YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1915 | ----- | z | 26.00 | m | 31.94 | 37.31 | d | 43.11 | d | 42.87 | 52.13 | a | 52.53 | a | 39.40 | 32.23 | 20.60 | ----- | z | 39.12 | c | |||||
1916 | ----- | z | 16.62 | 27.52 | 33.83 | 37.97 | 44.60 | 47.10 | 47.83 | a | 39.73 | 27.10 | 23.53 | k | 7.71 | 33.00 | b | |||||||||
1917 | 6.57 | a | 14.14 | 17.94 | 32.57 | 40.00 | 41.27 | 47.26 | 47.55 | 39.83 | 32.35 | 28.47 | 17.52 | 30.45 | ||||||||||||
1918 | 20.23 | e | 15.43 | 29.23 | 30.67 | 35.48 | 44.90 | 51.87 | 46.13 | 42.13 | 34.19 | 24.93 | 19.06 | 32.86 | ||||||||||||
1919 | 18.23 | 18.93 | 25.48 | b | 31.73 | 38.81 | 39.97 | 48.74 | 48.00 | 41.17 | 27.87 | 22.80 | 11.03 | 31.06 | ||||||||||||
1920 | 11.93 | b | 20.76 | 27.32 | 30.10 | a | 35.74 | 44.00 | 52.74 | 48.45 | b | 43.23 | 33.83 | a | 27.45 | a | 24.35 | 33.33 | ||||||||
1921 | 16.68 | 21.15 | b | 29.29 | 29.97 | a | 38.19 | 47.93 | a | 46.42 | 47.13 | 36.70 | 32.90 | 22.87 | 14.97 | 32.02 | ||||||||||
1922 | 3.40 | a | 4.32 | 21.42 | 31.90 | 37.45 | 47.10 | 50.68 | 50.16 | 42.43 | 35.94 | 27.57 | 9.84 | 30.18 | ||||||||||||
1923 | 20.39 | 11.50 | 25.87 | 34.43 | 40.00 | 48.10 | 52.48 | 51.23 | 41.63 | 34.71 | 26.77 | 19.00 | 33.84 | |||||||||||||
1924 | 8.47 | a | 28.79 | 27.23 | 30.11 | b | 41.84 | 45.41 | a | 50.32 | 48.65 | 42.37 | 34.39 | 26.28 | a | 15.93 | c | 33.31 | ||||||||
1925 | 12.48 | 28.61 | 29.52 | 36.40 | 43.03 | a | 45.47 | 52.65 | 46.87 | 41.23 | 30.55 | 24.27 | h | 29.03 | 35.99 | a | ||||||||||
1926 | 22.94 | 28.25 | 29.61 | 35.31 | n | 35.44 | v | 47.97 | a | ----- | z | 47.61 | 37.63 | 35.33 | a | 28.82 | b | 18.41 | b | 32.95 | c | |||||
1927 | 13.96 | e | 20.41 | a | 25.86 | b | 31.97 | 38.23 | 48.67 | 49.35 | 50.65 | 43.50 | 35.71 | 28.93 | 12.76 | f | 35.20 | a | ||||||||
1928 | 16.17 | a | 21.97 | 29.84 | 31.30 | 40.61 | 47.59 | a | 52.81 | 46.97 | 40.17 | a | 31.90 | 23.62 | a | 20.21 | b | 33.60 | ||||||||
1929 | 4.79 | c | 1.81 | a | 28.25 | c | 29.90 | 38.43 | a | 48.00 | 46.81 | 48.23 | 40.13 | 32.94 | 17.23 | 22.10 | a | 29.88 | ||||||||
1930 | -3.62 | e | 22.15 | a | 28.84 | 34.97 | 41.29 | 44.97 | 52.00 | 52.52 | 44.37 | 33.06 | 23.04 | d | 20.52 | 32.84 | ||||||||||
1931 | 24.22 | h | 16.85 | a | 29.30 | a | 33.43 | 40.90 | 46.73 | 50.23 | 46.42 | 41.21 | a | 32.28 | b | 22.79 | a | 20.04 | c | 34.56 | a | |||||
