| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | 67.15 | r | 75.63 | 86.65 | 85.97 | 71.10 | 64.71 | 48.27 | 39.32 | 67.38 | ||||||||
| 1912 | 41.48 | 46.31 | 47.03 | 56.21 | a | 65.66 | b | 78.43 | b | 81.16 | 80.25 | c | 72.57 | 59.45 | 49.97 | 39.77 | 59.86 | |||||||||
| 1913 | 33.29 | 37.61 | 46.58 | 58.20 | 69.52 | 72.33 | 81.43 | h | ----- | z | 77.90 | 64.00 | 46.80 | 38.23 | 54.45 | |||||||||||
| 1914 | 40.29 | 41.93 | 57.42 | 59.03 | 71.61 | 74.03 | 88.32 | 89.77 | 73.57 | 61.97 | 52.50 | 28.06 | 61.54 | |||||||||||||
| 1915 | 36.03 | 39.54 | 52.81 | 62.97 | 60.42 | 75.80 | 83.77 | 91.71 | 75.37 | 68.19 | 46.53 | 40.68 | 61.15 | |||||||||||||
| 1916 | 31.00 | 46.45 | 54.71 | 61.73 | 63.71 | 73.63 | 83.42 | 85.13 | 78.20 | 59.13 | 44.00 | 34.35 | 59.62 | |||||||||||||
| 1917 | 24.55 | 34.11 | 38.23 | 52.40 | 61.10 | 76.79 | a | 91.13 | 88.55 | 79.37 | 70.61 | 52.67 | 47.42 | 59.74 | ||||||||||||
| 1918 | 42.03 | 41.96 | 50.60 | f | 60.87 | 66.77 | 87.70 | 87.06 | 83.35 | 76.33 | 63.94 | 44.47 | 34.13 | 62.60 | ||||||||||||
| 1919 | 36.65 | 38.36 | 46.48 | 62.27 | 74.23 | 79.53 | 91.06 | 89.71 | 74.63 | 56.52 | 46.63 | 39.13 | 61.27 | |||||||||||||
| 1920 | 49.71 | 54.00 | 49.16 | 57.80 | 69.06 | 76.47 | 86.35 | 88.42 | 73.67 | 55.97 | 45.23 | 39.13 | 62.08 | |||||||||||||
| 1921 | 38.84 | 44.11 | 54.45 | 59.73 | 66.90 | 78.20 | 89.45 | 87.37 | a | 75.30 | 73.13 | 55.13 | 44.35 | 63.91 | ||||||||||||
| 1922 | 34.55 | 38.11 | 45.48 | 54.63 | 71.55 | 85.33 | 92.68 | 87.39 | 85.81 | i | 65.13 | 46.13 | 41.68 | 60.24 | ||||||||||||
| 1923 | 41.52 | 42.88 | b | 54.00 | 57.20 | 69.77 | 73.40 | 90.16 | 89.13 | 80.27 | 60.00 | 56.17 | 40.81 | 62.94 | ||||||||||||
| 1924 | 38.82 | c | 50.34 | 47.94 | 65.77 | 81.35 | 85.96 | b | 91.45 | 89.77 | 79.77 | 59.77 | 48.37 | 32.58 | 64.33 | |||||||||||
| 1925 | 42.61 | 47.14 | 55.65 | 63.10 | 74.06 | 79.00 | 92.23 | 85.71 | 72.80 | ----- | z | 47.28 | a | 42.52 | 63.83 | |||||||||||
| 1926 | 39.65 | 45.11 | 59.13 | 66.47 | 70.39 | 87.03 | 92.19 | 87.26 | 73.40 | 66.52 | 52.89 | c | 38.52 | 64.88 | ||||||||||||
| 1927 | 40.48 | 41.59 | a | 48.68 | 56.77 | 65.32 | 77.69 | a | 87.97 | 84.42 | 68.80 | 61.50 | c | 47.43 | 34.03 | 59.56 | ||||||||||
| 1928 | 39.00 | 41.79 | 74.71 | 53.90 | 51.23 | 73.83 | 87.33 | a | 86.71 | 78.83 | 62.81 | 48.17 | 39.16 | 61.46 | ||||||||||||
