YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1896 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.43 | i | 22.68 | 22.68 | k | |
1897 | 17.65 | 25.86 | 28.60 | a | 34.13 | 42.29 | 49.17 | 52.26 | 49.16 | 45.67 | 36.00 | 26.63 | 19.17 | a | 35.55 | |||||||||||
1898 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1899 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1900 | ----- | z | ----- | z | 28.42 | 30.07 | 43.00 | 49.83 | 54.35 | 51.81 | 50.07 | 38.15 | d | 30.13 | 17.47 | a | 39.33 | b | ||||||||
1901 | 23.10 | a | ----- | z | 26.17 | y | 29.30 | 42.12 | e | 44.15 | q | 58.53 | p | 55.92 | e | 45.88 | e | 37.19 | e | 31.00 | r | 20.20 | k | 38.92 | f | |
1902 | 20.78 | d | 21.64 | 25.55 | 34.20 | 40.67 | g | 51.29 | i | 52.67 | a | 53.24 | b | 44.43 | 33.00 | e | 24.03 | 21.84 | 33.14 | b | ||||||
1903 | 22.84 | 18.89 | a | 24.87 | 35.30 | 38.23 | 47.93 | a | 54.06 | 53.37 | a | 45.93 | c | 29.03 | a | 23.87 | 13.21 | c | 33.96 | |||||||
1904 | 16.65 | 27.23 | g | 28.07 | a | 32.93 | 35.19 | ----- | z | 46.97 | 53.35 | 47.37 | 37.83 | a | 23.86 | a | 23.21 | b | 34.54 | b | ||||||
1905 | 23.70 | a | 21.93 | a | 32.43 | h | 33.33 | c | 42.07 | a | 51.14 | a | 52.03 | 52.00 | d | 47.00 | a | 34.90 | b | 30.10 | 15.20 | a | 36.67 | a | ||
1906 | 18.23 | 24.11 | 27.71 | g | 34.39 | b | 41.16 | 48.53 | 53.29 | 51.52 | 45.93 | a | 33.28 | b | 25.61 | b | 26.97 | 36.64 | a | |||||||
1907 | 27.37 | a | 25.52 | c | 32.03 | 34.00 | a | 37.55 | 45.93 | 54.19 | 55.00 | 46.87 | 37.16 | 25.76 | a | 21.90 | a | 36.94 | ||||||||
1908 | 20.74 | 24.07 | a | 32.23 | 35.43 | 39.52 | 46.87 | 53.23 | 53.29 | 42.50 | 32.42 | 22.41 | a | 22.35 | 35.42 | |||||||||||
1909 | 25.68 | 22.71 | 24.68 | 32.21 | b | 37.58 | 48.30 | 55.42 | 53.74 | 43.10 | 33.52 | 27.70 | 16.76 | b | 35.12 | |||||||||||
1910 | 25.42 | 18.86 | 28.66 | b | 33.27 | 42.19 | d | 50.15 | d | 54.81 | 54.55 | 46.41 | a | 33.74 | 28.92 | d | 22.35 | 36.61 | ||||||||
1911 | 26.70 | a | 22.68 | 33.45 | 36.53 | 39.81 | 49.27 | 54.37 | a | 50.90 | 48.10 | 33.81 | 24.03 | 15.71 | 36.28 | |||||||||||
1912 | 18.06 | 17.17 | 26.70 | a | 31.13 | 41.19 | 48.23 | 49.62 | o | 52.96 | g | 43.50 | 36.06 | 23.23 | 18.00 | b | 30.33 | b | ||||||||
1913 | 17.35 | 21.46 | 25.87 | 27.53 | 35.48 | 40.86 | b | 50.94 | 50.37 | d | 40.97 | a | 32.90 | a | 29.67 | 12.97 | 32.20 | |||||||||
1914 | 24.70 | h | 18.43 | 21.29 | 32.40 | 41.42 | 48.60 | 51.81 | 50.35 | 43.35 | d | 36.94 | 27.17 | 19.59 | b | 35.58 | a | |||||||||
1915 | 18.03 | 23.70 | a | 24.55 | 35.30 | 38.45 | b | 47.13 | 55.16 | 50.68 | 45.17 | 31.16 | 23.27 | 19.90 | a | 34.37 | ||||||||||
1916 | 23.10 | 24.28 | 30.47 | l | 35.54 | b | 44.94 | 53.70 | 53.78 | d | 53.35 | 45.00 | 35.03 | 20.80 | 20.16 | 37.24 | a | |||||||||
