YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | 26.17 | g | 29.18 | 30.61 | 46.30 | 50.35 | 62.95 | j | 63.29 | 62.00 | 57.10 | 40.65 | 33.93 | 34.19 | 44.76 | b | ||||||||||
1907 | 33.00 | 30.50 | 39.61 | 41.52 | a | 46.19 | 59.62 | a | 63.06 | 65.32 | 60.37 | 50.90 | 35.37 | 29.42 | 46.24 | |||||||||||
1908 | 27.60 | a | 29.45 | 39.10 | 44.10 | 48.87 | 61.53 | 63.10 | a | 63.45 | 54.93 | 41.32 | 29.90 | 26.68 | 44.17 | |||||||||||
1909 | 28.65 | 26.50 | 45.97 | a | 55.18 | h | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.70 | i | ||
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | 48.14 | p | 53.83 | a | 62.57 | 64.39 | 63.32 | c | 56.69 | d | 45.72 | b | 31.17 | 26.48 | 50.52 | d | ||||
1917 | 28.64 | f | 32.68 | 33.37 | d | 41.87 | 47.00 | 55.17 | 62.33 | a | 60.10 | b | 56.67 | 44.20 | k | 35.63 | 26.55 | 45.14 | b | |||||||
1918 | 21.29 | 32.82 | 40.35 | 41.23 | 53.77 | 62.00 | 66.61 | 64.83 | b | ----- | z | ----- | z | ----- | z | ----- | z | 47.86 | d | |||||||
1919 | ----- | z | ----- | z | ----- | z | 50.00 | u | 52.29 | 57.24 | a | 63.48 | 63.71 | g | 59.24 | a | 52.59 | b | 33.04 | d | 25.52 | d | 49.06 | e | ||
1920 | 27.74 | h | 32.63 | b | 33.31 | e | 35.33 | f | 53.61 | 60.07 | 63.50 | a | 62.83 | b | 57.64 | b | 45.61 | c | 34.03 | a | 24.66 | b | 46.79 | b | ||
1921 | 30.15 | d | 30.96 | 39.97 | 37.17 | 48.42 | 54.00 | 57.71 | 56.45 | b | 54.93 | b | 38.61 | 27.50 | 23.33 | m | 43.26 | a | ||||||||
1922 | 15.63 | a | 22.79 | 26.90 | b | 39.00 | 47.06 | 53.23 | 56.90 | 56.55 | 57.37 | 45.39 | 33.68 | e | ----- | z | 41.32 | a | ||||||||
1923 | 30.74 | 29.23 | b | ----- | z | ----- | z | 51.47 | n | 68.27 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 42.75 | i | ||
1924 | 22.69 | r | 28.18 | a | 31.45 | b | 41.67 | 48.43 | a | 61.10 | 63.39 | 64.03 | 49.72 | a | 42.97 | 34.29 | i | ----- | z | 47.88 | c | |||||
1925 | ----- | z | 32.73 | q | 38.00 | e | 44.67 | i | 53.94 | ----- | z | ----- | z | 62.39 | 58.25 | b | 39.78 | d | 32.63 | 24.13 | 44.16 | e | ||||
1926 | 23.90 | a | 31.75 | 33.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.87 | i | ||
1927 | ----- | z | ----- | z | ----- | z | 40.62 | a | 49.89 | c | 59.43 | 63.48 | 64.00 | 57.07 | 43.90 | b | 35.58 | d | 23.68 | 48.63 | c | |||||
1928 | 25.65 | 28.00 | ----- | z | ----- | z | 53.25 | c | 60.48 | a | 65.65 | 63.10 | 55.07 | a | 46.52 | 35.23 | h | 24.32 | 46.89 | c | ||||||
1929 | 23.97 | 21.41 | a | 35.61 | c | 43.23 | 51.63 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 26.63 | 21.61 | 32.01 | e | ||||
