| 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 | 48.90 | 42.52 | 45.71 | |||
| 1912 | 35.34 | b | 45.31 | 52.94 | 64.27 | 74.23 | 87.47 | 92.52 | 89.13 | 76.73 | 64.03 | 51.60 | 38.58 | 64.35 | ||||||||||||
| 1913 | 32.77 | 39.61 | 49.68 | 69.50 | 78.42 | 84.87 | 91.81 | 96.35 | 84.60 | 65.74 | 51.23 | 40.10 | 65.39 | |||||||||||||
| 1914 | 39.23 | 42.93 | 61.10 | 68.13 | 80.57 | a | 83.33 | 98.90 | 97.00 | 79.27 | 68.61 | 53.37 | 32.35 | 67.07 | ||||||||||||
| 1915 | 33.55 | 48.57 | 63.84 | 74.55 | j | 69.87 | 84.30 | 93.32 | 102.00 | 79.85 | d | 72.68 | 46.83 | 38.29 | 66.65 | |||||||||||
| 1916 | 30.77 | 42.15 | i | 57.35 | 69.03 | 70.39 | 81.13 | 93.10 | b | 96.62 | r | 83.62 | d | 66.33 | a | 48.38 | a | 35.74 | 63.59 | |||||||
| 1917 | 28.29 | 38.48 | a | 43.26 | 60.10 | 73.97 | 84.54 | b | 102.29 | 99.10 | 86.53 | 72.32 | 54.23 | 46.57 | a | 65.81 | ||||||||||
| 1918 | 39.61 | 44.43 | 59.90 | 69.17 | 78.65 | 97.67 | 98.87 | 90.61 | 85.83 | 69.71 | 50.50 | 35.39 | 68.36 | |||||||||||||
| 1919 | 37.65 | 44.27 | b | 57.35 | 70.07 | 81.00 | a | 90.37 | 101.06 | 98.52 | 84.73 | 62.84 | 45.57 | 27.74 | 66.76 | |||||||||||
| 1920 | 32.52 | 46.45 | 54.10 | 62.83 | 75.19 | 84.40 | 97.90 | 96.26 | 82.37 | 61.65 | 48.07 | 38.65 | 65.03 | |||||||||||||
| 1921 | 38.71 | 41.50 | 58.13 | 63.17 | 76.94 | 90.03 | 99.68 | 97.68 | 77.70 | 72.97 | 56.10 | 39.45 | 67.67 | |||||||||||||
| 1922 | 26.81 | 38.64 | 50.74 | 62.00 | 75.13 | 94.40 | 100.19 | 97.45 | 90.10 | a | 73.32 | 49.63 | 33.87 | 66.02 | ||||||||||||
| 1923 | 39.65 | 41.39 | 55.42 | 67.13 | 75.29 | 81.20 | 99.52 | 97.94 | 88.47 | 65.23 | 54.10 | 38.10 | 66.95 | |||||||||||||
| 1924 | 31.52 | 53.24 | 55.00 | 69.60 | 87.81 | 89.30 | 98.97 | 95.74 | 86.03 | 68.71 | 49.93 | 28.97 | 67.90 | |||||||||||||
| 1925 | 34.13 | 46.86 | 60.03 | 69.57 | 81.32 | 88.43 | 103.20 | a | 95.74 | 83.47 | 67.42 | 51.57 | 39.52 | 68.44 | ||||||||||||
| 1926 | 36.52 | 50.82 | 63.32 | 74.07 | 75.71 | 87.03 | 97.03 | 91.10 | a | 75.10 | a | 70.42 | 53.50 | 36.55 | 67.60 | |||||||||||
| 1927 | 36.06 | 47.21 | 55.81 | 64.17 | 70.43 | a | 84.87 | 94.94 | 90.19 | 76.97 | a | 67.71 | 52.90 | 31.77 | 64.42 | |||||||||||
| 1928 | 34.58 | 42.21 | 57.35 | 63.13 | 84.46 | c | 83.77 | 95.58 | 91.29 | 83.93 | 68.65 | 52.07 | 35.45 | 66.04 | ||||||||||||
