| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 65.48 | 65.12 | a | 61.10 | 53.56 | 43.75 | 38.42 | a | 54.57 | |||||
| 1949 | 30.15 | 39.34 | 47.18 | 53.43 | 60.11 | 62.42 | 65.52 | 66.42 | 63.12 | 48.16 | 49.23 | 41.69 | 52.23 | |||||||||||||
| 1950 | 29.66 | 41.62 | 45.82 | a | 50.72 | 55.77 | 62.83 | 67.25 | c | 69.22 | a | 61.83 | 52.69 | 47.20 | 47.24 | 52.66 | ||||||||||
| 1951 | 39.90 | 43.27 | 42.50 | 54.80 | 57.66 | 64.85 | 68.58 | a | 66.42 | a | 64.26 | a | 54.50 | 46.55 | 38.77 | 53.51 | ||||||||||
| 1952 | 37.76 | 42.05 | 45.16 | 53.98 | 58.40 | 61.10 | 69.60 | a | 68.26 | 65.28 | 59.16 | 41.26 | a | 42.05 | 53.67 | |||||||||||
| 1953 | 48.02 | 44.59 | 46.39 | 51.10 | 56.00 | 59.15 | 67.21 | 67.84 | 63.67 | 55.35 | 49.07 | 43.73 | a | 54.34 | ||||||||||||
| 1954 | 39.97 | 44.30 | 44.35 | 51.07 | 58.60 | 59.30 | 64.45 | 64.37 | 61.33 | a | 53.98 | 50.90 | 42.27 | 52.91 | ||||||||||||
| 1955 | 40.63 | 41.48 | b | 42.32 | 47.20 | 54.45 | 62.18 | 64.11 | 66.02 | 62.02 | 54.48 | a | 42.62 | 41.21 | 51.56 | |||||||||||
| 1956 | 41.39 | 36.91 | 45.03 | 54.30 | 60.92 | 60.18 | 69.53 | 66.33 | a | 62.45 | 51.90 | 44.30 | 40.81 | 52.84 | ||||||||||||
| 1957 | 32.26 | 43.16 | 47.42 | 53.70 | 59.82 | 63.09 | a | 66.23 | a | 65.02 | 67.22 | 53.84 | 44.52 | 44.52 | b | 53.40 | ||||||||||
| 1958 | 44.32 | 50.00 | 46.27 | 52.17 | 63.24 | 67.03 | 72.66 | 71.97 | 63.98 | a | 57.03 | 47.22 | 46.08 | 56.83 | ||||||||||||
| 1959 | 43.08 | 43.71 | 47.26 | 53.07 | 56.58 | 63.38 | 69.45 | 66.63 | 60.50 | 55.85 | a | 46.13 | 41.56 | 53.93 | ||||||||||||
| 1960 | 37.31 | 43.60 | 46.71 | 52.40 | 55.21 | 64.30 | 69.82 | 65.66 | 63.00 | 55.61 | 46.75 | 40.97 | 53.45 | |||||||||||||
| 1961 | 45.21 | 47.41 | 48.10 | 51.07 | 57.08 | 67.27 | 70.19 | 71.31 | 60.38 | 53.71 | 43.85 | 41.37 | 54.75 | |||||||||||||
| 1962 | 39.21 | 43.05 | 45.94 | 53.63 | 53.69 | 62.67 | 66.82 | 66.90 | 64.43 | 54.29 | 48.07 | 43.56 | 53.52 | |||||||||||||
| 1963 | 35.69 | 48.96 | 46.68 | 49.75 | 58.56 | 61.32 | 64.10 | 67.45 | 66.47 | 55.29 | 47.75 | 41.19 | 53.60 | |||||||||||||
| 1964 | 43.05 | 42.91 | 45.77 | 49.85 | 55.32 | 60.83 | 67.18 | 65.52 | 61.27 | 56.48 | 43.43 | 39.13 | 52.56 | |||||||||||||
| 1965 | 41.74 | 44.55 | 50.55 | 52.98 | 54.77 | 61.65 | 69.37 | 68.13 | 61.17 | 56.34 | 49.18 | 38.97 | 54.12 | |||||||||||||
