| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.19 | e | 42.57 | 38.94 | 44.90 | |||
| 1920 | 49.06 | 43.03 | 37.90 | 44.93 | 57.65 | 63.40 | 75.03 | 78.45 | 61.67 | 47.77 | 37.47 | 32.80 | f | 54.22 | ||||||||||||
| 1921 | 39.14 | b | 44.75 | 45.16 | 47.70 | c | 56.74 | 65.63 | 77.45 | 76.71 | 65.97 | 60.48 | 39.10 | j | 40.71 | 56.40 | ||||||||||
| 1922 | 33.13 | 40.93 | 43.52 | 52.80 | 58.55 | 75.93 | 85.52 | 74.06 | 74.17 | 53.00 | 40.67 | 33.26 | 55.46 | |||||||||||||
| 1923 | 33.77 | 39.93 | 44.77 | 53.97 | 54.45 | ----- | z | 72.26 | 70.35 | 60.83 | 50.77 | 47.65 | d | 35.50 | c | 51.30 | ||||||||||
| 1924 | 34.39 | 42.34 | 38.74 | 52.57 | 64.26 | 71.13 | 72.94 | 65.16 | 57.80 | 52.61 | 37.10 | 32.90 | a | 51.83 | ||||||||||||
| 1925 | 37.32 | 37.86 | 44.77 | 47.77 | 54.75 | z | ----- | z | 82.44 | f | 78.17 | a | 67.11 | b | ----- | z | ----- | z | ----- | z | 52.17 | |||||
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 38.90 | 28.60 | a | 33.75 | ||
| 1927 | 26.83 | a | 25.89 | 30.40 | a | 37.90 | 44.20 | k | 56.20 | 70.00 | c | 65.84 | 49.07 | 45.77 | 34.97 | 31.13 | a | 43.09 | ||||||||
| 1928 | 32.48 | b | 33.57 | a | 34.43 | a | 34.41 | a | 53.07 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.59 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.61 | ----- | z | 55.94 | 52.53 | 39.32 | 56.60 | |||||
| 1930 | 25.74 | 36.32 | ----- | z | 44.20 | 46.68 | ----- | z | ----- | z | 70.29 | ----- | z | ----- | z | 51.50 | 38.23 | a | 44.71 | |||||||
| 1931 | 42.87 | 41.54 | 41.55 | 49.57 | 62.90 | a | 65.43 | 76.61 | 75.15 | e | 61.30 | 54.06 | 47.63 | 35.39 | c | 54.50 | ||||||||||
| 1932 | 32.71 | 34.52 | 39.52 | 42.77 | 50.10 | 61.77 | 67.65 | 69.94 | 68.37 | 59.23 | 43.00 | 27.61 | 49.76 | |||||||||||||
| 1933 | 28.26 | 31.14 | 35.39 | 46.47 | 43.00 | 56.73 | 72.13 | 72.48 | 58.70 | 59.06 | 48.90 | 35.92 | g | 50.21 | ||||||||||||
| 1934 | 39.45 | 41.54 | 49.74 | 54.33 | 54.90 | b | 58.63 | 69.94 | 72.23 | 65.17 | 55.48 | 41.93 | 37.87 | 53.43 | ||||||||||||
| 1935 | 38.25 | k | 37.93 | 33.97 | 43.00 | 53.77 | 62.37 | 71.03 | 72.39 | 69.50 | 49.97 | 42.23 | 38.74 | 52.26 | ||||||||||||
| 1936 | 34.32 | 32.45 | 40.10 | 49.90 | 54.48 | 58.50 | 68.80 | a | 72.48 | 63.97 | 61.77 | 48.83 | 32.48 | 51.51 | ||||||||||||
| 1937 | 21.81 | 27.36 | 33.81 | 37.87 | 53.87 | 57.83 | 72.23 | 68.55 | 64.24 | a | 48.61 | 40.53 | 36.13 | 46.90 | ||||||||||||
| 1938 | 35.29 | 29.11 | 31.16 | 41.63 | 48.13 | 59.31 | a | 70.94 | 69.42 | 65.63 | 48.61 | 37.17 | 38.32 | 47.89 | ||||||||||||
