| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | 41.80 | k | 9999.00 | |
| 1931 | ----- | z | 42.73 | 46.05 | b | 51.60 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.79 | |||
| 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 | 48.79 | x | 43.38 | 41.84 | 42.61 | |||
| 1937 | 29.56 | 39.04 | 44.55 | 43.98 | 52.77 | a | 58.63 | 62.63 | 59.94 | 58.35 | 53.79 | 46.73 | 43.16 | 49.43 | ||||||||||||
| 1938 | 40.73 | 40.30 | 42.94 | 48.47 | 53.55 | 58.80 | 63.06 | 57.81 | ----- | z | ----- | z | ----- | z | ----- | z | 50.71 | |||||||||
| 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 | 60.76 | 59.68 | 57.95 | b | 51.47 | 42.73 | 35.89 | 51.41 | ||||||
| 1949 | 30.40 | 38.57 | 44.37 | 50.62 | 56.52 | 58.57 | 61.02 | 61.44 | 61.05 | 49.10 | 49.92 | 39.11 | 50.06 | |||||||||||||
| 1950 | 31.21 | 39.34 | 41.87 | 46.27 | 51.82 | 58.90 | 63.77 | 64.61 | 59.80 | 50.61 | 45.57 | 47.19 | 50.08 | |||||||||||||
| 1951 | 38.74 | 42.62 | 40.15 | 51.13 | 53.81 | 61.45 | 63.47 | 61.52 | 59.78 | 51.13 | 44.67 | 37.44 | 50.49 | |||||||||||||
| 1952 | 35.10 | 40.40 | 40.29 | 48.63 | 53.02 | b | 53.65 | 62.19 | g | 60.47 | 60.33 | d | 56.70 | a | 40.18 | b | 37.90 | g | 48.88 | |||||||
| 1953 | 44.16 | b | 41.86 | 41.87 | e | 45.84 | a | 50.12 | f | 51.08 | l | 59.40 | 60.15 | 57.11 | c | 50.48 | b | 45.40 | 40.73 | 48.70 | ||||||
| 1954 | 36.81 | 41.93 | a | 39.29 | c | 44.46 | b | 50.18 | a | 52.39 | k | 55.74 | d | 55.29 | j | 53.59 | a | 48.22 | h | 45.88 | m | 37.44 | o | 46.00 | ||
| 1955 | ----- | z | 35.46 | o | 38.86 | b | 41.32 | 48.92 | 54.78 | 56.38 | o | 64.22 | a | 58.32 | 52.03 | 42.24 | a | 38.28 | f | 50.09 | ||||||
| 1956 | 38.48 | 33.29 | 39.82 | 47.95 | 54.82 | c | 50.75 | r | ----- | z | ----- | z | 53.02 | g | 47.43 | h | 43.25 | z | 39.53 | 42.32 | ||||||
| 1957 | 31.86 | c | 41.23 | 44.79 | e | 48.41 | a | 56.91 | t | 58.65 | 58.97 | p | ----- | z | 61.03 | 51.32 | 43.58 | 42.07 | a | 46.99 | ||||||
| 1958 | 41.98 | 46.77 | 41.35 | 47.32 | 57.87 | 61.32 | 67.56 | 65.37 | 58.97 | 53.61 | 44.62 | 45.34 | 52.67 | |||||||||||||
| 1959 | 41.16 | 40.18 | 43.94 | 48.85 | 51.15 | 57.32 | 64.21 | 60.65 | 55.30 | 52.92 | 45.13 | 40.48 | 50.11 | |||||||||||||
| 1960 | 36.73 | 40.95 | a | 44.79 | 47.43 | 49.63 | 59.86 | a | 64.57 | c | 61.21 | 60.53 | 52.40 | 43.70 | 40.50 | 50.19 | ||||||||||
| 1961 | 43.10 | 43.66 | 43.45 | 46.67 | 51.71 | c | 62.90 | a | 64.16 | 66.90 | a | 56.33 | 51.71 | 41.43 | 40.24 | 51.02 | ||||||||||
| 1962 | 38.35 | 41.88 | 42.06 | 49.43 | b | 48.97 | 57.43 | 62.02 | 61.29 | 60.78 | 52.44 | 46.12 | 42.44 | 50.27 | ||||||||||||
| 1963 | 35.37 | 48.41 | a | 42.27 | 44.90 | 52.87 | 56.10 | 58.61 | 62.41 | b | 62.32 | 52.90 | 44.85 | 41.84 | 50.24 | |||||||||||
| 1964 | 40.87 | 41.48 | 41.94 | 45.47 | 50.40 | 55.73 | 61.84 | 60.90 | 57.35 | 53.11 | 41.97 | 38.69 | 49.15 | |||||||||||||
| 1965 | 38.77 | 42.50 | 46.56 | 48.53 | 50.61 | 54.85 | 63.87 | 62.74 | 57.98 | 55.00 | 46.80 | 37.80 | a | 50.50 | ||||||||||||
| 1966 | 39.98 | 40.79 | 43.13 | 49.90 | 53.28 | a | 57.58 | 61.39 | 62.81 | 59.43 | 51.65 | 46.17 | g | 42.79 | 51.16 | |||||||||||
| 1967 | 41.48 | 42.04 | 40.48 | 42.88 | 53.76 | 61.25 | b | 63.60 | a | 67.84 | 62.15 | 52.81 | 46.00 | 38.92 | 51.10 | |||||||||||