| 1966 | 40.77 | 42.98 | 46.71 | 53.00 | 58.35 | 63.08 | 66.55 | 67.85 | 65.05 | 54.29 | 48.43 | 45.60 | 54.39 | |||||||||||||
| 1967 | 44.92 | 44.86 | 45.21 | 47.95 | 58.53 | 67.18 | 70.06 | 73.98 | 68.00 | a | 54.95 | a | 48.37 | 42.13 | 55.51 | |||||||||||
| 1968 | 41.05 | 50.97 | 50.18 | 50.45 | 58.00 | 63.60 | 69.02 | a | 66.65 | 63.52 | 53.21 | 47.57 | 38.16 | 54.36 | ||||||||||||
| 1969 | 33.62 | a | 42.27 | 48.82 | 51.53 | 61.47 | 67.23 | 67.72 | a | 66.47 | 63.65 | 53.29 | 46.60 | a | 43.31 | 53.83 | ||||||||||
| 1970 | 41.89 | 47.80 | 48.18 | 48.53 | 58.24 | 66.93 | 69.23 | a | 68.81 | 60.77 | 53.69 | 47.24 | a | 40.76 | 54.34 | |||||||||||
| 1971 | 40.77 | 43.02 | 44.40 | 50.65 | 58.61 | 59.73 | 69.34 | 71.29 | 60.67 | 51.84 | 45.57 | 39.82 | 52.98 | |||||||||||||
| 1972 | 39.08 | 43.91 | 49.44 | 48.00 | 60.55 | 63.52 | 70.89 | 71.18 | 60.95 | 53.60 | 48.47 | 37.24 | 53.90 | |||||||||||||
| 1973 | 39.34 | 46.21 | 47.18 | 52.27 | 60.27 | 63.27 | 69.32 | 65.16 | 64.03 | 53.27 | a | 43.88 | 44.31 | 54.04 | ||||||||||||
| 1974 | 38.08 | 42.55 | 47.55 | 51.47 | 55.32 | 65.05 | a | 67.27 | 68.95 | 68.45 | a | 55.66 | 47.47 | 43.47 | 54.27 | |||||||||||
| 1975 | 42.16 | 41.66 | 44.63 | 47.65 | 57.71 | 62.41 | a | 68.89 | 64.65 | 66.92 | 53.48 | 45.35 | 43.92 | 53.29 | ||||||||||||
| 1976 | 43.05 | 42.07 | 45.15 | 51.06 | d | 57.55 | c | 60.33 | a | 67.65 | 65.89 | c | 65.14 | a | 54.50 | a | 48.58 | d | 39.88 | a | 53.40 | |||||
| 1977 | 38.89 | 46.39 | 46.70 | a | 53.68 | b | 54.34 | 65.12 | 67.14 | b | 72.65 | a | 61.09 | b | 55.55 | a | 44.97 | a | 44.02 | a | 54.21 | |||||
| 1978 | 42.50 | 47.64 | 50.73 | 51.27 | 56.39 | 66.63 | 69.45 | 68.31 | 61.40 | 58.06 | 42.40 | d | 36.84 | 54.30 | ||||||||||||
| 1979 | 32.48 | 42.27 | 51.10 | 52.80 | 59.77 | 64.21 | b | 70.26 | 68.23 | 66.19 | a | 57.47 | 44.67 | 45.02 | 54.54 | |||||||||||
| 1980 | 36.52 | 44.67 | 46.16 | 54.22 | a | 57.08 | 60.22 | a | 69.26 | 65.87 | a | 63.50 | c | 55.97 | 48.15 | 44.08 | 53.81 | |||||||||
| 1981 | 44.29 | 44.96 | 49.15 | 53.03 | 57.39 | 61.72 | 68.05 | 72.42 | 64.79 | a | 53.98 | 48.02 | 43.35 | 55.10 | ||||||||||||
| 1982 | 39.56 | 43.04 | 46.92 | 48.45 | 57.85 | 65.55 | 67.19 | 68.94 | 63.95 | 55.27 | 44.65 | 42.10 | 53.62 | |||||||||||||
| 1983 | 44.73 | 48.11 | 50.65 | 52.87 | 60.81 | ----- | z | 66.06 | 68.87 | 61.37 | 54.34 | 48.57 | 36.66 | 53.91 | ||||||||||||
