YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | 47.45 | 58.55 | a | 68.18 | 68.00 | a | 50.53 | 48.72 | a | 17.62 | b | 9.13 | d | 46.02 | d | |||
1948 | 3.15 | e | 2.26 | 13.90 | e | 35.73 | 54.82 | a | 61.65 | 67.39 | 66.02 | 61.25 | 46.04 | c | 25.62 | b | 4.45 | 36.86 | ||||||||
1949 | -0.47 | a | -3.52 | 16.87 | 41.92 | 53.16 | 60.75 | 65.92 | 68.89 | 53.38 | 40.52 | 31.70 | 2.87 | a | 36.00 | |||||||||||
1950 | -16.68 | 1.52 | 15.03 | 29.17 | 46.24 | 59.13 | 63.16 | 61.11 | 57.14 | a | 43.68 | 17.04 | b | 3.74 | 31.69 | |||||||||||
1951 | -2.92 | 5.43 | 11.32 | 37.00 | 55.80 | a | 57.18 | 66.10 | 61.23 | 50.18 | 39.60 | a | 17.00 | 1.77 | 33.31 | |||||||||||
1952 | -1.73 | 15.16 | 17.71 | 47.23 | 53.52 | 62.32 | 65.35 | 64.10 | 57.78 | 39.00 | 27.77 | b | 13.53 | 38.48 | ||||||||||||
1953 | 4.84 | 12.16 | 21.53 | 33.00 | 50.18 | 59.35 | 63.88 | a | 66.77 | 53.27 | 48.92 | 32.15 | 13.82 | 38.32 | ||||||||||||
1954 | -8.15 | 23.34 | 21.85 | e | 36.77 | 47.58 | 60.62 | 67.63 | 63.37 | 53.15 | 42.27 | 31.62 | 18.85 | 38.24 | ||||||||||||
1955 | 4.44 | 3.77 | 10.56 | 45.48 | 54.73 | 60.57 | 67.89 | d | 65.24 | 50.57 | 41.67 | a | 11.00 | -2.28 | a | 34.47 | ||||||||||
1956 | -0.44 | -1.59 | a | 10.81 | 26.02 | 48.19 | 63.17 | a | 61.05 | 61.08 | 47.32 | 42.48 | b | 22.75 | 6.84 | 32.31 | ||||||||||
1957 | -7.52 | 2.00 | a | 18.03 | 34.50 | 53.90 | 58.17 | 69.69 | b | 62.81 | 50.93 | 41.77 | 24.83 | a | 16.03 | 35.43 | ||||||||||
1958 | 12.13 | 6.39 | a | 24.87 | a | 40.92 | 53.50 | 56.48 | a | 63.77 | a | 64.73 | 56.45 | a | 45.13 | 24.41 | b | 5.08 | 37.82 | |||||||
1959 | -2.60 | 3.62 | 28.81 | 39.62 | 49.13 | 63.35 | 67.74 | 67.06 | 54.43 | a | 34.79 | 17.07 | 20.15 | 36.93 | ||||||||||||
1960 | 2.37 | 6.07 | 11.32 | 37.20 | 53.45 | 60.20 | 69.18 | 66.58 | 57.13 | 43.53 | 25.23 | 8.58 | 36.74 | |||||||||||||
1961 | 3.98 | b | 12.36 | 27.23 | 35.28 | 50.73 | 65.55 | 66.23 | a | 70.05 | 51.78 | 43.27 | 25.45 | 2.42 | 37.86 | |||||||||||
1962 | 0.60 | 0.75 | 16.52 | b | 37.03 | 49.98 | 62.70 | 63.52 | 65.74 | 52.65 | 46.37 | 30.27 | 11.79 | 36.49 | ||||||||||||
1963 | -2.10 | a | 7.27 | 27.95 | 39.55 | 50.27 | 64.18 | 68.71 | 66.63 | 59.03 | 53.52 | 29.08 | 4.63 | 39.06 | ||||||||||||
1964 | 8.82 | 14.98 | 15.00 | 41.98 | 54.79 | 59.79 | a | 68.68 | 59.68 | 50.18 | 43.00 | 23.45 | -2.03 | b | 36.53 | |||||||||||
1965 | -3.92 | 5.16 | 12.21 | 37.42 | 50.16 | 60.45 | 64.10 | 62.90 | 44.85 | 45.02 | 21.57 | 16.02 | 34.66 | |||||||||||||
1966 | -10.16 | 1.77 | 23.89 | q | 32.60 | 47.76 | 61.19 | a | 69.23 | 63.16 | 57.53 | 43.43 | a | 17.32 | 8.88 | a | 35.70 | a | ||||||||
1967 | 5.43 | a | 1.27 | 20.87 | a | 35.03 | 47.85 | 61.00 | 66.50 | 65.42 | 60.68 | e | ----- | z | 13.58 | x | 12.24 | 37.63 | b | |||||||
1968 | 2.10 | a | 7.34 | 30.77 | a | 40.71 | b | 49.85 | 62.53 | 66.85 | a | 61.05 | 54.58 | 43.55 | 27.27 | d | 6.70 | a | 37.78 | |||||||
