YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1898 | ----- | z | ----- | z | ----- | z | 65.97 | 66.03 | 78.60 | 85.90 | 87.00 | 75.43 | 56.13 | 43.90 | 34.80 | a | 65.97 | c | ||||||||
1899 | 32.45 | 22.39 | 37.32 | 57.60 | 66.48 | 76.60 | 84.35 | 83.23 | 78.50 | 57.39 | 55.20 | 36.39 | 57.33 | |||||||||||||
1900 | 39.23 | 34.96 | 49.39 | 64.53 | 77.52 | 89.53 | 88.39 | 83.48 | 71.40 | 63.32 | 44.93 | 43.29 | 62.50 | |||||||||||||
1901 | 36.40 | a | 34.79 | 52.74 | 64.80 | 77.74 | 74.57 | 91.35 | 88.60 | a | 69.00 | 68.03 | a | 55.90 | a | 40.30 | a | 62.85 | ||||||||
1902 | 36.48 | 40.11 | 46.42 | 60.79 | b | 74.61 | 78.93 | 86.87 | 84.65 | 74.60 | 64.35 | 45.70 | 32.67 | a | 60.51 | |||||||||||
1903 | 38.74 | 32.93 | a | 45.84 | 61.53 | 69.42 | 82.60 | 84.71 | 84.17 | a | 69.27 | 65.13 | 41.53 | 39.23 | 59.59 | |||||||||||
1904 | 36.26 | 30.48 | 40.03 | a | 63.57 | 71.03 | 79.23 | 86.67 | a | 86.81 | 77.80 | 66.65 | 56.33 | 39.45 | 61.19 | |||||||||||
1905 | 30.23 | 29.21 | 55.68 | 59.83 | 65.03 | 75.63 | 84.84 | 89.29 | 79.90 | 58.03 | 50.00 | 36.26 | 59.49 | |||||||||||||
1906 | 36.39 | 40.32 | 39.77 | 66.55 | a | 68.81 | 76.67 | 87.52 | 83.23 | 77.80 | 65.26 | 44.73 | 34.74 | 60.15 | ||||||||||||
1907 | 19.97 | 38.29 | 53.63 | a | 58.03 | 64.19 | 75.67 | 84.48 | 83.55 | 72.30 | 67.61 | 53.60 | 40.77 | 59.34 | ||||||||||||
1908 | 46.00 | k | 41.89 | j | 48.74 | 66.07 | 68.26 | 76.23 | 90.06 | 82.61 | 78.07 | 58.00 | 52.20 | 36.10 | 65.63 | b | ||||||||||
1909 | 28.19 | 37.79 | 50.48 | 53.03 | 68.58 | 81.21 | a | 89.52 | 90.84 | 75.20 | 63.81 | 49.43 | 23.32 | 59.28 | ||||||||||||
1910 | 31.74 | 28.50 | 64.06 | 75.67 | u | 74.53 | l | 88.45 | h | 93.13 | 84.61 | 75.87 | 67.52 | 45.33 | 34.71 | 58.39 | c | |||||||||
1911 | 30.74 | 30.39 | 54.81 | 60.57 | 78.38 | w | 85.27 | 87.29 | 83.17 | b | 75.00 | 57.52 | 37.27 | 32.87 | 57.72 | a | ||||||||||
1912 | 27.81 | 37.72 | 33.03 | 62.32 | b | 69.35 | 83.20 | 81.23 | 80.50 | a | 64.41 | a | 57.40 | a | 50.37 | 42.87 | 57.52 | |||||||||
1913 | 30.40 | a | 30.85 | a | 38.16 | 66.60 | 69.90 | 81.47 | 85.19 | 86.52 | d | 75.86 | a | 58.25 | c | 54.00 | d | 40.10 | 59.78 | |||||||
1914 | 43.84 | 37.39 | e | 51.74 | 63.43 | 73.77 | a | 80.17 | 89.77 | 85.77 | 76.00 | a | 62.97 | 58.14 | a | 27.55 | 62.55 | |||||||||
