YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1965 | ----- | z | ----- | z | ----- | z | ----- | z | 76.89 | q | 80.22 | 83.24 | 83.35 | 79.68 | 65.18 | 63.75 | 53.40 | 72.69 | e | |||||||
1966 | 43.48 | 47.68 | 58.37 | a | 68.31 | a | 73.10 | 78.87 | 83.24 | 82.71 | 77.47 | 67.23 | 63.78 | a | 50.58 | a | 66.23 | |||||||||
1967 | 50.34 | 50.14 | 65.40 | 75.63 | 75.15 | 82.68 | 84.53 | 82.16 | 75.23 | 67.77 | 59.87 | 50.15 | 68.25 | |||||||||||||
1968 | 46.92 | 47.90 | 56.98 | 67.25 | 74.06 | 78.58 | 80.71 | 82.90 | a | 75.05 | 71.44 | ----- | z | 52.60 | 66.76 | a | ||||||||||
1969 | 51.89 | 52.61 | 53.11 | 67.63 | 71.84 | 79.78 | 85.76 | 84.58 | 77.60 | 68.82 | 56.90 | 55.00 | 67.13 | |||||||||||||
1970 | 43.97 | 52.34 | 54.85 | 68.43 | 70.79 | 78.48 | 82.74 | 84.50 | 77.90 | 66.32 | 56.30 | 59.45 | 66.34 | |||||||||||||
1971 | 54.60 | 54.71 | 60.84 | 66.82 | 74.27 | 81.82 | 84.66 | 80.35 | a | 78.05 | 71.47 | 60.16 | a | 56.63 | 68.70 | |||||||||||
1972 | 50.05 | 53.91 | 64.74 | 71.57 | 72.69 | 79.98 | 81.45 | 82.15 | 82.12 | 70.06 | 52.42 | 46.00 | 67.26 | |||||||||||||
1973 | 44.97 | 49.77 | 63.47 | 63.03 | 72.63 | 78.35 | 83.16 | 81.61 | 78.55 | 71.48 | a | 65.45 | 52.72 | a | 67.10 | |||||||||||
1974 | 48.06 | 55.62 | 66.61 | 68.05 | 77.31 | 78.95 | 83.69 | 81.39 | 71.57 | a | 68.56 | 57.10 | 49.74 | 67.22 | ||||||||||||
1975 | 54.05 | 52.25 | 59.32 | f | 67.70 | 73.71 | 80.15 | 81.40 | 81.87 | 74.85 | 69.39 | 60.67 | 51.48 | 67.96 | a | |||||||||||
1976 | 49.39 | 60.79 | 61.77 | 67.87 | 69.73 | 78.75 | 80.23 | 82.85 | 77.52 | 61.61 | 51.67 | 48.73 | c | 65.91 | ||||||||||||
1977 | 42.38 | a | 53.69 | a | 62.06 | 66.30 | 75.10 | 81.52 | a | 84.63 | 86.31 | 83.47 | 72.08 | 61.67 | 52.97 | b | 68.51 | |||||||||
1978 | 42.05 | 43.95 | 57.88 | a | 68.80 | 77.63 | 81.43 | 86.73 | 83.73 | 78.43 | 69.48 | 61.28 | 49.76 | 66.76 | ||||||||||||
1979 | ----- | z | ----- | z | 62.52 | d | 67.53 | 71.42 | f | 79.28 | 82.24 | 81.74 | 75.32 | 72.90 | 55.15 | 50.74 | 69.71 | c | ||||||||
1980 | 51.48 | a | 50.74 | 58.13 | 63.76 | a | 74.40 | 83.38 | 87.23 | 85.13 | 81.40 | 68.04 | c | 56.42 | 52.71 | 67.73 | ||||||||||
1981 | 48.88 | b | 54.38 | b | 59.41 | c | 71.20 | 73.02 | 79.28 | 82.16 | 83.32 | 76.15 | 68.85 | a | 60.33 | 50.48 | a | 67.29 | ||||||||
1982 | 47.40 | f | 46.62 | c | 61.96 | d | 65.50 | j | 69.35 | d | 79.59 | b | 86.02 | 86.15 | 79.04 | c | 66.93 | c | 60.66 | k | 51.46 | h | 71.96 | d | ||
1983 | 45.45 | i | 48.80 | c | 55.80 | a | 61.70 | b | 72.78 | a | 78.22 | 82.71 | b | 83.55 | 77.33 | 69.69 | 62.14 | a | 43.91 | c | 66.97 | a | ||||
1984 | 46.25 | g | 53.22 | b | 62.11 | 69.42 | 75.60 | a | 81.78 | a | 84.26 | 84.40 | a | 76.23 | 69.72 | a | 57.52 | 58.45 | b | 70.25 | a | |||||
