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 | ----- | 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 | 67.23 | a | 63.27 | 58.88 | a | 48.13 | 46.47 | 40.92 | 54.15 | f | ||||
1943 | 38.34 | 40.75 | 43.50 | 50.02 | a | 57.06 | 62.37 | 67.48 | 65.80 | a | 62.32 | 51.52 | 44.13 | 36.82 | 51.68 | |||||||||||
1944 | 35.72 | a | 41.24 | d | 38.77 | 45.32 | 55.47 | 62.17 | a | 70.52 | 70.73 | 63.55 | 54.28 | b | 39.52 | ----- | z | 52.48 | a | |||||||
1945 | ----- | z | 45.16 | 41.19 | 51.32 | 54.69 | 60.55 | 68.87 | 67.69 | 62.82 | 56.23 | a | 46.48 | 34.48 | a | 53.59 | a | |||||||||
1946 | 32.13 | 36.44 | c | 48.98 | a | 53.37 | 54.40 | 61.38 | a | 67.63 | 67.34 | 61.87 | 47.84 | 38.70 | 41.82 | q | 51.82 | a | ||||||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.50 | g | 64.74 | f | 65.22 | 54.18 | 36.42 | 31.12 | r | 51.94 | i | |||
1948 | ----- | z | 34.79 | c | 36.17 | s | 49.97 | a | 56.52 | 63.70 | 72.79 | 73.52 | 73.54 | e | 54.94 | 41.55 | 36.92 | a | 55.82 | b | ||||||
1949 | 24.91 | c | ----- | z | ----- | z | ----- | z | 55.18 | l | 62.40 | 68.13 | 66.16 | 63.82 | 48.52 | 48.53 | 33.06 | 51.94 | d | |||||||
1950 | 32.16 | 39.80 | 41.10 | ----- | z | 55.54 | g | 62.05 | 65.55 | 63.50 | a | 61.22 | 58.42 | a | 47.20 | 42.47 | a | 51.35 | b | |||||||
1951 | 34.66 | 38.59 | a | 40.10 | 46.50 | 54.03 | 60.27 | 69.97 | 64.84 | 61.84 | h | 52.05 | 40.62 | 34.15 | 48.71 | a | ||||||||||
1952 | 33.65 | 35.12 | 33.18 | a | 46.25 | 56.60 | 62.58 | 66.94 | 66.92 | 64.02 | 57.35 | 38.10 | 33.18 | 49.49 | ||||||||||||
1953 | 39.15 | 35.48 | 40.87 | 45.43 | a | 48.71 | 62.40 | 68.03 | 63.84 | b | 61.85 | 50.82 | 43.85 | 32.52 | 49.41 | |||||||||||
1954 | 34.48 | 40.73 | 37.06 | 50.80 | 55.89 | 61.37 | 67.79 | 63.90 | 61.17 | 53.22 | f | 43.97 | 34.50 | 50.15 | a | |||||||||||
1955 | 27.35 | 29.88 | 38.45 | 42.71 | a | 51.84 | 59.65 | 63.19 | 64.08 | 64.50 | 56.68 | 42.39 | b | 38.31 | 48.25 | |||||||||||
1956 | 39.32 | 30.84 | 42.76 | 45.09 | a | 57.08 | g | 65.78 | 67.83 | b | 66.00 | f | 66.27 | 53.16 | b | 41.02 | 34.68 | 48.67 | b | |||||||
1957 | 33.40 | 41.46 | 41.08 | a | 44.84 | a | 48.97 | 63.86 | a | 68.29 | 65.29 | 61.92 | 49.13 | 38.07 | 38.61 | 49.58 | ||||||||||
1958 | 33.98 | 39.14 | 33.52 | 44.30 | 58.53 | 64.40 | 69.47 | 67.40 | 61.08 | 52.87 | 42.07 | 40.29 | 50.59 | |||||||||||||
1959 | 36.00 | 32.30 | 42.00 | a | 49.73 | 52.68 | 65.75 | 70.77 | 64.88 | a | 59.67 | 52.97 | a | 42.90 | 36.35 | 50.50 | ||||||||||
1960 | 29.39 | 31.47 | 44.69 | 48.57 | 54.66 | 67.25 | 69.81 | 67.97 | 63.68 | 49.92 | 41.67 | 33.21 | 50.19 | |||||||||||||
1961 | 37.10 | 38.48 | 39.47 | 48.07 | 54.32 | 67.25 | 69.98 | 66.92 | 59.02 | 50.69 | 39.23 | 33.97 | a | 50.37 | ||||||||||||
