| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1906 | 59.32 | i | 60.85 | a | 64.61 | 69.33 | 78.52 | h | ----- | z | ----- | z | ----- | z | ----- | z | 76.61 | 64.67 | 58.94 | 65.84 | ||||||
| 1907 | 56.06 | 63.54 | 70.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.57 | ----- | z | 62.30 | |||||
| 1908 | 49.50 | m | 56.41 | 67.10 | 64.83 | l | ----- | z | 92.00 | i | 85.61 | 82.71 | 81.40 | 73.71 | 62.83 | 56.19 | 70.75 | |||||||||
| 1909 | 63.00 | 58.14 | 59.87 | 72.83 | 78.03 | 91.30 | 88.94 | 83.06 | 80.67 | 78.56 | f | 68.67 | 54.13 | 72.60 | ||||||||||||
| 1910 | 58.68 | 60.07 | 70.52 | 74.10 | 83.23 | 89.53 | 88.87 | 87.58 | 84.73 | 78.74 | 68.50 | 64.19 | 75.73 | |||||||||||||
| 1911 | 60.39 | 57.36 | 67.65 | 70.90 | 80.94 | 85.90 | 82.35 | 86.87 | 81.70 | 73.90 | 61.00 | 50.90 | 71.65 | |||||||||||||
| 1912 | 59.52 | 60.90 | 61.19 | 65.57 | 79.10 | 86.53 | 85.47 | a | 81.87 | 81.60 | 69.77 | a | 60.90 | 50.94 | 70.28 | |||||||||||
| 1913 | 51.52 | 53.57 | 61.10 | 69.83 | 79.74 | 85.90 | 87.90 | 84.58 | 78.57 | 75.16 | 61.83 | 49.45 | 69.93 | |||||||||||||
| 1914 | 58.03 | 58.32 | 65.48 | 72.23 | 81.81 | 86.17 | 82.10 | 85.39 | 79.47 | 69.23 | 61.80 | 48.35 | 70.70 | |||||||||||||
| 1915 | 49.77 | 54.43 | 58.58 | 68.23 | ----- | z | ----- | z | 87.03 | 82.42 | 79.40 | 74.84 | 64.87 | 53.19 | 67.28 | |||||||||||
| 1916 | 52.26 | 60.69 | 67.23 | 69.97 | 76.32 | 81.93 | c | 84.39 | 80.58 | 77.77 | 72.03 | 62.80 | 51.90 | 69.82 | ||||||||||||
| 1917 | 50.61 | 55.64 | 62.42 | 69.30 | 72.94 | 89.13 | 88.19 | 84.35 | 78.93 | 75.00 | 65.70 | 61.42 | 71.14 | |||||||||||||
| 1918 | 51.84 | 60.39 | 62.58 | 69.67 | 75.90 | 87.37 | 84.94 | 81.32 | 82.07 | 72.23 | 54.63 | 47.45 | 69.20 | |||||||||||||
| 1919 | 48.77 | 52.14 | 62.35 | 72.00 | 78.65 | 86.73 | 82.03 | 84.10 | 77.63 | 71.42 | 58.00 | 54.10 | 68.99 | |||||||||||||
| 1920 | 50.81 | 58.45 | 61.03 | 68.86 | i | 80.55 | 85.13 | 89.23 | 81.74 | 81.17 | 70.16 | 59.43 | 53.03 | 70.07 | ||||||||||||
| 1921 | 55.77 | 58.15 | a | 66.61 | 70.73 | 79.13 | 88.77 | 82.39 | 79.29 | 81.47 | 75.03 | 64.72 | e | 56.35 | 71.53 | |||||||||||
| 1922 | 50.26 | 59.25 | 63.13 | 66.13 | g | 85.00 | n | 90.37 | 87.74 | 85.52 | 80.40 | 72.52 | 55.67 | 56.06 | 70.09 | |||||||||||
| 1923 | 57.74 | 51.64 | 59.81 | 70.70 | 81.84 | 88.77 | 85.74 | 78.74 | 77.40 | 72.13 | 55.20 | 45.10 | 68.73 | |||||||||||||
| 1924 | 50.26 | 59.83 | 59.52 | 67.60 | 79.94 | 93.43 | 85.90 | 87.32 | 82.87 | 75.23 | 63.13 | 45.29 | 70.86 | |||||||||||||
