YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1905 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.72 | h | 43.15 | 38.90 | b | 41.02 | j | |
1906 | 39.64 | b | 44.54 | 45.00 | i | 54.60 | d | 53.94 | 57.87 | 69.98 | 65.05 | 59.97 | a | 53.06 | 43.22 | a | 39.89 | 52.89 | a | |||||||
1907 | 32.34 | b | 42.16 | 41.90 | 48.28 | 57.66 | b | 60.83 | a | 66.32 | a | 61.98 | 59.72 | 56.27 | 47.23 | s | 39.92 | 51.58 | a | |||||||
1908 | 39.57 | h | 38.56 | m | 42.28 | h | 49.80 | h | 52.17 | a | 60.29 | a | 68.92 | f | 64.89 | 58.78 | 51.79 | 47.02 | 36.40 | b | 53.05 | e | ||||
1909 | 32.98 | 41.19 | a | 44.19 | 47.25 | 52.89 | 60.21 | a | 61.53 | 61.42 | a | 58.55 | b | 51.21 | c | 40.83 | c | 30.15 | 48.53 | |||||||
1910 | 32.85 | 32.71 | 46.42 | ----- | z | 55.97 | 57.72 | 62.29 | 59.97 | 57.03 | 51.92 | 42.23 | 39.63 | 48.98 | a | |||||||||||
1911 | 36.05 | 36.77 | 46.03 | a | 46.60 | 51.82 | 56.61 | b | 65.27 | 61.76 | 55.18 | 50.10 | 41.54 | b | 38.16 | 48.82 | ||||||||||
1912 | 37.75 | a | 42.84 | a | 43.40 | 46.93 | 53.97 | m | 60.53 | 63.47 | 62.24 | 57.62 | 47.53 | 43.18 | 38.63 | 49.47 | a | |||||||||
1913 | 32.85 | 36.77 | 40.61 | 48.68 | 53.60 | 60.10 | a | 64.73 | a | 65.27 | 58.97 | 49.17 | a | 45.20 | 40.35 | a | 49.69 | |||||||||
1914 | 41.05 | a | 42.18 | 46.60 | g | 50.37 | 57.76 | 61.05 | b | 69.00 | g | 67.32 | a | 58.43 | a | 56.03 | a | 48.40 | a | 36.34 | c | 51.89 | b | |||
1915 | 39.50 | 44.20 | 48.83 | a | 53.32 | 54.15 | 60.20 | b | 61.22 | a | 61.83 | j | ----- | z | ----- | z | ----- | z | 39.47 | o | 51.63 | e | ||||
1916 | 28.55 | a | 43.45 | 45.71 | 51.25 | 51.34 | 59.77 | 63.80 | c | 66.73 | a | 61.15 | 47.94 | 43.70 | ----- | z | 51.22 | a | ||||||||
1917 | 36.35 | u | ----- | z | ----- | z | 45.88 | 52.40 | 56.23 | 63.10 | 65.90 | 60.52 | 55.43 | h | ----- | z | 43.65 | 55.38 | e | |||||||
1918 | 40.60 | 40.16 | 45.61 | 49.10 | a | 49.25 | a | 63.02 | 64.27 | 66.63 | d | 64.93 | o | 53.05 | a | 46.88 | a | 40.53 | a | 50.83 | a | |||||
1919 | 38.84 | 40.27 | 44.76 | 50.35 | 54.36 | b | 57.48 | 66.80 | a | 67.03 | 56.08 | 49.47 | p | 45.38 | f | 34.68 | c | 51.07 | b | |||||||
1920 | 38.41 | b | 39.21 | 43.71 | 43.92 | 49.71 | 57.35 | 65.35 | 66.48 | 55.89 | p | ----- | z | ----- | z | ----- | z | 50.52 | d | |||||||
