YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1908 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.58 | 20.58 | k | |
1910 | 25.81 | 27.36 | 46.42 | 50.37 | 54.77 | 68.83 | 73.48 | 71.23 | 66.37 | 55.16 | 44.00 | 30.35 | 51.18 | |||||||||||||
1911 | 30.87 | 29.68 | 38.52 | 45.80 | 58.00 | 66.73 | 67.29 | 69.10 | 64.33 | 50.13 | 32.63 | 24.84 | 48.16 | |||||||||||||
1912 | 27.94 | 26.14 | 35.42 | 40.57 | 52.74 | 61.93 | 67.29 | 68.23 | 54.93 | 50.16 | 39.27 | 22.61 | 45.60 | |||||||||||||
1913 | 24.94 | 26.75 | 31.00 | 46.03 | 59.77 | 66.13 | 69.35 | 74.00 | 59.63 | 47.35 | 42.53 | 26.55 | 47.84 | |||||||||||||
1914 | 30.52 | 30.15 | a | 37.00 | 46.37 | 56.48 | 66.47 | 69.93 | a | 69.03 | 65.03 | 52.10 | 46.07 | 24.94 | 49.51 | |||||||||||
1915 | 25.29 | 32.00 | 32.68 | 49.07 | 53.90 | 62.97 | 70.61 | 68.68 | 61.87 | 53.84 | 37.47 | 29.23 | 48.13 | |||||||||||||
1916 | 26.29 | 34.24 | 39.74 | 46.07 | 56.06 | 66.93 | 70.94 | 67.58 | 62.03 | 50.39 | 37.76 | a | 22.97 | a | 48.42 | |||||||||||
1917 | 23.94 | 28.64 | 28.39 | 40.70 | 49.03 | 65.43 | 72.35 | 67.32 | 64.33 | 50.16 | 42.83 | 32.16 | 47.11 | |||||||||||||
1918 | 21.23 | 31.25 | 41.45 | 39.13 | 55.71 | 70.27 | 69.87 | 70.06 | 61.17 | 51.77 | 33.40 | 27.71 | 47.75 | |||||||||||||
1919 | 28.00 | 26.04 | 36.26 | 47.03 | 59.13 | 67.70 | 74.19 | 72.10 | 65.83 | 45.71 | 36.90 | 30.68 | 49.13 | |||||||||||||
1920 | 33.71 | 31.21 | 33.16 | 35.69 | a | 56.35 | 64.57 | 71.77 | 66.39 | 62.47 | 52.39 | 35.30 | 26.10 | 47.43 | ||||||||||||
1921 | 30.52 | 31.71 | 40.35 | 41.80 | 56.87 | a | 69.48 | g | 71.58 | 68.10 | 66.70 | 55.13 | 42.13 | 36.29 | 49.20 | a | ||||||||||
1922 | 24.84 | 28.43 | 36.39 | 42.97 | 55.32 | 69.96 | d | 70.87 | 72.32 | 66.97 | 54.42 | 37.77 | 28.29 | 49.05 | ||||||||||||
1923 | 30.90 | 28.07 | 29.84 | 42.33 | 56.16 | 65.93 | 71.90 | 66.52 | 60.57 | 46.65 | 40.33 | 30.81 | 47.50 | |||||||||||||
1924 | 23.68 | 33.24 | 28.00 | 41.87 | 53.90 | a | 68.17 | 71.39 | 72.03 | 63.43 | 52.42 | 40.30 | 26.29 | 47.89 | ||||||||||||
1925 | 25.07 | a | 31.96 | 39.45 | 50.17 | 59.55 | 64.40 | 70.68 | 66.45 | 62.63 | 47.97 | 37.57 | 28.71 | 48.72 | ||||||||||||
1926 | 24.55 | 32.00 | 34.61 | 47.10 | 55.48 | 66.53 | 68.90 | 71.32 | 64.67 | 54.45 | 36.38 | a | 26.16 | 48.51 | ||||||||||||