1932 | 11.48 | 12.61 | a | 29.03 | 36.76 | a | 39.65 | 47.60 | 46.29 | 50.55 | 39.41 | a | 36.70 | a | 32.34 | a | 16.48 | 33.24 | ||||||||
1933 | 18.20 | a | 8.50 | b | 28.97 | 32.23 | 37.32 | 43.10 | 48.13 | 48.32 | 39.00 | 33.35 | 29.97 | 27.26 | 32.86 | |||||||||||
1934 | 25.77 | 27.57 | 30.83 | b | 38.97 | 41.35 | 46.93 | 49.13 | 50.42 | 40.10 | 37.90 | 33.28 | a | 22.13 | a | 37.03 | ||||||||||
1935 | 18.48 | 23.75 | 28.10 | 30.97 | 37.81 | 44.63 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.62 | f | ||||||
1936 | 20.45 | b | -1.19 | b | 26.45 | 35.70 | 45.61 | 50.50 | 48.35 | 47.97 | 40.67 | 33.16 | 18.21 | a | 24.90 | 32.57 | ||||||||||
1937 | -5.00 | 11.46 | b | 28.55 | b | 32.20 | ----- | z | 50.00 | a | 50.77 | 49.37 | a | 43.10 | 36.97 | 29.80 | 29.50 | a | 32.43 | a | ||||||
1938 | 28.27 | a | 26.04 | 29.19 | 37.87 | 39.13 | 48.10 | a | 53.42 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.43 | e | |||||
1939 | 29.58 | 19.85 | a | 27.35 | 33.93 | 40.45 | 46.63 | 51.16 | 49.74 | 42.34 | a | 33.94 | 25.73 | 30.42 | 35.93 | |||||||||||
1940 | 21.81 | 24.52 | 32.87 | 38.59 | a | 43.29 | 47.30 | 51.71 | 46.71 | 49.40 | 40.40 | f | 23.86 | a | 22.43 | a | 36.59 | a | ||||||||
1941 | 25.19 | 24.46 | b | 31.35 | 36.28 | a | 40.37 | a | 49.07 | 53.39 | 51.57 | a | 41.93 | 33.13 | 26.87 | 24.48 | 36.51 | |||||||||
1942 | 13.13 | 25.52 | a | 27.32 | 34.93 | b | 40.87 | 46.15 | c | 51.42 | 50.48 | 41.97 | 32.81 | 23.08 | d | 20.71 | 34.03 | |||||||||
1943 | 7.20 | a | 19.85 | a | 22.21 | c | 34.70 | 34.77 | a | 44.20 | 47.94 | 49.07 | b | 44.10 | 46.92 | s | 28.80 | 20.10 | 32.08 | a | ||||||
1944 | 15.85 | d | 18.46 | e | 24.89 | c | 36.54 | d | 42.87 | ----- | z | 52.81 | 50.53 | a | 48.04 | d | 35.94 | 39.17 | x | 17.83 | g | 36.21 | c | |||
1945 | 23.42 | 26.32 | 29.06 | 28.80 | j | 40.16 | 43.71 | f | 59.78 | d | 57.31 | b | 42.80 | 33.97 | 24.24 | e | 22.72 | b | 35.98 | b | ||||||
1946 | 19.26 | 19.79 | 28.50 | c | 32.24 | i | 39.46 | c | 44.16 | k | 49.79 | b | 49.93 | a | 44.06 | n | 28.76 | j | 21.15 | d | 21.15 | d | 31.13 | d | ||
1947 | 12.83 | a | 20.18 | 27.97 | 33.00 | 43.31 | b | 46.00 | b | 60.48 | f | ----- | z | ----- | z | 41.00 | c | 26.54 | b | 22.23 | a | 30.34 | c | |||
1948 | 16.29 | 19.15 | c | 24.32 | f | 31.41 | c | 35.75 | k | 50.47 | 46.97 | a | 48.87 | 40.70 | c | 30.97 | b | 26.52 | e | 9.48 | 32.08 | b | ||||
