| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1901 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1906 | ----- | z | ----- | z | ----- | z | ----- | z | 50.00 | z | ----- | z | ----- | z | 57.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1907 | ----- | z | 14.50 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 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 | 36.48 | a | 37.89 | 42.08 | 47.90 | 57.00 | 58.97 | 64.95 | 63.89 | 57.07 | b | 48.34 | 36.88 | 31.44 | 48.57 | |||||||||||
| 1932 | 32.37 | d | 31.59 | 40.40 | 46.70 | 51.95 | b | 60.25 | 60.61 | 62.27 | 58.03 | 50.10 | 43.17 | 30.74 | 47.35 | |||||||||||
| 1933 | 33.35 | 31.15 | d | 38.19 | 45.80 | b | 48.26 | 57.00 | 62.82 | 64.47 | 53.68 | 51.97 | 42.67 | 40.50 | 47.49 | |||||||||||
| 1934 | 40.66 | 42.27 | 49.35 | 54.10 | 55.81 | 58.20 | 61.63 | 64.40 | 56.12 | 51.81 | 44.23 | 37.16 | 51.31 | |||||||||||||
| 1935 | 32.15 | 39.09 | 39.65 | 47.30 | 54.34 | c | 60.45 | 63.61 | 61.69 | b | 60.17 | 47.89 | h | 36.53 | 33.06 | 48.00 | ||||||||||
| 1936 | 36.02 | 24.33 | 39.61 | 48.77 | 54.60 | 59.80 | 62.84 | 63.47 | 57.20 | 52.15 | 38.80 | 39.97 | 48.13 | |||||||||||||
| 1937 | 23.02 | 34.29 | 41.48 | 44.07 | 52.90 | 60.12 | 63.97 | 60.74 | 56.68 | 52.08 | 43.23 | 37.31 | 47.49 | |||||||||||||
| 1938 | 34.97 | 35.34 | 40.27 | 47.60 | 52.65 | 59.80 | 66.18 | 60.40 | 61.83 | 50.10 | 37.97 | 36.02 | a | 48.59 | ||||||||||||
| 1939 | 38.23 | 35.04 | 43.06 | 49.41 | a | 55.31 | 56.47 | 64.84 | 64.08 | a | 59.62 | a | 51.26 | b | 42.83 | 40.34 | 50.04 | |||||||||
| 1940 | 34.69 | 38.69 | 45.10 | 48.07 | 56.42 | 61.22 | 63.00 | 64.05 | 60.17 | 52.37 | 37.30 | 36.19 | 49.77 | |||||||||||||
| 1941 | 34.45 | 39.71 | 46.29 | 50.62 | 53.61 | 57.28 | 66.66 | 63.37 | 56.03 | 49.45 | 43.03 | 37.55 | 49.84 | |||||||||||||
| 1942 | 27.58 | 36.98 | 41.94 | 49.78 | 52.79 | 57.70 | 65.65 | 65.58 | 60.37 | 51.77 | 38.33 | 35.85 | 48.69 | |||||||||||||
| 1943 | 27.31 | 36.71 | 38.52 | 48.88 | 50.98 | 56.77 | 64.00 | 61.40 | 61.09 | a | 50.34 | 41.02 | 34.37 | 47.62 | ||||||||||||
| 1944 | 32.42 | 36.74 | 40.63 | 46.23 | 53.29 | 58.05 | 64.08 | 61.47 | 60.22 | 53.03 | 39.28 | 31.61 | 48.09 | |||||||||||||
| 1945 | 36.15 | 38.14 | 38.34 | 43.98 | 53.84 | 56.27 | 64.02 | 63.95 | 56.22 | 50.24 | 38.23 | 33.32 | 47.72 | |||||||||||||
| 1946 | 35.58 | 36.54 | 41.03 | 46.31 | c | 54.76 | 55.77 | 62.55 | 62.94 | 56.40 | 45.00 | 37.87 | 36.23 | 47.58 | ||||||||||||
| 1947 | 31.38 | c | 39.29 | 44.50 | 49.13 | 57.34 | 56.23 | 61.60 | 60.03 | 58.18 | 49.23 | 40.53 | 36.63 | 48.67 | ||||||||||||
