| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1916 | ----- | z | ----- | z | 60.00 | m | 74.00 | a | 68.52 | f | 79.00 | a | 84.87 | a | ----- | z | 81.43 | b | 59.95 | l | 47.12 | e | ----- | z | 73.28 | |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | 69.81 | e | 80.15 | j | 89.17 | g | 91.03 | a | 81.50 | d | 71.24 | f | 55.95 | j | ----- | z | 80.78 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | 67.60 | p | ----- | z | ----- | z | 78.40 | k | 77.15 | d | 66.50 | c | 50.93 | a | ----- | z | 64.86 | |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | 77.94 | 81.90 | 87.97 | 87.90 | 78.23 | 59.69 | b | ----- | z | ----- | z | 78.94 | ||||||
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.59 | m | 91.39 | 87.58 | 76.83 | 61.03 | 48.53 | ----- | z | 73.07 | ||||||
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | 69.48 | 80.20 | 88.39 | 90.16 | 73.33 | 70.90 | ----- | z | ----- | z | 78.74 | |||||||
| 1922 | ----- | z | ----- | z | ----- | z | 58.17 | 69.16 | 84.00 | 89.17 | a | 88.25 | c | 83.00 | j | 72.52 | ----- | z | ----- | z | 76.88 | |||||
| 1923 | ----- | z | ----- | z | ----- | z | 62.47 | 68.16 | 73.97 | 90.35 | 87.58 | 81.43 | 61.10 | ----- | z | ----- | z | 75.01 | ||||||||
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | 80.29 | 81.43 | 89.74 | 89.97 | 90.25 | r | ----- | z | ----- | z | ----- | z | 85.36 | |||||
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | 76.16 | 79.70 | 92.74 | 87.47 | a | ----- | z | ----- | z | ----- | z | ----- | z | 84.02 | ||||
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.93 | a | 77.07 | 67.29 | 47.73 | 35.87 | 62.58 | |||||
| 1949 | 22.84 | 42.43 | 55.45 | 70.13 | 76.58 | 80.47 | 87.71 | 88.23 | 80.53 | 60.90 | 54.97 | 42.19 | 63.54 | |||||||||||||
| 1950 | 33.87 | 43.46 | 50.71 | 62.00 | 69.39 | 77.70 | 87.23 | 86.29 | 77.23 | 70.06 | 55.16 | e | 44.58 | 63.14 | ||||||||||||
| 1951 | 39.35 | 46.79 | 50.52 | 68.63 | 71.19 | 77.70 | 90.52 | 84.91 | i | 79.10 | 63.97 | 49.57 | 37.94 | 61.39 | ||||||||||||
| 1952 | 34.81 | 39.86 | 48.97 | 68.80 | 72.19 | 79.40 | 88.48 | 88.71 | 81.50 | 71.81 | 48.03 | 41.55 | 63.68 | |||||||||||||
| 1953 | 50.35 | 48.25 | 57.39 | 60.97 | 66.39 | 73.37 | 89.58 | 85.39 | 80.73 | 67.61 | 56.23 | 40.71 | 64.75 | |||||||||||||
| 1954 | 46.81 | 50.71 | 52.23 | 65.23 | 75.35 | 73.80 | 89.74 | 81.94 | 75.87 | 65.19 | 54.83 | 39.97 | 64.31 | |||||||||||||
| 1955 | 33.19 | 38.89 | 49.32 | 56.90 | 67.03 | 79.37 | 83.90 | 88.45 | 75.73 | 66.26 | 45.60 | 45.55 | 60.85 | |||||||||||||
| 1956 | 41.68 | 38.14 | 56.45 | 66.07 | 72.61 | 78.13 | 87.77 | 83.39 | 77.23 | 60.74 | 44.40 | 37.90 | 62.04 | |||||||||||||
