| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | ----- | z | ----- | z | ----- | z | 80.18 | 76.32 | 67.23 | 55.00 | 50.93 | 38.00 | 61.28 | |||||||
| 1913 | 37.08 | 41.62 | 47.68 | 57.32 | 69.13 | 72.30 | 80.52 | 80.45 | 68.85 | 58.47 | 51.90 | 36.02 | 58.44 | |||||||||||||
| 1914 | 46.68 | l | 46.00 | z | 51.13 | 56.93 | 63.56 | 75.95 | 76.55 | 77.74 | 74.35 | 59.69 | 51.83 | a | 37.68 | 62.54 | ||||||||||
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.61 | ----- | z | ----- | z | ----- | z | 42.00 | z | 73.61 | ||
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.28 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 77.28 | ||
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.32 | a | 56.80 | ----- | z | 57.56 | ||
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.43 | ----- | z | ----- | z | ----- | z | 60.37 | 45.65 | ----- | z | 60.82 | ||||
| 1919 | ----- | z | ----- | z | ----- | z | 37.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.50 | 42.69 | 43.60 | |||
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | 63.90 | a | ----- | z | ----- | z | ----- | z | 72.30 | ----- | z | ----- | z | ----- | z | 68.10 | ||
| 1921 | 44.10 | 46.91 | 54.73 | 57.33 | 67.06 | 71.92 | 76.56 | 78.18 | 75.65 | 64.53 | 55.60 | 47.87 | 61.70 | |||||||||||||
| 1922 | 36.58 | 43.18 | 49.50 | 57.95 | 67.23 | 75.97 | 81.19 | 82.27 | 74.75 | 61.84 | 48.25 | 44.81 | 60.29 | |||||||||||||
| 1923 | 47.84 | 39.38 | 45.61 | 58.15 | 67.37 | 76.12 | 80.52 | 77.60 | 69.85 | 55.65 | 46.90 | 35.52 | 58.37 | |||||||||||||
| 1924 | 36.84 | 43.53 | 41.35 | 56.90 | 63.32 | 78.78 | 77.26 | 79.05 | 69.58 | 61.76 | 51.78 | a | 34.32 | 57.87 | ||||||||||||
| 1925 | 35.61 | 46.68 | 56.13 | 61.92 | 66.39 | 76.40 | 77.13 | 73.58 | 67.10 | 53.11 | c | 48.59 | b | 39.31 | 58.49 | |||||||||||
| 1926 | 39.05 | 48.21 | 44.84 | 52.85 | 63.06 | 75.18 | ----- | z | 82.37 | 73.38 | 61.19 | 49.43 | 39.85 | h | 58.96 | |||||||||||
| 1927 | 45.24 | 46.57 | 50.87 | 60.83 | 73.19 | 73.35 | 78.66 | 74.66 | 69.33 | 62.95 | 54.17 | 35.66 | 60.46 | |||||||||||||
| 1928 | 41.00 | 39.03 | 52.65 | 56.47 | 65.85 | 74.87 | 80.84 | 75.87 | 70.23 | 60.69 | 46.22 | 42.38 | a | 58.84 | ||||||||||||
| 1929 | 36.50 | 30.96 | 47.87 | 57.60 | 62.11 | 74.95 | 78.31 | 77.94 | 69.48 | 58.52 | 37.67 | 39.94 | 55.99 | |||||||||||||
| 1930 | 29.35 | a | 50.11 | 45.52 | 64.83 | 65.10 | 77.57 | 79.82 | 80.10 | 72.63 | 57.61 | 47.50 | 36.98 | 58.93 | ||||||||||||
| 1931 | 37.05 | 45.25 | 44.98 | 55.77 | 62.53 | 77.88 | 79.13 | 75.00 | 76.68 | 61.35 | 46.95 | 40.00 | 58.55 | |||||||||||||
| 1932 | 35.48 | 49.36 | 43.42 | 59.30 | 67.11 | 74.75 | 81.68 | 77.87 | 68.10 | 57.60 | 48.85 | 32.71 | 58.02 | |||||||||||||
| 1933 | 42.73 | 36.57 | 50.84 | 54.65 | 66.50 | 77.92 | 81.32 | 77.16 | 75.43 | 63.02 | 51.10 | 48.45 | 60.47 | |||||||||||||
| 1934 | 42.13 | 43.73 | 47.10 | 59.12 | 73.03 | 81.52 | 85.69 | 82.81 | 72.48 | 65.87 | a | 50.75 | 42.34 | 62.21 | ||||||||||||
| 1935 | 44.21 | 45.05 | 53.58 | 59.45 | 61.48 | 76.53 | 81.31 | 77.79 | 68.10 | 60.11 | 46.58 | 39.16 | 59.45 | |||||||||||||
| 1936 | 36.90 | 40.48 | 53.29 | 59.38 | 69.69 | 80.53 | 81.73 | 81.56 | 69.37 | 57.66 | 44.60 | 42.37 | 59.80 | |||||||||||||
| 1937 | 32.69 | 40.32 | 46.24 | 58.14 | b | 68.68 | a | 76.00 | 81.79 | 82.50 | 73.93 | 62.13 | 49.13 | 39.92 | 59.29 | |||||||||||
| 1938 | 41.24 | 45.29 | 54.45 | 58.73 | 66.66 | 74.62 | 78.90 | 81.87 | 71.57 | 65.58 | g | 45.10 | 41.90 | 60.03 | ||||||||||||
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.00 | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.00 | z | ----- | z | 9999.00 | |
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.00 | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | 33.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 39.03 | 43.28 | 49.09 | 58.18 | 66.33 | 76.22 | 79.95 | 78.47 | 71.38 | 59.88 | 48.78 | 39.91 | 59.25 | |||||||||||||
| S.D. | 4.64 | 4.74 | 4.22 | 2.57 | 3.24 | 2.33 | 2.22 | 2.95 | 2.92 | 3.11 | 4.09 | 4.15 | 1.50 | |||||||||||||
| SKEW | -0.01 | -0.83 | 0.00 | 0.48 | 0.54 | 0.31 | 0.41 | -0.04 | 0.22 | -0.23 | -0.35 | 0.37 | 0.08 | |||||||||||||
| MAX | 47.84 | 50.11 | 56.13 | 64.83 | 73.19 | 81.52 | 85.69 | 82.81 | 76.68 | 65.87 | 56.80 | 48.45 | 62.21 | |||||||||||||
| MIN | 29.35 | 30.96 | 41.35 | 52.85 | 61.48 | 71.92 | 76.55 | 73.58 | 67.10 | 53.11 | 37.67 | 32.71 | 55.99 | |||||||||||||
| NO YRS | 19 | 19 | 20 | 20 | 21 | 22 | 20 | 22 | 22 | 22 | 24 | 21 | 17 | |||||||||||||