| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1906 | 43.11 | i | 46.52 | a | 50.77 | 55.80 | 62.72 | h | ----- | z | ----- | z | ----- | z | ----- | z | 59.92 | 50.60 | 46.06 | 51.61 | ||||||
| 1907 | 43.39 | 48.70 | 54.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.62 | ----- | z | 48.24 | |||||
| 1908 | 38.06 | n | 43.66 | 52.37 | 52.33 | l | ----- | z | 73.52 | i | 72.37 | 69.66 | 66.23 | 54.65 | 46.40 | 42.11 | 55.93 | |||||||||
| 1909 | 46.85 | 43.11 | 44.74 | 55.40 | 59.85 | 71.68 | 74.69 | 69.95 | 64.88 | 58.02 | f | 49.47 | 38.68 | 56.30 | ||||||||||||
| 1910 | 42.52 | 42.80 | 52.65 | 54.98 | 64.61 | 71.63 | 73.37 | 72.81 | 68.92 | 59.26 | 49.12 | 44.52 | 58.10 | |||||||||||||
| 1911 | 44.56 | 41.88 | 51.47 | 53.57 | 61.55 | 68.02 | 68.89 | 70.24 | 67.05 | 55.32 | 44.80 | 34.26 | 55.13 | |||||||||||||
| 1912 | 41.26 | 40.74 | 46.79 | 48.82 | 60.53 | 67.92 | 69.62 | a | 67.32 | 62.98 | 53.23 | a | 42.23 | 34.37 | 52.98 | |||||||||||
| 1913 | 35.58 | 39.18 | 43.11 | 50.83 | 58.87 | 65.13 | 70.94 | 68.32 | 61.18 | 55.73 | 46.48 | 34.98 | 52.53 | |||||||||||||
| 1914 | 40.52 | 40.77 | 45.74 | 53.37 | 60.74 | 67.20 | 67.79 | 69.23 | 63.55 | 52.92 | 45.60 | 35.10 | 53.54 | |||||||||||||
| 1915 | 34.13 | 38.57 | 41.35 | 50.73 | ----- | z | ----- | z | 73.02 | ----- | z | 64.69 | a | 57.00 | 47.43 | 40.00 | a | 49.66 | ||||||||
| 1916 | 40.55 | 46.02 | 51.73 | 53.65 | 59.66 | 68.78 | c | 71.32 | 68.68 | 63.93 | 56.18 | 45.50 | 37.34 | 55.28 | ||||||||||||
| 1917 | 39.31 | 40.68 | 45.23 | 53.10 | 56.68 | 70.83 | 74.11 | 70.11 | 65.17 | 57.95 | 47.97 | 43.39 | 55.38 | |||||||||||||
| 1918 | 38.16 | 45.52 | 48.19 | 53.43 | 59.24 | 72.22 | 71.68 | 68.23 | 67.00 | 57.08 | 42.48 | 35.55 | 54.90 | |||||||||||||
| 1919 | 34.40 | 38.04 | 46.40 | 55.18 | 62.06 | 69.40 | 70.18 | 69.95 | 64.62 | 55.45 | 44.78 | 40.52 | 54.25 | |||||||||||||
| 1920 | 38.65 | 45.59 | 47.18 | 51.21 | i | 62.08 | 68.60 | 73.85 | 69.03 | 65.80 | 54.89 | 44.03 | 38.02 | 55.25 | ||||||||||||
| 1921 | 41.26 | 42.76 | a | 50.56 | 53.78 | 61.26 | 70.62 | 70.71 | 68.08 | 66.95 | 58.42 | 47.58 | e | 43.16 | 56.26 | |||||||||||
| 1922 | 37.26 | 44.32 | 45.26 | 50.76 | g | 66.35 | n | 72.50 | 73.87 | 71.63 | 66.82 | 57.21 | 41.58 | 42.52 | 55.30 | |||||||||||
| 1923 | 42.68 | 39.05 | 44.61 | 54.70 | 63.69 | 69.55 | 72.29 | 67.52 | 63.17 | 54.76 | 43.95 | 35.45 | 54.29 | |||||||||||||
| 1924 | 35.71 | 43.14 | 44.44 | 51.55 | 63.06 | 74.82 | 72.66 | 72.74 | 66.78 | 57.61 | 47.17 | 36.18 | 55.49 | |||||||||||||
