YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 102.33 | 75.55 | 64.77 | 55.48 | 74.53 | h | ||||
1900 | 58.35 | 63.32 | 81.97 | 72.90 | 90.94 | 100.40 | 105.90 | 102.91 | h | 92.80 | 76.84 | 63.33 | 54.95 | j | 80.68 | b | ||||||||||
1901 | 54.00 | 57.14 | 68.87 | 80.07 | a | 89.16 | 96.23 | 104.23 | 101.29 | 98.50 | ----- | z | ----- | z | ----- | z | 83.28 | c | ||||||||
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.55 | 57.55 | k | |
1908 | 54.77 | 57.03 | 70.03 | 77.73 | 79.71 | 92.50 | 97.39 | 93.87 | 86.67 | 70.84 | 60.40 | 48.81 | 74.15 | |||||||||||||
1909 | 55.58 | 54.68 | 62.35 | 74.57 | 83.48 | 96.77 | 95.52 | 92.26 | 87.03 | 78.23 | 62.50 | ----- | z | 76.63 | a | |||||||||||
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | 68.13 | 76.93 | 86.74 | 95.17 | 98.55 | 98.23 | 91.50 | 77.87 | 63.40 | ----- | z | 84.06 | c | |||||||||
1912 | 55.80 | a | 63.00 | 71.13 | h | 70.67 | 84.84 | 96.48 | a | 95.19 | 95.62 | b | 88.79 | b | 74.21 | b | 64.40 | 49.00 | 76.18 | a | ||||||
1913 | 48.77 | 55.36 | 66.03 | 79.82 | b | 88.90 | a | 94.57 | 99.27 | a | 95.93 | a | 87.10 | 77.77 | 63.62 | a | 51.06 | 75.68 | ||||||||
1914 | 55.39 | c | 58.59 | a | 72.89 | d | 78.40 | 88.58 | 96.03 | 97.61 | 96.42 | 88.37 | 77.23 | 67.20 | 50.77 | 77.29 | ||||||||||
1915 | 51.39 | 58.57 | 67.84 | 76.00 | 80.23 | 94.03 | 94.73 | p | 95.35 | 84.33 | 77.97 | 60.87 | 52.48 | 72.64 | a | |||||||||||
1916 | 51.03 | 63.72 | 70.74 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.43 | 51.00 | f | 61.73 | h | ||||
1917 | 45.73 | a | 57.32 | 62.83 | a | 71.55 | a | 76.70 | a | 93.70 | 95.74 | 89.29 | ----- | z | ----- | z | ----- | z | ----- | z | 74.11 | d | ||||
1918 | ----- | z | 62.94 | l | 66.90 | 73.63 | 79.42 | 95.83 | 91.32 | 88.77 | 87.20 | e | ----- | z | ----- | z | ----- | z | 83.30 | e | ||||||
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.74 | h | ----- | z |
1920 | 56.59 | b | 60.28 | 67.00 | 72.57 | 85.89 | c | 93.60 | 98.10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.29 | e | |||||
1921 | ----- | z | ----- | z | ----- | z | ----- | z | 83.74 | 93.93 | a | 96.35 | 88.13 | 88.70 | 79.27 | a | 65.50 | 55.00 | 81.33 | d | ||||||
1922 | 51.06 | 58.04 | a | 65.57 | a | 71.23 | 84.90 | 97.40 | 98.71 | 94.45 | ----- | z | 79.71 | 59.79 | b | ----- | z | 76.09 | b | |||||||
1923 | 59.45 | 56.43 | 67.45 | 74.43 | ----- | z | ----- | z | 99.68 | 91.68 | ----- | z | ----- | z | ----- | z | 53.64 | c | 71.82 | e | ||||||
1924 | 51.55 | 64.10 | 60.93 | b | 73.97 | 86.13 | 96.63 | 92.35 | 95.71 | 84.13 | 72.71 | 60.11 | b | 44.87 | 73.60 | |||||||||||
1925 | 45.23 | a | 60.46 | 67.77 | a | 76.26 | g | 84.73 | e | 85.90 | 90.47 | a | 84.17 | a | 80.53 | 65.48 | 53.83 | 51.55 | 70.01 | a | ||||||
1926 | 52.10 | a | 61.11 | 67.81 | 73.31 | a | 81.00 | 93.63 | 95.65 | 93.00 | 86.30 | 71.97 | a | 60.93 | 51.90 | 74.06 | ||||||||||
1927 | 60.81 | 63.54 | 74.39 | 83.70 | 94.91 | h | 99.17 | 105.19 | 96.83 | g | 90.76 | a | 82.30 | a | 67.50 | 50.32 | 77.77 | b | ||||||||
