YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1903 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.67 | r | 48.74 | b | 31.88 | 13.43 | c | 31.35 | i | |
1904 | 10.09 | h | 8.75 | a | 29.91 | b | 40.61 | b | 56.00 | 63.46 | b | 67.88 | a | 64.58 | 60.30 | 49.39 | 38.42 | 19.42 | 45.34 | a | ||||||
1905 | 9.91 | b | 17.95 | g | 32.87 | 44.60 | 54.82 | a | 64.27 | 68.43 | a | 68.42 | 62.38 | a | 47.52 | 34.77 | 25.62 | b | 46.69 | a | ||||||
1906 | 22.19 | d | 19.73 | 23.80 | a | 47.40 | a | 55.60 | a | 64.19 | a | 67.92 | 70.66 | 65.05 | 47.75 | a | 35.28 | a | 23.92 | 45.29 | ||||||
1907 | 17.20 | a | 22.40 | c | 36.45 | a | 36.68 | e | 49.00 | a | 63.08 | 69.11 | 65.63 | a | 59.96 | c | 46.65 | 33.97 | a | 24.58 | a | 43.73 | ||||
1908 | 21.13 | a | 20.00 | 33.82 | 45.27 | 56.84 | 63.52 | 69.79 | 66.77 | 65.22 | 49.37 | a | 36.59 | a | 21.19 | 45.79 | ||||||||||
1909 | 19.80 | c | 22.87 | b | 29.48 | a | 39.95 | a | 53.74 | 65.08 | 68.60 | 70.44 | 59.38 | 45.32 | a | 41.98 | b | 13.85 | g | 46.97 | a | |||||
1910 | 20.17 | g | 13.06 | a | 41.65 | a | 48.05 | 51.92 | a | 66.54 | d | 72.85 | 69.59 | b | 59.19 | a | 51.50 | b | 28.67 | 19.61 | c | 47.51 | a | |||
1911 | 17.13 | l | 25.88 | c | 34.73 | k | 43.79 | b | 61.89 | 69.54 | c | 71.87 | d | 66.70 | d | 60.36 | l | 46.65 | a | 28.67 | d | 29.12 | g | 51.87 | d | |
1912 | -2.15 | 11.44 | b | 21.56 | 46.88 | 56.90 | a | 62.95 | 69.24 | 66.17 | a | 61.28 | a | 50.04 | c | 36.95 | b | 27.37 | 42.39 | |||||||
1913 | 18.28 | a | 14.64 | 27.32 | c | 46.65 | 55.19 | 62.50 | l | 69.02 | a | 68.82 | 59.90 | 47.57 | b | 40.24 | a | 30.97 | 43.51 | a | ||||||
1914 | 24.93 | b | 9.91 | a | 29.40 | b | 45.23 | b | 58.73 | a | 64.35 | 71.84 | 68.47 | a | 60.38 | a | 54.42 | a | 35.84 | a | 14.87 | a | 44.86 | |||
1915 | 15.08 | a | 27.41 | a | 30.13 | 53.67 | a | 51.30 | a | 60.22 | 65.77 | c | 62.45 | 60.97 | 50.45 | 37.59 | a | 22.74 | 44.81 | |||||||
1916 | 21.68 | a | 14.60 | 28.27 | 44.84 | b | 55.93 | a | 60.88 | 75.88 | c | 70.25 | c | 59.12 | a | 48.03 | b | 32.85 | c | 16.16 | b | 44.04 | ||||
1917 | 12.59 | d | 7.11 | a | 28.70 | a | 41.57 | a | 50.53 | 60.60 | a | 73.26 | l | 65.65 | 57.83 | 39.10 | a | 36.60 | 15.39 | c | 37.79 | a | ||||
1918 | 3.29 | b | 17.12 | 35.81 | 40.94 | c | 59.22 | a | 64.29 | a | 68.08 | a | 71.40 | 54.90 | 51.69 | 38.27 | 30.03 | 44.59 | ||||||||
1919 | 23.15 | 23.15 | a | 32.45 | b | 44.50 | 53.23 | 70.67 | a | 73.00 | g | 67.84 | c | 63.32 | 48.93 | a | 31.88 | 11.60 | a | 42.79 | a | |||||
