YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1893 | 32.19 | 38.96 | 40.35 | 43.97 | 54.35 | 62.90 | 74.29 | 73.77 | 62.27 | 48.17 | a | 37.87 | 35.03 | 50.34 | ||||||||||||
1894 | 30.48 | 33.25 | 38.84 | 46.03 | 54.00 | 58.90 | 73.77 | 71.23 | 59.77 | 46.32 | 34.97 | 38.32 | 48.82 | |||||||||||||
1895 | 33.87 | 31.18 | 35.77 | 39.23 | 50.03 | 61.37 | 70.00 | 68.94 | 63.50 | 50.94 | 38.77 | 29.58 | 47.76 | |||||||||||||
1896 | 31.68 | 34.31 | 41.45 | 43.07 | 53.16 | 62.47 | 70.77 | 68.74 | 63.30 | 53.23 | 39.20 | 32.77 | 49.51 | |||||||||||||
1897 | 34.87 | a | 33.36 | 36.03 | 45.37 | 54.16 | 58.80 | 65.29 | 68.90 | 70.37 | 50.97 | 38.17 | 29.00 | 48.77 | ||||||||||||
1898 | 32.06 | 36.14 | 37.10 | 48.87 | 49.32 | 58.60 | 71.90 | 69.55 | 61.33 | 45.61 | 36.93 | 30.57 | a | 48.17 | ||||||||||||
1899 | 31.32 | 32.50 | 38.03 | 46.33 | 47.19 | 60.73 | 71.42 | 66.94 | 59.97 | 46.74 | 36.53 | 30.06 | 47.31 | |||||||||||||
1900 | 34.03 | 35.04 | 44.84 | 45.40 | 51.81 | 57.67 | 67.39 | 61.19 | 57.30 | 47.00 | 37.63 | 27.39 | 47.22 | |||||||||||||
1901 | 33.13 | 36.44 | a | 36.57 | a | 41.77 | 50.93 | a | 55.37 | 69.84 | 70.23 | 58.77 | 49.71 | 40.43 | 26.87 | 47.50 | ||||||||||
1902 | 30.81 | 32.96 | 35.16 | 45.13 | 50.48 | 59.97 | a | 64.29 | 67.97 | 62.30 | 47.23 | a | 36.61 | b | 31.10 | 47.00 | ||||||||||
1903 | 29.34 | b | 29.82 | 37.03 | 44.47 | 51.13 | 58.37 | 68.00 | 70.06 | 59.83 | 44.19 | 35.13 | 29.73 | a | 46.43 | |||||||||||
1904 | 24.26 | 35.69 | 42.58 | 41.72 | a | 52.29 | 60.79 | a | 69.29 | 70.61 | 59.34 | a | 47.77 | 34.67 | 33.61 | 47.72 | ||||||||||
1905 | 36.65 | 42.68 | 45.81 | 46.80 | 48.77 | 59.70 | 65.55 | 69.58 | 62.33 | 50.26 | 42.59 | a | 31.43 | a | 50.18 | |||||||||||
1906 | 29.58 | 39.18 | 41.77 | a | 44.67 | 50.94 | 59.43 | 69.42 | 67.35 | 58.59 | a | 45.48 | 37.76 | a | 37.16 | 48.44 | ||||||||||
1907 | 37.19 | 38.82 | 41.65 | 44.87 | 47.77 | 55.50 | 70.10 | a | 69.74 | 60.70 | 52.45 | 40.40 | 29.55 | 49.06 | ||||||||||||
1908 | 34.00 | 37.15 | b | 40.48 | 44.37 | 49.53 | a | 56.43 | 68.50 | a | 68.52 | 59.93 | 43.14 | b | 41.00 | e | 36.06 | 48.26 | ||||||||
1909 | 36.19 | 35.52 | a | 36.68 | 43.24 | a | 47.57 | a | 60.03 | 70.39 | 70.57 | a | 60.73 | 47.10 | a | ----- | z | ----- | z | 50.80 | b | |||||
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.61 | 40.83 | 33.10 | 40.85 | i | |||
1911 | 37.06 | 38.04 | a | 46.06 | 45.87 | 48.32 | 62.97 | 69.32 | 67.48 | 65.13 | 49.53 | a | 35.75 | b | 25.97 | 49.29 | ||||||||||
1912 | 28.70 | a | 29.79 | 42.86 | b | 41.37 | 50.23 | 62.97 | 65.16 | 67.58 | 56.90 | 48.35 | 36.10 | a | 28.70 | a | 46.56 | |||||||||
1913 | 28.17 | a | 34.96 | b | 38.19 | 46.07 | a | 50.35 | 57.03 | 66.10 | a | 65.19 | 55.73 | ----- | z | 44.85 | d | 32.45 | 47.19 | a | ||||||
1914 | 37.00 | 33.89 | 40.39 | 46.67 | 50.48 | b | 63.57 | 69.48 | 68.97 | 63.47 | 50.93 | a | 44.86 | b | 34.36 | c | 50.34 | |||||||||
1915 | 32.23 | 37.82 | 39.87 | 46.17 | 49.00 | 60.93 | 68.90 | 67.13 | 58.23 | 45.87 | 37.03 | 31.26 | 47.87 | |||||||||||||
