YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1902 | ----- | z | ----- | z | ----- | z | 37.97 | 55.52 | 58.75 | 67.97 | 62.95 | 50.70 | 41.55 | 24.56 | e | 5.06 | 45.00 | c | ||||||||
1903 | 2.98 | a | 0.50 | 20.35 | 40.90 | a | 55.10 | 60.91 | a | 65.13 | 61.85 | 50.95 | 43.67 | a | 21.19 | a | 3.96 | c | 35.62 | |||||||
1904 | -0.84 | -6.93 | h | 16.97 | a | 36.50 | 53.80 | a | 61.05 | 62.81 | 61.63 | 53.50 | 44.40 | f | 34.89 | b | 11.32 | 39.16 | b | |||||||
1905 | -2.05 | 5.95 | 28.18 | 39.83 | 49.97 | b | 59.02 | 64.50 | 66.47 | 60.78 | c | 39.59 | b | 28.47 | 12.98 | d | 37.81 | |||||||||
1906 | 10.38 | a | -0.71 | k | 19.27 | e | 46.83 | 50.84 | 62.95 | 65.65 | 65.48 | 62.48 | 42.16 | 27.24 | a | 4.28 | a | 41.60 | a | |||||||
1907 | -7.36 | b | 5.40 | d | 18.22 | a | 31.19 | a | 42.82 | 62.07 | 64.97 | 62.62 | c | 51.42 | 42.15 | 27.90 | 17.55 | 34.91 | ||||||||
1908 | 11.13 | 10.72 | 14.61 | 42.91 | a | 51.81 | 62.12 | 67.11 | 62.82 | 60.85 | 44.05 | 30.05 | a | 11.06 | 39.10 | |||||||||||
1909 | 1.97 | 5.40 | g | 21.68 | 34.25 | t | ----- | z | 63.64 | e | 67.44 | 67.60 | 58.37 | 43.50 | a | 27.20 | 4.13 | a | 39.50 | c | ||||||
1910 | 7.74 | 2.11 | 38.29 | 44.87 | 49.40 | 67.27 | 68.24 | 62.73 | 55.82 | 47.37 | 20.10 | 7.03 | 39.25 | |||||||||||||
1911 | -5.69 | b | 4.12 | 25.47 | 41.12 | 55.98 | 67.05 | a | 63.45 | 61.88 | a | 52.95 | 42.56 | 14.23 | 11.40 | 36.21 | ||||||||||
1912 | -12.92 | 7.16 | 15.63 | 43.52 | 55.67 | a | 61.67 | 65.87 | 61.42 | 52.69 | a | 44.06 | 30.17 | 14.74 | 36.64 | |||||||||||
1913 | -3.18 | a | 3.41 | 13.73 | 46.52 | 49.84 | 66.23 | 64.06 | 67.20 | a | 56.78 | 38.26 | 32.53 | a | 20.18 | 37.96 | ||||||||||
1914 | 10.50 | -7.12 | 23.98 | 38.03 | 54.94 | 62.10 | 69.97 | 61.98 | 59.58 | 51.19 | 28.95 | a | 3.37 | a | 38.12 | |||||||||||
1915 | 1.18 | 16.11 | 24.00 | 49.08 | 51.06 | 57.00 | 62.52 | 63.55 | 55.68 | 46.62 | a | 26.13 | 12.84 | 38.81 | ||||||||||||
1916 | -7.23 | -1.29 | 15.47 | 37.75 | 50.77 | 58.02 | 72.56 | 64.63 | 54.07 | 37.85 | 26.68 | -0.35 | a | 34.08 | ||||||||||||
1917 | -5.52 | -5.86 | 20.92 | 37.62 | 50.85 | 58.55 | 68.45 | 62.89 | 55.68 | 32.26 | 33.37 | -1.28 | a | 33.99 | ||||||||||||
1918 | -4.21 | 7.39 | 35.05 | 42.05 | 52.47 | 61.75 | 63.87 | 66.40 | 49.72 | 45.66 | 31.25 | 13.00 | 38.70 | |||||||||||||
1919 | 10.92 | 6.11 | a | 18.02 | 42.20 | 55.65 | 66.50 | 68.84 | 65.16 | 57.77 | 33.39 | 13.03 | 2.13 | 36.64 | ||||||||||||
1920 | -3.77 | 5.89 | a | 20.81 | 32.15 | 54.34 | 62.67 | 65.42 | 66.95 | 60.12 | 49.69 | 27.25 | 14.13 | 37.97 | ||||||||||||