1921 | ----- | z | ----- | z | ----- | z | 46.53 | a | 54.98 | a | 57.78 | a | 65.03 | a | 68.15 | a | 54.92 | 52.67 | b | 46.13 | d | 37.95 | a | 53.79 | c | |
1922 | 32.84 | b | 37.13 | b | 42.50 | 47.79 | a | 52.90 | 64.46 | b | 64.05 | 63.83 | g | ----- | z | ----- | z | ----- | z | 32.22 | d | 46.74 | d | |||
1923 | 39.68 | a | ----- | z | ----- | z | ----- | z | 55.16 | f | 59.55 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.62 | j | |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.64 | f | 59.28 | 49.94 | 42.32 | 42.76 | 48.57 | h | ||||
1926 | 39.27 | a | 43.33 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.30 | j |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.17 | f | 36.98 | a | 36.98 | k |
1928 | ----- | z | ----- | z | 46.72 | a | 47.55 | 58.05 | a | 59.25 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.89 | h | ||
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.15 | ----- | z | ----- | z | 51.15 | k | |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 62.94 | m | 60.70 | a | 63.23 | 59.15 | 49.68 | i | 44.98 | 34.94 | 52.60 | g | ||||
1933 | 34.33 | b | 33.20 | 42.52 | 47.78 | a | 50.50 | 57.62 | 62.45 | 64.56 | 56.32 | 52.61 | 44.95 | 42.06 | 49.07 | |||||||||||
1934 | 41.89 | 45.64 | 49.27 | 55.45 | 57.15 | 59.00 | 62.13 | 65.21 | 57.95 | 52.45 | 45.10 | a | 40.39 | 52.64 | ||||||||||||
1935 | 34.23 | 43.21 | 38.93 | c | 46.87 | 52.74 | 58.88 | 62.61 | 62.32 | 61.00 | 48.06 | 37.92 | 40.00 | 48.90 | ||||||||||||
1936 | 39.11 | 32.00 | 40.79 | 50.85 | 56.18 | 60.50 | 62.53 | 63.29 | 57.42 | 53.08 | 40.57 | 38.00 | 49.53 | |||||||||||||
1937 | 24.92 | 35.32 | 44.85 | 44.95 | 53.69 | 59.84 | a | 63.34 | 60.64 | b | 58.22 | 52.56 | 44.28 | 38.42 | 48.42 | |||||||||||
1938 | 36.31 | 39.09 | 41.15 | 49.38 | 54.00 | 60.02 | 65.44 | 58.72 | f | 61.30 | c | 50.72 | d | 40.58 | 37.81 | 48.71 | a | |||||||||
1939 | 38.87 | 35.48 | 42.76 | 50.03 | a | 54.58 | 56.22 | 63.16 | 64.11 | 58.32 | 51.89 | 45.60 | 42.34 | 50.28 | ||||||||||||
1940 | 41.26 | 42.62 | 47.21 | 51.17 | a | 58.37 | 62.27 | 65.54 | f | 63.96 | c | 61.14 | i | 53.52 | d | 40.09 | h | 40.37 | e | 51.19 | c | |||||
1941 | 41.24 | 45.41 | 50.13 | 51.55 | 54.94 | 58.93 | 68.45 | 62.42 | m | 56.18 | 51.48 | g | 45.83 | 39.40 | 51.21 | b | ||||||||||
