| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.41 | a | 56.79 | ----- | z | 56.88 | f | ----- | z | ----- | z | ----- | z | 56.60 | ||
| 1923 | ----- | z | ----- | z | ----- | z | 49.07 | a | 52.24 | 55.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.36 | |||
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 54.88 | a | 58.69 | 59.45 | b | 58.63 | 53.97 | 49.47 | 45.29 | e | 54.34 | |||||
| 1954 | 39.79 | c | 45.04 | c | 42.72 | h | 48.15 | 54.28 | a | 53.82 | b | 57.27 | c | 58.81 | b | 57.60 | d | 52.73 | 52.62 | d | 45.08 | r | 52.01 | |||
| 1955 | 41.60 | a | 41.23 | 41.34 | 43.95 | 49.33 | e | 55.45 | 57.68 | a | 56.44 | 55.72 | a | 51.60 | a | 42.74 | a | 41.60 | a | 48.22 | ||||||
| 1956 | 41.79 | 38.78 | 42.85 | 49.13 | 53.82 | c | 55.72 | a | 59.75 | a | 58.55 | 56.62 | 47.75 | m | 45.91 | a | 43.35 | 49.66 | ||||||||
| 1957 | 36.95 | 42.09 | 45.68 | 48.82 | 54.06 | 57.28 | c | 58.19 | 58.82 | 60.75 | 53.24 | d | 46.27 | 45.40 | a | 50.63 | ||||||||||
| 1958 | 46.73 | c | 49.71 | 44.73 | 48.97 | 55.17 | a | 61.14 | a | 61.87 | 59.80 | a | ----- | z | ----- | z | ----- | z | ----- | z | 53.51 | |||||
| 1959 | ----- | z | ----- | z | ----- | z | 51.50 | z | ----- | z | 56.54 | c | 58.87 | 57.16 | 55.57 | 53.59 | b | 45.39 | c | 42.29 | e | 52.77 | ||||
| 1960 | 39.76 | 42.45 | 44.11 | 48.40 | a | 50.32 | 54.66 | a | 54.28 | a | 56.98 | c | 54.91 | b | 50.98 | a | 45.57 | b | 43.05 | 48.79 | ||||||
| 1961 | 46.94 | 45.61 | 45.34 | 46.74 | a | 51.39 | 56.50 | 60.72 | b | 58.43 | c | 54.10 | 50.03 | 43.28 | a | 41.64 | b | 50.06 | ||||||||
| 1962 | 40.13 | 43.75 | 42.92 | a | 48.17 | 49.48 | 53.67 | a | 56.05 | 58.48 | 56.52 | a | 52.68 | 49.05 | 44.11 | 49.58 | ||||||||||
| 1963 | 37.52 | 49.70 | 44.28 | b | 48.13 | d | 52.52 | 54.65 | 58.82 | 59.32 | 59.26 | a | 54.53 | 47.79 | b | 45.37 | 50.99 | |||||||||
| 1964 | 43.85 | 42.47 | 44.13 | 45.23 | 49.65 | ----- | z | 57.69 | 57.45 | a | 56.35 | 53.24 | 43.63 | 40.19 | b | 48.54 | ||||||||||
| 1965 | 42.58 | 43.89 | 46.19 | 48.43 | 50.05 | 54.12 | 57.48 | a | 60.06 | 55.18 | 53.76 | 49.63 | 42.03 | a | 50.29 | |||||||||||
| 1966 | 43.05 | 43.88 | 44.66 | 49.85 | 50.52 | 55.75 | 57.63 | 57.82 | 58.75 | 52.19 | 47.79 | a | 45.95 | 50.65 | ||||||||||||
| 1967 | 44.31 | 44.21 | 43.08 | 44.62 | b | 51.48 | b | 57.37 | 57.98 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.01 | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 41.92 | 44.06 | 44.11 | 47.69 | 51.74 | 55.86 | 58.11 | 58.40 | 56.92 | 52.71 | 46.86 | 43.36 | 49.90 | |||||||||||||
| S.D. | 3.11 | 3.06 | 1.37 | 1.83 | 1.97 | 1.81 | 1.78 | 1.10 | 1.95 | 1.31 | 2.88 | 1.87 | 0.97 | |||||||||||||
| SKEW | 0.07 | 0.54 | -0.41 | -0.99 | 0.36 | 1.45 | 0.11 | -0.21 | 0.46 | -0.64 | 0.31 | -0.06 | -0.73 | |||||||||||||
| MAX | 46.94 | 49.71 | 46.19 | 49.85 | 55.17 | 61.14 | 61.87 | 60.06 | 60.75 | 54.53 | 52.62 | 45.95 | 50.99 | |||||||||||||
| MIN | 36.95 | 38.78 | 41.34 | 43.95 | 49.33 | 53.67 | 54.28 | 56.44 | 54.10 | 50.03 | 42.74 | 40.19 | 48.22 | |||||||||||||
| NO YRS | 13 | 13 | 12 | 14 | 14 | 16 | 16 | 14 | 13 | 12 | 13 | 12 | 8 | |||||||||||||