| 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 | 28.84 | 28.84 | ||
| 1907 | 16.68 | 31.04 | 30.97 | 23.00 | z | 40.23 | 38.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.46 | ||||||
| 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 | 54.52 | j | 51.00 | 43.90 | a | 37.07 | a | 26.77 | 26.39 | 37.02 | ||||
| 1932 | 24.53 | a | 24.00 | 32.97 | 34.03 | 40.29 | 45.83 | 47.29 | 48.23 | 42.47 | 38.32 | 35.17 | 16.42 | 35.80 | ||||||||||||
| 1933 | 24.32 | 20.40 | c | 30.42 | 33.43 | 36.10 | 46.60 | 51.16 | 50.87 | 42.23 | 39.84 | 30.47 | 33.74 | 36.63 | ||||||||||||
| 1934 | 31.90 | 31.71 | 35.74 | 41.50 | 44.71 | 46.17 | a | 51.16 | 52.48 | 44.30 | 40.71 | 37.20 | 28.97 | 40.55 | ||||||||||||
| 1935 | 26.90 | 28.54 | 28.13 | 32.90 | 37.16 | 46.93 | 50.81 | ----- | z | 46.57 | 36.19 | 26.03 | a | 23.58 | 34.89 | |||||||||||
| 1936 | 27.35 | 18.62 | 28.55 | 38.30 | 43.74 | 49.43 | 52.39 | 50.45 | 42.87 | 39.32 | 24.93 | 29.42 | 37.11 | |||||||||||||
| 1937 | 6.16 | 27.43 | 31.94 | 34.60 | 38.87 | a | 46.07 | 49.81 | 48.77 | 44.93 | 44.55 | 32.10 | 28.97 | 36.18 | ||||||||||||
| 1938 | 26.52 | 27.32 | 30.71 | 35.40 | 38.77 | 45.73 | 53.45 | 47.55 | 47.27 | 37.68 | 27.13 | 26.00 | a | 36.96 | ||||||||||||
| 1939 | 28.68 | 25.07 | 31.00 | 34.60 | 41.32 | 44.17 | 52.10 | 46.87 | 43.57 | 37.00 | 28.77 | 29.48 | 36.89 | |||||||||||||
| 1940 | 23.00 | 32.34 | 31.84 | 33.97 | 37.29 | 48.67 | 51.94 | 52.87 | 47.70 | 40.74 | 28.97 | 28.67 | a | 38.17 | ||||||||||||
| 1941 | 27.65 | 38.11 | 33.16 | 38.53 | 42.13 | 46.70 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.71 | |||||||
| 1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.33 | 30.00 | 30.17 | |||
| 1943 | 18.94 | 28.07 | 29.42 | 35.53 | 36.65 | 46.53 | 50.07 | a | 46.74 | 45.13 | 39.65 | 30.80 | 23.55 | 35.92 | ||||||||||||
| 1944 | 23.65 | 26.97 | 28.45 | 34.77 | 39.03 | 44.30 | 48.48 | 50.94 | 44.17 | 38.61 | 30.07 | 20.97 | 35.87 | |||||||||||||
| 1945 | 25.87 | 26.93 | 27.10 | 31.57 | 40.35 | 43.33 | 52.65 | 49.39 | 41.03 | 36.13 | 29.83 | 25.29 | 35.79 | |||||||||||||
| 1946 | 24.94 | 27.00 | 29.77 | 33.63 | 37.81 | ----- | z | 40.00 | z | 45.39 | 41.37 | 31.55 | 26.20 | 27.48 | 32.51 | |||||||||||
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | 32.31 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | 36.67 | z | 47.26 | 44.10 | 49.52 | b | 51.71 | 45.50 | 35.61 | 32.90 | 31.26 | 42.23 | ||||||||
| 1950 | 20.42 | 25.32 | 31.84 | 33.83 | 39.35 | ----- | z | 45.45 | 39.26 | 38.80 | 31.45 | 32.25 | n | 34.04 | f | 33.97 | ||||||||||
| 1951 | 24.60 | a | 25.61 | 29.48 | 30.10 | a | 34.39 | 47.04 | d | 49.04 | e | 43.23 | e | 41.30 | 32.87 | 23.87 | 21.23 | 33.56 | ||||||||
| 1952 | 27.77 | 24.92 | e | 32.94 | o | 41.77 | q | ----- | z | 46.50 | z | 55.61 | 49.90 | 43.64 | s | ----- | z | 11.33 | x | 27.13 | 37.07 | |||||
| 1953 | 36.57 | a | 32.36 | 31.10 | 33.00 | 38.65 | 42.03 | 49.10 | 51.13 | 48.00 | 37.39 | 37.66 | a | 31.57 | a | 39.04 | ||||||||||
