| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1916 | ----- | z | ----- | z | ----- | z | 44.37 | 47.00 | 53.63 | 57.87 | 60.23 | 52.90 | 41.13 | 31.60 | 29.87 | 46.51 | ||||||||||
| 1917 | 29.61 | 32.64 | 33.35 | 41.10 | 49.00 | 53.73 | 62.35 | 62.10 | 55.27 | 44.42 | 37.20 | 40.29 | 45.09 | |||||||||||||
| 1918 | 37.52 | 31.36 | 36.48 | 45.03 | 47.42 | 58.13 | 60.74 | 58.13 | 56.33 | 48.19 | 36.03 | 32.55 | 45.66 | |||||||||||||
| 1919 | 26.29 | 33.29 | 37.68 | 42.90 | 47.61 | 52.47 | 60.16 | 60.13 | 51.27 | 41.19 | 35.13 | 15.52 | 41.97 | |||||||||||||
| 1920 | 28.97 | 30.52 | 37.23 | 40.20 | 45.65 | 53.80 | 61.48 | 60.68 | 51.90 | 43.94 | 33.50 | 33.39 | 43.44 | |||||||||||||
| 1921 | 31.00 | 33.71 | 38.94 | 40.80 | 48.55 | 56.73 | 58.29 | 59.81 | 49.53 | 44.23 | 34.00 | 26.00 | 43.47 | |||||||||||||
| 1922 | 20.00 | 27.25 | 34.39 | 40.00 | 46.29 | 58.20 | 61.19 | 60.58 | 52.47 | 46.16 | 35.80 | 23.77 | 42.18 | |||||||||||||
| 1923 | 34.03 | 26.18 | 37.65 | 44.13 | 49.03 | 52.50 | 62.35 | 62.65 | 54.23 | 43.71 | 38.33 | 31.52 | 44.69 | |||||||||||||
| 1924 | 24.68 | 37.17 | 38.42 | 43.20 | 51.90 | 53.87 | 61.00 | 60.55 | 51.53 | 44.52 | 36.33 | 20.94 | 43.68 | |||||||||||||
| 1925 | 33.55 | 37.79 | 38.45 | 45.17 | 50.77 | 55.83 | 63.71 | 58.16 | 54.33 | 45.29 | 36.77 | 35.71 | 46.29 | |||||||||||||
| 1926 | 34.13 | 37.89 | 39.32 | 46.70 | 49.00 | 59.70 | 63.52 | 61.35 | 49.70 | 43.48 | 29.77 | 23.03 | 44.80 | |||||||||||||
| 1927 | 21.16 | 34.82 | 37.52 | 40.77 | 47.39 | 57.86 | a | 61.58 | 61.71 | 51.93 | 45.84 | 40.50 | 25.65 | 43.89 | ||||||||||||
| 1928 | 26.45 | 30.66 | 39.90 | 41.37 | 51.10 | 55.63 | 62.39 | 59.58 | 53.30 | 44.77 | a | 36.93 | 30.03 | a | 44.34 | |||||||||||
| 1929 | 22.65 | 18.46 | 39.58 | 40.33 | 48.06 | 54.07 | 57.90 | 62.00 | 50.80 | 42.97 | 29.57 | 34.52 | 41.74 | |||||||||||||
| 1930 | 9.71 | 34.96 | 39.29 | 46.70 | 48.77 | 52.87 | 61.16 | 62.55 | 54.63 | 42.26 | 36.10 | 33.00 | 43.50 | |||||||||||||
| 1931 | 33.32 | 33.25 | 37.61 | 43.37 | 51.94 | 55.80 | 61.16 | 60.06 | 54.53 | 43.35 | 32.67 | 26.20 | a | 44.44 | ||||||||||||
| 1932 | 29.03 | a | 29.17 | 39.59 | d | 43.60 | 49.87 | a | 56.17 | 57.29 | 59.65 | 52.13 | 46.84 | 39.13 | 24.71 | 43.93 | ||||||||||
| 1933 | 29.32 | 25.29 | 36.19 | 38.10 | 44.93 | b | 54.40 | 59.55 | 59.45 | 49.13 | 43.71 | 36.67 | 37.21 | b | 42.83 | |||||||||||
| 1934 | 35.61 | 35.91 | f | 39.50 | i | 46.10 | 50.00 | a | 56.47 | 59.90 | 60.87 | 51.25 | b | 45.37 | d | 40.62 | i | 34.07 | d | 48.85 | ||||||
| 1935 | 29.92 | g | 31.75 | 33.59 | b | 39.20 | 47.35 | 54.44 | l | 59.43 | c | 57.50 | a | 54.07 | 41.48 | 30.37 | 31.74 | d | 42.65 | |||||||
| 1936 | 32.17 | h | 18.00 | 36.61 | 46.03 | 51.39 | 57.07 | 61.73 | a | 62.10 | b | 51.03 | 41.84 | 24.73 | 31.77 | 43.85 | ||||||||||
| 1937 | 9.23 | a | 24.68 | 38.00 | 41.77 | 48.32 | 55.50 | 61.29 | 57.74 | 54.83 | 45.39 | 39.30 | 34.35 | 42.53 | ||||||||||||
| 1938 | 32.77 | 31.96 | 36.39 | 44.00 | 47.58 | e | 57.57 | 63.29 | 57.16 | 55.34 | a | 42.32 | 31.47 | 29.26 | 44.09 | |||||||||||
