YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1913 | 37.84 | 44.50 | 47.58 | 57.90 | 63.00 | 69.50 | 75.39 | 77.71 | 69.43 | 56.00 | 51.77 | 46.90 | 58.13 | |||||||||||||
1914 | 47.61 | 48.46 | 55.74 | 60.93 | 68.81 | 69.30 | 77.84 | 75.97 | 64.67 | 66.35 | 51.67 | 42.94 | 60.86 | |||||||||||||
1915 | 46.13 | 50.46 | 59.61 | 62.57 | 64.19 | 68.90 | 73.48 | 78.84 | 67.83 | 60.61 | 47.20 | 45.06 | 60.41 | |||||||||||||
1916 | 35.00 | 49.72 | 50.97 | 57.90 | 60.81 | 68.80 | 70.35 | 76.00 | 70.80 | 60.42 | 49.07 | 40.71 | 57.55 | |||||||||||||
1917 | 41.23 | 43.96 | 46.87 | 52.67 | 60.26 | 65.54 | d | 77.39 | 79.97 | 68.60 | 60.97 | 56.93 | 48.48 | 58.57 | ||||||||||||
1918 | 46.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.84 | k | |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | 42.77 | 46.03 | 52.23 | 53.00 | a | 62.16 | 68.90 | 76.52 | 78.19 | 67.70 | 55.29 | 53.20 | 46.26 | 58.52 | ||||||||||||
1921 | 45.74 | 48.00 | 51.52 | 56.50 | 64.16 | 69.57 | 73.45 | 75.06 | 66.70 | 62.03 | 50.70 | 43.32 | 58.90 | |||||||||||||
1922 | 39.74 | 45.46 | 48.58 | 54.87 | 65.84 | 74.03 | 77.55 | 74.52 | 71.77 | 59.19 | 49.87 | 41.23 | 58.55 | |||||||||||||
1923 | 42.97 | 44.75 | 51.94 | 60.77 | 62.97 | 70.40 | 77.45 | 80.71 | 72.00 | 64.03 | 54.47 | 47.00 | 60.79 | |||||||||||||
1924 | 45.39 | 52.03 | 52.26 | 59.10 | 69.10 | 71.43 | 76.42 | 74.48 | 71.00 | 60.55 | 49.20 | 41.06 | 60.17 | |||||||||||||
1925 | 45.48 | 50.89 | 52.19 | 58.57 | 68.39 | 70.60 | 79.10 | 74.13 | 68.63 | 60.13 | 50.80 | 47.52 | 60.54 | |||||||||||||
1926 | 45.58 | 52.43 | 59.61 | 66.20 | 65.06 | 74.53 | 80.13 | 75.48 | 67.87 | 62.10 | 55.27 | 44.68 | 62.41 | |||||||||||||
1927 | 43.71 | 50.14 | 50.48 | 57.70 | 59.55 | 71.77 | 77.42 | 78.16 | 66.30 | 61.06 | 48.90 | 40.68 | 58.82 | |||||||||||||
1928 | 46.58 | 49.24 | 55.55 | 56.77 | 70.19 | 68.30 | 77.29 | 77.37 | a | 69.07 | 57.71 | 50.63 | 43.90 | 60.22 | ||||||||||||
1929 | 36.55 | 41.11 | 52.23 | 55.53 | 64.48 | 68.40 | 77.45 | 78.84 | 73.20 | 65.26 | 49.23 | 46.39 | 59.06 | |||||||||||||
1930 | 34.74 | 49.71 | 55.35 | 61.83 | 63.74 | 68.50 | 75.94 | 78.90 | 68.37 | 60.16 | 47.93 | 45.74 | 59.24 | |||||||||||||
1931 | 50.16 | 50.64 | 54.23 | 61.90 | 70.39 | 69.97 | 78.42 | 78.00 | 67.10 | 60.16 | 46.17 | 43.94 | 60.92 | |||||||||||||