1962 | 32.88 | a | 36.46 | 34.58 | 51.88 | 52.35 | a | 61.58 | 67.63 | 68.81 | 62.75 | 52.15 | a | 45.25 | 38.00 | 50.36 | ||||||||||
1963 | 31.98 | 41.54 | a | 39.02 | a | 43.53 | 56.37 | 59.72 | 71.02 | 65.73 | a | 62.62 | 54.71 | 42.45 | 36.58 | 50.44 | ||||||||||
1964 | 30.81 | 31.77 | a | 35.50 | a | 43.38 | b | 52.48 | 61.60 | 69.35 | 65.08 | a | 60.72 | 57.18 | 40.03 | 36.00 | 48.66 | |||||||||
1965 | 38.13 | 36.30 | 40.03 | 44.48 | 51.66 | 57.31 | a | 68.23 | 67.00 | 58.26 | a | 56.42 | 45.68 | 37.52 | h | 51.23 | a | |||||||||
1966 | 32.73 | 32.61 | a | 44.10 | 49.93 | 58.56 | 64.27 | 69.94 | 68.48 | 63.43 | 53.18 | c | 44.93 | 35.27 | 51.45 | |||||||||||
1967 | 36.39 | 40.12 | 44.02 | 42.38 | a | 53.69 | 60.12 | 68.69 | ----- | z | 62.50 | 55.19 | 45.73 | 33.64 | q | 50.88 | b | |||||||||
1968 | 34.74 | 42.60 | d | 41.79 | 44.55 | 55.00 | 64.20 | 67.08 | 62.90 | 61.75 | 53.63 | a | 42.33 | a | 33.35 | 50.33 | ||||||||||
1969 | 38.79 | 34.77 | 37.24 | 47.73 | 56.34 | 61.88 | 69.05 | 69.60 | 62.92 | 48.76 | 42.05 | 38.27 | 50.62 | |||||||||||||
1970 | 35.40 | 40.29 | 39.11 | 42.15 | 50.72 | v | ----- | z | 70.98 | a | 68.23 | 60.00 | 49.98 | a | 44.31 | a | 35.10 | 48.56 | b | |||||||
1971 | 36.40 | 37.74 | a | 42.78 | a | 46.12 | 50.00 | a | 62.70 | 71.70 | a | 65.52 | 61.57 | 47.58 | a | 41.18 | 28.91 | i | 51.21 | a | ||||||
1972 | 35.88 | b | 40.78 | b | 50.09 | d | 48.85 | 55.50 | a | 63.46 | b | 70.59 | b | 66.40 | 60.39 | c | 50.82 | ----- | z | 31.08 | y | 54.28 | b | |||
1973 | 31.97 | 36.44 | a | 37.95 | a | 43.23 | 56.22 | a | 64.77 | 68.55 | c | 66.83 | d | 62.57 | a | 54.07 | a | 41.06 | d | 37.15 | a | 50.07 | ||||
1974 | 32.95 | 36.66 | c | 42.40 | f | 47.04 | e | 57.00 | d | 69.07 | a | ----- | z | 67.16 | o | 61.68 | 52.65 | 42.10 | 32.61 | 47.97 | c | |||||
1975 | 35.60 | 35.61 | 37.66 | 40.43 | 52.58 | ----- | z | ----- | z | 65.32 | n | 62.65 | 52.32 | 42.20 | 37.77 | e | 44.09 | c | ||||||||
1976 | 37.71 | 40.14 | 39.35 | 45.17 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.59 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 34.33 | 37.36 | 40.33 | 46.55 | 54.36 | 62.86 | 68.81 | 66.51 | 62.43 | 52.68 | 42.49 | 36.09 | 50.12 | |||||||||||||
S.D. | 3.36 | 3.81 | 3.91 | 3.25 | 2.61 | 2.54 | 1.91 | 2.37 | 2.67 | 2.98 | 2.86 | 2.65 | 0.89 | |||||||||||||
SKEW | -0.76 | -0.21 | 0.43 | 0.24 | -0.52 | 0.38 | -0.51 | 0.84 | 2.08 | 0.01 | 0.04 | 0.59 | -0.40 | |||||||||||||
MAX | 39.32 | 45.16 | 50.09 | 53.37 | 58.56 | 69.07 | 72.79 | 73.52 | 73.54 | 58.42 | 48.53 | 42.47 | 51.68 | |||||||||||||
MIN | 24.91 | 29.88 | 33.18 | 40.43 | 48.71 | 57.31 | 63.19 | 62.90 | 58.26 | 47.58 | 36.42 | 32.52 | 48.25 | |||||||||||||
YRS | 31 | 32 | 30 | 31 | 28 | 30 | 31 | 29 | 33 | 33 | 33 | 27 | 16 |