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 | 65.68 | 60.23 | 50.48 | 30.20 | 29.06 | 47.13 | g | |||||
1933 | 29.71 | 26.93 | 35.45 | 36.80 | 42.84 | 53.00 | 58.97 | 63.29 | 64.24 | a | 54.65 | 38.13 | 28.58 | 44.38 | ||||||||||||
1934 | 28.39 | 31.96 | 35.71 | 45.03 | 49.32 | 61.33 | 68.06 | 65.94 | 61.93 | 48.19 | 39.47 | 38.94 | 47.86 | |||||||||||||
1935 | 33.87 | 32.18 | 38.19 | 45.37 | 48.19 | 59.14 | a | 66.87 | 65.61 | 54.43 | 41.58 | 31.23 | 29.97 | a | 45.55 | |||||||||||
1936 | 24.74 | 32.07 | 37.48 | 43.13 | 53.13 | 60.93 | 66.81 | 64.33 | a | 57.55 | a | 45.06 | 35.07 | 28.55 | 45.74 | |||||||||||
1937 | 25.19 | 31.46 | 33.06 | 40.83 | 51.00 | 57.90 | 66.39 | 65.00 | 59.70 | 47.58 | 32.80 | 32.53 | a | 45.29 | ||||||||||||
1938 | 29.57 | a | 33.50 | 37.45 | 40.90 | 47.71 | 61.30 | 61.55 | 62.71 | 55.93 | 46.87 | 28.33 | 29.00 | a | 44.57 | |||||||||||
1939 | 26.61 | 24.39 | 33.48 | 41.10 | 48.16 | 59.30 | 65.35 | 62.16 | 59.10 | 44.65 | 38.90 | 30.84 | 44.50 | |||||||||||||
1940 | 28.94 | 32.93 | 38.48 | 42.57 | 51.65 | 60.87 | 64.77 | 62.87 | 59.50 | 47.68 | 34.27 | 34.71 | 46.60 | |||||||||||||
1941 | 31.61 | 36.96 | 35.94 | 39.27 | 49.13 | 56.73 | 64.13 | 62.55 | 58.30 | 46.39 | 33.93 | 29.76 | f | 46.81 | a | |||||||||||
1942 | 28.16 | 27.61 | 31.81 | 39.72 | a | 44.90 | 55.07 | 65.55 | 62.74 | 56.33 | 45.52 | 36.03 | 28.60 | a | 43.50 | |||||||||||
1943 | 29.79 | b | 28.52 | c | 36.06 | 42.77 | 45.26 | 56.83 | a | 62.38 | g | 63.10 | 54.33 | 43.81 | ----- | z | 26.35 | 42.68 | b | |||||||
1944 | 22.90 | 28.21 | 30.87 | 33.23 | 43.26 | 59.73 | 64.17 | a | 60.16 | 56.50 | 47.26 | 35.00 | 24.23 | 42.13 | ||||||||||||
1945 | 25.16 | 28.25 | 28.32 | 33.77 | 46.23 | 49.27 | 64.65 | 64.58 | 59.57 | 44.23 | 32.97 | 25.73 | p | 43.36 | a | |||||||||||
1946 | 28.10 | 24.11 | 34.70 | a | 44.20 | 47.94 | 63.07 | 63.08 | s | 62.74 | 60.87 | 47.65 | ----- | z | 30.13 | 44.35 | b | |||||||||
1947 | 24.94 | 31.07 | 32.68 | ----- | z | 61.16 | 61.77 | 69.87 | 70.00 | c | 56.20 | 41.48 | 27.73 | 26.29 | 45.74 | a | ||||||||||
1948 | 27.22 | h | 32.38 | 34.00 | r | 41.57 | p | 45.52 | 59.13 | 65.00 | i | 60.07 | p | 54.77 | 47.39 | 27.66 | a | 28.97 | 42.26 | e | ||||||
1949 | 24.89 | d | 26.96 | a | 36.13 | 38.30 | 45.81 | 59.83 | 65.59 | d | 58.78 | d | 54.57 | 37.65 | 27.37 | 24.90 | 41.73 | |||||||||
1950 | 25.48 | h | 29.67 | d | 33.22 | d | 37.18 | b | 40.08 | e | 51.20 | 64.38 | j | 60.93 | d | 47.23 | ----- | z | 29.10 | 23.90 | 39.17 | c | ||||
