YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1893 | 71.68 | 72.14 | 73.26 | 82.27 | 91.16 | 105.63 | 104.48 | 101.72 | f | 97.00 | 90.03 | 74.67 | 70.20 | f | 86.23 | b | ||||||||||
1894 | 62.84 | 64.14 | 75.60 | a | 87.10 | 94.23 | 97.97 | ----- | z | 101.10 | 96.97 | 91.52 | b | ----- | z | ----- | z | 85.72 | c | |||||||
1895 | ----- | z | 73.04 | 81.65 | 87.40 | ----- | z | 101.47 | ----- | z | 104.21 | c | 97.47 | 91.19 | ----- | z | ----- | z | 90.92 | e | ||||||
1896 | ----- | z | ----- | z | ----- | z | 84.30 | 90.45 | 102.10 | 100.30 | a | 103.81 | 99.32 | e | 96.07 | a | ----- | z | ----- | z | 96.62 | e | ||||
1897 | ----- | z | ----- | z | 68.68 | f | 86.67 | 96.53 | a | 101.20 | 103.29 | 101.05 | j | 92.17 | 87.26 | 81.87 | 69.35 | 89.79 | d | |||||||
1898 | 60.90 | 75.29 | 77.87 | 88.60 | 91.71 | 98.37 | 101.74 | ----- | z | ----- | z | 89.97 | b | 76.53 | 66.03 | a | 82.70 | b | ||||||||
1899 | 65.32 | 66.96 | ----- | z | ----- | z | ----- | z | ----- | z | 102.96 | d | 100.16 | 101.37 | 85.52 | 80.40 | 72.93 | c | 84.45 | d | ||||||
1900 | 73.50 | e | 71.07 | 80.94 | 81.27 | 92.16 | 100.00 | 103.81 | 100.13 | 93.27 | 85.32 | 74.93 | 68.65 | 85.42 | ||||||||||||
1901 | 65.23 | 65.82 | 72.90 | 81.24 | a | 88.94 | 98.37 | 105.71 | 102.48 | 97.17 | 86.58 | 76.70 | 66.40 | a | 83.96 | |||||||||||
1902 | 66.53 | a | 69.75 | 70.94 | 86.65 | m | 91.48 | 103.07 | 102.74 | 101.90 | 96.24 | a | 89.65 | 76.10 | 67.43 | a | 85.08 | a | ||||||||
1903 | 67.90 | 67.00 | 74.35 | 81.60 | 88.71 | 99.37 | 104.90 | 105.10 | 95.55 | a | 88.55 | 80.47 | 70.77 | 85.36 | ||||||||||||
1904 | 66.71 | c | 76.79 | 78.42 | 86.80 | 94.07 | a | 101.60 | t | 102.25 | o | 101.13 | 96.33 | 89.16 | 82.62 | f | 68.26 | 84.19 | c | |||||||
1905 | 68.87 | a | 67.04 | 73.10 | 78.97 | 88.52 | 103.30 | 108.10 | 106.47 | a | 100.87 | 89.26 | 76.10 | 64.74 | 85.44 | |||||||||||
1906 | 66.81 | 71.50 | 76.32 | 81.90 | 92.19 | 104.13 | 107.16 | 99.87 | 99.60 | 91.00 | 76.60 | ----- | z | 87.92 | a | |||||||||||
1907 | ----- | z | ----- | z | ----- | z | 87.57 | w | 90.48 | 99.97 | 105.16 | 99.84 | 97.63 | 83.55 | 72.63 | 67.90 | 89.65 | d | ||||||||
1908 | 66.39 | 66.69 | 75.71 | 83.33 | 87.35 | 99.53 | 101.68 | 99.29 | 96.38 | a | 81.45 | 74.33 | 64.16 | 83.03 | ||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 103.30 | u | 98.10 | 94.27 | 88.58 | 75.83 | a | 58.90 | 83.13 | g | ||||
1910 | 64.10 | 69.64 | 81.97 | 86.90 | 96.03 | 102.10 | 104.42 | 103.35 | 101.07 | 88.16 | 74.43 | 67.90 | 86.67 | |||||||||||||
1911 | 67.74 | 64.54 | 78.10 | 83.83 | 91.94 | 100.80 | 98.81 | 103.23 | 97.93 | 83.52 | 71.90 | 60.87 | 83.60 | |||||||||||||
