| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 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 | ----- | 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 | 24.33 | a | 9.37 | 12.80 | a | 15.50 | ||
| 1937 | ----- | z | ----- | z | ----- | z | ----- | z | 40.06 | 49.07 | a | 50.29 | 50.74 | 43.10 | 38.35 | 30.87 | 27.39 | 41.23 | ||||||||
| 1938 | 25.32 | 24.11 | 27.32 | 36.77 | 42.06 | 48.93 | 54.48 | 49.32 | 46.87 | 34.81 | e | 22.47 | 23.23 | 36.31 | ||||||||||||
| 1939 | 23.29 | 20.54 | 27.06 | 34.47 | 40.16 | 41.70 | 52.19 | 49.87 | 41.00 | 32.55 | 24.07 | 30.06 | 34.75 | |||||||||||||
| 1940 | 25.65 | 29.79 | 30.26 | ----- | z | 41.42 | 47.37 | 49.77 | 49.13 | 42.93 | 37.19 | 26.73 | 25.72 | b | 36.91 | |||||||||||
| 1941 | 25.03 | 30.88 | b | 27.06 | 32.07 | 39.39 | 42.53 | 51.42 | 48.13 | 36.57 | 32.48 | 31.87 | 25.74 | 35.26 | ||||||||||||
| 1942 | 18.10 | 22.82 | 32.54 | g | 39.83 | f | 38.52 | 42.77 | 54.65 | 50.94 | 40.00 | 33.84 | 28.47 | 26.00 | 35.61 | |||||||||||
| 1943 | 18.55 | 25.86 | 26.94 | 36.47 | 36.39 | 39.67 | 50.00 | 45.74 | 43.60 | 36.19 | 27.30 | 19.52 | 33.85 | |||||||||||||
| 1944 | 19.03 | 23.17 | 24.28 | b | 31.50 | 37.13 | 41.67 | 49.19 | 46.65 | 40.57 | 34.90 | 24.00 | 21.35 | 32.79 | ||||||||||||
| 1945 | 21.68 | 25.89 | 25.71 | 28.97 | 40.16 | 42.80 | 50.81 | 49.26 | 36.41 | a | 35.39 | 28.20 | 21.74 | 33.92 | ||||||||||||
| 1946 | 21.10 | 21.82 | 28.06 | 32.30 | 39.10 | 43.73 | 49.94 | 50.03 | 39.17 | 29.71 | 26.17 | 26.00 | 33.93 | |||||||||||||
| 1947 | 16.29 | 26.32 | 28.68 | 32.00 | 43.23 | 42.70 | 48.90 | 45.97 | 38.83 | 37.74 | 25.47 | 25.03 | 34.26 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.40 | a | 47.13 | 39.60 | 31.26 | 25.28 | a | 16.00 | 34.61 | |||||
| 1949 | 1.27 | a | 21.78 | a | 29.10 | 33.83 | 42.29 | 45.07 | 50.84 | 48.87 | a | 44.37 | 30.06 | 29.34 | a | 21.32 | 33.18 | |||||||||
| 1950 | 17.10 | 25.83 | d | 26.81 | o | 30.70 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.54 | ||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.25 | n | 51.00 | 46.74 | 40.96 | f | 29.23 | 24.62 | a | 16.26 | 33.57 | |||||
| 1952 | 15.06 | 20.62 | 21.00 | 29.55 | a | 35.27 | e | 41.29 | w | 45.93 | b | 45.05 | k | 42.21 | k | 33.26 | l | 19.90 | i | ----- | z | 27.91 | ||||
| 1953 | ----- | z | ----- | z | 29.05 | i | 30.23 | 35.03 | 40.43 | 50.33 | a | 49.23 | 43.36 | b | 34.55 | b | 34.97 | 25.70 | a | 38.20 | ||||||
| 1954 | 23.71 | 28.21 | 24.65 | 33.40 | 38.97 | 39.92 | e | 50.74 | 44.94 | 37.46 | b | 31.16 | 29.43 | 25.89 | v | 34.78 | ||||||||||
| 1955 | 21.23 | r | 18.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.79 | ||
| 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 | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1960 | ----- | z | ----- | z | ----- | z | 29.44 | l | 36.87 | 45.32 | e | 54.61 | 46.38 | b | 40.64 | b | 33.00 | 27.00 | b | 20.10 | a | 37.99 | ||||
| 1961 | 21.71 | 28.57 | 28.23 | 29.70 | 36.43 | a | 49.38 | a | 51.52 | d | 52.73 | i | ----- | z | ----- | z | ----- | z | ----- | z | 35.08 | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 19.53 | 24.69 | 26.80 | 32.28 | 38.97 | 43.94 | 50.79 | 48.18 | 40.90 | 33.15 | 26.42 | 22.59 | 34.25 | |||||||||||||
| S.D. | 6.08 | 3.56 | 2.43 | 2.46 | 2.49 | 3.25 | 2.16 | 1.86 | 2.95 | 3.51 | 5.27 | 4.59 | 1.07 | |||||||||||||
| SKEW | -1.80 | 0.12 | -0.95 | 0.49 | 0.01 | 0.49 | 0.13 | -0.19 | 0.21 | -0.66 | -1.70 | -0.54 | 0.58 | |||||||||||||
| MAX | 25.65 | 30.88 | 30.26 | 36.77 | 43.23 | 49.38 | 54.65 | 50.94 | 46.87 | 38.35 | 34.97 | 30.06 | 36.31 | |||||||||||||
| MIN | 1.27 | 18.79 | 21.00 | 28.97 | 35.03 | 39.67 | 45.93 | 44.94 | 36.41 | 24.33 | 9.37 | 12.80 | 32.79 | |||||||||||||
| NO YRS | 15 | 16 | 13 | 14 | 17 | 16 | 19 | 17 | 16 | 18 | 18 | 17 | 9 | |||||||||||||