YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.92 | q | 37.62 | b | 23.20 | 4.38 | b | 21.73 | i | |
1904 | -3.37 | d | -1.66 | 23.30 | a | 30.90 | 44.39 | 51.71 | b | 55.84 | 52.48 | 49.47 | 40.06 | 29.20 | 11.26 | 31.97 | ||||||||||
1905 | 0.06 | 8.82 | f | 25.00 | 35.17 | 44.55 | 53.80 | 58.33 | a | 58.13 | 50.55 | a | 36.81 | 26.30 | 17.79 | b | 36.95 | a | ||||||||
1906 | 14.56 | d | 11.36 | 17.10 | a | 36.59 | a | 44.03 | a | 53.45 | a | 55.74 | 60.32 | 53.07 | 37.60 | a | 29.10 | a | 16.68 | 35.80 | ||||||
1907 | 8.55 | 12.52 | c | 27.80 | a | 28.22 | c | 38.20 | a | 52.43 | 58.58 | 54.57 | a | 50.71 | b | 36.42 | 26.34 | a | 17.27 | a | 34.30 | |||||
1908 | 12.27 | a | 11.79 | 25.90 | 34.70 | 46.81 | 52.90 | 58.61 | 53.74 | 52.07 | 38.73 | a | 26.97 | a | 11.97 | 35.54 | ||||||||||
1909 | 10.41 | b | 16.08 | b | 22.83 | a | 31.79 | a | 43.13 | 54.90 | 56.61 | 58.71 | 48.97 | 34.52 | 33.24 | a | 7.61 | c | 34.90 | |||||||
1910 | 12.50 | g | 3.00 | 31.19 | 35.77 | 40.06 | 51.73 | d | 58.32 | 57.27 | a | 48.14 | a | 40.17 | b | 22.47 | 11.89 | c | 36.36 | a | ||||||
1911 | 7.24 | j | 19.70 | a | 24.00 | i | 32.80 | 50.10 | 57.70 | c | 59.46 | c | 54.33 | d | 50.78 | g | 38.42 | 20.64 | b | 21.07 | d | 39.36 | c | |||
1912 | -10.68 | 3.15 | b | 12.23 | 35.53 | 45.16 | 50.70 | 57.65 | 56.60 | a | 50.80 | 39.07 | c | 28.83 | a | 19.68 | 32.39 | |||||||||
1913 | 8.63 | a | 5.50 | 17.40 | a | 36.17 | 45.03 | 53.09 | g | 57.97 | 58.03 | 48.90 | 38.45 | b | 32.62 | a | 23.77 | 33.86 | a | |||||||
1914 | 17.83 | b | -0.93 | a | 21.69 | b | 34.39 | b | 47.80 | a | 53.23 | 60.10 | 56.57 | a | 49.41 | a | 44.60 | a | 27.00 | a | 7.50 | a | 34.93 | |||
1915 | 5.87 | 21.19 | a | 22.32 | 41.45 | a | 41.83 | a | 48.60 | 54.66 | b | 51.26 | 49.90 | 40.19 | 28.80 | 15.71 | 35.15 | |||||||||
1916 | 11.97 | 7.34 | 18.81 | 34.50 | b | 45.19 | 50.87 | 61.36 | c | 58.14 | c | 48.93 | a | 38.10 | a | 24.86 | b | 6.06 | 33.84 | |||||||
1917 | 1.69 | b | -3.89 | a | 20.23 | a | 32.59 | a | 39.19 | 51.66 | a | 62.32 | l | 53.35 | 46.00 | 31.35 | 28.47 | 7.57 | c | 28.02 | a | |||||
1918 | -4.97 | 7.75 | 26.23 | 30.22 | c | 47.37 | a | 52.59 | a | 54.52 | 58.26 | 42.77 | 40.03 | 31.07 | 23.77 | 34.13 | ||||||||||
1919 | 16.06 | 14.57 | 24.00 | a | 35.03 | 41.90 | 60.45 | a | 59.41 | d | 56.25 | c | 52.47 | 39.60 | a | 24.90 | 3.60 | a | 35.69 | |||||||
1920 | -0.74 | 6.24 | 21.97 | 30.25 | b | 40.32 | 56.04 | c | 54.71 | 51.90 | a | 51.67 | 43.80 | a | 27.13 | 18.10 | a | 33.45 | ||||||||
