YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1901 | ----- | z | 22.44 | a | 23.35 | 30.11 | b | 42.58 | e | 46.77 | 57.93 | b | 58.21 | b | ----- | z | ----- | z | 31.59 | a | 16.13 | a | 36.57 | c | ||
1902 | 17.28 | b | 22.73 | b | 21.29 | c | 31.24 | a | 31.14 | q | 48.81 | d | 51.69 | b | 52.55 | 44.03 | 36.23 | a | 25.93 | 16.53 | a | 33.48 | a | |||
1903 | 15.39 | 6.71 | 26.58 | 32.21 | a | 37.68 | 48.11 | b | 53.59 | b | 54.94 | 40.65 | m | ----- | z | ----- | z | ----- | z | 34.40 | d | |||||
1904 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.61 | 53.55 | 47.36 | b | 32.00 | b | 24.67 | f | 17.00 | a | 40.50 | g | ||
1905 | 16.71 | 19.19 | b | 28.64 | c | 32.96 | b | 36.04 | e | 47.35 | g | 51.74 | 53.37 | d | 45.71 | b | 29.27 | e | 26.79 | a | 9.81 | d | 31.84 | a | ||
1906 | 14.55 | b | 22.73 | m | ----- | z | ----- | z | ----- | z | 45.39 | l | 51.93 | d | 51.61 | 43.50 | b | 31.17 | b | 24.75 | f | 23.24 | j | 38.55 | g | |
1907 | 18.57 | c | 26.48 | e | 28.48 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.52 | j |
1908 | ----- | z | ----- | z | ----- | z | 32.50 | 33.93 | a | 42.70 | c | 54.38 | b | 51.14 | b | 44.20 | 27.25 | c | 22.91 | g | 14.03 | a | 37.52 | d | ||
1909 | 19.73 | e | 15.37 | a | 22.36 | f | 27.79 | b | 36.03 | b | 47.96 | b | 55.17 | a | 54.32 | c | 44.36 | b | 34.71 | c | 26.41 | c | 6.79 | b | 33.51 | a |
1910 | 13.60 | a | 14.57 | 30.84 | 33.76 | a | 40.23 | 49.54 | d | 56.03 | 53.52 | d | 47.65 | d | 34.20 | a | 31.62 | n | ----- | z | 37.39 | b | ||||
1911 | ----- | z | 19.88 | d | 29.77 | 32.00 | d | 39.97 | a | 48.92 | d | 52.50 | a | ----- | z | ----- | z | 33.35 | k | 17.26 | k | 11.59 | d | 33.52 | e | |
1912 | 14.03 | 17.59 | 25.43 | a | 28.22 | c | 36.86 | c | 46.62 | i | 52.04 | d | 51.30 | d | 36.80 | j | 33.23 | i | ----- | z | 7.90 | a | 29.17 | d | ||
1913 | 7.97 | 15.96 | a | 20.67 | a | 31.52 | c | ----- | z | ----- | z | 52.35 | k | 54.38 | g | 43.04 | c | 31.20 | k | 29.56 | e | 12.50 | a | 23.03 | e | |
1914 | 17.70 | a | 14.57 | 24.58 | 33.40 | 42.10 | 47.80 | 53.39 | c | 53.23 | a | 46.52 | e | ----- | z | 25.50 | v | 13.74 | 34.70 | b | ||||||
1915 | 11.00 | a | 17.74 | i | 25.08 | g | 36.10 | a | 35.40 | f | 55.89 | c | 64.37 | a | 63.00 | 54.40 | o | 35.94 | 24.73 | 17.19 | 38.53 | d | ||||
1916 | 17.10 | 21.00 | 26.45 | 31.83 | 40.97 | a | 45.93 | 54.03 | 50.65 | 41.87 | 35.65 | 21.46 | b | 10.75 | c | 33.14 | ||||||||||
1917 | 6.77 | 13.75 | 10.27 | a | ----- | z | ----- | z | 41.00 | 46.35 | e | 43.03 | 39.20 | 25.13 | 21.31 | a | 14.33 | m | 27.42 | c | ||||||
1918 | 8.52 | f | 17.50 | 28.90 | 28.36 | e | 35.85 | e | 56.18 | b | 56.25 | o | 52.94 | 47.70 | 38.58 | 19.67 | c | 13.07 | c | 33.87 | b | |||||
1919 | 8.35 | 11.60 | c | 22.52 | 33.63 | 42.81 | e | 52.59 | c | 53.11 | v | 51.90 | 50.89 | c | 24.43 | c | ----- | z | 9.06 | n | 33.19 | c | ||||