1930 | 18.00 | d | 27.26 | a | 29.61 | 43.86 | b | 50.00 | a | 60.76 | a | ----- | z | 62.73 | p | 53.75 | r | 46.77 | a | 31.30 | g | 22.26 | 37.31 | d | ||
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | 35.67 | p | 42.63 | 52.68 | 61.87 | 65.06 | 63.88 | f | 55.47 | 41.29 | 25.40 | 21.13 | h | 49.20 | e | |||||||
1933 | 22.52 | 21.74 | a | 32.52 | 34.74 | k | 54.56 | v | 60.80 | 65.00 | c | 63.57 | c | 61.33 | 48.67 | p | 30.72 | e | 22.89 | v | 44.77 | d | ||||
1934 | 19.65 | 24.82 | 30.42 | 43.43 | 53.81 | 61.63 | 63.32 | 63.39 | 55.47 | m | 45.59 | i | 34.44 | c | 24.03 | 41.89 | b | |||||||||
1935 | 25.06 | 25.20 | h | 36.76 | b | ----- | z | 51.16 | 60.71 | p | ----- | z | 64.97 | a | 53.90 | ----- | z | ----- | z | ----- | z | 46.37 | g | |||
1936 | 21.36 | q | 25.52 | 35.10 | u | ----- | z | ----- | z | ----- | z | ----- | z | 62.26 | d | 59.10 | 42.64 | c | 32.73 | ----- | z | 44.45 | g | |||
1937 | 20.63 | d | ----- | z | ----- | z | 42.20 | 53.39 | 61.00 | d | 64.10 | 64.71 | ----- | z | ----- | z | ----- | z | 28.93 | b | 47.85 | e | ||||
1938 | 28.48 | 35.68 | 36.55 | 42.37 | 50.13 | 62.77 | 64.19 | j | 61.26 | 55.78 | g | 59.05 | k | ----- | z | ----- | z | 45.32 | e | |||||||
1939 | 26.96 | f | 23.36 | 35.47 | a | 43.27 | 51.39 | 61.80 | e | ----- | z | 57.91 | t | 55.20 | ----- | z | 33.03 | 28.97 | 41.56 | d | ||||||
1940 | 20.65 | 28.41 | 35.07 | c | 42.45 | a | 51.64 | i | 56.85 | d | 62.23 | 60.94 | 54.97 | 45.30 | d | 30.76 | a | 27.78 | h | 43.76 | b | |||||
1941 | 27.47 | a | 32.18 | 32.10 | 42.90 | 53.16 | 56.00 | 62.33 | j | 62.52 | 60.41 | h | 51.30 | a | 34.23 | d | 28.58 | e | 42.04 | b | ||||||
1942 | 24.86 | b | 26.04 | 31.57 | a | 43.13 | 50.27 | e | 60.73 | 62.68 | c | 62.26 | 53.33 | 43.55 | 34.63 | 29.48 | 43.54 | |||||||||
1943 | 25.65 | 28.61 | 30.50 | g | 44.33 | 50.71 | 63.40 | 64.30 | d | 64.52 | 56.95 | i | 44.17 | b | 31.44 | n | 26.97 | 45.85 | c | |||||||
1944 | 24.35 | 33.41 | 32.58 | 37.83 | 50.97 | 63.20 | 64.52 | 63.74 | 55.63 | 46.35 | 33.93 | 25.55 | 44.34 | |||||||||||||
1945 | 26.35 | 30.39 | 36.13 | 40.59 | a | 52.32 | 55.31 | a | 62.71 | 64.17 | a | 57.07 | 46.58 | 34.30 | 26.68 | 44.38 | ||||||||||
1946 | 25.97 | 27.43 | 33.00 | 44.93 | 50.58 | 62.07 | 64.55 | 65.18 | c | 60.70 | 51.29 | 33.77 | 30.56 | d | 45.83 | |||||||||||
1947 | 25.30 | a | 24.59 | a | 32.52 | 40.56 | c | 52.19 | 59.80 | 64.13 | 63.52 | 56.64 | b | 50.54 | e | 32.82 | b | 25.64 | c | 44.02 | ||||||
