YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | 39.50 | a | 43.43 | 48.00 | 51.05 | 55.71 | 59.75 | 63.35 | 64.27 | 58.10 | 51.56 | 41.67 | 40.24 | 51.39 | ||||||||||||
1916 | 25.56 | 37.62 | 43.53 | 48.97 | 52.00 | 58.02 | 60.11 | 62.78 | m | 56.60 | 47.00 | 40.68 | 33.74 | 45.80 | a | |||||||||||
1917 | 35.40 | 36.07 | 40.60 | 47.30 | 52.52 | 55.88 | a | 60.87 | a | 62.40 | a | 57.70 | 49.39 | 47.68 | 38.83 | a | 48.72 | |||||||||
1918 | ----- | z | 38.11 | 42.98 | 48.05 | 51.74 | 58.37 | 61.88 | a | 60.69 | 57.63 | 50.85 | 43.35 | 39.24 | 50.26 | a | ||||||||||
1919 | 39.52 | 37.82 | 42.87 | 47.97 | 52.31 | 54.65 | 59.06 | 60.31 | 56.28 | a | 45.06 | 41.12 | 36.50 | a | 47.79 | |||||||||||
1920 | 35.68 | 38.41 | 42.58 | 44.65 | 49.02 | c | 57.13 | c | 62.58 | 61.84 | 55.84 | a | 48.23 | 44.88 | 41.60 | a | 48.54 | |||||||||
1921 | 38.44 | 40.95 | 42.62 | a | 45.42 | 51.02 | a | 57.42 | 58.63 | 60.09 | b | 53.72 | a | 50.31 | 42.76 | a | 34.02 | 47.95 | ||||||||
1922 | ----- | z | ----- | z | ----- | z | 42.78 | a | ----- | z | 58.83 | 60.29 | 61.31 | 57.17 | ----- | z | ----- | z | ----- | z | 56.07 | g | ||||
1923 | ----- | z | ----- | z | 42.16 | 49.00 | ----- | z | ----- | z | 62.52 | 62.93 | a | 56.48 | ----- | z | ----- | z | 40.15 | 52.21 | f | |||||
1924 | 37.45 | a | 45.20 | a | 41.81 | 46.02 | ----- | z | 57.19 | c | ----- | z | 61.19 | ----- | z | 51.62 | a | 41.97 | a | ----- | z | 47.80 | d | |||
1925 | 40.00 | 44.02 | 42.92 | 48.29 | a | 54.64 | b | 57.59 | a | 60.68 | 59.97 | 56.57 | a | 47.09 | b | 43.28 | 43.61 | 49.89 | ||||||||
1926 | 38.42 | 43.70 | a | 45.29 | 51.97 | a | 53.45 | 59.07 | 61.05 | 59.47 | a | 53.45 | 50.83 | b | 45.83 | ----- | z | 51.14 | a | |||||||
1927 | 36.45 | 40.31 | a | 42.68 | a | 45.22 | 50.16 | 59.28 | 61.18 | 61.38 | a | 56.17 | 49.71 | 42.75 | 31.81 | 48.09 | ||||||||||
1928 | 40.50 | b | 40.09 | a | 45.08 | a | 47.80 | 55.63 | 57.88 | 62.58 | a | 59.15 | 53.93 | 48.73 | 43.87 | 38.55 | 49.48 | |||||||||
1929 | ----- | z | ----- | z | 44.23 | 44.75 | 51.80 | a | 57.17 | 60.03 | 60.74 | d | 55.77 | 51.22 | a | 40.58 | 37.71 | b | 50.40 | b | ||||||
1930 | 25.58 | 41.36 | c | 43.19 | 50.02 | 50.87 | a | 56.30 | 58.77 | a | 60.55 | 56.38 | 47.42 | a | 41.55 | 39.87 | 47.65 | |||||||||
1931 | 43.20 | c | 40.84 | 45.10 | a | 49.05 | a | 54.56 | 58.20 | 60.65 | 59.58 | 55.82 | 49.89 | 39.33 | ----- | z | 50.56 | a | ||||||||
1932 | 35.13 | 38.12 | 44.31 | 47.63 | 51.48 | 57.93 | 57.27 | 59.77 | 56.23 | 50.31 | 47.43 | 35.79 | 48.45 | |||||||||||||