1917 | 20.58 | 23.54 | 22.48 | 32.40 | 37.48 | 46.13 | 53.87 | 52.87 | 46.36 | b | 30.87 | 23.40 | 20.40 | a | 34.20 | |||||||||||
1918 | 16.62 | b | 23.00 | 30.29 | 33.27 | 42.06 | 53.54 | d | 55.33 | g | 51.74 | 44.57 | 36.00 | 22.97 | 17.67 | a | 33.79 | a | ||||||||
1919 | 17.45 | 22.64 | 28.29 | 37.23 | 42.61 | c | 50.50 | h | 54.29 | 50.97 | 48.69 | a | 38.73 | a | 22.97 | 23.84 | 35.25 | a | ||||||||
1920 | 21.48 | 26.66 | 26.58 | 30.96 | f | 41.07 | b | 48.40 | e | 51.43 | a | 49.81 | 44.37 | 39.30 | a | 26.84 | k | 17.58 | 36.67 | b | ||||||
1921 | 23.50 | a | 20.39 | 28.03 | b | 31.86 | a | 44.26 | 48.97 | 54.74 | 54.17 | s | 44.97 | 36.03 | 25.85 | d | 27.84 | l | 35.86 | b | ||||||
1922 | 15.45 | 23.29 | 27.84 | 35.77 | 43.19 | 53.47 | 55.10 | 54.23 | 47.33 | 33.61 | 25.50 | 24.03 | 36.57 | |||||||||||||
1923 | 22.06 | 23.68 | 26.94 | 34.93 | 42.55 | 51.60 | 56.03 | 54.13 | 44.60 | 35.90 | 27.70 | 19.23 | 36.61 | |||||||||||||
1924 | 16.29 | 20.69 | 25.90 | 34.03 | 42.10 | 51.00 | 55.81 | 52.58 | 43.20 | 35.23 | 27.27 | 17.47 | a | 35.13 | ||||||||||||
1925 | 15.35 | 23.37 | a | 29.10 | 39.20 | 45.87 | 52.07 | 56.19 | 51.48 | 47.03 | 36.45 | 23.30 | 16.06 | 36.29 | ||||||||||||
1926 | 16.45 | 24.26 | a | 24.94 | 34.87 | 42.65 | 47.70 | 52.35 | 51.10 | 49.55 | a | 38.13 | ----- | z | 7.50 | w | 38.20 | b | ||||||||
1927 | 14.55 | 27.71 | 27.00 | 34.20 | 42.00 | 47.97 | 55.16 | 52.23 | 47.80 | 32.80 | a | 32.73 | 16.45 | 35.88 | ||||||||||||
1928 | 18.94 | 21.21 | 29.71 | 34.36 | b | 44.26 | 48.40 | 54.73 | a | 53.06 | 44.40 | 39.83 | b | 28.47 | 23.39 | 36.73 | ||||||||||
1929 | 18.60 | a | 16.50 | b | 27.97 | a | 32.45 | a | 39.55 | 47.50 | 54.81 | 51.45 | 47.83 | a | 37.77 | 22.47 | 16.33 | a | 34.44 | |||||||
1930 | 16.68 | 26.15 | a | 23.60 | a | 35.45 | a | 38.26 | 49.13 | 54.55 | 54.32 | 44.03 | 37.74 | 19.66 | a | 14.77 | 34.53 | |||||||||
1931 | 14.00 | 25.11 | 21.16 | 35.30 | 41.29 | 50.40 | 55.48 | 52.87 | 51.13 | 39.39 | 30.00 | 21.71 | 36.49 | |||||||||||||
1932 | 19.52 | 27.76 | 24.74 | 33.03 | 39.48 | 47.67 | 56.03 | 56.26 | 44.77 | 35.48 | 24.13 | 15.06 | 35.33 | |||||||||||||
1933 | 20.33 | a | 17.07 | a | 28.90 | 30.77 | 38.84 | 50.33 | 56.10 | 54.19 | 49.77 | 37.42 | 25.93 | 21.65 | 35.94 | |||||||||||
1934 | 16.03 | a | 25.89 | 28.17 | a | 37.53 | 46.03 | 51.00 | 56.35 | 56.13 | 46.87 | 38.87 | 28.10 | 23.06 | 37.84 | |||||||||||
1935 | 21.61 | 22.18 | 30.87 | 38.73 | 41.90 | 51.23 | 55.52 | 55.65 | 45.70 | 36.74 | 26.77 | 21.58 | 37.37 | |||||||||||||
1936 | 20.13 | 25.69 | 29.48 | 34.63 | 45.42 | 51.10 | 54.19 | 54.13 | 47.63 | 34.58 | 23.60 | 18.48 | 36.59 | |||||||||||||
