| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1892 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1893 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1894 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1895 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1896 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1897 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1898 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1900 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1912 | ----- | z | ----- | z | ----- | z | 37.83 | 42.23 | 47.90 | 53.58 | 52.26 | 49.70 | 37.83 | b | 36.83 | 35.47 | a | 43.74 | ||||||||
| 1913 | 32.97 | a | 29.96 | 30.74 | 37.17 | 38.97 | 47.40 | 51.52 | b | 51.90 | 44.76 | a | 42.35 | 41.33 | 35.28 | b | 40.36 | |||||||||
| 1914 | 38.42 | 35.38 | b | 41.03 | 44.70 | 46.42 | 49.50 | 50.45 | 46.77 | 46.47 | 46.30 | a | 38.97 | 27.26 | 42.64 | |||||||||||
| 1915 | 32.13 | 34.57 | 39.81 | 39.97 | 43.65 | 43.93 | 51.68 | 53.35 | 46.37 | 42.84 | 40.00 | 36.03 | 42.03 | |||||||||||||
| 1916 | 27.81 | 37.24 | 37.13 | 39.60 | 41.32 | 46.33 | 48.97 | 50.29 | 48.27 | 35.65 | 32.87 | 32.84 | 39.86 | |||||||||||||
| 1917 | 30.58 | 32.57 | 32.29 | 39.17 | 42.84 | 44.87 | 50.10 | 49.84 | 49.37 | 39.17 | a | 39.17 | 42.48 | 41.04 | ||||||||||||
| 1918 | 39.65 | 34.86 | 37.84 | 39.23 | 41.77 | 49.77 | 51.26 | 52.10 | 50.13 | 45.71 | 38.47 | 34.10 | 42.91 | |||||||||||||
| 1919 | 33.68 | 36.36 | 37.03 | 40.63 | 42.65 | 45.77 | 50.94 | 51.06 | 47.80 | 38.68 | 39.25 | b | 29.13 | 41.08 | ||||||||||||
| 1920 | 34.58 | 31.55 | 36.84 | 39.07 | 39.39 | 47.30 | 51.45 | 52.03 | 49.83 | 45.26 | 37.70 | 37.35 | 41.86 | |||||||||||||
| 1921 | 34.81 | 38.18 | 39.19 | 39.60 | 43.35 | 51.10 | 48.55 | 50.90 | 44.30 | 44.39 | 43.20 | 32.00 | c | 42.46 | ||||||||||||
| 1922 | 29.81 | 32.71 | 35.74 | 37.60 | 44.13 | 48.63 | 50.70 | a | 51.32 | 47.93 | 45.81 | 35.73 | 34.35 | 41.21 | ||||||||||||
| 1923 | 37.35 | 31.75 | 35.84 | 41.03 | 45.10 | 48.10 | 53.73 | e | 52.69 | e | 48.43 | 43.52 | 39.03 | 33.58 | 42.51 | |||||||||||
| 1924 | 31.03 | 40.32 | j | 35.00 | d | 37.64 | b | 43.71 | g | 47.00 | 47.87 | 50.24 | f | 45.23 | d | 44.08 | f | 37.96 | c | 26.39 | 38.52 | |||||
| 1925 | 39.06 | 39.14 | 37.23 | 41.93 | 46.65 | 48.33 | 52.03 | 49.74 | 48.73 | 40.23 | 38.70 | 37.29 | 43.26 | |||||||||||||
| 1926 | 34.94 | 40.11 | 38.23 | 44.00 | 45.90 | 50.13 | 50.45 | 52.00 | 44.97 | 45.42 | 42.07 | 35.84 | 43.67 | |||||||||||||
| 1927 | 35.13 | 36.21 | 36.45 | 38.83 | 42.87 | 49.47 | 50.77 | 51.39 | 49.17 | 44.61 | 43.50 | 32.81 | 42.60 | |||||||||||||
| 1928 | 36.71 | 34.79 | 42.13 | 41.00 | 44.74 | 49.20 | 52.23 | 49.19 | 46.37 | 44.35 | 40.33 | 33.19 | 42.85 | |||||||||||||
| 1929 | 30.81 | 28.29 | 37.81 | 37.83 | 42.87 | 48.43 | 49.74 | 49.39 | 44.03 | 42.58 | 31.80 | 38.00 | 40.13 | |||||||||||||
