YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1911 | 34.53 | a | 25.57 | 38.26 | 41.82 | 49.71 | 62.05 | a | 62.48 | a | 61.76 | 59.10 | 41.38 | a | 27.50 | a | 22.50 | a | 43.89 | |||||||
1912 | 28.77 | a | 23.45 | 26.16 | b | 38.64 | a | 48.32 | 54.88 | a | 61.92 | 61.28 | a | 48.75 | 43.52 | a | 35.31 | a | 24.27 | a | 41.27 | |||||
1913 | 21.89 | c | 19.21 | b | 28.57 | c | 41.57 | b | 51.11 | c | 56.28 | 62.80 | c | 64.02 | a | 51.23 | 41.53 | 38.07 | g | 23.33 | e | 41.96 | a | |||
1914 | 31.70 | a | 27.02 | a | 34.97 | 39.81 | a | 51.16 | 59.70 | 61.89 | 62.17 | a | 57.26 | a | 47.42 | a | 39.72 | a | 20.96 | c | 44.48 | |||||
1915 | 23.40 | a | 30.20 | 27.95 | c | 43.98 | 46.80 | a | 55.92 | 61.03 | b | 58.77 | 55.20 | 47.90 | 36.96 | d | 31.77 | c | 43.32 | |||||||
1916 | 23.63 | 33.86 | 40.63 | a | 41.75 | b | 49.65 | e | 58.69 | a | 67.77 | 62.47 | b | 57.08 | 45.62 | a | 34.00 | a | 24.69 | b | 44.99 | |||||
1917 | 24.43 | a | 30.45 | f | 28.86 | c | ----- | z | 43.24 | 57.85 | c | 65.95 | a | 61.37 | a | 58.65 | f | 47.98 | k | 42.55 | a | 32.80 | c | 44.63 | d | |
1918 | 21.76 | h | 32.26 | i | 40.66 | i | 35.96 | b | 51.98 | b | 64.81 | a | 64.03 | a | 65.19 | 52.07 | c | 48.13 | a | 33.95 | i | 28.18 | f | 54.60 | e | |
1919 | 29.85 | a | 25.68 | 33.06 | 40.97 | a | 51.66 | b | 59.93 | c | 67.42 | a | 66.35 | a | 58.43 | a | 41.64 | f | 31.52 | a | 30.34 | b | 45.02 | a | ||
1920 | 33.37 | d | ----- | z | 32.52 | e | 32.83 | 49.17 | g | 60.31 | c | 67.79 | 60.13 | a | 55.34 | b | 45.80 | d | 32.61 | h | 28.43 | j | 48.51 | d | ||
1921 | 28.77 | k | 30.30 | h | 37.54 | h | 37.17 | c | 51.10 | 57.73 | b | 63.90 | a | 63.29 | e | 58.30 | b | 51.91 | c | 39.67 | 35.31 | 50.93 | c | |||
1922 | 22.92 | a | 27.48 | 34.37 | a | 39.07 | a | 50.20 | a | 62.38 | 65.18 | 66.60 | a | 60.88 | b | 47.32 | c | 33.69 | a | 31.79 | 45.16 | |||||
1923 | 32.76 | d | 25.06 | d | 28.88 | c | 41.09 | b | 49.70 | a | 59.36 | a | 65.77 | 61.43 | a | 55.33 | 38.45 | 36.25 | b | 29.45 | c | 43.63 | ||||
1924 | 26.78 | b | 31.87 | b | 24.86 | b | 40.97 | a | 46.76 | 61.67 | a | 65.24 | 66.20 | a | 56.88 | 48.90 | b | 38.28 | 25.28 | a | 44.47 | |||||
1925 | 26.00 | d | 35.83 | a | 39.47 | b | 46.05 | a | 54.02 | 61.20 | 66.37 | a | 61.81 | 57.38 | a | 39.29 | b | 36.28 | a | 27.92 | a | 45.97 | ||||
1926 | 26.66 | f | 34.71 | b | 28.75 | c | 43.13 | d | 50.66 | c | 60.40 | 64.29 | 65.52 | 55.79 | b | 49.11 | i | 36.12 | i | 28.55 | k | 50.41 | d | |||
1927 | 32.04 | h | 33.09 | f | 34.79 | g | 42.88 | f | 54.43 | c | 57.97 | a | 64.13 | 60.00 | 56.05 | a | 49.73 | a | 40.96 | b | 23.24 | l | 54.75 | e | ||
1928 | 33.14 | f | 24.80 | d | 33.89 | i | 38.42 | 52.59 | d | 54.84 | e | 65.74 | 63.48 | a | 57.56 | d | 45.80 | a | 33.12 | d | 27.40 | e | 46.38 | b | ||
1929 | 24.54 | h | 20.37 | e | 33.14 | c | 41.73 | d | 49.85 | e | 60.79 | k | 66.71 | c | 65.40 | 54.38 | a | 46.19 | 29.35 | c | 32.50 | b | 43.96 | b | ||
