YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1903 | 38.80 | u | 16.82 | 40.71 | b | 46.90 | 53.70 | a | 66.88 | a | 70.33 | a | 72.80 | a | 60.05 | b | 50.72 | a | 41.57 | a | 26.98 | 49.77 | a | |||
1904 | 26.25 | c | 38.37 | b | 42.10 | a | 48.62 | d | 56.68 | 63.52 | 71.18 | a | 72.07 | d | 62.81 | a | 47.80 | a | 41.00 | 31.87 | 50.19 | |||||
1905 | 30.77 | 30.89 | 43.58 | 50.47 | 52.43 | b | 65.38 | 72.38 | a | 72.12 | a | 62.25 | 45.69 | 37.17 | 23.33 | a | 48.87 | |||||||||
1906 | ----- | z | 35.33 | a | 37.89 | 47.68 | 56.32 | a | 61.85 | 72.69 | b | 69.59 | c | 61.19 | a | 47.97 | b | 35.07 | b | 34.69 | b | 50.93 | a | |||
1907 | 26.58 | 42.02 | a | 42.61 | 52.27 | 54.52 | b | 60.17 | d | 72.47 | a | 68.90 | b | 60.39 | b | 52.56 | o | 37.33 | 34.20 | c | 50.13 | a | ||||
1908 | 31.76 | b | 32.91 | b | 40.58 | a | 51.43 | a | 50.57 | c | 59.48 | g | 71.56 | v | 71.77 | i | 62.70 | c | 39.72 | a | 33.50 | v | 28.16 | f | 44.24 | e |
1909 | 36.84 | f | 34.90 | g | 40.61 | c | 46.26 | g | 52.17 | j | 66.81 | a | 72.04 | d | 71.87 | 59.81 | c | 52.13 | a | 38.83 | c | ----- | z | 57.44 | e | |
1910 | 25.30 | d | 30.85 | d | 49.07 | j | 53.38 | e | 60.83 | m | 67.48 | f | 74.65 | r | 71.25 | a | 64.80 | 50.79 | 44.31 | a | ----- | z | 48.67 | e | ||
1911 | ----- | z | 18.50 | r | 39.43 | j | 48.62 | q | 55.32 | a | 65.20 | c | ----- | z | 70.73 | ----- | z | ----- | z | ----- | z | 31.52 | g | 63.75 | i | |
1912 | 30.36 | b | 30.98 | a | 35.88 | e | 38.92 | f | ----- | z | 57.35 | t | 67.00 | r | 67.53 | m | 56.25 | r | 45.22 | o | 42.86 | p | 28.57 | p | 32.41 | i |
1913 | 21.86 | q | ----- | z | 37.15 | n | 50.45 | k | 58.35 | g | 61.55 | b | 71.04 | g | 69.98 | i | 58.68 | h | 46.76 | f | 39.59 | n | 22.25 | s | 61.55 | k |
1914 | 28.00 | w | ----- | z | ----- | z | ----- | z | ----- | z | 65.92 | l | 70.40 | k | 70.50 | g | 61.50 | p | ----- | z | ----- | z | ----- | z | ----- | z |
1915 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.94 | m | 24.59 | n | ----- | z |
1916 | 26.91 | t | 36.85 | p | 42.46 | q | 51.78 | l | 54.57 | j | 63.43 | c | 70.58 | r | 68.63 | d | 62.69 | a | 48.17 | g | 37.14 | a | 31.44 | m | 57.97 | h |
1917 | 14.60 | g | 34.41 | f | 30.03 | p | 48.29 | m | 49.58 | s | 65.74 | c | 75.91 | t | 71.07 | x | ----- | z | ----- | z | ----- | z | ----- | z | 65.74 | 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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 57.75 | i | 62.15 | j | 75.56 | 72.87 | l | 61.30 | y | ----- | z | 32.26 | m | 28.60 | 52.08 | j | ||
1952 | 28.56 | 32.90 | 34.76 | 50.92 | 59.15 | 66.72 | 73.32 | 73.82 | 65.03 | 58.24 | 36.50 | 32.24 | 51.01 | |||||||||||||
1953 | 37.79 | 33.95 | 42.90 | a | 49.53 | 50.92 | 65.05 | 75.23 | 68.62 | w | 57.39 | u | 43.65 | ----- | z | 22.77 | 46.86 | c | ||||||||
