| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1906 | 26.91 | i | 32.25 | 36.94 | 42.27 | 46.91 | h | ----- | z | ----- | z | ----- | z | ----- | z | 43.23 | 36.53 | 33.19 | 37.40 | |||||||
| 1907 | 30.71 | 33.86 | 38.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.20 | k | 33.67 | 28.74 | 33.09 | ||||||
| 1908 | 26.94 | n | 30.90 | 37.65 | 39.83 | l | ----- | z | 55.05 | i | 59.13 | 56.61 | 51.07 | 35.58 | 29.97 | 28.03 | 41.12 | |||||||||
| 1909 | 30.71 | 28.07 | 29.61 | 37.97 | 41.68 | 52.07 | 60.45 | 56.84 | 49.10 | 37.48 | f | 30.27 | 23.23 | 40.00 | ||||||||||||
| 1910 | 26.35 | 25.54 | 34.77 | 35.87 | 46.00 | 53.73 | 57.87 | 58.03 | 53.10 | 39.77 | 29.73 | 24.84 | 40.47 | |||||||||||||
| 1911 | 28.74 | 26.39 | 35.29 | 36.23 | 42.16 | 50.13 | 55.42 | 53.61 | 52.40 | 36.74 | 28.60 | 17.61 | 38.61 | |||||||||||||
| 1912 | 23.00 | 20.59 | 32.39 | 32.07 | 41.97 | 49.30 | 53.77 | a | 52.77 | 44.37 | 36.70 | a | 23.57 | 17.81 | 35.69 | |||||||||||
| 1913 | 19.65 | 24.79 | 25.13 | 31.83 | 38.00 | 44.37 | 53.97 | 52.06 | 43.80 | 36.29 | 31.13 | 20.52 | 35.13 | |||||||||||||
| 1914 | 23.00 | 23.21 | 26.00 | 34.50 | 39.68 | 48.23 | 53.48 | 53.06 | 47.63 | 36.61 | 29.40 | 21.84 | 36.39 | |||||||||||||
| 1915 | 18.48 | 22.71 | 24.13 | 33.23 | ----- | z | ----- | z | 59.00 | ----- | z | 49.52 | a | 39.16 | 30.00 | 26.37 | a | 33.62 | ||||||||
| 1916 | 28.84 | 31.34 | 36.23 | 37.33 | 43.00 | 55.63 | c | 58.26 | 56.77 | 50.10 | 40.32 | 28.20 | 22.77 | 40.73 | ||||||||||||
| 1917 | 28.00 | 25.71 | 28.03 | 36.90 | 40.42 | 52.53 | 60.03 | 55.87 | 51.40 | 40.90 | 30.23 | 25.35 | 39.62 | |||||||||||||
| 1918 | 24.48 | 30.64 | 33.81 | 37.20 | 42.58 | 57.07 | 58.42 | 55.13 | 51.93 | 41.94 | 30.33 | 23.65 | 40.60 | |||||||||||||
| 1919 | 20.03 | 23.93 | 30.45 | 38.37 | 45.48 | 52.07 | 58.32 | 55.81 | 51.60 | 39.48 | 31.57 | 26.94 | 39.50 | |||||||||||||
| 1920 | 26.48 | 32.72 | 33.32 | 33.57 | i | 43.61 | 52.07 | 58.48 | 56.32 | 50.43 | 39.61 | 28.63 | 23.00 | 40.43 | ||||||||||||
| 1921 | 26.74 | 27.46 | 34.52 | 36.83 | 43.39 | 52.47 | 59.03 | 56.87 | 52.43 | 41.81 | 30.44 | e | 29.97 | 41.00 | ||||||||||||
| 1922 | 24.26 | 29.39 | 27.39 | 35.39 | g | 47.71 | n | 54.63 | 60.00 | 57.74 | 53.23 | 41.90 | 27.50 | 28.97 | 40.50 | |||||||||||
| 1923 | 27.61 | 26.46 | 29.42 | 38.70 | 45.55 | 50.33 | 58.84 | 56.29 | 48.93 | 37.39 | 32.70 | 25.81 | 39.84 | |||||||||||||
| 1924 | 21.16 | 26.45 | 29.35 | 35.50 | 46.19 | 56.20 | 59.42 | 58.16 | 50.70 | 40.00 | 31.20 | 27.06 | 40.12 | |||||||||||||
