| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1955 | ----- | z | 35.94 | j | 45.00 | n | 49.89 | l | 61.86 | i | 72.72 | e | 81.29 | c | 88.58 | e | 75.93 | 65.58 | 46.38 | d | 37.97 | a | 66.92 | |||
| 1956 | 39.13 | 34.50 | c | 44.75 | g | 58.40 | e | 66.19 | e | 75.47 | 85.76 | b | 82.76 | n | 78.48 | c | 64.06 | n | 46.18 | h | 43.48 | b | 60.18 | |||
| 1957 | 33.29 | 44.72 | c | 45.83 | b | 53.50 | h | 61.21 | g | 75.07 | c | 84.84 | 84.68 | 78.04 | d | 57.46 | g | 42.08 | f | 42.28 | f | 63.78 | ||||
| 1958 | 39.39 | 44.57 | 40.71 | 51.70 | 75.35 | 72.83 | 82.19 | 87.48 | 77.97 | 61.39 | 51.83 | 46.32 | 60.98 | |||||||||||||
| 1959 | 41.29 | 39.36 | 49.16 | 63.07 | 60.48 | 78.43 | 87.71 | 85.39 | 69.67 | 56.35 | 53.50 | 42.81 | 60.60 | |||||||||||||
| 1960 | 35.39 | 35.86 | 48.42 | 58.43 | 64.87 | 81.03 | 90.35 | 83.10 | 74.78 | g | 62.94 | 48.13 | 42.94 | 59.22 | ||||||||||||
| 1961 | 46.36 | f | 44.00 | 46.55 | 57.27 | 67.71 | 79.93 | 89.55 | 87.71 | ----- | z | 63.77 | 45.25 | f | 38.19 | 63.85 | ||||||||||
| 1962 | 36.26 | 41.00 | 42.87 | 63.47 | 61.72 | b | 75.13 | 83.90 | ----- | z | 75.86 | h | 68.23 | r | 50.46 | q | 49.52 | 56.73 | ||||||||
| 1963 | 39.54 | c | 50.00 | b | 45.07 | d | 48.38 | i | 65.70 | h | 66.46 | f | 83.42 | l | 86.50 | c | 78.65 | j | 67.46 | g | 48.44 | l | 42.60 | k | 55.28 | |
| 1964 | 36.07 | b | 37.21 | a | 40.69 | b | 57.19 | n | 65.76 | b | 68.43 | 87.10 | 83.97 | 74.21 | a | 70.55 | b | 47.20 | e | 37.55 | 58.98 | |||||
| 1965 | 38.68 | 43.00 | a | 45.38 | b | 55.15 | c | 61.00 | 71.33 | 83.82 | c | 79.18 | c | 68.71 | m | 70.65 | 52.93 | c | 39.26 | 58.22 | ||||||
| 1966 | 36.48 | 36.62 | b | 48.19 | 58.83 | 73.29 | 75.57 | 87.65 | 85.42 | 77.87 | 64.06 | 49.20 | 35.17 | a | 60.70 | |||||||||||
| 1967 | 38.52 | 43.39 | 47.29 | 47.37 | 65.94 | 69.03 | 87.55 | 88.71 | 79.72 | e | 67.71 | 51.70 | 34.00 | b | 60.08 | |||||||||||
| 1968 | ----- | z | 47.79 | a | 50.79 | b | 52.57 | 64.87 | 75.71 | f | ----- | z | 74.65 | 74.23 | 64.00 | e | 44.05 | j | 35.07 | a | 58.00 | |||||
| 1969 | 38.16 | 37.30 | e | 42.83 | a | 58.88 | d | 72.41 | b | 72.39 | g | 85.37 | a | 89.59 | b | 78.67 | 54.35 | 49.96 | d | 39.07 | a | 58.78 | ||||
| 1970 | 36.84 | 47.07 | a | 45.42 | 47.20 | 65.33 | a | 74.23 | 83.87 | 88.13 | 70.79 | b | 59.43 | a | 45.61 | b | 35.26 | 58.27 | ||||||||