1954 | ----- | z | ----- | z | 31.26 | n | ----- | z | ----- | z | 65.18 | b | 76.96 | c | 72.33 | e | 64.43 | 52.42 | 41.56 | f | 28.02 | 59.89 | f | |||
1955 | 18.95 | 24.76 | a | 39.52 | a | 47.67 | 57.50 | i | 66.92 | 74.40 | a | 74.35 | 63.97 | 53.94 | 39.76 | a | ----- | z | 50.42 | b | ||||||
1956 | ----- | z | 24.00 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.35 | 32.98 | 29.32 | 37.89 | i | |||
1957 | 23.92 | 38.88 | 42.32 | a | 47.07 | 53.85 | 69.21 | b | 74.61 | 75.00 | 63.32 | 49.32 | 31.65 | 35.13 | a | 50.36 | ||||||||||
1958 | 30.66 | 40.98 | 37.06 | 45.12 | 61.94 | 67.38 | 73.55 | 75.81 | 64.43 | 53.42 | 35.50 | 37.53 | 51.95 | |||||||||||||
1959 | 34.67 | a | 33.18 | 41.48 | 51.57 | 54.53 | a | 69.63 | 77.32 | 73.08 | 60.85 | 51.98 | 39.25 | 28.98 | 51.38 | |||||||||||
1960 | 23.42 | 31.03 | 43.31 | 50.15 | 58.10 | 70.42 | 77.84 | 73.77 | a | 67.67 | 51.76 | 40.30 | 30.84 | 51.55 | ||||||||||||
1961 | 29.03 | 37.43 | 40.82 | 47.16 | a | 57.12 | a | 70.78 | 76.87 | 73.84 | 59.38 | 49.27 | 34.37 | 29.31 | 50.45 | |||||||||||
1962 | 22.31 | 32.43 | 35.48 | 53.62 | 56.11 | 66.53 | 73.23 | 72.48 | 65.68 | 53.34 | 43.65 | 29.24 | 50.34 | |||||||||||||
1963 | 25.55 | 40.93 | 38.29 | b | 44.20 | 61.85 | 61.98 | 75.92 | 74.27 | 67.27 | 57.23 | 40.45 | a | 25.81 | 51.15 | |||||||||||
1964 | 26.77 | 28.59 | 35.45 | 45.83 | 55.53 | 63.82 | 77.06 | 72.65 | 61.93 | 54.77 | i | 34.40 | 34.78 | d | 48.80 | a | ||||||||||
1965 | 33.47 | 34.91 | 37.40 | 48.18 | 52.81 | 63.90 | 73.77 | 70.98 | 58.27 | 53.85 | 43.73 | 31.44 | 50.23 | |||||||||||||
1966 | 28.05 | 30.89 | 42.21 | 50.05 | 63.08 | 69.20 | 77.82 | 74.52 | 65.73 | 51.56 | 42.98 | 26.48 | b | 51.88 | ||||||||||||
1967 | 30.40 | 37.77 | 44.77 | 41.42 | 54.88 | b | 61.18 | e | 75.73 | a | 74.40 | 62.22 | 51.82 | 42.00 | 23.53 | 50.01 | ||||||||||
1968 | 29.32 | f | 39.47 | 42.29 | 44.38 | 56.45 | 66.82 | 74.37 | 66.06 | 59.25 | 50.39 | 39.22 | 28.97 | 51.61 | a | |||||||||||
1969 | 37.21 | 32.55 | 37.05 | 49.63 | 62.52 | 63.02 | 74.91 | c | 75.61 | 66.27 | 45.02 | 36.48 | 32.73 | 51.08 | ||||||||||||
1970 | 32.73 | 38.59 | 38.11 | 43.03 | 57.44 | 64.85 | 73.56 | e | 73.12 | e | 58.80 | 46.32 | 40.77 | 27.81 | 49.59 | |||||||||||
1971 | 30.56 | 31.52 | 40.02 | 46.78 | 53.69 | b | 66.00 | 72.89 | 72.31 | 58.41 | c | 46.77 | 36.35 | 27.50 | 48.57 | |||||||||||
1972 | 30.76 | 37.03 | 46.92 | 48.82 | 57.77 | 68.13 | 74.77 | r | 69.48 | 60.50 | a | 49.84 | 34.60 | 21.16 | 47.73 | a | ||||||||||
1973 | 22.90 | 34.54 | 36.39 | 45.67 | 58.69 | 66.25 | 71.92 | 72.06 | 59.85 | 50.85 | a | 40.78 | 34.15 | 49.50 | ||||||||||||
1974 | 28.08 | 34.34 | 45.65 | 47.55 | 60.85 | a | 70.33 | 73.57 | b | 70.50 | j | 63.78 | 49.92 | 40.13 | 28.61 | 49.35 | a | |||||||||
1975 | 28.31 | 33.84 | 38.32 | 41.57 | 52.07 | a | 63.33 | a | 72.67 | b | 69.43 | b | 61.33 | f | 50.47 | 35.92 | 33.05 | 47.18 | a | |||||||