| 1954 | 26.10 | 30.36 | 24.71 | 33.60 | 38.87 | 41.53 | 48.87 | 47.84 | 43.43 | 34.10 | 34.55 | a | 25.00 | 35.75 | ||||||||||||
| 1955 | 23.13 | 23.86 | 24.42 | 30.93 | 35.52 | 44.83 | a | 47.44 | o | 45.14 | x | 42.30 | c | 38.00 | 26.60 | 26.06 | 31.56 | |||||||||
| 1956 | 27.61 | 21.28 | 29.16 | 35.60 | 43.83 | a | 44.70 | 49.46 | r | ----- | z | 45.33 | l | 36.94 | 25.80 | 27.65 | 32.51 | |||||||||
| 1957 | 10.03 | 27.75 | 32.81 | 36.50 | 44.74 | 49.52 | a | 49.71 | 46.97 | a | 45.32 | b | 34.93 | b | 24.69 | a | 27.45 | 35.87 | ||||||||
| 1958 | 25.71 | 34.21 | 25.55 | 31.93 | 43.52 | 50.87 | 54.42 | 54.48 | 43.43 | 36.94 | 28.03 | 28.35 | 38.12 | |||||||||||||
| 1959 | 25.70 | a | 24.71 | 27.45 | 31.97 | 34.67 | a | 43.93 | 48.39 | 47.32 | 46.00 | 38.52 | 25.67 | 24.42 | 34.90 | |||||||||||
| 1960 | 19.42 | 24.76 | 30.39 | 35.13 | 39.23 | 46.37 | 54.19 | 48.16 | 44.77 | 37.74 | 27.17 | 23.90 | 35.94 | |||||||||||||
| 1961 | 26.52 | 32.57 | 32.10 | 32.53 | 39.84 | 50.03 | 53.35 | 54.00 | 37.70 | 33.19 | 23.10 | 23.42 | 36.53 | |||||||||||||
| 1962 | 16.97 | 25.07 | 27.29 | 34.33 | 35.71 | 39.00 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.87 | ||||||
| 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 | 46.25 | v | 48.61 | 49.33 | a | 39.33 | 37.93 | a | 32.40 | 19.17 | h | 41.52 | ||||
| 1966 | 28.11 | m | 25.70 | a | 28.54 | g | 32.47 | o | 36.58 | s | 44.50 | v | 43.45 | ----- | z | 41.48 | a | 33.26 | 35.06 | l | 31.53 | a | 35.09 | |||
| 1967 | 31.62 | b | 27.78 | e | 29.50 | c | 31.00 | b | 39.81 | d | 47.75 | b | 52.75 | g | 54.48 | b | 48.34 | a | 35.48 | b | 29.36 | h | 22.12 | g | 38.42 | |
| 1968 | 20.50 | e | 31.81 | c | 30.92 | f | 32.24 | e | 38.48 | 48.36 | b | 53.23 | a | 50.39 | 44.46 | d | 36.62 | e | 31.81 | c | 22.65 | n | 38.79 | |||
| 1969 | 14.93 | q | ----- | z | 27.14 | j | 32.69 | a | 41.47 | a | 49.90 | 48.97 | 45.58 | 42.00 | 30.16 | 26.90 | 26.26 | 38.21 | ||||||||
| 1970 | 25.84 | 29.36 | 28.45 | 30.07 | 38.52 | 50.77 | 52.19 | 49.29 | 39.43 | 33.10 | 30.97 | 25.13 | 36.09 | |||||||||||||
| 1971 | 28.26 | 26.86 | 29.42 | 33.07 | 41.32 | 44.30 | 51.77 | 53.48 | 37.50 | 30.32 | 30.87 | 26.87 | 36.17 | |||||||||||||
| 1972 | 24.77 | 28.66 | 33.77 | 32.77 | 42.42 | 48.37 | 53.07 | a | 52.55 | 40.77 | 35.19 | 31.90 | 19.35 | 36.97 | ||||||||||||
| 1973 | 24.06 | 30.71 | 31.19 | 32.70 | 42.00 | 46.83 | 49.19 | 47.68 | 42.83 | 34.25 | g | 33.20 | 32.32 | 37.52 | ||||||||||||
| 1974 | 20.58 | 28.89 | j | 28.48 | 33.27 | 37.42 | 47.03 | 48.97 | 48.55 | 40.67 | 30.61 | 28.77 | 25.94 | 35.48 | ||||||||||||
| 1975 | 26.00 | 23.11 | 24.84 | 28.13 | 36.03 | 37.87 | 51.23 | 45.29 | 42.00 | 37.65 | 28.27 | 26.87 | 33.94 | |||||||||||||
| 1976 | 23.90 | 22.10 | 27.42 | 31.83 | 36.81 | 41.07 | 47.23 | 47.52 | 43.47 | 32.48 | 30.83 | 22.35 | 33.92 | |||||||||||||
