| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1916 | ----- | z | ----- | z | 46.14 | m | 55.34 | a | 53.20 | f | 62.19 | a | 69.65 | a | ----- | z | 62.29 | b | 45.47 | l | 32.82 | e | ----- | z | 56.46 | |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | 57.85 | e | 65.07 | j | 73.04 | g | 73.17 | a | 64.23 | d | 53.28 | f | 41.40 | j | ----- | z | 65.08 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | 46.70 | p | ----- | z | ----- | z | 70.32 | k | 70.31 | d | ----- | z | 40.81 | a | ----- | z | 55.56 | |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | 66.19 | 69.73 | 74.32 | 71.97 | 63.58 | 50.97 | b | ----- | z | ----- | z | 66.13 | ||||||
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.85 | m | 74.85 | 71.26 | 61.07 | 48.45 | 39.68 | ----- | z | 59.06 | ||||||
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | 56.92 | 66.42 | 72.18 | 72.50 | 57.15 | 53.71 | ----- | z | ----- | z | 63.15 | |||||||
| 1922 | ----- | z | ----- | z | ----- | z | 45.97 | 55.48 | 67.97 | 73.17 | b | 72.88 | c | 63.15 | j | 55.31 | ----- | z | ----- | z | 61.80 | |||||
| 1923 | ----- | z | ----- | z | ----- | z | 49.08 | 55.42 | 61.20 | 73.02 | 71.31 | 63.78 | 48.77 | ----- | z | ----- | z | 60.37 | ||||||||
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | 63.19 | 65.88 | 72.23 | 70.74 | 70.54 | r | ----- | z | ----- | z | ----- | z | 68.01 | |||||
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | 61.05 | 64.35 | 75.02 | 69.55 | a | ----- | z | ----- | z | ----- | z | ----- | z | 67.49 | ||||
| 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 | 68.90 | a | 61.23 | 50.81 | 37.52 | 27.11 | 49.11 | |||||
| 1949 | 12.90 | 31.86 | 43.77 | 53.97 | 62.56 | 65.92 | 71.77 | 71.42 | 63.88 | 47.08 | 42.25 | 33.23 | 50.05 | |||||||||||||
| 1950 | 26.02 | 33.61 | 40.32 | 49.00 | 54.79 | 63.35 | 73.05 | 71.05 | 63.12 | 55.40 | 44.12 | e | 38.26 | 51.01 | ||||||||||||
| 1951 | 31.56 | 38.23 | 38.94 | 52.85 | 57.81 | 63.37 | 74.65 | 68.91 | i | 62.85 | 50.65 | 39.08 | 30.16 | 49.10 | ||||||||||||
| 1952 | 26.98 | 31.38 | 38.53 | 53.48 | 59.02 | 65.73 | 72.32 | 72.11 | 63.72 | 54.18 | 35.38 | 34.74 | 50.63 | |||||||||||||
| 1953 | 42.39 | 38.14 | 44.08 | 48.35 | 54.08 | 61.08 | 73.92 | 71.11 | 64.47 | 53.03 | 45.88 | 33.53 | 52.51 | |||||||||||||
| 1954 | 37.95 | 40.07 | 40.90 | 51.15 | 60.45 | 61.58 | 74.68 | 67.82 | 60.60 | 49.84 | 42.90 | 30.90 | 51.57 | |||||||||||||
| 1955 | 25.76 | 29.86 | 38.47 | 46.17 | 54.92 | 65.98 | 69.81 | 72.69 | 61.23 | 52.40 | 36.32 | 37.11 | 49.23 | |||||||||||||
| 1956 | 33.95 | 28.78 | 43.50 | 52.30 | 61.03 | 64.45 | 73.68 | 68.50 | 61.80 | 49.35 | 34.83 | 31.02 | 50.27 | |||||||||||||
