| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1932 | 41.69 | o | 43.10 | 48.81 | 49.08 | 51.89 | 57.32 | 57.44 | 60.73 | 57.63 | 53.16 | 49.67 | 40.10 | 51.72 | ||||||||||||
| 1933 | 40.81 | 40.54 | 45.32 | 47.07 | 48.79 | 54.98 | 57.66 | 59.65 | 55.08 | 53.53 | 46.57 | 46.94 | 49.74 | |||||||||||||
| 1934 | 46.45 | 45.43 | 49.61 | 49.27 | 55.05 | 56.02 | 58.06 | 60.74 | 59.88 | 57.06 | 51.48 | 46.08 | 52.93 | |||||||||||||
| 1935 | 43.23 | 47.96 | 41.82 | a | 49.32 | 50.60 | 57.60 | 58.15 | 59.82 | 59.93 | 52.24 | 44.80 | 45.73 | e | 50.93 | |||||||||||
| 1936 | 43.53 | b | 43.02 | 45.53 | 51.25 | 54.98 | 59.43 | 59.92 | 61.35 | 58.38 | 56.31 | 46.95 | 44.45 | a | 52.09 | |||||||||||
| 1937 | 35.61 | 43.48 | 48.76 | 46.70 | 51.61 | 58.32 | 60.34 | 61.79 | 58.67 | 56.94 | 51.10 | 46.94 | 51.69 | |||||||||||||
| 1938 | 45.65 | 45.29 | 46.31 | 50.48 | 53.53 | 57.27 | 60.18 | a | 58.05 | 61.15 | 55.00 | 45.28 | 45.73 | 51.99 | ||||||||||||
| 1939 | 43.74 | 42.02 | 46.63 | 51.28 | a | 54.02 | a | 55.43 | 60.88 | a | 61.08 | 60.43 | 54.85 | 51.22 | 48.45 | 52.50 | ||||||||||
| 1940 | 46.11 | 47.64 | 49.89 | 51.68 | 55.18 | a | 58.58 | 61.11 | 62.58 | 62.08 | 58.16 | 47.63 | c | 46.62 | b | 53.94 | ||||||||||
| 1941 | 47.45 | 49.16 | 51.65 | 50.22 | 55.24 | 58.29 | b | 62.77 | 61.92 | 59.07 | 55.08 | 51.17 | 45.53 | a | 53.96 | |||||||||||
| 1942 | 45.02 | 44.93 | 45.35 | 50.21 | a | 52.55 | 56.60 | 62.66 | 62.28 | a | 58.83 | 55.95 | 48.37 | 46.32 | 52.42 | |||||||||||
| 1943 | 40.98 | 48.41 | 47.00 | 50.43 | a | 51.45 | 55.98 | 59.37 | 59.92 | 60.83 | 54.23 | 49.68 | 43.69 | 51.83 | ||||||||||||
| 1944 | 43.19 | 43.17 | 44.94 | 48.07 | 52.19 | 55.72 | 60.45 | 60.71 | 59.80 | 57.06 | 46.85 | 44.44 | 51.38 | |||||||||||||
| 1945 | 45.39 | h | 45.98 | 44.90 | 47.82 | 54.19 | 57.70 | 60.63 | 60.10 | 58.55 | 54.55 | ----- | z | 44.85 | 52.93 | |||||||||||
| 1946 | 43.53 | 44.27 | 46.24 | 48.72 | 54.00 | 56.23 | 60.47 | 59.68 | 58.13 | 49.81 | 45.25 | 44.37 | 50.89 | |||||||||||||
| 1947 | 40.52 | 47.45 | 49.06 | 53.00 | 54.55 | 56.93 | 60.27 | 59.71 | 59.12 | 54.32 | 48.63 | 44.68 | 52.35 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.81 | 60.56 | 58.08 | 51.89 | 44.84 | a | 39.26 | 52.24 | ||||||
| 1949 | 33.77 | a | 42.68 | 46.16 | 50.25 | 54.77 | a | 57.65 | 59.76 | 60.77 | 58.90 | a | 49.47 | 52.17 | a | 43.00 | 50.78 | |||||||||
| 1950 | 36.53 | 44.91 | 45.45 | 47.97 | 50.69 | b | 57.63 | 60.95 | b | 62.27 | 58.52 | a | 54.23 | a | 50.07 | a | 50.56 | 51.65 | ||||||||
| 1951 | 42.44 | 45.24 | a | 43.37 | a | 49.48 | 53.10 | 57.37 | 59.76 | 59.11 | 56.08 | 53.95 | b | 49.71 | b | 41.95 | 50.96 | |||||||||
| 1952 | 41.81 | 45.74 | 43.81 | 48.80 | 53.00 | 55.33 | 59.90 | 60.37 | 59.42 | 56.58 | 44.10 | 44.74 | 51.13 | |||||||||||||
| 1953 | 48.73 | 45.16 | 44.87 | 48.50 | 52.08 | 53.85 | 60.06 | 61.35 | 60.90 | 55.32 | 50.68 | 46.16 | 52.31 | |||||||||||||
