YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1902 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.17 | a | 31.00 | 26.46 | b | 2.59 | b | 25.56 | h | |
1903 | -3.00 | c | -5.00 | f | 23.87 | a | 27.38 | a | 41.00 | a | 44.35 | m | 52.71 | 47.84 | f | 42.81 | i | ----- | z | ----- | z | ----- | z | 28.39 | g | |
1904 | ----- | z | ----- | z | ----- | z | ----- | z | 39.37 | d | 47.00 | m | 50.90 | a | 47.29 | 43.69 | a | 37.67 | d | 22.57 | -11.71 | c | 32.82 | e | ||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.18 | s | 56.42 | 53.71 | 48.50 | d | 34.35 | ----- | z | ----- | z | 48.25 | h | |||
1906 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1907 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | -4.82 | 9.73 | a | 31.24 | e | 40.16 | 53.71 | b | 54.21 | c | 55.79 | b | 46.07 | a | 35.10 | 28.50 | 18.35 | 33.46 | a | |||||
1914 | 13.39 | h | -9.15 | a | 9.48 | 27.78 | c | 43.60 | f | 51.24 | a | 58.57 | c | 52.78 | d | 47.00 | c | 41.17 | b | 23.95 | j | 5.46 | g | 34.86 | d | |
1915 | -2.50 | e | 14.38 | d | 12.68 | 38.87 | 39.68 | 47.28 | a | 51.90 | 47.20 | a | 47.10 | ----- | z | 29.32 | b | 9.71 | 30.51 | a | ||||||
1916 | 1.36 | c | -0.30 | b | 5.82 | c | 26.65 | j | 42.07 | a | 48.67 | c | 61.52 | b | 55.03 | a | 44.25 | f | 34.65 | e | 20.39 | g | 2.26 | 27.90 | c | |
1917 | -6.23 | a | -11.19 | b | 16.29 | 27.53 | 33.97 | a | 46.47 | 56.10 | 48.23 | e | 50.39 | b | 29.10 | 25.27 | d | 2.23 | 26.51 | |||||||
1918 | -6.39 | -1.25 | 17.83 | a | 27.00 | 48.00 | 55.38 | f | 53.32 | 53.19 | 40.10 | 37.90 | 30.27 | 20.16 | 29.10 | a | ||||||||||
1919 | 12.65 | 7.14 | 17.35 | 30.11 | c | 39.06 | 58.00 | 55.94 | 51.07 | d | 47.10 | 33.07 | c | ----- | z | -2.89 | d | 31.69 | a | |||||||
1920 | -11.07 | a | -2.77 | c | ----- | z | ----- | z | 35.81 | 48.80 | 48.68 | 45.26 | 39.47 | ----- | z | ----- | z | ----- | z | 29.17 | e | |||||
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | 44.90 | a | 53.97 | 54.77 | 47.77 | a | 43.92 | e | 37.74 | 29.21 | a | 6.52 | 39.85 | d | ||||
1935 | -0.23 | 9.07 | 19.43 | c | 29.93 | 36.84 | 47.27 | 61.03 | 55.13 | 43.03 | a | 35.84 | 22.24 | a | 12.87 | a | 31.04 | |||||||||
1936 | 0.82 | c | -9.89 | a | 18.42 | 25.33 | 45.47 | a | 47.53 | 57.29 | 54.29 | 50.47 | 32.23 | 19.63 | 14.30 | a | 29.66 | |||||||||
1937 | -2.33 | a | 4.07 | a | 10.55 | 29.87 | 43.52 | 49.44 | c | 57.19 | e | 57.14 | c | 43.75 | j | 33.13 | 21.66 | a | 6.86 | c | 28.28 | a | ||||
1938 | 4.32 | 11.70 | a | 20.83 | a | 33.07 | 43.58 | 51.34 | a | 57.32 | 56.84 | 45.31 | a | 39.19 | 25.83 | 11.61 | 33.41 | |||||||||
1939 | 7.48 | b | -1.96 | 14.48 | b | 27.37 | 44.35 | 52.67 | 56.77 | 52.84 | 45.93 | 34.81 | 21.10 | 19.21 | b | 31.25 | ||||||||||
1940 | -0.87 | 8.71 | a | 8.81 | 26.92 | d | 37.90 | 51.07 | a | 54.42 | 54.48 | 46.90 | 37.10 | 23.37 | c | 13.70 | a | 30.21 | ||||||||