1942 | 39.15 | 39.68 | 43.61 | 50.48 | 53.90 | 58.32 | 65.82 | 66.09 | c | 59.98 | 52.78 | b | 41.12 | 37.53 | 50.70 | |||||||||||
1943 | 31.89 | 40.54 | 41.39 | 50.25 | 51.34 | 56.68 | 62.81 | 60.58 | a | 60.63 | 48.70 | d | 45.23 | 37.32 | 48.95 | |||||||||||
1944 | 37.58 | 39.34 | 42.42 | 48.60 | 54.66 | 59.47 | 64.90 | 61.64 | f | 59.80 | 54.57 | b | 41.97 | 38.90 | 49.29 | a | ||||||||||
1945 | 39.27 | 40.11 | 40.31 | 44.25 | 54.77 | 56.42 | 64.05 | 63.50 | 56.45 | 51.23 | 40.32 | 37.74 | 49.03 | |||||||||||||
1946 | 37.40 | b | 38.77 | 42.37 | a | 47.67 | 56.06 | 56.58 | 63.45 | 62.90 | 58.05 | 45.33 | b | 39.87 | 37.60 | 48.84 | ||||||||||
1947 | 31.85 | 41.62 | 45.97 | 49.78 | 57.44 | 57.63 | 62.40 | 61.24 | 59.17 | 50.87 | 42.10 | 39.44 | 49.96 | |||||||||||||
1948 | 37.37 | 35.83 | 41.87 | a | 44.52 | 52.35 | 63.83 | i | 68.74 | ----- | z | ----- | z | 46.54 | q | 38.68 | 32.76 | 44.02 | d | |||||||
1949 | 25.55 | 33.70 | 43.06 | 49.12 | 55.10 | 57.83 | d | 62.25 | i | 61.13 | 58.78 | 45.23 | 46.82 | 35.56 | 46.53 | a | ||||||||||
1950 | 24.15 | 37.43 | a | 42.35 | 46.92 | 51.81 | 60.20 | b | 62.91 | h | 65.17 | b | 58.62 | 47.79 | 42.65 | 43.40 | 47.32 | a | ||||||||
1951 | 35.02 | 39.25 | 39.08 | 50.22 | 54.26 | 61.28 | 64.65 | a | 62.32 | 60.88 | 50.00 | 41.28 | a | 34.85 | 49.42 | |||||||||||
1952 | 33.26 | 39.10 | 41.52 | 50.17 | 53.74 | 56.58 | 64.60 | 63.70 | d | 59.83 | 55.45 | 40.10 | 37.10 | 49.60 | ||||||||||||
1953 | 41.23 | 40.57 | 42.39 | 45.70 | 52.40 | 55.33 | 63.45 | 61.41 | h | 59.17 | 51.02 | 45.12 | e | 41.00 | 48.85 | a | ||||||||||
1954 | 35.37 | 41.84 | 41.73 | 46.45 | 53.98 | 55.95 | 60.50 | d | 60.03 | 58.23 | 51.00 | 47.47 | 40.31 | 49.40 | ||||||||||||
1955 | 38.08 | 37.82 | 37.58 | 42.97 | 50.67 | b | 58.47 | 59.09 | h | 61.63 | 57.27 | 48.90 | 36.83 | 36.58 | 46.07 | a | ||||||||||
1956 | 36.45 | 34.10 | 40.00 | 49.98 | 57.74 | 55.98 | 64.18 | i | 61.98 | e | 57.20 | 47.47 | 42.52 | 38.97 | 47.49 | a | ||||||||||
1957 | 30.11 | 37.77 | 43.66 | 49.60 | 56.82 | 60.04 | c | 61.46 | e | 60.34 | 61.68 | 48.95 | i | 41.90 | f | 40.50 | 50.20 | b | ||||||||
1958 | 41.63 | 46.91 | 43.31 | 47.70 | 60.39 | 63.15 | 69.80 | h | 65.50 | 57.90 | 53.44 | 42.53 | 43.05 | 51.41 | a | |||||||||||
1959 | 39.11 | 39.70 | 43.23 | 48.82 | 52.79 | 59.61 | g | 64.87 | 61.65 | 56.35 | 50.33 | a | 42.73 | 39.05 | 48.97 | a | ||||||||||
