YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1929 | ----- | z | ----- | z | ----- | z | 48.14 | b | 55.02 | e | 65.38 | b | 74.82 | f | 71.47 | a | 57.02 | c | 49.52 | d | 26.72 | 14.00 | e | 48.41 | d | |
1930 | 3.17 | b | 27.98 | c | 31.41 | d | 48.54 | g | 56.87 | a | 67.21 | b | 75.35 | a | 74.46 | g | 61.57 | g | 47.65 | e | 33.19 | c | 23.04 | c | 40.65 | c |
1931 | 25.18 | f | 30.19 | d | 31.93 | b | 50.30 | e | 57.95 | i | 73.50 | f | 75.83 | a | 69.43 | c | 67.41 | b | 51.35 | 35.43 | b | 24.68 | 48.51 | c | ||
1932 | 13.43 | c | 18.37 | c | 20.93 | b | 45.43 | a | 59.84 | 70.59 | a | 74.73 | a | 71.31 | 59.91 | a | 42.72 | a | 27.05 | 15.86 | c | 43.35 | ||||
1933 | 13.74 | d | 10.81 | d | 31.65 | a | 44.83 | l | 58.02 | a | 74.58 | 73.63 | 68.48 | a | 62.98 | 43.65 | a | 26.22 | a | 12.39 | 43.29 | a | ||||
1934 | 18.63 | e | 19.75 | b | 27.27 | a | 45.19 | a | 68.02 | b | 69.33 | 73.97 | 68.97 | 54.80 | 51.05 | 36.52 | c | 14.02 | e | 45.63 | ||||||
1935 | 6.20 | d | 25.57 | e | 31.83 | d | 40.47 | 53.02 | 63.67 | 76.44 | 69.42 | 59.95 | a | 44.48 | 19.68 | b | 13.74 | b | 42.04 | |||||||
1936 | -2.65 | h | -5.15 | e | 26.83 | b | 36.33 | 61.68 | 65.83 | 79.20 | c | 71.21 | 62.08 | 40.68 | c | 26.19 | d | 19.42 | g | 46.49 | b | |||||
1937 | -4.05 | b | 7.31 | d | 24.35 | 41.08 | 57.19 | 64.55 | 72.67 | a | 74.32 | 58.40 | a | 44.38 | c | 27.88 | b | 11.62 | b | 39.97 | ||||||
1938 | 8.05 | a | 12.22 | c | 33.95 | a | 43.66 | a | 52.56 | 64.76 | c | 72.00 | a | 73.68 | a | 62.38 | 53.35 | e | 25.60 | ----- | z | 45.66 | a | |||
1939 | 14.42 | g | 3.46 | o | 22.33 | p | 39.26 | a | 61.73 | 65.02 | a | 73.03 | 68.82 | c | 59.41 | a | 43.48 | d | 35.45 | b | 23.79 | e | 52.22 | c | ||
1940 | 2.27 | c | 17.52 | c | 23.28 | f | 41.96 | c | 56.92 | f | 65.41 | a | 73.70 | a | 68.66 | b | 62.93 | b | 52.95 | 26.48 | b | 21.50 | b | 43.34 | b | |
1941 | 13.22 | o | 10.75 | j | 25.10 | j | 46.80 | 61.70 | a | 68.34 | a | 74.10 | a | 69.61 | 59.02 | b | 47.52 | a | 32.45 | 23.79 | b | 53.70 | c | |||
1942 | 20.45 | a | 16.04 | 33.86 | b | 47.57 | a | 52.44 | 63.52 | 69.32 | 68.50 | a | 54.22 | 48.42 | e | 30.12 | f | 8.40 | 43.88 | a | ||||||
1943 | 2.62 | f | 14.04 | a | 18.15 | a | 44.71 | a | 51.27 | 64.92 | 73.00 | 68.89 | 55.70 | 48.21 | 29.15 | 21.28 | a | 44.48 | a | |||||||
1944 | 23.13 | 13.10 | c | 21.10 | b | 39.10 | 58.37 | a | 66.83 | 69.23 | 67.63 | 58.05 | 47.77 | 33.12 | 16.48 | a | 42.83 | |||||||||
