| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | 59.80 | u | 61.48 | 63.08 | a | 62.66 | 61.52 | 54.71 | 50.02 | 46.00 | 57.07 | |||||||
| 1970 | 47.06 | 49.62 | 49.06 | 47.18 | 54.65 | g | 60.88 | 64.08 | 63.19 | 58.73 | 54.94 | 48.43 | 41.47 | 53.15 | ||||||||||||
| 1971 | 42.50 | 45.96 | 45.58 | 49.62 | 53.94 | 57.37 | 63.06 | 65.44 | 61.15 | 53.32 | 47.82 | 41.65 | 52.28 | |||||||||||||
| 1972 | 41.39 | 47.38 | 51.63 | 48.27 | 56.32 | 60.88 | 66.08 | 65.76 | 59.57 | ----- | z | 49.62 | 40.69 | 53.42 | ||||||||||||
| 1973 | 42.37 | 48.30 | 45.79 | 52.05 | 56.73 | 61.10 | ----- | z | 62.13 | 62.77 | 54.65 | 47.20 | 47.35 | 52.77 | ||||||||||||
| 1974 | 41.68 | 44.66 | 48.58 | 50.30 | 54.41 | b | 59.76 | a | 63.87 | 63.41 | n | 65.07 | i | 55.32 | 49.80 | 46.40 | 51.48 | |||||||||
| 1975 | 45.94 | 46.11 | 46.29 | 46.78 | 55.10 | 59.97 | 64.76 | 63.34 | 64.35 | 54.65 | 46.55 | 46.68 | 53.37 | |||||||||||||
| 1976 | 45.06 | 43.38 | 45.82 | 48.57 | 55.44 | 57.12 | 63.98 | 63.82 | 63.97 | 56.81 | 52.02 | 43.23 | 53.27 | |||||||||||||
| 1977 | 43.21 | 49.50 | 45.52 | 51.93 | 51.98 | 61.80 | 62.97 | 67.29 | 60.55 | 56.47 | 47.90 | 47.92 | 53.92 | |||||||||||||
| 1978 | 47.45 | 48.82 | 52.68 | 50.22 | 54.97 | 62.82 | 65.58 | 65.53 | 61.40 | 59.48 | 45.22 | 40.05 | 54.52 | |||||||||||||
| 1979 | 41.79 | 45.45 | 52.05 | i | 51.57 | 57.19 | 60.60 | 65.10 | 64.56 | 66.20 | 59.84 | 49.13 | 47.69 | 55.37 | ||||||||||||
| 1980 | 43.47 | 49.79 | 47.56 | 53.02 | 55.45 | 58.02 | 64.74 | 63.58 | 62.80 | 58.35 | 51.03 | 47.58 | 54.62 | |||||||||||||
| 1981 | 49.85 | 48.96 | 50.68 | 52.32 | 56.05 | 61.48 | 64.84 | 66.82 | 63.18 | 55.84 | 50.35 | 47.73 | 55.68 | |||||||||||||
| 1982 | 42.74 | 45.71 | 47.50 | 48.88 | 55.65 | 60.73 | 62.92 | 65.47 | 62.67 | 56.71 | 47.40 | 45.19 | 53.46 | |||||||||||||
| 1983 | 46.26 | 49.25 | 51.11 | 50.75 | 57.79 | 60.92 | 63.05 | 65.68 | 62.23 | 57.71 | 50.60 | 45.79 | 55.09 | |||||||||||||
| 1984 | 46.19 | 47.62 | 51.21 | 49.68 | 55.34 | 58.78 | 64.79 | 64.58 | 62.60 | 54.52 | 47.97 | 42.35 | 53.80 | |||||||||||||
| 1985 | 43.18 | 44.55 | 45.23 | 53.73 | 54.79 | 62.08 | 66.23 | 64.34 | 60.07 | 55.15 | 43.25 | 43.10 | 52.97 | |||||||||||||
| 1986 | 47.55 | 49.62 | 53.77 | 50.48 | 56.11 | 62.92 | 63.92 | 67.45 | 60.80 | 59.21 | 51.02 | 45.68 | 55.71 | |||||||||||||
| 1987 | ----- | z | 46.73 | 50.03 | 54.65 | 59.15 | a | 62.47 | 63.27 | 67.10 | 63.30 | 59.90 | a | 51.05 | 43.02 | 56.42 | ||||||||||
