.61 | 52.26 | 50.10 | 50.61 | 47.60 | 48.42 | 45.92 | |||||||||||||
| 1951 | 40.74 | 41.82 | 38.10 | 43.57 | 46.81 | 47.73 | 51.19 | 49.60 | a | 50.47 | 48.65 | 46.20 | 40.65 | 45.46 | ||||||||||||
| 1952 | 39.10 | 40.55 | 38.87 | 43.00 | 45.96 | e | 50.40 | y | 51.26 | 50.71 | 49.43 | 48.39 | 40.97 | 41.74 | 44.54 | |||||||||||
| 1953 | 45.71 | 39.39 | 38.94 | 41.60 | 45.10 | 48.10 | 49.48 | 52.19 | 53.60 | 48.43 | a | 47.13 | 42.00 | 45.97 | ||||||||||||
| 1954 | 40.68 | 42.07 | 41.35 | 43.90 | 45.77 | 48.37 | 50.58 | 51.55 | 51.70 | 47.19 | 47.37 | 41.55 | 46.01 | |||||||||||||
| 1955 | 38.39 | 37.68 | 39.61 | 39.30 | 43.81 | 48.37 | 50.32 | 48.77 | 49.03 | 47.20 | a | 43.23 | 43.52 | 44.10 | ||||||||||||
| 1956 | 41.97 | 37.07 | 40.48 | 43.37 | 47.52 | 48.57 | 51.10 | 51.45 | 49.00 | 45.68 | 41.70 | 40.13 | 44.84 | |||||||||||||
| 1957 | 36.71 | 43.18 | 43.71 | 43.47 | 47.74 | 49.07 | 51.06 | 52.39 | 53.37 | 49.00 | 43.70 | 43.35 | 46.40 | |||||||||||||
| 1958 | 44.26 | 47.50 | 40.68 | 43.50 | 49.13 | 53.33 | 53.19 | 52.48 | 52.93 | 47.94 | 45.90 | 46.42 | 48.11 | |||||||||||||
| 1959 | 43.26 | 39.75 | 41.68 | 44.53 | 44.84 | 49.33 | 50.48 | 49.65 | 51.23 | ----- | z | 43.93 | 40.77 | 45.41 | ||||||||||||
| 1960 | 41.48 | 40.69 | 43.90 | 43.20 | 46.03 | 49.87 | 49.97 | 50.48 | 48.30 | 48.58 | 43.80 | 42.42 | 45.73 | |||||||||||||
| 1961 | 43.58 | 42.89 | 42.97 | 43.17 | 46.48 | 50.57 | 50.81 | 51.45 | 49.60 | 46.06 | 43.27 | 41.03 | 45.99 | |||||||||||||
| 1962 | 38.26 | 41.00 | 41.42 | 43.17 | 43.55 | 45.77 | 48.19 | 51.71 | 50.93 | 46.77 | 43.43 | 41.90 | 44.68 | |||||||||||||
| 1963 | 35.26 | 46.36 | 39.35 | 39.83 | 45.29 | 47.27 | 48.81 | 47.81 | 52.30 | 49.10 | 45.57 | 42.39 | 44.94 | |||||||||||||
| 1964 | 39.87 | 39.24 | 38.35 | 39.87 | 42.58 | 47.23 | 49.13 | 49.29 | 47.20 | 47.61 | 43.13 | 42.42 | 43.83 | |||||||||||||
| 1965 | 41.48 | 38.57 | 40.97 | 44.20 | 42.45 | 46.43 | 48.52 | 52.71 | 47.57 | 48.39 | 47.53 | 39.39 | 44.85 | |||||||||||||
| 1966 | 41.19 | 39.39 | 41.68 | 44.37 | 44.81 | 47.90 | 49.29 | 49.23 | 52.40 | 47.90 | 45.63 | 42.58 | 45.53 | |||||||||||||
| 1967 | 41.06 | 40.50 | 39.58 | 39.37 | 45.45 | 48.97 | 50.81 | 50.42 | 52.07 | 49.32 | 47.20 | 39.16 | 45.33 | |||||||||||||
| 1968 | 39.32 | 46.72 | 42.87 | 40.23 | 45.19 | 48.27 | 49.68 | 52.61 | 49.70 | 45.39 | 44.47 | 39.52 | 45.33 | |||||||||||||
| 1969 | 37.87 | 38.79 | 40.55 | 41.17 | 47.90 | 51.43 | 49.55 | 48.32 | 49.30 | 46.32 | 43.43 | 42.87 | 44.79 | |||||||||||||
