YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1909 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1910 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1911 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1912 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1914 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1916 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | 65.61 | ----- | z | ----- | z | ----- | z | ----- | z | 65.61 | k | |
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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 35.94 | v | 35.70 | 35.05 | 35.37 | j | ||
1959 | 27.90 | 27.16 | 30.24 | 38.53 | 48.47 | 57.32 | 60.08 | 60.32 | 53.62 | 43.10 | 34.15 | 30.29 | 42.60 | |||||||||||||
1960 | 24.94 | 20.43 | 33.76 | 41.45 | 46.97 | 57.68 | 59.16 | 60.39 | 54.82 | 43.16 | 36.38 | f | 27.03 | 42.71 | a | |||||||||||
1961 | 27.82 | a | 28.19 | a | 31.85 | 37.83 | a | 46.95 | a | 55.52 | 57.69 | 57.50 | 49.17 | 42.85 | 30.87 | 24.78 | a | 40.92 | ||||||||
1962 | 23.48 | 30.68 | 27.52 | 40.63 | 48.05 | 52.95 | 57.03 | b | 59.58 | a | 51.84 | a | 45.55 | 35.41 | c | 29.27 | 41.83 | |||||||||
1963 | 18.71 | c | 29.09 | 30.87 | a | 40.73 | 49.50 | 54.38 | 61.35 | a | 56.71 | 56.20 | 48.70 | a | 37.86 | a | 27.81 | 42.66 | ||||||||
1964 | 22.15 | 19.78 | 26.71 | 36.42 | 47.47 | 54.63 | 61.78 | a | 57.71 | 52.18 | 44.32 | 32.88 | a | 25.13 | 40.10 | |||||||||||
1965 | 27.45 | 23.95 | 22.11 | 37.90 | d | 44.00 | 51.73 | 58.78 | a | 56.39 | 49.55 | a | 45.03 | 36.87 | 30.76 | 40.38 | ||||||||||
1966 | 21.97 | 22.21 | 33.89 | 38.57 | 48.58 | a | 53.72 | 61.92 | 56.56 | 52.25 | 43.55 | 36.93 | a | 28.17 | b | 41.53 | ||||||||||
1967 | 27.10 | 26.20 | 35.77 | 39.59 | a | 45.11 | 51.93 | 58.39 | 54.92 | 50.64 | a | 44.16 | 37.29 | a | 23.86 | b | 41.25 | |||||||||
1968 | 29.48 | a | 30.12 | 32.09 | b | 35.73 | 45.70 | a | 58.05 | a | 58.94 | 56.40 | 51.50 | 47.06 | 32.23 | 29.26 | 42.21 | |||||||||
1969 | 32.73 | a | 29.16 | 25.82 | a | 42.31 | a | 49.40 | 52.77 | 61.82 | 60.21 | 53.77 | 39.85 | 32.95 | 30.73 | a | 42.63 | |||||||||
1970 | 28.33 | h | 33.26 | c | 27.58 | 36.88 | 49.65 | 54.85 | 60.95 | a | 61.40 | 52.22 | 39.94 | 34.90 | 30.23 | 43.80 | a | |||||||||
1971 | 28.71 | 26.30 | 33.32 | 38.27 | 44.71 | 57.25 | 58.32 | a | 58.05 | c | 51.30 | 42.69 | 34.93 | 27.02 | 41.74 | |||||||||||
1972 | 29.08 | 31.38 | 37.40 | 41.50 | 46.56 | 56.82 | 60.47 | 58.00 | 53.85 | 44.58 | 25.93 | 27.10 | 42.72 | |||||||||||||
1973 | 25.30 | a | 26.61 | 30.27 | 31.66 | a | 45.70 | a | 55.68 | 58.23 | 58.85 | 51.10 | 44.48 | 37.13 | 27.74 | 41.06 | ||||||||||
1974 | 24.32 | 25.64 | 36.85 | 37.34 | a | 50.74 | 56.75 | 59.11 | 55.35 | 50.32 | 43.85 | 30.28 | 22.24 | 41.07 | ||||||||||||
1975 | 24.32 | 23.23 | 29.05 | a | 35.05 | 43.74 | 51.85 | 57.52 | a | 57.52 | 48.43 | 40.08 | 31.53 | 28.52 | 39.24 | |||||||||||
1976 | 23.31 | 31.48 | a | 30.76 | 41.47 | a | 46.90 | 55.52 | 61.58 | 60.13 | 53.40 | 40.77 | 32.53 | 25.47 | a | 41.94 | ||||||||||
1977 | 21.81 | 26.68 | 28.62 | a | 38.00 | 48.97 | 57.91 | a | 62.25 | a | 61.08 | 54.19 | a | ----- | z | ----- | z | 31.57 | a | 43.11 | b | |||||
1978 | 26.39 | ----- | z | 33.81 | ----- | z | 45.26 | 54.93 | a | 62.31 | 58.55 | 54.57 | 45.29 | ----- | z | ----- | z | 47.64 | d | |||||||
1979 | 18.15 | a | 28.56 | d | 32.22 | a | 38.73 | 45.60 | a | 54.50 | ----- | z | 57.05 | 54.97 | a | 45.72 | a | 23.35 | 29.97 | a | 38.98 | a | ||||
1980 | 27.00 | 29.53 | 30.21 | b | 34.28 | c | 43.85 | ----- | z | ----- | z | ----- | z | 54.92 | 43.53 | ----- | z | ----- | z | 37.62 | e | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 25.34 | 27.13 | 30.94 | 38.23 | 46.90 | 55.08 | 59.88 | 58.56 | 52.49 | 43.73 | 33.35 | 28.19 | 41.49 | |||||||||||||
S.D. | 3.61 | 3.64 | 3.72 | 2.68 | 2.07 | 2.05 | 1.76 | 2.42 | 2.11 | 2.27 | 3.85 | 2.94 | 1.01 | |||||||||||||
SKEW | -0.19 | -0.44 | -0.30 | -0.53 | 0.10 | -0.18 | -0.02 | 0.99 | -0.20 | -0.03 | -1.14 | 0.07 | -0.61 | |||||||||||||
MAX | 32.73 | 33.26 | 37.40 | 42.31 | 50.74 | 58.05 | 62.31 | 65.61 | 56.20 | 48.70 | 37.86 | 35.05 | 42.72 | |||||||||||||
MIN | 18.15 | 19.78 | 22.11 | 31.66 | 43.74 | 51.73 | 57.03 | 54.92 | 48.43 | 39.85 | 23.35 | 22.24 | 39.24 | |||||||||||||
YRS | 21 | 21 | 22 | 21 | 22 | 21 | 20 | 22 | 22 | 21 | 19 | 21 | 16 |