1920 | 8.60 | 15.83 | 31.81 | 39.59 | b | 53.00 | 67.98 | c | 66.39 | 65.29 | b | 63.30 | 55.60 | a | 34.03 | a | 26.02 | b | 43.95 | |||||||
1921 | 23.32 | a | 26.63 | a | 36.15 | 49.55 | 58.38 | a | 69.93 | 77.11 | 69.20 | a | 64.34 | a | 49.03 | 30.37 | 22.81 | 48.07 | ||||||||
1922 | 14.67 | b | 18.48 | 32.48 | 44.25 | b | 61.71 | 67.15 | 67.74 | 69.28 | a | 63.41 | a | 51.19 | 39.05 | b | 18.41 | b | 45.65 | |||||||
1923 | 17.52 | 10.73 | b | 23.84 | 42.45 | a | 54.36 | b | 69.20 | b | 71.97 | 66.83 | a | 60.57 | 46.78 | a | 37.81 | a | 31.39 | c | 44.45 | |||||
1924 | 8.98 | a | 21.43 | 27.52 | 44.25 | 48.97 | a | 62.07 | a | 66.67 | a | 67.02 | 55.62 | a | 53.95 | 34.60 | 14.48 | a | 42.13 | |||||||
1925 | 17.19 | 24.18 | 33.52 | 49.72 | 52.21 | 67.52 | b | 69.08 | a | 68.34 | c | 64.26 | c | 38.18 | a | 32.56 | c | 15.64 | c | 44.37 | ||||||
1926 | 18.48 | 22.85 | a | 23.37 | 40.90 | a | 58.03 | a | 61.39 | b | 69.72 | a | 68.90 | a | 59.25 | b | 46.68 | 29.48 | 17.56 | 43.05 | ||||||
1927 | 14.83 | a | 26.96 | 36.95 | 44.00 | 53.39 | 61.75 | 67.85 | 64.13 | 63.72 | 51.67 | a | 34.53 | a | 16.85 | e | 44.72 | |||||||||
1928 | 20.15 | 23.43 | b | 31.92 | a | 39.92 | 57.55 | 61.29 | a | 69.87 | 68.85 | 57.07 | 51.53 | a | 36.82 | 25.23 | 45.30 | |||||||||
1929 | 4.14 | b | 11.00 | 34.53 | 47.34 | a | 53.07 | a | 62.38 | 70.02 | 66.44 | 59.15 | 47.47 | a | 31.18 | 22.34 | 42.42 | |||||||||
1930 | 11.05 | a | 27.04 | 31.81 | 45.74 | a | 57.50 | 66.09 | a | 71.35 | a | 69.81 | 61.85 | 46.24 | b | 38.35 | 23.15 | 45.83 | ||||||||
1931 | 24.40 | 29.75 | 31.42 | a | 47.03 | a | 53.19 | 69.97 | a | 74.43 | a | 69.69 | 67.25 | 53.10 | a | 43.13 | 31.59 | b | 49.58 | |||||||
1932 | 25.40 | a | 26.09 | a | 24.63 | a | 42.72 | 56.85 | a | 68.10 | a | 71.47 | 68.98 | 59.98 | 47.08 | a | 30.41 | a | 22.18 | c | 45.33 | |||||
1933 | 28.32 | 19.15 | a | 30.36 | b | 43.07 | a | 56.71 | 71.78 | 70.87 | 66.27 | 64.67 | 46.42 | 31.78 | 22.13 | 45.96 | ||||||||||
1934 | 25.63 | 16.66 | 28.02 | c | 42.33 | c | 62.79 | 71.37 | 72.65 | a | 65.92 | 58.40 | a | 50.81 | b | 39.85 | 18.48 | a | 46.08 | |||||||
1935 | 14.82 | c | 22.41 | a | 33.57 | b | 42.53 | 50.47 | b | 61.48 | c | 73.83 | b | 68.69 | 60.81 | a | 49.77 | 34.52 | d | 20.81 | 44.48 | |||||
1936 | 10.02 | a | 4.91 | 33.76 | 40.23 | 61.97 | a | 63.92 | 74.17 | e | 72.74 | 63.89 | b | 46.73 | 32.22 | a | 26.48 | a | 44.25 | |||||||
1937 | 17.53 | a | 18.77 | 28.92 | 43.14 | a | 57.08 | 64.40 | 72.12 | a | 74.47 | 61.63 | 45.47 | a | ----- | z | 21.07 | j | 48.35 | b | ||||||
