YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1911 | 21.53 | a | 12.71 | 23.29 | 26.53 | 33.48 | 43.45 | a | 50.27 | a | 46.42 | 43.50 | 26.52 | 12.60 | 7.60 | a | 28.99 | |||||||||
1912 | 14.53 | a | 9.83 | 12.71 | 24.57 | 33.55 | 40.33 | 47.16 | 46.60 | a | 35.37 | 28.67 | a | 19.24 | a | 6.42 | 26.58 | |||||||||
1913 | 5.50 | c | 4.46 | b | 14.29 | c | 26.46 | b | 35.43 | c | 42.07 | 46.54 | c | 48.30 | a | 36.00 | 26.55 | 22.13 | g | 6.30 | d | 26.54 | a | |||
1914 | 19.30 | a | 10.33 | a | 19.10 | 26.90 | 37.90 | 45.90 | 49.65 | 47.50 | a | 40.28 | a | 34.06 | 22.79 | a | 7.64 | c | 30.11 | |||||||
1915 | 7.63 | a | 18.07 | 15.63 | a | 32.87 | 34.61 | 41.83 | 47.62 | b | 44.97 | 40.87 | 33.29 | 23.33 | c | 17.07 | a | 29.82 | ||||||||
1916 | 10.71 | 18.97 | 26.29 | 27.39 | b | 35.66 | b | 42.77 | 52.29 | 49.00 | a | 40.80 | 30.53 | a | 19.00 | a | 10.66 | b | 30.34 | |||||||
1917 | 8.80 | a | 17.64 | c | 14.71 | c | 28.20 | y | 32.29 | 41.90 | a | 50.42 | 46.19 | 42.50 | b | 27.58 | e | 29.03 | a | 17.89 | c | 29.91 | a | |||
1918 | 4.44 | d | 14.82 | f | 27.27 | e | 23.69 | a | 37.70 | a | 49.63 | 49.39 | 50.16 | 39.07 | c | 35.53 | a | 19.07 | c | 17.68 | f | 33.60 | b | |||
1919 | 17.00 | a | 14.11 | 22.16 | 30.10 | 37.21 | b | 44.67 | c | 53.03 | a | 51.73 | a | 43.70 | 27.28 | f | 16.93 | a | 15.87 | a | 31.50 | a | ||||
1920 | 19.52 | b | ----- | z | 17.96 | c | 19.97 | 35.63 | d | 44.14 | b | 49.29 | 45.58 | 40.86 | b | 31.29 | c | 19.76 | e | 14.63 | d | 30.78 | a | |||
1921 | 14.22 | h | 16.55 | f | 23.30 | h | 25.28 | a | 37.68 | 44.39 | b | 49.43 | a | 49.58 | e | 41.21 | b | 34.86 | b | 23.73 | 20.32 | 36.28 | c | |||
1922 | 7.20 | a | 11.54 | 19.80 | a | 26.34 | a | 36.07 | a | 46.47 | 48.87 | 51.30 | a | 44.36 | b | 30.75 | c | 20.10 | a | 18.00 | 30.07 | |||||
1923 | 19.48 | d | 9.62 | d | 14.29 | c | 26.68 | b | 36.33 | a | 44.28 | a | 50.97 | 48.26 | 40.80 | 27.06 | 22.32 | b | 14.54 | c | 29.55 | |||||
1924 | 13.37 | a | 18.83 | 12.40 | a | 26.14 | a | 33.48 | 44.69 | a | 49.48 | 48.73 | a | 39.80 | 33.13 | a | 21.50 | 9.90 | a | 29.29 | ||||||
1925 | 10.66 | b | 21.00 | 24.27 | a | 31.23 | 39.81 | 45.00 | 50.94 | 48.10 | 43.24 | a | 26.37 | a | 22.20 | 12.94 | 31.31 | |||||||||
1926 | 13.25 | c | 21.00 | 16.36 | c | 30.23 | d | 37.57 | c | 45.20 | 49.23 | 47.87 | 38.31 | a | 30.00 | e | 22.00 | f | 11.46 | g | 32.90 | b | ||||
1927 | 13.96 | c | 18.20 | c | 18.96 | c | 27.96 | d | 37.73 | a | 44.00 | 48.58 | 46.29 | 40.24 | a | 33.03 | 25.21 | a | 3.54 | g | 32.20 | a | ||||
1928 | 19.00 | d | 11.16 | d | 22.23 | a | 23.83 | 38.13 | 40.93 | b | 48.45 | 46.35 | 39.57 | b | 31.13 | a | 18.29 | b | 11.79 | c | 29.24 | |||||
1929 | 7.74 | d | 4.81 | b | 19.90 | b | 27.22 | c | 34.66 | b | 43.20 | 50.61 | c | 52.06 | 40.45 | a | 31.39 | 14.79 | b | 17.70 | a | 28.71 | ||||