1960 | 35.87 | 39.78 | 42.56 | 47.91 | a | 51.69 | 57.79 | k | 65.31 | 61.69 | 58.53 | 51.79 | 41.33 | 39.63 | 48.74 | a | ||||||||||
1961 | 44.02 | 42.36 | 44.61 | 47.30 | 53.82 | 63.58 | 65.97 | 67.76 | b | 56.10 | 49.11 | 40.28 | 36.89 | 50.98 | ||||||||||||
1962 | 35.97 | 40.75 | 40.76 | 49.76 | a | 49.79 | 56.33 | g | 62.43 | d | 61.85 | 58.97 | 50.97 | 43.95 | 40.42 | 48.69 | a | |||||||||
1963 | 32.50 | 46.70 | 42.91 | b | 46.67 | g | 54.66 | 56.62 | 60.15 | 62.95 | c | 62.18 | 51.89 | 42.88 | 38.65 | 50.19 | a | |||||||||
1964 | 37.65 | 40.07 | 42.63 | 45.35 | 52.34 | f | 58.02 | f | 62.50 | 60.61 | 55.80 | 52.68 | 39.60 | 35.13 | 47.20 | b | ||||||||||
1965 | 38.32 | a | 40.73 | 44.73 | 49.58 | 50.37 | d | 58.45 | b | 64.79 | b | 64.47 | 55.72 | 53.37 | 45.48 | ----- | z | 51.46 | a | |||||||
1966 | ----- | z | ----- | z | 42.34 | 48.55 | b | ----- | z | 57.78 | 60.50 | 60.05 | 59.70 | 50.00 | 44.43 | h | 41.34 | 52.53 | d | |||||||
1967 | 40.80 | c | 40.33 | g | 38.79 | s | ----- | z | 51.26 | b | ----- | z | 62.53 | n | 65.34 | ----- | z | ----- | z | 45.55 | 36.58 | 47.91 | g | |||
1968 | 37.03 | a | 46.43 | 45.71 | c | 45.52 | 53.22 | a | 58.02 | b | 64.88 | b | 60.95 | a | 57.28 | 49.16 | 43.68 | 34.95 | a | 49.74 | ||||||
1969 | 30.53 | 37.73 | 44.16 | 47.40 | 56.73 | a | 63.30 | 61.87 | 60.87 | 58.40 | a | 48.61 | 45.68 | 40.92 | 49.68 | |||||||||||
1970 | 37.26 | 45.11 | 43.60 | 43.43 | 53.08 | 61.35 | 63.50 | a | 62.97 | 55.63 | 49.18 | 45.32 | 36.13 | 49.71 | ||||||||||||
1971 | 35.39 | 40.09 | 38.85 | 46.41 | a | 53.63 | 54.38 | 64.05 | 66.77 | 56.12 | a | 48.08 | 42.21 | a | 35.50 | 48.46 | ||||||||||
1972 | 33.78 | a | 39.41 | 44.24 | 44.05 | 55.74 | 58.43 | 63.94 | 64.79 | 54.45 | 48.71 | 43.72 | 33.97 | 48.77 | ||||||||||||
1973 | 36.42 | 42.20 | 43.19 | 47.88 | a | 55.56 | 58.42 | 63.91 | c | 60.11 | 59.73 | 49.69 | 39.13 | 41.55 | 49.82 | |||||||||||
1974 | 34.63 | 39.70 | 42.45 | 46.68 | 50.05 | 59.47 | 62.05 | 63.92 | 63.22 | 51.90 | 45.05 | a | 40.19 | 49.94 | ||||||||||||
1975 | 36.77 | 38.80 | 41.03 | 43.17 | 52.90 | 57.33 | 63.79 | 60.35 | 60.72 | 49.65 | 41.32 | 40.58 | 48.87 | |||||||||||||
1976 | 39.18 | 39.29 | 40.48 | 46.92 | 53.92 | 55.50 | 62.29 | 60.84 | 60.77 | 51.06 | 46.17 | 40.26 | 49.72 | |||||||||||||