| 1977 | 17.06 | 26.93 | 28.61 | 35.03 | 36.84 | 47.47 | 49.26 | 54.55 | 41.23 | 33.87 | 25.73 | 28.77 | 35.45 | |||||||||||||
| 1978 | 26.42 | 29.39 | 32.13 | 33.60 | 34.52 | 45.70 | 51.55 | 50.10 | 42.90 | 33.39 | 20.60 | 19.23 | 34.96 | |||||||||||||
| 1979 | 7.52 | 27.50 | 32.13 | 34.87 | 39.26 | 43.57 | 50.03 | 49.45 | 44.53 | 39.10 | 23.53 | 29.55 | 35.09 | |||||||||||||
| 1980 | 19.42 | 29.79 | 30.42 | 34.60 | 40.20 | a | 42.83 | 50.26 | 45.13 | 43.97 | 36.48 | 32.97 | 29.13 | 36.27 | ||||||||||||
| 1981 | 27.35 | 26.39 | 30.74 | 33.47 | 41.35 | 47.03 | 50.52 | 54.03 | 46.57 | 35.32 | 31.97 | 28.77 | 37.79 | |||||||||||||
| 1982 | 22.81 | 26.39 | 29.35 | 30.77 | 37.48 | 51.47 | 52.77 | 53.03 | 43.83 | 35.42 | 27.47 | 25.45 | 36.35 | |||||||||||||
| 1983 | 30.61 | 32.36 | 36.03 | 33.13 | 42.90 | 47.33 | 49.74 | 54.06 | 41.97 | 36.32 | 34.27 | 16.48 | 37.93 | |||||||||||||
| 1984 | 22.71 | 29.10 | 33.97 | 33.43 | 38.48 | 44.60 | 53.19 | 48.58 | 41.67 | 34.81 | 29.43 | 20.71 | 35.89 | |||||||||||||
| 1985 | 18.94 | 21.93 | 28.32 | 37.23 | 39.16 | 49.07 | 57.55 | 48.97 | 41.00 | c | 34.35 | 16.70 | 16.00 | 34.10 | ||||||||||||
| 1986 | 28.94 | 32.37 | a | 34.52 | 31.50 | 41.35 | 52.10 | 48.90 | 56.29 | 41.97 | 36.03 | 31.73 | 26.65 | 38.53 | ||||||||||||
| 1987 | 22.55 | 28.43 | 31.35 | 36.23 | 44.55 | 50.63 | 51.19 | ----- | z | 47.03 | 37.71 | 29.60 | 25.16 | 36.77 | ||||||||||||
| 1988 | 22.81 | 25.07 | 29.10 | 35.70 | 38.74 | 47.83 | 54.10 | 49.81 | 44.33 | 43.68 | 33.03 | 24.10 | 37.36 | |||||||||||||
| 1989 | 26.45 | 14.86 | 30.58 | 38.10 | 39.65 | 47.07 | 50.97 | 50.26 | 43.60 | 36.94 | 31.03 | 21.52 | 35.92 | |||||||||||||
| 1990 | 27.84 | 24.00 | 30.23 | 36.40 | 39.00 | 47.03 | 53.97 | 53.97 | 47.70 | 37.68 | 32.03 | 13.48 | 36.94 | |||||||||||||
| 1991 | 22.65 | 33.11 | 29.77 | 32.67 | 37.84 | 40.17 | 49.94 | 55.42 | 47.17 | 37.23 | 36.83 | 25.58 | 37.36 | |||||||||||||
| 1992 | 28.77 | 29.93 | 31.97 | 36.30 | 40.94 | 50.87 | 52.03 | 52.58 | 41.90 | 37.61 | 28.53 | 23.61 | 37.92 | |||||||||||||
| 1993 | 14.81 | 19.29 | 31.55 | 33.23 | 42.16 | 43.60 | 46.06 | 48.97 | 44.73 | 39.06 | 20.67 | 26.87 | 34.25 | |||||||||||||
| 1994 | 28.68 | 25.29 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.98 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 23.81 | 27.17 | 30.20 | 33.89 | 39.61 | 46.24 | 50.76 | 49.90 | 43.38 | 36.35 | 29.19 | 25.61 | 36.37 | |||||||||||||
| S.D. | 5.65 | 4.23 | 2.57 | 2.39 | 2.84 | 3.21 | 2.61 | 3.39 | 2.59 | 3.02 | 4.26 | 4.31 | 1.48 | |||||||||||||
| SKEW | -1.06 | -0.26 | -0.11 | 0.53 | 0.34 | -0.48 | -0.14 | -0.46 | -0.07 | 0.12 | -0.42 | -0.75 | 0.36 | |||||||||||||
| MAX | 36.57 | 38.11 | 36.03 | 41.50 | 47.26 | 52.10 | 57.55 | 56.29 | 48.34 | 44.55 | 37.66 | 33.74 | 40.55 | |||||||||||||
| MIN | 6.16 | 14.86 | 24.42 | 28.13 | 34.39 | 37.87 | 43.45 | 39.26 | 37.50 | 30.16 | 16.70 | 13.48 | 33.56 | |||||||||||||
| NO YRS | 55 | 55 | 52 | 53 | 55 | 52 | 51 | 51 | 54 | 54 | 53 | 54 | 40 | |||||||||||||