YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1911 | ----- | z | ----- | z | 25.85 | a | 28.40 | i | 38.05 | a | 49.62 | e | 50.72 | a | 50.21 | ----- | z | 34.05 | l | 30.35 | j | 14.00 | o | 42.89 | g | |
1912 | 18.82 | l | 16.59 | m | 19.84 | i | 26.38 | e | 36.06 | e | 46.16 | a | 51.65 | g | 49.37 | d | 37.38 | m | 30.40 | j | 21.11 | b | 5.78 | d | 30.81 | f |
1913 | 6.52 | b | 9.67 | a | 20.55 | i | 26.64 | s | 44.71 | x | 47.71 | k | 51.11 | v | 54.36 | j | 41.40 | ----- | z | 29.62 | q | 9.58 | r | 19.19 | i | |
1914 | 19.29 | s | 16.50 | t | ----- | z | ----- | z | 38.68 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.06 | v | 8.08 | y | ----- | z |
1915 | ----- | z | 20.45 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.98 | h | 38.39 | i | 28.03 | n | ----- | z | ----- | z |
1916 | ----- | z | 23.50 | i | 28.33 | b | 26.74 | m | 38.30 | p | 44.98 | c | 52.50 | h | 50.23 | a | 42.71 | f | 34.88 | c | 18.79 | d | 9.67 | e | 31.15 | f |
1917 | 10.84 | 15.14 | 12.73 | 24.65 | 33.83 | g | 44.89 | g | 52.77 | i | 44.63 | a | 35.17 | a | 29.96 | g | 27.87 | c | 22.70 | a | 24.22 | d | ||||
1918 | 11.33 | e | 10.92 | o | 25.13 | h | 24.89 | c | 37.46 | f | 51.84 | a | 52.12 | k | 50.97 | 43.60 | d | 36.89 | d | 21.19 | f | 14.76 | 33.47 | e | ||
1919 | 16.02 | b | 13.54 | c | 20.56 | 30.68 | b | 37.95 | j | 46.70 | j | 55.73 | e | 55.24 | l | 43.75 | r | ----- | z | ----- | z | 18.93 | a | 25.91 | f | |
1920 | 22.72 | a | 17.09 | b | 17.83 | b | ----- | z | 40.57 | q | 43.35 | m | 52.66 | l | 49.17 | p | 43.45 | h | 33.70 | d | 18.56 | l | 15.72 | k | 22.84 | h |
1921 | 17.62 | j | 17.79 | b | 27.37 | d | 26.75 | b | 39.32 | 46.46 | c | 52.52 | c | 52.32 | n | 46.56 | f | 38.53 | 28.59 | b | 22.12 | a | 33.27 | c | ||
1922 | 10.27 | c | 13.74 | a | 20.93 | a | 26.48 | b | 38.50 | 49.00 | 51.02 | 50.08 | a | 41.78 | a | 36.74 | 21.62 | a | 18.28 | b | 31.54 | |||||
1923 | 19.29 | b | 12.95 | 15.71 | 28.43 | a | 42.04 | f | 50.00 | n | 58.50 | i | 51.71 | b | 43.45 | 30.34 | 21.58 | 13.09 | c | 26.28 | c | |||||
1924 | 11.62 | f | 21.12 | a | 13.93 | a | 29.59 | c | 35.17 | a | 48.50 | 51.16 | 50.85 | 47.32 | 39.37 | l | 26.67 | a | 16.09 | b | 34.04 | b | ||||
1925 | 14.90 | j | 22.24 | k | 28.12 | c | 33.89 | c | 42.62 | o | 46.87 | 52.98 | 50.20 | a | 45.30 | b | 33.98 | c | 24.91 | h | 17.81 | 38.64 | d | |||
1926 | 11.53 | k | 17.82 | f | 20.94 | o | 33.31 | c | 40.48 | g | 47.57 | b | 51.77 | 51.90 | 43.12 | b | 40.08 | g | 26.44 | e | 15.87 | e | 38.57 | e | ||
