YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1906 | 34.65 | 41.79 | 40.65 | 40.27 | 45.45 | 50.13 | 61.61 | 57.39 | 51.87 | 47.58 | 36.43 | 37.42 | 45.44 | |||||||||||||
1907 | 34.26 | 41.50 | 38.03 | 42.50 | 44.16 | 47.77 | 57.39 | 54.13 | 49.23 | 49.03 | 39.10 | 35.45 | 44.38 | |||||||||||||
1908 | 36.32 | 35.17 | 38.16 | 40.70 | 40.81 | 46.03 | 61.35 | 57.97 | 52.53 | 42.55 | 39.60 | 33.90 | 43.76 | |||||||||||||
1909 | 35.58 | 34.64 | 34.61 | 39.90 | 43.97 | 51.40 | 55.37 | a | 60.97 | a | 52.40 | 43.81 | 36.70 | 33.71 | 43.59 | |||||||||||
1910 | 33.92 | f | 31.96 | c | 39.23 | 44.30 | 47.13 | 48.70 | 59.32 | 59.58 | 53.53 | 46.97 | 39.80 | 35.06 | 45.96 | a | ||||||||||
1911 | 36.42 | 31.39 | 39.20 | a | 38.53 | 39.87 | 47.70 | 58.61 | 54.03 | 49.80 | 43.42 | 38.20 | 29.94 | 42.26 | ||||||||||||
1912 | 35.35 | 32.17 | 36.29 | 37.00 | 44.71 | 50.73 | 54.74 | 52.52 | 50.20 | 43.97 | 39.87 | 31.23 | 42.40 | |||||||||||||
1913 | 29.74 | 33.18 | 34.45 | 37.27 | 43.45 | 48.77 | 56.48 | 58.74 | 55.00 | 45.39 | 39.27 | 34.13 | 42.99 | |||||||||||||
1914 | 35.42 | 35.32 | 38.90 | 40.60 | 42.27 | a | 48.10 | a | 56.19 | 53.90 | 50.07 | 46.90 | 40.73 | 31.52 | 43.33 | |||||||||||
1915 | 32.39 | 32.04 | a | 35.71 | 39.40 | e | 42.16 | 47.17 | 53.68 | 55.52 | 50.50 | 44.32 | 37.07 | 33.77 | 41.98 | |||||||||||
1916 | 35.10 | b | 38.21 | a | 40.94 | 40.17 | 40.94 | 47.00 | a | 56.35 | 54.19 | 50.63 | 39.10 | 35.80 | 30.55 | 42.42 | ||||||||||
1917 | 31.52 | 33.25 | 32.39 | 37.83 | 41.45 | 48.47 | 60.71 | 55.84 | 51.80 | 47.29 | 38.03 | 34.77 | 42.78 | |||||||||||||
1918 | 32.87 | 35.43 | 41.71 | 38.93 | 42.29 | 55.63 | 56.42 | 55.84 | 53.53 | 50.00 | 37.10 | 32.68 | 44.37 | |||||||||||||
1919 | 33.32 | 32.36 | 34.68 | 39.17 | 45.94 | 48.13 | 60.71 | 58.03 | 53.20 | 40.00 | b | 36.30 | 35.16 | 43.08 | ||||||||||||
1920 | 37.32 | 37.48 | 35.71 | 37.17 | 43.16 | 46.67 | 56.55 | 56.58 | 48.93 | 40.19 | 36.87 | 31.84 | 42.37 | |||||||||||||
1921 | 32.19 | 33.86 | 38.23 | 36.37 | 43.10 | 48.47 | 59.10 | 57.39 | 49.13 | 46.17 | b | 37.79 | a | 43.61 | 43.78 | |||||||||||
1922 | 32.97 | 32.21 | 32.90 | 33.13 | 40.19 | 43.53 | 54.97 | 55.90 | 52.03 | 41.42 | 35.47 | 36.00 | 40.89 | |||||||||||||
1923 | 35.06 | 34.07 | 35.13 | 40.23 | 42.84 | 44.70 | 55.29 | 53.55 | 53.77 | 41.45 | 41.47 | 36.23 | 42.82 | |||||||||||||
1924 | 30.42 | 34.07 | 34.55 | 39.10 | 44.00 | 49.86 | a | 52.77 | 54.26 | 52.93 | 40.42 | 37.33 | 31.10 | 41.73 | ||||||||||||
