| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1916 | ----- | z | ----- | z | ----- | z | 55.13 | 56.71 | 65.42 | 68.08 | 73.16 | 65.52 | 54.56 | 38.97 | 35.52 | 57.01 | ||||||||||
| 1917 | 36.02 | 39.80 | 41.94 | 49.80 | 57.69 | 65.13 | 75.92 | 76.76 | 66.85 | 58.32 | 45.43 | 45.89 | 54.96 | |||||||||||||
| 1918 | 42.98 | 38.39 | 46.23 | 55.60 | 58.05 | 71.95 | 73.69 | 70.18 | 69.98 | 57.81 | 43.93 | 38.27 | 55.59 | |||||||||||||
| 1919 | 34.89 | 39.84 | 47.29 | 54.38 | 59.00 | 64.30 | 73.77 | 73.24 | 63.10 | 51.74 | 42.08 | 22.10 | 52.14 | |||||||||||||
| 1920 | 34.24 | 40.14 | 45.76 | 49.40 | 57.21 | 64.75 | 73.55 | 73.77 | 62.78 | 52.15 | 42.57 | 40.19 | 53.04 | |||||||||||||
| 1921 | 38.19 | 41.36 | 47.81 | 52.32 | 60.50 | a | 67.87 | 71.23 | 72.40 | 61.27 | 56.18 | 42.80 | 32.71 | 53.72 | ||||||||||||
| 1922 | 27.34 | 35.52 | 43.18 | 49.55 | 59.11 | 71.10 | i | 74.85 | 72.77 | 67.68 | 60.11 | 49.77 | 33.68 | 52.14 | ||||||||||||
| 1923 | 40.10 | 34.71 | 48.06 | 53.83 | 59.89 | 64.92 | 74.18 | 75.95 | 68.35 | 54.52 | 46.87 | 37.92 | 54.94 | |||||||||||||
| 1924 | 31.52 | 45.24 | 48.02 | 55.45 | 66.03 | 67.62 | 72.97 | 72.42 | 64.82 | 53.85 | 42.07 | 28.44 | 54.04 | |||||||||||||
| 1925 | 40.06 | 45.21 | 48.27 | 55.88 | 62.18 | 67.23 | 76.58 | 70.76 | 65.60 | 56.73 | 45.95 | 45.40 | 56.66 | |||||||||||||
| 1926 | 43.82 | 47.55 | 52.45 | 59.27 | 60.24 | 71.87 | 76.13 | 73.39 | 61.27 | 56.08 | 44.90 | 36.73 | 56.97 | |||||||||||||
| 1927 | 28.97 | 41.89 | 46.81 | 53.52 | 59.40 | 70.26 | a | 76.48 | 75.10 | 63.83 | 56.34 | 48.68 | 34.56 | 54.65 | ||||||||||||
| 1928 | 32.27 | 40.28 | 49.18 | 53.00 | 66.45 | 68.03 | 76.29 | 73.63 | 67.00 | 56.00 | a | 44.38 | 35.48 | a | 55.17 | |||||||||||
| 1929 | 28.82 | 29.66 | 50.31 | 53.12 | 63.63 | 67.88 | 73.61 | 76.34 | 64.58 | 56.79 | 41.82 | 40.97 | 53.96 | |||||||||||||
| 1930 | 17.40 | b | 43.12 | 49.63 | 58.30 | 59.31 | 64.60 | 73.90 | 75.56 | 66.43 | 52.90 | 43.28 | 36.71 | 53.43 | ||||||||||||
| 1931 | 37.87 | 41.09 | 46.73 | 54.95 | 64.90 | 66.68 | 75.26 | 73.71 | 65.55 | 54.98 | 40.43 | 31.05 | a | 54.43 | ||||||||||||
| 1932 | 35.28 | a | 36.95 | 43.06 | g | 52.58 | 61.90 | a | 70.38 | 70.26 | 72.82 | 68.22 | 57.95 | 46.47 | 32.35 | 55.02 | ||||||||||
| 1933 | 36.69 | 33.61 | 46.02 | 52.98 | 57.21 | b | 68.78 | 74.79 | 73.50 | 60.43 | 56.61 | 45.07 | 42.86 | b | 54.05 | |||||||||||
| 1934 | 43.00 | 45.18 | f | 51.18 | i | 59.78 | 62.05 | a | 68.03 | 71.94 | 74.50 | 64.06 | c | 56.83 | h | 48.29 | r | 39.90 | f | 63.34 | ||||||
| 1935 | 35.22 | m | 40.54 | 42.98 | b | 51.25 | 60.15 | a | 67.50 | m | 67.23 | p | 72.26 | b | 68.52 | 52.89 | 38.57 | 36.40 | f | 53.39 | ||||||
| 1936 | 37.33 | v | 25.16 | 46.05 | 57.08 | 63.55 | 67.58 | 72.55 | a | 74.71 | b | 64.88 | 56.45 | 36.33 | 40.15 | 54.95 | ||||||||||
| 1937 | 18.63 | a | 33.66 | 47.68 | 50.85 | 60.02 | 67.78 | 74.02 | 69.84 | 66.52 | 58.08 | 45.83 | a | 39.81 | 52.73 | |||||||||||
| 1938 | 37.76 | 37.84 | 45.50 | 55.65 | 60.27 | i | 67.48 | 76.02 | 68.29 | 67.76 | a | 52.63 | 39.27 | 37.22 | a | 53.22 | ||||||||||