| 1939 | 30.87 | 31.79 | 39.06 | 43.73 | 50.65 | 54.80 | 61.32 | 58.06 | 52.30 | 43.52 | 29.80 | 33.27 | a | 44.10 | ||||||||||||
| 1940 | 27.39 | 35.10 | 40.55 | 46.20 | 51.29 | 58.37 | 62.68 | 60.48 | 57.00 | 47.03 | 32.23 | 28.74 | 45.59 | |||||||||||||
| 1941 | 30.23 | a | 31.32 | 36.74 | 44.67 | 49.13 | 55.73 | 65.06 | 61.29 | 52.37 | 45.10 | 34.33 | 31.81 | 44.82 | ||||||||||||
| 1942 | 20.65 | 31.39 | 32.42 | 41.90 | 46.77 | 54.30 | 62.29 | 58.68 | 52.63 | 42.29 | 34.83 | 33.48 | 42.64 | |||||||||||||
| 1943 | 19.97 | 31.71 | 33.23 | 43.30 | 46.77 | 53.33 | 60.74 | 58.00 | 51.27 | 43.42 | 36.03 | 29.84 | 42.30 | |||||||||||||
| 1944 | 27.77 | 29.90 | 32.48 | 41.00 | 47.61 | 53.80 | 60.71 | 58.61 | 52.33 | 44.94 | 36.23 | 30.94 | 43.03 | |||||||||||||
| 1945 | 34.74 | 33.96 | 35.74 | 41.87 | 51.35 | 54.60 | 61.19 | 60.90 | 50.20 | 43.42 | 35.13 | 29.39 | 44.38 | |||||||||||||
| 1946 | 30.35 | 31.89 | 36.16 | 41.53 | 47.58 | 54.13 | 57.42 | 58.10 | 53.03 | 42.06 | 31.10 | 33.39 | 43.06 | |||||||||||||
| 1947 | 25.32 | 33.50 | 38.77 | 45.43 | 50.97 | 54.47 | 59.39 | 57.81 | 54.23 | 47.00 | 39.50 | 33.03 | 44.95 | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.43 | a | 56.55 | 51.13 | 40.94 | 36.43 | 27.29 | 44.96 | ||||||
| 1949 | 12.74 | 28.32 | 37.90 | 44.37 | 52.00 | 54.87 | 60.00 | 60.32 | 54.23 | 39.97 | 38.73 | 33.35 | 43.07 | |||||||||||||
| 1950 | 14.58 | 23.07 | 35.97 | 40.30 | 46.90 | 54.60 | 60.03 | 60.10 | 51.50 | 42.71 | 35.83 | 34.97 | 41.71 | |||||||||||||
| 1951 | 28.68 | 30.07 | 33.13 | 40.60 | 46.77 | 53.83 | 56.87 | 55.10 | 49.40 | 44.29 | q | 35.60 | 29.48 | 41.78 | ||||||||||||
| 1952 | 23.97 | 31.24 | 36.26 | 41.07 | 49.87 | 55.47 | 61.03 | 60.74 | 53.77 | 44.97 | 28.17 | 31.16 | 43.14 | |||||||||||||
| 1953 | 37.19 | 34.61 | 36.77 | 40.87 | 46.42 | 52.47 | 59.19 | 58.71 | 52.37 | 42.26 | 36.13 | 33.48 | 44.21 | |||||||||||||
| 1954 | 24.16 | 33.68 | 31.61 | 41.43 | 49.06 | 52.93 | 58.29 | 58.77 | 53.47 | 41.03 | 41.93 | 30.61 | 43.08 | |||||||||||||
| 1955 | 32.94 | 31.43 | 33.19 | 40.07 | 47.87 | 56.63 | 58.45 | 59.65 | 53.77 | 45.06 | 32.33 | 30.94 | 43.53 | |||||||||||||
| 1956 | 30.94 | 25.31 | 37.26 | 44.53 | 52.23 | 53.17 | 60.39 | 59.35 | 52.33 | 42.26 | 34.00 | 31.39 | 43.60 | |||||||||||||
| 1957 | 14.19 | 28.93 | 37.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.79 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 26.73 | 30.72 | 36.68 | 42.69 | 48.80 | 55.12 | 60.53 | 59.66 | 52.68 | 43.76 | 34.76 | 30.53 | 43.71 | |||||||||||||
| S.D. | 7.43 | 4.54 | 2.36 | 2.27 | 1.97 | 1.85 | 1.94 | 1.72 | 1.88 | 1.93 | 3.60 | 4.58 | 1.13 | |||||||||||||
| SKEW | -0.80 | -1.03 | -0.53 | 0.13 | 0.17 | 0.59 | -0.04 | -0.33 | 0.13 | 0.21 | -0.50 | -0.98 | 0.18 | |||||||||||||
| MAX | 37.52 | 37.89 | 40.55 | 46.70 | 52.23 | 59.70 | 65.06 | 62.65 | 57.00 | 48.19 | 41.93 | 40.29 | 46.29 | |||||||||||||
| MIN | 9.23 | 18.00 | 31.61 | 38.10 | 44.93 | 52.47 | 56.87 | 55.10 | 49.13 | 39.97 | 24.73 | 15.52 | 41.71 | |||||||||||||
| NO YRS | 38 | 39 | 39 | 40 | 40 | 39 | 41 | 41 | 41 | 40 | 40 | 41 | 35 | |||||||||||||