YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1917 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 41.87 | 56.68 | b | 52.84 | 51.21 | g | ----- | z | ----- | z | ----- | z | ----- | z | 50.46 | i | ||
1940 | ----- | z | ----- | z | ----- | z | ----- | z | 42.84 | 49.00 | 53.87 | 51.58 | 48.23 | 37.55 | 27.83 | 28.23 | 42.39 | d | ||||||||
1941 | 24.81 | 27.00 | 28.16 | 33.57 | 44.55 | 47.13 | 52.39 | 51.77 | 47.90 | 38.97 | 28.97 | 24.65 | 37.49 | |||||||||||||
1942 | 22.94 | 21.57 | 24.97 | 33.27 | 39.45 | 48.43 | 51.16 | 51.97 | 45.20 | 37.03 | 29.67 | 26.71 | 36.03 | |||||||||||||
1943 | 24.71 | 24.06 | l | 27.00 | 34.63 | 41.48 | 49.17 | 52.32 | 52.48 | 44.80 | 32.94 | 24.37 | 20.26 | 36.74 | a | |||||||||||
1944 | 19.29 | 22.72 | 23.26 | 31.03 | 39.06 | 48.10 | 52.84 | 52.10 | 45.73 | 37.39 | 27.30 | 20.58 | 34.95 | |||||||||||||
1945 | 21.29 | 23.68 | 27.39 | 31.27 | 40.87 | 43.83 | 50.55 | 51.87 | 44.30 | 35.74 | 27.47 | 20.90 | 34.93 | |||||||||||||
1946 | 19.13 | 20.39 | 27.29 | 34.93 | 36.94 | 47.53 | 49.84 | 50.94 | 47.80 | 35.48 | 24.67 | 22.71 | 34.80 | |||||||||||||
1947 | 17.94 | 19.50 | 24.54 | c | 29.43 | 39.61 | 45.57 | 51.42 | 52.71 | 45.13 | 36.85 | d | 24.17 | 18.42 | 33.77 | |||||||||||
1948 | 18.27 | a | 22.93 | a | 23.71 | 36.72 | a | 41.60 | a | 49.87 | 51.55 | 51.29 | 44.57 | 35.30 | a | 21.00 | 26.52 | 35.28 | ||||||||
1949 | 15.42 | 23.19 | b | 27.52 | h | 31.63 | 39.26 | 48.40 | 52.06 | 49.68 | 46.93 | 34.39 | 29.13 | 20.32 | 35.49 | a | ||||||||||
1950 | 26.94 | 25.71 | 29.16 | 34.17 | 39.58 | 49.70 | 53.94 | 48.83 | b | 45.13 | 41.42 | 27.30 | 23.71 | 37.13 | ||||||||||||
1951 | 20.39 | 21.50 | 25.35 | 29.63 | 39.06 | 47.67 | 56.68 | 55.00 | 48.53 | 39.74 | 27.80 | 25.19 | 36.38 | |||||||||||||
1952 | 28.61 | 24.03 | 25.61 | 33.10 | 42.13 | 52.27 | 53.19 | 55.52 | 46.33 | 37.29 | 24.97 | 22.70 | a | 37.15 | ||||||||||||
1953 | 26.90 | 20.86 | 31.55 | 35.30 | 40.06 | 51.90 | 55.81 | 52.65 | 46.07 | 37.06 | 29.87 | 19.58 | 37.30 | |||||||||||||
1954 | 25.87 | 27.18 | 28.45 | 38.03 | 42.61 | 49.73 | 54.58 | 53.48 | 49.67 | 41.16 | 28.37 | 23.58 | 38.56 | |||||||||||||
1955 | 21.26 | 20.14 | 29.59 | d | 33.37 | 40.87 | 48.17 | 53.13 | 52.45 | 48.43 | 38.90 | 28.83 | 25.37 | a | 36.71 | |||||||||||
1956 | 26.45 | 21.31 | 29.57 | c | 29.92 | e | 42.62 | g | 51.93 | c | 53.53 | a | 51.63 | d | 47.42 | f | 40.16 | f | 24.58 | d | 23.83 | h | 36.11 | d | ||
1957 | 24.93 | c | 32.37 | a | 28.77 | 32.37 | 38.93 | a | 50.24 | a | 55.46 | c | 53.35 | e | 44.71 | b | 37.56 | o | 24.44 | c | 26.87 | h | 38.56 | b | ||
1958 | 20.81 | 27.29 | 25.35 | 33.76 | a | 42.55 | 52.79 | a | 55.65 | 53.84 | 48.71 | b | 37.97 | 27.70 | j | 24.58 | 38.48 | a | ||||||||
1959 | 20.48 | 24.75 | 23.10 | 36.10 | 42.97 | b | 51.20 | 52.68 | 53.74 | 46.33 | 37.06 | 26.04 | c | 26.35 | 36.73 | |||||||||||