1937 | 14.97 | 23.04 | 25.13 | 32.20 | 43.61 | 49.77 | 53.45 | 53.81 | 49.17 | 37.61 | 25.07 | a | 29.45 | i | 37.07 | a | ||||||||||
1938 | 20.61 | 25.75 | 30.03 | 33.03 | 42.13 | 52.40 | 53.71 | 51.71 | 46.10 | 35.10 | 20.27 | 20.40 | a | 35.94 | ||||||||||||
1939 | 21.71 | 18.22 | a | 28.57 | a | 34.03 | a | 41.68 | 49.79 | a | 54.13 | 51.48 | 47.07 | 32.29 | 22.57 | 22.61 | 35.35 | |||||||||
1940 | 18.00 | 22.79 | 27.03 | 35.10 | 42.90 | 49.03 | 55.26 | 53.29 | 48.10 | 36.55 | 25.67 | 25.13 | 36.57 | |||||||||||||
1941 | 22.50 | a | 27.00 | 27.19 | 35.80 | 46.35 | 48.00 | 54.03 | 53.65 | 49.03 | 40.90 | 28.30 | ----- | z | 39.34 | a | ||||||||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 32.19 | 21.10 | 18.16 | 23.82 | i | |||
1944 | 17.32 | 21.97 | 24.19 | 32.17 | 40.58 | 49.70 | 55.58 | 55.32 | 46.97 | 37.84 | 26.03 | 18.35 | 35.50 | |||||||||||||
1945 | 21.71 | 23.00 | 24.84 | 33.27 | 43.39 | 48.53 | 55.10 | 56.06 | 46.97 | 38.06 | 27.93 | 21.74 | 36.72 | |||||||||||||
1946 | 19.16 | 21.89 | 30.48 | 38.73 | 43.32 | 51.67 | 55.90 | 56.23 | 51.30 | 38.13 | 26.37 | 24.55 | 38.14 | |||||||||||||
1947 | 20.61 | 21.54 | 28.42 | 34.63 | 45.26 | 50.23 | 56.15 | k | 55.20 | a | 47.63 | 38.53 | a | 26.30 | 19.10 | 35.22 | a | |||||||||
1948 | 18.35 | 23.38 | 25.10 | 38.30 | 44.42 | 52.57 | 54.61 | 54.42 | 46.53 | 36.35 | 22.67 | 25.00 | 36.81 | |||||||||||||
1949 | 16.39 | 23.36 | 29.03 | 35.70 | 44.29 | 52.50 | 57.26 | 53.06 | 49.83 | 35.33 | a | 29.47 | 20.58 | 37.23 | ||||||||||||
1950 | 22.52 | b | 25.50 | 29.23 | 35.43 | 41.77 | 51.67 | 56.55 | 49.97 | 44.89 | b | 36.65 | 23.40 | 22.52 | 36.67 | |||||||||||
1951 | 19.87 | a | 21.96 | 27.45 | 32.30 | 41.68 | 48.50 | 56.87 | 55.32 | 46.53 | 38.74 | 24.13 | 22.45 | 36.32 | ||||||||||||
1952 | 26.58 | 24.21 | 25.61 | 34.90 | 42.32 | 52.60 | 54.23 | a | 55.90 | 46.20 | 31.26 | 24.72 | a | 21.68 | 36.68 | |||||||||||
1953 | 26.77 | 20.75 | 31.13 | 34.60 | 37.90 | 51.03 | ----- | z | ----- | z | 41.79 | k | 34.50 | a | 26.63 | 15.26 | 30.95 | c | ||||||||
1954 | 20.74 | 23.64 | 27.40 | a | 36.00 | 42.55 | 49.23 | 55.77 | 53.39 | 48.33 | 38.74 | 25.70 | 20.32 | 36.82 | ||||||||||||
1955 | 20.10 | 18.43 | 29.20 | a | 33.17 | 42.06 | 47.13 | 52.81 | 52.81 | 44.07 | 35.10 | 25.57 | 21.94 | 35.20 | ||||||||||||
1956 | 23.32 | 17.62 | 26.48 | 30.31 | a | 40.27 | a | 51.57 | 51.94 | 48.52 | 40.90 | 34.29 | 18.87 | 15.00 | 33.26 | |||||||||||
1957 | 23.35 | 29.11 | 26.45 | 31.53 | 37.61 | 48.50 | 54.61 | 53.23 | 40.90 | 35.81 | 23.50 | 20.32 | 35.41 | |||||||||||||
1958 | 16.77 | 23.79 | 23.65 | 32.70 | 40.35 | 50.17 | 51.65 | 52.32 | 48.10 | 35.90 | 24.07 | 18.61 | 34.84 | |||||||||||||
1959 | 17.71 | 21.19 | a | 19.74 | l | 36.18 | m | 40.71 | 50.43 | 52.83 | m | 53.74 | 42.20 | 34.23 | 22.33 | 21.03 | 33.73 | c | ||||||||
