| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1942 | ----- | z | ----- | z | ----- | z | ----- | 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 | |
| 1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.00 | b | 52.81 | 41.93 | 32.61 | 46.34 | ||||
| 1960 | 31.61 | 36.02 | 44.27 | 45.92 | 49.90 | 64.37 | 71.42 | 64.31 | e | 62.83 | 52.24 | 39.82 | 35.87 | 49.88 | ||||||||||||
| 1961 | 37.62 | a | 39.93 | 40.89 | 47.05 | 51.13 | 66.09 | a | 69.26 | 70.83 | d | 57.67 | 50.83 | a | 38.42 | 32.52 | a | 50.19 | ||||||||
| 1962 | 27.27 | 35.54 | 38.88 | a | 50.08 | 48.67 | a | 59.70 | b | 66.90 | b | 65.52 | 63.58 | 50.48 | 42.88 | 35.35 | 48.74 | |||||||||
| 1963 | 31.37 | 43.34 | 40.55 | 42.23 | 54.92 | a | 58.30 | 61.59 | d | 65.88 | a | 64.17 | 50.27 | 40.73 | 36.53 | a | 49.16 | |||||||||
| 1964 | 32.56 | 35.76 | 39.12 | b | 44.75 | 50.05 | 58.48 | 64.87 | d | 65.24 | b | 58.43 | 55.12 | a | 38.67 | d | 36.73 | a | 48.32 | |||||||
| 1965 | 34.24 | 38.95 | 43.15 | 47.76 | c | 52.59 | d | 60.43 | c | 67.84 | b | 66.31 | d | 58.33 | c | 55.31 | d | 42.36 | e | 32.86 | c | 50.01 | ||||
| 1966 | 31.48 | 34.91 | 41.93 | a | 50.33 | c | 57.97 | a | 60.12 | d | 64.33 | b | 68.72 | a | 62.15 | 51.70 | a | 42.50 | 36.18 | 50.19 | ||||||
| 1967 | 34.65 | 39.12 | 39.55 | b | 38.94 | d | 55.05 | b | 61.43 | 70.45 | a | 72.62 | b | 66.17 | c | 50.39 | 44.12 | 27.54 | c | 50.00 | ||||||
| 1968 | 31.65 | a | 42.80 | b | 43.43 | a | 45.21 | a | 52.47 | 61.85 | 71.37 | 63.53 | b | 61.22 | c | 50.32 | 40.27 | 30.15 | 49.52 | |||||||
| 1969 | 28.27 | 33.14 | 40.22 | a | 46.00 | 56.40 | a | 63.05 | b | ----- | z | 66.10 | b | 62.30 | 46.44 | 42.27 | 37.32 | 47.41 | ||||||||
| 1970 | 37.08 | 40.50 | a | 41.82 | a | 42.05 | a | 54.55 | a | 65.31 | a | 70.78 | a | 69.58 | 57.62 | a | 49.50 | a | 42.88 | a | 31.66 | 50.28 | ||||
| 1971 | 32.81 | 36.33 | a | 37.56 | 44.15 | 52.53 | 57.93 | 68.82 | 71.23 | 59.18 | 47.50 | 40.23 | 31.32 | 48.30 | ||||||||||||
| 1972 | 31.13 | 37.07 | 46.11 | 45.92 | 55.71 | 63.10 | 70.94 | 69.11 | 58.70 | 51.18 | 39.73 | 27.39 | 49.67 | |||||||||||||
| 1973 | 31.81 | 40.30 | 40.06 | 47.28 | 59.18 | 61.97 | 70.11 | 67.71 | 59.78 | 49.39 | 39.55 | 36.66 | 50.32 | |||||||||||||
| 1974 | 28.69 | 31.95 | h | 37.96 | h | 41.50 | e | ----- | z | ----- | z | 65.57 | j | 69.02 | e | 66.52 | f | 52.97 | p | 42.02 | d | 35.79 | 43.40 | |||
| 1975 | 30.53 | a | 34.93 | 39.16 | 41.32 | 55.32 | 60.32 | 69.44 | 64.58 | 65.73 | 50.74 | 39.50 | 37.73 | 49.11 | ||||||||||||
| 1976 | 36.95 | 38.05 | 40.97 | 45.02 | 55.97 | 59.22 | 70.35 | 65.60 | 65.06 | e | 53.95 | 45.20 | 35.52 | 50.99 | ||||||||||||
| 1977 | 29.23 | 41.48 | 41.06 | 49.98 | 48.52 | a | 66.82 | 68.77 | 72.11 | 61.60 | 52.92 | 40.53 | 37.69 | 50.89 | ||||||||||||
| 1978 | 39.32 | 40.71 | 47.66 | 45.57 | 53.63 | 63.28 | 69.15 | 67.65 | 57.48 | 57.03 | ----- | z | 31.84 | 52.12 | ||||||||||||
| 1979 | 33.35 | 38.46 | 46.77 | 48.42 | 59.10 | 64.13 | 72.03 | 65.58 | 63.97 | 53.10 | 37.15 | 37.05 | 51.59 | |||||||||||||
| 1980 | 35.81 | 42.18 | d | 41.24 | 49.35 | 54.63 | 58.02 | 71.47 | 65.55 | 64.23 | 57.27 | 42.88 | 38.34 | 51.75 | ||||||||||||
| 1981 | 40.56 | 40.84 | 44.39 | 51.43 | 54.94 | 63.03 | 69.61 | 72.10 | 64.20 | 49.45 | a | 43.80 | 39.18 | 52.79 | ||||||||||||
| 1982 | 30.74 | 38.62 | 41.02 | 45.73 | 55.90 | 61.97 | 64.27 | 69.53 | 57.88 | 52.85 | 40.23 | 34.52 | 49.44 | |||||||||||||
| 1983 | 37.87 | 41.29 | 44.32 | 45.55 | 57.53 | 60.47 | 64.79 | 69.92 | 60.55 | 53.98 | 41.18 | ----- | z | 52.50 | ||||||||||||
| 1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 60.53 | 72.03 | 72.79 | 65.93 | 51.50 | 43.10 | 36.35 | 57.46 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 33.19 | 38.71 | 41.92 | 45.90 | 54.20 | 61.66 | 68.72 | 68.04 | 61.47 | 51.85 | 41.28 | 34.59 | 50.06 | |||||||||||||
| S.D. | 3.60 | 2.82 | 2.67 | 3.18 | 3.07 | 2.54 | 2.91 | 2.85 | 2.99 | 2.66 | 1.96 | 3.23 | 1.14 | |||||||||||||
| SKEW | 0.39 | -0.21 | 0.58 | -0.23 | -0.31 | 0.31 | -0.94 | 0.21 | 0.06 | 0.23 | -0.06 | -0.79 | 0.55 | |||||||||||||
| MAX | 40.56 | 43.34 | 47.66 | 51.43 | 59.18 | 66.82 | 72.03 | 72.79 | 66.17 | 57.27 | 45.20 | 39.18 | 52.79 | |||||||||||||
| MIN | 27.27 | 33.14 | 37.56 | 38.94 | 48.52 | 57.93 | 61.59 | 63.53 | 57.48 | 46.44 | 37.15 | 27.39 | 48.30 | |||||||||||||
| NO YRS | 24 | 23 | 23 | 24 | 23 | 24 | 23 | 25 | 25 | 25 | 25 | 25 | 20 | |||||||||||||