1951 | 22.06 | ----- | z | 30.60 | u | ----- | z | 49.77 | a | 59.81 | i | 70.16 | 59.71 | 49.40 | 42.90 | 30.53 | 26.97 | 43.94 | d | |||||||
1952 | 27.26 | 26.10 | 30.26 | 37.45 | a | 47.47 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.27 | h | |||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | 28.93 | p | 30.25 | ----- | z | ----- | z | 48.61 | 57.87 | 66.48 | 61.67 | a | 57.67 | 45.55 | 32.30 | 26.65 | 47.45 | c | ||||||||
1955 | 26.06 | 21.54 | 34.03 | 37.30 | 46.35 | 55.27 | 63.00 | 62.32 | 52.67 | 46.29 | 30.70 | 25.47 | a | 41.75 | ||||||||||||
1956 | 27.84 | 22.97 | 30.93 | a | 38.77 | 48.94 | 62.57 | 63.03 | 59.61 | 55.17 | 43.16 | 26.10 | 23.77 | 41.90 | ||||||||||||
1957 | 32.97 | 35.00 | f | 34.14 | j | 39.27 | h | 47.05 | i | 56.50 | n | 64.50 | i | 62.45 | i | 46.92 | q | 42.09 | h | 26.26 | k | 22.24 | j | 32.97 | k | |
1958 | 20.45 | i | 29.95 | i | 32.05 | j | 39.86 | h | 49.24 | j | 62.71 | i | 63.59 | i | 62.95 | j | 56.62 | i | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | 25.06 | o | 26.55 | f | 31.28 | f | 42.38 | d | 46.29 | g | 56.12 | n | 65.52 | f | 63.04 | h | 54.00 | j | 43.00 | i | 32.56 | e | 29.25 | g | 37.47 | j |
1960 | 23.16 | f | 25.57 | f | 35.09 | i | 37.96 | f | 43.79 | l | 59.12 | f | 64.80 | f | 63.27 | i | 56.52 | i | 43.20 | f | 32.65 | g | 23.55 | i | ----- | z |
1961 | 26.74 | l | 26.17 | j | 33.24 | j | 39.71 | i | 45.23 | r | 61.95 | j | 63.95 | j | 61.95 | i | 55.79 | f | 40.46 | e | 32.04 | d | 29.50 | g | 36.25 | j |
1962 | 25.97 | b | 27.70 | e | 30.59 | b | 43.07 | b | 44.46 | g | 51.48 | e | 64.54 | e | 61.62 | e | 59.21 | f | 45.25 | c | 34.59 | c | 30.72 | f | 42.76 | c |
1963 | 26.37 | d | 29.31 | b | 31.64 | f | 38.61 | g | 50.19 | d | 60.31 | a | 66.31 | b | 61.90 | 55.79 | f | 44.69 | b | 33.87 | g | 23.29 | g | 48.44 | e | |
1964 | 20.86 | c | 19.89 | b | 31.48 | b | 37.93 | c | 48.17 | a | 56.68 | e | 64.93 | b | 62.68 | 56.35 | d | 43.11 | d | 27.95 | i | 25.73 | e | 42.53 | a | |
1965 | 27.81 | d | 24.88 | b | 31.00 | f | 40.00 | g | 46.31 | b | 53.40 | e | 64.65 | e | 62.04 | e | 53.80 | e | 39.64 | f | 36.50 | h | 32.20 | f | 47.56 | e |
1966 | 21.33 | g | 23.78 | e | 30.96 | e | 39.04 | e | 48.80 | f | 56.23 | d | 64.43 | h | 63.74 | h | 55.42 | f | 40.35 | e | 33.33 | i | 26.16 | f | 38.07 | g |
1967 | 21.58 | s | 28.86 | f | 35.41 | d | 39.00 | e | 46.68 | f | 57.92 | d | 65.16 | f | 61.22 | d | 56.17 | f | 41.00 | g | 33.83 | f | 28.55 | i | 48.39 | h |