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.53 | l | 87.68 | 78.80 | 58.42 | g | 60.07 | 34.58 | 65.28 | h | ||||
1918 | 28.39 | 35.39 | 53.58 | 65.17 | a | 73.97 | 90.47 | 89.23 | 89.84 | 77.83 | 71.90 | 42.97 | 45.68 | 63.70 | ||||||||||||
1919 | 48.45 | 34.14 | 48.03 | 66.67 | 78.87 | 92.00 | 94.87 | 92.68 | 85.80 | 55.97 | b | 37.40 | 31.79 | c | 63.89 | |||||||||||
1920 | 33.00 | 37.24 | 43.28 | b | 47.93 | a | 72.24 | b | 85.37 | 91.33 | a | 88.81 | 81.72 | a | 67.39 | 46.83 | 39.55 | 61.22 | ||||||||
1921 | 47.61 | 49.36 | 54.68 | 58.47 | 60.29 | 89.23 | 93.03 | a | 91.74 | 79.17 | a | 73.23 | 45.47 | 35.71 | 64.83 | |||||||||||
1922 | 25.10 | 26.50 | 44.00 | 61.00 | a | 65.23 | a | 86.67 | 89.71 | 95.84 | 87.33 | 73.42 | 51.93 | c | 32.19 | 61.58 | ||||||||||
1923 | 45.50 | a | 34.61 | 47.77 | 54.57 | 67.42 | 82.73 | 93.52 | 83.07 | a | 76.53 | 58.71 | 53.47 | 43.29 | 61.77 | |||||||||||
1924 | 28.65 | 41.69 | 40.71 | 60.77 | 69.84 | 79.10 | 87.58 | 86.42 | 79.37 | 73.32 | 50.20 | 26.60 | a | 60.35 | ||||||||||||
1925 | 36.87 | 48.36 | 48.48 | 65.77 | 68.52 | d | 84.60 | 90.83 | a | 89.23 | 76.80 | e | 49.37 | a | 47.70 | 45.19 | 62.64 | |||||||||
1926 | 38.19 | 45.35 | e | 51.79 | c | 64.73 | 78.23 | a | 87.83 | 92.03 | b | 89.32 | 70.00 | 69.13 | 48.80 | 33.94 | 64.11 | |||||||||
1927 | 29.40 | a | 37.71 | 48.77 | a | 52.67 | 57.57 | a | 72.27 | d | 78.55 | 72.84 | 65.45 | a | 61.86 | b | 39.10 | 17.71 | c | 52.82 | ||||||
1928 | 28.83 | a | 34.28 | 50.42 | 51.20 | 73.63 | a | 71.47 | 81.58 | 82.53 | a | 78.18 | h | 61.27 | a | 50.66 | a | 35.48 | f | 58.59 | b | |||||
1929 | 21.35 | 26.07 | 45.55 | 58.56 | c | 73.64 | c | 82.10 | a | 94.52 | b | 92.68 | 70.63 | 67.58 | 41.93 | 35.87 | 59.21 | |||||||||
1930 | 21.42 | 48.96 | 47.97 | 71.13 | 72.00 | 90.23 | 94.23 | 90.84 | 76.93 | a | 55.19 | 52.60 | 46.32 | 63.99 | ||||||||||||
1931 | 43.94 | 48.10 | g | 45.55 | 63.30 | 77.04 | d | 89.53 | 92.06 | 88.13 | 76.43 | 63.78 | d | 46.60 | 32.77 | a | 65.38 | a | ||||||||
1932 | 28.87 | 38.03 | 37.00 | 62.17 | 73.58 | 91.00 | q | 93.63 | a | 88.68 | 73.90 | 54.48 | 48.57 | 30.65 | 57.23 | a | ||||||||||
