| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.43 | 46.73 | g | 47.33 | a | 31.92 | 45.23 | |||
| 1950 | 20.73 | 37.25 | 40.05 | 42.23 | 47.05 | c | 58.48 | 56.81 | 58.97 | 55.57 | 45.77 | 34.95 | 38.76 | f | 45.26 | |||||||||||
| 1951 | 32.71 | 34.77 | 33.66 | 43.07 | 49.02 | 56.45 | 60.69 | 60.21 | 55.48 | 45.29 | 40.65 | 33.27 | 45.44 | |||||||||||||
| 1952 | 28.30 | h | 36.52 | a | 37.35 | 41.37 | 49.16 | 52.52 | 59.48 | 58.92 | 53.52 | 51.03 | 42.22 | 38.97 | 47.37 | |||||||||||
| 1953 | 29.45 | 39.29 | 39.23 | 44.77 | 52.18 | 56.42 | 59.85 | 59.06 | 54.09 | c | 48.67 | d | 41.12 | 39.18 | 46.94 | |||||||||||
| 1954 | 30.60 | 34.95 | 37.95 | 38.47 | 51.07 | h | 52.65 | 55.29 | 61.05 | 56.47 | 47.53 | 46.83 | 37.39 | 45.38 | ||||||||||||
| 1955 | 38.94 | 36.68 | 35.12 | e | 42.02 | 46.62 | c | 52.87 | 56.81 | 54.95 | 52.93 | 45.27 | 32.32 | 29.15 | 43.64 | |||||||||||
| 1956 | 34.58 | 32.86 | 36.98 | 44.45 | 50.97 | 52.73 | 58.84 | 57.81 | 52.92 | 43.82 | c | 40.37 | 36.52 | 45.24 | ||||||||||||
| 1957 | 30.15 | 33.71 | 39.69 | 43.05 | 51.58 | 54.55 | 56.92 | 60.55 | 58.27 | 47.71 | 43.00 | 37.18 | 46.36 | |||||||||||||
| 1958 | 41.79 | 40.00 | 40.68 | 47.02 | 52.76 | 62.18 | 63.81 | 58.37 | 53.15 | 47.15 | 38.48 | 39.58 | 48.75 | |||||||||||||
| 1959 | 33.79 | 36.11 | 38.69 | 43.97 | 50.40 | 55.60 | 58.90 | 57.23 | 53.87 | 48.08 | 40.15 | 40.31 | 46.42 | |||||||||||||
| 1960 | 37.18 | ----- | z | 39.59 | b | 45.45 | 50.05 | 51.10 | 56.47 | 58.10 | 53.37 | 48.69 | 41.60 | 40.69 | 47.48 | |||||||||||
| 1961 | 39.87 | 38.41 | 40.81 | 44.38 | 51.00 | 54.78 | 61.05 | 61.27 | 54.23 | 46.44 | 38.63 | 35.77 | 47.22 | |||||||||||||
| 1962 | 37.61 | 36.77 | 36.19 | 43.05 | 48.02 | 52.73 | 59.16 | 58.73 | 54.23 | 48.24 | 44.47 | 38.94 | 46.51 | |||||||||||||
| 1963 | 35.89 | 43.50 | 39.55 | 44.17 | 50.98 | 52.55 | 58.81 | 61.74 | 56.68 | 47.56 | 36.02 | 39.06 | 47.21 | |||||||||||||
| 1964 | 35.46 | d | 40.05 | 37.15 | 41.07 | 47.03 | 55.45 | 55.69 | 54.85 | 52.63 | 45.89 | 38.33 | 26.61 | 44.19 | ||||||||||||
| 1965 | 32.60 | 36.73 | 39.94 | 43.22 | 46.18 | 51.87 | 58.94 | 59.58 | 56.55 | 47.95 | 38.87 | 35.92 | 45.69 | |||||||||||||
| 1966 | 30.58 | 37.70 | 39.87 | 43.12 | 46.73 | 53.88 | 60.87 | 57.21 | 53.38 | 44.94 | 38.73 | 38.76 | 45.48 | |||||||||||||
| 1967 | 36.11 | 38.86 | 35.32 | 43.32 | 49.16 | 58.92 | 57.26 | 60.85 | 55.60 | 47.71 | 40.77 | 36.44 | 46.69 | |||||||||||||
| 1968 | 32.45 | 38.47 | 41.92 | 41.02 | 52.63 | 54.50 | 59.16 | 57.97 | 52.62 | 46.56 | 42.38 | 31.27 | 45.91 | |||||||||||||
| 1969 | 21.73 | 35.91 | 39.18 | 43.77 | 51.92 | 60.02 | 55.45 | 54.71 | 54.42 | 48.56 | 43.47 | 41.92 | 45.92 | |||||||||||||
