| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.02 | a | 66.05 | 65.71 | 59.96 | b | 46.10 | j | 36.16 | k | 21.03 | a | 55.95 | |||
| 1949 | 9.47 | 25.19 | b | 39.87 | a | 51.07 | 59.28 | b | 63.09 | a | 68.37 | 68.13 | 62.48 | d | 46.38 | g | 42.00 | j | 31.08 | m | 49.66 | |||||
| 1950 | 6.19 | m | 26.77 | m | 39.58 | e | 46.63 | d | 54.21 | j | 63.14 | i | 67.05 | a | 70.00 | 64.02 | e | 49.00 | w | 35.75 | n | 32.82 | l | 57.46 | ||
| 1951 | 27.73 | k | ----- | z | 36.67 | k | 50.81 | i | 57.64 | j | 63.50 | h | 70.42 | 69.24 | 62.00 | k | 51.25 | q | 36.80 | y | 24.00 | t | 69.83 | |||
| 1952 | 19.97 | l | 30.80 | i | 38.29 | n | 49.45 | h | 55.92 | k | 59.30 | o | 70.67 | b | 70.05 | 63.27 | f | 54.64 | m | 31.72 | u | 30.67 | v | 70.36 | ||
| 1953 | 33.50 | q | 36.35 | o | 42.90 | p | 46.47 | l | 53.73 | i | 56.68 | e | 68.19 | 67.68 | 64.32 | j | 49.22 | h | 38.05 | i | 34.42 | k | 64.18 | |||
| 1954 | 19.52 | k | 31.71 | k | 36.24 | j | 43.95 | k | 56.30 | k | 58.12 | i | 66.61 | 64.85 | 59.98 | g | 47.13 | l | 41.70 | t | 28.21 | q | 65.73 | |||
| 1955 | ----- | z | ----- | z | 34.87 | l | ----- | z | 53.12 | r | 62.79 | k | 66.42 | 67.60 | 60.90 | 47.73 | 29.03 | 21.50 | 48.86 | |||||||
| 1956 | 22.25 | g | 19.67 | 33.50 | 47.78 | 59.68 | 60.17 | 70.77 | 68.26 | 59.52 | 47.13 | 33.58 | 28.71 | 48.07 | ||||||||||||
| 1957 | 13.98 | e | 29.12 | 38.92 | 49.65 | 61.26 | 63.15 | 66.27 | 64.45 | 63.68 | 46.48 | a | 35.75 | 31.35 | a | 47.01 | ||||||||||
| 1958 | 30.79 | 37.66 | 39.85 | 47.70 | 62.91 | b | 69.03 | a | 74.26 | 72.52 | 59.03 | 49.52 | 32.95 | 30.15 | 50.53 | |||||||||||
| 1959 | 26.65 | 30.45 | 39.47 | b | 49.00 | 53.98 | a | 62.11 | c | 70.42 | a | 67.02 | f | 58.32 | 49.16 | 34.75 | 30.27 | 45.87 | ||||||||
| 1960 | 22.97 | 33.98 | 39.06 | 49.02 | 53.73 | 62.97 | 72.63 | a | 65.44 | 59.67 | 49.17 | a | 34.74 | a | 25.10 | 47.37 | ||||||||||
| 1961 | 28.42 | 35.93 | 40.80 | a | 47.80 | 55.52 | 68.47 | o | 71.31 | 72.95 | 56.45 | 45.66 | 29.73 | 27.56 | 46.56 | |||||||||||
| 1962 | 24.06 | 33.62 | 37.85 | 51.27 | 52.63 | 62.15 | 68.05 | 66.87 | 61.85 | 49.37 | 39.05 | 33.15 | 48.33 | |||||||||||||
| 1963 | 23.81 | 36.43 | 42.65 | 47.10 | 56.00 | 62.95 | 65.98 | 68.27 | 64.50 | 50.95 | 37.05 | 25.05 | 48.39 | |||||||||||||
| 1964 | 28.40 | 31.97 | 38.08 | 46.81 | a | ----- | z | 61.77 | 67.87 | 64.16 | 58.42 | 48.54 | g | 34.77 | b | 22.84 | 45.51 | |||||||||
| 1965 | 27.55 | 35.16 | 38.89 | 49.98 | 54.50 | 62.90 | 70.60 | 69.02 | 57.87 | ----- | z | 41.12 | 27.88 | c | 48.68 | |||||||||||
| 1966 | 24.97 | 33.59 | 38.60 | 49.62 | a | 58.29 | 60.52 | 66.92 | 69.18 | 64.98 | 48.77 | 39.43 | 33.08 | 49.00 | ||||||||||||