1933 | 34.00 | 31.57 | 50.16 | 53.96 | d | 68.61 | 92.12 | m | 97.45 | 87.68 | 78.13 | 67.29 | 53.23 | 36.68 | 59.89 | a | ||||||||||
1934 | 42.06 | 47.96 | 53.61 | 67.37 | 86.35 | 86.00 | 95.26 | 90.52 | 72.07 | 65.90 | 50.70 | 38.35 | 66.35 | |||||||||||||
1935 | 29.28 | f | 49.64 | 47.94 | 58.50 | 67.90 | 79.73 | 96.71 | 88.68 | 78.60 | 62.42 | 42.40 | 42.61 | 65.01 | a | |||||||||||
1936 | 31.03 | 10.76 | 45.94 | 58.73 | 82.13 | 87.43 | 99.97 | 90.71 | c | 77.87 | 65.55 | 47.60 | 37.03 | 61.23 | ||||||||||||
1937 | 16.61 | 30.71 | 45.97 | 68.04 | f | 79.61 | 79.47 | 94.06 | 93.52 | 82.40 | 71.29 | 47.55 | a | 36.06 | 61.57 | a | ||||||||||
1938 | 40.03 | 37.54 | 50.65 | 62.13 | 68.32 | 82.60 | 88.00 | 87.42 | 85.53 | 70.16 | 44.57 | 44.97 | 63.49 | |||||||||||||
1939 | 46.61 | 31.71 | 53.45 | 66.20 | 78.00 | a | 76.87 | 96.26 | 88.94 | 79.50 | 66.61 | 61.87 | 51.16 | 66.43 | ||||||||||||
1940 | 29.35 | 40.69 | 53.42 | 57.70 | 77.94 | 85.53 | 93.52 | 94.13 | 83.83 | 70.19 | 41.63 | 42.77 | 64.23 | |||||||||||||
1941 | 41.29 | 50.46 | 52.23 | a | 60.90 | 77.97 | 82.67 | 91.61 | 88.68 | 70.97 | 62.52 | 51.20 | 38.58 | 64.09 | ||||||||||||
1942 | 36.03 | 35.86 | 49.81 | 67.10 | 67.16 | 76.87 | 91.03 | 89.23 | 75.20 | 68.00 | 48.57 | 39.61 | 62.04 | |||||||||||||
1943 | 26.94 | 47.39 | 43.06 | 69.60 | 66.90 | 76.07 | 92.27 | a | 90.45 | 80.97 | 70.58 | 51.07 | 47.77 | 63.59 | ||||||||||||
1944 | 45.55 | 39.28 | 43.13 | 62.93 | 75.48 | 74.03 | 85.97 | 85.94 | 78.60 | 72.37 | a | 49.00 | a | 39.90 | 62.68 | |||||||||||
1945 | 39.73 | a | 41.07 | 54.16 | 58.63 | 68.90 | 73.30 | 91.77 | 89.35 | 76.03 | 70.03 | 47.60 | 35.23 | 62.15 | ||||||||||||
1946 | 42.61 | 43.00 | 58.55 | 72.07 | 70.35 | 80.60 | 92.58 | 87.19 | 74.97 | a | 55.83 | a | 44.03 | 38.65 | 63.37 | |||||||||||
1947 | 37.39 | 37.86 | 43.77 | 60.40 | 72.87 | 74.70 | 93.57 | a | 91.84 | 76.53 | 70.42 | 42.57 | 39.42 | 61.78 | ||||||||||||
1948 | 40.94 | 37.45 | 44.29 | 66.90 | 74.03 | 78.23 | 87.23 | a | 91.35 | 81.83 | a | 71.03 | 47.50 | 32.30 | a | 62.76 | ||||||||||
1949 | 20.58 | 31.96 | 45.32 | 70.30 | 76.13 | 81.10 | 92.39 | 92.55 | 76.88 | f | 57.53 | a | 61.20 | 33.90 | 60.27 | a | ||||||||||
1950 | 13.35 | 40.82 | 44.32 | 59.33 | 67.87 | 77.30 | 84.83 | a | 85.86 | c | 72.29 | b | 68.81 | 44.17 | 40.94 | 58.32 | ||||||||||