1928 | 57.19 | 61.38 | e | 76.15 | r | 81.63 | 92.38 | e | 100.39 | l | 101.81 | e | 99.92 | e | ----- | z | 68.19 | d | 52.84 | e | 51.74 | l | 76.92 | d | ||
1929 | 51.27 | a | 56.93 | 68.05 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.97 | a | 68.67 | 73.03 | a | 66.77 | g | ||
1930 | 60.39 | c | 68.52 | a | 72.27 | a | 83.63 | c | 80.97 | 102.14 | a | 98.91 | i | 97.10 | k | 94.87 | 80.48 | 65.80 | 48.16 | 75.72 | b | |||||
1931 | 49.33 | a | 57.43 | 69.73 | a | 79.60 | 84.93 | a | 91.52 | c | 93.43 | j | 91.22 | h | 93.96 | e | 74.79 | l | 53.66 | a | 42.12 | g | 72.52 | d | ||
1932 | 41.06 | 52.52 | b | 65.69 | b | 75.68 | h | 78.94 | 89.21 | b | 94.91 | h | 91.95 | i | 85.20 | e | 68.77 | a | 56.04 | g | 39.95 | i | 68.77 | e | ||
1933 | 40.19 | d | 47.36 | f | 65.40 | f | 71.04 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.93 | ----- | z | 51.56 | j | |
1934 | 46.31 | b | ----- | z | ----- | z | ----- | z | 78.55 | 91.89 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.25 | i | |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.13 | 93.48 | 94.90 | 80.67 | a | 62.17 | 56.32 | 80.61 | f | |||||
1957 | 52.10 | 64.57 | 68.35 | 73.27 | 78.61 | 95.37 | 97.94 | 93.39 | 91.23 | 73.74 | 57.37 | 56.90 | 75.24 | |||||||||||||
1958 | 55.16 | 61.82 | 59.87 | a | 72.80 | 88.06 | 97.00 | 99.35 | 97.23 | 88.50 | 80.32 | 63.47 | 59.81 | 76.95 | ||||||||||||
1959 | 56.23 | 58.64 | 71.87 | 82.00 | 84.81 | 99.30 | 103.81 | 93.13 | ----- | z | 79.50 | m | 63.03 | 52.26 | 76.51 | b | ||||||||||
1960 | 47.06 | 56.10 | 71.77 | 79.33 | 87.16 | 99.30 | 102.19 | 94.50 | q | 75.64 | e | 66.00 | 61.70 | t | 45.44 | m | 76.06 | c | ||||||||
1961 | 48.15 | e | 57.62 | d | 62.65 | 72.90 | i | 81.43 | c | 95.24 | a | 98.77 | a | 95.54 | c | 87.68 | b | 79.84 | f | 62.85 | j | 48.50 | c | 75.06 | c | |
1962 | 53.42 | 59.58 | d | 64.17 | b | 83.77 | 85.28 | b | 95.83 | a | 100.90 | 99.38 | e | 93.50 | b | 81.14 | c | 68.53 | 55.80 | f | 80.50 | a | ||||
1963 | 50.62 | b | 67.72 | c | 68.42 | 75.37 | c | 91.35 | 92.61 | b | 102.58 | 94.79 | b | 90.57 | b | 82.59 | b | 64.57 | 54.41 | b | 77.97 | |||||
1964 | 52.93 | a | 58.00 | b | 64.58 | 73.50 | 84.55 | b | 93.93 | 100.87 | a | 95.52 | b | 89.54 | b | 84.29 | c | 63.30 | t | 55.94 | 77.60 | a | ||||
1965 | 56.77 | a | 60.25 | 64.87 | a | 71.39 | b | 81.13 | a | 89.67 | 96.38 | g | 97.24 | b | 86.83 | ----- | z | ----- | z | 52.23 | a | 73.38 | c | |||
1966 | 51.23 | 52.46 | 71.79 | b | 80.59 | a | 89.52 | 96.86 | b | 97.07 | a | 99.52 | f | 92.07 | c | 77.97 | 65.92 | e | 53.03 | a | 75.32 | a | ||||
1967 | 54.03 | a | 63.38 | d | 71.94 | 71.07 | a | 85.68 | 92.00 | d | 99.93 | a | 100.00 | b | 88.56 | e | 80.61 | 67.85 | c | 47.32 | 76.86 | |||||
1968 | 51.20 | a | 64.55 | 71.10 | 73.82 | b | 87.00 | 98.10 | 99.66 | b | 93.89 | c | 94.79 | b | 81.65 | e | 67.33 | 50.46 | c | 77.80 | ||||||
1969 | 56.57 | a | 55.68 | 65.13 | a | 79.41 | a | 89.60 | f | 95.38 | a | 101.23 | 98.87 | a | 89.63 | 74.63 | d | 62.13 | o | 60.92 | r | 79.61 | c | |||
1970 | 56.54 | g | 64.86 | 66.29 | 72.59 | a | 88.26 | 96.07 | 98.13 | 96.33 | a | 89.76 | a | 76.55 | b | 67.00 | a | 54.00 | 79.08 | a | ||||||
