YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1911 | ----- | z | ----- | z | ----- | z | 28.17 | g | 33.45 | 42.27 | 47.26 | 43.42 | 38.10 | 29.61 | 26.96 | b | 20.63 | a | 35.21 | d | ||||||
1912 | 22.03 | a | 27.39 | a | 22.86 | b | 29.72 | a | 39.13 | p | 42.57 | 45.48 | 44.16 | 35.00 | 28.23 | 37.00 | d | 32.14 | b | 33.33 | a | |||||
1913 | 31.57 | c | 30.00 | a | 37.79 | g | 43.61 | l | ----- | z | ----- | z | ----- | z | 45.21 | g | 37.43 | 30.65 | 32.03 | 16.74 | 29.74 | f | ||||
1914 | 29.71 | 25.57 | 26.06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 27.63 | 15.63 | a | 24.92 | g | ||||
1915 | 20.58 | 27.93 | ----- | z | 30.32 | b | 34.77 | 38.20 | 44.06 | 47.35 | 35.83 | 31.19 | 26.43 | 23.52 | 32.75 | a | ||||||||||
1916 | 6.35 | 24.45 | 26.35 | 28.73 | 31.29 | 39.40 | 41.61 | 43.10 | 35.37 | 25.61 | 18.60 | 16.90 | 28.15 | |||||||||||||
1917 | 16.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 16.61 | k | |
1918 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1919 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 47.23 | 41.57 | 31.48 | 25.83 | 22.06 | 33.63 | g | |||||
1931 | 26.68 | 25.07 | 29.10 | 32.07 | 39.19 | 44.17 | 48.68 | 45.68 | 40.07 | 33.55 | 25.33 | 24.00 | 34.46 | |||||||||||||
1932 | 23.83 | a | 24.52 | 32.23 | 32.63 | 37.61 | 43.73 | 44.47 | a | 45.13 | a | 38.43 | 35.03 | 33.23 | 17.29 | 34.01 | ||||||||||
1933 | 24.10 | 21.63 | a | 28.03 | 29.87 | 33.45 | 45.20 | 48.55 | 46.81 | 38.17 | 36.29 | 28.10 | 33.55 | 34.48 | ||||||||||||
1934 | 29.71 | 29.14 | 33.23 | 37.90 | 41.71 | 42.53 | 46.87 | 48.32 | 39.57 | 39.26 | 35.47 | 27.06 | 37.56 | |||||||||||||
1935 | 24.29 | 27.11 | 25.24 | b | 30.67 | 34.06 | 43.07 | 47.06 | 45.77 | 42.20 | 32.55 | 23.90 | 22.10 | 33.17 | ||||||||||||
1936 | 26.58 | 17.76 | 27.03 | 35.27 | 40.42 | 45.73 | 48.13 | a | 46.35 | 39.37 | 34.23 | 23.03 | 27.13 | 34.25 | ||||||||||||
1937 | 6.45 | 25.75 | 31.74 | 31.67 | 37.35 | 45.27 | 48.90 | 44.39 | 41.10 | 37.42 | 33.03 | 29.13 | 34.35 | |||||||||||||
1938 | 26.58 | 25.00 | 28.74 | 33.10 | 36.87 | 44.13 | 49.19 | 41.32 | 43.23 | 33.32 | 22.53 | 23.45 | 33.96 | |||||||||||||
1939 | 24.42 | 20.43 | 27.68 | 31.33 | 37.53 | a | 39.44 | c | 50.44 | f | 46.14 | b | 41.40 | 34.16 | 27.53 | 30.73 | a | 32.80 | a | |||||||
1940 | ----- | z | 30.07 | 30.94 | 32.93 | 38.10 | 41.60 | 47.42 | 44.06 | 42.83 | 35.13 | 25.47 | 23.39 | 35.63 | a | |||||||||||
1941 | 24.52 | 26.68 | 25.23 | 30.50 | 37.03 | 40.77 | 47.16 | 47.23 | 36.83 | 33.39 | 31.10 | a | 25.84 | 33.86 | ||||||||||||
1942 | 12.87 | 25.14 | 25.23 | 31.70 | 35.77 | 39.20 | 47.48 | 46.87 | 40.29 | b | 34.48 | 29.21 | a | 28.84 | 33.09 | |||||||||||
1943 | 17.90 | 26.25 | 26.58 | 34.17 | 34.52 | 40.43 | 46.52 | 44.17 | b | 41.90 | 36.35 | 29.07 | 23.73 | a | 33.47 | |||||||||||
