YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | 27.18 | c | 36.93 | 36.19 | 40.28 | a | 45.36 | c | 50.27 | 52.48 | 52.30 | a | 52.00 | 46.81 | 40.83 | 31.48 | 42.68 | |||||||||
1910 | 33.10 | 32.14 | 40.45 | 40.96 | c | 48.00 | 49.97 | 52.84 | 51.45 | 50.39 | g | 45.45 | 38.63 | 38.74 | 42.89 | a | ||||||||||
1911 | 33.71 | 34.50 | b | 37.84 | 38.37 | 45.39 | 48.83 | 54.58 | 51.74 | 50.80 | 44.53 | n | 40.57 | 37.61 | 43.09 | a | ||||||||||
1912 | 37.14 | b | 38.66 | 36.68 | 43.90 | 49.10 | 51.76 | a | 57.45 | 54.45 | 52.20 | 46.39 | 43.53 | 39.74 | 45.92 | |||||||||||
1913 | 35.10 | 36.43 | 37.90 | 43.30 | 48.23 | 53.83 | 55.74 | 56.71 | 53.43 | 47.23 | 43.27 | 36.52 | f | 46.47 | a | |||||||||||
1914 | 42.66 | b | 37.36 | 38.04 | e | 39.90 | a | 47.31 | b | 49.73 | d | ----- | z | 53.84 | 51.03 | 49.58 | 47.07 | a | ----- | z | 45.65 | b | ||||
1915 | 32.65 | h | 38.75 | 40.71 | 43.67 | 46.88 | f | 52.40 | 54.52 | 54.87 | 50.20 | 46.16 | 37.07 | 39.26 | 45.76 | b | ||||||||||
1916 | 26.39 | 34.62 | 37.13 | 40.07 | 42.48 | 50.33 | 52.81 | 53.55 | 48.63 | 41.10 | 37.03 | 34.16 | 41.53 | |||||||||||||
1917 | 33.58 | 35.68 | 35.29 | 40.10 | 45.29 | 48.67 | 52.29 | 52.10 | 51.20 | 45.58 | 42.43 | 37.55 | 43.31 | |||||||||||||
1918 | 36.68 | 31.00 | 34.65 | 39.10 | ----- | z | 50.40 | 53.87 | 55.00 | 51.27 | 47.90 | a | 40.37 | 36.10 | 43.30 | a | ||||||||||
1919 | 36.97 | a | 37.61 | 39.94 | 44.30 | 46.71 | ----- | z | ----- | z | ----- | z | 51.76 | a | 43.07 | d | 37.07 | 28.71 | 40.68 | c | ||||||
1920 | 28.60 | a | 23.00 | 28.77 | a | 28.77 | 34.94 | 43.26 | g | 49.87 | 48.23 | 46.50 | ----- | z | 38.30 | 41.16 | 36.81 | b | ||||||||
1921 | 37.92 | g | 37.88 | b | 38.32 | 39.97 | 44.90 | 52.60 | 51.13 | 53.26 | 48.90 | 45.42 | 41.27 | 34.06 | 44.34 | a | ||||||||||
1922 | 30.87 | 32.39 | 34.77 | 39.33 | 44.97 | 51.43 | 52.65 | 54.10 | 51.57 | 47.77 | 37.07 | 33.16 | 42.51 | |||||||||||||
1923 | 34.66 | b | 30.07 | 36.03 | a | 42.43 | 45.90 | 51.50 | 54.29 | 54.77 | a | 52.21 | b | 44.13 | a | 42.00 | 37.32 | 43.78 | ||||||||
1924 | 35.10 | a | 40.56 | b | 36.84 | 40.17 | a | 47.26 | 51.10 | a | 52.72 | b | 53.80 | a | 50.37 | 46.32 | 38.53 | 31.26 | 43.67 | |||||||
1925 | 37.35 | 39.68 | 38.03 | 43.27 | 47.97 | 50.77 | 53.87 | 53.94 | 51.50 | 43.65 | 39.17 | 40.45 | 44.97 | |||||||||||||
1926 | 35.90 | 40.46 | 40.29 | 45.30 | 48.77 | 52.80 | 54.87 | 54.68 | 48.87 | 47.32 | 42.76 | a | 36.30 | a | 45.69 | |||||||||||
1927 | 35.94 | 35.79 | 37.23 | 40.33 | 45.45 | 52.34 | a | 54.61 | 55.84 | 52.20 | 46.71 | 41.93 | 32.13 | 44.21 | ||||||||||||
1928 | 36.32 | 35.86 | 40.39 | 41.77 | 47.94 | 51.73 | 55.71 | 53.23 | 50.33 | 47.43 | a | 41.57 | 35.43 | a | 44.81 | |||||||||||