1921 | 11.63 | 13.38 | 21.10 | 42.25 | 55.53 | 67.37 | 71.60 | 65.23 | 57.63 | 45.97 | 18.85 | 11.23 | 40.15 | |||||||||||||
1922 | 4.05 | 1.20 | 25.63 | 42.12 | 58.92 | 63.87 | 65.27 | 68.29 | 58.38 | 45.76 | 32.77 | 4.03 | a | 39.19 | ||||||||||||
1923 | 5.32 | 1.39 | 13.78 | a | 36.52 | 53.53 | 66.45 | 69.44 | 60.11 | 58.75 | 44.03 | 34.05 | 19.97 | a | 38.61 | |||||||||||
1924 | -3.06 | 14.52 | 26.03 | 37.68 | 44.21 | 58.83 | 63.66 | 62.48 | 53.43 | 51.11 | 24.83 | -0.92 | 36.07 | |||||||||||||
1925 | 4.53 | 12.44 | a | 24.50 | 47.07 | 51.68 | 61.53 | 65.05 | 67.21 | 57.30 | 33.73 | 25.98 | 11.07 | a | 38.51 | |||||||||||
1926 | 11.60 | 16.71 | 21.69 | 39.75 | 57.73 | 57.65 | 66.83 | a | 64.50 | 52.65 | 41.39 | 18.80 | 4.94 | 37.85 | ||||||||||||
1927 | 5.02 | 10.86 | 29.26 | 40.48 | 48.60 | 61.10 | 65.52 | a | 62.07 | b | 57.77 | 46.48 | 19.67 | -2.58 | a | 37.02 | ||||||||||
1928 | 7.76 | 15.62 | 23.81 | 35.37 | 56.40 | 58.57 | 67.15 | 64.34 | 53.50 | 43.13 | 29.98 | 19.25 | a | 39.57 | ||||||||||||
1929 | -11.31 | -0.27 | 28.11 | 41.08 | 49.06 | 61.58 | 68.00 | 66.32 | 53.22 | a | 45.65 | a | 22.22 | 7.27 | a | 35.91 | ||||||||||
1930 | -2.24 | f | 15.24 | a | 21.40 | 44.05 | 51.78 | a | 64.13 | 69.77 | 68.94 | 55.93 | b | 41.79 | 28.00 | 14.53 | 43.23 | a | ||||||||
1931 | 14.40 | 24.05 | 25.65 | 42.15 | 51.11 | 66.00 | 69.52 | 66.32 | 61.27 | b | 47.73 | a | 31.42 | 17.69 | 43.11 | |||||||||||
1932 | 9.89 | 8.66 | 16.76 | 41.58 | 55.81 | 68.15 | 68.61 | 68.28 | a | 56.40 | 39.60 | 21.47 | 8.13 | 38.61 | ||||||||||||
1933 | 7.82 | 7.54 | d | 25.10 | a | 39.48 | 56.47 | 70.10 | 71.02 | 68.24 | 60.22 | 39.00 | 21.38 | 2.53 | 39.08 | |||||||||||
1934 | 9.76 | 9.00 | 21.68 | 40.93 | 61.27 | 62.88 | 67.81 | 65.29 | 53.00 | a | 47.89 | 32.45 | 8.95 | a | 40.08 | |||||||||||
1935 | -3.26 | 24.22 | e | 25.15 | 37.92 | 50.81 | 59.48 | 72.44 | 65.06 | 54.22 | 44.26 | 14.12 | 8.85 | 37.77 | ||||||||||||
1936 | -9.23 | -13.00 | 18.81 | 31.33 | 58.19 | 61.04 | b | 77.27 | 68.63 | a | 60.29 | a | 40.55 | 23.03 | 11.84 | 35.73 | ||||||||||
1937 | -9.68 | 2.96 | 18.90 | 37.78 | 56.05 | a | 61.83 | 67.89 | i | 70.56 | 56.47 | a | 42.16 | 24.80 | 8.82 | a | 33.70 | a | ||||||||
1938 | 1.81 | d | 7.20 | a | 32.92 | 40.52 | 50.40 | b | 62.42 | 67.70 | a | 69.23 | 59.90 | 50.76 | b | 20.65 | 12.40 | a | 39.66 | |||||||
1939 | 7.23 | -3.27 | b | 18.68 | 39.55 | a | 59.74 | 62.17 | 71.10 | 69.40 | 57.90 | 40.36 | b | 33.59 | a | 23.65 | 40.01 | |||||||||
1940 | 2.45 | 12.55 | a | 17.11 | 37.52 | a | 53.62 | a | 60.58 | 69.21 | 64.60 | 60.29 | a | 49.31 | 22.68 | 14.62 | a | 38.71 | ||||||||
1941 | 7.03 | a | 5.79 | 19.53 | b | 44.85 | 57.95 | 63.88 | 71.27 | 70.48 | 55.97 | 44.76 | 29.30 | 18.27 | 40.76 | |||||||||||