| 1930 | 23.23 | 39.29 | 36.26 | 43.50 | 41.74 | 46.43 | 48.74 | 51.84 | 47.17 | 42.00 | 36.60 | 33.52 | 40.86 | |||||||||||||
| 1931 | 36.68 | 34.07 | 38.65 | 40.50 | 44.84 | 48.40 | 51.03 | 49.03 | 47.20 | 42.42 | 34.63 | 34.71 | 41.85 | |||||||||||||
| 1932 | 32.81 | 33.17 | 40.35 | 39.63 | 43.26 | 49.17 | 48.97 | 51.10 | 44.07 | 43.19 | 41.50 | 29.74 | 41.41 | |||||||||||||
| 1933 | 33.52 | 31.57 | 36.77 | 37.13 | 42.06 | 47.20 | 49.39 | 50.39 | 45.57 | 43.19 | 36.40 | 40.94 | 41.18 | |||||||||||||
| 1934 | 39.77 | 37.36 | 42.32 | 43.03 | 46.61 | 47.27 | 50.06 | 49.74 | 43.67 | 44.52 | 43.17 | 35.16 | 43.56 | |||||||||||||
| 1935 | 31.77 | 34.50 | 33.03 | 38.10 | 38.71 | 46.87 | 49.42 | 48.48 | 46.20 | 39.94 | 31.30 | 31.90 | 39.19 | |||||||||||||
| 1936 | 34.48 | 28.52 | 33.52 | 39.80 | 44.97 | 48.90 | 49.77 | 48.61 | 43.73 | 39.97 | 31.30 | 36.52 | 40.01 | |||||||||||||
| 1937 | 24.23 | 34.57 | 39.16 | 38.77 | 44.23 | 51.13 | 53.10 | 50.32 | 48.90 | 45.52 | 43.77 | 38.10 | 42.65 | |||||||||||||
| 1938 | 34.81 | 34.82 | 36.65 | 41.13 | 44.19 | 48.47 | 53.03 | 48.74 | 51.23 | 44.97 | 34.60 | 34.68 | 42.28 | |||||||||||||
| 1939 | 35.68 | 34.07 | 37.58 | 41.03 | 45.23 | 48.00 | 52.77 | 51.94 | 49.13 | 45.97 | 39.23 | 40.58 | 43.43 | |||||||||||||
| 1940 | 33.84 | 40.03 | 40.97 | 42.27 | 46.16 | 49.73 | 53.47 | a | 53.10 | 53.70 | 49.13 | 38.53 | 35.94 | 44.74 | ||||||||||||
| 1941 | 37.48 | 36.93 | 38.90 | 41.40 | 46.81 | 50.47 | 55.84 | 54.68 | 49.00 | 45.19 | 41.33 | 38.26 | 44.69 | |||||||||||||
| 1942 | 31.90 | 36.54 | 34.45 | 40.47 | 45.32 | 47.40 | 53.65 | 52.81 | 46.53 | 42.65 | 38.87 | 37.84 | 42.37 | |||||||||||||
| 1943 | 29.52 | 32.93 | 34.61 | 41.83 | 42.68 | 48.37 | 51.68 | 51.32 | 48.70 | 45.48 | 37.90 | 32.50 | a | 41.46 | ||||||||||||
| 1944 | 31.03 | 33.48 | 33.77 | 39.23 | 42.45 | 48.57 | 51.61 | 51.16 | 48.83 | 45.10 | 36.07 | 30.94 | 41.02 | |||||||||||||
| 1945 | 34.13 | 35.64 | 35.19 | 38.30 | 46.23 | 47.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 39.48 | |||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 33.46 | 34.72 | 37.05 | 40.09 | 43.65 | 48.15 | 51.17 | 50.92 | 47.44 | 43.25 | 38.25 | 34.69 | 41.97 | |||||||||||||
| S.D. | 3.91 | 3.03 | 2.78 | 1.97 | 2.19 | 1.62 | 1.82 | 1.68 | 2.38 | 2.89 | 3.43 | 3.66 | 1.36 | |||||||||||||
| SKEW | -0.66 | -0.17 | -0.09 | 0.51 | -0.51 | -0.36 | 0.36 | -0.20 | 0.25 | -0.70 | -0.40 | -0.18 | 0.05 | |||||||||||||
| MAX | 39.77 | 40.11 | 42.32 | 44.70 | 46.81 | 51.13 | 55.84 | 54.68 | 53.70 | 49.13 | 43.77 | 42.48 | 44.74 | |||||||||||||
| MIN | 23.23 | 28.29 | 30.74 | 37.13 | 38.71 | 43.93 | 47.87 | 46.77 | 43.67 | 35.65 | 31.30 | 26.39 | 39.19 | |||||||||||||
| NO YRS | 33 | 32 | 33 | 34 | 33 | 34 | 33 | 32 | 33 | 32 | 33 | 33 | 31 | |||||||||||||