1929 | 28.75 | c | 28.07 | a | 37.97 | a | 39.32 | b | 45.84 | 50.80 | 53.22 | d | 54.63 | a | 50.68 | b | 46.23 | i | 37.69 | a | 38.70 | d | 42.33 | a | ||
1930 | 24.72 | b | 37.37 | a | 38.33 | a | 44.14 | a | 44.07 | a | 50.13 | 52.34 | b | 55.23 | 51.32 | b | 43.28 | f | 37.17 | g | 36.90 | b | 43.46 | b | ||
1931 | 40.32 | 37.54 | 40.16 | ----- | z | ----- | z | 51.83 | a | 54.55 | 53.97 | 53.20 | 45.84 | 38.40 | 37.03 | 45.28 | b | |||||||||
1932 | 34.20 | a | 35.21 | 40.77 | 43.24 | a | 46.23 | 51.07 | 52.52 | 55.29 | 49.70 | 47.90 | 43.67 | 33.55 | 44.44 | |||||||||||
1933 | 35.81 | 32.46 | 38.32 | 39.70 | 45.16 | 50.03 | 52.10 | a | 56.16 | 50.03 | 46.16 | 42.33 | 39.65 | 43.99 | ||||||||||||
1934 | 40.13 | 39.43 | 42.84 | 46.30 | 49.52 | 51.33 | 53.94 | 55.71 | 51.07 | 47.29 | 44.77 | 38.77 | 46.76 | |||||||||||||
1935 | 35.35 | 38.14 | 36.43 | a | 39.33 | 45.13 | 51.87 | 54.10 | 54.13 | 52.47 | 44.55 | 37.32 | b | 38.48 | 43.94 | |||||||||||
1936 | 38.61 | 29.28 | 36.87 | 44.14 | a | 49.26 | 54.33 | 55.19 | 56.00 | 50.23 | 48.74 | 38.73 | 39.13 | 45.04 | ||||||||||||
1937 | 25.52 | 34.79 | 40.33 | a | 41.97 | 46.23 | 53.27 | 54.68 | 54.83 | a | 52.77 | 48.19 | 42.77 | 39.94 | 44.61 | |||||||||||
1938 | 36.90 | 36.46 | 39.32 | 43.57 | 46.81 | 51.73 | 54.90 | 52.52 | 53.07 | 46.39 | 38.20 | 37.74 | 44.80 | |||||||||||||
1939 | 39.45 | 34.11 | 37.94 | 42.90 | 46.39 | 49.97 | 54.00 | 54.87 | 50.57 | 46.00 | 43.10 | 41.13 | 45.03 | |||||||||||||
1940 | 36.90 | 38.83 | 41.32 | 44.33 | 47.65 | 51.70 | 54.81 | 54.77 | 54.40 | 49.06 | 37.30 | 38.84 | 45.83 | |||||||||||||
1941 | 37.10 | 37.64 | 40.84 | 43.97 | 47.55 | 52.10 | a | 57.52 | 55.10 | 50.90 | 42.97 | 43.00 | a | 36.97 | 45.47 | |||||||||||
1942 | 34.42 | 35.14 | 37.48 | 42.43 | 47.50 | a | 50.77 | 58.48 | 57.16 | 51.87 | 47.30 | a | 38.57 | 38.73 | a | 44.99 | ||||||||||
1943 | 28.97 | 35.86 | 36.29 | 43.33 | 45.35 | 50.33 | 53.59 | d | 53.36 | c | 52.20 | 47.32 | 40.63 | 35.38 | b | 43.55 | ||||||||||
1944 | 35.29 | 35.86 | 36.06 | 42.03 | 45.68 | 50.57 | 54.69 | e | 55.21 | b | 53.40 | 48.42 | 39.23 | 33.70 | a | 44.18 | ||||||||||
1945 | 36.58 | 37.04 | b | 36.82 | c | 40.23 | 48.53 | a | 50.31 | a | 54.50 | a | 53.81 | 49.30 | 45.83 | a | 39.47 | 35.70 | a | 44.01 | ||||||
1946 | 37.06 | 36.79 | 37.41 | b | 41.60 | 47.57 | a | 51.29 | b | 55.96 | c | ----- | z | 50.20 | j | 42.79 | b | 35.71 | i | 35.39 | 42.87 | c | ||||
1947 | 31.63 | a | ----- | z | 39.89 | c | 43.26 | c | 48.73 | a | 52.54 | b | 55.71 | 53.83 | g | ----- | z | ----- | z | 39.97 | 39.00 | 43.84 | d | |||
1948 | 34.13 | 35.34 | 36.42 | 39.70 | 46.57 | a | 53.93 | 53.97 | a | 55.39 | 49.77 | 44.23 | 39.70 | 33.42 | 43.55 | |||||||||||