| 1988 | 44.47 | 48.64 | 49.11 | 53.10 | 55.24 | 60.35 | 66.06 | 64.77 | 62.85 | 61.37 | 49.07 | 42.81 | 54.82 | |||||||||||||
| 1989 | 43.94 | 40.32 | 48.97 | 57.20 | 56.63 | 62.73 | 63.21 | 65.19 | 63.20 | 56.40 | ----- | z | 41.73 | 54.50 | ||||||||||||
| 1990 | 43.48 | a | 42.00 | 49.60 | b | 53.13 | 54.44 | 59.83 | j | 66.21 | 66.00 | 63.94 | c | 52.29 | 45.58 | l | 35.87 | 52.70 | ||||||||
| 1991 | ----- | z | 49.43 | 45.15 | a | 50.07 | o | ----- | z | ----- | z | 65.44 | n | 65.13 | p | 65.27 | o | 56.26 | 50.06 | n | ----- | z | 50.28 | |||
| 1992 | 42.87 | p | ----- | z | 51.57 | i | ----- | z | ----- | z | ----- | z | 65.53 | n | 66.28 | o | 61.07 | 56.37 | a | ----- | z | ----- | z | 58.72 | ||
| 1993 | 39.92 | m | 42.95 | 52.17 | m | 50.25 | p | 57.62 | o | 58.10 | j | 61.10 | 64.30 | k | 59.71 | k | 55.40 | 41.65 | 40.98 | 48.42 | ||||||
| 1994 | 44.35 | 42.68 | 48.76 | 52.92 | x | 57.54 | q | 59.00 | y | 64.39 | 64.53 | n | 63.36 | p | 52.50 | 40.45 | a | 40.42 | r | 48.85 | ||||||
| 1995 | 47.30 | p | 48.31 | o | 47.43 | q | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.68 | 49.27 | o | 46.84 | i | 53.68 | ||
| 1996 | 42.93 | p | 46.13 | j | ----- | z | 53.50 | z | 50.04 | r | 59.50 | l | 66.58 | l | 64.95 | 59.93 | a | 58.10 | p | 48.15 | 44.84 | 54.47 | ||||
| 1997 | 42.48 | a | 43.47 | m | 48.91 | i | 50.82 | m | 60.71 | 59.34 | n | 64.28 | v | 67.29 | j | 62.58 | 54.34 | 48.55 | k | 41.53 | n | 55.03 | ||||
| 1998 | 46.68 | i | 45.28 | l | ----- | z | 49.58 | k | 51.33 | k | 59.30 | o | ----- | z | 64.79 | j | 62.82 | 53.00 | b | 46.32 | 39.32 | 50.36 | ||||
| 1999 | 41.98 | g | 43.23 | o | 44.68 | q | 50.29 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 44.38 | 46.56 | 48.62 | 51.12 | 55.88 | 60.68 | 64.23 | 64.98 | 62.17 | 56.04 | 48.00 | 43.80 | 54.12 | |||||||||||||
| S.D. | 2.27 | 2.81 | 2.57 | 2.56 | 1.84 | 1.70 | 1.31 | 1.48 | 1.69 | 2.37 | 2.97 | 3.15 | 1.05 | |||||||||||||
| SKEW | 0.70 | -0.58 | 0.22 | 0.35 | 0.69 | -0.70 | -0.15 | -0.06 | 0.03 | 0.49 | -1.06 | -0.51 | -0.03 | |||||||||||||
| MAX | 49.85 | 49.79 | 53.77 | 57.20 | 60.71 | 62.92 | 66.23 | 67.45 | 66.20 | 61.37 | 52.02 | 47.92 | 55.71 | |||||||||||||
| MIN | 41.39 | 40.32 | 45.15 | 46.78 | 51.98 | 57.12 | 61.10 | 62.13 | 58.73 | 52.29 | 40.45 | 35.87 | 52.28 | |||||||||||||
| NO YRS | 22 | 24 | 22 | 21 | 21 | 21 | 23 | 22 | 25 | 28 | 24 | 25 | 13 | |||||||||||||