YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1914 | 44.24 | 42.77 | 48.26 | b | 52.77 | 57.50 | 60.47 | 63.70 | f | 61.44 | 55.86 | a | 52.87 | 45.33 | a | 35.13 | 50.60 | a | ||||||||
1915 | 37.47 | 42.59 | 48.69 | 51.42 | 55.21 | 59.40 | 64.79 | 65.19 | 57.53 | a | 52.45 | 42.25 | 40.65 | 51.47 | ||||||||||||
1916 | 29.71 | 41.32 | a | 44.03 | a | 49.40 | 51.74 | 58.47 | 61.52 | 62.89 | 57.37 | 47.29 | 41.17 | 37.50 | a | 48.53 | ||||||||||
1917 | 37.00 | a | 38.64 | 39.39 | 46.08 | 52.60 | 57.26 | a | 62.34 | 63.06 | 57.75 | 51.97 | a | 47.79 | a | 44.18 | 49.84 | |||||||||
1918 | 43.35 | 39.31 | a | 43.48 | a | 48.10 | 52.06 | 60.35 | 62.42 | a | 61.58 | f | 59.70 | g | 52.84 | b | 44.15 | 38.97 | 48.50 | b | ||||||
1919 | 39.26 | 40.32 | 44.08 | a | 49.48 | a | 53.53 | 56.50 | a | 61.20 | a | 61.46 | e | 58.18 | b | 48.40 | a | 43.69 | c | 35.15 | 49.27 | |||||
1920 | 38.39 | 38.59 | 44.06 | 45.53 | 50.74 | 58.00 | 63.58 | a | 63.04 | c | 57.16 | a | 49.24 | b | 44.35 | 41.61 | 49.52 | |||||||||
1921 | 39.67 | b | 42.30 | a | 44.63 | 47.11 | b | 52.70 | a | 59.57 | c | 59.90 | 61.03 | 54.80 | 51.85 | a | 45.37 | 37.43 | a | 49.70 | ||||||
1922 | 34.05 | 37.93 | 41.32 | a | 46.21 | a | 53.50 | 60.66 | a | 62.02 | a | 62.66 | 59.00 | 51.76 | 40.87 | 37.41 | c | 48.95 | ||||||||
1923 | 39.47 | a | 36.21 | 43.63 | a | 50.40 | a | 54.12 | c | 60.11 | c | 65.04 | g | 64.85 | a | 58.85 | f | 51.68 | c | 44.93 | b | 41.22 | a | 48.66 | b | |
1924 | 39.32 | a | 45.54 | b | 43.52 | a | 48.66 | e | 56.62 | e | 60.26 | e | 63.83 | d | 62.08 | g | 56.85 | d | 51.31 | b | 43.26 | a | 35.30 | d | 49.50 | a |
1925 | 41.91 | c | 43.98 | b | 43.38 | e | 49.03 | k | 55.74 | f | 59.05 | b | 64.06 | 61.67 | k | 58.13 | c | 49.55 | 43.53 | a | 44.67 | e | 49.81 | c | ||
1926 | 40.37 | a | 45.96 | d | 49.38 | b | 55.09 | a | 56.74 | 61.78 | a | 64.73 | 63.27 | r | 61.92 | ----- | z | 46.69 | l | 40.50 | e | 52.94 | c | |||
1927 | 39.33 | b | 42.30 | a | 44.30 | a | 48.56 | e | 53.89 | d | 62.47 | 64.95 | a | 65.18 | 58.97 | a | 52.66 | 45.54 | b | 36.52 | a | 51.22 | ||||
1928 | 40.55 | 41.11 | b | 47.84 | 49.37 | 57.26 | 60.82 | 66.08 | 63.63 | 57.52 | a | 51.85 | a | 45.66 | a | 38.43 | a | 51.68 | ||||||||
1929 | 33.53 | 33.19 | a | 45.71 | 46.58 | 54.39 | 59.57 | a | 63.30 | a | 63.05 | 57.61 | b | 53.29 | 42.20 | b | 42.40 | b | 49.57 | |||||||
