| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.07 | a | 70.97 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.52 | |
| 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 | 35.00 | h | 25.66 | a | 20.37 | a | 23.01 | |
| 1923 | 19.97 | 18.25 | 22.71 | 29.40 | 35.06 | 38.53 | 46.45 | 45.43 | a | 42.07 | b | 33.71 | 29.97 | 20.33 | a | 31.82 | ||||||||||
| 1924 | 18.13 | 26.46 | a | 21.52 | 27.37 | 37.74 | 39.79 | a | 43.42 | 42.77 | a | 39.33 | 32.61 | 27.23 | 17.13 | 31.13 | ||||||||||
| 1925 | 23.19 | 22.57 | 22.35 | 30.10 | 37.23 | 40.73 | 47.16 | 43.29 | 38.27 | 30.84 | 27.60 | 26.52 | 32.49 | |||||||||||||
| 1926 | 24.35 | 26.29 | 27.52 | 34.87 | 35.32 | 42.03 | 44.23 | 43.97 | 33.77 | 35.55 | 32.77 | 21.39 | 33.50 | |||||||||||||
| 1927 | 22.77 | a | 21.39 | 21.61 | 24.30 | 30.87 | 40.53 | o | 46.00 | 44.23 | 38.47 | 31.74 | 31.83 | 20.58 | 30.34 | |||||||||||
| 1928 | 22.29 | 23.62 | 29.32 | 28.00 | 37.68 | ----- | z | 46.26 | 43.10 | 39.47 | 33.23 | 29.30 | 22.94 | 32.29 | ||||||||||||
| 1929 | 15.97 | 14.86 | 21.65 | 24.57 | 33.68 | 38.40 | 44.23 | 43.65 | 36.96 | c | 33.97 | b | 27.67 | 29.32 | 30.41 | |||||||||||
| 1930 | 15.23 | 25.86 | 27.29 | 31.93 | 32.52 | 37.93 | 43.58 | 41.27 | p | 42.12 | v | 32.52 | 27.43 | 22.93 | a | 29.72 | ||||||||||
| 1931 | 22.26 | 24.32 | 27.23 | 31.67 | c | 38.61 | 43.13 | 46.87 | 42.58 | e | ----- | z | 31.91 | t | 20.96 | f | 16.21 | c | 32.54 | |||||||
| 1932 | ----- | z | 12.28 | 24.48 | 25.75 | b | 33.06 | 41.47 | 42.23 | 41.42 | 41.73 | 33.35 | 31.03 | 16.29 | 31.19 | |||||||||||
| 1933 | 13.56 | d | 9.86 | 22.16 | 24.26 | c | 28.62 | b | 37.70 | 45.10 | 46.10 | 36.00 | c | 36.36 | i | 28.13 | 25.68 | 28.83 | ||||||||
| 1934 | 26.90 | 27.23 | b | 32.77 | 33.52 | a | 37.74 | 38.93 | 42.48 | 45.19 | 38.00 | n | 31.60 | a | 28.17 | 22.84 | 33.40 | |||||||||
| 1935 | 18.81 | 21.57 | 13.68 | 25.27 | 30.58 | 38.03 | 41.45 | 44.13 | 39.90 | 31.39 | 20.47 | 22.89 | c | 29.01 | ||||||||||||
| 1936 | 20.42 | 18.66 | 19.23 | 25.24 | a | 34.55 | 39.70 | 42.87 | 42.84 | 36.93 | 33.45 | 26.13 | 20.54 | e | 30.05 | |||||||||||
| 1937 | 3.97 | 16.77 | b | 24.82 | c | 23.86 | a | 30.38 | e | 40.10 | 43.74 | 40.16 | 37.48 | e | 29.83 | a | 28.47 | 23.68 | 28.61 | |||||||
| 1938 | 18.65 | 19.11 | 20.52 | 28.03 | 38.69 | b | 46.53 | 52.16 | 44.84 | 39.20 | 29.93 | a | 22.52 | a | 21.93 | a | 31.84 | |||||||||
| 1939 | 15.78 | d | 15.81 | a | 20.03 | 26.66 | a | 31.74 | 34.43 | 42.48 | 42.90 | 40.13 | 32.72 | f | 28.00 | b | 30.73 | e | 29.88 | |||||||
| 1940 | 26.50 | a | 26.69 | 28.30 | a | 31.47 | 37.42 | 43.10 | 44.38 | e | 43.82 | i | 40.07 | 34.97 | 26.48 | c | 25.82 | c | 33.20 | |||||||
| 1941 | 25.63 | a | 26.85 | a | 27.89 | c | 28.69 | a | 36.16 | 39.07 | 46.93 | d | 44.06 | 36.33 | 31.84 | 30.89 | c | 25.43 | c | 33.31 | ||||||