1977 | 35.82 | 44.86 | 41.08 | 50.18 | 50.52 | 60.05 | 61.74 | 67.00 | 56.52 | 50.84 | 40.93 | 40.39 | 49.99 | |||||||||||||
1978 | 41.63 | 43.50 | 46.73 | 48.02 | 52.02 | 61.83 | 63.73 | 63.31 | 57.30 | 53.27 | 39.05 | 34.63 | 50.42 | |||||||||||||
1979 | 33.77 | 37.75 | 46.48 | 48.30 | 55.27 | 59.77 | 64.16 | 63.34 | 62.03 | 53.15 | 44.30 | 43.35 | 50.97 | |||||||||||||
1980 | 33.65 | 42.04 | a | 42.53 | 51.18 | 53.31 | 56.15 | 63.55 | 61.18 | 58.53 | 52.84 | 44.95 | a | 40.97 | 50.07 | |||||||||||
1981 | 46.69 | 42.20 | 47.53 | 47.82 | 53.19 | 56.77 | 62.52 | 67.05 | 60.15 | 49.55 | 45.97 | 40.52 | 51.66 | |||||||||||||
1982 | 35.31 | 39.79 | 43.26 | 45.75 | 53.73 | 62.18 | 62.94 | 63.74 | 59.52 | a | 51.69 | 41.67 | 39.79 | 49.95 | ||||||||||||
1983 | 43.18 | 44.84 | 47.87 | 49.22 | a | 57.08 | 57.78 | 61.32 | a | 64.03 | 56.73 | 49.71 | 44.30 | 33.05 | 50.76 | |||||||||||
1984 | 40.65 | 43.14 | 46.84 | 46.45 | 51.34 | 56.53 | 63.92 | 63.44 | 58.47 | 48.24 | 42.50 | 35.95 | 49.79 | |||||||||||||
1985 | ----- | z | 36.41 | 41.95 | 49.30 | 54.34 | 59.12 | 67.83 | a | 63.82 | 56.50 | 48.82 | 34.65 | 36.94 | 49.97 | a | ||||||||||
1986 | 43.93 | a | 41.41 | 48.66 | 47.92 | 54.66 | b | 62.22 | 60.63 | 67.81 | 57.12 | 53.68 | 44.10 | 40.94 | 51.92 | |||||||||||
1987 | 38.71 | 44.80 | 45.58 | a | 51.83 | a | 56.31 | 61.23 | 63.17 | a | 64.55 | 61.22 | 55.94 | 47.80 | 37.47 | a | 52.38 | |||||||||
1988 | 38.42 | 42.22 | 43.76 | 49.10 | 54.11 | 57.90 | 63.60 | 63.58 | 58.88 | 55.13 | 43.25 | 39.84 | 50.82 | |||||||||||||
1989 | 37.66 | 34.86 | ----- | z | 50.76 | a | 53.48 | 60.85 | 60.55 | 62.05 | 60.25 | 51.03 | 45.40 | a | 40.88 | a | 50.71 | a | ||||||||
1990 | 39.43 | b | 37.59 | a | 46.03 | 50.95 | a | 53.11 | d | 58.68 | 65.55 | c | 65.23 | g | 62.07 | 49.08 | 42.07 | p | 32.16 | 49.47 | b | |||||
1991 | 35.58 | 45.72 | c | 42.34 | 46.52 | 51.83 | a | 56.90 | 64.77 | 64.82 | 60.05 | 49.71 | 44.47 | a | 40.92 | a | 50.30 | |||||||||
1992 | 41.17 | a | 46.59 | 48.12 | e | 51.55 | 57.29 | 62.47 | 64.73 | 64.75 | a | 56.72 | a | 51.62 | a | 42.73 | 36.19 | 51.99 | ||||||||
1993 | 34.79 | 39.18 | 46.00 | g | 48.04 | d | 58.31 | b | 58.63 | 60.04 | c | 63.10 | a | 57.62 | f | 50.90 | j | 38.12 | b | 37.91 | c | 48.68 | c | |||