| 1939 | 35.55 | 30.07 | 41.84 | 49.72 | a | 52.23 | 57.73 | 71.32 | 74.96 | h | 64.93 | 53.77 | 47.07 | 35.48 | 49.07 | |||||||||||
| 1940 | 35.77 | 34.03 | 41.73 | a | 46.23 | 56.90 | 70.43 | 68.68 | 75.90 | a | 57.67 | c | 50.87 | 38.83 | 37.84 | 51.24 | ||||||||||
| 1941 | 34.71 | 37.39 | 45.42 | 45.38 | d | 49.84 | 55.13 | 71.94 | 64.97 | a | 55.77 | 49.52 | 44.87 | 32.74 | 48.97 | |||||||||||
| 1942 | 35.80 | a | 32.36 | 40.45 | 44.37 | 47.39 | 55.77 | 71.13 | 72.48 | 67.03 | 57.94 | 35.14 | w | ----- | z | 52.47 | ||||||||||
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.53 | a | 64.90 | a | 71.50 | n | ----- | z | ----- | z | ----- | z | 67.72 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.94 | 68.87 | ----- | z | ----- | z | ----- | z | ----- | z | 68.90 | |||
| 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 | 43.40 | a | 39.13 | 36.26 | 39.60 | |||
| 1947 | 36.06 | 42.43 | 43.55 | 48.47 | 58.97 | 55.40 | 63.90 | 66.23 | 58.43 | 50.45 | 37.20 | 34.81 | 49.66 | |||||||||||||
| 1948 | 40.74 | 34.11 | a | 33.48 | 36.13 | 47.13 | 60.00 | a | 63.48 | 67.52 | 58.20 | 56.39 | 36.73 | 25.74 | 46.64 | |||||||||||
| 1949 | 28.71 | 29.29 | 34.55 | 50.33 | 53.45 | 64.63 | 71.87 | 68.97 | a | 66.00 | 49.33 | a | 49.93 | 31.39 | 49.87 | |||||||||||
| 1950 | 23.19 | 35.21 | 35.84 | 42.77 | 53.23 | 56.70 | 71.06 | 72.87 | 64.20 | 48.90 | 41.80 | 39.52 | 48.77 | |||||||||||||
| 1951 | 30.32 | 33.96 | b | 37.61 | 51.00 | 52.65 | 64.27 | 73.00 | a | 70.42 | 69.70 | 47.45 | 38.66 | a | 31.94 | 50.08 | ||||||||||
| 1952 | 26.26 | 34.03 | 33.23 | 49.31 | a | 52.16 | 53.33 | 72.75 | c | 71.04 | e | 66.45 | h | 62.23 | e | 42.07 | 31.74 | 48.01 | ||||||||
| 1953 | 35.16 | 37.68 | 36.26 | 41.03 | 42.50 | a | 49.34 | a | 68.84 | 63.65 | 70.00 | a | 51.03 | a | 39.67 | 36.68 | 47.65 | |||||||||
| 1954 | 29.74 | 42.89 | 35.07 | a | 45.34 | a | 53.90 | 53.33 | c | 68.21 | b | 61.65 | 58.48 | a | 49.33 | a | 43.69 | a | 33.84 | 47.96 | ||||||
| 1955 | 32.00 | 31.61 | 33.68 | 32.87 | 48.32 | 57.90 | 62.03 | 72.81 | 56.81 | i | 51.26 | 35.90 | 32.35 | 44.61 | ||||||||||||
| 1956 | 29.16 | 29.86 | 34.94 | 45.46 | b | 51.26 | 55.44 | c | 71.71 | 66.77 | a | 63.59 | c | 46.06 | 47.80 | 40.94 | 48.58 | |||||||||
| 1957 | 27.84 | 36.82 | 34.10 | a | 42.57 | 50.81 | 60.67 | 65.90 | 64.00 | 64.83 | 43.42 | 39.50 | 35.90 | 47.20 | ||||||||||||
| 1958 | 34.29 | 33.61 | 32.52 | 39.00 | 56.97 | 57.10 | 70.68 | 72.39 | 60.63 | 56.58 | 41.63 | 41.71 | 49.76 | |||||||||||||
| 1959 | 33.48 | 33.07 | 39.10 | 48.20 | 45.45 | 61.07 | b | 75.94 | 70.97 | 57.03 | 52.71 | 48.53 | 39.03 | 50.38 | ||||||||||||