| 1942 | 21.58 | 18.37 | a | 19.97 | b | 26.97 | 32.39 | 37.10 | 48.28 | f | 45.50 | c | 38.43 | 32.90 | a | 27.64 | b | 24.31 | e | 29.56 | ||||||
| 1943 | 18.57 | c | 23.15 | b | 23.32 | i | 29.77 | d | 31.10 | 36.47 | 42.65 | 39.77 | a | 40.80 | 31.94 | 29.76 | a | 24.21 | c | 31.65 | ||||||
| 1944 | 17.97 | 19.03 | 21.80 | f | 27.07 | 31.74 | d | 37.77 | 43.55 | ----- | z | 38.11 | b | 36.30 | a | 26.64 | b | 26.00 | a | 30.42 | ||||||
| 1945 | 22.48 | 23.86 | 20.03 | 25.40 | 34.81 | 38.80 | 44.87 | 43.23 | 37.10 | 35.23 | 27.87 | 23.61 | 31.44 | |||||||||||||
| 1946 | 18.03 | 19.29 | 23.65 | 27.70 | 34.23 | 37.77 | 44.39 | 43.48 | 36.37 | 29.65 | 26.63 | 26.94 | 30.68 | |||||||||||||
| 1947 | 19.90 | 25.96 | 28.00 | 30.40 | 37.13 | 37.67 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.28 | ||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.52 | 40.10 | 36.77 | 33.19 | 23.52 | a | 15.10 | a | 31.70 | |||||
| 1949 | ----- | z | 11.54 | 14.71 | 28.80 | 36.55 | 37.93 | 41.19 | 39.53 | a | 39.77 | 28.77 | 31.97 | 16.38 | b | 29.74 | ||||||||||
| 1950 | 16.52 | 22.11 | 25.39 | 28.67 | 30.26 | ----- | z | 42.19 | 41.45 | 37.21 | a | 35.07 | b | 30.40 | 29.81 | 30.82 | ||||||||||
| 1951 | 21.48 | 21.43 | 18.45 | 30.97 | 33.65 | 39.07 | a | 42.23 | 40.74 | 38.53 | 32.29 | 27.23 | 19.87 | 30.50 | ||||||||||||
| 1952 | 15.87 | 18.21 | 20.42 | 26.29 | m | 39.33 | y | 37.87 | 45.77 | 42.84 | 42.17 | 37.16 | 24.23 | 21.10 | 30.56 | |||||||||||
| 1953 | 24.06 | 19.86 | 21.90 | 26.33 | 30.23 | 35.20 | 41.90 | 42.77 | a | 42.20 | 33.39 | 32.37 | 25.32 | 31.29 | ||||||||||||
| 1954 | 22.00 | 23.71 | 20.58 | 28.50 | 34.67 | a | 35.47 | 40.42 | 37.19 | 32.20 | 28.77 | 25.70 | 18.74 | 29.00 | ||||||||||||
| 1955 | 12.87 | 11.21 | 14.32 | 16.47 | 24.58 | 33.80 | 33.58 | 39.68 | 36.23 | 34.26 | 25.31 | a | 23.65 | 25.50 | ||||||||||||
| 1956 | 22.80 | a | 17.00 | 21.00 | 20.33 | u | 34.39 | 37.00 | 45.39 | 39.83 | a | 37.57 | 31.00 | 28.00 | t | ----- | z | 31.77 | ||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 19.63 | 20.40 | 22.69 | 27.81 | 33.86 | 39.93 | 44.63 | 42.56 | 38.32 | 32.68 | 27.78 | 22.68 | 30.66 | |||||||||||||
| S.D. | 4.68 | 4.89 | 4.48 | 3.50 | 3.30 | 6.98 | 5.57 | 2.15 | 2.36 | 2.14 | 2.86 | 3.97 | 1.99 | |||||||||||||
| SKEW | -1.11 | -0.48 | 0.03 | -0.72 | -0.58 | 4.06 | 3.14 | -0.51 | -0.34 | 0.02 | -0.33 | -0.04 | -0.91 | |||||||||||||
| MAX | 26.90 | 27.23 | 32.77 | 34.87 | 38.69 | 74.07 | 70.97 | 46.10 | 42.20 | 37.16 | 32.77 | 30.73 | 33.50 | |||||||||||||
| MIN | 3.97 | 9.86 | 13.68 | 16.47 | 24.58 | 33.80 | 33.58 | 37.19 | 32.20 | 28.77 | 20.47 | 15.10 | 25.50 | |||||||||||||
| NO YRS | 31 | 33 | 31 | 31 | 32 | 30 | 33 | 30 | 30 | 30 | 32 | 33 | 16 | |||||||||||||