| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | 47.70 | u | 52.50 | 51.10 | a | 47.81 | 48.93 | 42.13 | 37.07 | 36.90 | 45.21 | |||||||
| 1970 | 39.13 | 36.18 | 37.39 | 35.93 | 42.00 | 48.40 | 48.16 | 49.55 | 42.60 | 40.61 | 40.70 | 33.84 | 41.21 | |||||||||||||
| 1971 | 33.84 | 36.54 | 36.06 | 39.30 | 44.42 | 47.30 | 50.19 | 52.90 | 47.03 | 41.45 | 38.37 | 34.71 | 41.84 | |||||||||||||
| 1972 | 33.03 | 38.45 | 42.03 | 37.73 | 44.52 | 47.20 | 50.68 | 50.42 | 44.37 | ----- | z | 40.47 | 32.81 | 41.97 | ||||||||||||
| 1973 | 34.00 | 36.82 | 36.39 | 38.60 | 43.32 | 48.43 | ----- | z | 48.74 | 48.53 | 41.65 | 41.53 | 40.52 | 41.68 | ||||||||||||
| 1974 | 32.71 | 35.07 | 37.65 | 39.13 | 43.14 | b | 48.00 | a | 50.48 | 51.10 | a | 48.03 | 37.68 | 39.17 | 38.87 | 41.75 | ||||||||||
| 1975 | 37.39 | 37.32 | 36.87 | 36.67 | 42.55 | 46.97 | 52.71 | 50.94 | 48.37 | 45.65 | 37.47 | 39.10 | 42.67 | |||||||||||||
| 1976 | 35.06 | 33.14 | 35.23 | 37.17 | 40.35 | 43.80 | 50.58 | 52.58 | 49.87 | 42.10 | 40.83 | 30.94 | 40.97 | |||||||||||||
| 1977 | 30.06 | 37.00 | 35.39 | 38.83 | 42.23 | 49.03 | 49.10 | 54.19 | 50.70 | 44.77 | 40.23 | 40.55 | 42.67 | |||||||||||||
| 1978 | 38.13 | 40.18 | 41.32 | 40.07 | 42.55 | 51.33 | 52.58 | 52.39 | 49.53 | 44.42 | 33.37 | 31.03 | 43.07 | |||||||||||||
| 1979 | 32.10 | 38.71 | 41.32 | 41.97 | 44.71 | 45.90 | 51.32 | 51.61 | 51.77 | 48.32 | 38.93 | 37.58 | 43.69 | |||||||||||||
| 1980 | 34.00 | 39.45 | 37.68 | 41.50 | 44.58 | 48.47 | 52.68 | 50.29 | 48.00 | 43.32 | 40.87 | 37.90 | 43.23 | |||||||||||||
| 1981 | 38.26 | 36.86 | 39.45 | 40.87 | 45.10 | 49.43 | 50.42 | 53.32 | 48.70 | 43.29 | 40.23 | 41.16 | 43.92 | |||||||||||||
| 1982 | 34.16 | 34.96 | 37.74 | 36.53 | 41.29 | 49.83 | 51.65 | 52.00 | 48.43 | 45.42 | 37.60 | 37.13 | 42.23 | |||||||||||||
| 1983 | 36.74 | 40.86 | 42.94 | 38.13 | 46.42 | 49.43 | 53.13 | 53.61 | 47.27 | 45.16 | 43.47 | 39.87 | 44.75 | |||||||||||||
| 1984 | 36.26 | 38.21 | 41.19 | 39.97 | 43.48 | 47.37 | 49.13 | 50.16 | 46.30 | 44.26 | 40.33 | 33.87 | 42.54 | |||||||||||||
| 1985 | 29.58 | 32.93 | 34.58 | 42.47 | 42.65 | 47.67 | 52.13 | 47.52 | 47.60 | 42.29 | 35.50 | 32.32 | 40.60 | |||||||||||||
| 1986 | 38.52 | 41.71 | 41.65 | 40.00 | 43.81 | 50.23 | 51.42 | 53.06 | 47.80 | 46.48 | 41.97 | 36.10 | 44.40 | |||||||||||||
| 1987 | ----- | z | 36.50 | 39.19 | 41.47 | 47.84 | 48.50 | 51.74 | 50.81 | 48.43 | 44.32 | 41.77 | 36.03 | 44.24 | ||||||||||||