1930 | 28.84 | 43.21 | 46.37 | a | 51.73 | 53.74 | 58.76 | a | 62.87 | 64.82 | 58.85 | 48.89 | 42.93 | a | 39.53 | a | 50.05 | |||||||||
1931 | 43.06 | 42.59 | 46.33 | a | 51.27 | 57.73 | 59.08 | 64.12 | a | 62.69 | 58.88 | 50.57 | a | 41.07 | 39.19 | b | 51.38 | |||||||||
1932 | 37.17 | a | 40.00 | 46.24 | 50.28 | 53.82 | a | 60.77 | 60.82 | a | 63.26 | 57.83 | 52.19 | b | 47.72 | 36.32 | 50.53 | |||||||||
1933 | 39.15 | 36.86 | 44.77 | 48.90 | 51.77 | 58.85 | 61.80 | a | 64.03 | 56.25 | 51.87 | 44.82 | 43.79 | 50.24 | ||||||||||||
1934 | 43.74 | 44.88 | 49.58 | 54.22 | 57.11 | 60.12 | 62.68 | 64.52 | 58.12 | 53.39 | 48.13 | 41.97 | 53.20 | |||||||||||||
1935 | 39.58 | 42.18 | 42.00 | 47.65 | 53.81 | 59.50 | a | 62.76 | 63.40 | b | 59.75 | 49.23 | 40.47 | 40.94 | 50.10 | |||||||||||
1936 | 42.10 | 33.84 | 43.02 | 52.52 | 56.83 | a | 61.75 | 62.83 | b | 63.41 | h | 57.28 | 53.16 | 42.19 | a | 42.77 | 49.84 | a | ||||||||
1937 | 28.58 | 39.86 | 47.10 | 47.93 | 54.53 | 60.97 | 63.00 | 61.60 | 59.02 | a | 54.19 | 46.27 | 42.44 | 50.46 | ||||||||||||
1938 | 39.92 | 41.50 | 44.45 | 51.32 | 55.18 | 60.95 | 64.66 | 60.63 | 60.85 | 52.27 | 42.20 | 41.21 | 51.26 | |||||||||||||
1939 | 42.84 | 38.61 | 42.07 | b | 45.68 | e | 54.10 | 57.57 | 62.74 | 64.32 | a | 57.55 | 52.23 | 46.72 | 44.92 | a | 50.78 | |||||||||
1940 | 42.23 | 44.31 | 47.89 | 50.92 | 56.52 | 60.27 | 63.71 | 63.27 | 61.82 | 54.47 | 41.57 | 40.76 | 52.31 | |||||||||||||
1941 | 40.89 | 43.91 | 48.45 | a | 52.60 | 54.77 | 59.37 | 66.37 | 63.61 | 56.71 | a | 51.74 | 46.03 | 41.82 | 52.19 | |||||||||||
1942 | 37.00 | 40.50 | 44.08 | 49.97 | 54.24 | 58.17 | 64.90 | 64.89 | 58.12 | 52.16 | 42.65 | 42.08 | 50.73 | |||||||||||||
1943 | 33.47 | 41.89 | 42.52 | 50.60 | 52.94 | 58.78 | 63.27 | a | 62.90 | 60.88 | 53.03 | 43.83 | f | 37.77 | 50.73 | a | ||||||||||
1944 | 39.61 | 41.43 | 43.31 | 49.47 | 53.74 | 59.17 | 64.34 | 63.50 | 61.35 | 54.60 | 44.05 | 36.71 | 50.94 | |||||||||||||
1945 | 41.27 | 42.66 | 43.77 | 47.28 | 56.66 | b | 57.91 | a | 64.35 | a | 63.06 | 56.33 | c | 51.98 | a | 44.45 | 39.55 | 50.77 | ||||||||
1946 | 39.93 | a | 42.52 | 44.10 | a | 48.63 | 56.72 | b | 58.16 | a | 63.55 | a | 63.02 | 58.40 | 47.48 | 40.62 | a | 39.59 | b | 50.23 | ||||||
1947 | ----- | z | 43.52 | 46.00 | 52.19 | a | 59.42 | a | 58.86 | a | ----- | z | 60.61 | 58.00 | 52.32 | f | 43.71 | a | 42.32 | c | 51.63 | c | ||||