| 1957 | 27.90 | 39.43 | 52.90 | 60.93 | 70.32 | 79.70 | 86.16 | 84.58 | 80.20 | 61.32 | 47.93 | 42.55 | 61.16 | |||||||||||||
| 1958 | 38.65 | 50.21 | 52.48 | 59.87 | 78.61 | 78.90 | 87.65 | 89.16 | 75.90 | 69.19 | 51.20 | 43.16 | 64.58 | |||||||||||||
| 1959 | 44.23 | 46.96 | 54.05 | i | 66.30 | 67.55 | 82.77 | 90.45 | 83.81 | 72.27 | 64.00 | 50.47 | 39.58 | 64.40 | ||||||||||||
| 1960 | 31.84 | 42.48 | 55.13 | 64.53 | 68.81 | 83.30 | 92.03 | 82.97 | 80.37 | 64.90 | 50.60 | 38.42 | 62.95 | |||||||||||||
| 1961 | 38.94 | 49.68 | 56.16 | 63.40 | 72.68 | 86.83 | 89.81 | 89.94 | 71.77 | 61.48 | 47.79 | a | 37.03 | 63.79 | ||||||||||||
| 1962 | 28.77 | 38.61 | 52.65 | 70.07 | 68.48 | 80.60 | 86.19 | 84.10 | 79.27 | 64.61 | 52.70 | 41.45 | 62.29 | |||||||||||||
| 1963 | 33.00 | 52.75 | 57.52 | 59.10 | 73.52 | 76.83 | a | 85.03 | 86.13 | 80.63 | 67.87 | 49.70 | 33.29 | 62.95 | ||||||||||||
| 1964 | 33.90 | 38.62 | 49.35 | 61.67 | 69.68 | 75.13 | 88.23 | 82.55 | 74.37 | 66.90 | 48.07 | 43.71 | 61.01 | |||||||||||||
| 1965 | 38.61 | 48.29 | 54.48 | 64.37 | 68.71 | 78.47 | 86.52 | 82.81 | 70.83 | 69.13 | 53.93 | 39.26 | 62.95 | |||||||||||||
| 1966 | 43.55 | 45.32 | 57.94 | 65.80 | 78.00 | 78.20 | 87.74 | 86.87 | 82.27 | 66.26 | 53.53 | 40.00 | 65.46 | |||||||||||||
| 1967 | 44.06 | 51.29 | 55.16 | 56.37 | 72.65 | 79.67 | 91.00 | 91.87 | 83.07 | 64.26 | 51.30 | 38.19 | 64.91 | |||||||||||||
| 1968 | 38.74 | 51.28 | 59.42 | 61.67 | 72.00 | 81.07 | 90.39 | 80.13 | 76.53 | 63.58 | 47.77 | 41.48 | 63.67 | |||||||||||||
| 1969 | 39.23 | 40.93 | 54.87 | 67.10 | 76.90 | 79.00 | 87.87 | 88.26 | 78.87 | 60.06 | 51.23 | 42.26 | 63.88 | |||||||||||||
| 1970 | 43.74 | 52.04 | 53.87 | 59.07 | 71.81 | 81.83 | 88.94 | 90.16 | 74.07 | 61.58 | 51.07 | 39.68 | 63.99 | |||||||||||||
| 1971 | 40.48 | 49.46 | 52.32 | 64.60 | 74.32 | 76.67 | 88.55 | 91.55 | 73.90 | 63.68 | 48.43 | 38.06 | 63.50 | |||||||||||||
| 1972 | 37.71 | 43.69 | 58.52 | 62.50 | 75.94 | 81.17 | 87.13 | 88.65 | 72.97 | 65.68 | 48.83 | 32.29 | 62.92 | |||||||||||||
| 1973 | 37.87 | a | 47.57 | 55.74 | 63.43 | 76.77 | 82.13 | 89.87 | 87.97 | 77.50 | 65.58 | 49.60 | 44.00 | a | 64.84 | |||||||||||
| 1974 | 38.29 | 48.64 | 54.84 | 64.53 | 70.29 | 86.17 | 86.61 | 87.87 | 82.80 | 65.68 | 51.87 | 39.16 | 64.73 | |||||||||||||
| 1975 | 34.52 | 43.32 | 52.48 | 55.50 | 71.03 | 77.33 | 90.35 | 82.29 | 80.20 | 64.35 | 48.83 | 38.35 | 61.55 | |||||||||||||
| 1976 | 39.19 | 45.03 | 50.61 | 62.10 | 77.00 | 78.17 | 88.84 | 82.65 | 77.57 | 65.52 | 52.47 | 39.52 | 63.22 | |||||||||||||
| 1977 | 27.10 | 44.14 | 54.03 | 70.40 | 66.77 | 85.13 | 87.42 | 87.29 | 76.47 | 66.81 | 50.67 | 44.35 | 63.38 | |||||||||||||
| 1978 | 43.52 | 46.14 | 60.48 | 61.47 | 69.94 | 79.73 | 87.55 | 85.71 | 75.47 | 69.06 | 46.13 | 35.74 | 63.41 | |||||||||||||