| 1954 | 44.18 | 47.93 | 44.69 | 48.67 | 53.97 | 55.40 | 58.19 | d | 60.26 | 58.57 | 53.58 | 51.72 | 44.79 | 51.83 | ||||||||||||
| 1955 | 42.82 | 42.09 | 44.06 | 44.93 | 50.29 | 55.76 | a | 58.10 | 59.48 | 58.32 | 54.37 | 47.42 | 45.63 | a | 50.27 | |||||||||||
| 1956 | 44.11 | 40.62 | 44.76 | 49.38 | 55.56 | 55.79 | b | 61.61 | 61.90 | 59.43 | 52.97 | 46.45 | 44.52 | 51.43 | ||||||||||||
| 1957 | 38.53 | 47.00 | 46.84 | 50.72 | 55.06 | 59.48 | 60.53 | 60.31 | 63.52 | 54.68 | 46.85 | 46.76 | 52.52 | |||||||||||||
| 1958 | 47.13 | 50.89 | 45.13 | 50.65 | 56.84 | 61.64 | a | 64.61 | 65.05 | 61.86 | b | 57.00 | 50.12 | 49.53 | 55.04 | |||||||||||
| 1959 | 47.53 | 44.39 | 47.76 | 51.40 | 53.60 | 58.70 | 61.35 | 61.24 | 58.53 | 56.53 | 49.85 | 45.56 | 53.04 | |||||||||||||
| 1960 | 43.18 | 45.78 | 48.10 | 50.90 | 52.27 | 58.87 | 59.82 | 60.84 | 59.90 | 55.31 | 48.73 | 45.50 | 52.43 | |||||||||||||
| 1961 | 48.27 | a | 47.98 | 47.71 | 49.35 | 52.81 | 59.92 | 62.63 | 63.40 | 58.42 | 54.32 | 45.75 | 44.56 | 52.93 | ||||||||||||
| 1962 | 42.03 | 46.05 | 45.85 | 51.10 | 50.69 | 56.18 | 59.90 | 63.40 | 61.40 | 55.48 | 50.30 | 46.97 | 52.45 | |||||||||||||
| 1963 | 39.92 | 52.86 | 46.18 | 47.53 | 52.92 | 58.13 | 59.92 | 62.79 | 63.88 | ----- | z | 49.30 | 46.15 | a | 52.69 | |||||||||||
| 1964 | 44.39 | 44.34 | 45.13 | 47.22 | 50.95 | 57.32 | 60.82 | 61.97 | 58.93 | 56.47 | 46.12 | 43.95 | 51.47 | |||||||||||||
| 1965 | 44.06 | 45.68 | 47.87 | 50.53 | 51.27 | 56.35 | 61.63 | 63.90 | 59.37 | 57.73 | 50.73 | 41.84 | 52.58 | |||||||||||||
| 1966 | 45.21 | 44.46 | 46.44 | 50.45 | 51.94 | 61.50 | a | 61.40 | 63.05 | 62.87 | 54.80 | a | 49.68 | 46.19 | 53.17 | |||||||||||
| 1967 | 45.44 | 45.39 | 44.39 | 45.50 | 54.71 | 59.97 | 63.05 | 65.60 | 65.47 | 56.77 | 50.28 | 43.27 | 53.32 | |||||||||||||
| 1968 | 43.65 | 51.53 | 49.92 | 48.68 | 52.13 | 57.50 | 60.73 | 61.23 | 59.68 | 52.66 | 49.22 | 42.50 | 52.45 | |||||||||||||
| 1969 | 39.08 | 41.29 | 46.50 | 48.07 | 54.60 | 59.08 | 58.56 | 58.58 | 58.97 | 53.19 | 47.63 | 46.31 | 50.99 | |||||||||||||
| 1970 | 45.90 | 48.32 | 47.45 | 45.33 | 51.95 | 56.80 | 59.45 | 58.19 | 56.23 | b | 51.69 | 48.48 | ----- | z | 51.80 | |||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 43.18 | 45.58 | 46.43 | 49.21 | 53.03 | 57.44 | 60.31 | 61.17 | 59.61 | 54.66 | 48.55 | 45.12 | 52.10 | |||||||||||||
| S.D. | 3.47 | 2.87 | 2.06 | 1.85 | 1.79 | 1.76 | 1.57 | 1.72 | 2.08 | 2.03 | 2.22 | 2.24 | 1.11 | |||||||||||||
| SKEW | -0.81 | 0.45 | 0.38 | -0.47 | -0.12 | 0.45 | 0.35 | 0.53 | 0.62 | -0.59 | -0.33 | -0.28 | 0.27 | |||||||||||||
| MAX | 48.73 | 52.86 | 51.65 | 53.00 | 56.84 | 61.64 | 64.61 | 65.60 | 65.47 | 58.16 | 52.17 | 50.56 | 55.04 | |||||||||||||
| MIN | 33.77 | 40.54 | 41.82 | 44.93 | 48.79 | 53.85 | 57.44 | 58.05 | 55.08 | 49.47 | 44.10 | 39.26 | 49.74 | |||||||||||||
| NO YRS | 36 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 38 | 38 | 38 | 34 | |||||||||||||