1994 | 41.44 | ----- | z | ----- | z | 50.19 | a | ----- | z | 57.43 | 64.44 | 63.19 | 61.41 | b | 48.50 | a | 38.29 | a | 37.17 | a | 51.34 | c | ||||
1995 | 41.25 | m | ----- | z | ----- | z | 47.38 | a | 55.46 | c | 58.92 | 65.16 | 60.20 | a | 61.38 | 50.18 | a | 45.30 | h | 42.56 | g | 56.96 | e | |||
1996 | 37.41 | d | 42.60 | 46.65 | 50.68 | 51.76 | b | 58.65 | 66.18 | 63.92 | 55.64 | a | 48.86 | b | 40.59 | b | 36.73 | 49.97 | ||||||||
1997 | 37.97 | 39.96 | 42.08 | 45.88 | 57.08 | 57.70 | 61.98 | a | 65.08 | 59.78 | 47.29 | 44.50 | 37.08 | 49.70 | ||||||||||||
1998 | 37.79 | 42.80 | 44.31 | 48.27 | 52.77 | 60.23 | 67.23 | 64.68 | 62.13 | k | 49.15 | 43.05 | 35.18 | 49.59 | a | |||||||||||
1999 | 37.52 | 38.48 | 41.45 | 46.63 | 50.21 | 57.07 | 61.89 | 63.27 | a | 56.40 | a | 49.10 | g | 45.46 | f | 39.11 | 49.20 | b | ||||||||
2000 | 36.06 | d | 41.96 | d | 41.48 | e | 49.45 | b | 53.17 | e | 59.98 | c | 62.36 | b | 60.34 | b | 56.09 | c | 48.47 | b | 38.52 | h | 39.68 | a | 49.91 | a |
2001 | 38.77 | g | 38.27 | b | 42.84 | b | 45.37 | c | 53.98 | h | 55.95 | k | 61.13 | a | 62.96 | d | 57.04 | c | 46.37 | e | 42.85 | d | 37.07 | d | 48.21 | c |
2002 | 36.35 | d | 38.89 | e | 38.91 | c | 45.40 | e | 50.80 | f | 59.28 | e | 63.82 | i | 64.25 | u | 54.02 | i | 48.31 | g | 42.85 | m | 39.54 | e | 43.06 | f |
2003 | 42.50 | d | 39.60 | c | 43.62 | k | 47.29 | b | 52.24 | j | 59.33 | f | 64.21 | j | 62.97 | p | ----- | z | 53.40 | u | ----- | z | 37.56 | f | 43.13 | i |
2004 | 38.05 | b | 42.22 | 45.71 | 54.64 | i | 55.43 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.35 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.92 | 40.41 | 43.55 | 48.22 | 53.95 | 58.96 | 63.68 | 63.46 | 58.55 | 50.78 | 42.97 | 38.36 | 49.96 | |||||||||||||
S.D. | 4.12 | 3.39 | 2.65 | 2.46 | 2.36 | 2.15 | 2.04 | 2.21 | 2.01 | 2.41 | 2.73 | 2.77 | 1.05 | |||||||||||||
SKEW | -0.72 | -0.23 | 0.29 | 0.21 | 0.25 | 0.37 | 0.58 | 0.22 | 0.09 | 0.14 | -0.47 | -0.48 | 0.82 | |||||||||||||
MAX | 46.69 | 46.91 | 50.13 | 55.45 | 60.39 | 64.46 | 69.98 | 68.15 | 63.22 | 56.27 | 48.40 | 43.65 | 52.64 | |||||||||||||
MIN | 24.15 | 32.00 | 37.58 | 42.97 | 49.25 | 54.38 | 60.04 | 59.97 | 54.45 | 45.23 | 34.65 | 30.15 | 48.42 | |||||||||||||
YRS | 84 | 83 | 79 | 85 | 83 | 82 | 78 | 79 | 79 | 77 | 76 | 86 | 42 |