1944 | 20.43 | a | 24.83 | 25.32 | 29.73 | 35.43 | a | 41.23 | 46.81 | 42.68 | 42.63 | 37.69 | b | 28.70 | 22.13 | 33.13 | ||||||||||
1945 | 25.77 | 27.21 | 27.23 | 29.87 | 39.55 | 39.87 | 46.84 | 46.90 | 38.57 | 34.10 | 31.30 | 25.61 | 34.40 | |||||||||||||
1946 | 26.13 | 26.25 | 28.90 | 31.43 | 37.16 | 42.07 | 46.55 | 45.13 | 37.50 | 29.65 | 25.47 | 26.03 | 33.52 | |||||||||||||
1947 | 18.71 | 28.07 | 29.23 | 32.17 | 39.42 | 41.80 | 46.45 | 42.35 | 40.83 | 38.39 | 29.83 | 28.00 | 34.60 | |||||||||||||
1948 | 23.00 | 22.63 | b | 26.35 | 29.77 | 35.58 | 45.13 | 43.61 | 43.68 | 38.20 | 31.35 | 26.60 | 18.60 | a | 32.04 | |||||||||||
1949 | 6.26 | 23.68 | 28.45 | 31.43 | 39.58 | 39.53 | 44.32 | 42.77 | 39.80 | 27.90 | 30.80 | 24.65 | 31.60 | |||||||||||||
1950 | 10.74 | 25.11 | 26.65 | 29.03 | 33.48 | 43.30 | 45.29 | 45.29 | 40.10 | 37.00 | 31.70 | 31.19 | 33.24 | |||||||||||||
1951 | 21.13 | 27.32 | 23.45 | 27.93 | 35.55 | ----- | z | ----- | z | ----- | z | 38.69 | a | 33.26 | 26.87 | 19.55 | 28.19 | c | ||||||||
1952 | 18.65 | 25.72 | 26.71 | 30.37 | 35.35 | 41.10 | 45.87 | a | 42.93 | a | 39.33 | 32.48 | 16.33 | 21.94 | 31.40 | |||||||||||
1953 | 30.97 | 24.79 | 26.48 | 28.93 | 34.52 | 38.10 | 43.10 | 44.65 | 39.67 | 31.10 | 31.90 | 26.35 | 33.38 | |||||||||||||
1954 | 22.68 | 27.68 | 22.74 | 31.10 | 36.23 | 40.33 | 43.42 | 41.94 | 37.40 | 29.32 | 30.47 | 20.61 | 31.99 | |||||||||||||
1955 | 20.55 | 20.39 | 22.23 | 28.17 | 33.29 | 41.17 | 43.71 | 40.19 | 38.40 | 33.23 | a | 24.33 | 23.65 | 30.78 | ||||||||||||
1956 | 24.77 | 20.31 | 26.94 | 30.07 | 39.73 | a | 39.47 | 46.61 | 43.00 | a | 37.77 | 31.84 | 23.60 | 24.16 | 32.36 | |||||||||||
1957 | 8.32 | 25.21 | 30.52 | 31.33 | 39.74 | 42.73 | 43.48 | 40.58 | 40.90 | 34.03 | 23.77 | 27.74 | 32.36 | |||||||||||||
1958 | 26.06 | 33.29 | 24.87 | 29.77 | 40.06 | 45.47 | 47.48 | 46.81 | 38.40 | 30.52 | 28.87 | 30.52 | 35.18 | |||||||||||||
1959 | 26.58 | 24.71 | 27.19 | 29.50 | 33.16 | 43.50 | 46.42 | 42.19 | 41.00 | a | 34.13 | 24.33 | 22.13 | 32.90 | ||||||||||||
1960 | 18.61 | 23.52 | 28.29 | 32.37 | 34.71 | 41.77 | 47.81 | 43.90 | 39.30 | 34.55 | 27.66 | a | 23.94 | 33.03 | ||||||||||||
1961 | 24.04 | g | 30.86 | 30.00 | 31.27 | 36.19 | 44.63 | 46.77 | 50.42 | 34.79 | a | 32.13 | a | ----- | z | 24.15 | e | 36.12 | b | |||||||
1962 | 19.03 | 26.32 | 26.52 | 32.10 | 35.23 | 38.10 | 42.39 | 44.65 | 40.30 | 33.87 | 31.73 | 26.94 | 33.10 | |||||||||||||
1963 | 12.39 | c | 32.36 | 26.81 | 30.10 | 36.77 | 40.57 | 40.07 | d | 41.00 | 42.32 | h | 37.18 | i | 30.63 | k | 24.23 | e | 31.59 | c | ||||||
1964 | 25.43 | a | 21.21 | a | 23.71 | 26.81 | c | 30.93 | a | 41.53 | 45.58 | 43.31 | b | 35.64 | b | 32.07 | b | 28.17 | a | 24.03 | a | 31.54 | ||||
1965 | 26.68 | 26.46 | 21.87 | 30.90 | 32.10 | 41.17 | 46.00 | a | 45.67 | a | 35.07 | a | 36.15 | e | 31.20 | 22.97 | 33.02 | |||||||||