1949 | 26.39 | 32.07 | 38.52 | 42.53 | 47.48 | 49.83 | 52.03 | 54.19 | 51.00 | 42.19 | 43.90 | 35.93 | a | 43.01 | ||||||||||||
1950 | 21.61 | 34.46 | 37.26 | 38.77 | 42.23 | 51.17 | 53.45 | 53.77 | 49.90 | 45.26 | 39.62 | a | 41.20 | a | 42.39 | |||||||||||
1951 | 33.32 | 35.50 | 34.39 | 39.55 | a | 45.61 | 50.97 | 54.06 | 52.87 | 51.43 | 45.71 | 39.60 | 33.55 | 43.05 | ||||||||||||
1952 | 33.45 | 36.38 | 37.10 | 39.63 | 45.35 | 48.67 | f | 53.20 | a | 54.90 | 50.70 | 47.48 | 37.10 | 37.30 | a | 42.96 | a | |||||||||
1953 | 41.26 | 38.14 | 39.87 | 40.77 | 46.74 | 49.83 | 53.48 | b | 53.87 | 51.10 | 46.35 | 42.80 | 37.00 | 45.10 | ||||||||||||
1954 | 31.71 | 35.36 | 36.10 | a | 42.00 | 46.46 | e | 50.57 | 53.23 | 54.58 | 53.67 | 45.19 | 47.00 | 39.00 | a | 44.57 | ||||||||||
1955 | 36.00 | a | 33.92 | c | 33.90 | 37.93 | 43.55 | 48.37 | 52.39 | 51.68 | 50.10 | 45.84 | 34.38 | a | 34.13 | a | 41.85 | |||||||||
1956 | 34.30 | a | 31.62 | 35.68 | 40.20 | 47.35 | 49.90 | 55.71 | 56.19 | 53.03 | 46.22 | d | 39.67 | 38.00 | 43.99 | |||||||||||
1957 | 29.74 | 33.61 | 38.90 | 43.23 | 50.77 | 52.62 | f | ----- | z | ----- | z | 52.18 | h | 45.76 | f | 40.60 | 40.19 | 39.58 | e | |||||||
1958 | ----- | z | 43.21 | 37.77 | a | 42.73 | 50.90 | a | 56.14 | a | 58.93 | a | 57.07 | b | 53.16 | e | 46.79 | c | 39.41 | h | ----- | z | 49.63 | c | ||
1959 | 37.03 | a | 37.21 | d | 39.73 | a | 43.43 | 46.23 | 52.23 | 56.81 | d | 54.70 | a | 51.38 | a | 47.16 | 38.80 | 37.47 | a | 45.18 | ||||||
1960 | 35.83 | a | 37.59 | 38.58 | 43.20 | 47.13 | 51.60 | 55.97 | 55.45 | 51.27 | 48.74 | d | 40.13 | 35.94 | o | 45.95 | a | |||||||||
1961 | 38.04 | g | 39.89 | 39.00 | d | ----- | z | 46.69 | r | 52.24 | i | 57.06 | n | 57.00 | j | 49.47 | k | 44.18 | c | 38.12 | e | 38.07 | q | 40.30 | h | |
1962 | 34.37 | d | 37.46 | 34.10 | k | 43.64 | b | 46.13 | 49.00 | i | 52.12 | f | 54.24 | j | 52.57 | i | 48.31 | b | 43.78 | c | 40.77 | a | 42.07 | e | ||
1963 | 31.94 | 41.75 | 39.00 | c | 43.28 | a | 47.84 | 51.41 | a | 53.52 | b | 55.23 | 54.34 | a | 47.58 | g | 41.67 | 38.46 | c | 45.31 | a | |||||
1964 | ----- | z | ----- | z | 38.87 | a | 40.37 | 45.16 | 51.07 | ----- | z | ----- | z | 50.83 | 46.32 | 36.24 | i | 32.77 | 43.63 | e | ||||||
1965 | 36.10 | 38.43 | 37.45 | 43.27 | 45.58 | 52.20 | 56.77 | a | 57.74 | 50.83 | 48.71 | 44.57 | 36.42 | 45.67 | ||||||||||||
1966 | 36.90 | 36.61 | 38.40 | a | 43.00 | 46.74 | 52.70 | 55.39 | 55.87 | 54.77 | 46.39 | 41.27 | 42.13 | 45.85 | ||||||||||||
1967 | 38.74 | 37.86 | 37.13 | 39.67 | 48.19 | 55.00 | 56.42 | 58.26 | 54.87 | 48.00 | 41.00 | 36.03 | 45.93 | |||||||||||||
1968 | 34.84 | 37.69 | 41.71 | 41.20 | 47.94 | 52.47 | 56.55 | 56.90 | 52.24 | a | 45.60 | a | 41.17 | 32.39 | 45.06 | |||||||||||
