| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1894 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.23 | 52.37 | 48.30 | 36.75 | a | 49.41 | ||||
| 1895 | 33.13 | 41.98 | 44.89 | 52.60 | 58.02 | 64.65 | 68.52 | a | 67.76 | 57.43 | 55.98 | 43.60 | 38.69 | 52.27 | ||||||||||||
| 1896 | 37.69 | 44.86 | 44.69 | 48.25 | 54.84 | 63.28 | 71.71 | 67.19 | 61.45 | 56.32 | 37.28 | a | 39.76 | 52.28 | ||||||||||||
| 1897 | 36.53 | 41.46 | 40.94 | 54.63 | 62.45 | 63.77 | ----- | z | 71.90 | 60.48 | 54.00 | 43.07 | 37.24 | 51.50 | ||||||||||||
| 1898 | 37.76 | 43.16 | 44.10 | 52.62 | 57.79 | 63.32 | 67.32 | 69.11 | 62.52 | 51.89 | 42.23 | 34.26 | 52.17 | |||||||||||||
| 1899 | 35.85 | 35.41 | 43.97 | 49.92 | 53.00 | 60.08 | 68.44 | 62.26 | 63.27 | 51.63 | 49.32 | 40.56 | 51.14 | |||||||||||||
| 1900 | 41.74 | 39.07 | 51.24 | 53.57 | 57.61 | 64.05 | 67.39 | 64.79 | 59.75 | 52.55 | 45.58 | 45.97 | 53.61 | |||||||||||||
| 1901 | 39.86 | b | 42.29 | 48.73 | 52.33 | 60.02 | 61.85 | 68.08 | 72.56 | 61.93 | 62.02 | 49.53 | 43.20 | a | 55.20 | |||||||||||
| 1902 | 37.77 | 39.25 | 43.89 | 49.35 | 57.18 | 60.77 | 64.98 | 67.13 | 61.60 | 55.76 | 43.90 | a | 35.05 | 51.39 | ||||||||||||
| 1903 | 39.15 | 36.55 | 44.34 | 48.93 | 58.19 | 64.30 | 64.98 | 66.69 | 60.77 | 54.53 | 42.83 | 37.29 | 51.55 | |||||||||||||
| 1904 | 40.47 | 37.40 | 41.11 | 53.37 | 56.88 | f | 63.55 | 68.24 | 70.80 | k | 65.38 | r | 55.88 | c | 49.20 | 39.95 | a | 49.91 | ||||||||
| 1905 | 36.84 | 37.12 | 50.19 | 55.18 | 54.79 | l | 63.02 | b | 70.52 | 68.12 | a | 63.24 | c | 46.73 | 42.87 | 36.31 | 51.83 | |||||||||
| 1906 | 39.42 | 41.75 | 43.68 | 55.20 | 57.58 | 60.83 | 74.09 | b | 69.96 | c | 62.02 | 54.68 | 45.41 | a | 39.63 | 53.69 | ||||||||||
| 1907 | 29.11 | c | 39.46 | a | 43.16 | 50.50 | a | 59.35 | 62.11 | h | 68.17 | a | 65.17 | a | 63.09 | c | 57.45 | b | 46.84 | e | 38.89 | h | 52.23 | |||
| 1908 | 38.36 | f | 39.21 | c | 45.55 | l | 51.72 | g | 52.52 | g | 59.77 | f | 69.04 | h | 66.50 | 58.88 | e | 52.45 | a | 45.77 | 36.35 | 49.86 | ||||
| 1909 | 27.23 | 39.82 | 46.05 | 49.65 | 55.05 | a | 61.60 | 63.94 | 64.39 | 62.27 | 53.52 | 44.08 | 31.39 | 49.91 | ||||||||||||
| 1910 | 32.06 | 35.46 | 50.42 | 53.37 | 58.08 | 60.18 | 67.31 | 64.15 | 60.40 | 55.23 | 43.68 | 40.06 | 51.70 | |||||||||||||
| 1911 | 34.81 | 37.64 | 46.66 | 48.70 | 53.47 | 59.77 | 69.34 | 66.65 | 57.95 | 52.73 | 43.33 | 39.03 | 50.84 | |||||||||||||
| 1912 | 33.79 | 42.05 | 43.85 | 49.38 | 57.42 | 62.17 | 66.03 | 65.18 | 60.55 | 49.35 | 44.92 | 39.40 | f | 52.25 | ||||||||||||
| 1913 | 34.34 | 35.70 | 42.45 | 50.78 | 55.94 | 61.88 | 66.79 | 68.37 | 61.85 | 51.76 | 44.45 | 36.08 | 50.87 | |||||||||||||
| 1914 | 40.48 | 40.14 | 48.61 | 52.57 | 59.53 | 60.63 | 67.73 | 67.63 | 58.37 | 54.05 | 44.08 | 31.52 | 52.11 | |||||||||||||
| 1915 | 33.56 | 40.77 | 50.42 | 53.27 | d | 55.71 | 61.48 | 66.02 | 70.24 | 62.32 | 54.24 | 42.32 | 38.77 | 52.43 | ||||||||||||