| 1957 | 19.42 | 31.09 | 43.29 | 49.40 | 58.87 | 65.93 | 70.47 | 68.65 | 62.85 | 49.55 | 36.95 | 35.35 | 49.32 | |||||||||||||
| 1958 | 31.13 | 41.71 | 41.08 | 48.55 | 63.47 | 66.22 | 72.16 | 73.47 | 60.92 | 52.60 | 39.52 | 35.79 | 52.22 | |||||||||||||
| 1959 | 36.02 | 37.93 | 41.09 | i | 52.18 | 54.50 | 68.17 | 74.29 | 69.15 | 59.68 | 51.50 | 36.55 | 28.61 | 51.69 | ||||||||||||
| 1960 | 23.42 | 34.53 | 43.18 | a | 51.63 | 55.44 | 67.75 | 76.48 | 67.79 | 64.18 | 50.42 | 41.03 | 29.47 | 50.44 | ||||||||||||
| 1961 | 30.34 | 40.91 | 45.52 | 49.95 | 59.02 | 71.27 | 74.34 | 74.56 | 57.32 | 48.48 | 36.21 | a | 29.74 | 51.47 | ||||||||||||
| 1962 | 20.03 | 31.27 | 40.69 | 54.35 | 56.11 | 65.87 | 71.29 | 68.58 | 62.72 | 51.56 | 42.33 | 34.55 | 49.95 | |||||||||||||
| 1963 | 24.44 | 42.50 | 45.48 | 48.12 | 60.89 | 64.40 | a | 69.82 | 70.77 | a | 66.48 | 55.68 | 41.82 | 28.13 | 51.54 | |||||||||||
| 1964 | 26.98 | 29.03 | 39.66 | 48.37 | 55.77 | 63.40 | 72.63 | 67.50 | 59.42 | 51.68 | 38.87 | 35.50 | 49.07 | |||||||||||||
| 1965 | 32.81 | 37.62 | 39.65 | 52.90 | 55.97 | 64.98 | 71.50 | 68.55 | 56.63 | 53.06 | 43.83 | 30.56 | 50.67 | |||||||||||||
| 1966 | 35.08 | 35.39 | 44.66 | 50.62 | 61.95 | 64.00 | 71.61 | 70.11 | 66.20 | 50.00 | 44.02 | 33.03 | 52.22 | |||||||||||||
| 1967 | 36.58 | 39.46 | 43.58 | 45.42 | 58.31 | 65.95 | 75.32 | 74.97 | 67.52 | 50.52 | 41.72 | 29.82 | 52.43 | |||||||||||||
| 1968 | 29.40 | 40.71 | 46.65 | 48.18 | 58.24 | 66.67 | 74.23 | 67.37 | 61.65 | 49.97 | 40.33 | 34.35 | 51.48 | |||||||||||||
| 1969 | 32.18 | 33.84 | 41.15 | 52.77 | 62.37 | 66.03 | 71.94 | 71.15 | 63.35 | 47.53 | 39.35 | 34.52 | 51.35 | |||||||||||||
| 1970 | 36.95 | 39.98 | 42.81 | 46.13 | 58.00 | 67.88 | 73.27 | 72.73 | 57.78 | 48.08 | 42.22 | 32.35 | 51.52 | |||||||||||||
| 1971 | 33.06 | 37.80 | 40.31 | 50.42 | 60.26 | 63.23 | 72.15 | 74.74 | 58.82 | 50.31 | 39.43 | 31.63 | 51.01 | |||||||||||||
| 1972 | 29.05 | 34.26 | 46.03 | 49.73 | 60.74 | 67.28 | 71.00 | 72.55 | 58.48 | 52.35 | 40.65 | 23.68 | 50.48 | |||||||||||||
| 1973 | 30.33 | a | 38.14 | 44.56 | 50.23 | 61.45 | 66.67 | 73.89 | 72.21 | 61.95 | 51.85 | 41.33 | 37.00 | a | 52.47 | |||||||||||
| 1974 | 29.60 | 38.96 | 43.98 | 51.28 | 56.10 | 69.97 | 71.39 | 71.16 | 64.15 | 51.34 | 41.70 | 32.15 | 51.81 | |||||||||||||
| 1975 | 26.82 | 35.84 | 41.68 | 44.92 | 56.42 | 63.87 | 76.06 | 67.97 | 63.65 | 53.08 | 39.45 | 32.87 | 50.22 | |||||||||||||
| 1976 | 32.35 | 35.91 | 39.29 | 49.30 | 61.63 | 63.42 | 73.55 | 67.42 | 63.55 | 50.79 | 39.78 | 28.44 | 50.45 | |||||||||||||
| 1977 | 19.47 | 33.52 | 41.56 | 55.28 | 54.24 | 70.68 | 71.08 | 72.52 | 62.23 | 51.77 | 40.15 | 37.10 | 50.80 | |||||||||||||
| 1978 | 35.77 | 38.75 | 47.82 | 50.58 | 57.13 | 64.45 | 72.16 | 69.79 | 61.33 | 52.73 | 35.77 | 27.53 | 51.15 | |||||||||||||
