| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | 25.87 | 33.29 | 39.83 | 50.00 | 44.19 | 46.75 | v | 33.89 | l | 29.17 | 24.35 | 35.24 | ||||||||
| 1912 | 25.16 | 28.86 | h | 26.00 | b | 30.62 | n | 39.91 | h | 42.75 | f | 48.52 | 47.90 | 38.23 | d | 28.90 | a | 19.79 | p | 21.79 | b | 33.79 | ||||
| 1913 | 20.69 | e | 22.30 | h | 23.84 | l | 32.03 | a | 37.52 | 44.40 | 48.06 | 50.96 | h | 39.33 | i | 30.67 | j | 30.28 | a | 17.42 | 32.91 | |||||
| 1914 | 29.94 | 26.74 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.34 | ||
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1916 | ----- | z | ----- | z | 27.44 | v | 28.83 | 32.13 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.83 | ||
| 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 | 26.46 | r | 29.30 | 39.65 | 37.80 | 45.58 | 43.55 | 37.07 | 31.71 | 28.70 | ----- | z | 36.67 | |||||||||
| 1946 | ----- | z | 31.33 | y | 29.71 | 31.93 | a | 37.60 | a | 43.33 | 47.61 | 47.75 | z | 39.13 | 32.71 | 26.37 | 28.37 | a | 35.20 | |||||||
| 1947 | 20.10 | 27.43 | 29.35 | 33.63 | 40.55 | 42.50 | 47.87 | 44.26 | 40.33 | 36.23 | 31.23 | 26.58 | 35.01 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.69 | r | 40.77 | d | 29.28 | f | 26.52 | i | 16.34 | b | 28.56 | |
| 1949 | 3.36 | f | 20.18 | q | 26.88 | n | 31.03 | ----- | z | ----- | z | ----- | z | ----- | z | 36.07 | o | ----- | z | 29.23 | h | ----- | z | 31.03 | ||
| 1950 | 8.83 | b | 23.18 | 28.96 | d | 28.83 | 33.45 | 43.00 | e | 46.00 | g | 44.06 | ----- | z | 37.00 | 29.20 | 29.36 | f | 30.72 | |||||||
| 1951 | 19.12 | e | 23.89 | 22.20 | a | 27.90 | 36.47 | a | 39.63 | 44.26 | 40.13 | 37.43 | 31.82 | c | 25.20 | 19.13 | 30.60 | |||||||||
| 1952 | 16.55 | 23.90 | 24.58 | 29.93 | 37.32 | 43.00 | c | 43.90 | b | 42.11 | d | 40.63 | 32.74 | 19.37 | 25.17 | b | 31.60 | |||||||||
| 1953 | 34.55 | 26.04 | 27.32 | 30.00 | 35.90 | a | 38.60 | 42.94 | 45.61 | 40.43 | 31.97 | 34.62 | d | 28.26 | 34.69 | |||||||||||
| 1954 | 24.93 | a | 28.25 | 20.29 | 31.45 | a | 36.29 | 40.90 | 43.25 | c | 42.54 | c | 37.93 | 29.42 | 30.66 | a | 19.87 | 32.15 | ||||||||
| 1955 | 19.45 | 17.89 | a | 22.16 | 27.72 | a | 34.45 | 42.40 | 43.29 | 39.16 | 38.40 | 33.08 | g | 25.57 | 25.13 | a | 30.51 | |||||||||
| 1956 | 23.39 | 20.42 | c | 24.89 | c | 28.77 | 38.00 | b | 38.48 | c | 44.48 | 41.39 | 35.87 | 33.45 | b | 25.07 | 24.61 | 31.57 | ||||||||
| 1957 | 8.29 | 25.68 | 31.59 | d | 32.37 | 40.35 | 42.90 | 44.38 | g | 40.68 | c | 40.23 | 36.07 | c | 22.13 | g | 28.19 | 32.64 | ||||||||
| 1958 | 27.71 | 33.36 | 25.15 | d | 30.60 | 40.26 | 47.33 | 48.29 | g | 48.03 | 41.37 | 30.43 | c | 29.87 | 29.70 | a | 34.89 | |||||||||