| 1929 | 31.58 | 36.32 | 50.52 | 52.20 | 69.87 | 74.17 | a | 89.71 | 91.84 | 74.73 | 66.84 | 55.15 | d | 47.16 | 61.67 | |||||||||||
| 1930 | 32.42 | 46.00 | 53.81 | 62.80 | 65.85 | k | 79.20 | 89.61 | 86.97 | 73.60 | 59.84 | 48.13 | 38.13 | 60.96 | ||||||||||||
| 1931 | 38.97 | 44.75 | 52.90 | 62.43 | 75.52 | 76.20 | 93.35 | 90.45 | 73.17 | 61.87 | 43.47 | 34.90 | 62.33 | |||||||||||||
| 1932 | 32.68 | 34.72 | 48.87 | 56.90 | 66.19 | 79.13 | 85.00 | 84.77 | 81.20 | 62.55 | 52.87 | 33.48 | 59.86 | |||||||||||||
| 1933 | 34.65 | 31.39 | 48.71 | 60.00 | 63.75 | k | 79.60 | 91.65 | 86.90 | 73.40 | 68.23 | 51.83 | 45.35 | 61.06 | ||||||||||||
| 1934 | 45.26 | 47.39 | 62.26 | 69.37 | 73.29 | 75.37 | 89.52 | 91.16 | 78.90 | 63.84 | 49.60 | 39.32 | 65.44 | |||||||||||||
| 1935 | 37.94 | 43.21 | 45.03 | 56.83 | 68.26 | 80.70 | 86.52 | 88.58 | 82.93 | 58.35 | 41.77 | 39.32 | 60.79 | |||||||||||||
| 1936 | 37.06 | 40.28 | 48.29 | 57.63 | 65.35 | 74.47 | 91.48 | 89.16 | 77.40 | 67.77 | 52.47 | 39.19 | 61.71 | |||||||||||||
| 1937 | 23.61 | 36.82 | 48.19 | 56.37 | 74.00 | 78.00 | 90.42 | 87.81 | 81.07 | 63.29 | 50.17 | 43.90 | 61.14 | |||||||||||||
| 1938 | 39.06 | 39.07 | 43.61 | 58.37 | 69.00 | 81.77 | 88.03 | 86.13 | 80.20 | 59.16 | 42.17 | 43.00 | 60.80 | |||||||||||||
| 1939 | 40.58 | 37.00 | 54.71 | 67.93 | 71.68 | 76.63 | 89.65 | 90.58 | 78.47 | 62.65 | 53.53 | 48.29 | 64.31 | |||||||||||||
| 1940 | 42.32 | 44.97 | 55.97 | 62.20 | 73.58 | 84.83 | 83.86 | c | 89.68 | 73.57 | 65.50 | a | 46.83 | 44.07 | a | 63.95 | ||||||||||
| 1941 | 41.74 | 46.57 | 58.00 | 59.80 | 67.87 | a | 73.10 | 86.68 | 81.77 | a | 72.50 | 63.71 | 54.63 | 42.00 | 62.36 | |||||||||||
| 1942 | 36.87 | a | 40.89 | 52.10 | 61.17 | 62.56 | f | 74.43 | b | 88.97 | b | 88.16 | 80.47 | 70.13 | 51.13 | 42.32 | 62.42 | |||||||||
| 1943 | 39.32 | 45.39 | 54.71 | 64.63 | 66.87 | 70.27 | 85.90 | 84.97 | 86.07 | 63.90 | 50.20 | 42.68 | 62.91 | |||||||||||||
| 1944 | 36.13 | a | 42.52 | 52.52 | 57.60 | 68.93 | a | 69.47 | 83.81 | 85.71 | 79.11 | b | 71.26 | 43.17 | 42.61 | 61.07 | ||||||||||
| 1945 | 41.45 | 44.29 | 48.00 | 59.83 | a | 66.06 | 73.30 | 87.13 | a | 85.42 | 77.30 | 69.00 | 47.43 | 37.90 | 61.43 | |||||||||||
| 1946 | 41.13 | 43.29 | 51.55 | 63.93 | a | 70.58 | 74.50 | 84.59 | i | 88.68 | 77.17 | 59.52 | 49.33 | 44.03 | 60.34 | |||||||||||