1933 | 37.84 | 34.68 | 43.77 | 45.78 | 50.21 | 55.37 | 57.95 | 62.24 | 54.00 | 49.79 | 44.62 | 41.45 | a | 48.14 | ||||||||||||
1934 | 42.27 | a | 43.18 | 46.05 | 52.19 | a | 53.21 | 57.32 | 59.45 | 60.74 | 55.30 | 51.27 | 47.70 | 40.35 | a | 50.75 | ||||||||||
1935 | 36.40 | 42.62 | 40.69 | 45.45 | 51.47 | a | 57.35 | 60.11 | 60.42 | 57.28 | 47.84 | 40.86 | a | 42.76 | b | 48.61 | ||||||||||
1936 | 40.03 | 28.78 | b | 41.07 | a | 49.00 | 55.24 | 59.70 | 60.63 | a | 60.55 | 54.63 | 51.26 | 41.59 | a | 40.79 | 48.61 | |||||||||
1937 | 25.22 | a | 37.52 | f | 46.02 | c | 46.67 | a | 52.06 | 58.23 | 60.65 | ----- | z | 56.88 | a | 52.32 | a | 44.29 | b | 40.23 | 48.26 | b | ||||
1938 | 38.35 | 39.71 | 42.60 | a | 48.55 | 50.94 | n | 59.00 | g | 60.87 | 58.42 | 58.69 | a | 50.68 | 40.28 | 38.84 | 47.70 | b | ||||||||
1939 | 41.63 | 36.29 | 42.85 | 48.62 | 52.61 | c | 55.11 | b | 60.45 | 61.26 | 55.17 | 49.37 | 48.67 | 46.54 | h | 50.18 | a | |||||||||
1940 | 40.18 | 42.93 | 46.21 | 50.50 | 54.77 | 59.43 | 60.43 | b | 60.95 | 59.57 | h | ----- | z | 38.89 | k | 41.58 | 50.78 | c | ||||||||
1941 | 41.27 | 42.80 | 47.68 | 50.18 | 53.11 | 57.03 | 63.69 | 60.15 | 55.08 | 50.68 | 45.37 | 40.00 | 50.59 | |||||||||||||
1942 | 37.03 | 40.25 | 44.12 | a | 48.68 | 52.94 | 56.95 | 62.52 | 63.18 | 55.72 | 52.21 | b | 42.17 | a | 40.87 | 49.72 | ||||||||||
1943 | 30.18 | a | 42.32 | 40.69 | 49.78 | 49.84 | 55.74 | a | 59.77 | a | 59.55 | 57.70 | ----- | z | 44.28 | 37.25 | a | 47.92 | a | |||||||
1944 | ----- | z | 40.34 | 41.97 | 48.24 | a | 51.73 | 57.68 | 62.80 | a | 60.48 | 58.27 | 51.58 | 44.78 | a | 36.65 | a | 50.41 | a | |||||||
1945 | 40.42 | 42.09 | a | 42.74 | 44.78 | c | 55.07 | a | 56.04 | c | 61.45 | b | 59.98 | 54.31 | a | 49.89 | 40.92 | 38.44 | 48.84 | |||||||
1946 | 40.60 | 41.95 | 43.78 | a | 47.28 | 54.71 | 57.68 | 60.48 | b | 61.05 | c | 56.88 | a | 47.18 | 39.40 | a | 37.70 | a | 49.06 | |||||||
1947 | 33.93 | a | 42.20 | a | 44.89 | 49.87 | 55.15 | 58.40 | a | 61.18 | 59.76 | 56.97 | a | 50.37 | a | 41.40 | 40.24 | 49.53 | ||||||||
1948 | 37.95 | 37.41 | a | 41.66 | 46.33 | 52.18 | 60.52 | 60.10 | 60.16 | 55.73 | 47.87 | 41.97 | 33.27 | a | 47.93 | |||||||||||
1949 | 28.68 | 34.71 | 43.42 | 47.62 | 53.58 | 56.33 | 59.31 | 59.79 | 57.43 | 46.18 | 48.70 | 36.52 | 47.69 | |||||||||||||
1950 | 20.82 | 39.50 | 42.37 | 46.27 | 50.50 | 58.88 | 61.34 | 60.65 | 56.02 | 49.42 | 42.17 | 44.42 | 47.70 | |||||||||||||
1951 | 36.45 | 38.20 | 37.71 | 46.97 | 53.21 | 58.57 | 61.44 | 59.42 | 56.63 | 49.26 | 42.57 | 34.34 | 47.90 | |||||||||||||