1942 | 14.56 | d | 12.05 | 30.61 | 47.02 | 52.05 | 61.60 | 66.18 | 66.13 | 53.40 | 45.90 | a | 25.87 | 5.23 | c | 40.05 | ||||||||||
1943 | -3.94 | 8.58 | c | 13.27 | 42.72 | 50.60 | 62.03 | 70.30 | a | 65.82 | 53.52 | 46.29 | 24.90 | 14.66 | 37.40 | |||||||||||
1944 | 14.98 | 6.26 | b | 15.39 | 37.73 | 54.74 | 59.87 | 64.23 | 62.18 | 52.97 | 45.68 | 31.27 | 13.53 | 38.23 | ||||||||||||
1945 | 7.81 | 11.34 | 33.44 | 37.73 | 46.47 | 58.73 | 66.37 | 65.95 | 53.62 | 41.94 | 23.50 | a | 5.73 | e | 37.72 | |||||||||||
1946 | 3.10 | a | 2.52 | a | 31.39 | 45.30 | 50.81 | 61.15 | 68.03 | a | 63.63 | 54.23 | 40.40 | 23.88 | 7.45 | 37.66 | ||||||||||
1947 | 9.72 | a | 4.50 | 20.44 | 37.63 | 47.47 | 59.18 | 68.24 | 68.98 | 54.30 | 52.21 | 20.32 | 8.45 | 37.62 | ||||||||||||
1948 | 0.95 | 3.33 | 16.27 | 40.75 | 55.61 | 64.10 | a | 68.07 | d | 69.21 | 63.26 | a | 46.46 | h | 29.63 | g | 8.20 | d | 38.98 | b | ||||||
1949 | 0.38 | b | -2.31 | j | 17.69 | e | 48.67 | l | 56.28 | d | 64.23 | h | 70.17 | e | ----- | z | 53.04 | r | 44.12 | f | 31.70 | h | 8.60 | e | 30.62 | g |
1950 | -10.41 | i | 2.97 | m | 12.57 | j | ----- | z | 49.19 | b | 63.70 | 65.94 | e | 62.56 | 57.77 | f | 45.74 | b | ----- | z | ----- | z | 57.43 | g | ||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.68 | t | 65.12 | c | 53.39 | g | 45.65 | r | ----- | z | ----- | z | 65.12 | k |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | 54.55 | 65.22 | a | 67.44 | 65.94 | 59.98 | 40.85 | 29.52 | c | 17.60 | 50.14 | d | ||||||
1953 | 9.20 | a | 12.64 | 25.55 | 37.72 | a | 53.66 | b | 62.40 | 66.15 | 69.23 | g | 56.60 | 51.82 | 34.56 | d | 12.58 | 38.44 | a | |||||||
1954 | -5.40 | 22.93 | a | 22.87 | 38.79 | a | 49.63 | 63.18 | 69.31 | b | 65.39 | 55.77 | 43.55 | 32.37 | 17.35 | 39.64 | ||||||||||
1955 | 4.40 | a | 2.54 | 9.32 | 48.70 | 58.69 | 64.45 | a | 71.82 | 70.77 | a | 56.53 | 46.50 | 16.80 | 2.61 | 37.76 | ||||||||||
1956 | 4.27 | 0.72 | 14.83 | a | 31.95 | 52.00 | 68.38 | a | 64.89 | 65.69 | 52.97 | 50.11 | 29.70 | 12.00 | a | 37.29 | ||||||||||
1957 | -0.50 | 8.73 | 25.15 | 40.78 | 54.94 | 59.43 | a | 71.27 | 66.40 | a | 54.35 | 45.27 | 27.27 | 18.88 | c | 39.33 | ||||||||||
1958 | 15.85 | 10.54 | 29.26 | 43.82 | 55.76 | 58.10 | 65.16 | 65.63 | 58.13 | 47.05 | 25.80 | 4.40 | 39.96 | |||||||||||||
1959 | -3.02 | 2.29 | 24.73 | a | 40.82 | 53.44 | 65.48 | 68.89 | 69.34 | 56.48 | 38.73 | 17.78 | 20.94 | 37.99 | ||||||||||||
1960 | 6.58 | 8.52 | 14.06 | 40.23 | 54.81 | 62.20 | 68.76 | 69.55 | 58.83 | 46.00 | 28.27 | 7.16 | 38.75 | |||||||||||||