1951 | 28.77 | a | 40.96 | 37.61 | 58.24 | a | 72.27 | a | 73.04 | b | 89.11 | d | 85.03 | b | 69.90 | 58.19 | 48.39 | b | 23.96 | f | 60.14 | a | ||||
1952 | 27.03 | a | 38.55 | 42.23 | a | 69.93 | b | 72.68 | c | 84.89 | b | 89.72 | b | 88.10 | a | 82.82 | b | 70.23 | a | 47.69 | a | 42.27 | a | 63.01 | ||
1953 | 46.00 | a | 45.04 | b | 54.55 | b | 54.75 | b | 65.86 | b | 79.45 | a | 91.81 | 89.81 | 80.52 | c | 71.00 | c | 56.30 | 45.33 | d | 65.03 | ||||
1954 | 29.06 | 52.96 | c | 41.16 | 57.55 | a | 68.26 | d | 76.73 | 93.53 | a | 87.89 | c | 76.38 | a | 63.13 | a | 58.20 | 45.55 | 62.53 | ||||||
1955 | 40.27 | a | 34.21 | 40.59 | b | 59.17 | 69.90 | a | 74.77 | 88.23 | a | 90.45 | b | 76.20 | 70.24 | b | 36.53 | 33.23 | a | 59.48 | ||||||
1956 | 32.26 | 38.76 | 50.58 | 58.30 | 70.48 | 88.23 | 88.77 | a | 85.82 | c | 80.57 | 70.29 | 49.17 | 45.48 | 63.23 | |||||||||||
1957 | 24.30 | a | 41.96 | 49.93 | a | 56.07 | a | 70.86 | b | 76.33 | 91.97 | 88.26 | 75.57 | 59.93 | a | 45.63 | 50.06 | 60.91 | ||||||||
1958 | 50.39 | 38.79 | 46.10 | 59.87 | 81.06 | 75.27 | 82.61 | 91.27 | a | 81.10 | 70.47 | a | 50.80 | 36.94 | 63.72 | |||||||||||
1959 | 31.42 | 34.21 | 53.29 | 61.86 | a | 66.45 | 84.13 | 91.65 | 89.58 | 74.90 | a | 58.15 | r | 41.00 | 44.03 | 61.14 | a | |||||||||
1960 | 35.10 | 34.55 | 49.20 | a | 61.32 | b | 74.16 | 83.48 | a | 97.00 | 87.87 | 82.07 | a | 68.20 | a | 50.03 | 40.50 | a | 63.62 | |||||||
1961 | 38.16 | 50.57 | 56.52 | 58.40 | 72.45 | 90.97 | 91.93 | a | 94.32 | c | 68.37 | 61.07 | a | 42.47 | 34.97 | a | 63.35 | |||||||||
1962 | 30.13 | a | 35.08 | c | 44.33 | a | 67.14 | a | 69.53 | a | 81.23 | 85.61 | 87.27 | a | 75.00 | b | 69.67 | a | 52.83 | a | 45.00 | 61.90 | ||||
1963 | 27.74 | 45.15 | a | 56.10 | 59.47 | 72.14 | b | 78.60 | 91.67 | a | 92.58 | g | 82.26 | c | 75.43 | c | 54.44 | l | 34.45 | 62.30 | b | |||||
1964 | 38.97 | 43.93 | 46.97 | b | 62.31 | a | 71.84 | 76.07 | a | 93.03 | 85.20 | a | 74.10 | 70.16 | ----- | z | 31.26 | 63.08 | a | |||||||
1965 | 41.65 | 40.46 | 36.42 | 61.17 | 68.23 | 79.60 | 89.58 | 86.55 | 61.60 | 73.61 | 52.27 | 41.26 | 61.03 | |||||||||||||