| 1971 | 39.00 | a | 41.68 | 44.13 | 53.53 | 62.55 | 72.34 | a | 85.23 | 88.43 | a | 72.55 | a | 57.10 | 46.77 | h | 31.57 | a | 58.92 | |||||||
| 1972 | 34.60 | a | 42.17 | 53.39 | 54.10 | 68.87 | 76.47 | 85.94 | 85.90 | 69.75 | b | 59.06 | 41.60 | 33.06 | 58.74 | |||||||||||
| 1973 | 35.00 | 42.46 | 42.81 | 53.69 | a | ----- | z | ----- | z | 85.03 | ----- | z | 73.69 | a | 63.73 | e | 45.24 | e | ----- | z | 55.21 | |||||
| 1974 | 36.14 | c | 40.54 | b | 47.67 | a | 55.70 | 66.97 | 82.80 | 86.00 | 83.55 | 80.23 | 63.39 | 50.00 | b | 37.88 | e | 60.91 | ||||||||
| 1975 | 36.68 | f | 38.54 | 41.03 | 43.57 | b | 60.21 | g | 71.93 | 85.27 | a | 80.77 | 77.07 | 61.55 | b | 44.25 | b | 44.00 | b | 58.80 | ||||||
| 1976 | 41.39 | 43.79 | 44.00 | c | 54.53 | 70.52 | 73.63 | 86.10 | ----- | z | 73.97 | 61.61 | ----- | z | 47.19 | 59.67 | ||||||||||
| 1977 | 39.48 | 47.67 | a | 42.52 | 62.33 | 56.93 | c | 79.59 | a | 84.32 | 82.65 | 74.73 | 68.23 | 49.50 | b | 43.89 | d | 60.99 | ||||||||
| 1978 | 40.40 | f | 42.30 | e | 54.69 | e | 55.38 | n | 60.52 | h | 76.61 | g | 84.77 | 84.33 | d | 71.20 | 68.03 | 46.53 | 33.67 | a | 60.69 | |||||
| 1979 | 31.93 | a | 38.79 | 48.10 | 55.10 | 64.35 | 77.83 | 85.19 | 82.42 | 82.00 | 65.35 | 43.63 | 44.19 | 59.91 | ||||||||||||
| 1980 | 37.80 | a | 46.03 | 43.59 | d | 57.00 | i | 61.00 | 71.03 | a | 85.30 | a | 81.43 | c | 74.57 | 65.37 | a | 51.04 | b | 47.48 | b | 60.42 | ||||
| 1981 | 47.45 | 46.21 | 48.58 | 58.17 | 60.61 | 75.30 | 84.16 | 86.58 | 76.93 | 57.40 | f | 51.17 | 42.48 | f | 63.52 | |||||||||||
| 1982 | 32.81 | 35.61 | j | 43.42 | 51.13 | 62.48 | 71.33 | 79.35 | 84.74 | 68.47 | 56.16 | 42.33 | 36.81 | 57.19 | ||||||||||||
| 1983 | 41.68 | 40.86 | 45.32 | 48.37 | 60.00 | 70.23 | 79.90 | 81.84 | 75.47 | 63.45 | 44.38 | a | 33.35 | 57.07 | ||||||||||||
| 1984 | 34.81 | 39.34 | 43.61 | 47.40 | 62.68 | 68.77 | 82.52 | 83.67 | a | 75.50 | 53.29 | 44.80 | 34.52 | 55.91 | ||||||||||||
| 1985 | 33.58 | 37.43 | 42.45 | 61.27 | 66.58 | 77.20 | 85.97 | 80.74 | 65.07 | 59.74 | 39.59 | a | 35.61 | 57.10 | ||||||||||||
| 1986 | 43.45 | 44.07 | 54.45 | 54.93 | 65.84 | 79.43 | 81.19 | 86.58 | 64.70 | 62.52 | 50.83 | 44.52 | 61.04 | |||||||||||||
| 1987 | 36.71 | 41.71 | 47.10 | 66.73 | 65.81 | 75.80 | 80.77 | 82.42 | 78.97 | 69.87 | 47.07 | 36.32 | 60.77 | |||||||||||||