1941 | 8.90 | a | 1.62 | g | 10.87 | 35.03 | a | 45.13 | 52.77 | 56.16 | 52.69 | b | 49.83 | 37.48 | 26.47 | 19.57 | a | 35.90 | a | |||||||
1942 | 8.36 | i | 5.21 | 21.23 | 33.57 | 41.81 | 51.63 | 54.40 | a | 53.87 | 44.38 | a | ----- | z | 21.40 | 7.55 | 33.50 | b | ||||||||
1943 | 0.68 | 2.14 | 7.29 | 23.80 | 39.90 | 55.55 | a | 57.16 | 56.03 | 41.27 | 33.90 | 19.26 | c | 10.35 | 28.95 | |||||||||||
1944 | 14.10 | 10.11 | a | 14.07 | a | 26.24 | a | 45.97 | 53.53 | 54.94 | 55.26 | 48.17 | a | 32.67 | a | 30.03 | a | 8.23 | a | 32.78 | ||||||
1945 | -0.03 | b | 1.89 | a | 21.73 | a | 30.80 | 36.21 | b | 45.62 | a | 52.37 | a | 53.23 | a | 45.00 | 32.03 | a | 21.67 | f | 7.07 | d | 29.63 | a | ||
1946 | 4.52 | 4.77 | b | 26.76 | b | 31.07 | b | 36.97 | 49.76 | a | 56.00 | b | 50.07 | a | 44.28 | a | 36.59 | b | 21.59 | a | 6.86 | b | 30.77 | |||
1947 | 5.83 | b | 1.36 | 13.19 | 27.73 | d | 36.00 | d | 47.90 | 53.74 | 60.71 | c | 47.13 | 42.24 | b | 19.03 | a | 10.48 | d | 30.45 | ||||||
1948 | -6.35 | -0.48 | 10.90 | 33.57 | 38.39 | 50.70 | 54.71 | 53.52 | 46.50 | 33.61 | 28.80 | 7.23 | 29.26 | |||||||||||||
1949 | 6.80 | a | 3.11 | 15.55 | 28.07 | 40.63 | a | 54.13 | 57.97 | 53.23 | 40.70 | 36.71 | ----- | z | 8.47 | a | 31.40 | a | ||||||||
1950 | -4.87 | 3.21 | 8.42 | 22.00 | 38.52 | 49.33 | 50.10 | 47.03 | 44.30 | 38.47 | a | 16.63 | 2.03 | 26.26 | ||||||||||||
1951 | -1.97 | 4.48 | a | 12.23 | 30.93 | 46.16 | 48.33 | 54.48 | 52.55 | 43.67 | 37.29 | 14.24 | a | 7.90 | b | 29.19 | ||||||||||
1952 | 2.10 | 7.64 | a | 13.65 | 29.90 | 40.13 | 53.97 | 57.71 | 52.68 | 45.13 | 28.48 | 24.57 | 17.63 | a | 31.13 | |||||||||||
1953 | 10.13 | a | 3.68 | 19.13 | 29.90 | 41.32 | 52.57 | 54.29 | 55.47 | a | 45.07 | 38.23 | 25.87 | 12.58 | 32.35 | |||||||||||
1954 | 2.23 | 14.96 | 13.23 | 31.00 | 37.20 | a | 53.76 | a | 56.03 | 52.77 | 46.27 | 36.06 | 27.60 | 12.97 | 32.01 | |||||||||||
1955 | 0.42 | 1.82 | 10.23 | 36.66 | a | 43.77 | a | 50.93 | 60.16 | 57.97 | 44.77 | 37.42 | 19.00 | 3.23 | a | 30.53 | ||||||||||
1956 | 2.10 | -0.28 | 8.80 | a | 28.59 | a | 41.17 | a | 51.87 | 53.03 | 54.13 | 42.30 | 39.23 | 22.23 | 12.30 | a | 29.62 | |||||||||
1957 | -4.50 | a | 4.82 | 14.50 | a | 30.55 | a | 40.03 | 51.50 | 56.61 | 52.68 | 42.73 | 34.23 | a | 24.13 | 10.57 | a | 29.82 | ||||||||
1958 | 9.37 | a | 1.32 | 18.29 | 30.90 | a | 38.25 | c | 45.47 | 52.77 | 52.84 | 48.63 | 38.81 | 25.07 | 0.43 | a | 30.18 | |||||||||
1959 | -6.89 | c | -4.30 | a | 11.15 | d | 31.13 | 45.65 | 52.20 | 53.94 | 59.90 | 48.43 | 34.74 | 14.30 | 19.71 | 30.00 | ||||||||||
1960 | 7.61 | 6.41 | 3.32 | 33.60 | 42.48 | 48.60 | 52.39 | 56.26 | 49.00 | 35.90 | 26.80 | 7.32 | 30.81 | |||||||||||||