| 1984 | 43.60 | 45.74 | ----- | z | 49.73 | 55.92 | 61.13 | 68.24 | 67.52 | ----- | z | 51.58 | 45.73 | 37.87 | a | 52.71 | ||||||||||
| 1985 | 37.35 | 40.84 | 44.76 | 53.12 | 57.31 | 63.95 | 72.98 | 67.89 | 60.63 | 53.56 | 38.62 | b | 35.89 | 52.24 | ||||||||||||
| 1986 | 45.21 | 45.11 | 52.68 | 50.83 | 58.31 | 66.88 | a | 65.16 | 72.29 | n | 55.00 | x | 56.55 | 47.75 | ----- | z | 54.27 | |||||||||
| 1987 | 41.39 | 46.89 | 49.53 | 56.55 | 61.19 | 66.93 | 67.00 | 69.87 | 65.67 | 59.24 | 48.57 | a | 39.97 | 56.07 | ||||||||||||
| 1988 | 39.98 | 46.03 | 47.98 | 53.70 | 57.66 | 63.47 | 69.18 | 67.68 | 65.00 | 59.69 | 47.55 | 41.56 | 54.96 | |||||||||||||
| 1989 | 43.18 | 38.12 | 46.71 | 57.60 | 58.89 | 66.32 | 66.05 | 66.42 | 66.03 | 55.23 | 48.93 | 40.65 | 54.51 | |||||||||||||
| 1990 | 44.31 | 43.41 | 50.61 | 55.93 | 57.50 | 64.57 | 70.65 | 70.58 | 67.83 | 53.81 | 48.47 | 34.95 | 55.22 | |||||||||||||
| 1991 | 41.79 | 50.46 | 47.24 | 51.57 | 55.06 | 60.38 | 70.29 | 69.16 | 68.23 | 56.69 | 47.57 | 42.50 | 55.08 | |||||||||||||
| 1992 | 45.56 | 50.00 | 53.98 | 55.92 | 64.65 | 67.65 | 70.65 | 71.55 | 63.33 | 56.98 | 47.02 | 39.68 | 57.25 | |||||||||||||
| 1993 | 38.21 | 42.25 | 50.68 | 53.07 | 62.50 | 62.90 | 64.56 | 69.52 | 66.55 | 59.11 | 41.88 | 41.89 | 54.43 | |||||||||||||
| 1994 | 44.84 | 42.66 | 51.34 | 54.75 | 61.45 | 62.45 | 71.02 | 69.66 | 67.37 | 55.25 | a | 42.22 | a | 43.45 | 55.54 | |||||||||||
| 1995 | 45.66 | 48.29 | 49.61 | 52.63 | 61.21 | 64.32 | 70.85 | 67.34 | 67.30 | 55.60 | 52.57 | 43.05 | 56.54 | |||||||||||||
| 1996 | 43.12 | a | 43.76 | 49.56 | 54.37 | 55.98 | 63.75 | 72.53 | 70.11 | 62.05 | 55.02 | 45.83 | 42.60 | 54.89 | ||||||||||||
| 1997 | 42.05 | 45.45 | 47.94 | 52.30 | 64.05 | 63.65 | 69.69 | 72.68 | 66.90 | 54.77 | 50.97 | 41.69 | 56.01 | |||||||||||||
| 1998 | 44.63 | 47.55 | 50.66 | 54.37 | 57.26 | 65.12 | 72.82 | 71.47 | 67.10 | 55.19 | 48.78 | 41.56 | 56.38 | |||||||||||||
| 1999 | 43.45 | 44.19 | a | 47.17 | a | 52.42 | 56.07 | a | 62.33 | a | 67.89 | i | 70.58 | r | 66.38 | b | 56.86 | c | ----- | z | 45.04 | d | 52.65 | |||
| 2000 | 41.43 | i | 45.76 | f | 46.57 | h | 55.59 | h | 58.71 | l | 66.72 | e | 69.91 | i | 68.21 | g | 64.43 | j | 55.87 | e | 44.15 | f | 41.72 | f | 61.29 | |
| 2001 | 43.35 | e | 43.56 | d | 49.84 | c | 51.41 | g | 56.11 | v | 62.81 | l | 68.40 | f | 69.84 | f | 65.19 | d | 54.58 | g | 48.63 | d | 43.12 | e | 48.95 | |