1927 | 32.10 | 31.36 | 34.16 | 44.70 | 57.50 | a | 64.43 | 70.45 | 65.35 | 61.60 | 53.84 | 39.97 | 22.61 | 48.17 | ||||||||||||
1928 | 30.68 | 29.83 | 36.52 | 41.10 | 57.71 | 61.17 | 71.77 | 69.16 | 65.60 | 53.10 | 36.80 | ----- | z | 50.31 | a | |||||||||||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.13 | 70.68 | 60.90 | 51.77 | 32.17 | 33.19 | 53.47 | f | ||||||
1930 | 22.48 | 34.79 | 31.00 | 51.00 | 55.03 | 67.97 | 71.77 | 69.07 | a | 62.75 | b | 50.96 | d | 41.23 | 28.42 | 48.87 | ||||||||||
1931 | 30.61 | 36.04 | 35.77 | 48.73 | 51.57 | c | 68.73 | 75.61 | 68.60 | a | 65.07 | 55.32 | 39.37 | 31.13 | 50.55 | |||||||||||
1932 | 22.71 | 35.14 | 32.06 | 47.47 | 59.63 | a | 66.52 | a | 73.16 | 72.29 | c | 67.20 | 51.90 | 42.10 | 25.90 | 49.67 | ||||||||||
1933 | 28.32 | 25.14 | 39.10 | 41.97 | 53.20 | a | 71.93 | a | 75.32 | 72.00 | d | 69.73 | 61.23 | 45.93 | 38.61 | 51.87 | ||||||||||
1934 | 33.55 | 39.86 | 43.23 | 54.13 | 66.70 | a | 72.41 | a | 78.24 | b | 75.31 | b | 65.57 | 59.94 | 40.87 | 32.68 | 55.21 | |||||||||
1935 | 35.60 | a | 37.18 | 40.03 | a | 46.34 | a | 52.68 | 69.86 | a | 75.07 | a | 74.21 | b | 68.14 | b | 52.20 | a | 38.62 | a | 32.70 | a | 51.89 | |||
1936 | 27.20 | a | 30.07 | a | 38.07 | a | 49.60 | 64.81 | d | 72.55 | a | 74.72 | b | 73.07 | a | 67.73 | 51.55 | 43.57 | 30.97 | b | 51.99 | |||||
1937 | 22.71 | 31.11 | 39.60 | a | 49.21 | a | 63.14 | x | 68.53 | 71.50 | a | 74.93 | d | 67.34 | a | 55.53 | a | 39.38 | a | 33.27 | a | 50.28 | a | |||
1938 | 31.70 | a | 34.70 | a | 39.40 | a | 48.96 | b | 54.57 | a | 69.53 | 73.48 | b | 75.10 | b | 66.93 | 57.94 | 32.30 | 29.23 | 51.15 | ||||||
1939 | 29.03 | b | 22.74 | a | 38.55 | 46.03 | a | 54.13 | a | 62.69 | a | 72.06 | 70.67 | a | 65.97 | a | 50.71 | 46.90 | 39.13 | 49.88 | ||||||
1940 | 28.13 | 31.63 | b | 40.23 | 49.67 | 62.35 | 72.47 | 76.00 | a | 74.48 | 66.67 | 57.87 | 38.80 | 36.03 | a | 52.86 | ||||||||||
1941 | 33.17 | a | 38.64 | 39.32 | 45.93 | 62.50 | a | 67.00 | 74.90 | 72.77 | a | 63.79 | a | 53.65 | 41.50 | 36.45 | 52.47 | |||||||||
1942 | 29.53 | a | 28.54 | b | 34.61 | 51.17 | 59.24 | b | 70.66 | a | 75.07 | b | 74.93 | a | 67.67 | 54.67 | a | 41.93 | a | 32.63 | a | 51.72 | ||||
1943 | 32.42 | 36.86 | 36.97 | 57.27 | 56.87 | 68.03 | 76.39 | 73.32 | 69.83 | 55.23 | 40.72 | e | 34.90 | 53.23 | ||||||||||||