1916 | 36.68 | c | 38.43 | a | 44.42 | 45.10 | 48.29 | 57.97 | 68.90 | 67.84 | 60.93 | 48.13 | 31.83 | 25.34 | b | 47.82 | ||||||||||
1917 | 34.59 | b | 33.75 | 33.94 | 44.03 | 49.26 | 60.57 | 71.65 | 67.58 | 64.47 | 49.42 | 37.53 | 31.13 | 48.16 | ||||||||||||
1918 | 29.84 | 36.14 | 45.20 | a | 44.80 | 50.26 | 66.47 | 69.87 | 65.67 | a | 61.77 | 50.39 | 38.38 | a | 31.61 | 49.20 | ||||||||||
1919 | 27.00 | 33.18 | 38.55 | 46.73 | 52.07 | c | 60.83 | 70.84 | 68.06 | 64.13 | 48.77 | 39.23 | 35.48 | b | 48.74 | |||||||||||
1920 | 37.45 | 43.14 | 41.58 | 42.80 | 52.77 | 62.93 | 69.26 | 68.29 | 59.83 | 45.30 | a | 36.83 | 30.29 | 49.21 | ||||||||||||
1921 | 35.71 | 38.14 | 47.45 | 44.63 | 51.93 | a | 61.55 | a | 70.20 | a | 69.81 | 65.10 | 53.59 | b | 38.86 | b | 38.35 | 51.28 | ||||||||
1922 | 31.23 | 35.63 | a | 37.97 | 42.30 | 54.32 | 64.14 | b | 72.14 | b | 70.90 | 64.10 | 49.94 | 34.57 | 49.26 | h | 50.66 | a | ||||||||
1923 | 33.36 | c | 36.75 | 38.10 | 45.73 | 53.55 | 57.40 | 70.77 | 68.61 | 59.70 | 43.81 | 42.10 | 36.07 | b | 48.83 | |||||||||||
1924 | 28.39 | 34.41 | 39.13 | a | 42.10 | 53.84 | 62.47 | 71.37 | a | 68.84 | 73.37 | 49.71 | 38.50 | 31.26 | 49.45 | |||||||||||
1925 | 26.81 | 33.71 | 39.10 | 44.30 | 54.67 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.98 | h | ||||
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | 45.57 | w | 48.55 | 56.20 | 70.74 | 67.35 | 54.90 | 47.00 | 35.50 | 30.97 | 51.40 | d | ||||||||
1952 | 31.16 | 28.71 | a | 33.13 | 43.07 | 50.45 | 56.77 | 63.81 | 66.29 | 59.86 | a | 44.61 | 31.47 | 27.55 | 44.74 | |||||||||||
1953 | 29.33 | a | 27.82 | 36.90 | 40.90 | 43.52 | 57.27 | 75.31 | e | 67.60 | k | 55.70 | 48.64 | f | 36.17 | 23.77 | 42.67 | b | ||||||||
1954 | 28.52 | 33.32 | 39.55 | 46.77 | 50.87 | a | 58.07 | 70.77 | 66.13 | 61.63 | 48.58 | 34.43 | 28.55 | 47.27 | ||||||||||||
1955 | 29.23 | 26.37 | a | 35.30 | a | 37.92 | d | 47.50 | c | ----- | z | 63.58 | 68.65 | 55.54 | d | 48.35 | 33.03 | 32.13 | 43.42 | a | ||||||
1956 | 31.94 | 29.79 | 33.61 | 42.67 | 50.81 | 64.10 | 68.52 | 64.68 | 60.57 | 49.82 | t | 28.10 | 26.94 | 45.61 | a | |||||||||||
1957 | 40.86 | c | 43.35 | b | 41.39 | 43.66 | a | 50.36 | c | 62.68 | b | 70.53 | a | 67.65 | 55.60 | 47.33 | g | 31.10 | 30.71 | c | 48.90 | a | ||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 29.42 | 31.35 | b | 36.00 | e | 48.75 | b | 51.35 | 66.72 | a | 72.55 | 68.62 | e | 57.24 | a | 45.87 | 34.63 | c | 32.97 | b | 47.96 | |||||
1960 | 28.06 | 29.07 | 39.29 | 43.45 | a | 50.48 | 63.69 | a | 69.24 | b | 70.10 | a | 62.07 | b | 48.32 | 32.57 | g | 27.13 | a | 48.26 | a | |||||
1961 | 32.00 | c | 33.00 | c | 38.79 | l | 44.00 | r | 49.97 | 62.14 | h | 68.90 | u | 65.53 | p | 61.08 | f | 44.61 | 37.00 | b | 33.94 | 38.42 | f | |||
1962 | 31.06 | 36.52 | c | 30.62 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 33.79 | j | |
1963 | ----- | z | 36.73 | f | 37.16 | 40.57 | 51.13 | 56.03 | 71.97 | 67.94 | 61.50 | 49.16 | 38.27 | 25.74 | 49.95 | b | ||||||||||