1930 | -1.00 | 20.36 | 17.45 | 33.97 | 34.97 | 44.33 | 50.87 | 48.71 | 41.18 | b | 29.87 | 20.60 | 13.10 | 29.53 | ||||||||||||
1931 | 15.69 | b | 20.68 | 16.54 | c | 27.10 | 34.37 | a | 49.50 | 51.35 | 49.35 | 46.03 | a | 33.30 | a | 18.50 | 18.74 | 31.76 | ||||||||
1932 | 10.20 | a | 18.00 | b | 10.26 | d | 27.63 | 37.48 | 41.87 | 51.68 | 49.00 | 40.90 | 25.77 | 21.40 | 3.42 | 28.13 | ||||||||||
1933 | 12.80 | a | 4.60 | c | 20.12 | e | 23.90 | 34.97 | 47.62 | a | 50.94 | 48.53 | a | 43.89 | b | 32.68 | 22.90 | 23.00 | a | 30.50 | ||||||
1934 | 19.58 | 18.89 | 21.84 | 30.27 | 42.03 | 46.73 | 52.68 | 51.45 | 37.75 | b | 34.74 | 24.93 | 16.58 | 33.12 | ||||||||||||
1935 | 16.53 | a | 18.04 | 19.70 | a | 25.07 | c | 33.48 | 43.63 | 50.42 | 50.39 | 41.93 | 30.71 | 19.76 | a | 14.26 | 30.33 | |||||||||
1936 | 11.52 | 6.83 | 19.42 | 28.20 | 40.03 | 48.17 | 52.81 | 51.42 | 41.66 | a | 31.42 | 19.93 | a | 17.26 | 30.72 | |||||||||||
1937 | 2.58 | 12.19 | b | 18.29 | 26.97 | 37.39 | 43.97 | 49.94 | 51.94 | 43.03 | 32.65 | 20.13 | 14.35 | 29.45 | ||||||||||||
1938 | 12.45 | 18.18 | 22.24 | b | 27.00 | b | 32.45 | 44.27 | 47.65 | 51.68 | 42.14 | a | 33.94 | 15.70 | 16.13 | a | 30.32 | |||||||||
1939 | 14.61 | 7.54 | 21.29 | 28.40 | 38.68 | 42.93 | 51.32 | 47.32 | 43.33 | 32.52 | 23.37 | 21.63 | a | 31.08 | ||||||||||||
1940 | 8.29 | 17.10 | 22.74 | 28.00 | 37.26 | 44.27 | 52.29 | 47.45 | 44.97 | 35.03 | a | 20.83 | 19.14 | b | 31.45 | |||||||||||
1941 | 15.52 | 18.30 | a | 22.60 | a | 27.77 | 39.58 | 44.13 | 48.71 | 48.97 | 40.72 | a | 33.20 | a | 25.60 | 15.03 | 31.68 | |||||||||
1942 | 14.13 | 6.86 | 18.00 | ----- | z | 35.80 | a | 43.96 | b | 51.42 | 50.26 | 43.27 | ----- | z | 20.07 | 21.35 | 30.51 | b | ||||||||
1943 | 14.06 | 20.44 | a | 15.58 | 32.50 | 34.58 | 45.77 | 54.10 | 54.97 | 42.07 | 33.52 | 25.00 | 18.90 | 32.62 | ||||||||||||
1944 | 17.55 | 16.72 | 16.60 | a | 25.73 | 38.74 | 45.60 | 50.74 | 51.90 | 43.97 | 35.61 | 24.33 | 16.48 | 32.00 | ||||||||||||
1945 | 17.90 | 19.29 | 24.45 | 24.86 | a | 38.13 | 41.00 | 50.84 | 51.68 | 40.77 | 35.90 | 25.90 | 15.65 | 32.20 | ||||||||||||
1946 | 14.68 | 19.18 | 26.84 | 35.43 | 33.77 | 47.20 | 53.00 | 50.68 | 43.43 | 32.68 | 21.83 | 23.45 | 33.51 | |||||||||||||
1947 | 16.06 | 14.50 | 18.94 | 27.93 | 36.71 | 43.00 | 52.06 | 51.84 | 46.20 | 37.84 | 19.29 | p | ----- | z | 34.51 | b | ||||||||||
1948 | 13.10 | b | 13.48 | 16.00 | a | 31.00 | 38.03 | 45.87 | 50.61 | 50.65 | 45.67 | 31.97 | 21.70 | 15.81 | 31.16 | |||||||||||
1949 | 5.63 | a | 15.96 | 22.06 | 30.90 | 37.84 | 45.80 | 51.52 | 49.03 | ----- | z | ----- | z | ----- | z | ----- | z | 32.34 | d | |||||||
1950 | ----- | z | ----- | z | 24.67 | v | 27.67 | 35.06 | 47.57 | 49.52 | 47.23 | 42.70 | 39.74 | 22.60 | 22.06 | 37.13 | c | |||||||||