1966 | 27.19 | 36.54 | 52.84 | 57.00 | 78.45 | 80.70 | 94.94 | 87.06 | 82.77 | 66.13 | 46.97 | 36.23 | 62.23 | |||||||||||||
1967 | 39.26 | 44.36 | 46.23 | 59.20 | 68.26 | 75.40 | 90.07 | a | 92.45 | 80.70 | 66.00 | 48.07 | 35.03 | 62.08 | ||||||||||||
1968 | 30.35 | 43.59 | 57.35 | 59.60 | 67.80 | a | 75.53 | 88.84 | 84.06 | 78.43 | 68.29 | 47.93 | 27.07 | c | 60.74 | |||||||||||
1969 | 17.29 | 34.00 | 42.27 | a | 68.03 | 74.45 | 76.03 | 87.86 | c | 92.77 | 82.57 | 51.87 | h | 53.70 | 41.16 | 60.92 | a | |||||||||
1970 | 31.13 | 43.89 | 41.68 | 52.80 | 71.77 | 82.69 | a | 91.10 | 94.16 | 74.47 | 61.48 | 45.77 | 36.10 | 60.59 | ||||||||||||
1971 | 29.52 | 37.00 | 48.32 | 60.77 | 71.26 | 82.03 | 88.70 | a | 96.87 | a | 75.53 | 60.81 | 48.93 | 32.67 | a | 61.03 | ||||||||||
1972 | 29.47 | a | 39.03 | 55.71 | 61.87 | 70.71 | 84.47 | 85.39 | 88.87 | 74.20 | 63.76 | b | 47.47 | 30.61 | 60.96 | |||||||||||
1973 | 33.29 | 43.57 | 55.16 | 56.33 | 71.74 | 82.53 | 88.71 | 89.77 | 72.77 | 68.90 | 43.70 | 39.84 | 62.19 | |||||||||||||
1974 | 36.97 | a | 48.43 | 51.97 | 65.28 | a | 66.63 | a | 84.13 | 92.38 | b | 83.45 | 76.23 | 71.00 | d | 51.53 | 42.94 | 64.24 | ||||||||
1975 | 36.90 | 30.89 | 45.20 | a | 51.83 | 66.61 | 77.00 | b | 90.52 | 85.66 | b | 80.57 | 65.30 | k | 47.67 | 38.69 | b | 59.23 | a | |||||||
1976 | 35.90 | 47.00 | a | 49.20 | a | 64.32 | b | ----- | z | 78.50 | b | 91.93 | d | ----- | z | 82.04 | b | 63.62 | e | 52.35 | d | 42.94 | 60.78 | b | ||
1977 | 32.89 | d | 49.08 | c | 54.36 | f | 71.80 | e | 75.75 | c | 86.62 | d | 92.25 | g | 83.35 | 77.81 | c | 67.45 | b | 46.85 | c | 31.78 | d | 62.34 | b | |
1978 | 24.63 | d | 31.64 | c | 49.55 | b | 64.21 | f | 68.30 | d | 81.96 | d | 86.58 | e | 88.83 | h | 80.12 | e | 69.85 | e | 40.25 | f | 30.09 | i | 61.58 | d |
1979 | 19.74 | d | 34.22 | a | 49.38 | b | 60.35 | d | 72.12 | e | 82.59 | c | 90.44 | d | 89.54 | c | 86.15 | d | 73.39 | h | 47.58 | d | 51.27 | e | 62.13 | a |
1980 | 33.24 | b | 43.46 | c | 51.59 | i | 72.09 | h | 75.18 | n | 82.42 | f | 90.22 | d | 81.56 | f | 74.00 | a | 62.12 | f | ----- | z | 43.17 | s | 60.23 | h |
1981 | ----- | z | 42.90 | g | 57.71 | g | 62.86 | i | 67.48 | h | 75.80 | e | 88.78 | d | 89.88 | g | 82.32 | e | 60.24 | f | 49.86 | h | 34.13 | h | 82.30 | i |