1921 | 15.53 | a | 18.81 | a | 27.32 | 39.47 | 48.17 | a | 57.53 | 62.52 | 57.97 | a | 53.76 | a | 40.16 | 23.33 | 15.26 | 38.32 | ||||||||
1922 | 5.13 | 9.04 | 25.42 | 34.40 | 50.39 | 55.13 | 56.48 | 55.87 | a | 50.79 | a | 39.00 | 32.07 | a | 10.55 | b | 35.36 | |||||||||
1923 | 10.23 | 2.19 | a | 14.39 | 31.60 | 40.70 | a | 56.69 | a | 58.94 | 54.47 | a | 48.73 | 35.20 | a | 28.97 | a | 23.89 | c | 33.83 | ||||||
1924 | -1.50 | a | 14.28 | 20.39 | 34.57 | 38.40 | a | 50.41 | a | 54.47 | a | 56.16 | 44.33 | 39.77 | 25.27 | 5.71 | 31.85 | |||||||||
1925 | 8.03 | 15.21 | 23.87 | 35.97 | 38.61 | 55.89 | b | 56.73 | a | 54.54 | c | 53.62 | a | 30.03 | a | 22.29 | b | 8.20 | a | 33.58 | ||||||
1926 | 9.58 | 15.30 | a | 14.90 | 30.53 | 45.87 | a | 49.29 | b | 57.63 | a | 56.97 | a | 49.14 | b | 37.68 | 21.27 | 9.23 | 33.11 | |||||||
1927 | 6.33 | a | 19.07 | 28.06 | 34.53 | 42.39 | 49.50 | 54.81 | 47.68 | 51.03 | 40.13 | a | 26.69 | a | 7.76 | b | 34.00 | |||||||||
1928 | 11.97 | 14.79 | a | 21.45 | 29.60 | 43.87 | 50.38 | a | 58.16 | 56.68 | 44.03 | 41.37 | a | 30.20 | 17.77 | 35.02 | ||||||||||
1929 | -8.00 | b | 1.07 | 25.19 | 37.55 | a | 40.77 | 50.27 | 57.55 | 53.35 | 47.37 | 37.43 | a | 22.40 | 15.16 | 31.68 | ||||||||||
1930 | 1.32 | 16.54 | 22.71 | 33.41 | a | 46.29 | 54.41 | a | 57.71 | 54.55 | 47.97 | 36.41 | b | 27.20 | 15.29 | 34.48 | ||||||||||
1931 | 16.77 | 21.75 | 23.48 | 33.28 | a | 40.45 | 58.03 | a | 59.55 | 55.26 | 55.00 | 43.48 | 34.67 | 25.27 | a | 38.92 | ||||||||||
1932 | 18.47 | a | 16.36 | a | 15.94 | 31.90 | 43.57 | a | 55.07 | a | 58.00 | 55.52 | 45.20 | 37.20 | a | 20.86 | a | 14.11 | c | 34.35 | ||||||
1933 | 19.84 | 8.18 | 23.03 | b | 33.55 | a | 47.26 | 58.80 | 58.55 | 52.35 | 51.87 | 35.55 | 23.03 | 14.26 | 35.52 | |||||||||||
1934 | 17.52 | 6.11 | 17.68 | c | 31.30 | c | 46.03 | 57.00 | 58.27 | a | 52.32 | 46.59 | a | 39.10 | b | 32.20 | 10.30 | a | 34.53 | |||||||
1935 | 4.50 | c | 15.81 | a | 25.00 | a | 32.63 | 39.52 | b | 50.67 | c | 62.17 | b | 57.35 | 48.00 | a | 38.35 | 27.77 | d | 14.48 | 34.69 | |||||
1936 | 1.93 | a | -4.79 | 26.13 | 30.33 | 48.80 | a | 50.60 | 58.38 | e | 59.06 | 53.86 | b | 36.81 | 23.76 | a | 17.83 | a | 33.56 | |||||||
1937 | 7.30 | a | 11.00 | 21.06 | 34.55 | a | 45.26 | 53.23 | 59.17 | a | 60.94 | 48.43 | 35.40 | a | 23.63 | 12.06 | 34.34 | |||||||||
1938 | 8.65 | 19.07 | 29.52 | 36.13 | 44.39 | 53.70 | 60.16 | 59.52 | 50.03 | 42.12 | e | 27.83 | 13.90 | a | 37.08 | |||||||||||