1920 | 12.39 | c | 16.48 | 17.23 | 22.27 | ----- | z | 43.50 | 54.19 | e | 52.24 | b | 41.57 | ----- | z | 26.07 | 11.43 | a | 29.74 | b | ||||||
1921 | 17.06 | 19.50 | b | 30.74 | d | 32.00 | b | 53.60 | a | 61.31 | a | 58.95 | i | ----- | z | ----- | z | 33.74 | h | 27.93 | 25.53 | a | 33.46 | d | ||
1922 | 7.10 | 16.71 | 22.37 | a | 27.57 | 36.85 | e | ----- | z | ----- | z | 55.69 | o | 51.88 | e | 35.50 | m | 25.43 | 19.65 | 25.94 | d | |||||
1923 | 20.65 | 15.72 | c | 19.59 | i | 32.30 | g | 41.84 | 47.87 | 57.48 | 53.32 | ----- | z | ----- | z | ----- | z | 17.66 | b | 36.36 | e | |||||
1924 | 6.10 | 21.86 | a | 19.87 | ----- | z | ----- | z | 53.43 | p | 55.81 | 52.39 | 39.17 | 31.39 | 22.23 | 6.21 | b | 28.33 | c | |||||||
1925 | 6.43 | a | 17.96 | a | ----- | z | ----- | z | 41.58 | 42.42 | d | 54.65 | 55.39 | 43.07 | 32.94 | 19.80 | 15.48 | 32.97 | b | |||||||
1926 | 15.90 | j | 20.57 | 23.90 | k | 35.24 | a | 40.20 | a | ----- | z | ----- | z | ----- | z | 43.38 | i | 36.06 | 24.70 | 14.83 | a | 28.60 | f | |||
1927 | 21.29 | g | 17.93 | 21.65 | 28.63 | 39.39 | 48.37 | 57.06 | 54.06 | 44.47 | 35.00 | 26.83 | a | ----- | z | 37.34 | b | |||||||||
1928 | ----- | z | ----- | z | ----- | z | ----- | z | 45.00 | 45.30 | c | 52.90 | 51.81 | 45.60 | e | 36.00 | g | 25.20 | e | 26.96 | d | 41.82 | e | |||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.69 | a | 35.93 | b | 19.03 | 19.43 | a | 30.02 | h | |
1930 | 8.87 | 19.81 | a | 23.45 | 36.97 | a | 37.45 | b | 49.13 | 56.64 | c | 54.87 | a | 44.30 | 32.87 | 19.57 | 10.80 | a | 32.89 | |||||||
1931 | 13.26 | 24.46 | 19.55 | 31.80 | 31.71 | 51.40 | 57.84 | 55.13 | 48.93 | 36.94 | 21.47 | 8.26 | 33.40 | |||||||||||||
1932 | 6.48 | 20.10 | 20.73 | a | 30.33 | 38.13 | 44.93 | 55.39 | 53.19 | 44.53 | 31.68 | 23.52 | a | 7.55 | 31.38 | |||||||||||
1933 | 10.03 | 4.39 | 22.97 | 23.97 | 32.42 | 50.43 | 55.04 | c | 53.65 | 48.77 | 38.10 | 24.80 | 22.77 | a | 32.28 | |||||||||||
1934 | 19.16 | 27.32 | 31.29 | 37.23 | 47.10 | 48.33 | 60.39 | 57.39 | 45.10 | a | 36.90 | 25.43 | 17.29 | 37.75 | ||||||||||||
1935 | 16.71 | 17.85 | a | 21.55 | b | 29.53 | 35.71 | 47.77 | 54.94 | 53.97 | 46.63 | 33.06 | 21.07 | 14.23 | 32.75 | |||||||||||
1936 | 11.55 | 16.69 | 24.84 | 31.03 | a | 40.37 | a | 51.93 | b | 54.61 | 52.39 | 42.20 | 32.27 | a | 19.43 | 14.16 | 32.62 | |||||||||
1937 | -1.35 | 10.46 | 20.19 | 25.70 | 40.29 | 48.40 | 56.58 | 56.81 | ----- | z | ----- | z | ----- | z | 16.87 | a | 30.44 | c | ||||||||
1938 | 14.68 | 14.14 | 23.58 | ----- | z | 34.65 | 42.07 | 47.77 | 64.00 | ----- | z | ----- | z | 4.45 | s | 9.07 | a | 31.24 | d | |||||||
1939 | 2.90 | -2.82 | 20.19 | 26.50 | ----- | z | ----- | z | 51.03 | 48.84 | 44.21 | a | ----- | z | 17.00 | 11.65 | 24.39 | c | ||||||||
1940 | 9.48 | 15.07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.68 | 42.55 | a | 33.27 | a | 21.63 | 20.41 | i | 28.95 | f | ||||