1948 | 41.48 | c | 43.74 | 43.27 | e | 49.12 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.22 | m | 44.40 | h | ||
1949 | 30.27 | 37.95 | ----- | z | 50.25 | b | 57.08 | 58.83 | 61.10 | 62.87 | 59.63 | 47.32 | 48.60 | 39.63 | 50.32 | a | ||||||||||
1950 | 26.45 | 41.36 | 44.10 | 47.80 | 53.32 | 60.92 | 64.08 | 64.64 | b | 59.63 | g | 49.95 | a | 43.90 | 45.13 | 49.24 | a | |||||||||
1951 | 38.48 | 41.82 | 41.74 | 51.02 | 55.63 | 62.40 | 64.60 | 62.40 | 58.52 | 53.10 | e | 44.28 | 37.95 | 51.00 | ||||||||||||
1952 | 36.71 | 41.36 | 44.03 | 50.37 | 55.44 | 58.57 | 65.53 | 65.03 | 59.46 | e | 54.45 | a | 40.22 | 39.95 | b | 50.93 | ||||||||||
1953 | 46.03 | 42.76 | a | 45.13 | 49.18 | 54.58 | a | 58.43 | 64.39 | 62.97 | a | 60.21 | a | 53.45 | 46.28 | 42.32 | 52.14 | |||||||||
1954 | 37.13 | 42.91 | 41.85 | 47.73 | 55.45 | a | 57.28 | 61.69 | 62.11 | 59.25 | 50.37 | 48.47 | 40.10 | a | 50.36 | |||||||||||
1955 | 40.61 | 39.04 | a | 40.26 | 45.07 | 52.90 | 58.72 | 60.66 | 61.11 | 57.00 | a | 51.08 | 39.22 | 38.84 | 48.71 | |||||||||||
1956 | 39.02 | 36.71 | 42.65 | 50.38 | 58.52 | 59.07 | a | 65.34 | b | 63.61 | 58.12 | 50.52 | 41.40 | 41.80 | c | 50.59 | ||||||||||
1957 | 32.55 | 40.54 | 45.26 | 50.58 | 58.24 | 61.29 | a | 61.92 | a | 61.46 | c | 61.97 | 51.16 | 42.62 | a | 43.33 | a | 50.91 | ||||||||
1958 | 42.73 | 47.12 | b | 44.00 | a | 50.20 | 60.65 | 65.38 | 69.40 | a | 65.77 | 59.48 | 52.58 | 43.22 | a | 45.02 | 53.80 | |||||||||
1959 | 40.16 | 41.50 | 45.28 | a | 50.80 | 54.12 | a | 61.18 | 65.15 | 62.42 | 57.92 | 52.11 | 43.82 | 39.81 | 51.19 | |||||||||||
1960 | 38.44 | 41.69 | 44.05 | a | 50.03 | a | 53.66 | 60.15 | 65.52 | 63.34 | 57.55 | 53.08 | 43.27 | 38.79 | 50.80 | |||||||||||
1961 | 43.20 | a | 46.02 | 46.48 | a | 48.87 | 55.42 | 63.15 | 66.52 | 67.35 | 56.60 | 50.32 | 40.27 | 40.22 | a | 52.03 | ||||||||||
1962 | 37.78 | a | 43.30 | 43.11 | 51.29 | a | 52.89 | 59.69 | a | 63.84 | 63.26 | 59.80 | 52.77 | 46.29 | a | 42.25 | a | 51.36 | ||||||||
1963 | 34.35 | 47.02 | 44.37 | 49.03 | 56.24 | 59.30 | 62.63 | a | 63.48 | 63.53 | 54.08 | 45.58 | 41.39 | 51.75 | ||||||||||||
1964 | 41.58 | 41.48 | a | 45.05 | 47.75 | 53.29 | 59.53 | 63.42 | 62.31 | 58.30 | 51.79 | 42.03 | 36.92 | 50.29 | ||||||||||||
1965 | 40.37 | 43.02 | 44.45 | 51.15 | 53.65 | 60.97 | 66.19 | 65.45 | 57.62 | 54.90 | 47.47 | 39.48 | 52.06 | |||||||||||||