| 1948 | 33.84 | 34.16 | 38.00 | 43.23 | 51.25 | a | 61.07 | 60.65 | 60.48 | 54.97 | 47.52 | 37.58 | 30.52 | 46.10 | ||||||||||||
| 1949 | 20.10 | 32.02 | 38.46 | f | 47.07 | a | 54.95 | 56.75 | 61.21 | 61.94 | 58.50 | 43.31 | 44.10 | 34.37 | 46.76 | |||||||||||
| 1950 | 18.95 | 30.36 | 36.68 | 41.52 | 48.53 | 58.03 | 62.71 | 63.73 | 57.65 | 47.03 | 38.73 | 38.13 | 45.17 | |||||||||||||
| 1951 | 31.77 | 35.07 | 36.03 | 46.80 | 52.15 | 59.00 | 62.94 | 62.03 | a | ----- | z | 47.39 | 38.81 | a | 31.03 | 45.73 | ||||||||||
| 1952 | 27.97 | 34.41 | 37.61 | 47.17 | 52.27 | 55.78 | 63.84 | 63.10 | 59.85 | 54.52 | 35.30 | 33.31 | 47.09 | |||||||||||||
| 1953 | 41.08 | 38.43 | 40.50 | 44.12 | 49.63 | 53.90 | 62.11 | 61.29 | 57.97 | 49.81 | 42.90 | 38.35 | 48.34 | |||||||||||||
| 1954 | 32.40 | 35.32 | 37.00 | 43.95 | 52.23 | 53.85 | 59.11 | 57.21 | 55.48 | 47.65 | 46.22 | 32.42 | s | 47.31 | ||||||||||||
| 1955 | 33.60 | 34.84 | 35.10 | f | 41.07 | 48.87 | 57.60 | 58.50 | 60.92 | 56.18 | 48.26 | 34.72 | 31.13 | 45.97 | ||||||||||||
| 1956 | 31.73 | 29.14 | 36.35 | 45.65 | 54.79 | 55.47 | 65.47 | 63.10 | 56.53 | 45.15 | 35.82 | 33.16 | 46.03 | |||||||||||||
| 1957 | 22.53 | 34.57 | 39.65 | 46.75 | 55.31 | 58.70 | c | 61.85 | a | 60.45 | a | 62.25 | 47.43 | a | 39.17 | 37.34 | 47.17 | |||||||||
| 1958 | 35.61 | 42.43 | e | 39.90 | f | 44.55 | b | 59.57 | a | 63.28 | e | 67.15 | a | 68.45 | 58.86 | a | 48.85 | g | 40.25 | d | 38.76 | 51.89 | ||||
| 1959 | 34.58 | 35.61 | a | 40.28 | d | 45.83 | a | 49.65 | e | 59.12 | b | 67.50 | c | 62.97 | 58.95 | s | ----- | z | 37.28 | a | 33.80 | a | 46.66 | |||
| 1960 | 29.06 | d | 36.68 | l | 37.31 | m | 45.45 | k | 49.91 | t | 60.64 | e | 67.88 | a | 61.63 | a | 56.80 | b | 49.22 | m | 39.85 | m | 32.47 | l | 55.20 | |
| 1961 | 35.33 | g | 39.89 | j | 41.48 | i | 44.97 | j | 52.29 | g | 64.02 | 66.45 | 68.69 | 53.67 | 47.07 | i | 35.88 | j | 33.60 | j | 63.21 | |||||
| 1962 | 31.15 | k | 35.78 | l | 38.12 | g | 48.26 | i | 48.98 | j | 59.81 | i | 63.67 | a | 62.39 | 58.25 | b | 49.41 | i | 41.79 | k | 37.50 | n | 61.43 | ||
| 1963 | 29.50 | j | 40.16 | i | 41.60 | j | 43.25 | h | 52.82 | i | 58.54 | d | 59.94 | 63.26 | 62.65 | 51.67 | h | 40.88 | i | 31.95 | k | 61.10 | ||||
| 1964 | 35.95 | j | 36.05 | j | 38.89 | i | 44.00 | i | 49.31 | m | 57.14 | h | 64.08 | 60.60 | 53.72 | 48.78 | h | 37.42 | k | 32.33 | j | 59.46 | ||||
| 1965 | 33.20 | k | ----- | z | 38.89 | h | 48.38 | j | 50.50 | l | 59.26 | g | 65.58 | a | 63.17 | a | 53.40 | 50.23 | g | 42.92 | j | 32.40 | j | 60.72 | ||