1960 | 16.10 | 19.97 | 30.71 | 32.53 | 37.13 | 48.50 | 52.93 | a | 50.87 | 45.20 | 33.39 | 23.93 | 17.03 | 34.02 | ||||||||||||
1961 | 16.39 | 21.21 | 25.13 | 29.13 | 42.06 | 48.37 | 52.97 | 53.90 | 45.37 | 32.06 | 24.47 | 22.39 | 34.45 | |||||||||||||
1962 | 14.74 | 24.67 | a | 21.84 | 32.50 | 38.00 | 46.10 | 54.26 | 48.45 | 48.14 | a | 36.81 | 27.27 | 20.26 | 34.42 | |||||||||||
1963 | 13.19 | 22.50 | 23.84 | 36.90 | 40.48 | 45.57 | 55.48 | 52.65 | 47.00 | 33.13 | 24.00 | 14.68 | 34.12 | |||||||||||||
1964 | 12.10 | 14.46 | a | 22.35 | 30.30 | 40.10 | a | 47.77 | 54.13 | 52.74 | 46.53 | 32.58 | 24.30 | 20.26 | 33.14 | |||||||||||
1965 | 21.68 | 18.04 | 22.13 | 32.53 | 41.06 | 47.17 | 54.77 | 51.06 | 45.14 | a | 34.13 | 26.60 | 23.65 | 34.83 | ||||||||||||
1966 | 12.73 | a | 16.37 | a | 24.16 | 32.33 | 46.94 | 49.50 | 52.35 | 47.55 | 39.87 | 28.77 | 24.47 | 20.39 | 32.95 | |||||||||||
1967 | 21.87 | a | 25.54 | 31.90 | 32.27 | 39.77 | 47.07 | 56.06 | 54.13 | 46.40 | 31.13 | 25.97 | 20.80 | a | 36.08 | |||||||||||
1968 | 18.93 | q | 23.66 | 26.90 | 28.73 | 36.32 | 45.53 | 53.16 | 51.42 | 38.33 | 32.84 | 23.73 | 18.97 | 34.51 | a | |||||||||||
1969 | 20.26 | 19.29 | 19.45 | 33.83 | 36.74 | 43.10 | 54.06 | 52.52 | 45.17 | 30.77 | ----- | z | ----- | z | 35.52 | b | ||||||||||
1970 | ----- | z | 20.32 | c | 21.35 | 29.59 | a | 39.00 | 45.63 | ----- | z | 50.16 | 44.90 | 30.67 | a | 22.67 | 21.03 | 32.53 | b | |||||||
1971 | 16.10 | 17.57 | 22.40 | a | 27.87 | 39.58 | ----- | z | 49.97 | 50.32 | 43.33 | 32.45 | ----- | z | ----- | z | 33.29 | c | ||||||||
1972 | 25.85 | r | 22.07 | 29.68 | 29.17 | 37.13 | 48.97 | 53.50 | m | 50.94 | 46.77 | 37.41 | d | 22.20 | 13.75 | o | 36.04 | c | ||||||||
1973 | 16.04 | e | 19.21 | 24.03 | 26.60 | 35.41 | i | ----- | z | ----- | z | 48.53 | n | 43.47 | ----- | z | 23.40 | j | 13.14 | j | 25.87 | g | ||||
1974 | 18.14 | i | 18.45 | h | 25.40 | a | 28.14 | h | 39.91 | h | 46.20 | 51.55 | 49.74 | 43.93 | 37.42 | 22.87 | ----- | z | 39.59 | e | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 19.43 | 22.30 | 26.74 | 33.45 | 41.16 | 49.08 | 54.11 | 52.68 | 45.87 | 35.28 | 25.09 | 19.88 | 35.58 | |||||||||||||
S.D. | 3.61 | 3.07 | 3.04 | 2.68 | 2.70 | 2.41 | 1.80 | 2.04 | 2.53 | 2.72 | 2.70 | 3.12 | 1.33 | |||||||||||||
SKEW | 0.23 | -0.29 | -0.13 | -0.26 | -0.11 | -0.52 | -1.16 | -0.22 | -0.41 | -0.28 | 0.30 | -0.23 | -0.45 | |||||||||||||
MAX | 27.37 | 29.11 | 33.45 | 39.20 | 46.94 | 53.70 | 57.26 | 56.26 | 51.30 | 40.90 | 32.73 | 26.97 | 38.14 | |||||||||||||
MIN | 12.10 | 14.46 | 19.45 | 26.60 | 35.19 | 40.86 | 46.97 | 47.55 | 38.33 | 28.77 | 18.87 | 12.97 | 32.20 | |||||||||||||
YRS | 68 | 70 | 69 | 71 | 71 | 68 | 65 | 70 | 73 | 74 | 69 | 66 | 48 |