| 1959 | 26.00 | 25.18 | 28.52 | 28.87 | 32.65 | 42.12 | e | 44.47 | a | 41.89 | d | 40.50 | f | 32.90 | 22.73 | 20.11 | d | 31.40 | ||||||||
| 1960 | 13.74 | 22.79 | 27.61 | 31.66 | a | 35.03 | a | 39.08 | e | 49.24 | n | 41.61 | 38.52 | a | 33.61 | 26.23 | 23.23 | a | 30.28 | |||||||
| 1961 | 27.26 | 30.16 | c | 30.55 | 30.90 | 35.48 | 43.27 | 44.29 | c | 48.45 | b | 34.37 | 30.87 | 22.07 | 24.67 | a | 33.53 | |||||||||
| 1962 | 18.10 | 24.68 | 26.00 | 31.93 | 35.55 | 41.16 | e | 43.29 | 44.94 | 41.43 | 34.55 | 31.90 | 26.77 | 33.36 | ||||||||||||
| 1963 | 14.10 | 30.54 | 26.03 | 31.93 | 37.23 | 41.57 | 42.67 | a | 44.39 | 46.10 | 35.74 | 31.73 | 24.26 | 33.86 | ||||||||||||
| 1964 | 26.74 | 20.03 | 24.55 | 27.83 | 33.29 | 42.77 | 46.90 | 43.13 | 35.80 | 31.65 | 28.47 | 24.81 | 32.16 | |||||||||||||
| 1965 | 26.90 | 26.21 | 21.29 | 32.77 | 31.15 | k | 41.32 | b | 45.42 | 46.13 | 33.87 | 34.06 | 32.37 | 21.20 | f | 34.03 | ||||||||||
| 1966 | 26.81 | 23.07 | 25.52 | 27.80 | 34.94 | 40.81 | c | 43.38 | g | 42.03 | 40.67 | 33.45 | 30.93 | 28.48 | 32.23 | |||||||||||
| 1967 | 29.16 | 25.93 | 26.65 | 28.53 | 33.94 | 42.91 | h | 44.00 | 46.13 | 42.37 | 35.10 | 27.87 | 21.35 | 32.82 | ||||||||||||
| 1968 | 24.48 | 31.07 | 28.87 | 25.77 | 35.48 | 40.70 | 44.61 | 47.06 | 40.17 | ----- | z | 30.23 | 21.42 | g | 34.85 | |||||||||||
| 1969 | 12.58 | 25.61 | 25.39 | 29.53 | 38.10 | 45.63 | ----- | z | ----- | z | 40.70 | 29.16 | 26.83 | 26.19 | 29.97 | |||||||||||
| 1970 | 25.32 | 31.04 | 27.00 | 26.07 | 35.42 | 45.17 | 47.74 | 43.03 | 36.43 | 30.23 | 28.13 | 25.32 | c | 33.41 | ||||||||||||
| 1971 | 29.79 | c | 24.29 | 26.61 | 29.37 | 37.65 | 39.77 | 44.03 | 46.45 | 35.03 | 29.61 | 27.93 | 25.42 | 33.00 | ||||||||||||
| 1972 | 22.87 | 26.21 | 30.87 | 27.50 | 37.42 | 42.93 | 46.61 | 45.87 | 37.87 | 30.52 | 31.33 | 15.32 | 32.94 | |||||||||||||
| 1973 | 21.03 | 27.43 | ----- | z | 28.87 | 37.19 | 41.93 | 44.68 | 41.90 | 41.48 | c | 33.61 | 30.37 | 30.42 | 34.45 | |||||||||||
| 1974 | 19.77 | 27.43 | 29.32 | 30.33 | 34.97 | 43.00 | 45.86 | c | 44.52 | 40.31 | d | 31.81 | 30.40 | 28.12 | e | 33.82 | ||||||||||
| 1975 | 26.32 | 23.50 | 26.45 | 26.13 | 35.10 | 41.63 | 49.61 | 42.45 | 37.60 | 37.26 | 29.43 | 28.23 | 33.64 | |||||||||||||
| 1976 | 25.94 | 24.86 | 25.45 | 28.80 | 35.23 | 37.47 | 46.35 | 47.45 | 42.13 | 32.03 | 32.90 | 20.35 | 33.25 | |||||||||||||
| 1977 | 17.32 | 26.39 | 25.65 | 31.17 | 34.28 | b | 43.87 | 45.58 | 50.16 | 40.03 | 33.48 | 26.92 | f | 28.65 | 34.23 | |||||||||||
| 1978 | 27.74 | 30.64 | 29.84 | 31.93 | 33.90 | 42.77 | 45.84 | 45.48 | 40.13 | 31.48 | 20.10 | ----- | z | 34.53 | ||||||||||||