| 1925 | 33.31 | 44.02 | 49.19 | 56.90 | 64.16 | 69.23 | 72.60 | 68.19 | 64.70 | 55.84 | 41.47 | 33.26 | 54.41 | |||||||||||||
| 1926 | 31.23 | 42.54 | 45.19 | 49.75 | 58.61 | 70.13 | 70.81 | 71.29 | 67.45 | 56.24 | 43.28 | 35.53 | 53.50 | |||||||||||||
| 1927 | 40.12 | c | 46.34 | 46.26 | 53.23 | 63.05 | 69.97 | 73.05 | 68.50 | 65.10 | 54.92 | 47.90 | 34.39 | 55.24 | ||||||||||||
| 1928 | 37.73 | 40.86 | 49.27 | 53.97 | 61.55 | 73.02 | 73.02 | 68.55 | 65.03 | 57.55 | 40.58 | 33.45 | 54.55 | |||||||||||||
| 1929 | 34.81 | 39.09 | 44.56 | 51.53 | 61.32 | i | 71.35 | 71.97 | 67.82 | 64.85 | 53.94 | 37.18 | 36.71 | 52.16 | ||||||||||||
| 1930 | 36.87 | 43.05 | 44.53 | 56.55 | a | 57.74 | 70.38 | 70.37 | 69.34 | 64.67 | 54.31 | 40.87 | 31.34 | 53.34 | ||||||||||||
| 1931 | 32.92 | 39.68 | 46.58 | 53.03 | 61.39 | 73.83 | 79.21 | 73.39 | 73.27 | 54.50 | t | 43.07 | 36.66 | 55.73 | ||||||||||||
| 1932 | 35.58 | 46.67 | 47.40 | 54.83 | 62.19 | 70.10 | 73.31 | 72.77 | 66.68 | 56.63 | 47.18 | 38.27 | 55.97 | |||||||||||||
| 1933 | 38.34 | 39.16 | 50.24 | 53.03 | 60.35 | 70.82 | 73.56 | 70.84 | 68.42 | 56.73 | 44.55 | 38.23 | 55.36 | |||||||||||||
| 1934 | 36.11 | 45.39 | 51.74 | 56.90 | 66.56 | 70.35 | 73.84 | 71.44 | 66.98 | 58.40 | 45.02 | 39.53 | 56.86 | |||||||||||||
| 1935 | 39.45 | 40.55 | 47.29 | 54.57 | 57.47 | 70.88 | 74.21 | 69.35 | 64.00 | 56.68 | 43.40 | 36.16 | 54.50 | |||||||||||||
| 1936 | 37.31 | 42.57 | a | 48.15 | 55.12 | 63.10 | 72.53 | 74.90 | 73.76 | 66.52 | 57.76 | 45.37 | 39.55 | 56.39 | ||||||||||||
| 1937 | 35.13 | 43.25 | 47.31 | 56.65 | 64.62 | a | 70.80 | 74.79 | 74.15 | ----- | z | ----- | z | ----- | z | ----- | z | 58.34 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.19 | 42.63 | 47.64 | 53.75 | 61.33 | 70.44 | 72.57 | 70.10 | 65.77 | 56.31 | 44.96 | 37.84 | 54.92 | |||||||||||||
| S.D. | 3.70 | 2.78 | 3.13 | 2.12 | 2.43 | 2.06 | 2.19 | 2.00 | 2.24 | 1.75 | 2.96 | 3.67 | 1.33 | |||||||||||||
| SKEW | 0.32 | 0.18 | 0.27 | -0.50 | 0.03 | -0.26 | 0.38 | 0.54 | 1.02 | -0.02 | -0.38 | 0.51 | 0.28 | |||||||||||||
| MAX | 46.85 | 48.70 | 54.26 | 56.90 | 66.56 | 74.82 | 79.21 | 74.15 | 73.27 | 59.92 | 50.60 | 46.06 | 58.10 | |||||||||||||
| MIN | 31.23 | 38.04 | 41.35 | 48.82 | 56.68 | 65.13 | 67.79 | 67.32 | 61.18 | 52.92 | 37.18 | 31.34 | 52.53 | |||||||||||||
| NO YRS | 30 | 32 | 32 | 28 | 26 | 28 | 30 | 29 | 29 | 28 | 31 | 30 | 22 | |||||||||||||