| 1979 | 24.52 | 42.43 | 57.35 | 64.07 | 74.00 | 83.60 | 89.03 | 85.48 | 83.93 | 67.42 | 45.40 | 42.10 | 63.28 | |||||||||||||
| 1980 | 38.74 | 47.45 | 54.19 | 68.20 | 70.81 | 78.33 | 88.13 | 84.19 | 76.70 | 66.45 | 48.97 | 40.29 | 63.54 | |||||||||||||
| 1981 | 39.29 | 47.64 | 58.03 | 64.93 | 69.81 | 78.77 | 88.35 | 91.29 | 80.73 | 63.48 | 53.37 | 43.42 | 64.93 | |||||||||||||
| 1982 | 35.65 | 41.46 | 54.79 | b | 61.37 | 72.39 | 79.77 | 84.94 | 88.00 | 75.43 | 64.32 | 45.33 | 38.10 | 61.80 | ||||||||||||
| 1983 | 40.23 | 49.93 | 55.71 | 59.60 | 72.48 | 79.00 | 84.45 | 88.00 | a | 77.67 | 65.90 | 51.63 | 32.52 | 63.09 | ||||||||||||
| 1984 | 30.45 | 38.21 | 54.94 | 60.93 | 70.39 | 76.77 | 89.16 | 88.84 | 75.37 | 61.26 | 48.40 | 34.32 | 60.75 | |||||||||||||
| 1985 | 30.58 | 38.29 | 50.84 | 68.63 | 74.00 | 83.67 | 93.00 | 84.68 | ----- | z | 61.87 | 38.77 | 21.29 | 58.69 | ||||||||||||
| 1986 | 35.94 | 49.86 | 61.71 | 63.03 | 72.68 | 86.23 | 83.87 | 90.32 | 70.30 | 66.87 | 52.30 | 35.65 | 64.06 | |||||||||||||
| 1987 | 35.94 | 48.21 | 56.97 | ----- | z | 77.68 | 82.53 | 84.61 | 85.00 | 81.40 | 70.68 | 51.77 | 40.87 | 65.06 | ||||||||||||
| 1988 | 32.87 | 47.07 | 57.29 | 66.70 | 72.42 | 84.10 | 89.52 | 86.84 | 76.20 | 74.00 | 50.33 | 33.55 | 64.24 | |||||||||||||
| 1989 | 29.97 | 28.46 | 52.06 | 67.40 | 70.77 | 81.53 | 89.84 | 83.61 | 79.13 | 63.32 | 50.57 | 39.55 | 61.35 | |||||||||||||
| 1990 | 42.35 | 44.50 | 59.45 | 70.00 | 69.45 | 80.23 | 88.26 | 86.00 | 84.17 | 64.84 | 52.40 | 30.19 | 64.32 | |||||||||||||
| 1991 | 31.35 | 49.21 | 56.10 | 62.67 | 67.39 | 77.07 | 89.87 | 89.10 | 80.97 | ----- | z | 46.53 | 41.26 | 62.86 | ||||||||||||
| 1992 | 41.84 | 53.24 | 64.77 | 69.97 | 80.32 | 84.03 | 85.55 | 91.13 | 80.80 | 70.06 | 43.43 | 37.90 | 66.92 | |||||||||||||
| 1993 | 34.45 | 37.86 | 51.16 | 60.70 | 77.03 | 75.60 | 78.65 | 82.52 | 79.23 | 67.48 | 45.80 | 43.48 | 61.16 | |||||||||||||
| 1994 | 39.06 | 44.18 | 64.03 | 68.00 | 75.61 | 82.50 | 91.48 | 91.26 | 83.53 | 66.58 | 43.00 | 37.26 | 65.54 | |||||||||||||
| 1995 | 43.97 | 54.39 | 56.97 | 63.40 | 71.68 | 77.13 | 86.32 | 86.06 | 81.07 | 65.10 | 53.67 | 40.74 | 65.04 | |||||||||||||
| 1996 | 42.32 | 47.03 | 58.29 | 64.87 | 69.65 | 81.20 | 91.65 | 89.68 | 76.17 | 65.55 | 52.83 | 45.81 | 65.42 | |||||||||||||
| 1997 | 41.58 | 48.89 | 61.13 | 62.63 | 77.71 | 80.43 | 86.97 | 90.13 | 81.40 | 66.90 | 54.07 | ----- | z | 68.35 | ||||||||||||
| 1998 | 47.03 | 49.68 | 57.23 | 62.60 | 68.32 | 77.63 | 92.42 | 90.74 | 83.53 | 66.71 | 54.03 | 40.61 | 65.88 | |||||||||||||
| 1999 | 46.32 | 47.36 | 57.58 | 63.93 | 70.77 | 78.57 | 87.55 | 88.87 | 78.47 | 69.41 | b | 53.67 | l | 39.94 | 66.25 | |||||||||||