1961 | 4.29 | 14.70 | 31.29 | 36.67 | 53.29 | 67.37 | 68.18 | 71.63 | 55.80 | 45.66 | 27.45 | 6.90 | 40.27 | |||||||||||||
1962 | 0.06 | 2.89 | a | 20.08 | 37.05 | 53.53 | 64.92 | 66.21 | 68.15 | 55.00 | 48.19 | 31.23 | 13.76 | 38.42 | ||||||||||||
1963 | -0.40 | 8.18 | 30.29 | 42.70 | 52.74 | 67.64 | a | 70.56 | 68.00 | 61.47 | 55.47 | 31.31 | a | 4.27 | 41.02 | |||||||||||
1964 | 10.52 | a | 14.48 | 18.48 | 43.02 | 58.10 | 62.31 | a | 70.58 | 64.19 | 54.85 | 44.76 | 27.83 | 2.53 | 39.30 | |||||||||||
1965 | -3.45 | 5.61 | a | 14.53 | 40.50 | 53.79 | 64.05 | 66.95 | 65.77 | 48.55 | 45.95 | a | 23.28 | 17.18 | a | 36.89 | ||||||||||
1966 | -10.45 | 1.32 | 25.89 | 36.92 | 50.23 | 64.72 | 70.77 | 65.05 | 58.25 | 43.95 | a | 20.82 | 7.79 | 36.27 | ||||||||||||
1967 | 5.03 | -2.05 | 20.50 | a | 37.05 | a | 49.23 | 61.95 | 66.71 | 65.56 | 60.85 | 42.27 | a | 27.25 | 12.50 | 37.24 | ||||||||||
1968 | 2.27 | 3.45 | 28.84 | 43.28 | 52.81 | 62.15 | 66.82 | 64.48 | 57.83 | 44.94 | 29.25 | 8.71 | 38.74 | |||||||||||||
1969 | -3.02 | 10.00 | a | 12.73 | 44.08 | 55.18 | 56.38 | 66.65 | 71.89 | 58.33 | 39.40 | 28.17 | 17.27 | i | 39.98 | a | ||||||||||
1970 | -1.69 | 5.54 | 10.18 | 35.77 | 51.42 | 68.30 | 71.02 | 67.81 | 58.15 | 45.08 | 26.00 | 5.97 | 36.96 | |||||||||||||
1971 | -6.05 | 9.57 | 23.58 | 41.77 | 53.50 | 66.58 | f | 63.83 | a | 67.29 | 57.35 | 46.18 | 26.68 | 9.66 | 35.76 | a | ||||||||||
1972 | -4.81 | g | 1.60 | 20.32 | 38.87 | 59.50 | 65.32 | 64.66 | 68.16 | 54.12 | b | 42.64 | b | 25.12 | 5.00 | b | 40.48 | a | ||||||||
1973 | 9.63 | 13.59 | 35.79 | 40.63 | 54.28 | a | 65.23 | 66.48 | b | 71.11 | 55.85 | 49.40 | a | 23.37 | 8.77 | 41.18 | ||||||||||
1974 | -2.29 | 7.70 | 18.89 | 39.02 | 50.43 | a | 64.37 | 71.88 | a | 63.15 | 53.00 | 45.98 | 25.62 | j | 18.40 | b | 39.14 | a | ||||||||
1975 | 8.06 | 6.91 | a | 15.43 | a | 35.25 | 55.77 | 63.33 | 70.63 | 65.44 | 54.45 | 47.90 | 29.93 | 11.35 | 38.71 | |||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 2.49 | 7.10 | 21.96 | 40.22 | 53.25 | 62.76 | 67.78 | 65.94 | 56.24 | 44.38 | 26.16 | 10.00 | 38.22 | |||||||||||||
S.D. | 7.11 | 6.90 | 6.37 | 3.88 | 3.54 | 3.08 | 2.80 | 2.78 | 3.18 | 4.35 | 5.14 | 5.93 | 1.74 | |||||||||||||
SKEW | -0.13 | 0.06 | 0.40 | -0.04 | -0.32 | 0.14 | 0.46 | 0.14 | 0.00 | -0.33 | -0.52 | 0.10 | -0.11 | |||||||||||||
MAX | 15.85 | 24.22 | 38.29 | 49.08 | 61.27 | 70.10 | 77.27 | 71.89 | 63.26 | 55.47 | 34.89 | 23.65 | 43.11 | |||||||||||||
MIN | -12.92 | -13.00 | 9.32 | 31.19 | 42.82 | 56.38 | 62.52 | 60.11 | 48.55 | 32.26 | 13.03 | -2.58 | 33.99 | |||||||||||||
YRS | 68 | 66 | 70 | 69 | 72 | 71 | 72 | 72 | 71 | 70 | 69 | 71 | 58 |