| 1929 | 27.58 | 33.75 | 57.16 | 62.47 | 77.84 | 82.13 | 96.42 | 97.84 | 77.83 | 73.03 | 53.97 | 44.29 | 65.36 | |||||||||||||
| 1930 | 25.77 | 47.68 | 61.74 | 72.83 | 74.13 | 84.27 | 97.00 | 94.06 | 79.90 | 66.06 | 49.03 | 34.10 | 65.55 | |||||||||||||
| 1931 | 34.77 | 43.64 | 57.42 | 68.17 | 80.94 | 86.57 | 98.39 | 94.81 | 81.27 | 69.94 | 48.47 | 34.42 | 66.57 | |||||||||||||
| 1932 | 31.95 | j | 37.66 | 52.32 | 67.17 | 75.81 | 86.97 | 93.03 | 91.87 | 84.80 | 67.84 | 50.50 | 34.29 | 67.48 | ||||||||||||
| 1933 | 36.68 | 30.32 | 50.45 | 65.86 | a | 69.62 | b | 87.03 | 96.65 | 93.16 | 80.43 | 75.23 | 54.20 | 44.55 | 65.35 | |||||||||||
| 1934 | 45.65 | 55.96 | 65.84 | 76.03 | 84.81 | 85.83 | 95.10 | 91.52 | 80.47 | 69.39 | 54.63 | 37.55 | 70.23 | |||||||||||||
| 1935 | 37.19 | 42.82 | 53.68 | 64.93 | 77.65 | 86.90 | 96.45 | 95.48 | 89.90 | 70.32 | 44.60 | 33.71 | 66.14 | |||||||||||||
| 1936 | 36.29 | 34.97 | 52.00 | 71.07 | 82.71 | 87.10 | 99.52 | 95.39 | 83.67 | 74.68 | 51.83 | 42.48 | 67.64 | |||||||||||||
| 1937 | 23.45 | 40.29 | 57.13 | 64.70 | 81.03 | 83.67 | 98.35 | 93.00 | 85.80 | 72.23 | 54.20 | 45.06 | 66.58 | |||||||||||||
| 1938 | 42.45 | 47.86 | 52.13 | 65.73 | 72.55 | 85.37 | 91.77 | 89.06 | 83.40 | 65.16 | 45.20 | 41.16 | 65.15 | |||||||||||||
| 1939 | 40.81 | 40.07 | 57.39 | 70.03 | 79.52 | 79.93 | 93.32 | 93.19 | 80.10 | 63.94 | 54.10 | 44.94 | 66.44 | |||||||||||||
| 1940 | 39.94 | 45.52 | 57.58 | 64.17 | 77.90 | 88.13 | 90.07 | b | 90.77 | 76.50 | f | 68.45 | 45.10 | 41.74 | 64.49 | |||||||||||
| 1941 | 39.52 | 48.39 | 62.48 | 68.47 | 75.45 | 81.30 | 94.84 | 89.06 | 74.40 | 65.16 | 52.87 | 41.84 | 66.15 | |||||||||||||
| 1942 | 29.55 | 42.50 | 55.68 | 70.93 | 70.97 | 80.23 | 95.35 | 92.58 | 83.90 | 69.10 | 47.90 | 38.00 | 64.72 | |||||||||||||
| 1943 | 37.13 | 45.86 | 55.48 | 70.70 | 74.65 | 79.70 | 95.55 | 93.00 | 89.80 | 70.84 | 52.40 | 44.00 | 67.43 | |||||||||||||
| 1944 | 34.55 | 49.17 | 56.81 | 68.90 | 79.74 | 81.70 | 92.45 | 91.74 | 83.50 | 75.68 | 48.07 | 36.26 | 66.55 | |||||||||||||
| 1945 | 37.74 | 48.46 | 54.32 | 64.53 | 74.65 | 80.50 | 95.87 | 93.39 | 78.47 | 71.19 | 48.80 | 38.94 | 65.57 | |||||||||||||