| 1967 | 33.08 | 38.00 | 40.63 | 44.77 | 56.34 | 66.27 | 70.90 | 73.42 | 67.10 | 50.15 | 37.85 | 27.48 | 50.50 | |||||||||||||
| 1968 | 27.37 | a | 32.26 | 42.32 | 47.11 | b | 56.34 | 62.98 | 72.11 | 66.10 | 61.62 | 46.07 | d | 36.17 | 21.52 | 47.66 | ||||||||||
| 1969 | 13.55 | 25.54 | 37.32 | 46.62 | 59.27 | a | 69.02 | 68.00 | 67.32 | 60.50 | 47.15 | 38.12 | 29.13 | 46.79 | ||||||||||||
| 1970 | 24.83 | d | 34.29 | 38.47 | 44.68 | 56.48 | 67.27 | 71.19 | 69.87 | 57.48 | 47.03 | 34.60 | 22.81 | 47.42 | ||||||||||||
| 1971 | 26.34 | 33.04 | 34.95 | 45.73 | 58.44 | 59.68 | 70.40 | 72.73 | 55.82 | 47.05 | 36.13 | 23.88 | b | 47.02 | ||||||||||||
| 1972 | 22.18 | 28.17 | 38.31 | 42.70 | 57.95 | 63.72 | 67.56 | 69.56 | 55.60 | 48.40 | 39.58 | 23.66 | 46.45 | |||||||||||||
| 1973 | ----- | z | 31.86 | 41.26 | 49.40 | 56.87 | 62.37 | 70.50 | 68.27 | 61.55 | 48.37 | 32.40 | 31.19 | 50.37 | ||||||||||||
| 1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1975 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1976 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1979 | 12.13 | 26.98 | 39.79 | 47.53 | 56.55 | 64.30 | 69.65 | 69.08 | 62.22 | 51.95 | 32.58 | 31.32 | 47.01 | |||||||||||||
| 1980 | 17.63 | 30.22 | 38.44 | 49.63 | 55.39 | 58.32 | 67.12 | a | 62.74 | 56.70 | 48.71 | 37.24 | a | 29.66 | 45.98 | |||||||||||
| 1981 | 34.13 | 32.36 | 43.47 | 47.45 | 55.05 | 59.32 | 66.81 | 72.43 | a | 59.70 | 45.32 | 37.10 | 26.21 | 48.28 | ||||||||||||
| 1982 | 23.76 | 28.98 | 38.18 | 43.90 | 54.89 | 65.42 | 67.44 | 66.85 | 59.33 | 46.48 | 32.27 | 25.06 | 46.05 | |||||||||||||
| 1983 | 31.23 | 34.79 | 42.69 | 47.92 | 57.87 | 61.25 | 64.32 | 69.71 | 55.88 | 46.39 | 37.08 | 17.06 | 47.18 | |||||||||||||
| 1984 | 27.29 | 35.00 | ----- | z | 46.08 | 52.00 | 61.02 | 69.69 | 68.55 | 55.85 | 45.48 | 33.88 | 17.87 | 46.61 | ||||||||||||
| 1985 | 23.26 | 25.62 | 38.63 | 48.85 | 56.83 | a | 63.52 | 75.31 | 67.29 | 56.35 | 46.42 | 23.95 | 18.76 | 45.40 | ||||||||||||
| 1986 | 28.29 | 30.46 | 42.00 | 47.00 | 55.08 | 66.83 | 64.94 | 73.34 | 56.53 | 50.56 | 37.65 | 28.21 | 48.41 | |||||||||||||
| 1987 | 25.81 | 35.89 | 40.52 | 51.28 | 58.00 | 65.93 | 68.79 | 69.03 | 64.30 | 50.65 | 40.35 | 24.21 | 49.56 | |||||||||||||
| 1988 | 25.05 | 33.88 | 41.11 | 50.10 | 55.35 | 61.18 | 68.84 | 68.08 | a | 59.75 | 54.18 | 37.62 | 27.97 | 48.59 | ||||||||||||
| 1989 | 28.48 | 23.91 | 38.06 | 51.95 | 56.61 | 65.73 | 69.00 | 67.73 | 62.35 | 49.29 | 40.25 | 32.00 | 48.78 | |||||||||||||
| 1990 | 32.55 | 30.93 | 42.79 | 52.55 | 55.03 | ----- | z | 72.97 | 70.48 | 65.90 | ----- | z | ----- | z | ----- | z | 52.90 | |||||||||
| 1991 | 22.44 | 37.66 | 38.97 | ----- | z | 53.65 | 59.27 | 69.02 | 70.55 | 63.07 | 48.65 | 35.12 | 32.89 | 48.30 | ||||||||||||
