| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 93.80 | g | 100.35 | 97.35 | 87.73 | 73.08 | 59.68 | 51.60 | 78.30 | |||||||
| 1912 | 52.81 | 60.00 | 65.52 | 71.63 | 82.40 | 90.27 | 95.18 | 96.06 | 83.12 | 71.82 | 59.20 | 48.94 | 73.08 | |||||||||||||
| 1913 | 45.71 | 57.27 | 63.18 | 77.05 | 84.71 | 92.30 | 98.65 | 100.52 | 92.75 | 82.45 | 72.27 | 61.76 | 77.38 | |||||||||||||
| 1914 | 66.03 | 67.30 | 73.47 | ----- | z | ----- | z | ----- | z | ----- | z | 99.80 | a | ----- | z | 81.89 | 72.62 | ----- | z | 76.85 | ||||||
| 1915 | 64.52 | a | 61.82 | 69.81 | 78.13 | ----- | z | ----- | z | ----- | z | 106.24 | b | ----- | z | 76.08 | 60.33 | ----- | z | 73.85 | ||||||
| 1916 | ----- | z | 58.50 | z | ----- | z | ----- | z | 84.50 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.50 | ||
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 107.00 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 107.00 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.37 | 44.89 | 49.63 | |||
| 1919 | 42.95 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 101.73 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.34 | |||
| 1920 | ----- | z | 59.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1924 | ----- | z | 60.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | 57.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | 68.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | 65.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.00 | 57.37 | 60.19 | |||
| 1938 | 55.85 | 58.43 | 64.24 | 76.27 | 83.73 | 94.68 | 99.69 | j | 98.60 | 91.95 | 74.94 | 57.02 | 55.47 | 73.74 | ||||||||||||
| 1939 | 53.06 | 53.41 | 67.10 | 78.50 | 86.56 | 93.50 | 101.12 | g | 101.07 | h | 87.40 | ----- | z | 62.60 | 54.76 | 70.77 | ||||||||||
| 1940 | 54.26 | 58.79 | a | 70.40 | 76.82 | 88.42 | 99.02 | 100.05 | 100.97 | 88.23 | 76.06 | 59.40 | 52.39 | 77.07 | ||||||||||||
| 1941 | 53.65 | 58.95 | 65.74 | 70.13 | 86.31 | 91.45 | 100.20 | a | 94.63 | 85.23 | 72.15 | 61.97 | 53.32 | 74.48 | ||||||||||||
| 1942 | 53.18 | 57.16 | 65.44 | 75.90 | 81.77 | 94.63 | 104.87 | a | 99.32 | 88.37 | 77.45 | ----- | z | 54.71 | 77.53 | |||||||||||
| 1943 | 54.32 | 60.45 | 69.23 | 79.17 | 86.94 | 90.10 | 101.27 | 99.02 | 91.23 | 78.96 | f | 61.43 | 55.48 | 77.15 | ||||||||||||
| 1944 | 52.60 | 57.33 | 65.97 | 72.73 | 83.68 | 87.07 | 97.63 | 96.39 | 89.18 | 76.73 | 61.03 | 51.21 | 74.29 | |||||||||||||
| 1945 | 50.87 | 56.80 | 61.55 | 71.63 | 81.24 | 89.50 | 100.98 | 94.19 | 89.02 | 73.97 | 58.93 | 46.42 | 72.93 | |||||||||||||
| 1946 | 50.77 | 55.54 | 66.65 | 81.60 | 86.15 | ----- | z | 98.81 | 99.35 | 91.80 | 76.21 | 58.97 | o | 56.18 | 76.30 | |||||||||||