| 1968 | 39.35 | 47.00 | 45.77 | 46.05 | 52.52 | 59.63 | g | 64.10 | 61.22 | f | 59.43 | a | 50.15 | 44.53 | 37.31 | 48.62 | ||||||||||
| 1969 | 33.77 | 37.57 | 43.98 | 45.75 | 56.27 | 60.88 | a | 60.60 | a | 60.31 | m | 58.03 | a | 49.84 | 45.13 | 41.22 | b | 48.46 | ||||||||
| 1970 | 40.79 | 44.38 | 44.19 | 43.25 | 52.06 | 59.89 | b | 61.56 | n | 62.44 | 55.00 | 50.18 | 43.98 | 37.61 | 48.53 | |||||||||||
| 1971 | 38.82 | 40.09 | 39.11 | 45.67 | a | 53.06 | 53.63 | 63.67 | d | 64.37 | a | 56.92 | 49.50 | 43.17 | 36.82 | 48.74 | ||||||||||
| 1972 | 36.21 | 41.26 | 46.08 | 42.80 | 54.32 | 57.35 | f | 64.77 | 65.12 | c | 56.05 | 51.37 | 45.48 | 34.90 | 48.94 | |||||||||||
| 1973 | 37.27 | 43.30 | 42.37 | 47.52 | c | 54.16 | 56.42 | 62.50 | m | 59.04 | f | 59.62 | 50.71 | 41.61 | c | 42.63 | 47.56 | |||||||||
| 1974 | 36.35 | 40.23 | 43.69 | 47.03 | 49.77 | 59.03 | 60.92 | 62.58 | 63.57 | 52.60 | 45.90 | 42.52 | 50.35 | |||||||||||||
| 1975 | 41.29 | 40.46 | 41.71 | 43.08 | 53.05 | 56.07 | 61.53 | 59.85 | a | 61.85 | 48.82 | 42.45 | 41.84 | 49.33 | ||||||||||||
| 1976 | 42.00 | 40.21 | 42.19 | 46.07 | 52.98 | 54.62 | 60.47 | 60.31 | 60.67 | 53.29 | 47.45 | 41.47 | 50.14 | |||||||||||||
| 1977 | 40.47 | 44.95 | 41.79 | 49.75 | 48.42 | 59.64 | a | 60.58 | a | 66.02 | 56.63 | d | 52.11 | 43.12 | 42.29 | 50.48 | ||||||||||
| 1978 | 42.65 | 44.62 | 47.73 | 46.57 | 51.10 | 59.93 | 63.15 | 62.16 | 57.23 | 54.45 | 40.97 | 35.15 | 50.47 | |||||||||||||
| 1979 | 33.06 | 39.29 | 47.23 | 47.97 | 54.03 | 57.50 | a | 62.69 | 61.43 | a | 61.15 | 54.33 | a | 44.27 | 43.84 | 50.57 | ||||||||||
| 1980 | 36.23 | a | 44.31 | 42.77 | a | 48.97 | 51.29 | 54.00 | 62.53 | 59.89 | 59.50 | 53.18 | 46.42 | 42.94 | 50.17 | |||||||||||
| 1981 | 42.25 | a | 43.02 | 45.11 | 47.75 | 51.55 | 55.67 | 62.34 | 64.69 | 59.35 | 51.03 | 46.46 | b | 41.48 | 50.89 | |||||||||||
| 1982 | 36.90 | 39.96 | 42.65 | 44.05 | 53.37 | 59.93 | 60.50 | 62.26 | 59.33 | 52.05 | 42.38 | 39.03 | 49.37 | |||||||||||||
| 1983 | 42.74 | 44.05 | 46.26 | 47.97 | 54.50 | 55.31 | q | 59.85 | 63.15 | 56.02 | 50.50 | a | 45.37 | 35.16 | 49.60 | |||||||||||
| 1984 | 41.24 | 42.71 | 45.95 | 44.73 | 50.29 | 55.88 | 63.47 | 61.97 | 57.82 | 48.34 | 43.37 | 36.29 | 49.34 | |||||||||||||
| 1985 | 36.94 | 38.75 | 40.77 | 48.80 | 51.53 | 58.35 | 65.58 | 62.27 | 55.72 | 49.32 | 35.53 | a | 35.72 | a | 48.27 | |||||||||||
| 1986 | 42.66 | 42.05 | 48.61 | 46.18 | 53.03 | 60.58 | 59.73 | 65.32 | 55.52 | 56.88 | s | ----- | z | ----- | z | 52.63 | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 38.36 | 41.70 | 43.24 | 46.83 | 52.45 | 57.94 | 62.23 | 62.45 | 58.66 | 51.81 | 44.12 | 40.11 | 50.14 | |||||||||||||
| S.D. | 3.77 | 2.74 | 2.46 | 2.43 | 2.13 | 2.49 | 2.24 | 2.28 | 2.31 | 1.84 | 2.49 | 3.02 | 0.87 | |||||||||||||
| SKEW | -0.65 | -0.12 | 0.18 | -0.19 | 0.25 | -0.08 | -0.39 | 0.42 | -0.07 | 0.32 | -0.86 | -0.01 | 0.50 | |||||||||||||
| MAX | 44.16 | 48.41 | 48.61 | 51.60 | 57.87 | 62.90 | 67.56 | 67.84 | 63.57 | 56.70 | 49.92 | 47.19 | 52.67 | |||||||||||||
| MIN | 29.56 | 33.29 | 38.86 | 41.32 | 48.42 | 53.63 | 55.74 | 57.81 | 53.59 | 48.34 | 35.53 | 34.90 | 48.27 | |||||||||||||
| NO YRS | 39 | 40 | 41 | 41 | 38 | 34 | 35 | 35 | 39 | 37 | 37 | 37 | 25 | |||||||||||||