1912 | 68.65 | 72.72 | 70.30 | a | 76.77 | 90.03 | 102.80 | 99.97 | 99.87 | 95.23 | 82.03 | 75.60 | 62.84 | 83.07 | ||||||||||||
1913 | 61.93 | a | 65.04 | 72.10 | 83.40 | 92.06 | 98.50 | 101.94 | 101.42 | 96.33 | 86.87 | 73.40 | 62.26 | 82.94 | ||||||||||||
1914 | 67.58 | 69.11 | a | 77.65 | 84.90 | 92.77 | 100.23 | 102.55 | 103.32 | 98.93 | 84.06 | 76.93 | 60.06 | 84.84 | ||||||||||||
1915 | 61.61 | 65.82 | 72.87 | a | 82.57 | 87.06 | 101.30 | 102.68 | 104.87 | 96.50 | 92.26 | 76.81 | c | 65.19 | 84.13 | |||||||||||
1916 | 60.61 | 72.93 | 79.00 | 84.60 | 91.65 | 103.13 | 103.35 | 101.10 | 95.17 | 82.71 | 75.53 | 63.39 | 84.43 | |||||||||||||
1917 | 61.23 | 67.50 | 72.39 | 81.63 | 85.74 | 103.60 | 103.74 | 101.48 | 97.66 | a | 91.84 | 80.53 | 73.81 | 85.10 | ||||||||||||
1918 | 64.00 | 70.64 | 75.16 | 83.20 | 89.00 | 107.09 | s | 103.61 | 99.39 | 99.53 | 89.23 | 72.07 | 61.58 | 82.49 | a | |||||||||||
1919 | 65.23 | 62.93 | 71.60 | a | 85.77 | 92.71 | 104.83 | 101.00 | 103.13 | 96.00 | 82.06 | 72.33 | 68.29 | 83.82 | ||||||||||||
1920 | 65.39 | 68.59 | 72.23 | 79.67 | 93.48 | 101.33 | 107.23 | 101.87 | 96.77 | 82.77 | 74.57 | 66.16 | 84.17 | |||||||||||||
1921 | 66.77 | 74.96 | 80.79 | b | 84.54 | d | 85.84 | f | 100.00 | 101.97 | 99.97 | 99.03 | 91.81 | 79.72 | a | 69.13 | 86.25 | a | ||||||||
1922 | 62.90 | a | 67.39 | 70.00 | 78.97 | 93.65 | 103.77 | 104.83 | a | 104.13 | 98.43 | g | 88.90 | 71.73 | 67.55 | 83.07 | a | |||||||||
1923 | 70.29 | 68.36 | 73.39 | 81.97 | 94.87 | 100.10 | 102.84 | 100.03 | 95.33 | 85.42 | 71.83 | 62.06 | 83.87 | |||||||||||||
1924 | 64.84 | 74.72 | 70.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 105.00 | y | 61.86 | b | 67.90 | h | |||
1925 | 63.84 | 73.12 | d | 81.94 | 85.63 | 94.70 | a | 99.50 | h | 107.23 | 102.23 | 97.10 | 82.33 | a | 74.76 | a | 65.52 | 84.40 | a | |||||||
1926 | 60.90 | 70.82 | 72.35 | 78.83 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 68.10 | b | 70.20 | g | ||||
1927 | 72.20 | a | 71.36 | 77.10 | 83.60 | 95.97 | 103.47 | 108.90 | 104.06 | 97.80 | 86.59 | n | 80.34 | a | 63.23 | 87.09 | a | |||||||||
1928 | 69.57 | a | 69.79 | 79.77 | 85.63 | 96.10 | 103.97 | 107.90 | 103.90 | 102.17 | ----- | z | 73.79 | b | 59.55 | 86.56 | a | |||||||||
1929 | 56.17 | a | 61.54 | 70.10 | 75.30 | t | 93.00 | a | 92.93 | 104.87 | a | 104.14 | c | 98.55 | a | ----- | z | ----- | z | 73.29 | c | 83.84 | c | |||
1930 | 63.45 | 79.77 | f | 76.90 | 89.20 | 88.19 | 103.80 | 104.33 | a | 99.39 | m | 97.21 | p | 89.35 | 86.86 | w | 76.26 | h | 87.89 | e | ||||||