1966 | 40.74 | 42.68 | 45.10 | 50.37 | 55.24 | 59.92 | 63.44 | 64.76 | 60.75 | 51.65 | 45.82 | 44.84 | 52.11 | |||||||||||||
1967 | 43.08 | 43.32 | 42.69 | 46.67 | 55.81 | 64.20 | 64.90 | 67.44 | 62.92 | 53.71 | 45.12 | 40.10 | 52.50 | |||||||||||||
1968 | 39.37 | 44.74 | 47.00 | 48.62 | 55.48 | 59.55 | a | 65.02 | 62.79 | 59.77 | 50.90 | 45.38 | 36.11 | 51.23 | ||||||||||||
1969 | 32.91 | b | 40.12 | 45.40 | 49.81 | a | 57.58 | 64.60 | a | 63.42 | 61.61 | 59.18 | 49.94 | 44.03 | a | 41.37 | 50.83 | |||||||||
1970 | 39.47 | 44.27 | 44.85 | 46.88 | 54.27 | 61.63 | 62.38 | b | 61.84 | 54.68 | 46.79 | 41.34 | a | 35.26 | 49.47 | |||||||||||
1971 | 37.10 | 39.26 | a | 40.58 | a | 47.57 | 55.94 | 56.85 | 65.03 | 66.71 | 56.97 | a | 49.55 | 44.17 | 36.76 | 49.71 | ||||||||||
1972 | 35.73 | 39.98 | 46.19 | 45.93 | 57.31 | 60.12 | 64.60 | 64.60 | 56.47 | 48.65 | 44.28 | 37.00 | 50.07 | |||||||||||||
1973 | 38.58 | 42.39 | 45.65 | 48.88 | 56.24 | 60.57 | 64.39 | 61.15 | 60.17 | 51.69 | 41.98 | 42.89 | 51.21 | |||||||||||||
1974 | 38.10 | 42.54 | 44.81 | 49.02 | 52.87 | 60.32 | 62.95 | 64.77 | 62.23 | 51.79 | 46.65 | 42.45 | 51.54 | |||||||||||||
1975 | 40.22 | a | 40.83 | a | 42.77 | 46.13 | 54.47 | 59.62 | 65.53 | 62.42 | 59.83 | 51.35 | 44.12 | a | 41.32 | 50.72 | ||||||||||
1976 | 41.69 | 41.33 | 42.27 | 48.31 | i | 55.63 | 57.92 | 64.42 | 62.55 | 61.28 | 51.94 | 44.98 | 41.62 | b | 51.42 | a | ||||||||||
1977 | 36.18 | 45.66 | 44.03 | 51.20 | 53.29 | 61.47 | 62.74 | 68.15 | 57.50 | 51.08 | 42.65 | 41.02 | 51.25 | |||||||||||||
1978 | 42.38 | a | 45.39 | 47.69 | 49.87 | 54.52 | 63.10 | 65.35 | 64.26 | 58.15 | 52.90 | 39.65 | 35.48 | 51.56 | ||||||||||||
1979 | 33.32 | 41.21 | 47.82 | 49.73 | 56.58 | 60.23 | 65.87 | 64.45 | 61.33 | 53.89 | 41.58 | 43.74 | b | 51.65 | ||||||||||||
1980 | 33.71 | 42.84 | 45.35 | 52.57 | 55.52 | 58.65 | 64.27 | 61.82 | 60.28 | 52.24 | 46.17 | 43.83 | a | 51.44 | ||||||||||||
1981 | 41.95 | 43.25 | 48.35 | a | 49.43 | 54.63 | 58.20 | 63.19 | 67.19 | 60.66 | a | 49.98 | 45.87 | 40.76 | 51.96 | |||||||||||
1982 | 39.87 | 41.93 | 43.98 | d | 48.34 | e | 54.98 | a | 63.38 | 63.20 | a | 64.43 | a | 60.47 | a | 52.31 | b | 42.65 | c | 39.22 | d | 51.23 | ||||
1983 | 43.50 | d | 46.75 | b | 48.03 | 49.62 | 58.61 | 59.62 | 63.15 | a | 65.52 | a | 57.16 | a | 49.93 | b | 46.45 | a | 34.45 | 51.90 | ||||||