1932 | 41.52 | 45.17 | 51.13 | 58.43 | 63.65 | 73.73 | 72.29 | 73.81 | 72.93 | 61.65 | 52.77 | 41.26 | 59.03 | |||||||||||||
1933 | 42.19 | 42.32 | 52.39 | 58.23 | 59.10 | 68.87 | 75.23 | 77.48 | 65.37 | 59.42 | 48.37 | 47.58 | 58.05 | |||||||||||||
1934 | 48.39 | 54.61 | 59.97 | 64.97 | 67.61 | 72.17 | 74.48 | 77.94 | 67.67 | 62.74 | 52.20 | 45.65 | 62.37 | |||||||||||||
1935 | 44.77 | 50.46 | 48.19 | 58.97 | 66.23 | 70.47 | 74.81 | 74.93 | d | 73.63 | 56.94 | 46.17 | 46.65 | 59.35 | ||||||||||||
1936 | 45.65 | 38.07 | 50.16 | 61.34 | a | 66.45 | 70.40 | 75.55 | 78.39 | 69.50 | 61.65 | 49.83 | 45.10 | 59.34 | ||||||||||||
1937 | 33.16 | 45.54 | 55.68 | 54.50 | 65.94 | 71.60 | 76.16 | 73.94 | 69.60 | 63.06 | 49.47 | 45.84 | 58.71 | |||||||||||||
1938 | 44.58 | 50.14 | 51.77 | 60.63 | 66.71 | 73.47 | 81.58 | 76.06 | 75.33 | 61.94 | 47.57 | 45.23 | 61.25 | |||||||||||||
1939 | 46.03 | 43.15 | a | 53.06 | 61.87 | 67.16 | 67.37 | 76.74 | 80.48 | 71.07 | 59.74 | 55.70 | 50.00 | 61.03 | ||||||||||||
1940 | 48.65 | 49.07 | 56.94 | 60.73 | 70.06 | 77.03 | 77.58 | 77.77 | 71.63 | 61.39 | 46.97 | 48.26 | 62.17 | |||||||||||||
1941 | 49.84 | 54.18 | 62.13 | 63.50 | 65.42 | 70.50 | 82.35 | 75.58 | 65.40 | 59.00 | 52.53 | 45.39 | 62.15 | |||||||||||||
1942 | 45.58 | 47.57 | 54.48 | 61.50 | 63.65 | 68.80 | 77.81 | 79.13 | 72.83 | 62.03 | 48.17 | 45.65 | 60.60 | |||||||||||||
1943 | 38.52 | 51.68 | 52.23 | 62.33 | 63.23 | 68.60 | 76.97 | 75.16 | 74.27 | 59.32 | 51.60 | 43.94 | 59.82 | |||||||||||||
1944 | 46.90 | 46.31 | 52.68 | 59.50 | 66.32 | 70.77 | 78.03 | 75.42 | 74.00 | 63.52 | 49.50 | 44.61 | 60.63 | |||||||||||||
1945 | 46.06 | 47.14 | 51.35 | 55.17 | 66.48 | 70.27 | 80.26 | 77.61 | 67.60 | 60.16 | 47.63 | 44.52 | 59.52 | |||||||||||||
1946 | 44.45 | 47.14 | 52.16 | 57.70 | 68.74 | 67.97 | 75.68 | 75.97 | 68.67 | 54.90 | 46.60 | 43.03 | 58.58 | |||||||||||||
1947 | 39.61 | 50.54 | 57.65 | 62.40 | 70.00 | 69.53 | 75.10 | 75.77 | 71.37 | 57.65 | 46.87 | 46.87 | 60.28 | |||||||||||||
1948 | 41.97 | 44.62 | 50.68 | 53.50 | 61.65 | 71.73 | 72.00 | 67.13 | 64.83 | 56.60 | a | 47.50 | 40.35 | 56.05 | ||||||||||||
1949 | 35.94 | 44.71 | 52.26 | 59.23 | 67.61 | 69.77 | 73.06 | 71.94 | 68.47 | 53.42 | 57.17 | 44.35 | 58.16 | |||||||||||||