| 1925 | 20.39 | 28.54 | 30.81 | 39.23 | 46.29 | 54.10 | 59.48 | 55.61 | 50.83 | 42.42 | 28.07 | 23.52 | 39.94 | |||||||||||||
| 1926 | 20.16 | 28.36 | 32.77 | 38.10 | 43.06 | 52.73 | 56.13 | 56.90 | 54.83 | 42.03 | 31.67 | 27.06 | 40.32 | |||||||||||||
| 1927 | 27.25 | c | 33.68 | 31.16 | 37.03 | 44.35 | 53.10 | 58.77 | 55.97 | 52.23 | 39.16 | 34.30 | 24.94 | 41.00 | ||||||||||||
| 1928 | 24.45 | 27.52 | 33.65 | 37.90 | 46.94 | 57.17 | 58.00 | 56.45 | 50.10 | 44.42 | 30.50 | 22.71 | 40.82 | |||||||||||||
| 1929 | 22.00 | 27.11 | 30.26 | 34.83 | 44.64 | i | 53.10 | 60.55 | 56.03 | 52.70 | 40.90 | 25.10 | 24.16 | 38.79 | ||||||||||||
| 1930 | 27.13 | 27.46 | 30.68 | 41.48 | a | 40.94 | 54.90 | 58.77 | 56.48 | 49.20 | 38.65 | 30.40 | 21.35 | 39.79 | ||||||||||||
| 1931 | 21.52 | 28.96 | 30.45 | 38.43 | 44.52 | 61.13 | 71.90 | 66.39 | 66.17 | 36.82 | t | 30.37 | 24.00 | 43.99 | ||||||||||||
| 1932 | 20.68 | 32.66 | 31.48 | 35.70 | 43.77 | 50.60 | 60.19 | 59.13 | 51.10 | 40.55 | 28.27 | 24.81 | 39.91 | |||||||||||||
| 1933 | 24.29 | 23.04 | 31.13 | 36.70 | 42.03 | 53.93 | 59.84 | 57.77 | 55.33 | 44.97 | 31.80 | 26.19 | 40.59 | |||||||||||||
| 1934 | 21.87 | 30.71 | 35.13 | 41.47 | 50.81 | 53.23 | 59.87 | 58.94 | 51.90 | 41.81 | 33.27 | 28.65 | 42.30 | |||||||||||||
| 1935 | 28.13 | 28.21 | 32.29 | 38.87 | 41.71 | 54.30 | 60.23 | 57.81 | 50.37 | 41.45 | 30.70 | 25.42 | 40.79 | |||||||||||||
| 1936 | 24.58 | 29.66 | 34.52 | 39.13 | 46.23 | 54.87 | 59.94 | 58.58 | 51.67 | 40.61 | 31.53 | 24.68 | 41.33 | |||||||||||||
| 1937 | 20.77 | 27.86 | 31.19 | 38.13 | 46.27 | a | 51.90 | 57.94 | 58.87 | ----- | z | ----- | z | ----- | z | ----- | z | 41.62 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 24.38 | 28.01 | 31.83 | 37.21 | 43.72 | 53.07 | 58.85 | 56.79 | 51.32 | 40.16 | 30.31 | 24.94 | 39.75 | |||||||||||||
| S.D. | 3.51 | 3.34 | 3.50 | 2.53 | 2.72 | 3.15 | 3.15 | 2.58 | 3.80 | 2.43 | 2.52 | 3.33 | 1.80 | |||||||||||||
| SKEW | 0.13 | -0.14 | -0.21 | -0.20 | 0.27 | -0.20 | 1.99 | 1.40 | 1.69 | -0.13 | -0.25 | -0.03 | -1.46 | |||||||||||||
| MAX | 30.71 | 33.86 | 38.48 | 42.27 | 50.81 | 61.13 | 71.90 | 66.39 | 66.17 | 44.97 | 36.53 | 33.19 | 42.30 | |||||||||||||
| MIN | 18.48 | 20.59 | 24.13 | 31.83 | 38.00 | 44.37 | 53.48 | 52.06 | 43.80 | 35.58 | 23.57 | 17.61 | 35.13 | |||||||||||||
| NO YRS | 30 | 32 | 32 | 28 | 26 | 28 | 30 | 29 | 29 | 28 | 31 | 31 | 22 | |||||||||||||