1931 | 73.15 | e | 71.79 | d | 80.40 | a | 87.83 | 97.87 | 103.23 | 109.32 | 102.80 | a | 100.83 | 90.81 | 77.65 | m | 69.48 | j | 91.80 | b | ||||||
1932 | 66.69 | o | 69.03 | 78.46 | g | 87.37 | 94.80 | a | 107.74 | g | 106.39 | c | 107.20 | a | 103.57 | 87.47 | a | 83.93 | p | 63.43 | j | 93.69 | e | |||
1933 | 67.68 | 67.07 | 80.61 | c | 83.90 | 86.83 | a | 96.47 | k | 109.62 | b | 108.16 | 103.00 | ----- | z | 83.43 | b | 73.77 | 86.41 | b | ||||||
1934 | 73.00 | 76.50 | 87.07 | a | 91.37 | 100.94 | 99.97 | 107.71 | ----- | z | 101.17 | 93.47 | n | 76.97 | 69.61 | 88.43 | b | |||||||||
1935 | 65.81 | 70.00 | a | 70.35 | 83.47 | 87.39 | 104.77 | 105.29 | 100.00 | 97.93 | 87.19 | 62.60 | y | ----- | z | 87.22 | b | |||||||||
1936 | 70.85 | k | ----- | z | 81.50 | g | 91.39 | g | 98.83 | a | 105.97 | 106.61 | 103.90 | 98.24 | a | ----- | z | ----- | z | 65.40 | u | 102.71 | g | |||
1937 | 58.30 | h | 68.86 | 74.00 | 85.67 | 97.32 | 102.53 | 106.84 | 106.55 | 101.50 | 90.76 | b | 77.94 | n | 71.00 | c | 90.50 | b | ||||||||
1938 | 69.81 | 70.25 | 72.68 | 86.30 | 93.16 | 102.77 | 104.35 | 103.84 | 102.27 | 88.47 | l | 72.96 | b | 69.77 | 86.20 | a | ||||||||||
1939 | 65.87 | a | 60.58 | b | 79.21 | b | 88.30 | 95.90 | 103.53 | 106.68 | 103.58 | e | 95.70 | 87.81 | 80.13 | o | 74.30 | a | 87.40 | a | ||||||
1940 | 70.00 | 69.93 | 80.06 | 85.07 | 98.13 | 104.97 | 107.39 | 104.19 | 99.03 | 87.87 | 73.56 | n | 68.23 | 88.62 | a | |||||||||||
1941 | 66.55 | 70.48 | a | 73.23 | 77.50 | 93.52 | 101.47 | 105.90 | 103.06 | 98.37 | 83.74 | 77.75 | n | 66.68 | 85.50 | a | ||||||||||
1942 | 68.03 | 67.89 | 75.97 | 84.25 | n | ----- | z | ----- | z | 109.42 | 103.77 | 101.07 | 87.94 | 82.35 | j | 71.65 | 85.72 | d | ||||||||
1943 | 67.19 | 76.25 | 79.19 | 90.90 | 96.81 | 101.63 | c | 107.58 | 100.71 | 101.50 | 88.81 | 80.38 | d | 66.81 | 88.15 | |||||||||||
1944 | 66.35 | 66.41 | 72.58 | 80.54 | b | 92.35 | 100.33 | 107.06 | 107.58 | 99.73 | 92.19 | 71.60 | 69.23 | 85.50 | ||||||||||||
1945 | 66.68 | 70.86 | 71.84 | 84.63 | 93.39 | 100.87 | 107.74 | 104.10 | a | 100.70 | 90.60 | a | 78.17 | 65.56 | m | 88.14 | a | |||||||||
1946 | 64.74 | 72.75 | 80.68 | 92.07 | 92.97 | 105.47 | 105.87 | 102.77 | 98.27 | 81.97 | 71.17 | 70.45 | 86.60 | |||||||||||||
1947 | 65.10 | 77.75 | 80.35 | 85.40 | 96.81 | 100.73 | 108.26 | 102.42 | 102.47 | 90.48 | 72.10 | 66.61 | 87.37 | |||||||||||||
1948 | 73.19 | e | 71.00 | a | 74.37 | a | 86.70 | 96.38 | e | 97.64 | s | 104.88 | e | 104.39 | 97.87 | 90.32 | 73.50 | 65.81 | 85.31 | a | ||||||
1949 | 54.97 | 67.46 | 74.77 | a | 86.79 | a | 92.90 | a | 99.48 | i | 99.36 | t | 103.87 | 101.03 | 84.45 | 83.93 | 66.50 | a | 81.67 | b | ||||||