1925 | 31.10 | a | 35.36 | 35.68 | 40.13 | 45.00 | s | 50.23 | 58.00 | 51.58 | 46.10 | 43.48 | 36.80 | 39.06 | 42.50 | a | ||||||||||
1926 | 32.19 | 37.93 | 40.35 | 45.13 | 43.29 | 49.93 | 55.13 | 53.96 | d | 44.93 | 42.10 | 39.80 | 34.32 | 43.26 | ||||||||||||
1927 | 36.13 | 37.75 | 36.16 | 39.30 | 42.77 | 48.90 | 58.68 | 55.87 | 48.00 | 45.10 | 40.13 | 34.23 | 43.58 | |||||||||||||
1928 | 35.19 | 34.03 | 38.13 | 37.50 | 47.06 | 49.73 | 55.74 | 55.32 | 51.80 | 42.94 | 39.77 | 33.32 | 43.38 | |||||||||||||
1929 | 31.61 | 30.14 | 34.48 | 36.77 | 42.81 | 47.73 | 54.29 | 60.00 | 51.13 | 43.90 | 35.50 | 35.10 | 41.96 | |||||||||||||
1930 | 32.81 | 35.57 | 35.65 | 39.80 | 39.35 | 45.60 | 52.19 | 54.32 | 44.93 | 39.61 | 36.43 | 28.48 | 40.40 | |||||||||||||
1931 | 32.13 | 36.00 | 34.87 | 39.27 | 44.26 | 46.33 | 59.81 | 55.42 | 47.57 | 42.90 | 34.47 | 31.16 | 42.02 | |||||||||||||
1932 | 29.94 | 34.21 | 35.97 | 36.10 | 40.45 | 46.27 | 51.61 | 51.61 | 48.40 | 40.45 | 36.67 | 28.58 | 40.02 | |||||||||||||
1933 | 27.84 | 27.39 | 30.61 | 34.43 | 36.42 | 44.33 | 55.16 | 53.61 | 45.63 | 43.23 | 35.80 | 32.23 | 38.89 | |||||||||||||
1934 | 31.29 | 34.96 | 39.42 | 39.17 | 42.26 | 44.73 | 55.00 | 55.00 | 48.00 | 42.35 | 35.87 | 37.13 | 42.10 | |||||||||||||
1935 | 34.32 | 36.54 | 32.74 | 39.90 | 41.03 | 46.07 | 50.16 | 56.26 | 51.33 | 39.77 | 32.63 | 31.16 | 40.99 | |||||||||||||
1936 | 30.35 | 34.34 | 35.23 | 36.60 | 40.90 | 48.30 | 57.74 | 55.16 | 48.07 | 41.81 | 37.23 | 32.16 | 41.49 | |||||||||||||
1937 | 23.84 | 30.43 | 32.87 | 34.47 | 41.97 | 45.50 | 53.55 | 53.68 | 50.47 | 40.68 | 34.17 | 33.97 | 39.63 | |||||||||||||
1938 | 32.52 | 32.07 | 33.52 | 35.37 | 40.39 | 44.93 | 52.16 | 52.16 | 47.57 | 38.68 | 30.30 | 33.29 | 39.41 | |||||||||||||
1939 | 28.06 | 25.00 | 31.32 | 40.33 | 41.48 | 45.97 | 53.65 | 57.29 | 54.03 | 42.03 | 36.77 | 36.52 | 41.04 | |||||||||||||
1940 | 35.81 | 34.41 | 36.19 | 40.97 | 43.84 | 47.80 | 50.26 | 52.68 | 46.47 | 41.52 | 33.93 | 36.00 | 41.66 | |||||||||||||
1941 | 32.77 | 37.79 | 36.55 | 36.23 | 44.52 | 43.93 | 52.19 | 49.29 | 41.90 | 40.42 | 36.63 | 32.06 | 40.36 | |||||||||||||
1942 | 32.81 | 29.46 | 31.77 | 37.53 | 39.77 | 44.83 | a | 56.87 | 55.16 | 43.63 | 40.10 | 34.50 | 30.87 | 39.78 | ||||||||||||
1943 | 31.37 | a | 34.86 | 34.20 | a | 39.27 | 42.94 | 44.60 | ----- | z | 55.97 | 50.20 | 43.19 | 34.60 | 34.55 | 40.52 | a | |||||||||
1944 | 30.87 | 30.55 | 33.23 | 34.87 | 41.35 | 42.80 | 45.16 | 49.42 | 46.17 | 39.83 | a | ----- | z | 33.65 | 38.90 | a | ||||||||||