1984 | 42.75 | a | 42.96 | a | 48.50 | 47.14 | a | 52.73 | 59.16 | a | 65.16 | 64.79 | 59.57 | 49.85 | 43.93 | 35.98 | b | 51.04 | ||||||||
1985 | 35.83 | a | 38.80 | 42.35 | 48.84 | a | 53.87 | a | 61.00 | 68.32 | 64.52 | c | 56.70 | b | 51.66 | 35.78 | a | 34.87 | 49.38 | |||||||
1986 | 44.47 | 42.46 | a | 49.77 | 49.02 | 56.76 | b | 63.37 | 62.19 | 67.88 | a | 58.74 | a | 53.16 | 45.60 | a | 39.58 | 52.75 | ||||||||
1987 | 40.15 | 44.80 | 47.68 | 52.92 | 57.44 | 62.60 | 64.43 | c | 65.27 | a | 61.82 | 53.82 | a | 47.85 | 38.13 | 53.07 | ||||||||||
1988 | 38.48 | b | 43.46 | a | 45.76 | 50.89 | b | 55.62 | a | 59.86 | a | 64.79 | 64.42 | 60.17 | 55.26 | 45.55 | 40.56 | 52.07 | ||||||||
1989 | 41.35 | 35.66 | 43.70 | a | 53.29 | b | 55.67 | a | 62.95 | 63.85 | 64.48 | a | 61.45 | 51.94 | 46.55 | 42.13 | 51.92 | |||||||||
1990 | 42.84 | 40.50 | 46.42 | 52.78 | a | 55.02 | a | 60.70 | 67.75 | a | 66.80 | c | 62.95 | 51.22 | a | 46.24 | a | 34.54 | c | 52.31 | ||||||
1991 | 39.05 | 47.16 | 44.23 | 49.55 | 54.32 | 58.84 | b | 66.39 | c | 67.14 | b | 61.10 | a | 52.11 | c | 46.62 | 42.32 | a | 52.40 | |||||||
1992 | 43.32 | c | 46.92 | d | 48.61 | d | 53.17 | 59.00 | d | ----- | z | 65.92 | a | 66.39 | 60.76 | e | 54.02 | b | 45.22 | a | 38.70 | c | 52.91 | a | ||
1993 | 35.22 | d | 40.04 | 47.00 | c | 50.17 | 59.58 | 60.43 | a | 61.34 | c | 64.91 | c | 60.54 | b | 54.23 | 41.14 | a | 40.76 | d | 51.28 | |||||
1994 | 44.55 | a | 40.25 | 48.69 | b | 52.32 | 57.15 | 59.65 | c | 68.14 | f | 66.16 | b | 63.06 | c | 52.21 | 41.37 | 41.46 | f | 52.54 | b | |||||
1995 | 42.21 | 47.12 | p | 46.60 | a | 51.58 | e | 58.65 | 61.62 | a | 67.50 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.69 | f | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 38.92 | 41.82 | 45.00 | 49.64 | 55.28 | 60.11 | 63.99 | 63.87 | 59.04 | 51.73 | 43.99 | 39.99 | 51.05 | |||||||||||||
S.D. | 4.01 | 2.89 | 2.31 | 2.15 | 2.02 | 1.79 | 1.79 | 1.81 | 1.99 | 1.86 | 2.46 | 2.83 | 1.10 | |||||||||||||
SKEW | -0.97 | -0.52 | 0.10 | 0.05 | 0.32 | 0.64 | 0.34 | 0.37 | 0.20 | -0.60 | -0.44 | -0.20 | -0.09 | |||||||||||||
MAX | 46.03 | 47.16 | 49.77 | 55.09 | 60.65 | 65.38 | 69.40 | 68.15 | 63.53 | 55.26 | 48.60 | 45.13 | 53.80 | |||||||||||||
MIN | 26.45 | 33.19 | 39.39 | 45.07 | 50.74 | 56.50 | 59.90 | 60.61 | 54.68 | 46.79 | 35.78 | 34.45 | 48.53 | |||||||||||||
YRS | 81 | 81 | 81 | 80 | 80 | 80 | 77 | 75 | 77 | 78 | 78 | 79 | 66 |