1945 | 14.46 | c | 14.67 | e | 36.31 | b | 39.55 | b | 49.10 | a | 60.76 | a | 69.63 | 68.18 | 55.81 | a | 46.22 | b | 27.36 | e | 9.87 | d | 40.99 | |||
1946 | 11.96 | c | 9.46 | 36.59 | d | 47.88 | 52.98 | c | 65.72 | 71.40 | 67.08 | a | 56.66 | a | 43.53 | a | 29.38 | e | 15.52 | e | 42.35 | |||||
1947 | 19.81 | g | 11.41 | e | 26.34 | c | 39.94 | c | 50.88 | a | 62.16 | a | 72.21 | 75.30 | a | 60.75 | b | 54.11 | 24.38 | d | 14.72 | f | 47.75 | b | ||
1948 | 5.18 | f | 8.54 | f | 21.29 | b | 44.97 | a | ----- | z | 64.27 | 72.82 | a | 70.02 | 66.03 | a | 46.39 | 32.12 | 15.12 | a | 48.11 | c | ||||
1949 | 4.88 | a | 2.85 | b | 23.40 | b | 46.19 | a | 58.12 | b | 66.90 | 72.23 | 73.66 | 56.02 | 47.00 | a | 35.87 | 12.60 | 41.64 | |||||||
1950 | -6.58 | e | 7.80 | f | 20.58 | 33.68 | 51.36 | f | 66.86 | b | 68.32 | a | 65.34 | 61.05 | 48.31 | 24.17 | 9.37 | e | 39.11 | b | ||||||
1951 | 5.38 | a | 13.74 | g | 16.15 | a | 42.27 | 60.00 | c | 61.60 | a | 69.29 | 65.84 | 54.42 | 44.18 | 20.33 | d | 8.37 | 40.71 | a | ||||||
1952 | 3.39 | 16.93 | b | 17.30 | c | 45.67 | c | 57.21 | l | 66.83 | i | 71.29 | 69.25 | c | 62.07 | 41.86 | c | 32.00 | a | 18.94 | 37.87 | b | ||||
1953 | 11.62 | b | 16.33 | a | 28.40 | a | 38.17 | a | 54.87 | 66.03 | 71.10 | 70.25 | a | 58.36 | a | 52.95 | 35.52 | a | 18.46 | c | 43.51 | |||||
1954 | 1.02 | b | 28.17 | a | 25.32 | 41.47 | a | 49.81 | 64.02 | b | 71.22 | d | 67.87 | a | 57.28 | a | 44.39 | c | 37.29 | f | 20.90 | b | 42.86 | a | ||
1955 | 13.13 | 9.38 | 18.85 | d | 52.20 | g | 63.13 | e | 64.43 | 74.18 | 72.20 | a | 58.38 | a | 47.81 | 20.48 | 5.89 | 40.71 | a | |||||||
1956 | 7.68 | 8.78 | b | 20.63 | 34.74 | c | 54.03 | 69.63 | 67.81 | 68.50 | 54.77 | 50.98 | a | 29.70 | 20.05 | a | 40.61 | |||||||||
1957 | 4.50 | a | 14.11 | 27.29 | 42.24 | a | 54.53 | 63.13 | 74.19 | 67.02 | 55.78 | 45.57 | a | 30.86 | a | 22.48 | 41.81 | |||||||||
1958 | 17.73 | 11.02 | 28.71 | 44.12 | 57.30 | a | ----- | z | 66.62 | c | 70.65 | d | 59.26 | e | 49.04 | h | 33.09 | n | 11.75 | g | 44.43 | d | ||||
1959 | 6.76 | b | 9.73 | 31.10 | 42.55 | b | 52.94 | d | 68.22 | a | 70.76 | 71.53 | a | 58.53 | a | 40.32 | 20.92 | 27.29 | 41.72 | |||||||
1960 | 9.79 | 12.38 | 14.85 | 41.43 | 55.65 | 63.57 | 70.97 | 69.45 | a | 59.82 | 47.52 | 31.72 | 11.71 | 40.74 | ||||||||||||
1961 | 11.47 | a | 20.17 | a | 33.29 | 36.57 | c | 50.89 | 68.02 | 69.15 | 72.16 | 56.55 | a | 45.90 | a | 30.18 | 10.23 | 42.05 | ||||||||
1962 | 6.18 | 9.30 | a | 20.98 | a | 38.27 | 55.73 | 64.02 | 67.00 | g | 69.58 | m | 54.98 | e | 50.47 | b | 34.75 | 18.19 | 35.29 | b | ||||||