| 1970 | 44.13 | 42.96 | 42.10 | 38.07 | 45.42 | 49.07 | 50.03 | 50.42 | 49.33 | 46.16 | 46.73 | 40.77 | 45.43 | |||||||||||||
| 1971 | 38.97 | 39.25 | 40.29 | 40.63 | 44.74 | 47.67 | 50.10 | 54.39 | 51.19 | d | 44.57 | a | 42.50 | 37.53 | a | 44.32 | ||||||||||
| 1972 | 38.48 | 42.17 | 43.71 | 41.50 | 46.06 | 48.95 | i | 51.97 | 52.06 | 49.11 | b | 47.39 | 45.16 | e | 37.87 | 45.04 | ||||||||||
| 1973 | 40.03 | 44.07 | 39.71 | 42.47 | 45.93 | a | 48.83 | 49.06 | 49.87 | a | 51.63 | 46.73 | a | 44.50 | b | 44.74 | 45.63 | |||||||||
| 1974 | 39.19 | 40.25 | 43.48 | 43.10 | 44.23 | 49.37 | 51.77 | 52.28 | b | 49.93 | b | 46.48 | 44.23 | 42.65 | 45.58 | |||||||||||
| 1975 | 39.76 | b | 40.68 | 41.10 | 39.43 | 45.84 | 48.60 | 52.10 | 50.35 | 50.33 | 47.61 | 42.03 | 38.84 | 44.72 | ||||||||||||
| 1976 | 40.87 | 39.03 | 38.35 | 40.67 | 44.94 | 47.57 | 52.19 | 53.42 | 51.37 | 47.94 | 47.17 | a | 39.00 | a | 45.21 | |||||||||||
| 1977 | 40.52 | 44.39 | 38.48 | 42.41 | a | 44.52 | 49.53 | 49.21 | c | 52.94 | 51.00 | 46.32 | 41.67 | 41.55 | 45.21 | |||||||||||
| 1978 | 42.94 | 41.25 | 43.94 | 42.80 | o | 46.90 | 51.13 | 51.94 | 52.61 | 52.35 | d | 50.29 | 41.47 | 36.94 | 46.52 | |||||||||||
| 1979 | 38.90 | 41.54 | 44.19 | 44.23 | 48.61 | 48.87 | 53.35 | 53.77 | 55.67 | 51.58 | 44.77 | 43.94 | 47.45 | |||||||||||||
| 1980 | 40.19 | 45.66 | 40.94 | 44.87 | 46.03 | 50.30 | 53.26 | 50.80 | a | 52.17 | 48.90 | 45.53 | 44.32 | 46.91 | ||||||||||||
| 1981 | 45.52 | 43.22 | a | 43.13 | 43.97 | 47.68 | 51.00 | 50.29 | 53.87 | 51.43 | 47.77 | 47.23 | 45.06 | 47.51 | ||||||||||||
| 1982 | 38.13 | 40.64 | 40.23 | 42.13 | 46.13 | 50.77 | 52.32 | 53.68 | 51.90 | 50.35 | 44.03 | 42.81 | 46.09 | |||||||||||||
| 1983 | 44.39 | 45.96 | 45.71 | 42.67 | 47.84 | 50.73 | 54.03 | 55.23 | 53.90 | 50.58 | 45.80 | 43.48 | 48.36 | |||||||||||||
| 1984 | 43.00 | 42.34 | 44.97 | 42.13 | 46.74 | 49.27 | 52.68 | 53.87 | 51.37 | 47.42 | 44.53 | 38.97 | 46.44 | |||||||||||||
| 1985 | 41.26 | 41.18 | 40.19 | 45.27 | 46.94 | 50.70 | 53.53 | a | 53.23 | 51.47 | 48.32 | 38.77 | 41.06 | 45.99 | ||||||||||||
| 1986 | 45.55 | 45.82 | 46.42 | 43.67 | 46.23 | 51.90 | 52.29 | 53.45 | 51.83 | 50.00 | 47.47 | 42.84 | 48.12 | |||||||||||||
| 1987 | 42.32 | 44.21 | 43.39 | 45.03 | 50.87 | 51.73 | 52.81 | 53.58 | 53.93 | 50.45 | 47.76 | e | 42.39 | 48.21 | ||||||||||||
| 1988 | 42.16 | 42.21 | 41.48 | 45.43 | 47.10 | 53.13 | 52.42 | ----- | z | ----- | z | ----- | z | 46.80 | 42.13 | 45.87 | ||||||||||