| 1979 | 3.58 | 27.75 | 29.42 | 32.77 | 36.48 | 41.23 | 44.90 | 46.35 | 42.53 | 38.19 | 27.33 | 27.81 | 33.20 | |||||||||||||
| 1980 | 19.52 | 28.62 | 27.81 | 33.03 | 36.97 | 40.53 | 45.87 | 40.48 | 42.03 | 33.13 | 30.93 | b | 29.96 | g | 34.45 | |||||||||||
| 1981 | 26.81 | 26.54 | 29.29 | 32.17 | 37.45 | 42.47 | 43.77 | 45.23 | 40.67 | l | 34.10 | 29.97 | 26.71 | 34.04 | ||||||||||||
| 1982 | 21.35 | 26.04 | 27.16 | 27.60 | 34.35 | 44.83 | 46.55 | 46.03 | 40.77 | 33.19 | 25.93 | 25.26 | 33.26 | |||||||||||||
| 1983 | 29.61 | 33.18 | 33.65 | 29.97 | 37.35 | 41.05 | i | 45.65 | 48.26 | 37.27 | 35.55 | 33.57 | 17.19 | 34.66 | ||||||||||||
| 1984 | 24.65 | 28.55 | 32.00 | 31.07 | 36.74 | 40.50 | 44.74 | 45.26 | 38.70 | 32.26 | 30.73 | 21.87 | 33.92 | |||||||||||||
| 1985 | 20.19 | 22.75 | 24.58 | 32.83 | 36.55 | 41.03 | 48.16 | 43.16 | 37.10 | 31.39 | 17.10 | 11.39 | 30.52 | |||||||||||||
| 1986 | 27.90 | 28.86 | 32.58 | 28.00 | 37.06 | 45.83 | 43.47 | a | 46.97 | 38.47 | 33.10 | 31.13 | 25.68 | 34.92 | ||||||||||||
| 1987 | 22.16 | 26.50 | 29.26 | 33.53 | 38.65 | 42.23 | 45.10 | 42.77 | 38.90 | 31.52 | 28.20 | 23.97 | 33.57 | |||||||||||||
| 1988 | 24.26 | 24.96 | a | 26.29 | 35.07 | 35.48 | 42.27 | 46.06 | 41.55 | 37.93 | 37.55 | 32.07 | 21.48 | 33.75 | ||||||||||||
| 1989 | 27.23 | 13.75 | 30.52 | 34.77 | 36.03 | 42.00 | 43.00 | 42.90 | 37.13 | 33.26 | 28.70 | 20.87 | 32.51 | |||||||||||||
| 1990 | 28.84 | 23.79 | 27.58 | 36.20 | 35.52 | 44.07 | 47.29 | 48.06 | 42.90 | 34.13 | 29.80 | 14.48 | 34.39 | |||||||||||||
| 1991 | 21.68 | 30.57 | 27.19 | 29.77 | 36.26 | 40.50 | 47.32 | 48.06 | 39.10 | 31.32 | 31.70 | 26.58 | 34.17 | |||||||||||||
| 1992 | 28.03 | 30.55 | 28.19 | 35.73 | 38.13 | 43.90 | 45.48 | 44.52 | 40.03 | 34.97 | a | 28.13 | 20.42 | 34.84 | ||||||||||||
| 1993 | 14.26 | 17.96 | 30.90 | 33.00 | 41.55 | 41.80 | 41.94 | 43.61 | 35.52 | i | 35.32 | 16.57 | ----- | z | 31.69 | |||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 22.52 | 25.96 | 27.41 | 30.46 | 36.43 | 42.01 | 45.48 | 44.47 | 39.24 | 33.10 | 28.28 | 23.64 | 33.24 | |||||||||||||
| S.D. | 6.35 | 3.96 | 2.93 | 2.56 | 2.01 | 2.09 | 1.91 | 2.57 | 2.45 | 2.29 | 4.06 | 4.44 | 1.20 | |||||||||||||
| SKEW | -0.91 | -0.65 | -0.22 | 0.16 | 0.45 | 0.07 | 0.41 | 0.07 | 0.06 | 0.27 | -1.26 | -0.78 | -0.70 | |||||||||||||
| MAX | 34.55 | 33.36 | 33.65 | 36.20 | 41.55 | 47.33 | 50.00 | 50.16 | 46.10 | 38.19 | 34.62 | 30.42 | 35.01 | |||||||||||||
| MIN | 3.58 | 13.75 | 20.29 | 25.77 | 32.65 | 37.47 | 41.94 | 39.16 | 33.87 | 28.90 | 16.57 | 11.39 | 30.52 | |||||||||||||
| NO YRS | 48 | 46 | 46 | 51 | 48 | 47 | 44 | 47 | 45 | 46 | 47 | 44 | 27 | |||||||||||||