1939 | 15.10 | 7.22 | a | 19.57 | a | 30.83 | 46.37 | a | 55.97 | a | 57.76 | b | 55.45 | 50.00 | a | 38.90 | 27.90 | 23.48 | 35.71 | |||||||
1940 | 2.63 | a | 13.57 | a | 17.48 | 32.30 | 43.57 | a | 55.41 | a | 59.70 | d | 58.90 | a | 49.60 | 42.19 | 26.72 | a | 17.52 | 34.97 | ||||||
1941 | 15.84 | 10.56 | a | 19.19 | 40.30 | 49.35 | 56.10 | 59.71 | 57.52 | 53.79 | a | 43.65 | 31.55 | a | 23.32 | 38.41 | ||||||||||
1942 | 10.10 | a | 12.68 | 28.52 | 38.30 | 45.29 | 56.10 | 59.61 | 58.03 | 50.20 | 40.03 | 27.63 | 10.77 | 36.44 | ||||||||||||
1943 | 4.45 | b | 9.18 | 16.32 | 32.93 | 44.07 | a | 59.40 | 61.06 | 60.10 | 46.97 | 39.87 | 24.73 | 15.87 | a | 34.58 | ||||||||||
1944 | 16.52 | 13.03 | 20.61 | 32.10 | 50.73 | a | 57.67 | 57.48 | 58.35 | 52.90 | 37.35 | 34.73 | 8.81 | 36.69 | ||||||||||||
1945 | 6.07 | a | 10.43 | 32.35 | 35.13 | 40.58 | 50.52 | a | 54.84 | 57.71 | 50.17 | 36.84 | 27.03 | a | 9.10 | 34.23 | ||||||||||
1946 | 11.77 | 11.39 | 31.06 | 34.97 | 42.65 | 53.03 | 58.39 | 54.23 | 49.20 | 42.35 | 28.80 | 17.68 | 36.29 | |||||||||||||
1947 | 14.06 | 7.11 | 20.84 | 32.90 | 35.64 | t | ----- | z | 58.00 | y | 64.00 | 46.45 | j | 45.74 | 22.00 | 13.17 | a | 27.48 | d | |||||||
1948 | 2.06 | 9.03 | 19.68 | 41.94 | n | 42.71 | 55.90 | j | 62.76 | n | 58.12 | g | ----- | z | 39.30 | h | 33.73 | 16.10 | 20.55 | f | ||||||
1949 | 12.97 | 10.11 | 23.06 | 34.17 | 45.87 | a | 57.57 | 62.07 | a | 58.94 | 45.21 | a | 40.03 | a | 27.30 | 16.65 | 36.16 | |||||||||
1950 | 10.97 | 11.93 | a | 18.39 | 30.76 | a | 43.55 | 55.07 | 57.13 | 53.87 | 49.68 | b | 42.94 | 21.97 | a | 5.13 | a | 33.45 | ||||||||
1951 | 3.21 | c | 10.11 | 20.29 | 35.82 | b | 48.39 | 51.86 | a | 56.90 | 54.48 | b | 46.00 | c | 41.06 | 18.76 | a | ----- | z | 35.17 | a | |||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.56 | o | ----- | z |
1953 | 14.50 | c | 15.86 | 25.74 | 32.86 | a | 45.59 | b | 58.56 | c | 61.77 | r | 61.77 | r | 46.47 | k | 40.90 | a | 29.77 | 19.84 | 31.51 | c | ||||
1954 | 9.48 | 22.79 | 21.23 | a | 35.77 | 40.74 | 57.47 | 59.13 | 56.00 | 51.73 | 39.90 | ----- | z | ----- | z | 39.42 | b | |||||||||
1955 | 10.70 | a | 12.07 | 20.03 | 38.87 | 46.24 | b | 53.73 | 63.77 | 61.31 | b | 48.37 | 40.84 | 22.37 | 10.30 | a | 35.72 | |||||||||
1956 | 10.87 | 10.07 | 17.97 | 31.63 | 43.74 | 56.77 | 57.39 | 58.68 | 46.97 | 42.63 | a | 27.73 | 17.39 | 35.15 | ||||||||||||
1957 | 2.52 | 17.79 | 22.74 | 37.10 | 44.32 | 55.17 | 59.68 | 56.39 | 46.53 | 35.77 | 27.87 | 19.13 | a | 35.42 | ||||||||||||