| 1960 | 29.26 | 31.38 | 39.77 | 40.20 | 45.58 | 63.33 | 74.87 | 67.16 | 66.50 | 52.35 | 35.87 | 38.19 | 48.71 | |||||||||||||
| 1961 | 40.48 | 32.86 | 32.06 | 43.37 | 46.39 | 64.50 | 72.87 | 73.65 | 57.87 | 49.58 | 40.53 | 33.16 | 48.94 | |||||||||||||
| 1962 | 37.61 | 34.36 | 32.48 | 47.57 | 43.81 | 59.93 | 70.03 | 67.58 | 65.63 | 52.13 | 40.70 | 41.39 | 49.44 | |||||||||||||
| 1963 | 39.52 | 41.25 | 36.13 | 34.17 | 51.16 | 54.23 | 63.87 | 67.77 | 64.97 | 48.77 | 36.90 | 41.32 | 48.34 | |||||||||||||
| 1964 | 31.42 | 39.41 | 34.35 | 40.77 | 46.97 | 53.47 | 66.39 | 66.29 | 62.37 | 57.32 | 39.60 | 31.97 | 47.53 | |||||||||||||
| 1965 | 34.81 | 39.25 | 41.19 | 42.30 | 47.35 | 57.33 | 67.55 | 64.39 | 59.60 | 57.58 | 37.27 | 31.84 | 48.37 | |||||||||||||
| 1966 | 31.71 | 31.86 | 37.58 | 48.73 | 55.58 | 55.47 | 63.39 | 70.29 | 61.76 | a | 53.58 | 39.77 | 33.35 | 48.59 | ||||||||||||
| 1967 | 33.48 | 39.89 | 31.94 | 33.33 | 51.87 | 58.73 | 72.26 | 76.35 | 68.80 | 48.81 | 44.33 | 31.23 | 49.25 | |||||||||||||
| 1968 | 33.29 | 39.45 | 39.48 | 42.70 | 48.00 | 59.60 | 72.87 | 60.68 | 62.23 | 48.29 | 37.27 | 26.65 | 47.54 | |||||||||||||
| 1969 | 26.74 | 27.18 | 38.71 | 41.00 | 54.55 | 58.53 | 69.19 | 69.90 | 63.43 | 42.71 | 47.07 | 34.81 | 47.82 | |||||||||||||
| 1970 | 31.00 | 40.36 | 37.26 | 35.97 | 51.71 | 60.73 | 70.87 | 72.77 | 57.93 | 49.77 | 37.37 | 29.81 | 47.96 | |||||||||||||
| 1971 | 33.45 | 36.21 | 31.42 | 39.47 | 48.71 | 52.43 | 68.61 | 71.16 | 56.63 | 46.90 | 38.33 | 27.48 | 45.90 | |||||||||||||
| 1972 | 31.03 | 33.79 | 39.58 | 37.70 | 52.45 | 60.57 | 70.29 | 68.84 | 56.23 | 52.32 | 35.80 | 28.29 | 47.24 | |||||||||||||
| 1973 | 29.58 | 34.86 | 34.58 | 45.37 | 55.39 | 59.80 | 71.84 | 70.35 | 61.77 | 50.16 | 30.93 | 31.90 | 48.04 | |||||||||||||
| 1974 | 29.97 | 32.50 | 35.03 | 37.97 | 46.97 | 61.37 | 65.06 | 69.29 | 71.77 | 57.13 | 41.03 | 33.48 | 48.46 | |||||||||||||
| 1975 | 35.35 | 30.54 | 32.71 | 35.50 | 49.97 | 56.27 | 68.17 | a | 63.45 | 68.83 | 43.42 | 33.97 | 39.13 | 46.44 | ||||||||||||
| 1976 | 38.94 | 34.41 | 36.16 | 39.23 | 52.65 | 54.53 | 65.84 | 58.84 | 63.37 | 57.03 | 49.67 | 44.77 | 49.62 | |||||||||||||
| 1977 | 40.35 | 40.25 | 32.32 | 47.17 | 40.74 | 64.60 | 67.84 | 71.74 | 56.33 | 51.55 | 35.67 | 33.39 | 48.50 | |||||||||||||
| 1978 | 32.52 | 34.25 | 43.23 | 37.70 | 45.23 | 55.83 | 67.58 | 63.65 | 52.83 | 61.33 | g | 38.97 | 30.68 | 45.68 | ||||||||||||
| 1979 | 31.16 | 29.00 | 40.61 | 38.90 | 51.77 | 60.52 | a | 67.61 | 65.35 | 64.77 | 53.00 | 37.90 | 38.58 | 48.27 | ||||||||||||