1945 | 31.16 | 33.18 | 31.81 | 35.10 | 38.94 | 44.63 | 56.13 | 55.71 | 50.47 | 43.58 | 32.23 | 32.35 | 40.44 | |||||||||||||
1946 | 29.26 | 26.89 | 32.29 | 38.23 | 39.81 | 44.73 | 53.26 | 53.39 | 50.03 | 38.94 | 33.87 | 34.13 | 39.57 | |||||||||||||
1947 | 27.61 | 32.86 | 35.81 | 38.63 | 41.84 | 44.47 | 49.00 | 50.90 | 50.67 | 41.19 | 30.85 | c | 30.29 | 39.51 | ||||||||||||
1948 | 28.52 | 28.28 | 29.32 | f | 37.32 | h | 39.41 | b | 44.62 | a | 49.29 | 49.81 | 48.60 | 42.61 | 32.20 | 27.84 | 39.12 | b | ||||||||
1949 | 23.71 | 27.39 | 30.06 | 39.10 | 41.32 | 46.87 | 51.55 | 49.71 | 49.93 | 39.97 | 39.73 | 29.42 | 39.06 | |||||||||||||
1950 | 27.00 | 31.93 | 32.97 | 38.40 | 38.29 | 42.00 | 54.87 | 49.77 | 46.73 | 43.32 | 39.23 | 35.29 | 39.98 | |||||||||||||
1951 | 29.86 | c | 29.88 | k | 33.00 | 38.83 | 40.68 | 43.40 | 54.29 | 52.29 | 47.60 | 40.89 | d | 33.37 | 30.32 | 40.41 | a | |||||||||
1952 | 28.10 | 30.63 | b | 31.68 | 39.21 | a | 41.90 | a | 39.87 | 51.03 | 53.55 | 49.63 | 40.65 | 32.67 | 33.21 | b | 39.34 | |||||||||
1953 | 35.06 | 28.79 | 31.39 | 34.37 | 36.42 | 42.07 | 55.90 | 49.16 | 44.43 | 37.06 | 35.20 | 27.48 | 38.11 | |||||||||||||
1954 | 26.87 | 30.71 | 29.87 | 35.07 | 40.71 | c | 45.81 | c | 55.72 | b | 45.70 | d | 45.14 | a | 36.68 | c | 32.52 | c | 26.87 | a | 37.64 | |||||
1955 | 26.19 | 25.89 | a | 29.27 | a | 29.46 | b | 36.92 | g | 42.54 | f | 44.65 | 56.19 | 47.80 | 38.55 | 32.90 | 30.65 | 36.15 | b | |||||||
1956 | 30.81 | 26.00 | 28.06 | 34.10 | 41.03 | 47.53 | 52.13 | 45.65 | 50.10 | 37.71 | 33.60 | 29.65 | 38.03 | |||||||||||||
1957 | 30.61 | 34.07 | 33.45 | 34.14 | b | 38.67 | a | 49.79 | a | 52.26 | 54.29 | 48.25 | f | 42.71 | 33.30 | 33.90 | 39.75 | a | ||||||||
1958 | 30.58 | 33.86 | 31.13 | 36.07 | 42.74 | 44.10 | 47.23 | 56.90 | a | 49.83 | 45.68 | 33.53 | 31.68 | 40.28 | ||||||||||||
1959 | 31.65 | 29.07 | 34.17 | h | 40.60 | 40.10 | 47.93 | 58.42 | 54.10 | 46.77 | 41.71 | 36.57 | 33.58 | 41.86 | a | |||||||||||
1960 | 27.71 | 31.17 | 34.21 | b | 36.90 | a | 37.72 | b | ----- | z | 51.71 | 50.06 | 48.30 | 37.58 | 31.00 | a | 25.27 | a | 37.42 | a | ||||||
1961 | 28.58 | 28.07 | a | 31.03 | 35.86 | a | 37.33 | a | 47.50 | d | 55.06 | 54.33 | a | 45.47 | 38.46 | c | 31.48 | a | 31.29 | 38.71 | ||||||
1962 | 29.00 | 33.54 | 31.68 | 37.10 | 38.10 | 44.33 | 49.84 | 53.03 | 48.03 | 40.26 | 34.33 | 31.37 | a | 39.22 | ||||||||||||
1963 | 26.74 | 36.64 | 30.87 | 32.00 | 40.26 | 44.47 | 49.74 | 54.03 | 51.70 | 44.42 | 36.89 | b | 31.84 | 39.97 | ||||||||||||