1944 | 31.94 | 33.21 | 35.13 | 44.97 | 58.29 | 70.90 | 73.77 | 76.26 | 70.80 | 59.16 | 39.80 | 33.84 | 52.34 | |||||||||||||
1945 | 31.90 | 33.96 | 38.65 | 44.23 | 60.42 | 64.50 | 75.52 | 72.81 | 65.70 | 56.87 | 36.77 | 31.00 | 51.03 | |||||||||||||
1946 | 32.81 | 36.04 | 46.52 | 56.67 | 56.87 | 72.63 | 78.03 | 75.10 | 69.57 | 50.74 | 40.40 | 35.97 | 54.28 | |||||||||||||
1947 | 30.65 | 34.54 | 38.06 | 46.60 | 61.48 | 66.40 | 76.94 | 73.61 | 69.60 | 58.13 | 33.23 | 31.48 | 51.73 | |||||||||||||
1948 | 29.39 | 33.69 | 34.71 | 49.77 | 63.45 | 69.93 | 76.52 | 74.55 | 72.20 | 56.58 | 32.87 | 30.86 | c | 52.04 | ||||||||||||
1949 | 26.06 | 30.00 | 40.13 | 53.17 | 58.97 | 67.07 | 74.32 | 74.52 | 69.40 | 53.84 | 49.73 | 33.16 | 52.53 | |||||||||||||
1950 | 31.61 | 36.07 | 36.90 | 50.57 | 59.65 | 73.60 | 74.06 | 73.00 | 65.23 | 64.29 | 42.07 | 35.06 | 53.51 | |||||||||||||
1951 | 29.73 | a | 35.36 | 36.87 | a | 44.60 | 58.65 | 62.61 | b | 76.81 | 72.47 | a | 67.53 | 50.65 | 36.90 | 26.29 | 49.87 | |||||||||
1952 | 27.55 | 29.66 | 32.74 | 48.37 | 59.03 | 72.77 | 74.58 | 71.13 | 68.70 | 60.32 | 35.07 | 29.00 | a | 50.74 | ||||||||||||
1953 | 34.61 | 31.57 | 39.61 | 44.03 | 55.03 | 72.90 | 77.55 | 73.29 | 70.97 | 57.68 | 44.43 | 29.06 | 52.56 | |||||||||||||
1954 | 36.29 | 41.61 | 37.81 | 55.17 | 62.58 | 70.80 | 76.94 | 74.00 | 67.67 | 56.68 | 46.21 | a | 31.00 | 54.73 | ||||||||||||
1955 | 25.55 | 27.46 | b | 36.16 | 47.80 | 57.58 | 63.97 | a | 74.87 | 72.68 | 68.47 | 56.67 | a | 36.23 | 34.19 | 50.14 | ||||||||||
1956 | 32.84 | 29.04 | a | 37.71 | 45.13 | 63.13 | 73.50 | 73.29 | 70.03 | 70.83 | 57.39 | 35.07 | a | 32.17 | a | 51.68 | ||||||||||
1957 | 26.45 | 38.82 | 37.90 | 42.24 | a | 53.35 | 67.10 | a | 72.90 | 72.10 | 64.47 | 53.94 | 34.77 | 30.84 | 49.57 | |||||||||||
1958 | 29.57 | a | 36.26 | a | 36.97 | a | 43.33 | 64.06 | 72.57 | 73.32 | 76.19 | 69.17 | 59.26 | 42.83 | 32.23 | 52.98 | ||||||||||
1959 | 29.19 | 30.71 | 34.19 | 44.30 | 58.74 | 72.07 | 74.10 | 71.16 | 62.03 | 49.90 | 39.73 | 35.16 | 50.11 | |||||||||||||
1960 | 27.13 | a | 25.07 | 38.29 | 50.41 | a | 58.03 | a | 70.31 | a | 74.55 | 74.17 | a | 67.73 | 54.55 | 40.80 | 30.84 | 50.99 | ||||||||
1961 | 30.68 | 33.54 | 38.17 | a | 43.80 | 60.00 | 69.23 | 71.97 | 71.94 | 56.10 | a | 53.81 | 36.73 | 26.21 | b | 49.35 | ||||||||||
1962 | 24.97 | 33.46 | 34.13 | 50.43 | 59.45 | 67.77 | 72.10 | 73.32 | 67.20 | 58.90 | a | 44.59 | a | 34.35 | 51.72 | |||||||||||