| 1916 | 24.18 | 35.52 | 43.87 | 51.80 | 53.18 | 60.55 | 63.61 | 67.10 | 62.10 | 53.00 | 40.23 | 35.81 | 49.25 | |||||||||||||
| 1917 | 36.79 | 39.20 | 40.42 | 47.70 | 53.89 | 60.82 | 69.03 | 70.56 | 63.23 | 57.06 | 47.83 | 46.26 | 52.73 | |||||||||||||
| 1918 | 43.02 | 38.32 | 45.27 | 52.37 | 54.97 | 66.00 | 67.68 | 67.23 | 67.83 | 56.44 | 44.92 | 39.73 | 53.65 | |||||||||||||
| 1919 | 37.63 | 39.84 | 46.29 | 52.52 | 57.27 | 61.03 | 69.37 | 69.87 | 62.27 | 50.15 | 43.08 | 26.87 | 51.35 | |||||||||||||
| 1920 | 35.27 | 40.83 | 44.77 | 48.05 | 54.85 | 62.20 | 68.47 | 69.02 | 60.28 | 52.74 | 43.58 | 40.32 | 51.70 | |||||||||||||
| 1921 | 37.61 | 40.98 | 46.15 | 49.57 | 55.98 | 64.02 | 65.84 | 67.47 | 58.45 | 55.03 | 43.50 | 34.73 | 51.61 | |||||||||||||
| 1922 | 29.42 | 34.41 | 41.82 | 48.57 | 57.42 | 65.25 | 68.60 | 67.58 | 63.55 | 54.87 | 42.10 | 31.48 | 50.42 | |||||||||||||
| 1923 | 40.11 | 34.30 | 45.03 | 52.87 | 56.44 | 61.95 | h | 67.56 | 69.52 | 63.72 | 54.24 | 47.72 | 38.73 | 51.84 | ||||||||||||
| 1924 | 33.81 | 44.93 | 44.82 | 52.62 | 59.85 | 63.37 | 67.89 | 66.85 | 62.28 | 52.48 | 42.02 | 30.90 | 51.82 | |||||||||||||
| 1925 | 40.84 | 44.20 | 46.37 | 53.03 | 60.27 | 64.92 | 70.05 | 66.77 | 62.68 | 53.94 | 42.92 | 42.21 | 54.02 | |||||||||||||
| 1926 | 39.26 | 45.29 | d | 51.71 | 58.55 | 57.82 | 66.78 | 70.65 | 68.06 | 59.19 | a | 55.52 | 46.77 | 36.40 | 54.67 | |||||||||||
| 1927 | 33.79 | 41.96 | 44.73 | 50.78 | 55.11 | 64.03 | 68.24 | 68.95 | 60.88 | 54.27 | 47.65 | 35.32 | 52.14 | |||||||||||||
| 1928 | 33.23 | 40.28 | 48.05 | 50.65 | 60.55 | 61.68 | 68.39 | 67.26 | 61.10 | 53.19 | 44.57 | 35.52 | 52.04 | |||||||||||||
| 1929 | 29.58 | 30.02 | 46.69 | 48.35 | 57.02 | 61.50 | 67.82 | 69.68 | 62.52 | 56.52 | 41.94 | c | 41.55 | 51.10 | ||||||||||||
| 1930 | 22.22 | a | 43.07 | 48.05 | 54.92 | 56.45 | 62.22 | 68.58 | 69.58 | 62.98 | 51.21 | 43.57 | 36.57 | b | 51.62 | |||||||||||
| 1931 | 39.03 | 41.48 | 46.19 | 53.37 | 61.18 | 62.78 | 68.87 | 69.44 | 61.03 | 54.08 | 41.78 | 33.10 | 52.69 | |||||||||||||
| 1932 | 35.94 | 37.45 | 45.26 | 52.83 | 57.47 | 65.50 | a | 66.39 | 67.72 | a | 64.57 | a | 55.47 | 46.65 | 34.18 | 52.45 | ||||||||||
| 1933 | 37.63 | 33.80 | 44.98 | 52.65 | 54.05 | 62.13 | 67.84 | 68.90 | 58.05 | 55.16 | 45.42 | 43.73 | 52.03 | |||||||||||||
| 1934 | 43.95 | 46.62 | 53.02 | 59.10 | 60.52 | 63.85 | 67.50 | 70.44 | 62.65 | 56.23 | 48.02 | 41.47 | 56.11 | |||||||||||||
| 1935 | 35.92 | 41.91 | 43.63 | 50.90 | 57.82 | 64.45 | 68.29 | 68.92 | 66.20 | 52.68 | 39.75 | 37.23 | 52.31 | |||||||||||||
| 1936 | 40.34 | 28.33 | b | 44.69 | 55.72 | 60.19 | 64.13 | 67.66 | 69.81 | 62.12 | 57.79 | 42.05 | 42.53 | 52.95 | ||||||||||||
| 1937 | 25.68 | 35.68 | 47.27 | 49.62 | 58.32 | 64.13 | 68.05 | a | 67.18 | 63.00 | 58.47 | 47.82 | 41.06 | 52.19 | ||||||||||||