1930 | 16.07 | a | 35.25 | 30.95 | 48.93 | 48.18 | 61.82 | 65.98 | 63.18 | 56.16 | b | 45.13 | a | 35.18 | 27.25 | a | 44.51 | |||||||||
1931 | 29.14 | b | 32.11 | 29.75 | c | 40.97 | 48.57 | a | 64.67 | 68.32 | 65.24 | 62.72 | a | 48.93 | a | 33.57 | a | 31.60 | 46.30 | |||||||
1932 | 23.63 | a | 33.33 | b | 26.17 | g | 41.50 | f | 52.85 | a | 57.98 | 68.35 | 64.47 | 57.62 | 45.09 | d | 39.40 | a | 20.13 | a | 46.29 | b | ||||
1933 | 28.52 | b | 23.92 | d | 36.86 | j | 39.48 | d | 49.33 | a | 64.26 | a | 67.95 | 63.48 | b | 61.14 | b | 50.52 | 39.24 | a | 37.93 | d | 47.80 | a | ||
1934 | 33.08 | a | 32.20 | 39.17 | d | 46.41 | c | 59.36 | b | 64.18 | 71.23 | 68.37 | 56.78 | e | 52.45 | b | 39.03 | a | 31.20 | c | 49.45 | |||||
1935 | 29.73 | g | 31.30 | e | 37.09 | b | 40.98 | i | 45.27 | c | 60.16 | a | 67.90 | 65.98 | 58.83 | c | 47.60 | a | 35.22 | a | 29.93 | d | 47.93 | b | ||
1936 | 25.85 | d | 24.04 | c | 35.86 | c | 45.43 | c | 54.53 | a | 64.42 | 70.12 | a | 66.16 | 59.04 | c | 46.67 | d | 36.93 | c | 32.38 | b | 46.78 | |||
1937 | 18.47 | a | 29.85 | d | 32.64 | b | 42.25 | b | 53.32 | a | 60.40 | a | 67.81 | 70.19 | 60.10 | a | 50.52 | 36.59 | b | 30.40 | e | 46.04 | ||||
1938 | 28.50 | b | 32.52 | b | 38.20 | f | 43.31 | c | 48.00 | a | 60.33 | a | 65.82 | 68.40 | 57.98 | a | 49.79 | 31.57 | 30.52 | a | 46.98 | a | ||||
1939 | 27.78 | a | 21.50 | 36.74 | 43.32 | 54.73 | 61.97 | 69.73 | 65.45 | 61.60 | 49.50 | 38.57 | 35.78 | a | 47.22 | |||||||||||
1940 | 21.77 | 30.03 | 37.37 | 41.90 | 52.68 | 61.92 | 67.98 | 65.34 | 59.90 | 51.93 | a | 36.67 | 33.71 | b | 46.77 | |||||||||||
1941 | 31.15 | 33.35 | a | 35.20 | a | 39.88 | 53.97 | a | 58.68 | 64.60 | 63.85 | 55.31 | a | 45.43 | a | 39.18 | 30.08 | 45.89 | ||||||||
1942 | 28.40 | 18.98 | 31.00 | ----- | z | 51.30 | a | 58.16 | b | 65.18 | 64.55 | 58.42 | ----- | z | 38.90 | 34.42 | 44.93 | b | ||||||||
1943 | 29.60 | 36.38 | c | 31.16 | 48.47 | a | 47.63 | 60.82 | 69.11 | 68.58 | 59.12 | 49.60 | 38.43 | 32.53 | 47.62 | |||||||||||
1944 | 30.79 | 29.14 | 30.93 | a | 38.35 | 52.55 | 60.62 | 65.79 | 67.55 | 60.30 | 51.11 | 38.43 | a | 31.44 | 46.42 | |||||||||||
1945 | 30.65 | 31.70 | 37.97 | 37.41 | a | 52.11 | 55.57 | 65.26 | 64.92 | 55.07 | 51.35 | 39.47 | 28.13 | 45.80 | ||||||||||||
1946 | 28.50 | 32.93 | 40.61 | 49.77 | 46.63 | 62.53 | 68.06 | 65.05 | 58.58 | 46.10 | 35.43 | 35.98 | 47.52 | |||||||||||||
1947 | 28.48 | 28.16 | 32.71 | 40.93 | 50.84 | 56.80 | 66.39 | 66.19 | 61.65 | 52.29 | 32.00 | q | ----- | z | 48.44 | b | ||||||||||
1948 | 25.93 | b | 26.41 | 29.47 | a | 45.63 | 52.15 | 59.95 | 66.71 | 66.24 | 62.43 | 48.98 | 34.42 | 28.95 | 45.61 | |||||||||||
1949 | 18.80 | a | 29.12 | 35.34 | 43.77 | 51.73 | 58.85 | 66.08 | 65.55 | ----- | z | ----- | z | ----- | z | ----- | z | 46.15 | d | |||||||