| 1989 | 44.21 | l | 36.93 | 41.61 | 47.37 | 47.55 | 51.03 | 51.32 | 51.84 | 48.93 | 45.97 | 45.61 | g | ----- | z | 46.95 | ||||||||||
| 1990 | ----- | z | ----- | z | ----- | z | ----- | z | 46.45 | 49.20 | 53.03 | 52.97 | 53.93 | 47.58 | 42.43 | 35.23 | 47.60 | |||||||||
| 1991 | 38.87 | 44.46 | 38.81 | 42.73 | 44.58 | 46.90 | 50.48 | 53.71 | 50.20 | 46.68 | 44.23 | 40.26 | 45.16 | |||||||||||||
| 1992 | 41.81 | 45.79 | 46.71 | 48.07 | 48.23 | 51.03 | 53.71 | 52.45 | 49.57 | 50.29 | 45.10 | 41.03 | 47.82 | |||||||||||||
| 1993 | 39.94 | 41.36 | 46.77 | 45.93 | 49.71 | 50.77 | 50.03 | 53.32 | 49.53 | 49.58 | 41.20 | 40.90 | 46.59 | |||||||||||||
| 1994 | 43.45 | 41.14 | 43.45 | 44.80 | 48.26 | 49.00 | 50.29 | 50.61 | 51.70 | 45.90 | 39.53 | 41.06 | 45.77 | |||||||||||||
| 1995 | 47.16 | 44.61 | 43.61 | 42.80 | 46.90 | 49.57 | 55.32 | 49.65 | 52.80 | 47.90 | 48.23 | 46.68 | 47.94 | |||||||||||||
| 1996 | 42.87 | 44.76 | 42.65 | 45.73 | 45.16 | 47.37 | 50.90 | 50.74 | 49.03 | 47.45 | 45.30 | 45.52 | 46.46 | |||||||||||||
| 1997 | 42.16 | 40.96 | 42.19 | 44.37 | 49.61 | 49.90 | 52.10 | 54.19 | 54.63 | 48.13 | 47.83 | 42.26 | 47.36 | |||||||||||||
| 1998 | 46.77 | 43.96 | 43.84 | 42.77 | 47.26 | 51.10 | 53.39 | 53.03 | 51.07 | 47.84 | 45.87 | 39.77 | 47.22 | |||||||||||||
| 1999 | 41.71 | 41.25 | 39.81 | 42.20 | 44.61 | 46.93 | b | 50.14 | b | 53.65 | 49.60 | 45.84 | ----- | z | 40.84 | 45.14 | ||||||||||
| 2000 | 42.65 | 44.59 | 39.81 | 44.77 | 47.39 | 49.47 | 52.00 | 50.35 | 51.60 | 46.13 | 41.73 | 41.52 | 46.00 | |||||||||||||
| 2001 | 40.48 | 40.86 | 41.55 | 40.37 | 45.06 | 46.13 | 50.42 | 52.48 | 49.53 | 48.13 | 46.57 | 43.35 | 45.41 | |||||||||||||
| 2002 | 40.55 | 44.32 | 40.03 | 42.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.83 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.58 | 41.40 | 41.57 | 43.02 | 45.94 | 48.85 | 50.75 | 51.41 | 50.59 | 47.67 | 44.33 | 41.37 | 45.68 | |||||||||||||
| S.D. | 2.89 | 2.71 | 2.33 | 2.01 | 1.88 | 1.92 | 1.77 | 1.79 | 2.18 | 2.01 | 2.52 | 2.75 | 1.34 | |||||||||||||
| SKEW | -0.24 | 0.08 | 0.37 | 0.00 | 0.02 | -0.24 | 0.10 | -0.29 | -0.81 | -1.09 | -0.36 | -0.33 | 0.01 | |||||||||||||
| MAX | 47.16 | 47.50 | 46.77 | 48.37 | 50.87 | 53.33 | 55.32 | 55.23 | 55.67 | 52.16 | 49.33 | 48.42 | 48.36 | |||||||||||||
| MIN | 32.90 | 35.96 | 36.48 | 37.90 | 41.03 | 43.47 | 46.48 | 47.29 | 41.27 | 38.10 | 36.93 | 32.13 | 42.13 | |||||||||||||
| NO YRS | 87 | 87 | 88 | 87 | 87 | 86 | 84 | 83 | 86 | 84 | 86 | 87 | 71 | |||||||||||||