| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1931 | 37.61 | 38.62 | 46.24 | 52.72 | 63.27 | 66.52 | 74.03 | 72.85 | 62.88 | 51.85 | 38.70 | 31.66 | 53.08 | |||||||||||||
| 1932 | 33.08 | 36.28 | 45.32 | 53.52 | 58.55 | 67.92 | 70.84 | 69.86 | b | 62.75 | 53.63 | 46.18 | 31.27 | 52.43 | ||||||||||||
| 1933 | 37.98 | 31.46 | 45.40 | 51.52 | 55.37 | 65.85 | 72.82 | 71.84 | 60.88 | 56.68 | 43.33 | 43.94 | 53.09 | |||||||||||||
| 1934 | 42.50 | 42.20 | 51.44 | 59.13 | 63.06 | 67.03 | 73.02 | 72.97 | 62.45 | 55.50 | 48.10 | 38.87 | 56.36 | |||||||||||||
| 1935 | 36.11 | 38.93 | 44.06 | 49.23 | 58.31 | 66.62 | 72.47 | 70.03 | 64.93 | 51.21 | 35.45 | 33.03 | 51.70 | |||||||||||||
| 1936 | 36.81 | 20.88 | 45.05 | 56.63 | 64.81 | 68.50 | 74.40 | 72.65 | 62.07 | 54.26 | 33.00 | 39.42 | 52.37 | |||||||||||||
| 1937 | 13.69 | 32.30 | 46.32 | 50.67 | 60.26 | 66.25 | 75.89 | 69.56 | 65.05 | 55.58 | 44.95 | 37.77 | 51.53 | |||||||||||||
| 1938 | 35.85 | 37.38 | 46.27 | 52.85 | 59.58 | 68.98 | 76.45 | 70.82 | 68.35 | 53.50 | 39.10 | 37.66 | 53.90 | |||||||||||||
| 1939 | 40.35 | 36.91 | 47.15 | 54.98 | 61.69 | 65.03 | 74.34 | 73.29 | 64.68 | 54.11 | 41.67 | 41.60 | 54.65 | |||||||||||||
| 1940 | 31.71 | 41.14 | 50.44 | 55.13 | 64.11 | 70.35 | 74.98 | 72.65 | 66.63 | 56.92 | 36.63 | 35.15 | 54.65 | |||||||||||||
| 1941 | 33.98 | 40.00 | 49.31 | 55.27 | 59.97 | 65.95 | 77.61 | 72.31 | 60.53 | 51.82 | 44.40 | 39.73 | 54.24 | |||||||||||||
| 1942 | 22.58 | 38.64 | 46.35 | 55.73 | 58.06 | 63.82 | 76.11 | 74.69 | 65.72 | ----- | z | 41.57 | 38.82 | 52.92 | ||||||||||||
| 1943 | 27.60 | 38.45 | 43.71 | 56.23 | 57.58 | 63.47 | 74.52 | 70.69 | 65.80 | 54.39 | 40.38 | 33.84 | 52.22 | |||||||||||||
| 1944 | 34.08 | 39.43 | 44.32 | 53.73 | 61.32 | 66.17 | 75.21 | 72.55 | 67.15 | 56.77 | 41.58 | 33.37 | 53.81 | |||||||||||||
| 1945 | 37.90 | 42.07 | 45.44 | 51.55 | 61.08 | 65.27 | 75.47 | 74.15 | a | 62.05 | 54.98 | 42.48 | 34.11 | 53.88 | ||||||||||||
| 1946 | 37.98 | 41.93 | 46.60 | 54.08 | 60.68 | 65.67 | 74.03 | 72.63 | 62.03 | 50.10 | 39.97 | 38.74 | 53.70 | |||||||||||||
| 1947 | 30.89 | 40.95 | 49.55 | 54.98 | 65.95 | 66.68 | 73.55 | 70.87 | 65.43 | 55.53 | 43.05 | 37.89 | 54.61 | |||||||||||||
| 1948 | 34.56 | 37.05 | 43.31 | 50.62 | 57.60 | ----- | z | 70.90 | 70.85 | 62.43 | 50.66 | 43.20 | 31.95 | 50.29 | ||||||||||||
| 1949 | 17.16 | 34.96 | 45.15 | 56.90 | 64.77 | 66.50 | 72.81 | 72.74 | 64.28 | 49.53 | 46.27 | 38.92 | 52.50 | |||||||||||||