1927 | 31.86 | x | 17.44 | c | 20.42 | 29.36 | a | ----- | z | 48.48 | a | 51.94 | e | 49.02 | c | 42.34 | e | ----- | z | ----- | z | ----- | z | 37.00 | e | |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.91 | h | 48.70 | f | 46.20 | e | 37.97 | b | 24.85 | 18.14 | m | 36.34 | i | |
1929 | 14.52 | e | 9.71 | g | 19.79 | c | 27.36 | a | 36.16 | 45.76 | a | 50.42 | 47.60 | a | 39.26 | e | 31.66 | o | 15.96 | c | 23.00 | f | 32.98 | c | ||
1930 | 9.22 | b | 23.06 | b | 20.92 | e | 37.36 | a | 38.07 | b | 49.33 | a | ----- | z | ----- | z | 42.17 | d | 34.78 | a | 23.43 | a | 14.00 | a | 29.24 | b |
1931 | ----- | z | 18.11 | a | 15.89 | c | 28.59 | b | 35.28 | a | 46.88 | d | 55.24 | 51.29 | 47.55 | 37.33 | b | ----- | z | 17.32 | q | 37.35 | c | |||
1932 | 7.79 | b | 21.50 | d | 16.87 | 29.93 | 39.61 | 46.48 | 55.84 | 53.58 | 44.87 | 32.40 | 24.90 | ----- | z | 33.98 | a | |||||||||
1933 | 15.48 | 7.59 | a | 23.89 | 26.85 | 34.17 | a | 52.77 | 56.95 | 50.89 | 47.92 | 40.73 | 30.08 | 25.55 | 34.40 | |||||||||||
1934 | 19.90 | 23.09 | 27.40 | 34.76 | a | 45.60 | 48.41 | b | 57.74 | 54.66 | 44.28 | 40.80 | a | 26.47 | 17.60 | a | 36.73 | |||||||||
1935 | 21.00 | 19.71 | 21.63 | 28.53 | 35.15 | 48.37 | 55.82 | 54.63 | 46.88 | 35.56 | 25.40 | 19.45 | 34.34 | |||||||||||||
1936 | 13.82 | a | 15.03 | 22.56 | 31.80 | 42.76 | 52.14 | a | 57.23 | 53.25 | a | 41.38 | b | 31.29 | 23.73 | 18.09 | b | 33.59 | ||||||||
1937 | 5.13 | 13.77 | 19.27 | 27.69 | a | 37.29 | 43.30 | 51.50 | b | 49.57 | a | 42.25 | 34.94 | 22.78 | 21.40 | 30.74 | ||||||||||
1938 | 17.11 | 20.07 | 22.81 | 30.43 | 39.58 | 50.20 | 52.92 | 54.82 | 47.55 | 39.44 | 17.34 | a | 19.16 | 34.29 | ||||||||||||
1939 | 17.74 | 9.68 | 24.95 | 34.88 | a | 43.35 | 48.27 | 55.08 | 52.06 | 47.21 | a | 38.35 | 28.57 | 25.18 | a | 35.44 | ||||||||||
1940 | 14.77 | 18.33 | 25.65 | a | 32.68 | 42.19 | 49.88 | 56.65 | 53.56 | 48.03 | 38.56 | 23.16 | a | 22.14 | b | 35.47 | ||||||||||
1941 | 19.18 | 20.93 | 21.18 | 28.60 | 41.63 | 46.80 | 53.74 | 52.45 | 42.20 | 35.52 | 25.73 | 19.16 | 33.93 | |||||||||||||
1942 | 14.30 | a | 10.16 | 17.32 | 34.26 | a | 36.50 | 46.43 | 55.03 | 56.56 | 45.48 | 38.44 | 25.74 | c | 19.74 | 33.33 | ||||||||||
1943 | 16.42 | a | 22.14 | 18.09 | b | 37.48 | 37.21 | 45.45 | 53.18 | 56.60 | 47.92 | 41.39 | 27.21 | a | 19.90 | 35.25 | ||||||||||
1944 | 17.44 | 16.83 | 16.46 | c | 26.12 | b | 39.65 | 47.28 | 52.80 | a | 55.32 | 47.73 | 38.42 | 25.21 | a | 17.11 | 33.36 | |||||||||