1969 | 28.39 | 35.07 | 37.52 | 42.33 | 49.16 | 56.97 | 54.77 | 54.42 | 53.03 | 44.68 | 40.70 | 39.35 | 44.70 | |||||||||||||
1970 | 35.84 | 38.43 | 37.57 | a | 40.23 | 45.87 | 53.70 | 54.84 | 54.77 | 49.52 | c | 44.10 | 40.00 | 34.94 | 44.15 | |||||||||||
1971 | 35.65 | 36.50 | 35.71 | 41.23 | 47.19 | 50.37 | 55.65 | 58.68 | 50.73 | 44.71 | 41.93 | 33.42 | 44.31 | |||||||||||||
1972 | 31.10 | 35.66 | 40.71 | 39.80 | 48.87 | 52.07 | 55.61 | 56.45 | 49.57 | 43.35 | 41.03 | 33.74 | 44.00 | |||||||||||||
1973 | 33.65 | 37.25 | 40.32 | 42.23 | 48.00 | 52.23 | 55.13 | 53.45 | 53.17 | 47.10 | 38.90 | 40.10 | 45.13 | |||||||||||||
1974 | 33.71 | 38.04 | 38.35 | 42.00 | a | 45.06 | 51.63 | 55.10 | 56.48 | 54.03 | 45.39 | 41.97 | 38.74 | 45.04 | ||||||||||||
1975 | 35.90 | 35.25 | 36.52 | 39.03 | 47.16 | 51.73 | 56.13 | 54.84 | 52.67 | 47.55 | 40.40 | 37.19 | 44.53 | |||||||||||||
1976 | 38.45 | 36.28 | 36.19 | 42.37 | 47.77 | 50.23 | 55.39 | 55.87 | 53.67 | 46.19 | 41.37 | 38.42 | 45.18 | |||||||||||||
1977 | 33.13 | 39.57 | 38.29 | 44.07 | 46.55 | 52.80 | 54.77 | 58.87 | 51.23 | 45.16 | 37.50 | 37.39 | 44.94 | |||||||||||||
1978 | 38.35 | 41.11 | 40.26 | 42.80 | 46.48 | 54.55 | a | 56.00 | 56.35 | 53.53 | 47.94 | 35.53 | 35.97 | a | 45.74 | |||||||||||
1979 | 30.62 | j | 29.67 | j | 40.74 | 42.54 | d | 50.19 | 52.97 | ----- | z | 57.06 | m | 55.28 | a | 47.71 | 39.47 | 40.23 | 46.14 | d | ||||||
1980 | 30.87 | a | 38.66 | 39.35 | 44.03 | 47.93 | a | 51.63 | c | 55.65 | 54.71 | 52.70 | 47.84 | 42.90 | 40.23 | 45.54 | ||||||||||
1981 | 38.43 | a | 36.75 | d | 41.29 | 41.68 | b | 47.84 | 51.97 | 55.30 | d | 58.32 | 52.37 | 43.90 | 40.90 | 36.65 | 45.45 | |||||||||
1982 | 33.35 | 36.37 | a | 36.68 | 39.23 | 46.03 | a | 53.80 | 54.07 | a | 55.84 | 52.33 | 46.21 | b | 37.22 | c | 34.13 | 43.77 | ||||||||
1983 | 37.61 | 40.54 | 40.35 | 42.48 | a | 49.81 | 53.03 | 55.77 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.66 | e | ||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 34.31 | 36.24 | 38.06 | 41.58 | 46.72 | 51.67 | 54.55 | 54.82 | 51.62 | 46.17 | 40.43 | 36.90 | 44.46 | |||||||||||||
S.D. | 4.09 | 3.25 | 2.21 | 2.40 | 2.23 | 1.63 | 1.67 | 1.83 | 1.68 | 1.78 | 2.53 | 2.85 | 1.12 | |||||||||||||
SKEW | -0.82 | -1.18 | -0.86 | -1.99 | -2.02 | 0.76 | 0.01 | -0.43 | -0.14 | -0.53 | 0.24 | -0.48 | -0.59 | |||||||||||||
MAX | 42.66 | 43.21 | 42.84 | 46.30 | 50.90 | 56.97 | 58.93 | 58.87 | 55.28 | 49.58 | 47.07 | 42.13 | 46.76 | |||||||||||||
MIN | 21.61 | 23.00 | 28.77 | 28.77 | 34.94 | 48.37 | 49.87 | 48.23 | 46.50 | 41.10 | 34.38 | 28.71 | 41.53 | |||||||||||||
YRS | 69 | 72 | 74 | 73 | 71 | 69 | 68 | 66 | 68 | 67 | 70 | 69 | 51 |