1949 | -7.42 | 9.71 | 26.69 | b | 33.14 | b | 40.11 | c | 40.48 | a | 46.10 | 46.16 | 41.24 | e | 29.96 | g | 31.10 | a | 17.83 | b | 29.56 | a | ||||
1950 | -5.97 | 17.71 | 25.67 | a | 30.68 | b | 35.57 | a | 44.10 | a | 48.32 | 45.97 | 39.59 | a | 35.45 | b | 26.89 | c | 24.92 | e | 30.74 | |||||
1951 | 16.22 | d | 18.78 | a | 20.14 | c | 28.96 | b | 39.87 | 43.63 | 46.83 | a | 48.17 | b | 41.40 | 35.14 | c | 26.32 | b | 15.70 | d | 31.77 | ||||
1952 | 10.16 | f | 15.83 | 22.39 | 31.03 | a | 36.13 | 43.10 | 49.97 | a | 48.71 | 43.77 | 33.94 | 24.92 | e | 25.65 | e | 34.13 | a | |||||||
1953 | 29.13 | 26.32 | 28.43 | c | 33.97 | 37.90 | a | 42.80 | 46.63 | d | 47.69 | b | 39.30 | 33.00 | b | 26.88 | e | 28.04 | g | 35.64 | a | |||||
1954 | 16.67 | a | 26.52 | a | 24.29 | c | 30.70 | 39.38 | b | 43.53 | 48.00 | 46.74 | 39.03 | a | 29.62 | g | 33.53 | 19.46 | e | 33.44 | a | |||||
1955 | 20.32 | 14.54 | b | 19.90 | 29.81 | i | 37.81 | 44.96 | b | 51.27 | a | 45.58 | 41.60 | 34.65 | 20.63 | 15.77 | 31.55 | a | ||||||||
1956 | 20.40 | a | 12.17 | 24.03 | 34.53 | 41.23 | 44.37 | 49.39 | 50.29 | 41.03 | 33.46 | e | 22.42 | d | 21.55 | b | 32.91 | |||||||||
1957 | 1.42 | 14.94 | j | 28.32 | 35.20 | 45.32 | 44.20 | 44.52 | 43.23 | 42.13 | 36.97 | 25.03 | 26.10 | a | 33.86 | a | ||||||||||
1958 | 26.71 | 33.21 | 29.19 | 34.17 | 40.74 | 46.96 | c | 52.03 | 47.82 | c | 38.48 | e | 31.16 | 24.47 | 25.39 | 35.86 | ||||||||||
1959 | 21.16 | 19.43 | 26.94 | 33.57 | 38.29 | 45.23 | 48.93 | a | 45.35 | 44.23 | 34.13 | 22.23 | 23.74 | 33.60 | ||||||||||||
1960 | 12.84 | 23.41 | 27.19 | 34.10 | 37.23 | 47.47 | 60.23 | 47.48 | b | 39.50 | d | 31.60 | a | 25.03 | 19.00 | 33.76 | ||||||||||
1961 | 22.48 | 29.39 | 29.00 | 32.13 | 35.74 | 46.50 | 51.48 | 51.55 | 36.90 | 28.63 | a | 17.80 | 17.71 | 33.28 | ||||||||||||
1962 | 11.87 | 24.46 | 25.19 | 32.79 | b | 37.19 | 42.47 | 47.26 | 48.23 | 41.63 | 34.68 | 32.20 | 27.90 | 33.82 | ||||||||||||
1963 | 14.87 | 26.64 | 29.10 | 34.80 | 38.68 | 44.70 | 45.35 | 46.45 | 47.25 | j | 36.68 | 28.37 | 20.74 | 33.31 | a | |||||||||||
1964 | 19.81 | 16.83 | 23.42 | 28.80 | 37.58 | 47.27 | d | 50.65 | 46.74 | 36.22 | c | 31.63 | a | 26.43 | i | 15.71 | g | 33.89 | b | |||||||
1965 | 19.88 | f | 17.85 | b | 19.68 | 33.08 | e | 38.11 | c | 44.73 | 50.03 | 52.68 | 39.07 | b | 34.48 | f | 32.63 | 22.77 | a | 35.06 | b | |||||