| 1938 | 38.81 | 38.16 | 45.18 | 54.00 | 58.94 | 64.52 | 71.69 | 66.89 | 66.05 | 55.40 | 41.82 | 40.58 | 53.50 | |||||||||||||
| 1939 | 41.44 | 38.50 | 46.89 | 55.00 | 59.78 | a | 61.82 | 69.26 | 70.19 | 64.75 | f | 55.35 | 47.05 | 43.16 | 53.49 | |||||||||||
| 1940 | 37.18 | 43.10 | 49.53 | 53.85 | 61.87 | 66.75 | 68.71 | 70.16 | 64.82 | 57.15 | 41.73 | 39.00 | a | 54.49 | ||||||||||||
| 1941 | 37.47 | 43.59 | 51.85 | 54.88 | 58.50 | 63.10 | 71.66 | 67.68 | 60.32 | 53.84 | 46.55 | 40.55 | 54.17 | |||||||||||||
| 1942 | 29.95 | 40.80 | 46.15 | 53.70 | 56.27 | 61.12 | 69.42 | 69.58 | 64.22 | 56.00 | 42.78 | 40.18 | 52.51 | |||||||||||||
| 1943 | 30.89 | 40.66 | 43.92 | 53.98 | 55.06 | 60.52 | 67.35 | 65.16 | 66.02 | 54.79 | 44.65 | 37.94 | 51.75 | |||||||||||||
| 1944 | 36.26 | 41.24 | 44.98 | 51.08 | 57.32 | 61.52 | 68.71 | 67.90 | 64.47 | 58.39 | 43.95 | 36.52 | a | 52.69 | ||||||||||||
| 1945 | 41.63 | 42.36 | 43.71 | 49.72 | 58.32 | 62.00 | 69.58 | 68.06 | 60.75 | 54.34 | 43.03 | 36.82 | 52.53 | |||||||||||||
| 1946 | 39.73 | 40.80 | 45.69 | 50.60 | 59.45 | 59.98 | 67.71 | 67.69 | 61.82 | 50.08 | 42.55 | 41.37 | 52.29 | |||||||||||||
| 1947 | 35.94 | 43.79 | 48.81 | 53.33 | 61.06 | 60.90 | 66.58 | 65.74 | 63.15 | 54.58 | 46.15 | 41.31 | 53.44 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.30 | a | 65.34 | 60.52 | 53.16 | 43.42 | 35.63 | 53.89 | ||||||
| 1949 | 24.77 | c | 38.50 | j | 44.76 | 53.25 | 59.31 | 61.63 | 66.05 | 67.16 | 63.65 | 49.13 | 49.38 | 40.27 | 52.67 | |||||||||||
| 1950 | 23.55 | 33.14 | 42.85 | 49.03 | 55.24 | 62.33 | 66.92 | 69.45 | 62.35 | 52.03 | 44.32 | 42.60 | 50.32 | |||||||||||||
| 1951 | 37.16 | 39.66 | 41.44 | 54.03 | 56.65 | 64.25 | 68.16 | 66.22 | a | 63.97 | 53.29 | 43.92 | 36.57 | a | 52.11 | |||||||||||
| 1952 | 31.63 | 39.14 | 43.76 | 52.38 | 56.90 | 60.20 | 68.63 | 67.50 | 64.65 | 59.85 | 40.40 | 37.61 | 51.89 | |||||||||||||
| 1953 | 45.77 | 43.34 | 45.45 | 49.83 | 54.77 | 58.28 | 66.94 | 66.71 | 63.00 | 55.31 | 46.60 | 42.84 | 53.24 | |||||||||||||
| 1954 | 35.06 | 39.54 | a | 42.59 | d | 49.97 | 56.98 | 56.89 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.83 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.59 | 39.60 | 45.69 | 52.06 | 57.47 | 62.57 | 68.05 | 67.85 | 62.08 | 54.31 | 44.41 | 38.22 | 52.35 | |||||||||||||
| S.D. | 5.23 | 3.68 | 2.87 | 2.51 | 2.28 | 1.88 | 1.88 | 1.96 | 2.16 | 2.62 | 2.59 | 3.82 | 1.32 | |||||||||||||
| SKEW | -0.73 | -0.75 | 0.63 | 0.39 | 0.03 | 0.22 | 0.37 | -0.19 | 0.06 | -0.03 | 0.07 | -0.40 | 0.37 | |||||||||||||
| MAX | 45.77 | 46.62 | 53.02 | 59.10 | 62.45 | 66.78 | 74.09 | 72.56 | 67.83 | 62.02 | 49.53 | 46.26 | 56.11 | |||||||||||||
| MIN | 22.22 | 28.33 | 40.42 | 47.70 | 53.00 | 58.28 | 63.61 | 62.26 | 57.43 | 46.73 | 37.28 | 26.87 | 49.25 | |||||||||||||
| NO YRS | 58 | 58 | 58 | 58 | 56 | 55 | 57 | 58 | 58 | 60 | 60 | 58 | 49 | |||||||||||||