| 1980 | 33.58 | 35.69 | 34.16 | 43.10 | 47.52 | 50.60 | 68.39 | 68.50 | a | 63.30 | 56.35 | 43.30 | 41.42 | 48.83 | ||||||||||||
| 1981 | 41.55 | 39.50 | 39.23 | 44.40 | 49.45 | 59.00 | 70.42 | 76.74 | 64.80 | 48.39 | 38.67 | 33.00 | 50.43 | |||||||||||||
| 1982 | 30.13 | 33.82 | 33.77 | 36.47 | 50.68 | 55.83 | 64.39 | 67.32 | 55.80 | 47.39 | 36.27 | 33.52 | 45.45 | |||||||||||||
| 1983 | 35.00 | 32.00 | 33.97 | 35.67 | z | 46.39 | 53.20 | 56.03 | 66.16 | 60.50 | 53.16 | 33.80 | 30.61 | 45.53 | ||||||||||||
| 1984 | 39.06 | 36.17 | 38.74 | 37.23 | 47.06 | 54.20 | 69.32 | 68.61 | 59.70 | 43.06 | 31.93 | 30.03 | 46.26 | |||||||||||||
| 1985 | 41.19 | 34.61 | 35.48 | 48.73 | 48.90 | 60.80 | 73.19 | 65.42 | 52.80 | 48.71 | 31.77 | 42.03 | 48.64 | |||||||||||||
| 1986 | 36.35 | 34.89 | 42.26 | 42.63 | 49.52 | 63.03 | 63.84 | 74.13 | 52.27 | 52.84 | 39.63 | 37.68 | 49.09 | |||||||||||||
| 1987 | 33.61 | 35.11 | 35.77 | 50.70 | 52.39 | 63.63 | 63.52 | 70.87 | 69.10 | 64.32 | 40.21 | a | 29.61 | 50.74 | ||||||||||||
| 1988 | 32.74 | 42.86 | 39.90 | 44.27 | 46.97 | 57.37 | 71.42 | 73.00 | 65.93 | 63.84 | 34.80 | 35.94 | 50.75 | |||||||||||||
| 1989 | 34.19 | 28.71 | 34.26 | 46.93 | 47.00 | 59.40 | 65.65 | 63.77 | 62.13 | 49.39 | 44.17 | 44.90 | 48.38 | |||||||||||||
| 1990 | 34.06 | 31.82 | 41.55 | 49.90 | 47.48 | 56.73 | 70.19 | 67.87 | 66.50 | 52.71 | 38.67 | 28.71 | 48.85 | |||||||||||||
| 1991 | 38.13 | 42.57 | 32.45 | 38.17 | 44.94 | 52.80 | 70.55 | 70.26 | 70.67 | 57.52 | 39.77 | 36.97 | 49.56 | |||||||||||||
| 1992 | 37.19 | 38.28 | 43.48 | 45.40 | 61.58 | 64.30 | 65.81 | 74.10 | 62.83 | 54.74 | 38.83 | 30.16 | 51.39 | |||||||||||||
| 1993 | 27.97 | 31.39 | 39.71 | 37.07 | 50.74 | 52.97 | 58.94 | 65.06 | 65.50 | 54.42 | 41.70 | 35.52 | 46.75 | |||||||||||||
| 1994 | 39.81 | 31.46 | 43.97 | 43.50 | 51.35 | 58.97 | 74.90 | 71.16 | 64.53 | 49.48 | 29.70 | 31.16 | 49.17 | |||||||||||||
| 1995 | 31.19 | 43.46 | 34.97 | 39.77 | 48.65 | 54.03 | 64.45 | 65.32 | 65.60 | 51.65 | 42.67 | 34.77 | 48.04 | |||||||||||||
| 1996 | 32.81 | 35.55 | 38.93 | a | 41.57 | 45.65 | 57.97 | 72.52 | 71.81 | 59.73 | 50.16 | 40.60 | 31.42 | 48.23 | ||||||||||||
| 1997 | 33.13 | 35.43 | 38.32 | 39.40 | 54.61 | 54.90 | 66.45 | 68.45 | 60.73 | 47.55 | 38.53 | 36.10 | 47.80 | |||||||||||||
| 1998 | 32.00 | 28.39 | 36.39 | 41.67 | 41.77 | 56.27 | 71.00 | 72.58 | 67.27 | 48.55 | 33.87 | 31.03 | 46.73 | |||||||||||||
| 1999 | 34.32 | 28.36 | 32.26 | 39.83 | 47.00 | 54.67 | 65.29 | 65.68 | 65.97 | 57.42 | 40.00 | 38.29 | 47.42 | |||||||||||||