1945 | 16.95 | 17.39 | 22.84 | 25.73 | 41.48 | 48.08 | 55.08 | 53.65 | 47.76 | i | 37.11 | 24.66 | a | 16.45 | 32.68 | a | ||||||||||
1946 | ----- | z | 19.52 | 28.71 | 37.55 | 35.68 | 44.78 | 55.48 | a | 56.87 | 47.88 | a | 27.71 | ----- | z | 18.10 | a | 37.23 | b | |||||||
1947 | ----- | z | 14.21 | ----- | z | 21.17 | 41.43 | c | 44.48 | a | 54.79 | 67.44 | 48.62 | 43.89 | 23.02 | 18.31 | e | 37.73 | b | |||||||
1948 | 5.73 | c | 15.38 | 16.92 | 32.08 | 42.90 | 50.29 | a | 54.50 | 52.48 | 49.40 | a | 36.02 | 17.07 | a | 15.35 | 32.34 | |||||||||
1949 | 10.60 | ----- | z | 29.44 | d | 35.12 | 40.08 | 51.80 | c | ----- | z | 52.02 | j | 47.40 | 36.42 | 30.53 | 18.47 | 33.32 | c | |||||||
1950 | 13.47 | 22.34 | 21.89 | 33.15 | 35.76 | 49.08 | 49.94 | 50.26 | 45.63 | 42.39 | 23.63 | 23.92 | 34.29 | |||||||||||||
1951 | 13.94 | 17.39 | 24.44 | 28.17 | 41.50 | 44.27 | 55.63 | 52.79 | 44.70 | 36.15 | 23.42 | 14.16 | 33.04 | |||||||||||||
1952 | 15.98 | 15.59 | 17.73 | 32.53 | 40.94 | 51.18 | 54.63 | 53.98 | 47.98 | 38.61 | 20.02 | 19.24 | 34.03 | |||||||||||||
1953 | 22.92 | 16.00 | 25.40 | a | 27.55 | 38.13 | 51.10 | 56.52 | 52.19 | 48.63 | 38.03 | 27.18 | 13.19 | 34.74 | ||||||||||||
1954 | 18.67 | a | 21.80 | 17.18 | 31.08 | 41.24 | 50.32 | 59.10 | 52.00 | 47.27 | 38.16 | 27.37 | 17.39 | 35.13 | ||||||||||||
1955 | 12.40 | 10.29 | 19.68 | 29.60 | 39.42 | 46.42 | 55.60 | 53.92 | 48.50 | 36.65 | 18.85 | 21.45 | 32.73 | |||||||||||||
1956 | 18.95 | 13.53 | 20.13 | a | 30.68 | 41.61 | 51.32 | 51.69 | 50.50 | 48.10 | 37.18 | 18.17 | 19.50 | 33.45 | ||||||||||||
1957 | 12.23 | 22.07 | 19.48 | 26.20 | 38.13 | 47.48 | 54.19 | 52.74 | 43.93 | 36.81 | 20.09 | a | 21.56 | 32.91 | ||||||||||||
1958 | 18.17 | a | 24.86 | 18.37 | 30.67 | 42.95 | 50.00 | 53.97 | 54.18 | 47.15 | 37.69 | 28.52 | 23.84 | 35.86 | ||||||||||||
1959 | 16.89 | 17.84 | 20.56 | 29.88 | 39.16 | 52.24 | a | 53.81 | 53.50 | 44.12 | 34.78 | a | 26.14 | a | 22.77 | 34.31 | ||||||||||
1960 | 15.08 | 10.66 | 24.53 | 33.63 | 40.85 | 49.85 | 53.73 | 52.97 | 47.77 | 36.92 | a | 26.40 | 17.40 | 34.15 | ||||||||||||
1961 | 19.05 | 20.20 | 22.94 | 27.95 | 41.08 | 50.45 | 53.69 | 53.15 | 40.67 | a | 37.02 | 20.75 | 13.94 | 33.41 | ||||||||||||
1962 | 14.33 | a | 21.11 | 19.60 | a | 34.10 | 42.13 | 47.47 | 52.60 | 51.95 | 46.55 | 39.63 | 30.15 | 21.60 | 35.10 | |||||||||||
1963 | 11.32 | a | 22.45 | 22.03 | 30.20 | 42.76 | 48.75 | 54.69 | 53.84 | 49.32 | 41.52 | 30.38 | a | 19.42 | 35.56 | |||||||||||
1964 | 13.58 | 10.66 | 16.69 | 28.65 | 40.02 | 46.15 | 57.16 | 51.23 | 45.05 | 38.27 | 25.16 | a | 15.98 | 32.38 | ||||||||||||