| 1939 | 38.35 | 38.52 | a | 48.61 | 54.08 | 61.45 | 62.90 | 71.95 | 72.79 | 66.38 | 55.42 | 42.52 | 40.15 | a | 54.43 | |||||||||||
| 1940 | 33.31 | 42.09 | 51.02 | 55.98 | 64.03 | 71.30 | 73.37 | 73.53 | 68.57 | 57.63 | 39.83 | 35.35 | 55.50 | |||||||||||||
| 1941 | 35.08 | a | 40.59 | 50.34 | 56.05 | 60.19 | 67.30 | 76.53 | b | 72.97 | 62.55 | 54.03 | 43.30 | 39.15 | 54.84 | |||||||||||
| 1942 | 26.34 | 39.45 | 45.50 | 54.00 | 57.98 | 64.10 | 75.11 | 73.56 | 67.78 | 55.98 | 41.30 | 39.31 | 53.37 | |||||||||||||
| 1943 | 27.03 | 39.07 | 44.19 | 54.70 | 57.61 | 64.17 | 73.10 | 69.73 | 67.18 | 55.08 | 42.73 | 36.35 | 52.58 | |||||||||||||
| 1944 | 34.50 | 38.84 | 44.47 | 52.18 | 59.65 | 63.93 | 72.44 | 70.65 | 66.82 | 58.79 | 43.72 | 34.95 | 53.41 | |||||||||||||
| 1945 | 40.27 | 41.79 | 44.73 | 53.92 | 63.45 | 67.70 | 75.87 | 75.05 | 64.32 | 57.37 | 44.08 | 36.53 | 55.42 | |||||||||||||
| 1946 | 39.29 | 41.36 | 46.10 | 52.98 | 61.13 | 64.75 | 71.29 | 72.40 | 65.83 | 51.84 | 39.97 | 39.63 | 53.88 | |||||||||||||
| 1947 | 32.87 | 42.89 | 50.16 | 56.32 | 64.71 | 64.35 | 70.58 | 69.89 | 67.07 | 55.35 | 45.65 | 41.39 | 55.10 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.75 | a | 67.82 | a | 64.24 | a | 52.71 | 43.78 | 33.44 | 54.96 | ||||
| 1949 | 22.11 | 36.04 | 45.98 | 56.50 | 62.95 | 66.72 | 71.68 | 72.48 | 68.80 | 48.98 | 47.17 | 39.81 | 53.27 | |||||||||||||
| 1950 | 21.10 | 31.12 | 43.68 | 50.42 | 58.08 | 65.30 | 72.84 | 74.58 | 67.72 | 51.90 | 43.27 | 39.71 | 51.64 | |||||||||||||
| 1951 | 35.45 | 38.41 | 42.08 | 54.78 | 59.71 | 67.42 | 71.81 | 70.06 | 65.62 | 51.93 | q | 42.75 | 34.94 | 53.00 | ||||||||||||
| 1952 | 28.68 | 39.41 | 44.95 | 54.22 | 61.44 | 64.78 | g | 75.23 | 73.94 | 69.60 | 60.48 | 36.82 | 36.52 | 52.84 | ||||||||||||
| 1953 | 44.47 | 43.21 | 46.50 | 51.05 | s | 57.11 | 61.63 | 72.53 | 71.26 | 66.88 | 55.48 | 45.28 | 41.45 | 55.07 | ||||||||||||
| 1954 | 32.03 | 39.59 | 42.92 | 52.00 | 60.42 | 62.57 | 69.44 | 68.69 | 65.70 | 52.29 | 48.95 | 36.44 | 52.59 | |||||||||||||
| 1955 | 37.69 | 39.62 | 41.23 | 48.38 | 57.74 | 66.67 | 68.24 | 73.00 | 65.80 | 54.63 | 37.63 | 35.68 | 52.19 | |||||||||||||
| 1956 | 35.82 | 31.64 | 45.61 | 55.50 | a | 63.77 | 63.87 | 73.92 | 71.68 | 66.07 | 52.69 | 41.45 | 37.79 | 53.32 | ||||||||||||
| 1957 | 21.60 | 37.46 | 45.34 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.80 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 33.47 | 38.79 | 46.40 | 53.99 | 60.68 | 66.57 | 73.24 | 72.66 | 65.90 | 55.24 | 43.14 | 37.09 | 54.07 | |||||||||||||
| S.D. | 7.01 | 4.45 | 2.67 | 2.63 | 2.65 | 2.56 | 2.38 | 2.16 | 2.26 | 2.54 | 3.21 | 4.39 | 1.31 | |||||||||||||
| SKEW | -0.62 | -0.88 | 0.15 | -0.06 | 0.43 | 0.31 | -0.60 | -0.33 | -0.51 | -0.11 | -0.13 | -0.86 | 0.24 | |||||||||||||
| MAX | 44.47 | 47.55 | 52.45 | 59.78 | 66.45 | 71.95 | 76.58 | 76.76 | 69.98 | 60.48 | 49.77 | 45.89 | 56.97 | |||||||||||||
| MIN | 17.40 | 25.16 | 41.23 | 48.38 | 56.71 | 61.63 | 67.75 | 67.82 | 60.43 | 48.98 | 36.33 | 22.10 | 51.64 | |||||||||||||
| NO YRS | 38 | 39 | 38 | 39 | 39 | 37 | 40 | 41 | 41 | 39 | 40 | 39 | 30 | |||||||||||||