1960 | 19.77 | 18.00 | a | 27.61 | 34.40 | 41.32 | 52.43 | 53.35 | 52.52 | 47.10 | 37.03 | 28.17 | 18.97 | 35.89 | ||||||||||||
1961 | 18.84 | 23.07 | 27.32 | 35.33 | 43.90 | 50.30 | 51.61 | 52.84 | 45.64 | b | 34.81 | 25.44 | c | 25.55 | 36.22 | |||||||||||
1962 | 20.32 | 28.39 | 25.52 | 35.57 | 41.84 | 44.70 | 54.81 | 52.29 | 49.10 | 39.55 | 31.67 | 27.23 | 37.58 | |||||||||||||
1963 | 15.87 | 24.36 | 25.84 | 39.53 | 44.26 | 47.97 | 54.26 | 52.87 | 49.23 | 39.16 | 29.57 | 17.94 | 36.74 | |||||||||||||
1964 | 16.65 | 18.52 | 26.48 | 33.47 | 44.23 | 49.30 | 54.23 | 53.77 | 49.30 | 39.00 | 29.90 | 21.97 | 36.40 | |||||||||||||
1965 | 24.52 | 19.93 | 23.90 | 34.80 | 42.90 | 47.97 | 53.48 | 51.32 | 46.23 | 37.10 | 31.93 | 25.59 | d | 36.64 | ||||||||||||
1966 | 17.16 | 17.68 | 28.65 | 35.93 | 43.35 | 49.20 | 52.77 | 51.77 | 46.40 | 35.19 | 29.43 | 21.26 | 35.73 | |||||||||||||
1967 | 19.06 | 25.25 | 29.81 | 36.17 | 39.90 | 48.63 | 52.23 | 51.29 | 44.87 | 35.65 | 30.40 | 20.55 | 36.15 | |||||||||||||
1968 | 23.61 | 25.83 | 28.74 | 29.30 | 39.35 | 43.30 | 49.55 | 48.19 | 38.07 | 33.55 | 24.37 | 19.39 | 33.60 | |||||||||||||
1969 | 28.35 | 23.07 | 20.94 | 33.67 | 39.13 | 46.90 | 54.81 | 50.71 | 45.17 | 37.32 | 24.53 | 22.07 | b | 35.56 | ||||||||||||
1970 | 12.65 | 22.39 | 23.39 | 30.03 | 38.55 | 45.00 | 51.97 | 49.16 | 43.23 | 31.58 | 24.20 | 22.48 | 32.89 | |||||||||||||
1971 | 18.42 | 22.39 | 26.65 | 31.33 | 41.26 | 49.17 | 53.61 | 50.94 | 44.67 | 36.77 | 27.97 | 23.90 | 35.59 | |||||||||||||
1972 | 23.42 | 23.24 | 30.87 | 33.17 | 40.32 | 50.67 | 53.94 | 52.45 | 48.23 | 39.58 | 23.13 | 22.81 | 36.82 | |||||||||||||
1973 | 20.74 | 21.96 | 26.87 | 30.20 | 41.42 | 46.50 | ----- | z | 49.19 | 47.27 | 34.61 | 31.47 | 20.68 | 33.72 | a | |||||||||||
1974 | 22.10 | 20.64 | 30.39 | 34.13 | 46.45 | 49.67 | 54.58 | 52.68 | 46.53 | 39.74 | 27.52 | a | 18.68 | 36.93 | ||||||||||||
1975 | 21.26 | 23.00 | 27.35 | 31.77 | 37.42 | 47.47 | 52.39 | 51.42 | 44.60 | 36.94 | 26.37 | 22.87 | 35.24 | |||||||||||||
1976 | 20.90 | 28.24 | 27.48 | 33.33 | 40.74 | 47.67 | 51.90 | 50.77 | ----- | z | ----- | z | ----- | z | ----- | z | 37.63 | d | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.39 | 23.20 | 26.88 | 33.45 | 41.15 | 48.85 | 53.11 | 51.92 | 46.29 | 37.05 | 27.22 | 22.71 | 36.04 | |||||||||||||
S.D. | 3.80 | 3.21 | 2.47 | 2.47 | 2.12 | 2.64 | 1.63 | 1.60 | 2.23 | 2.27 | 2.67 | 2.80 | 1.27 | |||||||||||||
SKEW | 0.03 | 0.61 | -0.26 | 0.16 | 0.27 | 0.33 | -0.04 | -0.24 | -1.21 | -0.23 | -0.17 | 0.12 | -0.60 | |||||||||||||
MAX | 28.61 | 32.37 | 31.55 | 39.53 | 46.45 | 56.68 | 56.68 | 55.52 | 49.67 | 41.42 | 31.93 | 28.23 | 38.56 | |||||||||||||
MIN | 12.65 | 17.68 | 20.94 | 29.30 | 36.94 | 43.30 | 49.55 | 48.19 | 38.07 | 31.58 | 21.00 | 17.94 | 32.89 | |||||||||||||
YRS | 36 | 35 | 35 | 36 | 37 | 38 | 37 | 37 | 35 | 34 | 35 | 34 | 29 |