1950 | 68.03 | a | 73.11 | 77.13 | 87.43 | 91.03 | 100.70 | 100.39 | 102.68 | ----- | z | 96.84 | 81.30 | 74.68 | 86.67 | a | ||||||||||
1951 | 64.97 | 67.75 | 74.16 | 81.13 | 91.32 | 99.72 | a | 105.69 | b | 103.56 | f | 98.09 | s | 89.29 | 72.48 | a | 63.94 | 81.05 | b | |||||||
1952 | 63.39 | 67.41 | 65.72 | f | 80.70 | 94.87 | a | 101.56 | c | 103.83 | a | 103.32 | 101.13 | 95.86 | b | 74.11 | u | 63.06 | 87.51 | b | ||||||
1953 | 69.93 | c | 69.32 | 75.87 | a | 82.40 | 86.63 | a | 100.22 | l | 103.00 | e | 104.85 | e | 102.80 | e | 88.41 | b | 78.12 | e | 65.52 | 84.26 | a | |||
1954 | 66.11 | d | 77.59 | a | 72.63 | a | 88.12 | e | 93.89 | c | 100.23 | 103.19 | 100.93 | c | 102.12 | d | 94.38 | e | 80.18 | s | 71.24 | f | 89.92 | b | ||
1955 | 59.73 | e | 65.50 | 76.29 | 81.92 | e | 90.85 | e | 100.88 | f | 102.27 | e | 98.27 | e | 104.56 | l | 95.76 | f | 74.33 | i | 70.21 | g | 82.12 | e | ||
1956 | 70.26 | 62.54 | e | 77.71 | g | 83.33 | f | 96.58 | g | 105.33 | f | 104.54 | g | 100.89 | m | 101.80 | j | 91.39 | h | 76.59 | h | 70.42 | e | 67.74 | i | |
1957 | 63.83 | h | 75.50 | d | 75.93 | d | 83.76 | e | 96.00 | w | 102.46 | f | 104.70 | h | 103.77 | i | 100.08 | f | 85.71 | g | 69.83 | l | 68.83 | a | 76.00 | h |
1958 | 68.63 | l | 70.26 | i | 67.19 | j | 80.25 | f | 100.23 | i | 106.69 | n | 107.65 | e | 103.88 | g | 96.05 | i | 86.60 | f | 78.60 | j | 73.92 | g | 107.65 | k |
1959 | 69.22 | h | 69.24 | k | 77.96 | g | 89.73 | h | 92.08 | g | 105.28 | e | 107.05 | k | 100.12 | e | 100.40 | e | 87.36 | f | 74.62 | q | 64.85 | e | 92.66 | h |
1960 | 58.84 | f | 63.80 | i | 79.69 | e | 86.56 | e | 94.87 | h | 105.70 | g | 106.95 | k | 103.37 | d | 103.16 | e | 90.13 | p | 76.50 | j | 66.48 | f | 93.20 | h |
1961 | 70.40 | f | 72.83 | d | 75.74 | d | 84.23 | h | ----- | z | ----- | z | 105.58 | e | 102.52 | j | 96.62 | f | 87.27 | e | 72.32 | k | 63.16 | l | 85.36 | h |
1962 | 63.50 | e | 68.65 | e | 69.56 | f | 90.11 | l | ----- | z | ----- | z | ----- | z | 108.95 | j | 98.06 | m | 91.15 | e | 77.48 | g | 72.24 | f | 74.44 | i |
1963 | 65.03 | 77.18 | 76.84 | 82.27 | 98.11 | d | 100.65 | g | 107.82 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.54 | f | ||||
1964 | 61.26 | 65.72 | 69.45 | ----- | z | 93.10 | 97.80 | 105.39 | h | 99.96 | h | 95.26 | g | 93.08 | f | 71.62 | i | 69.81 | d | 76.19 | f | |||||
1965 | 66.52 | d | 66.29 | 70.08 | g | 79.13 | g | 87.05 | j | 98.73 | d | 104.24 | b | 105.00 | j | 101.31 | d | 97.03 | 76.30 | 65.92 | e | 84.54 | d | |||
1966 | 62.87 | 63.04 | 78.61 | 86.07 | 96.77 | 103.77 | 106.00 | 103.23 | 95.43 | 87.61 | 79.35 | d | 67.87 | 85.88 | ||||||||||||