1963 | 1.58 | a | 10.98 | a | 30.81 | 44.90 | 53.76 | 68.05 | 71.19 | 68.81 | 60.53 | 56.63 | 35.32 | 8.60 | a | 42.60 | ||||||||||
1964 | 15.97 | 18.95 | 19.92 | 42.47 | a | 58.87 | 66.10 | 73.76 | 66.23 | a | 55.75 | 47.30 | h | 31.55 | a | 6.84 | 41.49 | a | ||||||||
1965 | 4.45 | b | 5.69 | d | 15.47 | 40.78 | 55.87 | 64.70 | 69.30 | a | 67.47 | 48.53 | a | 49.05 | a | 28.60 | 23.82 | 39.48 | ||||||||
1966 | -3.66 | 7.19 | a | 31.41 | d | 37.43 | 51.87 | a | 66.07 | b | 75.21 | 66.27 | 59.17 | 46.18 | a | 24.05 | a | 14.24 | 39.62 | |||||||
1967 | 10.63 | 5.96 | 28.05 | 39.26 | a | 49.55 | 63.28 | a | 68.52 | a | 67.21 | 59.20 | 43.75 | a | 30.03 | 18.15 | 40.30 | |||||||||
1968 | 8.90 | 10.55 | 35.16 | 42.21 | a | 51.65 | a | 64.62 | 69.57 | a | 68.02 | 58.48 | 46.10 | 31.00 | 10.85 | 41.43 | ||||||||||
1969 | 1.08 | 13.91 | 17.63 | 42.68 | 56.20 | a | 59.33 | a | 69.23 | a | 72.92 | a | 60.10 | a | 41.26 | 30.91 | a | 17.81 | 40.26 | |||||||
1970 | 1.58 | 13.46 | 19.89 | 39.02 | 53.92 | a | 68.40 | 73.06 | 70.45 | a | 59.45 | 46.47 | 26.77 | 11.42 | 40.32 | |||||||||||
1971 | 2.68 | 13.04 | a | 26.15 | 45.32 | 54.02 | 68.22 | 66.13 | a | 68.98 | 58.60 | 49.27 | 28.59 | b | 11.76 | 41.06 | ||||||||||
1972 | 4.39 | 6.57 | 24.27 | a | 40.40 | 58.47 | a | 66.30 | 71.07 | a | 69.52 | a | 55.63 | 43.85 | a | 29.00 | 6.55 | 39.67 | ||||||||
1973 | 13.23 | 17.41 | 36.08 | 43.12 | 55.58 | 67.76 | c | ----- | z | 73.23 | a | ----- | z | 51.32 | c | 29.50 | 15.05 | 40.23 | b | |||||||
1974 | 6.58 | a | 12.46 | 24.62 | a | 42.90 | 51.74 | 65.60 | 75.24 | 67.58 | 56.02 | 48.31 | b | 33.34 | a | 24.18 | a | 42.38 | ||||||||
1975 | 13.58 | 10.00 | b | 19.53 | a | 35.29 | d | 58.87 | 67.41 | a | 77.36 | b | 68.81 | 56.10 | a | 50.13 | a | 35.21 | a | 17.58 | 42.49 | |||||
1976 | 10.97 | a | 24.83 | b | 26.28 | a | 48.80 | 56.58 | a | 70.43 | a | 73.65 | a | 73.61 | 59.30 | 42.13 | 25.87 | 10.74 | b | 43.60 | ||||||
1977 | -1.44 | 17.77 | f | 30.85 | a | 49.12 | 62.57 | b | 64.40 | 71.24 | 62.17 | a | 56.83 | a | 46.03 | a | 26.96 | b | 9.66 | 43.49 | a | |||||
1978 | -1.19 | 5.54 | 23.87 | 41.80 | 58.08 | a | 65.29 | a | 69.74 | 68.90 | a | 62.85 | 44.26 | 24.83 | 10.34 | b | 39.53 | |||||||||
1979 | -3.19 | b | -1.38 | 19.92 | 35.52 | 49.97 | 63.67 | 70.87 | 66.35 | 61.35 | 44.98 | a | 27.47 | a | 22.28 | b | 38.15 | |||||||||
1980 | 10.35 | 11.40 | 20.59 | b | 49.78 | 61.17 | a | 66.02 | 72.38 | a | 67.23 | 57.50 | 43.63 | 35.28 | 14.98 | 42.53 | ||||||||||