| 1979 | 15.06 | 34.00 | 45.27 | 50.48 | 60.40 | 67.62 | 73.40 | 71.52 | 67.30 | 54.63 | 35.23 | 34.18 | 50.76 | |||||||||||||
| 1980 | 31.65 | 40.24 | 43.74 | 55.12 | 59.24 | 64.35 | 74.27 | 68.71 | 62.85 | 51.85 | 39.17 | 32.90 | 52.01 | |||||||||||||
| 1981 | 34.00 | 37.48 | 45.37 | 52.33 | 58.56 | 65.17 | 71.31 | 74.44 | 64.93 | 50.00 | 43.82 | 35.34 | 52.73 | |||||||||||||
| 1982 | 27.71 | 32.59 | 43.81 | b | 49.17 | 59.18 | 65.88 | 70.94 | 72.87 | 61.35 | 51.56 | 36.05 | 30.97 | 50.17 | ||||||||||||
| 1983 | 33.29 | 41.57 | 46.71 | 48.10 | 58.29 | 65.05 | 66.74 | 71.80 | c | 61.88 | 52.56 | 43.85 | 25.84 | 51.31 | ||||||||||||
| 1984 | 23.05 | 31.24 | 43.71 | 48.82 | 56.98 | 63.65 | 73.60 | 72.94 | 58.87 | 47.00 | 39.72 | 22.79 | 48.53 | |||||||||||||
| 1985 | 20.21 | 27.07 | 37.69 | 53.48 | 60.16 | 67.78 | 76.94 | 67.27 | ----- | z | 47.31 | 27.97 | 11.35 | 45.20 | ||||||||||||
| 1986 | 25.76 | 39.48 | 48.48 | 50.43 | 58.84 | 70.93 | 68.84 | 74.82 | 58.55 | 51.76 | 42.50 | 28.27 | 51.56 | |||||||||||||
| 1987 | 28.19 | 38.29 | 45.97 | ----- | z | 63.81 | 68.90 | 70.19 | 69.74 | 64.67 | 53.42 | 42.02 | 33.18 | 52.58 | ||||||||||||
| 1988 | 24.97 | 36.12 | 44.42 | 53.18 | 59.06 | 70.48 | 74.13 | 70.60 | 61.03 | 58.42 | 41.93 | 27.34 | 51.81 | |||||||||||||
| 1989 | 21.81 | 19.96 | 43.19 | 53.77 | 56.81 | 67.48 | 74.02 | 69.29 | 63.27 | 50.55 | 38.98 | 29.94 | 49.09 | |||||||||||||
| 1990 | 34.71 | 34.21 | 46.26 | 56.50 | 57.39 | 66.82 | 73.58 | 72.05 | 69.17 | 51.66 | 40.88 | 19.95 | 51.93 | |||||||||||||
| 1991 | 23.69 | 39.09 | 44.61 | 50.25 | 55.53 | 63.43 | 74.40 | 74.19 | 66.35 | ----- | z | 39.25 | 33.00 | 51.26 | ||||||||||||
| 1992 | 33.90 | 42.81 | 50.26 | 56.42 | 65.02 | 70.07 | 71.35 | 74.60 | 64.85 | 56.45 | 36.75 | 31.02 | a | 54.46 | ||||||||||||
| 1993 | 26.87 | 30.09 | 42.37 | 50.42 | 64.65 | 63.58 | 65.74 | 68.10 | 63.90 | 54.13 | 34.48 | 35.79 | 50.01 | |||||||||||||
| 1994 | 34.24 | 35.68 | 50.81 | 55.57 | 62.82 | 67.57 | 76.37 | 75.63 | 67.25 | 53.58 | 34.82 | 30.82 | 53.76 | |||||||||||||
| 1995 | 37.24 | 43.30 | 46.50 | 51.65 | 59.77 | 64.65 | 72.26 | 69.98 | 66.35 | 51.56 | 45.42 | 34.61 | 53.61 | |||||||||||||
| 1996 | 35.60 | 37.66 | 47.00 | 52.72 | 57.81 | 66.90 | 76.21 | 73.03 | 62.17 | 54.11 | 43.38 | 38.34 | 53.74 | |||||||||||||
| 1997 | 34.48 | 39.48 | 48.00 | 50.68 | 63.48 | 66.72 | 72.18 | 73.95 | 66.67 | 52.39 | 43.33 | ----- | z | 55.58 | ||||||||||||
| 1998 | 39.45 | 41.11 | 46.29 | 51.07 | 57.61 | 63.60 | 77.97 | 75.19 | 69.20 | 53.32 | 44.93 | 32.06 | 54.32 | |||||||||||||
| 1999 | 37.77 | g | 38.14 | 45.42 | f | 50.58 | 57.71 | 65.72 | 71.98 | 72.90 | 62.58 | 53.47 | b | 43.81 | l | 33.00 | g | 59.14 | ||||||||
