| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.42 | 37.42 | ||
| 1907 | 26.05 | 41.05 | 41.23 | ----- | z | 55.21 | 56.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.10 | ||||||
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 71.76 | j | 68.53 | 57.97 | a | 49.43 | b | 36.00 | 34.08 | 49.20 | ||||
| 1932 | 32.72 | a | 33.41 | 42.15 | 48.07 | 52.63 | 62.03 | 63.82 | 64.18 | 59.77 | 51.81 | 45.92 | 28.06 | 48.71 | ||||||||||||
| 1933 | 33.37 | 31.81 | d | 40.95 | 47.02 | a | 48.40 | 62.05 | 68.94 | 67.61 | 57.07 | 55.53 | 42.13 | 41.61 | 49.71 | |||||||||||
| 1934 | 41.89 | 41.41 | 49.63 | 56.78 | 59.47 | 61.46 | b | 68.23 | 69.53 | 60.00 | 53.11 | 45.24 | a | 35.61 | 53.53 | |||||||||||
| 1935 | 35.00 | a | 38.73 | 38.92 | 45.07 | 53.23 | 61.72 | 66.87 | ----- | z | 63.65 | 49.42 | 36.83 | a | 31.82 | 47.39 | ||||||||||
| 1936 | 35.56 | 27.90 | 40.94 | 51.67 | 58.69 | 63.53 | 68.73 | 68.29 | 58.93 | 55.18 | 37.52 | 37.74 | 50.39 | |||||||||||||
| 1937 | 15.18 | 34.52 | 41.19 | 46.42 | 55.78 | a | 61.47 | 68.53 | 66.08 | 61.32 | 58.68 | 49.40 | 37.50 | 49.67 | ||||||||||||
| 1938 | 34.39 | 34.98 | 41.47 | 48.93 | 54.08 | 63.27 | 70.53 | 64.85 | 64.52 | 51.31 | 37.93 | 35.03 | a | 50.11 | ||||||||||||
| 1939 | 37.98 | 33.98 | 43.73 | 51.63 | 57.18 | 58.73 | 69.84 | 67.63 | 62.00 | 53.65 | 45.95 | 41.52 | 51.98 | |||||||||||||
| 1940 | 30.40 | 39.40 | 42.07 | a | 44.35 | 54.55 | 66.72 | 68.76 | 71.02 | 60.35 | 54.18 | 39.42 | 38.82 | a | 50.83 | |||||||||||
| 1941 | 36.89 | 44.27 | 46.11 | 50.23 | 55.55 | 60.30 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.89 | |||||||
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.25 | 38.55 | 39.40 | |||
| 1943 | 28.76 | 40.12 | 42.03 | 50.85 | 51.37 | 58.43 | a | 68.18 | a | 64.06 | 64.43 | 52.21 | 41.58 | 31.39 | 49.45 | |||||||||||
| 1944 | 34.79 | 36.97 | 41.77 | 49.18 | 55.37 | 59.22 | 67.61 | 69.50 | 62.47 | 55.50 | 39.38 | 28.85 | 50.05 | |||||||||||||
| 1945 | 35.10 | 38.23 | 38.48 | 46.75 | 55.42 | 60.45 | 72.40 | 69.15 | 59.10 | 53.27 | 39.93 | 33.58 | 50.16 | |||||||||||||
| 1946 | 35.37 | 37.98 | 42.53 | 50.70 | 56.23 | ----- | z | ----- | z | 68.45 | 58.53 | 46.50 | 37.87 | 37.61 | 47.18 | |||||||||||
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | 43.73 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | 43.00 | z | 60.10 | 61.15 | 66.48 | b | 67.15 | 61.45 | 50.47 | 47.50 | e | 40.03 | 56.79 | |||||||
| 1950 | 32.50 | 38.86 | 42.60 | 45.65 | 54.47 | ----- | z | 65.11 | 61.50 | 56.70 | 47.56 | 37.44 | n | 43.54 | f | 49.44 | ||||||||||
| 1951 | 36.91 | h | 34.29 | 35.71 | 45.86 | a | 50.68 | 62.77 | d | 70.08 | e | 62.67 | e | 60.43 | 50.18 | 35.97 | 29.55 | 48.93 | ||||||||
| 1952 | 36.13 | 38.35 | e | 45.34 | o | 55.81 | q | ----- | z | 58.00 | z | 71.79 | 66.76 | 59.82 | s | ----- | z | 23.67 | x | 34.50 | 49.51 | |||||
| 1953 | 44.02 | a | 41.12 | 42.47 | 45.50 | 51.06 | 55.83 | 67.53 | 66.11 | 64.22 | 51.02 | 47.36 | a | 39.33 | a | 51.30 | ||||||||||