| 1950 | 17.08 | 33.27 | 44.95 | a | 51.08 | 59.06 | 65.80 | 73.73 | 74.27 | 64.70 | 53.87 | 43.60 | 40.45 | 51.82 | ||||||||||||
| 1951 | 35.53 | 39.11 | 42.71 | 53.65 | 61.37 | 65.63 | 74.13 | 72.37 | 64.43 | 52.00 | 41.83 | 31.71 | 52.87 | |||||||||||||
| 1952 | 29.61 | 41.16 | 45.53 | 55.88 | 61.90 | 66.28 | 75.00 | 74.05 | a | 66.28 | 57.06 | 34.95 | 37.24 | 53.75 | ||||||||||||
| 1953 | 47.13 | 43.00 | 46.90 | 51.32 | 57.66 | 62.08 | 72.84 | 72.44 | 66.00 | 54.19 | 45.03 | 42.03 | 55.05 | |||||||||||||
| 1954 | 34.58 | 40.98 | 42.35 | 50.97 | 60.66 | 62.72 | 71.48 | 69.45 | 62.60 | 49.68 | 47.22 | 34.94 | 52.30 | |||||||||||||
| 1955 | 34.58 | 37.39 | 41.10 | 48.82 | 56.92 | 67.98 | 71.53 | 72.03 | 63.70 | 53.98 | 35.38 | 34.23 | 51.47 | |||||||||||||
| 1956 | 34.48 | 28.81 | 44.94 | 55.57 | 62.92 | 64.77 | 76.39 | 72.44 | 64.62 | 52.47 | 38.15 | 37.90 | 52.79 | |||||||||||||
| 1957 | 19.31 | 37.73 | 45.29 | 53.80 | 62.97 | 68.03 | 72.24 | 69.90 | 65.70 | 50.21 | 40.97 | a | 42.35 | 52.38 | ||||||||||||
| 1958 | 39.28 | a | 46.30 | 44.31 | 51.27 | 65.85 | 70.70 | 77.35 | a | 76.18 | 63.78 | 54.00 | 43.90 | 38.82 | 55.98 | |||||||||||
| 1959 | 36.61 | 40.20 | 47.05 | 53.98 | 57.13 | 67.42 | 74.58 | 70.56 | 62.08 | 54.02 | 38.27 | 35.16 | b | 53.09 | ||||||||||||
| 1960 | 25.97 | a | 39.47 | 45.61 | 53.77 | 58.24 | 68.00 | 79.03 | 71.15 | 64.45 | 54.97 | 43.82 | 30.81 | 52.94 | ||||||||||||
| 1961 | 38.21 | 47.29 | 48.23 | 52.82 | 60.16 | 72.42 | 77.47 | 77.74 | 61.07 | 51.89 | 36.13 | 37.44 | 55.07 | |||||||||||||
| 1962 | 32.97 | 39.34 | 43.47 | 55.78 | 56.87 | 65.98 | 73.52 | 71.45 | 65.20 | ----- | z | ----- | z | ----- | z | 56.06 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 32.74 | 38.24 | 45.75 | 53.57 | 60.55 | 66.59 | 74.34 | 72.25 | 64.09 | 53.51 | 41.27 | 36.80 | 53.39 | |||||||||||||
| S.D. | 7.70 | 5.00 | 2.29 | 2.41 | 2.85 | 2.22 | 2.03 | 1.88 | 1.94 | 2.22 | 3.91 | 3.59 | 1.30 | |||||||||||||
| SKEW | -0.93 | -1.34 | 0.53 | 0.00 | 0.23 | 0.42 | 0.28 | 0.81 | 0.00 | -0.20 | -0.32 | -0.01 | 0.46 | |||||||||||||
| MAX | 47.13 | 47.29 | 51.44 | 59.13 | 65.95 | 72.42 | 79.03 | 77.74 | 68.35 | 57.06 | 48.10 | 43.94 | 56.36 | |||||||||||||
| MIN | 13.69 | 20.88 | 41.10 | 48.82 | 55.37 | 62.08 | 70.84 | 69.45 | 60.53 | 49.53 | 33.00 | 30.81 | 51.47 | |||||||||||||
| NO YRS | 32 | 32 | 32 | 32 | 32 | 31 | 32 | 32 | 32 | 30 | 31 | 31 | 29 | |||||||||||||