| 2000 | 42.28 | b | 52.40 | i | 57.16 | ----- | z | 72.35 | 81.77 | 88.58 | 88.90 | 77.37 | 64.97 | 44.84 | k | 37.40 | k | 71.67 | ||||||||
| 2001 | 35.76 | j | 41.43 | 60.19 | j | 61.67 | i | 76.77 | 81.70 | 88.13 | 91.87 | 81.80 | 67.18 | i | 54.94 | n | 40.37 | l | 76.95 | |||||||
| 2002 | 41.00 | 46.89 | 55.42 | 65.80 | 72.58 | 82.24 | a | 92.16 | 84.71 | 80.17 | 65.00 | e | 53.15 | j | 45.32 | 66.48 | ||||||||||
| 2003 | 44.29 | 49.52 | e | 59.45 | i | 61.83 | 72.58 | 82.23 | 93.26 | 89.52 | 80.70 | 73.25 | g | 50.62 | n | 44.84 | l | 71.74 | ||||||||
| 2004 | 33.70 | k | 44.50 | i | 63.65 | h | 67.79 | b | 70.77 | 81.73 | 90.87 | 88.19 | 77.07 | 68.40 | f | 48.70 | j | 44.33 | j | 79.40 | ||||||
| 2005 | 40.38 | j | 48.53 | i | 59.26 | h | 64.58 | f | 72.19 | 78.53 | 91.97 | 90.47 | a | 77.80 | 66.59 | i | 46.42 | k | 36.20 | k | 82.19 | |||||
| 2006 | 43.81 | j | 48.53 | i | 54.78 | h | 66.08 | f | 75.32 | 82.87 | 94.23 | 87.94 | 79.13 | 66.04 | f | 54.37 | k | 41.65 | n | 83.90 | ||||||
| 2007 | 42.05 | i | 49.79 | i | 61.33 | j | 64.37 | 77.68 | ----- | z | 94.68 | 89.03 | 78.07 | 66.09 | i | 52.06 | l | 44.12 | o | 80.76 | ||||||
| 2008 | 36.76 | j | 47.15 | i | 53.52 | j | 62.07 | b | 71.87 | 80.38 | a | 89.77 | 89.58 | 77.83 | 66.42 | g | 51.24 | m | 40.30 | k | 78.58 | |||||
| 2009 | 36.25 | k | 44.61 | 51.94 | 63.46 | b | 74.39 | 78.20 | 89.00 | 87.23 | 84.03 | 59.06 | 50.00 | 33.12 | f | 68.19 | ||||||||||
| 2010 | 41.58 | 45.46 | 55.71 | 60.20 | 66.29 | 78.90 | 87.68 | 85.52 | 79.70 | 68.68 | 47.80 | 38.55 | 63.01 | |||||||||||||
| 2011 | 37.61 | 44.93 | 53.03 | 57.43 | 67.65 | 75.67 | 86.03 | b | 89.61 | 82.83 | a | 65.61 | 48.47 | 40.81 | 62.47 | |||||||||||
| 2012 | 43.42 | 47.69 | 57.39 | 67.10 | 72.06 | 82.17 | 91.68 | 90.50 | a | 82.04 | b | 65.84 | 53.37 | 43.94 | 66.43 | |||||||||||
| 2013 | 26.68 | 46.70 | a | 59.42 | 71.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.27 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.72 | 45.54 | 55.49 | 63.90 | 72.41 | 80.06 | 88.69 | 87.35 | 78.55 | 65.63 | 49.82 | 39.37 | 63.55 | |||||||||||||
| S.D. | 6.00 | 4.85 | 3.51 | 3.86 | 3.54 | 2.93 | 2.72 | 2.84 | 3.30 | 3.24 | 3.42 | 4.32 | 1.49 | |||||||||||||
| SKEW | -0.44 | -0.81 | 0.32 | 0.14 | 0.34 | 0.02 | -0.51 | -0.47 | -0.41 | 0.17 | -0.59 | -1.51 | 0.03 | |||||||||||||
| MAX | 50.35 | 54.39 | 64.77 | 74.00 | 80.32 | 86.83 | 94.68 | 91.87 | 84.17 | 74.00 | 56.23 | 45.81 | 66.92 | |||||||||||||
| MIN | 22.84 | 28.46 | 48.97 | 55.50 | 66.29 | 73.37 | 78.65 | 80.13 | 70.30 | 59.06 | 38.77 | 21.29 | 60.75 | |||||||||||||
| NO YRS | 58 | 59 | 57 | 62 | 71 | 70 | 72 | 72 | 71 | 63 | 58 | 55 | 47 | |||||||||||||