1948 | 21.42 | 29.14 | 31.26 | 47.80 | 54.68 | 64.76 | e | 65.33 | d | 65.53 | a | 56.68 | b | 46.78 | d | 30.70 | 33.84 | 45.66 | ||||||||
1949 | 23.67 | a | 31.33 | a | 35.55 | 43.43 | b | 54.90 | j | 62.40 | e | 65.59 | b | 62.90 | 57.48 | a | 42.32 | 35.59 | a | 27.39 | 44.33 | a | ||||
1950 | 29.57 | a | 31.75 | 33.52 | 43.07 | a | 52.39 | 63.33 | c | 64.35 | 61.45 | 56.55 | a | 49.54 | c | 31.31 | a | 26.66 | b | 45.29 | ||||||
1951 | 21.10 | 27.56 | a | 34.84 | 41.87 | 52.60 | a | 63.55 | j | 67.74 | 66.06 | 56.69 | a | 48.25 | c | 32.10 | 29.19 | 43.45 | a | |||||||
1952 | 31.29 | 30.61 | a | 34.10 | 43.70 | 52.94 | 65.58 | f | 64.45 | 68.30 | d | 57.63 | 44.20 | a | 33.24 | a | 27.94 | 44.40 | a | |||||||
1953 | 33.23 | 29.82 | 41.19 | 45.79 | b | 53.54 | c | 65.81 | i | 67.87 | h | 65.65 | 56.90 | 50.45 | 37.10 | 26.13 | a | 43.98 | b | |||||||
1954 | 29.93 | a | 36.25 | 37.77 | 50.17 | a | 51.70 | a | 61.10 | a | 66.07 | a | 65.35 | 59.23 | 49.23 | 34.69 | a | 28.00 | a | 47.46 | ||||||
1955 | 28.26 | 24.46 | 38.90 | 52.17 | 57.45 | b | 63.80 | 69.39 | 66.97 | 61.63 | 49.35 | 34.77 | 29.28 | b | 48.04 | |||||||||||
1956 | 28.52 | 27.56 | b | 39.38 | b | 43.50 | 56.77 | a | 65.47 | m | 66.71 | 64.63 | a | 56.97 | a | 50.19 | 31.66 | a | 30.73 | a | 45.15 | a | ||||
1957 | 29.74 | 40.00 | 39.97 | b | 44.20 | 54.23 | 62.10 | 67.06 | o | 65.42 | 56.17 | 47.83 | a | 35.50 | 30.68 | 45.98 | a | |||||||||
1958 | 26.42 | 31.25 | 33.80 | a | 42.40 | 53.97 | a | 64.17 | a | 66.45 | 65.20 | p | 60.64 | b | 49.06 | 36.80 | 25.68 | 44.60 | a | |||||||
1959 | 23.97 | 30.79 | 33.35 | 43.07 | 54.42 | 61.73 | 63.84 | 65.45 | 59.30 | 45.52 | 30.53 | 29.61 | 45.13 | |||||||||||||
1960 | 26.84 | 26.14 | 34.19 | 45.87 | 54.42 | 64.87 | 64.94 | 65.06 | 57.67 | 49.23 | 37.21 | b | 26.13 | 46.05 | ||||||||||||
1961 | 22.61 | 30.18 | 33.96 | e | 40.77 | 53.03 | 61.00 | 61.71 | g | 62.19 | 56.57 | 46.24 | b | 32.80 | 28.00 | 42.49 | a | |||||||||
1962 | 21.45 | 33.11 | 33.19 | 44.93 | 56.03 | 61.07 | b | 65.35 | 62.88 | e | 59.67 | 48.65 | 37.64 | b | 30.19 | d | 46.18 | |||||||||
1963 | 17.94 | 29.18 | 35.55 | b | 49.30 | 53.24 | j | 62.37 | 67.26 | 65.84 | 59.00 | 49.71 | 34.67 | 25.52 | 45.12 | a | ||||||||||
1964 | 23.23 | 21.83 | 32.66 | b | 43.77 | 56.06 | 62.10 | 67.39 | 66.14 | c | 59.43 | 45.81 | j | 36.63 | 29.65 | 45.35 | a | |||||||||
1965 | 30.45 | 26.21 | 30.03 | 48.97 | 55.68 | 62.90 | 66.52 | 63.29 | 58.30 | 46.52 | j | 41.10 | 34.06 | 47.05 | a | |||||||||||