1963 | 24.17 | a | 35.96 | 36.94 | 50.40 | 63.55 | 69.00 | 76.48 | 69.94 | 69.00 | 62.32 | 43.97 | 30.65 | 52.70 | ||||||||||||
1964 | 24.03 | 25.17 | 32.10 | a | 44.17 | 60.74 | 67.96 | d | 77.13 | 69.65 | 66.17 | 57.90 | 39.33 | 27.68 | 49.34 | |||||||||||
1965 | 28.13 | 29.39 | 30.23 | 45.83 | 54.35 | 63.97 | 71.97 | 69.10 | 58.13 | 59.94 | 40.90 | 31.06 | 48.58 | |||||||||||||
1966 | 25.90 | 28.29 | 40.81 | 47.31 | a | 61.45 | 66.67 | 76.29 | 72.10 | 65.20 | 53.29 | 42.17 | 25.90 | 50.45 | ||||||||||||
1967 | 28.90 | 30.04 | 41.26 | 46.00 | 54.48 | 62.60 | 73.03 | a | 70.77 | 65.23 | 54.42 | 40.77 | 24.58 | 49.34 | ||||||||||||
1968 | 30.19 | 34.28 | 39.81 | 41.03 | 54.19 | 69.77 | 73.29 | 67.39 | 62.03 | 53.23 | a | 32.20 | 26.42 | 48.65 | ||||||||||||
1969 | 32.32 | 32.50 | 33.19 | 48.60 | 62.48 | 60.80 | 75.19 | 75.13 | a | 64.73 | 40.55 | 35.27 | 28.97 | 49.15 | ||||||||||||
1970 | 26.16 | 35.48 | a | 33.42 | 38.47 | 58.71 | 67.20 | 73.10 | 73.32 | 61.40 | 44.84 | 36.55 | a | 28.52 | 48.10 | |||||||||||
1971 | 28.10 | 28.68 | 33.93 | b | 45.48 | c | 55.15 | e | 69.50 | d | 73.13 | a | 72.16 | 62.68 | e | 56.46 | e | 37.40 | e | 25.50 | a | 49.01 | ||||
1972 | ----- | z | 34.64 | d | ----- | z | 49.52 | e | 59.29 | 68.73 | 74.73 | a | 71.47 | a | 63.40 | 53.62 | b | 33.47 | 27.42 | 53.63 | b | |||||
1973 | 27.94 | 34.21 | 36.55 | 41.13 | 56.90 | 67.67 | 71.65 | 72.84 | 63.97 | 57.39 | 40.28 | a | 29.87 | 50.03 | ||||||||||||
1974 | 27.03 | 31.88 | b | 41.35 | 43.86 | a | 63.71 | 62.24 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.57 | g | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.57 | 31.92 | 36.79 | 46.46 | 57.96 | 67.93 | 73.41 | 71.60 | 65.32 | 54.08 | 39.30 | 30.04 | 50.32 | |||||||||||||
S.D. | 3.50 | 3.91 | 3.82 | 4.31 | 3.63 | 3.29 | 2.51 | 2.68 | 3.55 | 4.33 | 4.03 | 4.04 | 2.08 | |||||||||||||
SKEW | 0.03 | 0.04 | -0.02 | 0.18 | 0.14 | -0.21 | -0.22 | -0.40 | -0.56 | -0.37 | 0.13 | -0.01 | 0.25 | |||||||||||||
MAX | 36.29 | 41.61 | 46.52 | 57.27 | 66.70 | 73.60 | 78.24 | 76.26 | 72.20 | 64.29 | 49.73 | 39.13 | 55.21 | |||||||||||||
MIN | 21.23 | 22.74 | 28.00 | 35.69 | 49.03 | 60.80 | 67.29 | 65.35 | 54.93 | 40.55 | 32.17 | 20.58 | 45.60 | |||||||||||||
YRS | 63 | 64 | 63 | 64 | 63 | 62 | 64 | 64 | 64 | 64 | 64 | 64 | 59 |