1971 | 55.42 | 62.00 | 71.03 | a | 77.37 | 82.77 | 94.83 | a | 102.29 | 94.83 | a | 90.37 | 74.93 | a | 61.63 | 50.30 | a | 76.48 | ||||||||
1972 | 55.48 | 65.29 | a | 78.77 | 79.33 | 87.29 | 93.40 | 101.16 | 96.28 | b | 88.87 | 72.06 | 57.03 | 49.45 | 77.04 | |||||||||||
1973 | 46.74 | 57.21 | 59.13 | 72.77 | 86.29 | 94.00 | 100.16 | 96.97 | 91.03 | a | 80.48 | 64.23 | 56.26 | 75.44 | ||||||||||||
1974 | 50.48 | 59.50 | 71.35 | 76.77 | 90.68 | 102.77 | 98.03 | 99.94 | 93.43 | 78.90 | 61.37 | 51.16 | 77.87 | |||||||||||||
1975 | 53.29 | ----- | z | 64.26 | 69.33 | 84.65 | 95.77 | 100.06 | 99.03 | 93.60 | 80.87 | 64.37 | 53.65 | 78.08 | a | |||||||||||
1976 | 56.61 | 62.69 | 67.06 | 77.10 | 88.87 | 96.73 | 98.74 | 97.80 | a | 88.43 | 75.76 | b | 65.63 | 55.06 | 77.54 | |||||||||||
1977 | 51.32 | 64.82 | 66.84 | 80.00 | 80.26 | 96.33 | 98.90 | 97.84 | 92.17 | 81.45 | 66.30 | 59.48 | 77.98 | |||||||||||||
1978 | 54.45 | 57.36 | 68.48 | 74.43 | 84.42 | 97.90 | 101.03 | 97.68 | 89.70 | 81.94 | 60.83 | a | 46.58 | 76.23 | ||||||||||||
1979 | 46.61 | 54.11 | 64.77 | a | 76.30 | 84.26 | 94.53 | 99.87 | 94.32 | 95.03 | 81.03 | 60.33 | 53.90 | 75.42 | ||||||||||||
1980 | 53.71 | 61.55 | 63.65 | 76.10 | 81.45 | b | 96.43 | 100.35 | 98.27 | a | 92.70 | 79.68 | c | 65.14 | b | 60.70 | a | 77.48 | ||||||||
1981 | 59.77 | 63.54 | 66.10 | a | 82.30 | 85.16 | 99.83 | 100.74 | 98.69 | b | 90.40 | 74.40 | a | 65.50 | 55.87 | 78.53 | ||||||||||
1982 | 52.06 | 58.15 | a | 65.00 | a | 75.63 | 83.97 | 95.93 | a | 98.81 | 94.23 | a | 89.40 | 73.40 | a | 59.47 | 51.53 | a | 74.80 | |||||||
1983 | 54.52 | 60.30 | a | 64.03 | 70.77 | 86.55 | 96.03 | a | 97.58 | 95.11 | c | 93.97 | a | 80.31 | b | 65.39 | b | 57.52 | b | 76.84 | ||||||
1984 | 55.90 | 62.21 | 69.84 | 71.66 | a | 93.24 | b | 96.82 | b | 97.17 | b | 96.60 | a | 93.93 | b | 74.30 | a | 64.54 | d | 53.07 | a | 77.44 | ||||
1985 | 52.24 | b | 57.08 | b | 66.66 | b | 82.46 | b | 90.43 | a | 100.93 | 101.76 | b | 102.37 | a | 88.75 | b | 79.52 | 62.18 | b | 54.36 | c | 78.23 | |||
1986 | 62.00 | a | 65.15 | a | 74.34 | b | 78.45 | a | 90.21 | b | 100.60 | 99.33 | a | 100.73 | a | 90.36 | b | 75.07 | c | 66.38 | f | 53.86 | b | 80.92 | a | |
1987 | 53.19 | e | 59.92 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.56 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.83 | 60.11 | 67.87 | 76.25 | 85.18 | 95.70 | 99.05 | 95.73 | 90.09 | 77.10 | 62.93 | 53.43 | 76.54 | |||||||||||||
S.D. | 4.60 | 3.75 | 4.39 | 3.99 | 3.96 | 3.18 | 3.14 | 3.59 | 4.33 | 4.54 | 3.77 | 4.70 | 1.42 | |||||||||||||
SKEW | -0.51 | 0.08 | 0.69 | 0.28 | -0.08 | -0.31 | -0.44 | -0.86 | -0.37 | -0.76 | -0.89 | 1.59 | -0.60 | |||||||||||||
MAX | 62.00 | 68.52 | 81.97 | 83.77 | 93.24 | 102.77 | 105.90 | 102.37 | 102.33 | 84.29 | 68.67 | 73.03 | 78.53 | |||||||||||||
MIN | 40.19 | 52.46 | 59.13 | 69.33 | 76.70 | 85.90 | 90.47 | 84.17 | 75.64 | 65.48 | 52.84 | 44.87 | 73.60 | |||||||||||||
YRS | 54 | 52 | 51 | 49 | 51 | 52 | 49 | 46 | 49 | 47 | 46 | 43 | 24 |