1941 | 14.65 | 22.57 | 25.69 | b | 30.20 | 40.27 | a | 46.43 | 52.29 | 53.03 | 42.03 | a | 33.60 | a | 25.17 | 19.17 | b | 33.76 | ||||||||
1942 | 13.74 | 13.74 | a | 19.94 | 33.13 | 36.19 | 47.47 | 55.06 | 53.35 | 43.69 | a | 30.61 | 24.89 | b | 19.42 | 32.60 | ||||||||||
1943 | 17.19 | 19.71 | 24.39 | 36.10 | 38.68 | 46.37 | 56.48 | 53.03 | 47.07 | 35.23 | 23.63 | 18.32 | 34.68 | |||||||||||||
1944 | 10.39 | 15.72 | 20.04 | c | 28.67 | 38.67 | a | 43.57 | 53.55 | 51.94 | 48.20 | 38.60 | a | 24.87 | 16.26 | 32.54 | ||||||||||
1945 | 15.71 | 26.75 | x | 23.06 | 26.73 | 36.90 | 41.30 | 54.19 | 52.85 | d | 34.40 | 34.42 | 20.57 | 9.71 | 31.80 | a | ||||||||||
1946 | 5.84 | 9.07 | 23.57 | a | 38.57 | b | 32.06 | 42.93 | 52.00 | 49.47 | a | 39.33 | 27.97 | 17.07 | 9.07 | c | 28.91 | |||||||||
1947 | 3.86 | b | 11.79 | 19.74 | ----- | z | 37.10 | 42.75 | b | 51.61 | 52.39 | 50.50 | n | 38.71 | 30.00 | w | 10.11 | v | 32.24 | d | ||||||
1948 | 11.20 | a | 15.81 | c | 16.48 | 31.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.78 | h | ||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.19 | i | 32.23 | 28.27 | 16.29 | 25.59 | i | |||
1950 | 13.48 | 17.54 | 23.68 | 32.00 | 39.90 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 21.67 | h | ||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.48 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.48 | k | |
1952 | 15.23 | e | 10.79 | 16.00 | 29.73 | 37.10 | 45.60 | 51.48 | 52.45 | 46.67 | 36.61 | 18.77 | 13.35 | 31.15 | ||||||||||||
1953 | 15.74 | 15.39 | 21.68 | 27.80 | 32.84 | 48.73 | 56.03 | 49.65 | 44.70 | 31.81 | 22.87 | 7.61 | 31.24 | |||||||||||||
1954 | 15.43 | a | 20.82 | 17.10 | 31.70 | 37.48 | 43.50 | 53.23 | a | 48.74 | 41.33 | 31.27 | a | 21.53 | 9.68 | 30.99 | ||||||||||
1955 | 7.65 | 5.63 | a | 19.29 | 28.63 | 38.70 | a | 45.50 | 54.45 | 55.74 | 46.93 | 34.32 | 19.80 | 22.58 | 31.60 | |||||||||||
1956 | 23.52 | 11.88 | e | 24.90 | 32.24 | a | 41.84 | 52.80 | 54.81 | 51.39 | 49.53 | 36.35 | 18.47 | 12.97 | 34.22 | |||||||||||
1957 | 17.19 | 25.18 | 25.87 | 30.20 | 37.90 | 48.41 | a | 55.03 | 55.13 | 43.83 | 35.77 | 20.90 | 17.17 | a | 34.38 | |||||||||||
1958 | 13.42 | 22.81 | a | 20.89 | d | ----- | z | 46.91 | h | 47.39 | g | 53.37 | d | 51.08 | e | 44.60 | e | 32.96 | h | 26.35 | j | 24.58 | e | 32.96 | e | |
1959 | ----- | z | 17.44 | c | 24.27 | e | 34.61 | b | 43.36 | c | 56.50 | d | 54.96 | f | 54.33 | d | 45.92 | d | 32.19 | e | 22.85 | d | 14.41 | d | 34.59 | b |
1960 | 11.14 | b | 7.31 | c | 27.86 | c | 32.04 | c | 41.48 | d | 52.26 | c | ----- | z | ----- | z | 42.68 | k | 33.93 | d | 29.52 | g | 20.17 | g | 29.43 | e |
1961 | ----- | z | 22.67 | j | 25.82 | c | 33.71 | f | 39.70 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 25.82 | k |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.40 | 15.42 | 20.91 | j | ||