| 1988 | 35.71 | 36.90 | 37.19 | 42.23 | 44.35 | 49.13 | 50.71 | 49.13 | 46.73 | 49.55 | 41.77 | 34.39 | 43.15 | |||||||||||||
| 1989 | 35.19 | 30.00 | 40.32 | 43.60 | 45.55 | 50.27 | 52.16 | 53.35 | 47.00 | 43.06 | ----- | z | 33.19 | 43.06 | ||||||||||||
| 1990 | 36.84 | 33.79 | 38.93 | b | 42.23 | 42.29 | 49.40 | j | 52.03 | 52.68 | 50.96 | c | 39.23 | 37.61 | l | 28.35 | 41.73 | |||||||||
| 1991 | ----- | z | 39.89 | 34.80 | a | 39.47 | m | ----- | z | ----- | z | 51.06 | m | 49.73 | p | 45.06 | n | 39.71 | 39.88 | n | ----- | z | 38.13 | |||
| 1992 | 33.53 | p | ----- | z | 38.91 | i | ----- | z | ----- | z | ----- | z | 52.50 | m | 48.41 | n | 45.73 | 42.00 | 41.40 | ----- | z | 43.04 | ||||
| 1993 | 30.68 | l | 32.57 | 44.00 | l | 40.57 | p | 45.31 | o | 46.95 | j | 48.42 | 50.65 | k | 42.74 | k | 42.74 | 30.17 | 32.97 | 37.37 | ||||||
| 1994 | 35.48 | 33.96 | 36.32 | 39.50 | x | 46.80 | p | 48.17 | x | 49.58 | 48.82 | n | 48.38 | n | 38.97 | 32.23 | 31.86 | q | 37.76 | |||||||
| 1995 | 40.33 | p | 38.27 | m | 35.75 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.55 | 41.00 | o | 39.95 | i | 40.55 | ||
| 1996 | 36.81 | o | 35.37 | j | ----- | z | 39.75 | z | 38.00 | o | 44.50 | l | 50.79 | l | 48.58 | 44.10 | a | 44.93 | p | 40.37 | 38.45 | 42.88 | ||||
| 1997 | 34.71 | 34.00 | j | 38.27 | i | 39.29 | m | 47.06 | 45.50 | n | 49.00 | v | 52.67 | j | 50.27 | 45.26 | 41.58 | k | 33.12 | n | 44.32 | |||||
| 1998 | 40.52 | 37.62 | l | ----- | z | 38.21 | k | 43.10 | j | 49.00 | o | ----- | z | 50.14 | j | 47.23 | 41.71 | 40.03 | 32.10 | 40.32 | ||||||
| 1999 | 34.58 | g | 35.85 | o | 33.36 | q | 36.29 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 35.28 | 36.58 | 38.33 | 39.73 | 43.83 | 48.53 | 50.96 | 51.16 | 47.86 | 43.07 | 39.03 | 35.63 | 42.67 | |||||||||||||
| S.D. | 2.77 | 2.89 | 2.54 | 2.21 | 1.86 | 1.88 | 1.40 | 1.96 | 2.13 | 2.75 | 3.24 | 3.47 | 1.20 | |||||||||||||
| SKEW | -0.21 | -0.27 | 0.25 | -0.07 | 0.36 | -0.28 | -0.40 | -0.31 | -0.49 | 0.27 | -1.30 | -0.13 | -0.04 | |||||||||||||
| MAX | 40.52 | 41.71 | 42.94 | 43.60 | 47.84 | 52.50 | 53.13 | 54.19 | 51.77 | 49.55 | 43.47 | 41.16 | 44.75 | |||||||||||||
| MIN | 29.58 | 30.00 | 34.58 | 35.93 | 40.35 | 43.80 | 48.16 | 47.52 | 42.60 | 37.68 | 30.17 | 28.35 | 40.60 | |||||||||||||
| NO YRS | 23 | 24 | 23 | 21 | 22 | 21 | 23 | 23 | 26 | 28 | 25 | 25 | 16 | |||||||||||||