1976 | 29.69 | 37.28 | 35.67 | a | 47.43 | 60.68 | c | 65.95 | i | 75.38 | b | 69.00 | o | 62.78 | 50.34 | 40.53 | 28.93 | a | 46.87 | b | ||||||
1977 | 27.35 | 34.93 | a | 36.74 | 51.90 | 51.82 | f | 71.90 | i | 75.46 | d | 72.18 | i | 66.22 | 54.31 | 43.08 | 37.81 | 47.53 | c | |||||||
1978 | 34.47 | 38.38 | 46.67 | b | 47.68 | 54.42 | 67.84 | b | 75.61 | c | 72.97 | l | 60.65 | 53.58 | 35.23 | 25.33 | d | 49.08 | a | |||||||
1979 | 21.71 | 33.54 | 40.31 | 49.15 | c | 57.58 | a | 67.02 | a | 74.84 | f | 67.83 | k | 66.85 | 54.77 | 35.48 | 35.88 | c | 46.23 | b | ||||||
1980 | 30.95 | 35.66 | 39.10 | a | 49.52 | 54.54 | f | 65.15 | 74.85 | 68.91 | o | 63.32 | 49.84 | c | 42.78 | e | 35.18 | 48.63 | b | |||||||
1981 | 30.87 | 38.62 | 42.11 | 53.25 | 56.26 | b | 70.06 | c | 77.64 | c | 75.23 | 66.90 | a | 48.63 | 44.50 | 39.07 | d | 53.60 | ||||||||
1982 | 31.13 | 34.21 | 41.60 | 47.76 | c | 56.06 | g | 64.29 | a | 74.50 | e | 74.72 | f | 60.90 | 47.98 | d | 37.40 | 31.39 | 47.12 | b | ||||||
1983 | 34.32 | 38.31 | a | 43.55 | a | 43.55 | b | 52.96 | d | 65.45 | a | 73.00 | c | 73.00 | h | 65.38 | 53.73 | c | ----- | z | ----- | z | 52.25 | c | ||
1984 | 23.21 | 30.84 | 38.39 | 45.81 | a | 59.47 | a | 62.82 | 74.19 | 71.55 | 64.68 | 46.35 | 40.60 | j | 26.83 | j | 51.73 | b | ||||||||
1985 | 23.48 | 35.33 | j | 40.52 | 54.02 | a | 61.81 | w | 72.07 | h | 75.75 | a | 74.19 | d | 59.34 | a | 50.98 | 36.81 | a | 24.81 | 48.88 | c | ||||
1986 | 35.50 | 39.20 | c | 46.68 | c | 48.91 | b | 57.05 | l | 71.53 | 72.53 | a | 75.26 | 58.12 | 49.40 | a | 42.12 | a | 30.26 | 51.77 | a | |||||
1987 | 21.66 | 35.28 | a | 39.83 | b | 53.03 | a | 59.39 | d | 69.07 | a | 70.87 | a | 71.27 | c | 62.87 | 54.67 | a | 38.05 | 28.79 | 50.40 | |||||
1988 | 21.07 | h | 35.24 | b | 41.85 | e | 50.20 | e | 57.16 | o | 70.40 | d | 77.16 | b | 70.24 | j | 62.28 | a | 57.60 | b | 38.96 | d | 27.12 | f | 54.21 | d |
1989 | 24.22 | h | 27.80 | e | ----- | z | ----- | z | ----- | z | ----- | z | 77.34 | b | 71.90 | a | 63.07 | 51.97 | 41.17 | 31.42 | 52.10 | e | ||||
1990 | 33.21 | 26.43 | a | 42.73 | 52.70 | 56.67 | a | 67.92 | 75.85 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.79 | e | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 28.82 | 34.19 | 40.46 | 48.50 | 56.56 | 66.11 | 74.52 | 72.41 | 62.66 | 50.72 | 38.82 | 30.20 | 50.64 | |||||||||||||
S.D. | 4.59 | 4.75 | 3.22 | 3.25 | 3.29 | 2.87 | 2.01 | 2.22 | 2.69 | 3.65 | 3.31 | 4.32 | 1.17 | |||||||||||||
SKEW | -0.11 | -1.14 | 0.14 | -0.26 | 0.21 | -0.02 | -0.07 | -0.69 | 0.07 | -0.46 | -0.10 | 0.02 | 0.50 | |||||||||||||
MAX | 37.79 | 42.02 | 46.92 | 54.02 | 63.08 | 71.53 | 77.84 | 75.81 | 67.67 | 58.24 | 44.50 | 39.07 | 53.60 | |||||||||||||
MIN | 18.95 | 16.82 | 34.76 | 41.42 | 50.57 | 60.17 | 70.33 | 66.06 | 58.12 | 39.72 | 31.65 | 21.16 | 48.57 | |||||||||||||
YRS | 40 | 44 | 44 | 43 | 36 | 44 | 43 | 36 | 44 | 44 | 42 | 40 | 19 |