| 1947 | 39.81 | 53.18 | 57.39 | 63.03 | 75.26 | 71.53 | 84.90 | 85.26 | 80.93 | 65.61 | 46.27 | 43.29 | 63.87 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.39 | 84.65 | 78.27 | 68.81 | 50.66 | a | 34.94 | 66.78 | ||||||
| 1949 | 26.03 | 39.18 | 49.35 | 68.90 | 70.74 | 77.73 | 87.97 | 86.55 | 81.27 | 65.13 | 61.90 | 43.45 | 63.18 | |||||||||||||
| 1950 | 34.90 | 47.38 | d | 49.77 | 62.17 | 69.71 | 76.20 | 88.55 | 89.94 | 77.27 | 68.43 | a | 55.67 | 48.23 | 64.02 | |||||||||||
| 1951 | 40.61 | 45.29 | 49.45 | 66.60 | 69.29 | 79.87 | 89.00 | 90.05 | i | 82.33 | 62.00 | 50.10 | 35.40 | a | 60.90 | |||||||||||
| 1952 | 34.23 | 41.79 | 43.94 | 65.27 | 71.47 | a | 74.50 | 85.71 | 85.71 | 81.47 | 76.03 | 50.00 | 40.65 | 62.56 | ||||||||||||
| 1953 | 46.10 | 48.68 | 53.00 | 60.40 | 59.84 | 70.83 | 86.74 | 82.26 | 83.23 | 66.39 | 53.27 | 43.43 | a | 62.85 | ||||||||||||
| 1954 | 41.10 | 55.82 | f | 49.45 | 64.83 | 75.06 | 73.70 | 86.68 | 81.06 | 78.17 | 68.42 | 57.03 | 39.90 | 65.04 | ||||||||||||
| 1955 | 35.55 | 40.25 | 48.77 | i | 52.07 | 68.17 | g | 79.30 | 82.87 | 90.71 | 79.30 | 71.77 | 50.37 | 41.87 | a | 62.41 | ||||||||||
| 1956 | 42.55 | 36.97 | 53.55 | 63.23 | 69.68 | 76.78 | c | 86.13 | 83.94 | 79.30 | 62.94 | 53.03 | 45.06 | 62.76 | ||||||||||||
| 1957 | 34.00 | 45.75 | 52.29 | 60.27 | 66.87 | 80.07 | 84.84 | 83.97 | 80.43 | 59.10 | 48.05 | i | 45.45 | 63.00 | ||||||||||||
| 1958 | 40.00 | 49.43 | 47.16 | 57.43 | 75.97 | 75.03 | 84.39 | 87.90 | 77.27 | d | 72.39 | 55.47 | 50.55 | 64.42 | ||||||||||||
| 1959 | 44.21 | c | 44.14 | 55.87 | 66.43 | 64.26 | 79.47 | 90.03 | 85.00 | 73.77 | 71.35 | 60.87 | 42.52 | 64.83 | ||||||||||||
| 1960 | 34.42 | 40.66 | 55.19 | 60.33 | 64.48 | 81.40 | 88.87 | 85.10 | 81.97 | 68.16 | 46.93 | 44.48 | 62.67 | |||||||||||||
| 1961 | 48.81 | 49.14 | 50.58 | 61.70 | 67.45 | 85.20 | 88.58 | 87.19 | 73.47 | 66.94 | 50.43 | 41.48 | 64.25 | |||||||||||||
| 1962 | 32.16 | 36.68 | 47.06 | 65.93 | 63.42 | 78.67 | 86.19 | 83.39 | 81.87 | 64.68 | 54.17 | 48.10 | 61.86 | |||||||||||||
| 1963 | 43.03 | 54.39 | 50.29 | 51.07 | 70.07 | a | 72.80 | 81.87 | 83.90 | 78.40 | 67.52 | 50.07 | 45.13 | 62.38 | ||||||||||||
| 1964 | 40.16 | 45.48 | 49.71 | 58.61 | b | 65.74 | 71.80 | 85.10 | 83.35 | ----- | z | 73.39 | 46.70 | 41.52 | 60.14 | |||||||||||