| 1954 | 34.66 | 40.41 | 38.16 | 47.73 | 55.50 | 56.05 | 67.03 | 63.13 | 57.82 | 48.39 | 45.12 | b | 35.15 | 49.10 | ||||||||||||
| 1955 | 33.31 | 34.86 | 37.15 | 42.82 | 50.34 | 61.18 | b | 60.69 | o | 64.71 | x | 58.15 | c | 51.19 | 35.48 | 34.27 | 43.87 | |||||||||
| 1956 | 35.40 | 29.82 | a | 41.05 | 49.67 | 56.33 | a | 58.57 | 65.62 | r | ----- | z | 61.22 | l | 48.27 | 35.40 | 36.74 | 43.47 | ||||||||
| 1957 | 19.42 | 36.39 | 41.98 | a | 48.18 | 56.03 | 63.90 | a | 66.10 | 63.35 | a | 61.74 | c | 45.45 | b | 36.03 | a | 37.77 | 48.03 | |||||||
| 1958 | 34.85 | 43.79 | 37.34 | 44.73 | 59.18 | 63.72 | 70.92 | 71.76 | 59.03 | 52.90 | 39.57 | 38.69 | 51.37 | |||||||||||||
| 1959 | 34.85 | a | 33.46 | 40.31 | 47.47 | 48.57 | a | 60.17 | 68.11 | 64.73 | 58.47 | 50.94 | 37.97 | 33.35 | 48.20 | |||||||||||
| 1960 | 27.74 | 34.64 | 41.84 | 47.20 | 51.08 | 63.12 | 72.26 | 64.44 | 61.35 | 51.15 | 37.58 | 31.90 | 48.69 | |||||||||||||
| 1961 | 35.10 | 41.57 | 42.10 | 45.72 | 52.19 | 66.30 | 70.76 | 71.47 | 54.45 | 47.31 | 34.90 | 32.66 | 49.54 | |||||||||||||
| 1962 | 28.27 | 35.29 | 37.92 | 49.48 | 48.27 | 56.00 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.85 | ||||||
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.81 | v | 67.48 | 66.38 | a | 56.58 | 56.25 | a | 43.53 | 31.28 | h | 58.05 | ||||
| 1966 | 37.47 | n | 36.63 | a | 43.23 | g | 50.87 | o | 54.12 | s | 62.25 | v | 63.53 | ----- | z | 61.53 | a | 51.98 | 49.44 | n | 38.70 | a | 50.48 | |||
| 1967 | 39.22 | b | 39.16 | f | 40.34 | c | 41.64 | b | 53.80 | d | 62.14 | b | 71.48 | h | 72.88 | b | 65.71 | a | 50.41 | c | 39.62 | i | 30.96 | h | 53.27 | |
| 1968 | 31.63 | e | 40.63 | c | 44.38 | g | 46.12 | e | 52.76 | 62.75 | b | 71.18 | a | 64.23 | 60.25 | d | 50.16 | f | 40.78 | c | 33.97 | n | 52.26 | |||
| 1969 | 26.71 | q | ----- | z | 42.12 | j | 46.86 | a | 56.86 | b | 63.68 | 66.32 | 64.60 | 58.78 | 43.97 | 38.72 | 33.77 | 52.62 | ||||||||
| 1970 | 33.58 | 38.45 | 39.11 | 41.78 | 53.52 | 65.43 | 70.16 | 68.81 | 55.10 | 46.87 | 40.32 | 32.02 | 48.76 | |||||||||||||
| 1971 | 35.52 | 36.84 | 38.77 | 45.70 | 54.89 | 58.45 | 68.82 | 71.97 | 53.50 | 43.23 | 38.83 | 33.34 | 48.32 | |||||||||||||
| 1972 | 32.03 | 37.88 | 45.13 | 44.55 | 56.94 | 63.45 | 69.95 | a | 69.82 | 55.95 | 47.08 | 39.38 | 27.65 | 49.15 | ||||||||||||
| 1973 | 31.37 | 38.59 | 41.92 | 45.87 | 57.02 | 62.82 | 67.90 | 65.21 | 57.07 | 46.12 | g | 39.25 | 38.97 | 49.63 | ||||||||||||
| 1974 | 28.53 | 39.72 | j | 39.87 | 45.85 | 51.74 | 65.77 | 66.13 | 66.58 | 61.28 | 47.90 | 39.45 | 34.94 | 49.82 | ||||||||||||
| 1975 | 35.82 | 33.32 | 37.52 | 40.75 | 51.92 | 55.53 | 68.48 | 63.40 | 61.10 | 49.47 | 38.87 | 36.05 | 47.69 | |||||||||||||
| 1976 | 33.90 | 34.00 | 38.98 | 43.78 | 54.53 | 57.02 | 66.52 | 62.00 | 60.98 | 50.02 | 40.27 | 33.34 | 47.95 | |||||||||||||