1969 | -3.97 | 8.61 | e | 8.92 | 43.48 | a | 53.81 | 55.17 | 63.83 | e | 69.19 | 57.33 | a | 36.82 | 25.85 | g | 12.32 | 36.86 | a | |||||||
1970 | -4.15 | 7.70 | c | 22.09 | n | 33.40 | f | 49.30 | h | 66.74 | c | 71.02 | f | 68.97 | p | 52.57 | o | 41.08 | k | 24.91 | h | 3.12 | j | 23.43 | i | |
1971 | -7.28 | h | 12.67 | a | 17.91 | d | ----- | z | ----- | z | 64.03 | k | 62.89 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.29 | j |
1972 | -4.00 | t | -2.30 | n | 24.03 | n | 39.21 | f | 58.69 | m | 57.88 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | 8.31 | b | 11.25 | 32.60 | 38.04 | e | 52.76 | b | 61.75 | 65.45 | 67.90 | a | 52.48 | d | 46.72 | a | 18.30 | 6.02 | a | 38.46 | ||||||
1974 | -4.84 | 2.32 | 11.90 | b | 35.83 | 47.30 | a | 62.53 | 70.07 | b | 60.17 | e | 49.90 | 41.80 | i | 25.68 | 15.57 | a | 34.22 | a | ||||||
1975 | 5.41 | b | 2.87 | a | 9.16 | l | 33.87 | 53.75 | a | 63.02 | e | 70.33 | d | 63.62 | e | 54.02 | a | 45.10 | a | 28.45 | 11.53 | b | 39.27 | a | ||
1976 | 4.72 | d | 16.07 | 17.77 | a | 45.14 | b | 55.53 | 65.05 | 66.87 | d | 67.63 | 58.53 | 40.52 | e | 22.43 | a | 4.98 | a | 38.77 | ||||||
1977 | -7.05 | c | 14.12 | b | 30.53 | a | 47.31 | l | 65.05 | 63.19 | d | 68.21 | 59.68 | 54.06 | e | 46.20 | a | 23.36 | a | 1.93 | a | 38.12 | a | |||
1978 | -4.88 | w | 0.52 | ----- | z | 39.98 | a | 58.58 | a | 64.45 | h | 67.22 | d | 66.21 | 60.50 | b | 44.60 | b | 17.38 | a | 3.05 | c | 39.78 | c | ||
1979 | -8.52 | -6.02 | d | 15.79 | b | 29.62 | b | 46.07 | d | 62.65 | c | 69.04 | c | 62.53 | b | 56.25 | h | 41.00 | c | 23.21 | a | 16.13 | h | 33.54 | b | |
1980 | -0.11 | c | 6.25 | g | 15.50 | c | 46.58 | 58.90 | 63.73 | d | 67.88 | e | 61.34 | b | 53.00 | 40.30 | a | 31.42 | d | 11.48 | c | 40.91 | a | |||
1981 | 11.95 | i | 17.42 | b | 31.39 | c | 43.09 | b | 52.63 | a | 60.02 | d | 67.83 | d | 68.17 | e | 54.83 | c | 41.23 | c | 35.00 | d | 8.40 | f | 47.16 | b |
1982 | -11.44 | e | 2.68 | f | 16.34 | o | 37.48 | i | 52.14 | i | 54.05 | t | 67.50 | d | 63.81 | b | 54.15 | 42.24 | d | 27.00 | n | 26.17 | y | 43.25 | g | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | -0.98 | 6.72 | 19.15 | 37.99 | 52.11 | 61.34 | 66.82 | 64.60 | 54.18 | 43.26 | 24.18 | 8.34 | 36.49 | |||||||||||||
S.D. | 6.52 | 6.69 | 7.21 | 5.20 | 4.17 | 2.60 | 2.25 | 2.97 | 3.89 | 3.66 | 5.77 | 5.93 | 2.14 | |||||||||||||
SKEW | -0.23 | 0.42 | 0.51 | -0.19 | 0.86 | -0.27 | -0.62 | -0.02 | -0.13 | 0.32 | -0.19 | 0.16 | -0.88 | |||||||||||||
MAX | 12.13 | 23.34 | 32.60 | 47.23 | 65.05 | 66.74 | 70.33 | 70.05 | 61.25 | 53.52 | 35.00 | 20.15 | 39.06 | |||||||||||||
MIN | -16.68 | -6.02 | 8.92 | 26.02 | 46.07 | 55.17 | 61.05 | 59.68 | 44.85 | 34.79 | 11.00 | -2.28 | 31.69 | |||||||||||||
YRS | 31 | 32 | 29 | 30 | 32 | 32 | 33 | 33 | 32 | 31 | 30 | 30 | 21 |