1967 | 67.97 | 73.54 | ----- | z | ----- | z | 91.29 | 98.30 | 103.71 | 102.27 | t | 98.43 | 90.12 | f | 80.32 | b | 61.77 | 84.42 | d | |||||||
1968 | 61.58 | 65.29 | e | 73.16 | ----- | z | 88.71 | 104.93 | 102.22 | d | 96.65 | 98.13 | ----- | z | 82.10 | i | 66.58 | 84.14 | c | |||||||
1969 | 68.29 | 70.61 | 71.93 | c | 87.20 | 96.61 | 98.40 | 103.03 | 106.65 | 100.90 | a | 85.04 | d | 73.73 | d | 67.58 | 85.83 | |||||||||
1970 | 67.19 | 74.14 | 71.52 | b | 78.64 | b | 94.39 | 101.97 | a | 106.27 | a | 104.80 | a | 93.97 | 82.83 | a | 75.63 | c | 65.63 | a | 84.75 | |||||
1971 | 67.97 | 69.50 | 78.94 | 82.10 | 88.32 | 100.83 | 105.89 | c | 100.42 | 97.77 | 80.77 | 73.27 | 61.77 | 83.96 | ||||||||||||
1972 | 67.29 | 74.76 | 85.52 | 85.20 | 92.94 | 100.57 | 106.26 | 101.90 | a | 98.43 | 80.39 | 68.77 | 63.00 | 85.42 | ||||||||||||
1973 | 62.58 | 67.32 | 65.52 | 79.41 | a | 95.10 | 102.90 | 104.90 | 105.06 | 99.73 | 90.74 | 74.07 | 69.32 | 84.72 | ||||||||||||
1974 | 65.10 | 70.67 | a | 76.13 | 84.63 | 94.55 | 106.90 | 102.48 | 102.35 | 98.73 | 86.74 | 74.40 | 62.65 | 85.44 | ||||||||||||
1975 | 66.58 | 68.54 | 71.52 | 76.33 | 91.35 | 101.03 | 104.39 | 105.35 | 98.53 | 88.00 | 76.10 | 67.60 | a | 84.61 | ||||||||||||
1976 | 69.19 | 71.66 | 74.76 | f | 83.79 | k | 94.20 | k | 102.55 | h | 103.75 | k | 102.38 | e | 93.48 | a | 82.71 | 76.20 | 68.61 | 80.61 | e | |||||
1977 | 63.97 | 74.85 | b | 71.74 | 85.50 | 87.37 | a | 104.17 | 104.97 | 103.71 | 97.60 | 91.34 | b | 78.17 | 70.66 | b | 86.17 | |||||||||
1978 | 64.62 | b | 66.50 | 74.77 | i | 82.74 | g | 93.26 | ----- | z | 107.17 | y | 105.18 | c | 99.00 | b | ----- | z | 74.88 | d | 67.71 | q | 83.91 | f | ||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | 89.22 | h | 101.67 | f | 104.45 | b | 99.48 | b | 101.43 | ----- | z | ----- | z | ----- | z | 101.79 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 65.94 | 69.78 | 75.61 | 84.12 | 92.77 | 101.70 | 104.85 | 102.70 | 98.60 | 87.98 | 75.91 | 66.85 | 84.97 | |||||||||||||
S.D. | 3.67 | 3.96 | 4.11 | 3.44 | 3.36 | 2.52 | 2.43 | 2.37 | 2.62 | 3.98 | 3.34 | 3.75 | 1.28 | |||||||||||||
SKEW | -0.29 | 0.02 | 0.33 | -0.11 | -0.06 | -0.46 | -0.14 | -0.07 | -0.17 | 0.09 | 0.44 | 0.01 | 0.47 | |||||||||||||
MAX | 73.50 | 77.75 | 87.07 | 92.07 | 100.94 | 106.90 | 109.62 | 108.16 | 103.57 | 97.03 | 83.93 | 74.68 | 88.15 | |||||||||||||
MIN | 54.97 | 60.58 | 65.52 | 76.33 | 85.74 | 92.93 | 98.81 | 96.65 | 92.17 | 80.39 | 68.77 | 58.90 | 82.94 | |||||||||||||
YRS | 73 | 77 | 70 | 67 | 70 | 63 | 72 | 70 | 72 | 66 | 56 | 67 | 29 |