| 1965 | 37.94 | 49.07 | 55.39 | 60.10 | 66.42 | 75.33 | 84.10 | 79.90 | 73.70 | 74.39 | 51.87 | 40.77 | 62.41 | |||||||||||||
| 1966 | 40.97 | ----- | z | 56.55 | 66.30 | 75.61 | 74.97 | 84.16 | 87.84 | 80.10 | 69.61 | 51.63 | 42.58 | 66.39 | ||||||||||||
| 1967 | 43.26 | 50.04 | 49.81 | 48.17 | 71.55 | b | 77.20 | 88.87 | 91.26 | 83.34 | a | 68.68 | 55.77 | 36.81 | 63.73 | |||||||||||
| 1968 | 41.48 | 51.97 | 58.13 | 60.87 | 69.65 | 80.40 | 89.94 | 80.74 | 79.57 | 67.74 | 48.67 | 41.06 | 64.18 | |||||||||||||
| 1969 | 41.84 | 41.14 | 51.16 | 62.50 | 74.77 | 77.03 | 86.87 | 88.03 | 80.73 | 59.87 | 56.40 | 44.90 | 63.77 | |||||||||||||
| 1970 | 40.81 | 52.68 | 53.45 | 55.70 | 70.71 | 78.60 | 88.06 | 89.97 | 77.70 | 65.16 | 50.67 | 36.68 | 63.35 | |||||||||||||
| 1971 | 44.74 | 47.25 | 47.84 | 60.27 | 65.06 | 72.33 | 86.16 | 87.45 | 73.40 | 61.68 | 50.33 | 36.10 | 61.05 | |||||||||||||
| 1972 | 37.52 | 45.59 | 58.94 | 57.83 | 73.10 | 79.87 | 86.77 | 86.32 | 72.80 | 62.13 | 46.90 | 34.68 | 61.87 | |||||||||||||
| 1973 | 38.61 | 46.64 | 50.23 | 62.57 | 75.90 | 79.60 | 88.16 | 86.13 | 77.03 | 64.77 | 45.97 | 44.19 | 63.32 | |||||||||||||
| 1974 | 38.81 | 45.96 | 51.06 | 59.50 | 71.35 | 83.43 | 85.00 | 85.68 | 84.67 | 68.87 | 55.37 | 40.94 | 64.22 | |||||||||||||
| 1975 | 43.19 | 42.61 | 48.29 | 52.10 | 70.19 | 77.13 | 85.16 | 82.26 | 82.83 | 63.13 | 48.77 | 45.42 | 61.76 | |||||||||||||
| 1976 | 44.74 | 47.83 | 50.48 | 60.00 | 73.13 | 74.87 | 85.26 | 77.81 | 78.30 | 72.06 | 60.97 | 48.39 | 64.49 | |||||||||||||
| 1977 | 24.94 | 44.29 | 50.32 | 68.57 | 61.00 | 82.90 | 85.39 | 85.39 | 74.90 | 67.45 | ----- | z | 44.74 | 62.72 | ||||||||||||
| 1978 | 43.00 | 46.71 | 59.74 | 56.30 | 66.55 | 75.97 | 83.94 | 81.48 | 71.87 | 72.94 | 48.73 | 37.16 | 62.03 | |||||||||||||
| 1979 | 31.77 | 41.61 | 55.10 | 59.87 | 71.17 | a | 78.07 | 84.68 | 80.10 | 81.27 | 65.65 | 46.17 | 44.32 | 61.65 | ||||||||||||
| 1980 | 41.42 | 49.55 | 49.61 | 62.70 | 67.10 | 72.93 | 85.10 | 83.13 | 76.60 | 65.39 | 52.60 | 44.68 | 62.57 | |||||||||||||
| 1981 | 44.65 | 46.21 | 53.84 | 65.00 | 68.61 | 79.00 | 87.35 | 89.71 | 80.73 | 61.10 | 51.90 | 45.48 | 64.47 | |||||||||||||
| 1982 | 39.65 | 45.75 | 47.65 | 55.33 | 69.90 | 76.13 | 84.26 | 87.29 | 73.07 | 60.94 | 42.87 | 38.71 | 60.13 | |||||||||||||
