| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.34 | l | 61.40 | a | 50.40 | g | 45.45 | 44.39 | 50.41 | |||
| 1951 | 37.89 | c | 41.88 | 40.61 | 52.20 | 55.47 | a | 62.48 | b | 65.50 | c | 64.27 | a | 61.73 | 52.26 | 43.53 | 36.13 | 51.16 | ||||||||
| 1952 | 35.06 | 41.43 | 44.05 | 50.91 | a | 55.70 | d | 58.19 | a | 67.55 | 69.00 | n | 64.33 | g | 58.85 | 40.17 | 40.55 | 49.25 | ||||||||
| 1953 | 45.60 | 43.05 | 45.47 | 48.88 | 54.44 | 57.77 | 65.00 | a | 65.50 | 61.98 | c | 54.27 | 48.18 | 43.03 | p | 53.65 | ||||||||||
| 1954 | 37.85 | 42.11 | f | 44.22 | b | ----- | z | ----- | z | 59.68 | h | 63.54 | d | 63.19 | b | 61.23 | 52.87 | d | 50.32 | 41.45 | 51.83 | |||||
| 1955 | 39.40 | 41.41 | e | 42.38 | f | 45.93 | 52.63 | 59.71 | d | 61.77 | c | 64.87 | 60.27 | 53.19 | 41.57 | c | 38.84 | 50.87 | ||||||||
| 1956 | 39.18 | 35.21 | 44.00 | 52.67 | 59.89 | 57.65 | 67.73 | 65.34 | 60.90 | 51.42 | 42.50 | 38.85 | 51.28 | |||||||||||||
| 1957 | 30.45 | 41.62 | 45.95 | 52.35 | 59.05 | 60.53 | 63.68 | 63.05 | 66.02 | 52.68 | 43.10 | 42.97 | a | 51.79 | ||||||||||||
| 1958 | 42.74 | 48.16 | 44.69 | 49.65 | 60.66 | 65.37 | 70.06 | 69.47 | 61.91 | a | 55.26 | 44.33 | 43.61 | 54.66 | ||||||||||||
| 1959 | 39.90 | 41.05 | 45.42 | 50.50 | 54.42 | 60.72 | 66.81 | 63.94 | 58.68 | 53.65 | 44.12 | 39.69 | 51.57 | |||||||||||||
| 1960 | 35.06 | 41.31 | 44.56 | 49.32 | 53.11 | 61.73 | 67.35 | 64.18 | 62.23 | 53.79 | 44.59 | c | 38.08 | 51.28 | ||||||||||||
| 1961 | 42.87 | 45.14 | 46.11 | 48.78 | 55.74 | 64.72 | 68.44 | 71.52 | 58.73 | 52.40 | 41.80 | 39.16 | 52.95 | |||||||||||||
| 1962 | 36.16 | 41.45 | 43.29 | 50.65 | 51.73 | 59.31 | a | 64.89 | 64.31 | 62.38 | 53.40 | 45.38 | 41.37 | 51.19 | ||||||||||||
| 1963 | 33.35 | 46.27 | 44.87 | 47.90 | 55.66 | 59.45 | 61.89 | 65.69 | 64.38 | 53.44 | 45.50 | 39.37 | 51.48 | |||||||||||||
| 1964 | 40.89 | 41.38 | 43.57 | a | 47.43 | 53.44 | 58.95 | 65.31 | 63.61 | 59.93 | 53.18 | 41.75 | 36.66 | 50.51 | ||||||||||||
| 1965 | 39.79 | 42.45 | 46.27 | 50.58 | 52.40 | 59.93 | 67.95 | 67.60 | 59.37 | 54.65 | 47.13 | 37.79 | 52.16 | |||||||||||||
| 1966 | 38.56 | 40.93 | 45.07 | d | 50.98 | 56.24 | 60.27 | 64.84 | 66.58 | 64.37 | 52.62 | c | 45.67 | 43.03 | 52.43 | |||||||||||
| 1967 | 42.62 | c | 43.54 | 43.27 | 46.02 | 56.21 | 64.98 | 67.50 | 72.61 | 66.12 | 53.69 | 46.57 | 40.11 | 53.60 | ||||||||||||
| 1968 | 38.95 | 47.50 | 47.98 | 47.97 | 56.31 | 60.78 | 67.19 | 64.57 | a | 61.58 | 50.77 | 44.98 | 36.82 | 52.12 | ||||||||||||
| 1969 | 30.73 | 39.09 | 46.10 | 49.77 | 58.97 | 66.00 | 65.90 | 64.27 | 62.48 | 51.18 | 45.93 | 40.89 | 51.78 | |||||||||||||
| 1970 | 39.63 | 45.00 | 45.95 | 46.70 | 56.05 | 64.80 | 68.56 | 68.26 | 58.90 | 51.32 | 45.12 | 38.87 | 52.43 | |||||||||||||
| 1971 | 39.44 | 41.68 | 42.71 | 48.50 | 56.92 | 56.93 | 67.32 | 69.47 | 58.83 | 50.89 | 44.33 | 37.79 | 51.23 | |||||||||||||
| 1972 | 37.10 | 41.28 | 47.76 | 46.45 | 58.89 | 61.70 | 68.73 | 69.97 | a | 58.93 | 52.29 | 46.23 | 35.52 | 52.07 | ||||||||||||
| 1973 | 37.55 | 43.46 | 45.52 | 50.50 | 57.21 | 61.53 | 67.84 | 63.87 | 63.85 | 52.31 | 42.67 | 43.34 | 52.47 | |||||||||||||
| 1974 | 36.26 | 42.04 | 46.45 | 50.43 | 53.29 | 63.08 | 65.02 | 66.69 | 66.45 | 54.69 | 47.03 | 42.74 | 52.85 | |||||||||||||
| 1975 | 40.50 | 40.62 | 44.31 | 46.97 | 56.53 | 60.13 | 67.18 | 64.13 | 64.68 | 52.19 | 43.87 | 41.60 | 51.89 | |||||||||||||
| 1976 | 40.76 | 40.95 | 44.00 | 49.25 | 56.69 | 58.85 | 65.02 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.79 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.40 | 42.32 | 44.89 | 49.25 | 55.91 | 61.02 | 66.25 | 66.12 | 61.89 | 53.09 | 44.69 | 39.99 | 52.04 | |||||||||||||
| S.D. | 3.55 | 2.67 | 1.60 | 1.97 | 2.39 | 2.59 | 2.09 | 2.74 | 2.43 | 1.70 | 2.25 | 2.51 | 0.94 | |||||||||||||
| SKEW | -0.46 | 0.08 | -0.39 | -0.08 | 0.14 | 0.46 | -0.47 | 0.96 | 0.37 | 1.47 | 0.24 | 0.02 | 1.14 | |||||||||||||
| MAX | 45.60 | 48.16 | 47.98 | 52.67 | 60.66 | 66.00 | 70.06 | 72.61 | 66.45 | 58.85 | 50.32 | 44.39 | 54.66 | |||||||||||||
| MIN | 30.45 | 35.21 | 40.61 | 45.93 | 51.73 | 56.93 | 61.77 | 63.05 | 58.68 | 50.77 | 40.17 | 35.52 | 50.51 | |||||||||||||
| NO YRS | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 24 | 25 | 25 | 26 | 25 | 21 | |||||||||||||