| 1947 | 52.65 | 62.21 | 71.26 | 80.12 | 90.92 | 93.24 | g | 100.65 | 98.02 | 93.17 | 77.10 | 60.30 | 52.79 | 76.29 | ||||||||||||
| 1948 | 52.77 | 56.67 | ----- | z | 75.12 | 83.16 | 91.85 | 99.40 | 97.87 | 88.78 | 75.47 | 58.23 | 50.50 | 75.44 | ||||||||||||
| 1949 | 43.87 | 53.30 | 65.31 | 80.57 | 83.55 | 95.62 | e | 103.21 | g | 97.13 | 93.39 | h | 73.89 | 64.88 | 50.13 | 70.82 | ||||||||||
| 1950 | 46.58 | 61.38 | 66.39 | 78.60 | 83.90 | 90.72 | 100.84 | 98.40 | 88.73 | 79.84 | 66.12 | 56.31 | 76.48 | |||||||||||||
| 1951 | 52.44 | 57.70 | 66.61 | 77.22 | 86.48 | 95.73 | 102.82 | 99.37 | 93.22 | 76.61 | 62.10 | 52.03 | 76.86 | |||||||||||||
| 1952 | 50.53 | 58.60 | 60.35 | 75.42 | 82.50 | z | 89.70 | 100.87 | 102.29 | 92.23 | 81.10 | 59.32 | 52.81 | 74.84 | ||||||||||||
| 1953 | 56.02 | 58.25 | 68.19 | 77.37 | 78.82 | 92.10 | 104.58 | 98.82 | 91.92 | 77.63 | 64.93 | 53.13 | 76.81 | |||||||||||||
| 1954 | 52.06 | 63.64 | 64.27 | 81.00 | 90.92 | 93.13 | 103.08 | 96.45 | a | 91.26 | a | 77.29 | 64.38 | 50.87 | 77.36 | |||||||||||
| 1955 | 48.98 | 54.32 | 67.50 | a | 72.35 | 82.23 | 93.23 | 99.44 | 101.55 | 90.14 | e | 78.13 | ----- | z | 54.63 | a | 76.59 | |||||||||
| 1956 | 54.69 | 53.74 | 67.72 | b | 74.52 | e | 91.40 | p | 95.92 | 99.37 | 97.10 | 92.48 | 76.71 | 61.97 | 52.24 | 75.13 | ||||||||||
| 1957 | 50.45 | 63.84 | 75.06 | e | 78.58 | 79.45 | 96.83 | 100.23 | 98.74 | ----- | z | ----- | z | ----- | z | ----- | z | 80.40 | ||||||||
| 1958 | ----- | z | ----- | z | 64.40 | 75.08 | 89.30 | a | 94.78 | a | 100.98 | a | 102.94 | 93.67 | 81.35 | 61.90 | a | 54.05 | 81.84 | |||||||
| 1959 | 56.31 | 58.70 | 71.52 | 81.45 | 84.31 | e | 99.37 | 106.31 | 99.90 | 89.18 | 79.87 | 62.70 | b | 54.11 | 78.64 | |||||||||||
| 1960 | 50.37 | 57.67 | 72.37 | 80.33 | 86.02 | 100.37 | 104.20 | a | 101.17 | a | 93.63 | 77.79 | 59.55 | k | 53.34 | 79.75 | ||||||||||
| 1961 | 51.45 | 61.43 | 68.56 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.48 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 52.49 | 58.69 | 67.33 | 76.82 | 84.81 | 93.56 | 101.18 | 98.97 | 90.18 | 77.02 | 62.03 | 53.02 | 75.94 | |||||||||||||
| S.D. | 4.94 | 3.36 | 3.52 | 3.26 | 3.17 | 3.40 | 2.71 | 2.59 | 2.73 | 2.90 | 4.08 | 3.35 | 1.92 | |||||||||||||
| SKEW | 0.71 | 0.46 | 0.27 | -0.37 | 0.20 | 0.27 | 0.31 | 0.58 | -0.75 | 0.13 | 1.03 | -0.09 | -0.47 | |||||||||||||
| MAX | 66.03 | 67.30 | 75.06 | 81.60 | 90.92 | 100.37 | 107.00 | 106.24 | 93.67 | 82.45 | 72.62 | 61.76 | 78.64 | |||||||||||||
| MIN | 42.95 | 53.30 | 60.35 | 70.13 | 78.82 | 87.07 | 95.18 | 94.19 | 83.12 | 71.82 | 54.37 | 44.89 | 72.93 | |||||||||||||
| NO YRS | 28 | 27 | 27 | 26 | 24 | 23 | 25 | 27 | 24 | 25 | 25 | 27 | 11 | |||||||||||||