| 1983 | 43.74 | 46.68 | 48.77 | 54.07 | 68.97 | 75.83 | 82.26 | 85.39 | 77.87 | 67.45 | 44.53 | 38.77 | 61.19 | |||||||||||||
| 1984 | 38.68 | 44.90 | 53.74 | 55.77 | 69.65 | 74.43 | 90.06 | 87.65 | 78.90 | 57.71 | 43.63 | 36.77 | 60.99 | |||||||||||||
| 1985 | 35.94 | 43.57 | 48.94 | 65.50 | 70.32 | 82.67 | 90.26 | 85.23 | 70.00 | 63.35 | 41.37 | 40.03 | 61.43 | |||||||||||||
| 1986 | 47.29 | 47.71 | 57.90 | 59.17 | 68.74 | 80.57 | 81.58 | 87.42 | 66.10 | 65.84 | 52.93 | 42.19 | 63.12 | |||||||||||||
| 1987 | 37.84 | ----- | z | 51.23 | 65.90 | 69.65 | 79.20 | 79.26 | 85.00 | 81.90 | 72.58 | 49.40 | 36.39 | 64.39 | ||||||||||||
| 1988 | 35.52 | 47.76 | 54.19 | 59.37 | 66.90 | 75.67 | 87.94 | 86.19 | 77.43 | 75.52 | 44.77 | 38.10 | 62.45 | |||||||||||||
| 1989 | 33.74 | 34.68 | 50.39 | 63.17 | 65.13 | 76.77 | 85.74 | 79.65 | 74.27 | 62.52 | 51.31 | a | 43.65 | 60.08 | ||||||||||||
| 1990 | 41.68 | 38.43 | 53.87 | 65.57 | 63.90 | 75.37 | 85.90 | 81.87 | 81.03 | 64.65 | 50.83 | 32.29 | 61.28 | |||||||||||||
| 1991 | 40.87 | 55.21 | 45.52 | 54.80 | 60.00 | 70.20 | 86.71 | 84.45 | 81.47 | 68.35 | 50.73 | 39.42 | 61.48 | |||||||||||||
| 1992 | 42.71 | 50.14 | 56.13 | 62.53 | 77.26 | 78.23 | 83.00 | 86.94 | 78.50 | 67.68 | 46.60 | 34.32 | 63.67 | |||||||||||||
| 1993 | 30.68 | 32.54 | 50.71 | 54.30 | 67.68 | 70.07 | 75.94 | 78.97 | 77.13 | 63.52 | 44.43 | 35.33 | a | 56.77 | ||||||||||||
| 1994 | 44.39 | 42.86 | 55.90 | 60.57 | 68.39 | 76.10 | 88.87 | 86.19 | 78.77 | 62.26 | 37.70 | 33.74 | 61.31 | |||||||||||||
| 1995 | 39.29 | 53.25 | 46.97 | 53.97 | 63.29 | 70.70 | 81.19 | 82.23 | 78.43 | 66.81 | 56.30 | 42.58 | 61.25 | |||||||||||||
| 1996 | 41.35 | 44.66 | 52.77 | 58.70 | 63.39 | 75.93 | 86.65 | 84.48 | 73.33 | 62.39 | 50.20 | 41.97 | 61.32 | |||||||||||||
| 1997 | 39.35 | 44.82 | 55.00 | 54.93 | 71.35 | 72.27 | 81.68 | 83.74 | 75.73 | 62.29 | 49.17 | 38.00 | 60.70 | |||||||||||||
| 1998 | 42.39 | 41.39 | 50.16 | 54.73 | 56.58 | 70.37 | 86.03 | 85.97 | 75.97 | 60.65 | 43.97 | 35.48 | 58.64 | |||||||||||||
| 1999 | 40.55 | 41.32 | 48.90 | 55.23 | 65.03 | 73.13 | 82.90 | 80.58 | 78.47 | 69.23 | 54.53 | 41.32 | 60.93 | |||||||||||||
| 2000 | 39.45 | 44.93 | 52.03 | 63.10 | 66.61 | 80.03 | ----- | z | 85.77 | 75.07 | 61.90 | 43.27 | 42.10 | 59.48 | ||||||||||||