1950 | 31.00 | 47.18 | 48.45 | 55.97 | 62.77 | 70.13 | 75.65 | 74.97 | 67.77 | 54.65 | 48.87 | 49.90 | 57.27 | |||||||||||||
1951 | 42.94 | 47.36 | 46.81 | 62.70 | 65.39 | 74.00 | 78.90 | 74.65 | 69.80 | 57.03 | 51.10 | 41.32 | 59.33 | |||||||||||||
1952 | 42.55 | 46.41 | 48.93 | a | 60.53 | 65.39 | 66.47 | 77.55 | 75.03 | 71.47 | 63.13 | 48.70 | 48.03 | 59.52 | ||||||||||||
1953 | 49.94 | 47.46 | 50.81 | 55.60 | 62.52 | 63.37 | 73.65 | 71.77 | 67.33 | 58.68 | 53.70 | 47.68 | 58.54 | |||||||||||||
1954 | 41.61 | 49.68 | 50.68 | 54.60 | 64.03 | 63.83 | 68.29 | 66.87 | 64.60 | 58.16 | 55.07 | 47.29 | 57.06 | |||||||||||||
1955 | 43.48 | 43.54 | 44.94 | 53.37 | 59.45 | 66.97 | 68.32 | 69.81 | 66.17 | a | 57.26 | 47.23 | 45.61 | 55.51 | ||||||||||||
1956 | 45.42 | 41.97 | 48.94 | 60.17 | 68.52 | 64.17 | 75.74 | 73.52 | 67.07 | 56.81 | 50.27 | 47.97 | 58.38 | |||||||||||||
1957 | 40.48 | 46.79 | 51.68 | 58.90 | 65.90 | 68.23 | 70.90 | 71.23 | 72.87 | 58.26 | 51.23 | 50.03 | 58.88 | |||||||||||||
1958 | 50.84 | 55.14 | 52.61 | 58.70 | 70.16 | 73.00 | 81.52 | 78.35 | 68.10 | 62.16 | 50.30 | 51.90 | 62.73 | |||||||||||||
1959 | 46.68 | 47.75 | 52.06 | 59.93 | 63.97 | 69.30 | 78.06 | 73.48 | 64.97 | 59.23 | 51.97 | 46.90 | 59.53 | |||||||||||||
1960 | 45.19 | 49.14 | 53.29 | 59.60 | 60.84 | 70.47 | 79.39 | 71.39 | 68.83 | 61.65 | 52.03 | 46.74 | 59.88 | |||||||||||||
1961 | 53.16 | 51.46 | 54.65 | 55.60 | 65.23 | 75.73 | 78.48 | 81.97 | 70.70 | 61.23 | 50.43 | 45.10 | 61.98 | |||||||||||||
1962 | 45.81 | 50.64 | 51.23 | 59.93 | 58.00 | 69.33 | 74.39 | 73.84 | 71.00 | 60.94 | 53.67 | 48.39 | 59.76 | |||||||||||||
1963 | 40.35 | 57.00 | 51.55 | 55.50 | 67.61 | 67.23 | 71.65 | 74.42 | 74.00 | 61.61 | 50.63 | 47.77 | 59.94 | |||||||||||||
1964 | 46.32 | 48.66 | 50.81 | 54.53 | 63.00 | 66.90 | 73.71 | 72.06 | 66.73 | 63.10 | 46.10 | 40.29 | 57.68 | |||||||||||||
1965 | 44.13 | 47.79 | 55.74 | 59.67 | 62.58 | 71.83 | 79.94 | 76.48 | 67.27 | 64.45 | 53.67 | 44.26 | 60.65 | |||||||||||||
1966 | 45.00 | 48.71 | 54.10 | 59.40 | 67.06 | 68.47 | 72.77 | 76.84 | 71.90 | 60.13 | 52.27 | 48.45 | 60.43 | |||||||||||||
1967 | 46.61 | 49.14 | 49.45 | 54.20 | 65.16 | 75.73 | 79.06 | 86.74 | 77.17 | 61.10 | 51.97 | 44.48 | 61.74 | |||||||||||||