| 1946 | 38.45 | 42.71 | 57.32 | 69.73 | 78.10 | 82.97 | 94.68 | 94.03 | 79.93 | 61.71 | 49.30 | 45.00 | 66.16 | |||||||||||||
| 1947 | 34.29 | 51.07 | 62.13 | 67.87 | 82.52 | 77.70 | 95.58 | 91.77 | 82.07 | 68.39 | 48.60 | 41.84 | 66.99 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.26 | 79.67 | 70.10 | 47.60 | 31.68 | 63.86 | ||||||
| 1949 | 21.48 | 41.50 | 57.00 | 72.57 | 79.45 | 84.37 | 94.16 | 93.94 | 84.83 | 62.74 | 54.10 | 39.90 | 65.50 | |||||||||||||
| 1950 | 32.10 | 41.11 | 52.10 | 63.50 | 73.97 | 82.03 | 92.94 | 93.42 | 82.63 | 70.94 | 52.37 | 43.32 | 65.03 | |||||||||||||
| 1951 | 36.94 | 44.22 | a | 51.71 | 70.34 | a | 73.90 | 81.60 | 94.68 | 90.48 | 82.70 | 62.90 | 48.27 | 37.08 | e | 64.57 | ||||||||||
| 1952 | 32.55 | 36.93 | 48.55 | 70.73 | 77.32 | 82.34 | a | 92.97 | 93.06 | 85.20 | 76.39 | 49.90 | 38.81 | 65.40 | ||||||||||||
| 1953 | 47.60 | a | 48.93 | 58.10 | a | 64.31 | a | 69.65 | 77.07 | 95.52 | 90.19 | 86.37 | 70.60 | a | 55.13 | 40.77 | 67.02 | |||||||||
| 1954 | 44.45 | 49.27 | b | 55.48 | 67.00 | 79.23 | a | 76.87 | 92.35 | 86.48 | 78.43 | 65.35 | 53.83 | 38.65 | 65.62 | |||||||||||
| 1955 | 29.68 | 35.96 | 47.97 | 58.47 | 71.74 | 84.80 | 89.58 | 93.39 | 79.73 | 65.97 | 42.43 | 40.32 | 61.67 | |||||||||||||
| 1956 | 37.39 | 36.76 | 56.45 | 68.77 | 75.65 | 80.50 | 94.42 | 90.45 | 80.80 | 61.23 | 44.70 | 37.29 | 63.70 | |||||||||||||
| 1957 | 27.13 | 39.70 | a | 54.48 | 63.63 | 72.94 | 83.00 | 89.74 | 86.68 | 81.57 | 61.65 | 45.15 | j | 40.16 | 63.70 | |||||||||||
| 1958 | 35.06 | 47.46 | b | 51.71 | 60.38 | a | 80.32 | 83.27 | 90.97 | 93.10 | 78.67 | 69.26 | 49.17 | 42.77 | 65.18 | |||||||||||
| 1959 | 41.35 | 46.39 | 55.61 | 66.33 | 70.06 | 86.17 | 94.90 | 87.26 | 74.33 | 64.74 | 50.23 | 41.16 | 64.88 | |||||||||||||
| 1960 | 32.90 | 42.76 | 55.03 | 65.27 | 70.87 | 86.90 | 97.61 | 84.58 | 79.73 | 62.13 | 49.50 | 38.06 | 63.78 | |||||||||||||
| 1961 | 37.65 | 49.18 | 56.74 | 64.77 | 76.00 | 91.10 | 95.06 | 94.06 | 75.00 | 62.68 | 46.83 | 38.48 | 65.63 | |||||||||||||
| 1962 | 30.00 | 38.71 | 53.39 | 69.70 | 70.87 | 84.20 | 90.29 | 87.16 | 80.80 | 64.52 | 50.47 | 40.84 | 63.41 | |||||||||||||
| 1963 | 33.84 | 51.57 | 57.45 | 60.73 | 76.03 | 79.67 | 89.29 | 91.03 | 83.90 | ----- | z | 50.33 | 33.90 | 64.34 | ||||||||||||