1966 | 25.60 | a | 25.79 | 38.10 | 47.20 | 54.35 | 62.33 | 68.65 | 64.61 | 58.73 | 44.83 | g | 37.50 | b | 25.16 | 46.18 | a | |||||||||
1967 | 24.90 | 28.14 | 41.45 | 51.77 | 51.45 | 63.63 | 65.59 | b | 62.68 | c | 56.30 | 46.17 | g | 37.07 | b | 26.39 | 46.31 | a | ||||||||
1968 | 30.39 | 31.21 | 37.23 | 44.53 | 53.23 | 60.87 | 64.06 | 63.58 | e | 53.31 | d | 47.55 | b | 36.11 | b | 26.10 | 45.68 | |||||||||
1969 | 31.10 | 32.07 | 29.61 | 46.47 | 54.23 | 60.60 | 68.10 | 66.19 | e | 59.67 | 49.17 | h | 37.11 | b | 31.39 | 46.96 | a | |||||||||
1970 | 26.23 | 31.54 | 34.84 | 44.30 | 51.84 | 60.00 | 64.10 | 62.45 | 58.27 | 40.96 | h | 33.17 | a | 29.58 | 45.12 | a | ||||||||||
1971 | 27.35 | 27.61 | 33.32 | 43.30 | 53.68 | 63.90 | 65.23 | 62.52 | 58.20 | 50.69 | e | 37.18 | b | 31.87 | 46.24 | |||||||||||
1972 | 27.06 | 30.28 | 40.42 | 46.77 | 54.84 | 62.00 | 64.84 | 62.77 | a | 59.37 | 50.42 | g | 31.40 | 25.35 | 45.92 | a | ||||||||||
1973 | 25.61 | 28.43 | 36.68 | 38.80 | 50.30 | d | 56.00 | ----- | z | 61.90 | 55.90 | 44.78 | h | 36.23 | 25.87 | 41.57 | b | |||||||||
1974 | 23.93 | b | 26.43 | 38.87 | 44.53 | 55.55 | 59.07 | 64.52 | 62.32 | 51.00 | 47.29 | 34.71 | f | 27.23 | 45.52 | a | ||||||||||
1975 | 27.32 | 29.93 | 33.23 | 40.50 | 47.55 | 57.73 | 61.16 | 58.71 | 48.63 | ----- | z | 29.27 | 24.06 | 41.64 | a | |||||||||||
1976 | 23.71 | 32.68 | a | 36.45 | 46.97 | 49.65 | 61.20 | 62.03 | 60.16 | 54.70 | 38.36 | f | 28.20 | 22.90 | 43.51 | a | ||||||||||
1977 | 21.29 | 29.54 | 32.03 | 43.47 | 55.65 | 61.17 | 63.68 | 64.06 | 57.11 | b | 47.32 | 34.60 | 30.40 | a | 45.03 | |||||||||||
1978 | 22.90 | ----- | z | ----- | z | 46.83 | 54.97 | 59.16 | k | 65.33 | a | 63.55 | 58.43 | 45.60 | p | 39.93 | 26.32 | 47.28 | d | |||||||
1979 | 23.65 | 27.61 | 36.33 | a | 43.87 | ----- | z | 57.50 | ----- | z | ----- | z | 56.00 | 43.35 | 27.53 | 25.83 | b | 37.96 | c | |||||||
1980 | 27.06 | 28.62 | 31.90 | 37.43 | 53.35 | 64.90 | 67.45 | 64.32 | 59.27 | 42.87 | 31.43 | 28.45 | 44.76 | |||||||||||||
1981 | 28.06 | 26.86 | 37.23 | 47.23 | 52.16 | 60.67 | 65.21 | b | 61.65 | 56.77 | 48.68 | 34.20 | 27.26 | 45.50 | ||||||||||||
1982 | 25.10 | a | 27.68 | 35.94 | 45.50 | 52.58 | 59.67 | 65.03 | a | 64.58 | 58.00 | 45.67 | g | ----- | z | 27.74 | 46.18 | b | ||||||||
1983 | 25.39 | 31.14 | 36.62 | b | 37.53 | 46.71 | 57.47 | 65.61 | 64.10 | 59.57 | 50.45 | 38.20 | 21.43 | a | 44.52 | |||||||||||