1968 | 45.35 | 55.45 | 54.90 | 56.90 | 65.77 | 69.37 | 79.77 | 73.77 | 68.13 | 58.52 | 51.50 | 41.00 | 60.04 | |||||||||||||
1969 | 36.74 | 46.54 | 54.55 | 57.10 | 70.03 | 74.17 | 76.58 | 74.19 | 69.40 | 58.84 | 50.90 | 48.26 | 59.77 | |||||||||||||
1970 | 43.81 | 53.11 | 54.26 | 54.43 | 65.55 | 75.03 | 78.81 | 77.23 | 66.90 | 58.65 | 51.10 | 42.52 | 60.12 | |||||||||||||
1971 | 44.19 | 47.46 | 49.48 | 59.30 | 67.32 | 65.27 | 79.35 | 82.19 | 69.13 | 58.10 | 49.73 | 41.19 | 59.39 | |||||||||||||
1972 | 40.19 | 48.03 | 54.13 | 55.67 | 69.90 | 69.70 | 78.16 | 79.84 | 67.40 | 59.00 | 50.90 | 40.42 | 59.45 | |||||||||||||
1973 | 44.70 | a | 52.78 | a | 52.39 | 60.20 | 68.87 | 70.00 | 78.13 | 74.13 | 73.47 | 58.97 | 46.30 | 46.86 | b | 60.57 | ||||||||||
1974 | 42.40 | a | 47.57 | 52.16 | 57.10 | 60.58 | 72.59 | a | 74.77 | 78.19 | 78.73 | 63.39 | 51.21 | a | 47.87 | 60.55 | ||||||||||
1975 | 43.40 | a | 46.57 | 50.19 | 54.80 | 65.68 | 68.70 | 77.17 | a | 71.71 | 74.07 | 57.00 | 49.77 | 45.35 | 58.70 | |||||||||||
1976 | 46.14 | b | 45.90 | 49.77 | 58.97 | 66.90 | 67.93 | 75.55 | 70.48 | 70.47 | 60.48 | 51.83 | 46.81 | 59.27 | ||||||||||||
1977 | 41.97 | a | 54.50 | 50.55 | 63.17 | 61.43 | a | 73.53 | 75.42 | 82.58 | 66.23 | 59.32 | 47.53 | 44.74 | 60.08 | |||||||||||
1978 | 47.00 | a | 50.61 | 55.39 | 57.80 | 64.32 | 75.33 | 77.19 | 75.97 | 63.77 | 62.23 | 46.97 | 40.52 | 59.76 | ||||||||||||
1979 | 40.16 | 46.30 | a | 58.16 | 58.80 | 68.39 | 74.00 | 80.03 | 76.45 | 72.87 | 62.00 | 50.40 | 49.50 | a | 61.42 | |||||||||||
1980 | 39.71 | 49.83 | 51.39 | 64.33 | 65.65 | 66.87 | 77.52 | 74.97 | 70.57 | 63.58 | 51.00 | 48.20 | a | 60.30 | ||||||||||||
1981 | 51.19 | 49.43 | 57.34 | b | 58.83 | 64.03 | 68.48 | a | 75.06 | 83.61 | 72.93 | 56.71 | 52.70 | 44.97 | a | 61.28 | ||||||||||
1982 | 42.50 | e | 47.24 | c | 52.36 | c | 57.58 | f | 65.72 | f | 75.19 | i | 73.68 | i | 77.00 | g | 71.18 | h | 60.67 | g | 48.03 | a | 44.00 | e | 46.83 | g |
1983 | 49.00 | c | 53.20 | c | 56.13 | a | 60.92 | f | 69.35 | k | 68.19 | d | 71.27 | i | 76.24 | j | 68.04 | e | 59.23 | a | 51.53 | 38.65 | 55.50 | d | ||
1984 | 47.58 | 50.00 | 55.84 | 56.76 | a | 62.87 | a | 68.41 | a | 77.93 | a | 79.31 | b | 70.03 | 56.16 | 49.55 | a | 40.87 | a | 59.61 | ||||||