1938 | 16.52 | 25.50 | 38.55 | 46.08 | 55.00 | 63.92 | 69.90 | 70.62 | a | 59.40 | 52.68 | f | 35.98 | 22.03 | a | 45.77 | a | |||||||||
1939 | 22.87 | 18.22 | a | 29.42 | a | 40.85 | 58.83 | a | 66.78 | a | 70.83 | b | 68.40 | 64.36 | a | 49.28 | a | 37.12 | 30.29 | 46.44 | ||||||
1940 | 10.42 | a | 21.68 | a | 24.68 | 42.52 | 53.28 | a | 64.95 | a | 70.72 | d | 67.72 | a | 60.92 | 51.58 | 33.97 | a | 24.06 | 43.87 | ||||||
1941 | 22.42 | 19.00 | a | 26.74 | 51.20 | 61.02 | 67.15 | 71.89 | 70.10 | 64.38 | a | 51.61 | 38.93 | a | 29.60 | 47.84 | ||||||||||
1942 | 17.77 | a | 19.98 | 35.08 | 50.75 | 55.60 | 65.97 | 70.16 | 67.81 | 59.22 | 50.66 | 35.75 | 17.73 | 45.54 | ||||||||||||
1943 | 14.73 | c | 20.21 | 26.03 | 43.68 | 54.88 | a | 68.92 | 71.63 | 70.40 | 56.97 | 49.82 | 32.15 | 25.08 | a | 44.54 | ||||||||||
1944 | 26.10 | 22.21 | a | 27.71 | 41.82 | 61.22 | a | 68.43 | 69.32 | 69.82 | 62.72 | a | 49.53 | 41.67 | a | 17.21 | 46.48 | |||||||||
1945 | 14.00 | a | 19.93 | 43.21 | 46.28 | 51.97 | 59.86 | a | 66.89 | 68.68 | 60.13 | 47.27 | 35.03 | a | 16.23 | 44.12 | ||||||||||
1946 | 21.29 | 21.32 | 40.95 | 48.27 | 54.47 | 64.43 | 70.42 | 66.42 | 61.18 | 54.39 | 38.10 | 26.65 | 47.32 | |||||||||||||
1947 | 22.48 | 16.32 | 28.66 | 43.55 | 45.68 | t | ----- | z | 67.50 | y | 75.53 | 57.85 | j | 58.55 | 29.32 | 21.77 | a | 37.02 | d | |||||||
1948 | 13.13 | a | 18.07 | 29.95 | 52.16 | n | 54.19 | 66.28 | j | 74.18 | n | 70.65 | h | ----- | z | 49.91 | h | 40.32 | 24.37 | 30.01 | f | |||||
1949 | 21.24 | 19.55 | 31.35 | 45.63 | 58.12 | a | 69.45 | 72.42 | a | 70.18 | 56.76 | a | 52.27 | a | 36.27 | 25.52 | 46.56 | |||||||||
1950 | 21.13 | 20.30 | a | 26.27 | 39.52 | a | 55.66 | 65.75 | 67.69 | 64.11 | 59.41 | b | 54.71 | b | 30.79 | a | 13.82 | a | 43.26 | |||||||
1951 | 12.88 | c | 18.88 | 27.13 | 43.14 | b | 59.89 | 61.98 | a | 68.16 | 64.83 | b | 57.19 | c | 51.02 | 27.38 | a | ----- | z | 44.77 | a | |||||
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.19 | o | ----- | z |
1953 | 22.43 | d | 24.11 | 33.29 | 41.84 | a | 57.21 | b | 69.46 | c | 72.58 | r | 69.96 | r | 59.42 | k | 54.59 | b | 40.35 | 26.85 | 41.13 | c | ||||
1954 | 19.02 | 31.43 | 29.65 | a | 48.77 | 52.31 | 69.20 | 70.47 | 67.60 | 62.15 | 49.69 | ----- | z | ----- | z | 50.03 | b | |||||||||
1955 | 18.17 | a | 20.66 | 29.89 | 51.53 | 58.87 | d | 64.92 | 76.02 | 73.88 | b | 62.45 | 51.82 | 31.20 | 18.65 | a | 46.50 | |||||||||
1956 | 20.52 | 20.59 | 26.97 | 43.57 | 55.85 | 69.17 | 68.06 | 69.15 | 58.75 | 55.17 | a | 35.53 | 25.21 | 45.71 | ||||||||||||