1964 | 27.77 | 28.45 | 31.81 | 35.33 | 39.23 | 45.00 | 53.45 | 54.42 | 45.57 | 46.45 | 33.33 | 30.97 | 39.31 | |||||||||||||
1965 | 31.13 | 29.61 | 33.61 | 35.73 | 39.97 | 42.57 | ----- | z | 53.65 | 44.13 | 42.10 | ----- | z | 32.45 | 38.49 | b | ||||||||||
1966 | 27.65 | 27.54 | 31.90 | 35.90 | 40.71 | 44.90 | 49.68 | 53.16 | 46.97 | 41.19 | 33.82 | b | 31.57 | j | 39.40 | a | ||||||||||
1967 | 31.00 | 30.89 | 35.39 | 31.60 | 41.77 | 42.90 | 56.74 | 59.39 | 51.23 | 41.32 | 40.17 | 29.35 | 40.98 | |||||||||||||
1968 | 31.35 | 37.93 | 35.10 | 35.33 | 40.81 | 44.07 | 51.77 | ----- | z | 41.27 | 35.16 | 33.13 | 25.32 | 37.39 | a | |||||||||||
1969 | 36.58 | 32.55 | f | 33.19 | 37.00 | 41.32 | 43.48 | a | 52.10 | 54.42 | 50.27 | 38.00 | 40.07 | 30.35 | 41.53 | a | ||||||||||
1970 | 31.56 | d | 33.50 | 34.39 | 31.83 | 41.65 | 47.90 | 56.48 | 57.61 | 45.97 | 37.81 | 33.47 | 22.39 | 39.55 | ||||||||||||
1971 | 20.71 | 16.89 | ----- | z | ----- | z | 35.13 | 42.40 | 55.94 | 55.35 | 46.37 | 35.03 | 25.97 | a | 20.53 | a | 35.43 | b | ||||||||
1972 | 18.13 | a | 18.52 | b | 32.45 | 33.10 | 36.94 | ----- | z | 56.23 | 53.45 | 48.80 | 42.06 | 32.47 | ----- | z | 37.21 | b | ||||||||
1973 | ----- | z | 31.54 | 30.87 | 32.77 | 39.77 | 47.69 | a | 51.13 | a | 49.93 | a | 41.93 | 38.67 | a | 33.77 | 31.52 | 39.05 | a | |||||||
1974 | ----- | z | 29.04 | 33.84 | 33.87 | 40.06 | 45.68 | b | ----- | z | 48.19 | 51.97 | 41.55 | 35.27 | 28.97 | a | 38.84 | b | ||||||||
1975 | 30.00 | 29.39 | 31.58 | 33.53 | 38.10 | 43.57 | 51.87 | 47.33 | a | 49.30 | 37.06 | 30.34 | a | 30.68 | 37.73 | |||||||||||
1976 | ----- | z | ----- | z | 33.12 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | 31.79 | 25.39 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 28.59 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.03 | 32.22 | 34.24 | 37.28 | 41.26 | 46.30 | 54.36 | 53.99 | 48.88 | 41.75 | 35.62 | 32.13 | 41.19 | |||||||||||||
S.D. | 3.73 | 4.37 | 3.21 | 3.02 | 2.46 | 2.72 | 3.65 | 3.23 | 3.09 | 3.14 | 3.08 | 3.62 | 1.94 | |||||||||||||
SKEW | -0.87 | -0.82 | 0.18 | -0.06 | 0.01 | 0.49 | -0.30 | -0.43 | -0.35 | 0.29 | -0.29 | -0.33 | 0.07 | |||||||||||||
MAX | 37.32 | 41.79 | 41.71 | 45.13 | 47.13 | 55.63 | 61.61 | 60.97 | 55.00 | 50.00 | 41.47 | 43.61 | 45.44 | |||||||||||||
MIN | 18.13 | 16.89 | 25.39 | 29.46 | 35.13 | 39.87 | 44.65 | 45.65 | 41.27 | 35.03 | 25.97 | 20.53 | 37.64 | |||||||||||||
YRS | 67 | 69 | 68 | 68 | 68 | 67 | 67 | 69 | 69 | 70 | 68 | 68 | 52 |