| 1964 | 33.19 | ----- | z | 49.52 | 62.93 | 72.48 | 78.03 | 92.26 | 86.35 | 77.37 | 70.13 | 49.07 | 40.58 | 64.72 | ||||||||||||
| 1965 | 36.26 | 46.43 | 55.77 | 67.40 | 72.29 | 81.83 | 90.48 | 86.16 | 74.40 | 71.74 | 53.93 | 39.68 | 64.70 | |||||||||||||
| 1966 | 43.61 | 47.61 | 58.61 | 67.83 | 80.16 | 81.00 | 92.03 | 91.10 | 83.67 | 65.23 | 51.93 | 37.97 | 66.73 | |||||||||||||
| 1967 | 41.97 | 50.07 | 55.97 | 58.60 | 73.71 | 81.47 | 94.42 | 96.16 | 85.47 | 63.84 | 51.17 | 34.65 | 65.62 | |||||||||||||
| 1968 | 35.61 | 50.14 | 61.10 | 62.80 | ----- | z | 84.63 | 95.87 | 84.26 | 79.03 | 64.97 | 49.80 | 40.39 | 64.42 | ||||||||||||
| 1969 | 36.84 | 39.86 | 54.87 | 67.67 | 78.32 | 82.00 | 91.23 | 91.74 | 81.77 | 61.87 | 51.13 | 41.52 | 64.90 | |||||||||||||
| 1970 | 40.48 | 51.96 | 54.42 | 59.33 | 74.68 | 84.63 | 92.32 | 94.42 | 74.80 | 62.19 | 50.40 | 37.97 | 64.80 | |||||||||||||
| 1971 | 39.00 | 48.14 | 51.42 | 65.43 | 75.90 | 78.47 | 92.71 | 95.97 | 76.40 | 64.65 | 48.77 | 35.52 | 64.36 | |||||||||||||
| 1972 | 35.87 | 42.34 | 58.74 | 62.67 | 76.68 | 84.03 | 90.06 | 92.03 | 75.57 | 68.55 | 49.17 | 28.81 | 63.71 | |||||||||||||
| 1973 | 35.48 | 47.54 | 56.65 | 64.40 | 77.52 | ----- | z | 94.19 | 90.71 | 79.87 | 65.84 | 46.73 | 42.68 | 63.78 | ||||||||||||
| 1974 | 35.81 | 48.50 | 55.37 | a | 65.03 | 71.45 | 89.37 | 89.97 | 89.94 | 83.40 | 67.52 | 51.40 | 37.42 | 65.43 | ||||||||||||
| 1975 | 32.23 | 40.93 | a | 52.43 | a | 57.07 | 71.81 | 77.72 | a | 93.06 | 84.94 | 84.17 | a | 64.23 | 48.50 | 33.48 | 61.71 | |||||||||
| 1976 | 36.16 | 40.93 | 50.71 | 63.79 | a | 76.45 | 79.40 | 89.52 | 82.71 | 80.67 | 68.81 | 55.50 | 43.00 | 63.97 | ||||||||||||
| 1977 | 28.32 | 46.39 | 54.65 | 71.33 | 70.32 | 91.17 | 93.77 | 91.97 | 79.17 | 69.35 | 49.90 | ----- | z | 67.85 | ||||||||||||
| 1978 | 46.93 | c | ----- | z | 67.45 | 61.30 | 70.06 | 83.27 | 92.97 | 87.87 | a | 73.67 | 67.16 | 46.17 | 37.61 | 66.77 | ||||||||||
| 1979 | 25.94 | ----- | z | ----- | z | ----- | z | 74.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.24 | |||
| 1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.37 | 90.19 | 94.29 | 81.90 | 64.16 | 53.67 | 41.80 | a | 72.20 | |||||||