| 2002 | 42.15 | 46.16 | 45.69 | 53.65 | 56.69 | 64.33 | c | 70.07 | i | 69.06 | 65.62 | i | 55.68 | 48.38 | 43.71 | 52.55 | ||||||||||
| 2003 | 46.56 | 45.91 | 48.96 | g | 51.28 | 60.05 | l | 67.38 | m | 75.57 | x | 71.15 | 66.78 | 58.56 | 45.29 | b | 42.05 | 53.45 | ||||||||
| 2004 | 39.68 | 46.90 | ----- | z | 57.50 | c | 59.81 | 66.13 | 72.53 | 71.56 | 63.18 | 56.10 | b | 44.85 | d | 44.81 | g | 57.82 | ||||||||
| 2005 | 43.69 | 44.62 | 51.62 | c | 52.55 | 60.69 | 62.32 | e | 70.85 | g | 72.91 | o | 62.27 | o | 55.74 | 44.68 | 41.05 | 50.78 | ||||||||
| 2006 | 45.24 | 43.43 | 46.60 | 54.38 | ----- | z | 66.82 | 71.52 | 70.04 | g | 65.45 | h | 53.48 | f | 47.20 | e | 40.70 | d | 51.99 | |||||||
| 2007 | 38.23 | g | 45.14 | f | 51.00 | e | 52.16 | e | 58.76 | f | 64.19 | l | 71.47 | 69.91 | h | 63.23 | 53.21 | l | 44.64 | h | 40.98 | h | 59.47 | |||
| 2008 | 38.73 | 44.38 | i | 45.50 | i | 49.44 | f | ----- | z | 62.98 | d | ----- | z | 71.08 | 65.83 | ----- | z | 49.23 | 37.64 | c | 54.25 | |||||
| 2009 | 40.13 | 42.59 | 45.39 | 52.73 | 60.11 | 65.75 | 73.70 | a | 70.31 | 66.35 | 53.61 | 47.02 | 37.40 | 54.59 | ||||||||||||
| 2010 | 46.50 | 47.59 | 49.50 | 51.27 | 55.56 | 61.72 | 69.19 | 68.97 | 64.45 | 56.29 | 45.67 | 44.16 | 55.07 | |||||||||||||
| 2011 | 42.38 | a | 40.62 | 46.84 | b | 48.84 | a | 54.40 | 62.69 | c | 66.66 | 70.00 | d | 67.90 | a | ----- | z | 44.38 | a | 38.50 | b | 53.02 | ||||
| 2012 | 42.24 | b | 45.04 | d | 46.11 | h | 53.65 | 57.96 | c | 62.21 | b | 69.27 | e | 70.82 | i | 65.68 | e | 44.55 | 48.79 | a | 36.95 | 52.64 | ||||
| 2013 | 33.19 | 44.50 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.85 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 40.97 | 44.48 | 47.75 | 52.31 | 58.18 | 63.61 | 68.74 | 68.57 | 64.27 | 54.94 | 46.57 | 41.34 | 54.26 | |||||||||||||
| S.D. | 4.01 | 2.86 | 2.50 | 2.31 | 2.52 | 2.30 | 2.38 | 2.37 | 2.40 | 2.45 | 2.56 | 2.71 | 1.22 | |||||||||||||
| SKEW | -0.94 | 0.08 | 0.20 | -0.10 | 0.47 | 0.03 | -0.02 | 0.19 | -0.02 | -1.27 | -0.55 | -0.29 | 0.32 | |||||||||||||
| MAX | 48.02 | 50.97 | 53.98 | 57.60 | 64.65 | 67.65 | 73.70 | 73.98 | 68.45 | 59.69 | 52.57 | 47.24 | 57.25 | |||||||||||||
| MIN | 29.66 | 36.91 | 42.32 | 47.20 | 53.69 | 59.15 | 64.10 | 64.37 | 60.38 | 44.55 | 38.62 | 34.95 | 51.56 | |||||||||||||
| NO YRS | 63 | 62 | 58 | 61 | 58 | 60 | 58 | 57 | 59 | 60 | 62 | 61 | 49 | |||||||||||||