| 1966 | 31.38 | j | ----- | z | 36.67 | h | 45.75 | z | 55.38 | j | 57.90 | e | 64.77 | 65.00 | 60.60 | 48.74 | f | 41.08 | k | 36.93 | i | 62.07 | ||||
| 1967 | 37.45 | k | 38.78 | l | 38.86 | i | 43.50 | j | 53.23 | i | 65.12 | d | 66.65 | 70.52 | 63.22 | a | 49.55 | j | 39.95 | j | 31.83 | k | 66.38 | |||
| 1968 | 32.95 | k | 39.22 | b | 43.89 | 45.50 | b | 54.47 | 59.46 | e | 66.31 | 61.95 | 58.28 | g | 46.95 | i | 40.24 | k | 30.83 | j | 52.97 | |||||
| 1969 | 26.52 | i | 32.72 | j | 37.22 | m | 44.43 | 57.63 | a | 65.42 | 64.24 | 63.40 | 60.60 | 48.64 | c | 41.33 | 33.98 | f | 55.71 | |||||||
| 1970 | 32.88 | f | 40.56 | d | 42.06 | g | 44.08 | r | 56.44 | e | 64.62 | 68.21 | b | 65.85 | a | 55.38 | d | 46.87 | 39.03 | 31.24 | 52.02 | |||||
| 1971 | 32.42 | 36.42 | b | 36.77 | 45.02 | d | 54.43 | d | 55.47 | a | 66.53 | b | 69.08 | 56.85 | 46.65 | 39.22 | 32.52 | c | 47.61 | |||||||
| 1972 | 31.59 | c | 35.57 | b | 43.62 | a | 43.07 | c | 57.82 | 60.32 | b | 66.71 | 68.65 | g | 55.42 | f | 48.52 | i | 40.40 | i | 27.26 | l | 48.39 | |||
| 1973 | 28.21 | n | 34.26 | k | 41.53 | 46.84 | h | 56.72 | h | 59.95 | a | ----- | z | 60.29 | l | 59.30 | h | 49.93 | p | 36.52 | i | 36.59 | o | 50.74 | ||
| 1974 | 27.71 | e | 35.57 | 39.56 | 46.22 | 51.06 | f | 63.17 | 65.40 | 63.10 | k | 60.14 | b | 48.77 | 38.22 | 37.63 | 46.24 | |||||||||
| 1975 | 32.42 | 33.18 | 37.76 | 42.42 | 51.47 | 57.07 | 66.48 | 60.90 | a | 61.23 | 49.79 | 37.67 | 37.05 | c | 47.29 | |||||||||||
| 1976 | 36.98 | 36.28 | 37.66 | 46.00 | h | 55.34 | 57.20 | 65.20 | a | 65.16 | 64.17 | 54.58 | 40.30 | 35.12 | k | 51.29 | ||||||||||
| 1977 | 29.04 | e | 36.57 | 37.50 | 46.88 | 46.55 | 59.18 | b | 63.90 | 72.69 | j | ----- | z | ----- | z | ----- | z | ----- | z | 45.66 | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 31.95 | 35.77 | 40.32 | 46.28 | 53.49 | 58.89 | 64.09 | 63.15 | 58.24 | 49.46 | 39.67 | 35.21 | 47.99 | |||||||||||||
| S.D. | 5.11 | 3.60 | 3.10 | 2.66 | 2.97 | 2.82 | 2.35 | 2.60 | 2.77 | 2.70 | 2.80 | 3.04 | 1.36 | |||||||||||||
| SKEW | -0.77 | -0.77 | 0.89 | 0.43 | -0.31 | 0.59 | -0.39 | 0.82 | 0.13 | -0.12 | 0.42 | 0.01 | 0.37 | |||||||||||||
| MAX | 41.08 | 42.43 | 49.35 | 54.10 | 59.57 | 65.42 | 68.21 | 70.52 | 64.17 | 54.58 | 46.22 | 40.50 | 51.31 | |||||||||||||
| MIN | 18.95 | 24.33 | 36.03 | 41.07 | 46.55 | 53.85 | 58.50 | 57.21 | 53.40 | 43.31 | 34.72 | 30.52 | 45.17 | |||||||||||||
| NO YRS | 36 | 37 | 34 | 36 | 37 | 44 | 46 | 43 | 41 | 32 | 35 | 32 | 24 | |||||||||||||