1964 | 6.78 | h | ----- | z | 20.11 | v | 29.29 | b | 39.42 | 45.23 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.98 | i | |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | 35.88 | g | 44.30 | 52.84 | 52.45 | 41.93 | a | 36.50 | e | 29.23 | 15.77 | 39.00 | e | |||||
1966 | 12.19 | d | 9.64 | 21.61 | 28.04 | d | 41.50 | c | 47.00 | e | 57.21 | g | 55.54 | g | 47.06 | m | 34.59 | n | 28.88 | f | ----- | z | 26.66 | f | ||
1967 | 14.74 | d | 18.68 | 27.92 | f | 25.14 | h | 38.23 | ----- | z | ----- | z | 55.00 | p | 48.07 | 35.50 | c | 28.80 | 9.39 | 27.63 | e | |||||
1968 | 10.55 | 22.86 | 26.19 | 28.27 | 37.81 | 48.43 | 55.10 | 49.97 | 42.37 | ----- | z | 22.97 | 11.39 | 32.35 | a | |||||||||||
1969 | 21.00 | 14.75 | 12.29 | 30.13 | 42.65 | 46.87 | 57.19 | 56.42 | 48.30 | 29.65 | 20.48 | a | 18.10 | 33.15 | ||||||||||||
1970 | 14.55 | 23.22 | e | 21.45 | i | 23.93 | b | 37.56 | d | 49.76 | i | 53.85 | e | 54.60 | f | 41.87 | 30.83 | a | 26.23 | 18.77 | a | 30.09 | c | |||
1971 | 18.17 | a | 19.40 | c | 23.07 | d | 33.79 | a | 38.45 | 50.88 | e | 58.42 | 56.14 | b | 38.84 | e | 34.09 | h | 23.00 | a | 13.21 | b | 33.94 | a | ||
1972 | 16.83 | a | 22.93 | b | 31.00 | e | 33.38 | a | 40.84 | 50.96 | d | 57.77 | 55.70 | a | 47.90 | a | 39.74 | 22.43 | b | ----- | z | 38.13 | a | |||
1973 | 7.88 | e | 16.96 | b | ----- | z | 28.45 | j | 38.90 | b | 46.44 | c | 54.00 | b | 54.00 | c | 42.20 | e | 34.83 | a | 24.25 | f | 15.42 | e | 34.52 | c |
1974 | 8.15 | d | 10.88 | b | 28.07 | c | 29.04 | d | 42.68 | c | 51.80 | 54.89 | d | 50.16 | 43.50 | b | 38.54 | e | 24.75 | b | 15.03 | 33.12 | ||||
1975 | 12.55 | 16.50 | 23.87 | 26.63 | 36.31 | e | 43.00 | i | 54.26 | 50.23 | 43.17 | 31.39 | 20.37 | 15.77 | 30.09 | a | ||||||||||
1976 | 9.26 | 22.72 | 18.19 | 31.53 | 41.16 | 45.83 | 55.19 | 51.65 | 45.47 | 30.39 | 24.70 | 13.77 | 32.49 | |||||||||||||
1977 | 11.81 | 18.89 | 18.26 | d | 33.33 | 38.29 | 52.10 | 54.45 | 54.65 | 47.07 | 35.83 | a | 23.47 | 18.65 | 33.90 | |||||||||||
1978 | 14.37 | d | 13.06 | j | 26.55 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.37 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.75 | 16.73 | 22.90 | 30.82 | 39.03 | 47.95 | 54.48 | 53.21 | 44.61 | 33.68 | 23.42 | 14.71 | 32.82 | |||||||||||||
S.D. | 4.87 | 5.64 | 4.44 | 3.38 | 3.74 | 4.12 | 2.76 | 3.14 | 3.25 | 3.41 | 3.34 | 4.68 | 1.69 | |||||||||||||
SKEW | -0.37 | -0.82 | -0.28 | -0.13 | 0.90 | 0.77 | 0.34 | 0.62 | -0.38 | -0.60 | 0.17 | 0.38 | 0.53 | |||||||||||||
MAX | 23.52 | 27.32 | 31.29 | 38.57 | 53.60 | 61.31 | 64.37 | 64.00 | 51.88 | 39.74 | 31.59 | 26.96 | 37.75 | |||||||||||||
MIN | -1.35 | -2.82 | 10.27 | 22.27 | 31.71 | 41.00 | 46.35 | 43.03 | 34.40 | 24.43 | 17.00 | 6.21 | 28.91 | |||||||||||||
YRS | 61 | 63 | 56 | 56 | 56 | 54 | 57 | 58 | 55 | 51 | 53 | 59 | 23 |