| 1982 | 32.48 | 35.89 | 52.63 | a | 60.17 | 72.61 | 80.73 | 85.68 | 91.00 | 76.57 | 63.77 | 44.43 | 36.65 | 61.05 | ||||||||||||
| 1983 | 37.65 | 47.79 | 56.39 | 61.33 | 73.52 | 82.80 | 88.19 | 91.42 | 79.50 | 68.00 | 52.03 | 33.16 | 64.31 | |||||||||||||
| 1984 | 31.48 | 36.76 | 53.97 | 61.77 | 71.61 | 78.53 | 92.13 | 91.42 | 76.47 | 61.61 | 48.03 | 29.52 | 61.11 | |||||||||||||
| 1985 | 25.87 | 36.04 | 50.26 | 70.08 | e | 74.87 | a | 84.77 | 97.68 | 86.68 | c | 70.14 | b | 62.32 | 37.10 | 21.52 | b | 59.78 | ||||||||
| 1986 | 32.58 | s | ----- | z | 61.74 | d | 65.10 | 75.06 | 89.10 | 87.10 | 94.52 | 74.83 | 69.74 | 53.10 | 38.58 | 70.89 | ||||||||||
| 1987 | 34.87 | 47.93 | 59.16 | ----- | z | 78.74 | 86.03 | 89.23 | 89.32 | 85.97 | 73.42 | 51.56 | e | 40.84 | 67.01 | |||||||||||
| 1988 | 31.48 | 44.66 | 58.26 | 67.42 | k | 75.53 | a | 85.43 | 93.47 | a | 91.39 | 80.10 | ----- | z | 48.60 | 33.71 | 64.26 | |||||||||
| 1989 | 28.74 | 29.96 | 52.74 | 70.23 | 73.58 | 85.43 | 92.74 | 84.94 | 80.57 | 64.58 | 48.40 | 38.64 | c | 62.55 | ||||||||||||
| 1990 | 41.74 | 46.46 | 65.52 | 70.32 | k | 72.13 | h | 82.83 | 92.77 | 91.10 | 87.77 | 62.03 | 49.50 | 28.50 | c | 64.82 | ||||||||||
| 1991 | 30.65 | 49.96 | 56.35 | 64.23 | ----- | z | ----- | z | 98.06 | ----- | z | 83.03 | 67.97 | 45.10 | 39.39 | 59.42 | ||||||||||
| 1992 | 38.10 | 50.79 | 66.06 | 70.00 | 83.06 | 87.13 | 87.23 | 90.77 | 80.03 | 67.90 | 42.70 | 33.97 | 66.48 | |||||||||||||
| 1993 | 31.03 | 34.07 | 48.55 | 62.47 | 77.61 | 76.20 | 79.58 | ----- | z | 78.13 | 62.40 | a | 42.00 | ----- | z | 59.20 | ||||||||||
| 1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1996 | 36.65 | 42.21 | 56.16 | 63.23 | 68.65 | 82.47 | 95.65 | 91.71 | 76.27 | 65.03 | b | 51.00 | 38.52 | 63.96 | ||||||||||||
| 1997 | 39.35 | 46.43 | 57.32 | 61.90 | 78.13 | 82.63 | 89.55 | 92.10 | 82.60 | 65.10 | 51.27 | 38.42 | 65.40 | |||||||||||||
| 1998 | 39.52 | 46.50 | 55.10 | 63.47 | 69.13 | 79.13 | 97.65 | 95.00 | 84.77 | 66.48 | 50.27 | 36.00 | 65.25 | |||||||||||||
| 1999 | 41.10 | 41.14 | 54.81 | 61.53 | 71.45 | 80.27 | 91.77 | 91.65 | 80.29 | b | 68.83 | a | 53.43 | 34.39 | 64.22 | |||||||||||
| 2000 | 36.10 | 47.62 | 54.61 | 68.93 | 74.16 | 86.83 | 93.35 | 94.58 | 78.07 | 63.97 | 40.83 | 35.58 | 64.55 | |||||||||||||