1952 | 34.79 | 40.09 | 42.74 | 47.20 | 53.16 | 55.45 | 60.27 | 61.19 | 58.27 | 51.63 | 40.67 | 41.34 | 48.90 | |||||||||||||
1953 | 43.89 | 40.82 | 43.43 | a | 48.38 | 54.90 | 56.27 | 61.89 | 62.53 | 57.50 | 51.71 | 48.07 | 42.36 | b | 50.98 | |||||||||||
1954 | 33.79 | b | 42.11 | 40.37 | 45.03 | 52.76 | 55.11 | b | 58.29 | 59.91 | b | 57.24 | a | 49.28 | a | 48.70 | 41.37 | 48.66 | ||||||||
1955 | 38.79 | 37.46 | 38.13 | 44.09 | b | 49.55 | 56.62 | 58.55 | 58.80 | a | 55.37 | 49.69 | 36.92 | 36.21 | 46.68 | |||||||||||
1956 | 37.92 | 35.19 | 40.68 | 48.30 | 55.00 | 56.72 | 62.39 | 60.37 | 57.20 | b | 48.79 | 41.53 | a | 38.88 | b | 48.58 | ||||||||||
1957 | 28.58 | 36.80 | 43.81 | 48.92 | 56.87 | a | 59.63 | 59.84 | 60.16 | 60.16 | a | 49.87 | a | 42.28 | a | 43.17 | a | 49.17 | ||||||||
1958 | 43.06 | 46.98 | 43.77 | 48.72 | 58.77 | a | 64.32 | 67.53 | 63.89 | 58.10 | 50.69 | 41.67 | 41.74 | 52.44 | ||||||||||||
1959 | 38.71 | 39.43 | 43.66 | 48.38 | a | 53.58 | 60.07 | 63.79 | 60.11 | 56.78 | 49.65 | 41.17 | 39.40 | 49.56 | ||||||||||||
1960 | 37.08 | 40.98 | 42.90 | 49.52 | a | 53.23 | 58.60 | 64.03 | 61.50 | 56.24 | a | 51.74 | 43.05 | 37.98 | 49.74 | |||||||||||
1961 | 41.39 | 44.84 | 45.73 | 48.03 | 55.45 | b | 60.87 | 64.60 | 64.42 | 55.38 | 48.21 | 40.08 | 38.79 | 50.65 | ||||||||||||
1962 | 37.44 | 41.86 | 40.56 | 49.13 | 51.32 | 57.53 | 60.65 | 60.81 | 57.26 | a | 51.82 | 46.00 | 41.73 | 49.68 | ||||||||||||
1963 | 32.31 | 44.61 | 43.73 | 48.00 | 54.40 | 58.39 | c | 60.69 | 62.90 | 60.83 | a | 52.79 | 44.62 | 39.98 | 50.27 | |||||||||||
1964 | 41.53 | 40.07 | a | 42.74 | 45.78 | 51.85 | 58.47 | 61.24 | 60.84 | 55.92 | 50.45 | 40.58 | 34.02 | 48.62 | ||||||||||||
1965 | 36.61 | 40.89 | 41.73 | 48.55 | 50.95 | 58.15 | 63.63 | 62.92 | 55.70 | 52.35 | 45.98 | 38.42 | 49.66 | |||||||||||||
1966 | 38.13 | 40.66 | 43.74 | 47.70 | 52.35 | 57.72 | 60.42 | a | 61.60 | 59.67 | 49.21 | 44.38 | 43.97 | 49.96 | ||||||||||||
1967 | 41.23 | c | 41.86 | 41.79 | 45.75 | 53.85 | 61.57 | 63.26 | 65.50 | 60.15 | 53.10 | 44.50 | 39.92 | 51.04 | ||||||||||||
1968 | 39.58 | 43.40 | 46.82 | 46.73 | 54.23 | 58.00 | 63.77 | 58.79 | b | 57.15 | 50.42 | 45.10 | 34.53 | 49.88 | ||||||||||||
1969 | 27.85 | 39.46 | 43.58 | 47.52 | 55.98 | 62.60 | 61.44 | 59.94 | 58.97 | 49.34 | 45.72 | a | 41.78 | a | 49.52 | |||||||||||
1970 | 37.47 | 44.04 | a | 44.21 | 46.88 | 53.11 | 60.78 | 62.94 | 61.76 | 55.31 | a | 48.61 | 43.52 | 37.90 | 49.71 | |||||||||||
1971 | 37.00 | a | 40.86 | 40.56 | 47.40 | 53.94 | 55.63 | 63.08 | 65.02 | 56.47 | 49.13 | 45.09 | a | 35.18 | a | 49.11 | ||||||||||