1968 | 29.24 | f | 36.12 | e | 37.69 | e | 40.46 | d | 45.32 | f | 56.05 | h | 62.83 | g | 58.30 | h | 52.00 | g | 40.08 | e | 32.09 | g | 20.46 | g | 38.59 | h |
1969 | 30.38 | e | 30.22 | e | 26.12 | e | 39.27 | d | 46.96 | e | 54.75 | f | 65.79 | g | 64.44 | f | 55.42 | f | 44.81 | d | 31.90 | j | 27.58 | g | 36.29 | f |
1970 | 22.12 | e | 31.13 | e | 33.48 | f | 36.71 | f | 49.62 | g | 59.56 | e | 65.32 | f | 61.46 | e | 55.00 | f | 39.08 | f | 30.13 | g | 26.08 | f | 43.57 | h |
1971 | 23.83 | g | 26.68 | i | 31.42 | e | 38.88 | d | 48.80 | f | 56.60 | e | 66.04 | e | 62.73 | e | 56.64 | e | 43.39 | h | 33.12 | e | 30.14 | i | 49.35 | e |
1972 | 23.68 | f | 24.78 | f | 37.30 | d | 38.89 | l | 44.92 | e | 56.69 | d | 64.08 | f | 61.81 | d | 55.80 | e | 49.00 | g | 29.32 | e | 26.74 | h | 47.64 | f |
1973 | 24.04 | g | 31.65 | h | 33.48 | d | 34.43 | g | 47.92 | g | 57.72 | e | 64.32 | f | 60.64 | c | 56.58 | f | 40.44 | f | 31.14 | i | 20.78 | h | 50.61 | i |
1974 | 26.46 | g | 22.91 | f | 36.36 | f | 40.39 | g | 48.88 | f | 62.56 | e | 63.96 | f | 60.89 | d | 57.29 | f | 46.96 | d | 33.60 | e | 24.21 | g | 51.00 | h |
1975 | 26.64 | f | 28.95 | f | 34.40 | f | 36.16 | e | 43.00 | g | 54.57 | g | 63.92 | f | 63.00 | f | 54.76 | e | 42.88 | f | 30.46 | f | 27.15 | e | 39.36 | i |
1976 | 23.75 | g | ----- | z | 32.00 | f | 39.46 | d | 48.80 | f | 56.08 | d | 63.50 | e | 60.85 | e | 56.28 | e | 42.17 | g | 30.00 | g | 23.08 | e | 49.87 | f |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.38 | g | 64.48 | 55.61 | g | 47.07 | q | 31.50 | n | 28.68 | i | 64.48 | k | |
1978 | 31.50 | g | 30.27 | f | 41.11 | m | 37.44 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.44 | k |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 27.12 | 28.77 | 33.75 | 39.69 | 47.83 | 57.80 | 65.22 | 62.61 | 56.55 | 45.06 | 32.34 | 28.10 | 44.27 | |||||||||||||
S.D. | 3.24 | 4.12 | 3.13 | 3.01 | 3.89 | 3.45 | 2.41 | 2.19 | 3.50 | 3.40 | 3.53 | 3.67 | 1.98 | |||||||||||||
SKEW | 0.08 | -0.17 | -0.38 | -0.03 | 1.23 | -0.61 | -0.21 | 1.10 | -0.37 | 0.28 | 0.22 | 1.14 | 0.10 | |||||||||||||
MAX | 33.87 | 36.96 | 38.48 | 45.37 | 61.16 | 63.07 | 70.16 | 70.00 | 64.24 | 54.65 | 39.47 | 38.94 | 47.86 | |||||||||||||
MIN | 20.86 | 19.89 | 26.12 | 33.23 | 40.08 | 49.27 | 58.97 | 58.78 | 47.23 | 37.65 | 26.10 | 23.08 | 41.73 | |||||||||||||
YRS | 27 | 30 | 29 | 30 | 27 | 33 | 24 | 34 | 29 | 30 | 27 | 24 | 13 |