1966 | 26.23 | 23.72 | c | 25.07 | b | 28.50 | 35.32 | 41.17 | 43.45 | 44.13 | 42.79 | a | 35.00 | c | 31.80 | 29.11 | d | 33.86 | ||||||||
1967 | 29.26 | d | 26.96 | c | 27.24 | b | 28.04 | b | 33.97 | 41.28 | a | 45.39 | 48.13 | a | 42.50 | 35.61 | 28.41 | a | 18.93 | c | 33.81 | |||||
1968 | 22.87 | a | 29.50 | a | 26.39 | 27.10 | 35.80 | a | 42.17 | 45.84 | 46.63 | a | 40.04 | c | 31.33 | d | 30.62 | a | 22.18 | c | 33.37 | |||||
1969 | 15.87 | a | 22.85 | b | 25.39 | 28.67 | c | 39.55 | 48.03 | 45.28 | b | 42.90 | 41.81 | c | 29.71 | 28.17 | 25.42 | 32.80 | ||||||||
1970 | 24.90 | 26.21 | 26.47 | a | 26.43 | 35.35 | 45.27 | h | 48.00 | 44.97 | 35.34 | a | 30.39 | 29.27 | 24.06 | 31.95 | a | |||||||||
1971 | 25.58 | 24.61 | 26.16 | 28.63 | 38.13 | 41.53 | 48.90 | 48.67 | d | 37.07 | 29.26 | 27.63 | 24.45 | 33.39 | ||||||||||||
1972 | 22.42 | 26.31 | 30.39 | 26.47 | 36.81 | 43.07 | 48.48 | 47.13 | 36.90 | 30.71 | 30.00 | 16.10 | 32.90 | |||||||||||||
1973 | 20.65 | 27.75 | 25.29 | 28.90 | a | 38.03 | 43.20 | 45.83 | a | 45.50 | a | 41.77 | 34.42 | 30.03 | 32.10 | 34.46 | ||||||||||
1974 | 18.52 | 27.32 | 28.41 | d | 31.37 | 34.77 | 45.50 | 47.14 | b | 47.40 | a | 40.03 | 32.20 | a | 30.74 | c | 25.83 | a | 34.10 | |||||||
1975 | 26.55 | 24.57 | 25.85 | d | 27.20 | 34.77 | 41.97 | a | 51.19 | 45.03 | b | 37.42 | d | 38.03 | a | 27.43 | 27.73 | a | 33.98 | |||||||
1976 | 26.55 | 24.83 | 26.48 | 29.79 | a | 35.58 | 39.13 | 47.88 | e | 47.83 | a | 42.79 | a | 32.23 | a | 32.45 | a | 23.00 | 34.05 | |||||||
1977 | 18.71 | 25.61 | 25.24 | b | 30.83 | a | 35.13 | 46.03 | 46.24 | f | ----- | z | 40.93 | 34.39 | 27.40 | 29.93 | b | 31.42 | b | |||||||
1978 | 28.71 | 30.64 | 32.00 | 31.83 | 34.26 | 43.83 | 48.44 | f | 47.27 | a | 40.80 | 31.79 | b | 22.00 | a | 17.62 | b | 32.80 | a | |||||||
1979 | 8.89 | c | 26.00 | 28.43 | c | 31.82 | b | 37.37 | a | 42.43 | 45.81 | j | 48.88 | e | 43.14 | b | 38.39 | c | 27.39 | b | 27.70 | a | 32.77 | a | ||
1980 | 20.10 | 28.90 | h | 27.10 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.10 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.55 | 25.83 | 27.03 | 30.43 | 36.19 | 42.15 | 46.14 | 45.04 | 39.38 | 33.15 | 28.12 | 24.41 | 33.30 | |||||||||||||
S.D. | 6.47 | 3.00 | 2.54 | 2.19 | 2.44 | 2.27 | 2.17 | 2.32 | 2.38 | 2.93 | 3.85 | 4.30 | 1.44 | |||||||||||||
SKEW | -0.89 | -0.05 | 0.33 | 0.65 | 0.14 | 0.27 | -0.48 | -0.04 | -0.23 | -0.04 | -0.54 | -0.07 | -0.67 | |||||||||||||
MAX | 31.57 | 33.29 | 33.23 | 37.90 | 41.71 | 48.03 | 51.19 | 50.42 | 43.23 | 39.26 | 37.00 | 33.55 | 37.56 | |||||||||||||
MIN | 6.26 | 17.76 | 21.87 | 26.43 | 30.93 | 38.10 | 40.07 | 40.19 | 34.79 | 25.61 | 16.33 | 15.63 | 28.15 | |||||||||||||
YRS | 54 | 54 | 52 | 52 | 52 | 51 | 48 | 52 | 54 | 54 | 54 | 56 | 41 |