1972 | 34.56 | 40.81 | 45.79 | 45.42 | 56.40 | 57.59 | a | 61.74 | 62.89 | 53.81 | a | 47.16 | 43.83 | 35.68 | 48.81 | |||||||||||
1973 | 37.62 | a | 41.36 | 44.16 | 47.48 | 55.35 | 58.80 | 61.65 | 60.02 | a | 59.78 | 49.94 | 40.27 | 42.87 | a | 49.94 | ||||||||||
1974 | 38.90 | 42.41 | 43.97 | 49.27 | 50.24 | 58.67 | 59.90 | 61.71 | 60.82 | 50.47 | 44.80 | 42.65 | 50.32 | |||||||||||||
1975 | 37.35 | 38.05 | 41.47 | 45.23 | 52.71 | b | 57.12 | 63.26 | 60.57 | a | 58.43 | 51.55 | 43.90 | a | 40.00 | 49.14 | ||||||||||
1976 | 40.89 | 40.52 | a | 40.26 | 48.05 | 53.61 | 56.00 | 62.63 | 60.55 | 59.38 | 51.00 | 43.85 | 42.55 | 49.94 | ||||||||||||
1977 | 35.11 | 44.84 | 43.31 | 49.73 | 52.60 | 59.42 | 60.98 | 65.35 | 55.93 | 50.03 | 41.64 | a | 38.08 | 49.75 | ||||||||||||
1978 | 38.71 | 43.32 | 46.00 | 49.25 | 53.31 | 61.67 | 64.03 | 63.55 | 57.28 | 52.05 | 38.82 | 36.29 | 50.36 | |||||||||||||
1979 | 30.98 | 39.59 | 45.90 | 48.53 | 55.32 | 58.57 | 63.87 | 63.15 | 60.82 | 52.66 | 41.77 | 43.50 | 50.39 | |||||||||||||
1980 | 33.53 | 43.59 | 43.63 | 51.77 | b | 54.77 | 57.78 | 62.85 | 61.27 | 58.57 | 52.56 | 45.55 | 41.27 | a | 50.60 | |||||||||||
1981 | 42.93 | a | 42.68 | 47.33 | a | 49.05 | 55.16 | 57.52 | 62.94 | 65.97 | 59.82 | 50.03 | 47.40 | 40.66 | 51.79 | |||||||||||
1982 | 37.23 | 41.24 | a | 43.37 | 46.78 | 54.15 | 62.83 | 62.42 | a | 62.63 | 59.80 | ----- | z | 41.07 | a | 40.34 | 50.17 | a | ||||||||
1983 | 44.19 | 45.77 | 48.39 | 49.33 | 57.60 | 59.60 | 62.19 | 64.71 | 56.70 | 49.74 | 46.98 | a | 32.81 | b | 51.50 | |||||||||||
1984 | 40.98 | 44.21 | 47.23 | 48.88 | 52.91 | c | 58.58 | ----- | z | 62.65 | 56.87 | 47.88 | a | 43.12 | 32.98 | 48.75 | a | |||||||||
1985 | 33.60 | a | 38.13 | b | 41.71 | 48.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.37 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 36.88 | 40.67 | 43.39 | 47.82 | 53.30 | 58.14 | 61.42 | 61.36 | 56.97 | 50.00 | 43.33 | 39.01 | 49.41 | |||||||||||||
S.D. | 4.85 | 3.10 | 2.17 | 1.89 | 2.00 | 1.90 | 1.82 | 1.75 | 1.80 | 1.73 | 2.64 | 3.11 | 1.19 | |||||||||||||
SKEW | -1.18 | -0.89 | 0.05 | -0.14 | 0.15 | 0.78 | 0.34 | 0.83 | 0.31 | -0.49 | 0.23 | -0.46 | 0.20 | |||||||||||||
MAX | 44.19 | 46.98 | 48.39 | 52.19 | 58.77 | 64.32 | 67.53 | 65.97 | 60.83 | 53.10 | 48.70 | 44.42 | 52.44 | |||||||||||||
MIN | 20.82 | 28.78 | 37.71 | 42.78 | 49.02 | 54.65 | 57.27 | 58.42 | 53.45 | 45.06 | 36.92 | 31.81 | 46.68 | |||||||||||||
YRS | 66 | 67 | 70 | 71 | 66 | 68 | 68 | 68 | 68 | 65 | 67 | 65 | 54 |