| 1992 | 30.77 | 37.67 | 46.10 | 49.95 | 59.81 | 69.35 | 68.69 | 70.16 | 57.60 | 49.76 | 36.40 | 23.98 | 50.02 | |||||||||||||
| 1993 | 19.71 | 25.62 | k | 37.55 | 46.10 | 60.37 | 61.15 | 62.77 | 67.45 | 61.53 | 52.15 | 32.35 | 28.84 | 48.18 | ||||||||||||
| 1994 | 32.66 | 29.55 | 42.98 | 52.62 | 57.85 | 60.92 | 72.40 | 68.48 | 64.50 | 49.10 | 32.45 | 27.19 | 49.23 | |||||||||||||
| 1995 | 25.39 | 33.77 | 38.11 | 47.13 | 58.69 | 62.83 | 69.47 | 64.11 | 63.60 | 47.27 | 37.83 | 29.79 | 48.17 | |||||||||||||
| 1996 | 24.29 | 28.26 | 39.73 | 47.90 | 51.66 | 61.17 | 70.89 | 69.00 | 58.38 | 47.31 | 34.20 | 22.58 | 46.28 | |||||||||||||
| 1997 | 25.90 | 33.64 | 39.32 | 45.92 | 57.81 | 60.87 | 67.73 | 70.19 | 61.22 | 47.69 | 38.18 | 29.84 | 48.19 | |||||||||||||
| 1998 | 28.58 | 35.20 | 41.82 | 48.50 | 57.47 | 63.35 | 74.35 | 70.73 | 65.88 | 48.23 | 38.80 | 26.44 | 49.95 | |||||||||||||
| 1999 | 31.71 | 34.43 | e | 38.24 | 46.18 | 52.70 | c | 60.93 | a | 66.61 | d | 70.92 | a | 59.72 | 47.44 | 40.14 | b | 33.45 | b | 48.54 | ||||||
| 2000 | 27.11 | c | 32.19 | 40.48 | d | 50.67 | 54.91 | h | 63.12 | a | 67.50 | a | 68.24 | 58.48 | a | 47.74 | 31.82 | 26.52 | 46.72 | |||||||
| 2001 | 29.10 | a | 30.20 | 40.63 | a | 46.62 | 56.68 | a | 60.08 | e | 69.53 | b | 71.22 | a | 63.36 | a | 47.21 | b | 39.00 | a | 30.37 | 48.67 | ||||
| 2002 | 31.03 | 33.09 | 36.89 | 48.32 | 53.35 | 64.57 | 70.61 | 68.10 | 60.35 | 47.45 | 37.92 | 32.56 | 48.69 | |||||||||||||
| 2003 | 32.24 | 34.96 | 42.44 | 47.32 | ----- | z | 65.38 | 72.37 | 70.95 | 63.44 | d | 52.74 | 32.80 | 27.77 | 49.31 | |||||||||||
| 2004 | 27.24 | 33.52 | 44.76 | 50.93 | 56.56 | 65.75 | 71.68 | 72.19 | 59.50 | 50.31 | 37.27 | 31.84 | 50.13 | |||||||||||||
| 2005 | 27.77 | 35.11 | 44.08 | 48.88 | e | 58.24 | 61.47 | 69.50 | 70.58 | 58.70 | 50.37 | 35.08 | 23.45 | 48.60 | ||||||||||||
| 2006 | 32.87 | 31.77 | 39.72 | b | 47.74 | c | 56.55 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 41.73 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 25.93 | 32.09 | 39.95 | 48.16 | 56.58 | 63.02 | 69.20 | 68.84 | 60.52 | 48.53 | 35.69 | 27.03 | 48.13 | |||||||||||||
| S.D. | 5.66 | 3.97 | 2.43 | 2.22 | 2.47 | 2.88 | 2.60 | 2.48 | 3.05 | 2.02 | 3.42 | 4.27 | 1.35 | |||||||||||||
| SKEW | -1.11 | -0.92 | 0.12 | -0.02 | 0.13 | 0.36 | 0.06 | -0.26 | 0.18 | 0.68 | -0.96 | -0.45 | -0.01 | |||||||||||||
| MAX | 34.13 | 38.00 | 46.10 | 52.62 | 62.91 | 69.35 | 75.31 | 73.42 | 67.10 | 54.18 | 41.12 | 33.45 | 50.53 | |||||||||||||
| MIN | 9.47 | 19.67 | 33.50 | 42.70 | 51.66 | 56.68 | 62.77 | 62.74 | 55.60 | 45.32 | 23.95 | 17.06 | 45.40 | |||||||||||||
| NO YRS | 45 | 46 | 47 | 47 | 44 | 46 | 53 | 52 | 49 | 43 | 45 | 46 | 33 | |||||||||||||