1950 | ----- | z | ----- | z | 40.00 | v | 43.62 | 50.60 | 63.22 | 64.52 | 65.06 | 56.98 | 57.29 | 37.72 | 37.27 | 52.92 | c | |||||||||
1951 | 27.15 | 34.39 | 33.19 | 41.07 | a | 53.63 | 56.00 | a | 69.31 | 66.08 | 57.38 | b | 47.31 | 36.20 | 29.31 | e | 45.92 | |||||||||
1952 | 32.71 | 32.12 | 31.43 | c | 43.95 | 52.81 | b | 68.16 | a | 69.22 | b | 69.20 | a | 61.68 | e | 51.73 | a | 29.68 | b | 32.34 | 47.92 | |||||
1953 | 37.24 | 29.94 | c | 39.31 | b | 39.16 | b | 48.42 | 64.31 | a | 68.41 | b | 64.55 | 62.43 | b | 50.69 | 39.97 | 31.00 | x | 49.49 | a | |||||
1954 | ----- | z | 40.30 | 31.92 | 48.79 | b | 51.55 | 63.70 | e | 70.59 | b | 66.53 | a | 61.62 | 48.62 | f | 40.80 | 34.10 | a | 50.99 | b | |||||
1955 | 25.48 | a | 25.52 | b | 33.41 | b | 44.17 | f | 51.33 | k | 58.11 | c | 70.14 | b | 68.10 | e | 60.69 | f | 51.64 | b | 33.85 | m | 31.38 | s | 47.49 | e |
1956 | 32.31 | 26.62 | 35.55 | a | 40.08 | e | 55.17 | d | 66.29 | d | 67.27 | c | 63.68 | f | 61.20 | e | 49.62 | g | 35.74 | e | 33.68 | 45.39 | b | |||
1957 | 26.55 | 37.86 | 33.76 | 37.22 | 48.02 | 59.82 | b | 66.70 | a | 65.18 | 57.03 | a | 48.53 | 31.35 | 36.87 | a | 45.74 | |||||||||
1958 | 31.02 | 35.07 | 27.30 | a | 39.88 | 56.60 | 61.58 | 63.97 | 68.16 | 60.40 | a | 50.90 | b | 39.08 | 34.27 | 47.35 | ||||||||||
1959 | 27.94 | 28.07 | a | 32.28 | b | 41.48 | 51.79 | 63.62 | 67.35 | a | 68.21 | b | 56.85 | 43.87 | 35.83 | 35.56 | d | 46.07 | ||||||||
1960 | 28.54 | c | 21.81 | 35.08 | 45.30 | 52.18 | 62.05 | 67.24 | b | 67.57 | b | 59.46 | g | 48.05 | 37.61 | b | 28.52 | 44.90 | a | |||||||
1961 | 31.06 | 32.80 | 33.27 | 39.57 | c | 50.68 | 61.38 | 64.47 | a | 64.58 | a | 51.83 | 46.72 | a | 32.33 | 23.68 | c | 44.37 | ||||||||
1962 | 22.50 | 30.68 | 31.79 | 43.44 | e | 54.18 | 58.25 | 65.18 | a | 66.69 | 59.35 | 52.84 | 40.35 | c | 35.07 | c | 46.69 | |||||||||
1963 | 19.24 | b | 34.52 | b | 35.38 | a | 45.52 | b | 56.94 | 63.55 | 70.26 | b | 65.50 | a | 62.72 | a | 54.88 | g | 40.82 | 29.58 | 47.64 | a | ||||
1964 | 27.73 | 24.12 | 27.95 | ----- | z | 53.27 | ----- | z | 70.44 | ----- | z | 57.62 | b | ----- | z | ----- | z | ----- | z | 43.52 | f | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.44 | 29.40 | 33.17 | 41.92 | 51.24 | 60.58 | 66.55 | 65.03 | 57.94 | 48.03 | 36.50 | 30.51 | 45.76 | |||||||||||||
S.D. | 4.57 | 5.05 | 3.92 | 3.55 | 3.04 | 3.01 | 2.41 | 2.50 | 3.09 | 3.72 | 3.42 | 4.42 | 1.64 | |||||||||||||
SKEW | -0.42 | -0.20 | 0.05 | 0.15 | -0.05 | 0.09 | -0.15 | -0.37 | -0.65 | -0.43 | -0.66 | -0.53 | -0.40 | |||||||||||||
MAX | 37.24 | 40.30 | 40.63 | 49.77 | 59.36 | 68.16 | 71.23 | 70.19 | 62.72 | 57.29 | 42.55 | 37.93 | 49.45 | |||||||||||||
MIN | 16.07 | 18.98 | 24.86 | 32.83 | 43.24 | 54.84 | 61.03 | 58.77 | 48.75 | 38.45 | 27.50 | 20.13 | 41.27 | |||||||||||||
YRS | 45 | 48 | 46 | 47 | 52 | 52 | 54 | 52 | 50 | 45 | 46 | 45 | 29 |