1982 | 25.06 | o | 33.43 | g | 45.47 | l | 59.06 | m | 67.14 | j | 74.65 | j | 86.65 | k | 90.58 | g | 74.42 | f | 65.04 | f | 44.62 | f | 36.62 | j | ----- | z |
1983 | 46.11 | m | 51.92 | c | 56.42 | g | 59.71 | i | 69.27 | e | 81.94 | m | 93.38 | e | 95.89 | d | 75.92 | d | 67.40 | k | 47.90 | j | 15.78 | d | 67.03 | f |
1984 | 40.57 | j | 47.19 | h | 50.00 | n | 56.56 | l | 69.55 | i | 81.05 | k | 92.10 | k | 93.70 | k | 74.33 | i | 62.71 | g | 50.08 | f | 28.72 | m | ----- | z |
1985 | 29.58 | g | 33.91 | f | 47.04 | g | 66.23 | d | 80.12 | g | 80.72 | e | 90.13 | 83.50 | a | 68.21 | a | 61.81 | 26.45 | a | 33.71 | j | 68.15 | e | ||
1986 | 42.90 | 35.30 | a | 59.70 | a | 58.97 | 70.16 | 86.20 | 88.52 | 91.10 | 69.50 | 63.55 | 44.36 | b | 44.40 | a | 62.89 | |||||||||
1987 | 41.90 | 49.00 | 52.61 | 71.60 | 76.13 | 84.47 | 88.39 | 82.58 | 78.63 | 68.97 | 52.17 | 39.20 | a | 65.47 | ||||||||||||
1988 | 32.10 | a | 42.38 | c | 50.40 | a | 64.79 | k | 76.03 | 95.00 | 95.81 | 90.68 | 77.30 | 71.06 | 49.90 | 38.61 | 65.39 | a | ||||||||
1989 | 36.90 | 29.30 | a | 40.19 | 61.10 | 72.52 | 81.80 | 95.32 | ----- | z | 71.09 | s | ----- | z | 47.57 | w | 35.18 | t | 59.59 | e | ||||||
1990 | 43.12 | o | 37.07 | m | 49.28 | m | 65.23 | q | 66.94 | o | 82.42 | k | 90.88 | o | 95.14 | q | 91.14 | w | 61.15 | r | 53.35 | m | 31.35 | k | ----- | z |
1991 | 25.14 | q | 54.14 | n | 54.00 | q | 57.62 | f | 67.96 | d | 80.33 | f | 92.81 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.96 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 33.60 | 38.53 | 48.18 | 61.56 | 71.48 | 81.08 | 90.19 | 88.07 | 76.71 | 65.38 | 48.30 | 37.75 | 61.92 | |||||||||||||
S.D. | 7.87 | 7.39 | 6.00 | 5.11 | 4.83 | 5.14 | 3.92 | 3.95 | 4.93 | 5.58 | 5.78 | 6.55 | 2.33 | |||||||||||||
SKEW | -0.18 | -0.48 | -0.12 | -0.06 | 0.27 | 0.40 | -0.32 | -0.49 | -0.46 | -0.53 | -0.44 | -0.66 | -0.98 | |||||||||||||
MAX | 50.39 | 52.96 | 64.06 | 72.07 | 86.35 | 95.00 | 99.97 | 96.87 | 87.33 | 75.43 | 61.87 | 51.27 | 66.43 | |||||||||||||
MIN | 13.35 | 10.76 | 33.03 | 47.93 | 57.57 | 71.47 | 78.55 | 72.84 | 61.60 | 49.37 | 26.45 | 15.78 | 52.82 | |||||||||||||
YRS | 81 | 82 | 81 | 80 | 82 | 82 | 86 | 82 | 85 | 79 | 81 | 81 | 60 |