| 2001 | 37.48 | 41.82 | 55.13 | 55.43 | 75.45 | 76.60 | 84.35 | 88.84 | 81.10 | 69.06 | 50.17 | 37.42 | 62.74 | |||||||||||||
| 2002 | 38.97 | 46.07 | 51.03 | 59.50 | 67.06 | 77.77 | 89.29 | 83.35 | 78.20 | 63.58 | 51.53 | 41.29 | 62.30 | |||||||||||||
| 2003 | 49.06 | 45.14 | 54.16 | 50.63 | 66.06 | 78.93 | 90.00 | 85.10 | 80.70 | 69.68 | 44.17 | 34.61 | 62.35 | |||||||||||||
| 2004 | 38.55 | 39.24 | 58.94 | 60.97 | 66.39 | 76.33 | 86.32 | 83.94 | 76.07 | 61.42 | 46.23 | 42.00 | 61.37 | |||||||||||||
| 2005 | 35.81 | 44.89 | 53.26 | 56.00 | 63.10 | 70.37 | 87.55 | 85.00 | 73.23 | 65.10 | 46.83 | 39.32 | 60.04 | |||||||||||||
| 2006 | 40.00 | 44.54 | 43.29 | 55.97 | 69.29 | 77.97 | 89.19 | 83.87 | 78.23 | h | 60.77 | ----- | z | ----- | z | 62.77 | ||||||||||
| 2007 | 36.42 | s | 46.36 | c | 58.94 | 57.87 | 67.71 | 73.17 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.72 | ||||
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 2009 | ----- | z | 41.68 | c | 47.90 | 56.87 | 69.42 | 74.07 | 86.38 | g | 85.52 | b | 82.67 | 59.19 | 46.43 | 33.59 | d | 59.73 | ||||||||
| 2010 | 40.45 | 43.17 | e | 50.55 | 52.83 | 58.10 | 71.90 | 86.39 | 82.58 | 77.90 | 62.52 | 44.20 | 39.03 | 59.14 | ||||||||||||
| 2011 | 39.42 | 39.68 | 44.16 | 51.93 | c | 60.40 | f | 71.14 | a | 83.34 | b | 85.45 | 81.80 | 62.00 | 44.70 | 39.92 | f | 60.36 | ||||||||
| 2012 | 43.31 | e | 43.55 | 48.77 | 58.60 | 68.16 | 73.50 | p | 86.97 | 88.72 | b | 81.93 | 64.26 | 49.70 | 36.68 | 60.97 | ||||||||||
| 2013 | 29.97 | 42.43 | 49.43 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.20 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.86 | 43.95 | 51.78 | 59.59 | 68.45 | 76.73 | 86.71 | 85.81 | 77.61 | 65.19 | 49.49 | 40.42 | 62.09 | |||||||||||||
| S.D. | 5.01 | 4.85 | 4.87 | 4.56 | 4.76 | 3.99 | 3.13 | 3.07 | 3.74 | 4.41 | 4.54 | 4.28 | 1.65 | |||||||||||||
| SKEW | -0.75 | -0.11 | 0.93 | -0.03 | -0.48 | 0.49 | -0.35 | -0.24 | -0.38 | 0.32 | 0.27 | -0.16 | -0.34 | |||||||||||||
| MAX | 49.71 | 55.21 | 74.71 | 69.37 | 81.35 | 87.70 | 93.35 | 91.84 | 86.07 | 76.03 | 61.90 | 50.55 | 65.44 | |||||||||||||
| MIN | 23.61 | 31.39 | 38.23 | 48.17 | 51.23 | 69.47 | 75.94 | 77.81 | 66.10 | 55.97 | 37.70 | 28.06 | 56.77 | |||||||||||||
| NO YRS | 98 | 97 | 97 | 99 | 94 | 98 | 96 | 98 | 97 | 99 | 97 | 98 | 77 | |||||||||||||