1951 | 13.16 | 20.18 | 18.10 | 28.03 | a | 39.55 | 41.03 | a | 52.77 | 50.71 | 38.29 | b | 32.23 | 21.07 | 15.85 | d | 30.91 | |||||||||
1952 | 19.39 | 18.34 | 17.00 | c | 28.53 | 38.00 | b | 51.38 | a | 52.34 | b | 52.83 | a | 43.93 | c | 33.43 | a | 16.21 | a | 18.90 | 32.52 | |||||
1953 | 23.48 | 13.08 | c | 23.53 | a | 23.24 | a | 33.77 | 48.07 | a | 53.00 | b | 50.23 | 45.76 | a | 35.06 | 25.77 | 16.62 | w | 34.09 | a | |||||
1954 | ----- | z | 23.57 | 17.71 | 32.10 | a | 36.13 | 45.48 | c | 52.93 | b | 50.30 | a | 44.80 | 31.60 | f | 24.10 | 17.42 | 34.45 | b | ||||||
1955 | 8.93 | a | 9.37 | a | 17.24 | b | 28.96 | f | 36.60 | k | 43.19 | c | 54.48 | b | 52.81 | e | 45.21 | f | 34.66 | b | 19.00 | l | 16.33 | s | 31.53 | e |
1956 | 18.58 | 12.97 | 19.93 | a | 24.68 | e | 40.44 | d | 48.65 | d | 50.03 | a | 48.92 | f | 43.52 | e | 32.62 | g | 20.76 | e | 20.39 | 30.00 | b | |||
1957 | 13.16 | 23.89 | 20.29 | 25.10 | 36.29 | 45.18 | b | 52.87 | a | 51.32 | 41.03 | 36.23 | 20.30 | 23.43 | a | 32.42 | ||||||||||
1958 | 18.03 | 22.21 | 16.37 | a | 26.37 | 41.90 | 47.23 | 49.32 | 51.97 | 44.07 | a | 34.66 | b | 23.63 | 21.32 | 33.09 | ||||||||||
1959 | 13.87 | 15.78 | a | 17.48 | b | 26.37 | 38.32 | 48.13 | 49.90 | a | 52.38 | b | 41.03 | 29.68 | 18.80 | 22.15 | d | 31.16 | ||||||||
1960 | 14.41 | b | 8.62 | 20.32 | 29.97 | 36.48 | 45.67 | 51.00 | b | 49.72 | b | 44.04 | f | 34.10 | 22.57 | b | 15.13 | 29.82 | a | |||||||
1961 | 15.35 | 19.29 | 21.00 | 25.15 | c | 36.42 | 46.60 | 49.87 | a | 50.17 | a | 37.30 | 31.33 | a | 18.33 | 10.00 | b | 30.07 | ||||||||
1962 | 7.23 | 15.61 | 17.55 | 29.00 | e | 37.94 | 43.07 | 49.32 | 49.29 | 42.93 | 36.06 | 23.93 | c | 18.43 | c | 30.86 | ||||||||||
1963 | 2.80 | a | 18.42 | b | 19.73 | a | 27.82 | b | 40.32 | 46.40 | 53.21 | b | 51.03 | a | 48.24 | a | 39.04 | g | 25.83 | 15.39 | 31.75 | a | ||||
1964 | 13.71 | 9.28 | 12.84 | ----- | z | 37.58 | ----- | z | 52.39 | ----- | z | 39.54 | b | ----- | z | ----- | z | ----- | z | 27.55 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.09 | 15.20 | 19.07 | 27.60 | 36.78 | 44.95 | 50.74 | 49.66 | 41.90 | 32.39 | 21.38 | 15.96 | 30.70 | |||||||||||||
S.D. | 5.28 | 5.22 | 3.73 | 2.94 | 2.31 | 2.42 | 1.79 | 2.17 | 2.64 | 3.10 | 3.23 | 4.83 | 1.52 | |||||||||||||
SKEW | -0.51 | -0.49 | 0.04 | 0.36 | 0.12 | 0.33 | -0.12 | -0.14 | -0.20 | -0.30 | -0.31 | -0.63 | -0.31 | |||||||||||||
MAX | 23.48 | 23.89 | 27.27 | 35.43 | 42.03 | 51.38 | 54.48 | 54.97 | 48.24 | 39.74 | 29.03 | 23.45 | 33.51 | |||||||||||||
MIN | -1.00 | 4.46 | 10.26 | 19.97 | 32.29 | 40.33 | 46.54 | 44.97 | 35.37 | 25.77 | 12.60 | 3.42 | 26.58 | |||||||||||||
YRS | 51 | 50 | 52 | 50 | 53 | 53 | 54 | 52 | 51 | 47 | 48 | 46 | 35 |