1985 | 41.61 | d | 46.74 | e | 63.30 | a | 68.38 | 74.56 | 80.13 | 83.08 | a | 86.47 | 77.93 | 69.43 | a | 61.10 | a | 45.25 | a | 66.50 | ||||||
1986 | 50.53 | b | 54.73 | d | 61.50 | 69.53 | 72.15 | 80.10 | 84.53 | 83.48 | 80.28 | 66.05 | 56.05 | a | 47.52 | 67.20 | ||||||||||
1987 | 46.60 | 51.61 | a | 54.63 | 63.53 | 73.77 | 77.45 | 81.27 | 84.23 | 75.83 | a | 66.25 | c | 57.12 | a | 51.50 | e | 65.32 | ||||||||
1988 | 42.66 | b | 48.93 | 59.29 | b | 64.63 | 70.73 | a | 77.23 | 83.27 | 84.82 | a | 78.87 | 68.93 | a | 61.20 | 51.39 | 66.00 | ||||||||
1989 | 51.92 | 47.00 | b | 57.91 | c | 66.42 | 75.71 | 78.45 | 82.75 | a | 81.98 | a | 74.93 | 68.63 | 59.37 | 39.82 | 65.41 | |||||||||
1990 | 52.89 | 55.93 | 59.00 | a | 64.84 | b | 75.48 | c | 83.87 | 80.87 | a | 83.40 | 78.28 | a | 65.39 | c | 61.07 | a | 48.11 | c | 67.43 | |||||
1991 | 44.41 | d | 52.20 | 59.83 | a | 68.45 | 74.13 | a | 78.76 | a | 80.06 | 82.45 | a | 73.88 | 69.41 | c | 53.48 | a | 51.05 | a | 65.68 | |||||
1992 | 47.40 | a | 53.96 | c | 60.18 | a | 64.92 | 69.94 | 78.03 | 81.38 | a | 78.35 | 77.48 | 67.11 | 53.50 | 50.45 | a | 65.23 | ||||||||
1993 | 46.12 | c | 49.75 | 56.38 | b | 63.28 | 69.65 | 78.72 | 83.39 | 84.45 | 77.95 | 66.43 | a | 51.58 | 51.24 | b | 64.91 | |||||||||
1994 | 47.82 | a | 50.25 | b | 59.65 | 65.55 | 70.84 | 80.40 | a | 84.10 | 80.81 | 73.45 | 69.26 | 63.24 | a | 52.29 | b | 66.47 | ||||||||
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | 68.78 | a | 81.19 | 82.19 | a | 86.16 | 83.65 | 77.13 | 69.97 | a | 60.57 | a | 54.00 | 73.74 | c | |||||
1997 | 49.31 | 53.18 | 63.47 | b | 62.75 | 72.85 | 78.80 | 83.40 | 84.11 | 80.02 | 69.44 | 55.31 | a | 49.05 | 66.81 | |||||||||||
1998 | 56.80 | a | 53.75 | 59.21 | 64.57 | a | 79.17 | a | 86.70 | 87.76 | 83.89 | 80.47 | 71.00 | 62.57 | a | 53.07 | a | 69.91 | ||||||||
1999 | 56.78 | a | 60.66 | 59.50 | y | 71.60 | j | 76.19 | e | 81.98 | e | 81.90 | a | 86.27 | 79.42 | f | 67.57 | j | 62.45 | i | 52.27 | e | 70.87 | e | ||
2000 | 56.31 | e | 61.22 | b | 65.14 | c | 67.54 | d | 77.91 | c | 77.70 | t | 86.23 | r | 84.68 | c | 80.07 | c | 69.20 | c | 56.06 | d | 45.82 | n | 68.68 | c |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.75 | 52.16 | 60.18 | 67.01 | 73.86 | 80.11 | 83.37 | 83.37 | 77.63 | 68.63 | 58.59 | 50.98 | 66.85 | |||||||||||||
S.D. | 4.54 | 4.11 | 3.37 | 2.92 | 2.83 | 2.05 | 1.98 | 1.78 | 2.55 | 2.29 | 3.78 | 3.86 | 1.19 | |||||||||||||
SKEW | 0.16 | 0.41 | -0.11 | 0.52 | 0.47 | 1.18 | 0.39 | -0.42 | -0.04 | -0.71 | -0.23 | -0.44 | 0.54 | |||||||||||||
MAX | 56.80 | 61.22 | 66.61 | 75.63 | 81.19 | 86.70 | 87.76 | 86.47 | 83.47 | 72.90 | 65.45 | 59.45 | 69.91 | |||||||||||||
MIN | 41.61 | 43.95 | 53.11 | 61.70 | 69.35 | 77.23 | 80.06 | 78.35 | 71.57 | 61.61 | 51.58 | 39.82 | 64.91 | |||||||||||||
YRS | 29 | 32 | 31 | 32 | 33 | 34 | 34 | 35 | 34 | 34 | 32 | 33 | 25 |