1957 | 11.55 | 25.77 | 32.63 | 46.88 | 54.95 | 66.67 | 71.74 | 69.26 | 59.13 | 47.11 | 35.03 | 27.20 | a | 45.66 | ||||||||||||
1958 | 19.90 | 15.02 | 32.74 | 46.28 | 58.24 | 62.02 | 68.87 | 70.53 | 62.23 | 53.15 | 37.45 | 16.06 | 45.21 | |||||||||||||
1959 | 9.97 | 14.48 | 26.77 | 44.70 | g | 62.34 | 67.98 | 69.53 | 73.39 | 62.03 | 46.00 | 26.93 | a | 30.52 | 44.54 | a | ||||||||||
1960 | 22.47 | 20.97 | 20.25 | a | 48.43 | 54.97 | 63.63 | 68.55 | a | 70.25 | a | 63.37 | 49.20 | a | 38.43 | 20.97 | a | 45.12 | ||||||||
1961 | 17.34 | b | 27.98 | a | 36.33 | k | 41.83 | 53.90 | a | 66.58 | 70.73 | 69.42 | 63.43 | b | 51.42 | 35.70 | b | 19.39 | 47.07 | a | ||||||
1962 | 9.00 | j | 17.70 | a | 29.32 | 45.86 | b | 61.74 | 66.19 | a | 67.17 | d | 69.25 | a | 57.59 | a | 52.44 | 35.76 | i | 21.91 | c | 48.92 | b | |||
1963 | 5.73 | a | 13.20 | 32.68 | 47.90 | a | 54.66 | 67.80 | 73.43 | i | 66.55 | c | 60.10 | 58.63 | 40.53 | a | 12.02 | 41.80 | a | |||||||
1964 | 23.84 | 24.50 | 30.60 | 46.52 | c | 62.15 | 67.13 | 72.36 | c | 66.72 | d | 59.92 | 47.05 | a | 39.70 | 20.05 | b | 46.71 | ||||||||
1965 | 16.18 | 18.83 | b | 24.97 | 43.21 | a | 62.21 | b | 64.30 | 68.56 | 67.02 | a | 60.37 | 50.79 | ----- | z | 26.79 | n | 47.64 | b | ||||||
1966 | 9.83 | a | 21.16 | 35.97 | 43.72 | 52.68 | 68.13 | 74.17 | b | 68.35 | 60.20 | 49.34 | 37.10 | 21.79 | 45.20 | |||||||||||
1967 | 21.32 | 15.29 | 32.45 | 46.37 | 53.24 | 67.78 | 68.56 | 64.98 | 59.58 | 47.98 | 32.20 | 24.44 | 44.52 | |||||||||||||
1968 | 18.76 | 17.05 | 39.02 | 48.50 | 54.97 | 67.32 | 70.58 | 69.87 | 61.90 | 51.79 | 36.07 | 22.66 | 46.54 | |||||||||||||
1969 | 14.76 | 23.14 | 27.63 | 47.66 | a | 57.85 | 60.52 | 70.58 | 71.95 | 61.33 | 47.35 | 33.64 | a | 21.77 | 44.85 | |||||||||||
1970 | 8.63 | 19.30 | 29.68 | 50.03 | 59.44 | 67.98 | 73.73 | 70.79 | 62.55 | 52.45 | ----- | z | ----- | z | 49.46 | b | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 16.93 | 19.64 | 30.73 | 44.87 | 56.15 | 65.65 | 70.39 | 68.57 | 60.94 | 49.81 | 35.22 | 21.94 | 45.18 | |||||||||||||
S.D. | 6.26 | 5.47 | 4.71 | 3.42 | 3.49 | 3.09 | 2.48 | 2.57 | 2.53 | 3.63 | 3.79 | 5.11 | 1.50 | |||||||||||||
SKEW | -0.67 | -0.40 | 0.35 | 0.19 | 0.15 | -0.06 | 0.57 | 0.24 | -0.01 | -0.34 | -0.17 | -0.01 | 0.37 | |||||||||||||
MAX | 28.32 | 31.43 | 43.21 | 53.67 | 62.79 | 71.78 | 77.11 | 75.53 | 67.25 | 58.63 | 43.13 | 31.59 | 49.58 | |||||||||||||
MIN | -2.15 | 4.91 | 20.25 | 36.68 | 48.97 | 59.86 | 65.77 | 62.45 | 54.90 | 38.18 | 26.93 | 11.60 | 42.13 | |||||||||||||
YRS | 62 | 65 | 64 | 64 | 65 | 63 | 60 | 64 | 62 | 65 | 62 | 60 | 45 |