1985 | 41.32 | 44.75 | 51.32 | 59.60 | 65.71 | 71.66 | a | 85.03 | 77.90 | 66.40 | 57.75 | c | 38.17 | a | 39.00 | a | 58.22 | |||||||||
1986 | 52.74 | 50.93 | a | 58.26 | 57.18 | b | 64.65 | 74.63 | 71.07 | a | ----- | z | 68.20 | 64.52 | 49.37 | 46.87 | 59.85 | a | ||||||||
1987 | 45.84 | 53.04 | 55.55 | 64.00 | 67.29 | 75.03 | 75.16 | 80.00 | 76.00 | a | 68.52 | 54.93 | 44.70 | a | 63.34 | |||||||||||
1988 | 46.45 | 51.72 | 54.61 | 59.47 | 65.23 | a | 70.07 | 77.55 | 78.10 | a | 73.50 | 60.69 | b | 50.97 | 46.90 | 61.27 | ||||||||||
1989 | 45.97 | a | 43.71 | 53.33 | a | 64.61 | b | 64.69 | b | 72.56 | e | 72.72 | f | 75.04 | e | 76.26 | g | 61.21 | b | 51.90 | 47.40 | a | 58.04 | b | ||
1990 | 47.13 | 46.85 | b | 57.14 | b | 60.72 | e | 63.25 | c | 69.42 | d | 80.71 | j | 77.38 | e | 73.52 | g | 58.35 | h | 50.76 | e | 39.04 | h | 59.08 | d | |
1991 | 45.25 | c | 57.58 | d | 52.30 | d | 57.38 | i | 60.48 | f | 66.67 | f | 79.00 | i | 79.64 | i | 75.78 | g | 62.75 | g | 51.67 | c | 48.67 | d | 51.09 | g |
1992 | 51.07 | a | 54.77 | g | 59.75 | g | 63.05 | i | 70.46 | e | 73.95 | h | 74.92 | g | 78.23 | i | 70.33 | i | 60.45 | i | 49.68 | e | 43.62 | g | 57.07 | i |
1993 | 42.00 | e | 50.57 | g | 56.87 | h | 56.57 | g | 68.65 | h | 67.75 | j | 68.17 | h | 75.00 | f | 75.60 | e | 62.71 | 47.60 | 46.81 | 54.94 | g | |||
1994 | 49.32 | 45.86 | 56.71 | 59.10 | 66.90 | 68.20 | 79.16 | 77.29 | 74.47 | 60.10 | 46.30 | 46.10 | 60.79 | |||||||||||||
1995 | 51.90 | 50.93 | 56.03 | a | 59.30 | c | 69.07 | a | 70.79 | a | 76.76 | b | 73.32 | c | 73.88 | d | 60.86 | c | 56.50 | b | 49.03 | 62.36 | ||||
1996 | 44.97 | 51.48 | 56.74 | 60.55 | a | 60.52 | 70.47 | 81.03 | 79.03 | 68.40 | 59.71 | 49.40 | 44.68 | 60.58 | ||||||||||||
1997 | 47.35 | 49.52 | a | 52.77 | 58.73 | 69.42 | 68.63 | 75.30 | a | 79.77 | 73.14 | a | 58.35 | 56.50 | 49.00 | a | 61.54 | |||||||||
1998 | 48.35 | 52.54 | 55.23 | 58.70 | 61.10 | a | 68.48 | a | 77.77 | 79.03 | a | 76.20 | 61.35 | 51.40 | 45.29 | 61.29 | ||||||||||
1999 | 46.97 | 48.54 | 51.55 | 57.73 | 60.74 | 65.10 | 73.23 | 74.19 | 72.50 | 61.13 | 55.40 | 46.29 | 59.45 | |||||||||||||
2000 | 45.06 | 50.34 | 51.87 | 60.80 | 62.84 | 70.33 | 73.84 | 75.48 | 69.27 | 60.81 | 48.67 | 47.23 | a | 59.71 | ||||||||||||