| 2000 | 35.59 | h | 42.62 | i | 45.20 | f | ----- | z | 60.53 | 67.75 | 74.19 | 73.15 | 63.02 | 53.69 | e | 36.21 | k | 32.33 | k | 65.39 | ||||||
| 2001 | 27.95 | j | 31.55 | h | 47.81 | j | 50.12 | i | 62.61 | 67.18 | e | 73.97 | 76.17 | b | 66.55 | h | 53.52 | i | 44.59 | n | 33.32 | l | 69.98 | |||
| 2002 | 34.03 | 35.80 | 43.23 | 53.05 | 59.56 | 68.47 | a | 76.71 | 70.03 | 65.35 | 51.56 | e | 40.58 | j | 37.79 | 54.14 | ||||||||||
| 2003 | 38.67 | h | 38.95 | f | 49.11 | i | 51.15 | 59.56 | 68.77 | 78.71 | 75.10 | 65.58 | 59.46 | g | 38.84 | n | 38.29 | l | 66.48 | |||||||
| 2004 | 29.40 | k | 37.45 | i | 50.17 | h | 54.04 | b | 59.13 | 67.77 | 76.16 | 73.58 | 62.98 | 55.20 | f | 39.56 | l | 36.47 | k | 65.61 | ||||||
| 2005 | 33.43 | j | 36.11 | i | 46.83 | h | 52.50 | f | 59.90 | 64.85 | 75.94 | 74.77 | a | 62.38 | 53.57 | i | 37.95 | k | 29.73 | k | 67.57 | |||||
| 2006 | 37.55 | j | 38.45 | i | 45.26 | h | 53.69 | f | 61.61 | 69.82 | 78.76 | 72.31 | 63.50 | 52.62 | f | 44.63 | k | 33.00 | n | 69.20 | ||||||
| 2007 | 31.39 | i | 40.08 | i | 48.64 | j | 52.33 | 62.87 | ----- | z | 80.03 | 73.37 | 63.83 | 53.80 | i | 41.06 | l | 37.31 | o | 66.49 | ||||||
| 2008 | 29.10 | j | 38.20 | i | 43.24 | j | 48.21 | b | 59.48 | 65.83 | a | 75.05 | 73.81 | 62.17 | 52.52 | g | 41.68 | m | 32.17 | k | 64.09 | |||||
| 2009 | 30.75 | k | 35.27 | 41.39 | 50.30 | b | 60.66 | 65.90 | 74.18 | 72.45 | 67.73 | 48.08 | 39.58 | 25.64 | f | 55.55 | ||||||||||
| 2010 | 35.56 | 37.79 | 44.52 | 47.98 | 53.61 | 65.38 | 72.45 | 70.18 | 63.62 | 56.06 | 38.95 | 32.32 | 51.54 | |||||||||||||
| 2011 | 29.89 | 35.66 | 43.76 | 45.75 | 55.18 | 62.53 | 71.36 | b | 74.89 | 67.53 | a | 53.71 | 39.07 | 29.63 | 50.75 | |||||||||||
| 2012 | 34.42 | 37.76 | 46.18 | a | 53.25 | 58.60 | 67.45 | 77.61 | 75.08 | a | 66.57 | b | 53.10 | 45.05 | 37.29 | 54.36 | ||||||||||
| 2013 | 18.65 | 38.33 | a | 47.29 | 57.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.76 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 29.59 | 36.16 | 43.78 | 50.88 | 59.07 | 66.08 | 73.34 | 71.66 | 63.19 | 51.79 | 39.86 | 31.54 | 51.36 | |||||||||||||
| S.D. | 6.39 | 4.43 | 2.99 | 2.79 | 2.91 | 2.40 | 2.60 | 2.41 | 2.96 | 2.43 | 3.49 | 4.83 | 1.43 | |||||||||||||
| SKEW | -0.54 | -1.02 | 0.01 | -0.08 | 0.20 | 0.14 | -0.03 | -0.19 | 0.00 | 0.10 | -0.72 | -1.59 | 0.39 | |||||||||||||
| MAX | 42.39 | 43.30 | 50.81 | 56.50 | 66.19 | 71.27 | 80.03 | 76.17 | 70.31 | 58.42 | 45.88 | 38.34 | 54.46 | |||||||||||||
| MIN | 12.90 | 19.96 | 37.69 | 44.92 | 53.61 | 61.08 | 65.74 | 67.27 | 56.63 | 47.00 | 27.97 | 11.35 | 48.53 | |||||||||||||
| NO YRS | 55 | 57 | 55 | 62 | 71 | 70 | 72 | 72 | 70 | 62 | 58 | 54 | 47 | |||||||||||||