1984 | 24.32 | 27.24 | 33.13 | 40.17 | a | 53.42 | 61.25 | n | 62.96 | d | 63.35 | 54.17 | 46.35 | 36.63 | c | 33.19 | 43.18 | a | ||||||||
1985 | 24.00 | 27.64 | 41.26 | 44.50 | n | 53.39 | 59.46 | b | 63.76 | j | 63.94 | 57.59 | a | 46.31 | e | 35.00 | 21.90 | 43.05 | b | |||||||
1986 | 25.87 | 31.39 | 36.52 | 46.60 | 52.15 | e | 60.63 | 63.19 | 63.90 | b | 59.00 | 47.03 | 34.68 | b | 29.33 | d | 45.86 | |||||||||
1987 | 25.00 | a | 30.75 | 30.29 | 38.30 | 51.48 | 59.00 | 63.39 | 63.00 | 54.43 | 45.13 | 32.57 | 25.68 | 43.25 | ||||||||||||
1988 | 22.16 | 27.34 | 30.77 | 40.87 | 50.74 | 59.80 | 63.77 | a | 63.57 | c | 55.95 | k | 45.76 | b | 33.03 | 24.58 | 42.04 | a | ||||||||
1989 | 27.00 | 28.93 | 35.06 | 45.10 | 54.71 | 60.37 | 64.00 | 63.57 | a | 52.83 | 43.41 | d | 32.53 | 22.10 | j | 46.14 | a | |||||||||
1990 | 27.15 | e | 29.21 | 36.36 | c | 46.67 | 52.47 | a | 66.03 | 63.87 | 61.03 | 58.62 | f | 42.77 | 36.23 | 26.96 | h | 46.18 | b | |||||||
1991 | 26.08 | e | 28.50 | t | 36.71 | 42.27 | 55.16 | 62.53 | 63.29 | 62.38 | b | 55.30 | 43.43 | a | 31.37 | 29.58 | e | 46.19 | a | |||||||
1992 | 27.33 | a | 31.83 | 35.90 | k | 44.30 | 52.23 | 59.07 | c | 62.35 | 61.07 | b | 54.33 | f | 42.73 | i | 29.00 | a | ----- | z | 45.90 | d | ||||
1993 | ----- | z | 29.75 | 33.45 | 41.92 | d | 49.37 | d | 64.14 | p | 66.10 | 62.90 | 53.70 | 42.03 | 28.75 | n | 27.39 | 45.18 | c | |||||||
1994 | 24.42 | 26.54 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 64.38 | b | 56.67 | ----- | z | 37.67 | 32.55 | 40.37 | f | |||||
1995 | 29.70 | a | 35.32 | 36.29 | 41.57 | 54.70 | d | 59.90 | 65.03 | 65.90 | 55.88 | e | 46.71 | c | 36.67 | 30.17 | a | 46.49 | ||||||||
1996 | 25.87 | 32.96 | c | 32.38 | b | 44.03 | a | ----- | z | ----- | z | 67.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.56 | g | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.57 | 29.16 | 35.11 | 43.59 | 52.37 | 60.82 | 64.50 | 63.39 | 56.86 | 46.27 | 33.75 | 27.48 | 45.38 | |||||||||||||
S.D. | 3.51 | 3.38 | 3.47 | 3.16 | 2.47 | 2.77 | 2.12 | 2.05 | 2.52 | 3.26 | 3.11 | 3.00 | 1.18 | |||||||||||||
SKEW | -0.24 | 0.14 | 0.40 | 0.32 | -0.52 | -0.43 | -0.73 | -0.92 | -0.80 | -0.20 | -0.38 | 0.21 | 0.25 | |||||||||||||
MAX | 33.23 | 40.00 | 45.97 | 52.17 | 57.45 | 68.27 | 69.39 | 68.30 | 61.63 | 52.59 | 41.10 | 34.19 | 48.04 | |||||||||||||
MIN | 15.63 | 21.41 | 26.90 | 37.17 | 46.19 | 53.23 | 56.90 | 56.45 | 48.63 | 38.61 | 25.40 | 21.43 | 43.25 | |||||||||||||
YRS | 72 | 75 | 72 | 71 | 73 | 68 | 66 | 73 | 69 | 57 | 69 | 67 | 23 |