| 1988 | 36.90 | 43.34 | 47.23 | 60.77 | 64.87 | 77.63 | 86.26 | 85.52 | 75.33 | 73.87 | 41.10 | 35.74 | 60.71 | |||||||||||||
| 1989 | 33.73 | a | 35.64 | 47.55 | 61.13 | 63.55 | 76.03 | 87.97 | 81.00 | 73.80 | 59.45 | 49.73 | 42.23 | 59.32 | ||||||||||||
| 1990 | 39.13 | 38.04 | 50.10 | 62.63 | 60.74 | 73.13 | 85.23 | 83.13 | 79.30 | 66.26 | 48.87 | 32.48 | 59.92 | |||||||||||||
| 1991 | 37.84 | 50.29 | 44.55 | 52.97 | 60.23 | 72.80 | 86.10 | 85.00 | 76.60 | 65.26 | 45.37 | 42.87 | 59.99 | |||||||||||||
| 1992 | 43.32 | 48.31 | 56.13 | 63.70 | 74.81 | 74.97 | 82.00 | 85.90 | 75.57 | 66.68 | 41.70 | 35.41 | i | 64.83 | ||||||||||||
| 1993 | 33.29 | 36.21 | 53.71 | 53.89 | b | 67.29 | c | 67.40 | 73.19 | 78.03 | 75.82 | h | 66.13 | 43.17 | a | 38.39 | 55.52 | |||||||||
| 1994 | 42.81 | 38.96 | 54.42 | 59.33 | 66.19 | 76.33 | 87.61 | 87.65 | 81.63 | 64.80 | a | 44.00 | c | 41.55 | 62.11 | |||||||||||
| 1995 | 42.35 | 55.36 | 51.55 | 58.14 | a | 62.16 | 71.50 | 83.94 | 85.13 | 76.30 | 63.21 | b | 60.14 | i | 46.00 | m | 64.96 | |||||||||
| 1996 | 40.59 | b | 45.14 | 51.23 | 56.33 | 61.68 | 77.60 | 86.72 | b | 86.52 | 73.35 | m | 63.65 | 51.10 | 39.65 | n | 62.05 | |||||||||
| 1997 | 36.44 | o | 39.57 | n | 54.26 | l | 56.57 | g | 69.92 | s | 74.56 | l | 83.50 | i | 86.14 | j | 77.60 | j | 64.85 | k | 53.40 | o | 40.33 | j | 9999.00 | |
| 1998 | 42.29 | q | ----- | z | 46.00 | i | 53.60 | j | 56.59 | n | 65.86 | i | 86.95 | j | 87.65 | n | 76.10 | i | 59.26 | l | 44.14 | p | 41.30 | k | 9999.00 | |
| 1999 | 41.50 | m | 39.15 | o | 47.91 | i | 50.95 | k | 63.86 | q | 72.11 | l | 85.19 | 84.53 | p | ----- | z | 71.00 | u | 64.00 | w | ----- | z | 85.19 | ||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.97 | 42.28 | 47.06 | 56.16 | 65.05 | 74.60 | 84.69 | 84.39 | 75.11 | 63.47 | 47.07 | 39.25 | 59.74 | |||||||||||||
| S.D. | 3.51 | 4.65 | 4.22 | 5.39 | 4.31 | 3.69 | 3.04 | 3.22 | 4.16 | 4.61 | 3.79 | 4.89 | 1.63 | |||||||||||||
| SKEW | 0.44 | 0.51 | 0.49 | -0.29 | 0.70 | 0.07 | -1.33 | -0.78 | -0.74 | -0.18 | -0.14 | 0.32 | -0.93 | |||||||||||||
| MAX | 47.45 | 55.36 | 56.13 | 66.73 | 75.35 | 82.80 | 90.35 | 89.59 | 82.00 | 73.87 | 53.50 | 49.52 | 62.11 | |||||||||||||
| MIN | 31.93 | 34.50 | 40.69 | 43.57 | 56.93 | 67.40 | 73.19 | 74.65 | 64.70 | 53.29 | 39.59 | 31.57 | 55.91 | |||||||||||||
| NO YRS | 37 | 40 | 40 | 36 | 36 | 37 | 41 | 38 | 35 | 37 | 33 | 35 | 19 | |||||||||||||