| 1925 | 46.23 | 59.50 | 67.58 | 74.57 | 82.03 | 84.37 | 85.71 | 80.77 | 78.57 | 69.26 | 54.87 | 43.00 | 68.87 | |||||||||||||
| 1926 | 42.29 | 56.71 | 57.61 | 61.40 | 74.16 | 87.53 | 85.48 | 85.68 | 80.07 | 70.45 | 54.90 | 44.00 | 66.69 | |||||||||||||
| 1927 | 53.00 | c | 59.00 | 61.35 | 69.43 | 81.74 | 86.83 | 87.32 | 81.03 | 77.97 | 70.68 | 61.50 | 43.84 | 69.48 | ||||||||||||
| 1928 | 51.00 | 54.21 | 64.90 | 70.03 | 76.16 | 88.87 | 88.03 | 80.65 | 79.97 | 70.68 | 50.67 | 44.19 | 68.28 | |||||||||||||
| 1929 | 47.61 | 51.07 | 58.87 | 68.23 | 78.00 | i | 89.60 | 83.39 | 79.61 | 77.00 | 66.97 | 49.27 | 49.26 | 65.53 | ||||||||||||
| 1930 | 46.61 | 58.64 | 58.39 | 71.62 | a | 74.55 | 85.87 | 81.97 | 82.19 | 80.13 | 69.97 | 51.33 | 41.32 | 66.88 | ||||||||||||
| 1931 | 44.32 | 50.39 | 62.71 | 67.63 | 78.26 | 86.53 | 86.52 | 80.39 | 80.37 | 76.83 | a | 55.77 | 49.32 | 68.25 | ||||||||||||
| 1932 | 50.48 | 60.69 | 63.32 | 73.97 | 80.61 | 89.60 | 86.42 | 86.42 | 82.27 | 72.71 | 66.10 | 51.74 | 72.03 | |||||||||||||
| 1933 | 52.39 | 55.29 | 69.35 | 69.37 | 78.68 | 87.70 | 87.29 | 83.90 | 81.50 | 68.48 | 57.30 | 50.26 | 70.13 | |||||||||||||
| 1934 | 50.35 | 60.07 | 68.35 | 72.33 | 82.32 | 87.47 | 87.81 | 83.94 | 82.07 | 75.00 | 56.77 | 50.42 | 71.41 | |||||||||||||
| 1935 | 50.77 | 52.89 | 62.29 | 70.27 | 73.23 | 87.47 | 88.19 | 80.90 | 77.63 | 71.90 | 56.10 | 46.90 | 68.21 | |||||||||||||
| 1936 | 50.03 | 55.18 | a | 61.77 | 71.10 | 79.97 | 90.20 | 89.87 | 88.94 | 81.37 | 74.90 | 59.20 | 54.42 | 71.41 | ||||||||||||
| 1937 | 49.48 | 58.64 | 63.42 | 75.17 | 82.87 | 89.70 | 91.65 | 89.42 | ----- | z | ----- | z | ----- | z | ----- | z | 75.04 | |||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 52.00 | 57.25 | 63.46 | 70.29 | 78.95 | 87.81 | 86.28 | 83.38 | 80.21 | 72.60 | 59.60 | 50.86 | 70.01 | |||||||||||||
| S.D. | 4.81 | 3.34 | 3.62 | 2.85 | 3.02 | 2.33 | 2.53 | 2.92 | 1.90 | 2.82 | 5.08 | 5.52 | 1.95 | |||||||||||||
| SKEW | 0.41 | -0.46 | 0.34 | -0.86 | -0.55 | -0.07 | -0.20 | 0.41 | 0.13 | 0.11 | -0.13 | 0.39 | 0.78 | |||||||||||||
| MAX | 63.00 | 63.54 | 70.52 | 75.17 | 83.23 | 93.43 | 91.65 | 89.42 | 84.73 | 78.74 | 68.67 | 64.19 | 75.73 | |||||||||||||
| MIN | 42.29 | 50.39 | 57.61 | 61.40 | 72.94 | 81.93 | 81.97 | 78.74 | 77.00 | 66.97 | 49.27 | 41.32 | 66.69 | |||||||||||||
| NO YRS | 30 | 32 | 32 | 28 | 26 | 28 | 30 | 30 | 29 | 29 | 31 | 30 | 23 | |||||||||||||