1981 | 12.80 | a | 21.18 | 34.77 | 47.40 | a | 56.29 | 64.23 | 71.90 | 70.34 | 59.80 | 44.60 | 36.13 | 11.47 | 44.24 | |||||||||||
1982 | -6.19 | 9.27 | 25.89 | c | 41.84 | a | 58.44 | 61.65 | 72.90 | 69.18 | a | 57.84 | a | 45.35 | a | 25.22 | 21.87 | 40.27 | ||||||||
1983 | 17.53 | 21.80 | a | 29.56 | 40.93 | 52.34 | c | 66.48 | 76.13 | 75.47 | 59.23 | 45.55 | 31.83 | 0.76 | f | 46.99 | a | |||||||||
1984 | 11.28 | b | 26.61 | a | 21.08 | 44.88 | 54.44 | 66.77 | 71.23 | 72.89 | 54.45 | 46.68 | a | 30.25 | b | 11.55 | 42.67 | |||||||||
1985 | 4.67 | b | 10.67 | d | 34.28 | a | 47.45 | 61.26 | 61.90 | a | 70.77 | c | 65.23 | 55.66 | a | 44.63 | 17.89 | b | 5.21 | b | 39.97 | |||||
1986 | 14.73 | 10.48 | a | 31.45 | a | 43.47 | a | 57.45 | a | 68.55 | 72.03 | 65.52 | a | 56.38 | a | 44.02 | b | 24.97 | a | 23.37 | 42.70 | |||||
1987 | 19.75 | c | 28.98 | a | 31.15 | 51.53 | 61.64 | b | 70.07 | 73.00 | c | 67.53 | b | 59.80 | c | 42.57 | c | 33.37 | c | 22.37 | d | 46.81 | ||||
1988 | 6.86 | f | 8.77 | g | 29.65 | e | 44.38 | a | 62.64 | b | 73.82 | 74.30 | a | 70.85 | a | 58.48 | a | 42.76 | 27.32 | 16.17 | a | 50.04 | b | |||
1989 | 13.77 | 3.41 | a | 20.42 | a | 40.87 | 57.47 | 64.40 | 74.67 | a | 69.05 | 57.67 | a | 47.11 | 26.16 | a | 6.50 | a | 40.12 | |||||||
1990 | 22.31 | 17.80 | 31.48 | a | 42.24 | a | 53.87 | 66.55 | 69.48 | 68.95 | 61.85 | 44.40 | 33.17 | 12.57 | a | 43.72 | ||||||||||
1991 | 9.05 | a | 23.09 | a | 29.18 | 46.52 | 59.52 | 69.30 | 70.63 | 72.13 | a | 58.48 | 43.47 | 23.02 | a | 20.12 | e | 43.71 | ||||||||
1992 | 19.38 | j | 23.95 | i | 32.87 | h | 40.06 | f | 58.58 | e | 63.36 | b | 64.10 | 64.47 | b | 57.00 | c | 46.66 | c | 26.38 | b | 13.48 | i | 54.36 | e | |
1993 | 6.50 | f | 10.43 | e | 25.26 | d | 41.33 | f | 56.09 | d | 61.79 | a | 66.73 | c | 68.08 | e | 53.67 | g | ----- | z | ----- | z | ----- | z | 48.06 | f |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 8.23 | 13.80 | 26.26 | 42.70 | 56.27 | 65.87 | 71.85 | 69.34 | 58.43 | 46.55 | 29.03 | 15.44 | 41.76 | |||||||||||||
S.D. | 7.28 | 7.50 | 5.97 | 4.08 | 4.02 | 2.89 | 2.85 | 2.69 | 3.04 | 3.48 | 4.57 | 5.78 | 1.82 | |||||||||||||
SKEW | -0.04 | 0.23 | -0.07 | -0.05 | 0.34 | 0.55 | -0.12 | 0.16 | 0.13 | 0.65 | -0.29 | 0.14 | 0.53 | |||||||||||||
MAX | 23.13 | 30.19 | 36.59 | 51.53 | 68.02 | 74.58 | 79.20 | 75.47 | 67.41 | 56.63 | 36.52 | 27.29 | 46.81 | |||||||||||||
MIN | -6.58 | -5.15 | 14.85 | 33.68 | 49.10 | 59.33 | 64.10 | 62.17 | 48.53 | 40.32 | 17.89 | 5.21 | 38.15 | |||||||||||||
YRS | 54 | 56 | 60 | 60 | 60 | 62 | 62 | 63 | 62 | 62 | 61 | 58 | 38 |