| 1977 | 26.44 | 37.59 | 39.32 | 51.30 | 47.55 | 63.98 | 66.98 | 71.77 | 56.47 | 48.06 | 35.95 | 36.60 | 48.50 | |||||||||||||
| 1978 | 33.69 | 37.98 | 45.37 | 44.68 | 49.52 | 61.00 | 67.56 | 66.66 | 56.78 | 50.98 | 31.75 | 28.58 | 47.88 | |||||||||||||
| 1979 | 16.32 | 36.11 | 44.00 | 45.48 | 54.48 | 61.60 | 68.69 | 66.24 | 62.44 | d | 51.92 | 33.20 | 38.35 | 48.24 | ||||||||||||
| 1980 | 28.56 | 37.81 | 39.18 | 48.25 | 54.55 | a | 56.07 | 67.37 | 62.76 | 61.02 | 50.65 | 42.70 | 39.21 | 49.01 | ||||||||||||
| 1981 | 34.68 | 37.21 | 42.13 | 46.80 | 53.53 | 60.83 | 68.06 | 73.40 | 63.15 | 48.56 | 42.32 | 36.77 | 50.62 | |||||||||||||
| 1982 | 32.56 | 35.88 | 40.55 | 43.92 | 52.00 | 64.73 | 68.31 | 69.74 | 57.65 | 48.40 | 37.13 | 32.39 | 48.60 | |||||||||||||
| 1983 | 39.61 | 41.38 | 45.21 | 45.32 | 57.26 | 60.37 | 64.95 | 70.42 | 58.25 | 50.95 | 42.38 | 24.84 | 50.08 | |||||||||||||
| 1984 | 33.44 | 38.66 | 44.90 | 44.02 | 52.00 | 57.67 | 71.03 | 68.08 | 58.58 | 46.39 | 38.40 | 29.73 | 48.57 | |||||||||||||
| 1985 | 26.76 | 33.48 | 40.77 | 50.90 | 55.47 | 65.25 | 75.56 | 65.53 | 54.15 | c | 48.60 | 26.83 | 23.90 | 47.27 | ||||||||||||
| 1986 | 38.68 | 40.50 | a | 46.73 | 45.73 | 55.58 | a | 68.92 | 64.61 | 73.73 | 55.17 | 50.42 | 41.50 | 33.90 | 51.29 | |||||||||||
| 1987 | 32.06 | 38.23 | 42.21 | 53.27 | 58.69 | 66.76 | a | 65.77 | ----- | z | 64.77 | 55.60 | 41.70 | 32.89 | 50.18 | |||||||||||
| 1988 | 31.90 | 38.95 | 43.18 | 50.28 | 54.08 | 61.82 | 71.13 | 68.87 | 61.85 | 60.42 | 41.55 | 34.05 | 51.51 | |||||||||||||
| 1989 | 35.63 | 25.77 | 41.68 | 51.65 | 53.00 | 64.12 | 68.76 | 65.40 | 60.97 | 51.21 | 42.98 | 34.05 | 49.60 | |||||||||||||
| 1990 | 35.73 | 36.20 | 43.42 | 51.95 | 53.42 | 61.08 | 72.31 | 69.66 | 66.32 | 51.85 | 42.75 | 24.05 | 50.73 | |||||||||||||
| 1991 | 32.47 | 45.20 | 40.00 | 44.75 | 50.42 | 56.12 | 69.92 | 72.76 | 65.75 | 52.79 | 43.92 | 36.45 | 50.88 | |||||||||||||
| 1992 | 37.56 | 41.67 | 46.35 | 50.88 | 59.35 | 67.95 | 68.42 | 71.18 | 59.93 | 53.31 | 38.10 | 31.38 | a | 52.17 | ||||||||||||
| 1993 | 23.55 | 28.38 | 42.71 | 45.77 | 59.13 | 58.70 | 62.40 | 66.77 | 61.98 | 54.65 | 33.80 | 35.31 | 47.76 | |||||||||||||
| 1994 | 38.92 | 35.59 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.25 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 32.78 | 37.05 | 41.56 | 47.27 | 54.20 | 61.60 | 68.37 | 67.47 | 59.94 | 50.88 | 39.71 | 34.34 | 49.63 | |||||||||||||
| S.D. | 5.53 | 3.95 | 2.74 | 3.22 | 3.09 | 3.27 | 2.52 | 3.24 | 3.12 | 3.43 | 4.18 | 4.18 | 1.45 | |||||||||||||
| SKEW | -1.18 | -0.55 | 0.42 | 0.46 | -0.13 | -0.01 | 0.12 | 0.13 | 0.02 | 0.29 | -0.20 | -0.63 | 0.59 | |||||||||||||
| MAX | 44.02 | 45.20 | 49.63 | 56.78 | 60.10 | 68.92 | 75.56 | 73.73 | 66.32 | 60.42 | 49.40 | 41.61 | 53.53 | |||||||||||||
| MIN | 15.18 | 25.77 | 35.71 | 40.75 | 47.55 | 55.53 | 62.40 | 61.50 | 53.50 | 43.23 | 26.83 | 23.90 | 47.27 | |||||||||||||
| NO YRS | 54 | 54 | 52 | 53 | 55 | 52 | 51 | 51 | 54 | 53 | 53 | 54 | 39 | |||||||||||||