1964 | 21.58 | 23.41 | 34.13 | a | 40.93 | 47.52 | 56.83 | 69.00 | 67.00 | 58.90 | 47.81 | 32.00 | 30.55 | 44.14 | ||||||||||||
1965 | 33.65 | 32.39 | 36.32 | 43.70 | 47.37 | a | 54.83 | 70.03 | 67.80 | a | 56.77 | 44.35 | 39.50 | 34.97 | 46.81 | |||||||||||
1966 | 28.48 | 29.74 | a | 35.80 | a | 41.43 | 51.90 | 58.27 | 68.13 | a | 66.32 | 59.43 | 43.06 | 34.20 | 25.73 | a | 45.21 | |||||||||
1967 | 21.61 | 28.46 | 36.97 | 36.93 | 45.81 | 56.47 | 69.13 | 64.35 | 59.07 | 44.26 | 34.78 | c | 27.90 | b | 43.81 | |||||||||||
1968 | 28.53 | a | 37.03 | 35.71 | 38.13 | 46.97 | 57.07 | 65.26 | 62.23 | 53.80 | 44.33 | a | 34.07 | a | 22.90 | 43.84 | ||||||||||
1969 | 33.03 | 29.89 | 30.84 | 40.17 | a | 50.23 | 56.83 | 70.50 | a | 69.31 | b | 61.47 | 42.84 | 37.17 | 29.39 | 45.97 | ||||||||||
1970 | 24.16 | 32.50 | 35.73 | a | 35.63 | 49.87 | 58.60 | 70.60 | a | 69.33 | a | 59.17 | 41.77 | 32.80 | 29.29 | 44.96 | ||||||||||
1971 | 24.65 | 28.71 | 34.35 | 41.17 | a | 46.97 | 58.83 | 72.17 | a | 68.35 | 59.73 | 45.23 | a | 34.20 | 28.61 | 45.25 | ||||||||||
1972 | 24.35 | 28.46 | a | 39.87 | a | 39.00 | 48.10 | 62.20 | 70.23 | a | 67.26 | 59.53 | 52.39 | 33.03 | a | 28.67 | a | 46.09 | ||||||||
1973 | 27.58 | 34.18 | 35.33 | a | 39.00 | a | 52.06 | 58.53 | 67.48 | 66.87 | a | ----- | z | 45.00 | 34.23 | 26.71 | 44.27 | a | ||||||||
1974 | 31.42 | 27.04 | 38.58 | 39.73 | 50.00 | b | 63.27 | 69.18 | c | 65.55 | 60.90 | 51.45 | 35.77 | 26.32 | 46.60 | |||||||||||
1975 | 28.35 | 30.00 | a | 36.29 | 37.60 | 45.23 | 56.40 | 69.06 | 65.77 | 61.80 | 43.58 | 33.00 | 29.19 | 44.69 | ||||||||||||
1976 | 26.87 | ----- | z | ----- | z | 41.67 | 52.13 | 58.67 | 69.19 | 65.52 | 60.90 | 46.84 | 35.07 | 26.26 | 48.31 | b | ||||||||||
1977 | 34.03 | 32.14 | 33.00 | 43.30 | 48.42 | 60.03 | 71.10 | 70.61 | 63.57 | 52.00 | 36.90 | 33.94 | 48.25 | |||||||||||||
1978 | 36.16 | 35.82 | 41.35 | 40.53 | 48.42 | 58.57 | 68.19 | 66.00 | 59.70 | 50.90 | 40.97 | a | 29.61 | 48.02 | ||||||||||||
1979 | 31.97 | 31.86 | 35.55 | 38.00 | 48.30 | a | ----- | z | 71.05 | l | 63.70 | a | 61.80 | 44.39 | 29.30 | 28.03 | 41.29 | b | ||||||||
1980 | 32.32 | 34.86 | 35.32 | 37.83 | 42.19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 36.51 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 31.12 | 33.73 | 38.43 | 42.87 | 49.91 | 59.74 | 69.47 | 67.84 | 60.61 | 47.55 | 36.54 | 30.39 | 47.56 | |||||||||||||
S.D. | 4.09 | 4.15 | 3.63 | 3.08 | 2.55 | 2.90 | 2.46 | 2.25 | 3.43 | 2.96 | 3.46 | 3.56 | 1.84 | |||||||||||||
SKEW | -0.18 | 0.09 | 0.51 | -0.33 | -0.52 | 0.42 | -0.43 | -0.47 | 1.01 | 0.11 | 0.12 | 0.29 | -0.35 | |||||||||||||
MAX | 40.86 | 43.35 | 47.45 | 48.87 | 54.35 | 66.72 | 75.31 | 73.77 | 73.37 | 53.59 | 44.86 | 38.35 | 51.28 | |||||||||||||
MIN | 21.58 | 23.41 | 30.84 | 35.63 | 42.19 | 54.83 | 63.58 | 61.19 | 53.80 | 41.77 | 28.10 | 22.90 | 43.81 | |||||||||||||
YRS | 59 | 58 | 57 | 58 | 59 | 55 | 56 | 56 | 56 | 55 | 57 | 57 | 44 |