1958 | 12.19 | 6.36 | 24.94 | 34.07 | 43.74 | 49.90 | 56.74 | 56.97 | 50.30 | 42.06 | 28.73 | 7.35 | 34.45 | |||||||||||||
1959 | 0.26 | 3.46 | 17.58 | 34.70 | g | 49.87 | 55.57 | 57.16 | 63.23 | 50.10 | 38.29 | 18.70 | 24.29 | 34.41 | a | |||||||||||
1960 | 15.90 | 13.90 | 9.37 | a | 37.17 | 45.10 | 52.37 | 55.80 | a | 58.81 | 53.23 | 38.57 | a | 30.07 | 12.17 | a | 35.20 | |||||||||
1961 | 7.24 | b | 19.00 | a | 28.05 | k | 32.47 | 40.97 | a | 53.87 | 59.10 | 57.19 | 52.38 | a | 41.65 | 27.86 | b | 10.42 | 36.56 | a | ||||||
1962 | -0.29 | j | 9.96 | a | 21.26 | 34.36 | b | 50.90 | 54.10 | a | 56.22 | d | 56.10 | a | 45.72 | a | 42.81 | 26.33 | i | 13.50 | c | 38.49 | b | |||
1963 | -1.74 | 2.46 | 21.90 | 34.33 | 42.35 | 53.70 | 61.05 | i | 54.00 | c | 46.23 | 45.55 | 31.21 | a | 3.10 | 30.28 | a | |||||||||
1964 | 14.87 | 14.86 | 21.55 | 36.22 | c | 49.68 | 54.03 | 60.86 | c | 54.15 | d | 49.60 | 34.73 | a | 29.80 | 12.40 | a | 36.06 | ||||||||
1965 | 7.61 | 8.63 | a | 18.16 | 33.34 | a | 49.93 | b | 51.43 | 55.84 | 55.93 | a | 50.93 | 40.19 | ----- | z | 20.41 | n | 37.20 | b | ||||||
1966 | 1.23 | 12.64 | 27.26 | 34.47 | 40.23 | 56.37 | 61.47 | a | 56.84 | 47.97 | 37.45 | 27.93 | 13.84 | 34.81 | ||||||||||||
1967 | 11.97 | 5.36 | 23.84 | 36.07 | 41.23 | 56.70 | 55.55 | 51.68 | 46.63 | 37.52 | 24.20 | 16.23 | 33.91 | |||||||||||||
1968 | 9.58 | 6.07 | 26.52 | 36.97 | 43.48 | 56.20 | 58.87 | 57.94 | 51.53 | 41.94 | 28.73 | 14.45 | 36.02 | |||||||||||||
1969 | 6.81 | 15.86 | 18.23 | 36.13 | 44.68 | 50.33 | 59.45 | 59.19 | 49.67 | 37.74 | 24.79 | a | 14.19 | 34.76 | ||||||||||||
1970 | -0.26 | 8.89 | 20.74 | 41.40 | 47.84 | 56.33 | 60.52 | 57.16 | 52.50 | 43.48 | ----- | z | ----- | z | 38.86 | b | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 7.96 | 10.71 | 22.03 | 34.30 | 44.45 | 54.14 | 58.25 | 56.46 | 49.48 | 39.30 | 26.94 | 14.01 | 34.90 | |||||||||||||
S.D. | 6.85 | 6.19 | 4.53 | 2.80 | 3.35 | 2.86 | 2.14 | 2.90 | 2.72 | 3.05 | 3.80 | 5.56 | 1.52 | |||||||||||||
SKEW | -0.50 | -0.36 | -0.09 | 0.40 | 0.11 | 0.01 | 0.21 | -0.13 | -0.23 | -0.33 | -0.09 | 0.10 | 0.32 | |||||||||||||
MAX | 19.84 | 22.79 | 32.35 | 41.45 | 50.90 | 60.45 | 63.77 | 64.00 | 55.00 | 45.74 | 34.73 | 25.27 | 38.92 | |||||||||||||
MIN | -10.68 | -4.79 | 9.37 | 28.22 | 38.20 | 48.60 | 54.47 | 47.68 | 42.77 | 30.03 | 18.70 | 3.10 | 31.68 | |||||||||||||
YRS | 63 | 65 | 64 | 64 | 65 | 63 | 61 | 64 | 62 | 66 | 63 | 63 | 50 |