| 2000 | 31.65 | 34.55 | 36.42 | 45.07 | 47.03 | 61.57 | 66.03 | 71.71 | 62.03 | 50.19 | 37.60 | 38.13 | 48.50 | |||||||||||||
| 2001 | 36.16 | 33.00 | 41.19 | 38.93 | 58.87 | 58.37 | 69.03 | 73.19 | 66.17 | 55.68 | 38.47 | 30.42 | 49.96 | |||||||||||||
| 2002 | 30.68 | 38.00 | 35.71 | 44.80 | 49.00 | 61.20 | 74.13 | 69.77 | 66.20 | 55.61 | 44.87 | 34.77 | 50.40 | |||||||||||||
| 2003 | 40.37 | a | 36.43 | 36.19 | 35.27 | 50.71 | c | 63.10 | 74.06 | 70.58 | 68.07 | 56.68 | 33.41 | a | 32.13 | 49.75 | ||||||||||
| 2004 | 33.60 | a | 32.93 | 45.65 | 46.40 | 48.13 | 59.13 | 71.39 | 68.87 | 59.63 | 50.06 | 41.47 | 38.77 | a | 49.67 | |||||||||||
| 2005 | 35.81 | 40.71 | 41.10 | 39.43 | 48.27 | a | 52.43 | 72.57 | a | 73.35 | 60.50 | 50.48 | 40.87 | 36.00 | 49.29 | |||||||||||
| 2006 | 30.77 | 36.00 | 28.61 | 40.50 | 51.90 | 61.33 | 72.81 | 69.03 | 64.50 | 51.23 | a | 34.80 | 34.35 | 47.99 | ||||||||||||
| 2007 | 35.87 | a | 35.18 | 43.33 | a | 43.10 | 53.00 | 60.11 | b | 73.68 | 71.06 | 63.67 | 44.19 | 45.41 | a | 29.48 | 49.84 | |||||||||
| 2008 | 27.81 | 34.55 | 34.13 | a | 37.73 | 50.72 | f | 58.62 | d | 70.97 | 70.74 | 67.70 | 54.42 | 44.03 | a | 33.40 | a | 48.55 | ||||||||
| 2009 | 39.81 | 34.46 | 34.71 | 41.03 | a | 51.87 | 58.17 | 72.39 | 69.16 | 67.13 | 46.90 | 36.33 | 31.84 | 48.65 | ||||||||||||
| 2010 | 31.68 | 31.50 | 36.48 | 36.03 | a | 41.16 | 53.00 | 69.13 | 66.00 | 59.23 | 50.81 | 33.97 | 28.42 | 44.78 | ||||||||||||
| 2011 | 35.90 | 30.79 | 28.58 | 33.73 | 42.00 | a | 52.10 | 62.13 | 68.94 | 66.47 | 50.06 | 33.93 | 39.55 | 45.35 | ||||||||||||
| 2012 | 35.74 | 33.03 | 31.29 | 40.17 | 47.65 | 52.23 | 67.19 | 72.65 | 69.40 | 51.90 | 37.60 | 27.87 | 47.23 | |||||||||||||
| 2013 | 34.45 | 34.89 | 39.13 | 45.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.00 | z | 36.16 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 33.85 | 35.20 | 37.32 | 42.81 | 50.50 | 58.61 | 69.57 | 69.64 | 63.01 | 51.97 | 40.08 | 34.56 | 48.83 | |||||||||||||
| S.D. | 4.55 | 4.34 | 4.37 | 5.20 | 4.83 | 4.67 | 4.29 | 4.03 | 4.83 | 4.70 | 4.86 | 4.31 | 1.90 | |||||||||||||
| SKEW | 0.18 | 0.21 | 0.37 | 0.16 | 0.42 | 0.85 | -0.03 | -0.07 | -0.41 | 0.38 | 0.45 | 0.21 | 0.89 | |||||||||||||
| MAX | 49.06 | 44.75 | 49.74 | 54.33 | 64.26 | 75.93 | 85.52 | 78.61 | 74.17 | 64.32 | 52.53 | 44.90 | 55.46 | |||||||||||||
| MIN | 21.81 | 25.89 | 28.58 | 32.87 | 40.74 | 49.34 | 56.03 | 58.84 | 49.07 | 42.71 | 29.70 | 25.74 | 44.78 | |||||||||||||
| NO YRS | 87 | 88 | 87 | 86 | 84 | 83 | 86 | 88 | 83 | 86 | 87 | 86 | 71 | |||||||||||||