1966 | 16.15 | k | 20.74 | i | 27.55 | 31.22 | g | 38.47 | l | 45.21 | b | 48.66 | b | 49.77 | 47.20 | 31.88 | n | 29.17 | g | 26.50 | c | 40.82 | f | |||
1967 | 25.50 | g | 26.04 | 27.54 | c | 31.87 | g | 38.11 | d | 49.38 | a | 49.03 | 51.00 | 45.70 | 35.10 | k | 27.77 | h | 16.23 | e | 37.88 | d | ||||
1968 | 19.23 | a | 22.52 | 29.30 | d | 30.58 | k | 38.77 | i | 44.19 | d | 51.96 | c | 47.86 | c | 43.52 | a | 32.79 | b | 29.70 | 19.38 | g | 35.67 | c | ||
1969 | 5.47 | a | 15.82 | 23.81 | d | 32.91 | h | 40.06 | m | 50.39 | g | 47.53 | a | 44.67 | a | 44.07 | a | 31.00 | j | 26.42 | r | 24.37 | l | 30.23 | f | |
1970 | 17.95 | k | 23.53 | i | 26.00 | l | 29.76 | i | 36.58 | l | 48.69 | d | 51.78 | d | 47.19 | 36.74 | g | 27.00 | r | 18.00 | m | 14.65 | 40.58 | h | ||
1971 | 17.23 | 22.86 | 26.94 | ----- | z | ----- | z | 44.41 | c | 50.33 | a | 53.71 | 40.52 | a | 28.38 | o | 27.26 | c | 14.39 | 33.07 | c | |||||
1972 | 11.45 | 21.62 | 29.23 | 29.57 | 43.67 | a | 50.00 | i | 50.07 | b | 53.43 | h | 39.04 | e | 29.25 | k | 29.46 | b | 13.19 | j | 31.76 | d | ||||
1973 | 16.83 | h | 21.79 | d | 28.54 | e | 31.40 | j | 39.58 | g | 45.79 | a | 49.61 | 45.06 | 40.54 | b | 32.35 | h | 28.09 | h | 27.89 | m | 38.56 | f | ||
1974 | 16.71 | j | 27.89 | i | 28.67 | j | 37.00 | f | 38.45 | 46.83 | f | 50.21 | b | 49.00 | 41.57 | 30.97 | a | 30.25 | j | 24.75 | k | 42.04 | g | |||
1975 | 14.20 | k | 15.56 | j | 22.29 | j | 31.00 | h | 38.88 | f | 44.90 | a | 55.77 | 49.06 | 42.13 | 37.32 | 26.12 | d | 19.86 | j | 42.55 | f | ||||
1976 | 21.35 | 24.62 | 23.91 | h | 35.25 | f | 39.90 | b | 43.44 | e | 51.29 | 50.16 | 44.80 | 32.48 | b | 27.32 | h | 19.31 | o | 38.51 | d | |||||
1977 | 12.55 | k | 23.89 | i | 26.83 | h | 32.59 | h | 39.89 | d | 48.67 | c | 50.59 | b | 55.77 | 43.50 | b | 30.39 | m | 23.24 | m | 21.84 | l | 47.68 | g | |
1978 | 19.14 | j | 26.84 | i | 30.43 | h | 37.95 | h | 39.63 | a | 46.00 | 53.30 | a | 51.23 | 45.07 | a | ----- | z | 22.23 | 11.38 | b | 38.41 | e | |||
1979 | 3.67 | a | 19.48 | a | 27.65 | e | 31.52 | a | ----- | z | 46.70 | 54.42 | 53.69 | e | 46.21 | b | 37.50 | c | 23.73 | 27.14 | c | 33.79 | a | |||
1980 | 10.39 | c | 24.66 | 28.13 | 37.73 | 43.39 | 45.50 | 48.93 | c | 46.03 | 40.86 | b | 33.05 | i | 30.88 | n | 23.78 | m | 36.18 | c | ||||||