1965 | 18.82 | 15.45 | 11.52 | 31.10 | 38.12 | a | 47.90 | 53.13 | 49.79 | 40.00 | 40.27 | a | 29.62 | 21.40 | 33.09 | |||||||||||
1966 | 14.19 | 12.39 | 25.63 | 30.98 | 41.74 | 47.68 | 57.56 | 52.56 | 47.52 | 36.63 | d | 30.33 | d | 17.34 | 34.55 | |||||||||||
1967 | 18.76 | b | 18.35 | a | 26.97 | b | 31.63 | 38.05 | 46.03 | 55.19 | 52.88 | a | 46.37 | 39.03 | 26.85 | 14.16 | b | 34.52 | ||||||||
1968 | 20.90 | a | 20.57 | 25.12 | c | 24.60 | 36.15 | 51.17 | 55.06 | 51.68 | a | 44.72 | 39.22 | a | 20.37 | 16.78 | a | 33.86 | ||||||||
1969 | 21.97 | 18.98 | 17.00 | 35.14 | a | 44.35 | a | 44.73 | 57.34 | 56.27 | 49.43 | 29.10 | a | 24.13 | 19.03 | 34.79 | ||||||||||
1970 | 17.16 | 21.88 | 19.61 | 24.45 | 39.95 | 47.88 | 54.81 | 56.45 | b | 44.40 | 29.79 | 25.02 | 18.68 | 33.34 | ||||||||||||
1971 | 18.23 | c | 15.59 | 21.24 | 32.22 | 36.79 | 49.48 | 54.12 | c | 53.29 | 43.91 | b | 37.27 | a | 25.87 | 14.85 | a | 33.57 | ||||||||
1972 | 15.37 | a | 21.23 | a | 29.63 | 34.15 | 40.73 | a | 51.80 | b | 54.23 | a | 52.48 | 47.38 | 37.15 | a | 19.65 | 16.39 | 35.02 | |||||||
1973 | 15.77 | 15.79 | 22.16 | b | 24.89 | b | 37.67 | e | 48.93 | 53.24 | b | 54.28 | b | 43.67 | d | 37.59 | b | 24.88 | a | 17.85 | d | 33.06 | ||||
1974 | 12.75 | a | 15.19 | a | 25.27 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.33 | ----- | z | ----- | z | ----- | z | 24.09 | i | |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.12 | 59.47 | 54.57 | a | 49.09 | b | 39.22 | a | 25.35 | 21.57 | a | 43.34 | e | |||
1978 | 19.30 | c | 22.09 | a | 29.60 | 34.68 | ----- | z | ----- | z | 56.57 | p | 52.58 | 46.30 | 38.05 | 25.18 | 10.45 | 30.92 | c | |||||||
1979 | 7.25 | a | 18.69 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.97 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 15.22 | 17.24 | 21.49 | 30.20 | 39.44 | 48.44 | 54.40 | 52.72 | 45.41 | 36.95 | 24.48 | 18.07 | 33.99 | |||||||||||||
S.D. | 4.34 | 4.18 | 4.44 | 3.71 | 2.72 | 2.44 | 2.18 | 3.06 | 2.95 | 3.21 | 3.71 | 3.81 | 1.22 | |||||||||||||
SKEW | -0.48 | -0.36 | 0.05 | -0.00 | 0.01 | 0.08 | 0.08 | 1.66 | -0.96 | -0.80 | -0.38 | -0.59 | -0.31 | |||||||||||||
MAX | 22.92 | 24.86 | 29.63 | 37.55 | 45.60 | 54.12 | 59.47 | 67.44 | 49.43 | 43.89 | 30.53 | 25.55 | 36.73 | |||||||||||||
MIN | 5.13 | 7.59 | 11.52 | 21.17 | 34.17 | 43.30 | 49.94 | 44.63 | 35.17 | 27.71 | 15.96 | 5.78 | 30.74 | |||||||||||||
YRS | 52 | 55 | 56 | 57 | 50 | 56 | 52 | 56 | 57 | 54 | 54 | 55 | 38 |