1961 | 1.84 | 10.25 | 22.42 | e | 28.70 | 37.45 | 50.27 | 55.35 | 55.00 | 47.97 | 37.74 | 23.00 | 9.16 | 31.60 | ||||||||||||
1962 | -0.10 | 1.57 | 16.42 | 29.80 | 48.23 | 50.43 | 53.00 | 52.74 | 44.40 | 38.97 | 26.80 | 8.55 | 30.90 | |||||||||||||
1963 | -5.87 | -5.07 | 15.77 | 32.57 | 40.10 | 51.50 | 55.58 | 51.55 | 46.13 | 42.06 | 29.27 | 1.61 | 29.60 | |||||||||||||
1964 | 8.26 | 5.34 | 14.10 | 32.33 | 46.03 | 50.40 | 57.39 | 52.63 | a | 46.77 | 33.52 | 27.27 | 4.23 | 31.52 | ||||||||||||
1965 | -0.35 | -1.29 | 8.48 | 29.80 | 46.74 | 49.77 | 52.97 | 53.16 | 43.57 | 36.26 | 23.80 | 18.55 | 30.12 | |||||||||||||
1966 | -7.45 | 7.32 | 21.16 | 28.47 | 36.03 | 51.27 | 56.94 | 52.45 | 43.57 | 33.87 | 24.73 | 9.84 | 29.85 | |||||||||||||
1967 | 6.48 | -5.36 | 16.19 | 30.73 | 35.26 | 52.07 | 52.23 | 48.90 | 42.63 | 35.10 | a | 19.40 | 9.84 | 28.62 | ||||||||||||
1968 | 1.87 | -0.55 | 22.06 | 31.53 | 39.65 | 51.50 | 55.29 | 54.16 | 48.50 | 40.68 | 24.97 | 8.48 | 31.51 | |||||||||||||
1969 | 2.87 | 5.18 | 11.06 | 32.53 | 42.65 | 46.33 | 54.61 | 54.68 | 45.73 | 34.32 | 21.20 | 11.13 | 30.19 | |||||||||||||
1970 | -4.65 | -1.29 | 9.87 | 31.77 | 43.32 | 52.17 | 56.23 | 52.52 | 47.77 | 39.94 | 24.00 | 8.90 | 30.05 | |||||||||||||
1971 | -8.19 | 2.07 | 11.06 | 28.23 | 37.00 | 54.47 | 52.35 | 50.10 | 47.90 | 44.74 | 24.87 | 10.97 | 29.63 | |||||||||||||
1972 | -8.29 | -2.14 | 11.13 | 26.79 | a | 43.32 | 47.80 | 54.23 | 54.87 | 45.30 | 33.16 | 25.10 | 3.68 | 27.91 | ||||||||||||
1973 | 6.03 | 9.25 | 27.74 | 31.70 | 40.26 | 53.30 | 55.13 | 55.77 | 44.00 | 39.45 | b | 23.13 | 5.55 | 32.61 | ||||||||||||
1974 | -1.19 | -6.29 | 13.77 | a | 29.00 | 38.16 | 46.30 | 55.68 | 51.47 | a | 37.67 | 30.87 | 23.13 | 12.00 | 27.55 | |||||||||||
1975 | 0.48 | 1.64 | 6.50 | a | 23.97 | a | 44.74 | 52.57 | 57.37 | a | 51.94 | 39.87 | 34.61 | 25.50 | 4.26 | 28.62 | ||||||||||
1976 | -5.94 | 8.86 | a | 12.52 | 31.93 | a | 38.16 | 51.24 | a | 52.19 | 48.87 | 38.72 | a | 27.00 | 11.69 | a | -7.43 | a | 25.65 | |||||||
1977 | -16.53 | a | 7.74 | a | 23.87 | 31.24 | a | 45.28 | b | 48.93 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 23.42 | f | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.27 | 2.46 | 14.59 | 29.97 | 41.01 | 50.74 | 55.08 | 53.05 | 45.10 | 35.89 | 23.62 | 8.58 | 30.06 | |||||||||||||
S.D. | 6.38 | 5.97 | 5.58 | 3.14 | 3.63 | 2.72 | 2.54 | 3.13 | 3.01 | 3.57 | 4.21 | 6.53 | 1.74 | |||||||||||||
SKEW | -0.07 | -0.16 | 0.40 | 0.06 | 0.15 | 0.03 | 0.13 | -0.24 | -0.43 | -0.08 | -0.75 | -0.54 | -0.57 | |||||||||||||
MAX | 14.10 | 14.96 | 27.74 | 38.87 | 48.23 | 58.00 | 61.52 | 60.71 | 50.47 | 44.74 | 30.27 | 20.16 | 33.41 | |||||||||||||
MIN | -16.53 | -11.19 | 3.32 | 22.00 | 33.97 | 45.47 | 48.68 | 45.26 | 37.67 | 27.00 | 11.69 | -11.71 | 25.65 | |||||||||||||
YRS | 49 | 50 | 51 | 50 | 53 | 51 | 54 | 53 | 52 | 51 | 47 | 51 | 38 |