1981 | 27.30 | k | 21.50 | j | 28.00 | i | 29.64 | h | 40.42 | g | 41.00 | a | 48.16 | 50.93 | c | 37.10 | 30.08 | e | 24.62 | a | 17.93 | a | 35.69 | e | ||
1982 | 10.50 | a | 16.89 | 23.48 | 23.83 | 37.59 | b | 50.77 | 50.90 | a | 51.35 | 42.48 | a | 31.37 | a | 20.86 | b | 20.17 | g | 32.73 | a | |||||
1983 | 24.85 | k | 26.45 | h | 32.00 | f | 29.40 | j | 39.65 | h | 47.32 | b | 49.39 | 53.00 | 39.30 | 34.19 | 34.34 | a | 10.46 | g | 42.92 | f | ||||
1984 | 19.30 | k | 26.00 | j | 31.50 | i | 30.37 | k | 36.40 | f | 44.68 | b | 49.20 | a | 50.29 | 37.14 | a | 28.04 | c | 29.10 | 8.65 | h | 39.74 | f | ||
1985 | 11.76 | j | 9.21 | i | 19.21 | l | 30.79 | a | 41.10 | 44.73 | 52.94 | 47.87 | 40.50 | 33.32 | c | 10.18 | m | 9.21 | q | 41.61 | e | |||||
1986 | 18.06 | n | 17.00 | i | 29.56 | m | 30.85 | j | 37.71 | j | 47.70 | c | 48.27 | a | 52.93 | b | 42.11 | c | 35.45 | b | 28.26 | k | 19.90 | k | 45.29 | g |
1987 | 17.50 | o | 25.16 | i | 33.29 | g | 37.09 | h | 41.20 | k | 47.25 | b | 51.90 | a | 49.50 | a | 43.55 | a | 31.73 | e | 29.00 | q | 18.56 | m | 44.79 | g |
1988 | 17.28 | m | 15.42 | j | 26.70 | h | 37.05 | k | 37.60 | k | 47.00 | d | 48.71 | 48.84 | 42.12 | f | 33.83 | m | 29.56 | n | 20.44 | m | 48.18 | i | ||
1989 | 17.25 | k | 10.93 | m | 25.33 | j | 35.40 | j | 38.41 | i | 48.52 | a | 49.37 | a | 49.48 | b | 40.85 | d | 28.95 | l | 26.62 | q | 17.00 | w | 47.05 | h |
1990 | 21.89 | m | 14.81 | l | 26.90 | k | 33.95 | k | 39.55 | i | 43.75 | n | ----- | z | 50.78 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | 20.06 | o | 33.67 | m | 29.95 | j | 39.57 | i | 45.12 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 14.72 | 19.79 | 26.98 | 33.07 | 39.58 | 45.86 | 50.19 | 49.08 | 41.52 | 33.52 | 26.01 | 20.32 | 33.13 | |||||||||||||
S.D. | 8.82 | 6.78 | 3.10 | 2.88 | 2.46 | 2.40 | 2.83 | 2.60 | 2.64 | 2.65 | 4.01 | 5.36 | 1.84 | |||||||||||||
SKEW | -0.69 | -0.86 | -0.97 | -0.25 | 0.35 | -0.17 | 0.98 | 0.57 | 0.48 | -0.04 | 0.01 | -0.30 | 0.25 | |||||||||||||
MAX | 29.58 | 33.21 | 32.87 | 38.97 | 45.61 | 50.77 | 60.23 | 57.31 | 49.40 | 41.00 | 34.34 | 30.42 | 37.03 | |||||||||||||
MIN | -7.42 | -1.19 | 17.94 | 23.83 | 34.77 | 39.97 | 44.52 | 43.23 | 36.22 | 27.10 | 17.23 | 7.71 | 29.88 | |||||||||||||
YRS | 54 | 59 | 60 | 52 | 57 | 69 | 72 | 71 | 68 | 55 | 55 | 51 | 26 |