| 2001 | 32.29 | 40.04 | 56.97 | 60.63 | 77.84 | 82.83 | 91.74 | 94.90 | 84.20 | 65.68 | 52.53 | 34.52 | 64.51 | |||||||||||||
| 2002 | 36.10 | 40.39 | 52.00 | 65.03 | 75.26 | 86.77 | 98.10 | 88.94 | 81.60 | 64.97 | a | 50.70 | 41.16 | 65.08 | ||||||||||||
| 2003 | 41.90 | 49.36 | 58.90 | 61.67 | 75.61 | 88.17 | 99.00 | 93.97 | 82.27 | 71.13 | 45.60 | 43.26 | 67.57 | |||||||||||||
| 2004 | 31.13 | 39.69 | 62.03 | 68.93 | 72.81 | 85.63 | 94.90 | 90.10 | 78.07 | 65.84 | 45.83 | 40.29 | 64.60 | |||||||||||||
| 2005 | 34.74 | 46.25 | 57.77 | 62.90 | 73.00 | 79.03 | 94.45 | 92.90 | 78.57 | 64.97 | 43.63 | 30.06 | 63.19 | |||||||||||||
| 2006 | 39.35 | 42.57 | 51.87 | 65.33 | 76.06 | 86.03 | 99.68 | 91.71 | 82.10 | 65.32 | 49.03 | 37.71 | 65.57 | |||||||||||||
| 2007 | 38.55 | 46.68 | 60.35 | 64.40 | 78.19 | 84.87 | 100.39 | 91.68 | 79.73 | 63.00 | a | 49.73 | 37.48 | 66.25 | ||||||||||||
| 2008 | 31.29 | 40.72 | 50.58 | 60.00 | 75.48 | 82.03 | 95.10 | a | 93.68 | 80.47 | 65.84 | 50.57 | 37.48 | 63.60 | ||||||||||||
| 2009 | 33.61 | 42.18 | 51.52 | 64.67 | 75.35 | 79.37 | 92.68 | 91.13 | 85.33 | 58.35 | 48.80 | 32.68 | 62.97 | |||||||||||||
| 2010 | ----- | z | 44.18 | 55.19 | o | 61.23 | 64.97 | 77.10 | 91.77 | 94.00 | u | 80.80 | 68.39 | 46.47 | 34.10 | k | 66.86 | |||||||||
| 2011 | ----- | z | ----- | z | ----- | z | ----- | z | 69.75 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.83 | 40.00 | 42.92 | |||
| 2012 | 40.90 | b | 46.45 | 51.00 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.67 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.33 | 43.94 | 55.93 | 65.66 | 75.57 | 83.78 | 94.13 | 92.03 | 81.05 | 67.04 | 49.61 | 37.79 | 65.28 | |||||||||||||
| S.D. | 5.11 | 5.19 | 4.34 | 3.93 | 4.07 | 3.97 | 3.86 | 3.58 | 3.94 | 3.80 | 3.53 | 4.45 | 1.80 | |||||||||||||
| SKEW | -0.17 | -0.41 | 0.22 | 0.18 | 0.32 | 0.55 | -0.38 | -0.16 | -0.03 | 0.33 | -0.71 | -0.72 | -0.38 | |||||||||||||
| MAX | 47.60 | 55.96 | 67.45 | 76.03 | 87.81 | 97.67 | 103.20 | 102.00 | 90.10 | 76.39 | 56.10 | 46.57 | 70.23 | |||||||||||||
| MIN | 21.48 | 29.96 | 43.26 | 57.07 | 64.97 | 76.20 | 79.58 | 82.71 | 70.14 | 58.35 | 37.10 | 21.52 | 59.78 | |||||||||||||
| NO YRS | 92 | 90 | 92 | 89 | 91 | 92 | 94 | 91 | 94 | 93 | 96 | 94 | 75 | |||||||||||||