2001 | 48.74 | 48.14 | 53.45 | 56.20 | 65.94 | 66.37 | 73.71 | 75.32 | 71.00 | 59.29 | 54.33 | 46.39 | 59.91 | |||||||||||||
2002 | 45.87 | 48.89 | 44.71 | 55.43 | 61.68 | 71.70 | 76.16 | 76.39 | 72.73 | 59.03 | 55.80 | 48.84 | 59.77 | |||||||||||||
2003 | 51.26 | 46.89 | 52.55 | 56.20 | 63.10 | 73.30 | 81.03 | 79.58 | ----- | z | 62.45 | 47.97 | a | 47.35 | 60.15 | a | ||||||||||
2004 | 45.16 | 50.69 | 56.23 | 63.03 | 64.68 | 72.40 | 79.74 | 77.97 | 66.87 | 61.03 | 51.27 | 47.06 | 61.34 | |||||||||||||
2005 | 48.32 | 52.25 | 57.97 | 57.53 | 65.58 | 66.73 | 76.35 | 79.45 | 69.41 | a | ----- | z | 47.90 | 44.65 | 60.56 | a | ||||||||||
2006 | 48.57 | a | 47.46 | b | 51.84 | 59.53 | 65.48 | 71.97 | a | 78.32 | 77.39 | 73.27 | 59.40 | a | 50.60 | 47.39 | 60.93 | |||||||||
2007 | 44.68 | 49.63 | a | 53.84 | 57.73 | 65.68 | 69.37 | 76.43 | a | 74.10 | 68.60 | 57.35 | 50.33 | ----- | z | 60.70 | a | |||||||||
2008 | 43.35 | 48.03 | 48.80 | a | 53.53 | ----- | z | 66.63 | 75.35 | 75.29 | 69.87 | 59.00 | 54.59 | a | 41.57 | a | 57.82 | a | ||||||||
2009 | 45.26 | 49.46 | 48.90 | 57.20 | 65.03 | 72.13 | 81.48 | 74.42 | 71.53 | 57.94 | 51.93 | 42.68 | 59.83 | |||||||||||||
2010 | 51.94 | 53.14 | 55.42 | 56.50 | 61.84 | 64.63 | 75.13 | 75.61 | 67.27 | 60.13 | 48.70 | 47.58 | 59.82 | |||||||||||||
2011 | 46.77 | 45.89 | 51.55 | 52.67 | 59.65 | 66.17 | 71.26 | 75.61 | 72.40 | 58.19 | 49.63 | 43.97 | 57.81 | |||||||||||||
2012 | 45.23 | 49.79 | 49.52 | 56.93 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.18 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.67 | 48.73 | 52.87 | 58.57 | 65.05 | 70.01 | 76.53 | 76.29 | 70.06 | 60.11 | 50.54 | 45.42 | 59.86 | |||||||||||||
S.D. | 4.25 | 3.46 | 3.28 | 3.03 | 3.01 | 2.92 | 3.04 | 3.27 | 3.19 | 2.60 | 2.99 | 2.82 | 1.46 | |||||||||||||
SKEW | -0.68 | -0.07 | 0.16 | 0.14 | -0.11 | 0.11 | -0.26 | -0.03 | 0.31 | 0.19 | -0.32 | -0.43 | -0.24 | |||||||||||||
MAX | 53.16 | 57.58 | 62.13 | 66.20 | 70.46 | 77.03 | 85.03 | 86.74 | 78.73 | 68.52 | 57.17 | 51.90 | 63.34 | |||||||||||||
MIN | 31.00 | 38.07 | 44.71 | 52.67 | 58.00 | 63.37 | 68.29 | 66.87 | 63.77 | 53.42 | 38.17 | 38.65 | 55.51 | |||||||||||||
YRS | 99 | 96 | 96 | 92 | 92 | 93 | 90 | 91 | 91 | 92 | 97 | 94 | 85 |