| 1970 | 33.21 | 42.84 | 41.97 | 42.50 | 46.56 | 54.48 | 55.61 | 56.45 | 50.47 | 46.08 | 38.23 | 32.06 | 45.04 | |||||||||||||
| 1971 | 28.76 | 36.00 | 35.27 | 39.75 | 44.66 | 50.65 | 59.85 | 57.85 | 51.95 | 43.18 | 38.83 | 29.08 | a | 42.99 | ||||||||||||
| 1972 | 25.02 | 32.48 | 37.34 | 37.85 | 48.03 | 52.72 | 58.47 | 57.55 | 51.57 | 45.21 | 40.97 | 33.87 | 43.42 | |||||||||||||
| 1973 | 33.03 | 36.48 | 39.66 | 44.95 | 47.35 | 50.17 | 53.85 | 54.47 | 52.15 | 42.89 | 30.52 | 36.06 | 43.47 | |||||||||||||
| 1974 | 27.95 | 36.29 | 35.37 | 45.22 | 46.87 | 50.38 | 55.40 | 59.76 | 57.60 | 46.13 | 40.48 | 40.73 | 45.18 | |||||||||||||
| 1975 | 33.26 | 29.95 | 36.61 | 43.08 | 48.53 | 52.67 | 57.29 | 56.73 | 54.23 | 45.15 | 36.22 | 35.15 | 44.07 | |||||||||||||
| 1976 | 35.47 | 33.16 | 35.48 | 42.86 | a | 46.37 | 53.55 | 56.35 | 57.61 | 53.87 | 45.26 | 41.43 | 37.60 | 44.92 | ||||||||||||
| 1977 | 35.79 | 41.95 | 38.58 | 43.75 | 50.03 | 54.23 | 58.02 | 63.55 | 53.25 | 45.42 | 34.15 | 27.77 | 45.54 | |||||||||||||
| 1978 | 31.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 47.63 | 38.17 | 33.47 | 37.58 | |||||
| 1979 | 29.90 | a | 30.20 | a | 40.11 | 43.88 | 47.52 | 52.45 | i | 59.19 | 61.55 | a | 55.38 | a | 49.00 | a | 41.81 | f | 36.43 | a | 45.32 | |||||
| 1980 | 29.91 | b | 38.53 | 37.62 | c | 43.47 | 50.24 | b | 57.60 | a | ----- | z | 58.23 | a | ----- | z | 48.88 | a | 43.65 | 33.23 | a | 44.14 | ||||
| 1981 | 43.69 | ----- | z | 41.17 | k | 44.00 | u | ----- | z | 52.95 | b | 60.13 | a | 60.30 | a | 53.28 | c | 46.00 | 42.86 | a | 35.00 | c | 49.28 | |||
| 1982 | 26.47 | b | ----- | z | ----- | z | 39.66 | b | ----- | z | ----- | z | ----- | z | ----- | z | 54.07 | c | 45.45 | a | ----- | z | ----- | z | 41.41 | |
| 1983 | 38.34 | 41.30 | 40.55 | a | 45.35 | 49.73 | a | 54.52 | c | 57.23 | c | 56.58 | a | 50.98 | 45.85 | ----- | z | ----- | z | 48.04 | ||||||
| 1984 | 38.65 | 38.85 | b | 42.53 | 42.98 | 47.22 | b | 52.32 | 55.85 | 57.21 | 52.42 | 44.95 | 36.38 | 31.00 | 45.03 | |||||||||||
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.68 | 56.44 | ----- | z | ----- | z | ----- | z | ----- | z | 57.56 | |||
| 1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.08 | 49.50 | b | 38.69 | a | 39.45 | 45.18 | |||
| 1987 | 37.91 | b | 40.43 | a | ----- | z | 43.27 | 49.03 | a | 53.35 | 59.65 | 60.18 | 53.53 | 47.58 | 42.52 | 38.25 | a | 47.79 | ||||||||
| 1988 | ----- | z | ----- | z | ----- | z | 43.28 | 49.03 | 53.32 | 55.89 | 58.19 | 52.27 | 48.15 | 41.85 | 35.92 | 48.65 | ||||||||||
| 1989 | 33.59 | b | 31.52 | 36.40 | 44.48 | 49.68 | 55.98 | 58.79 | 59.18 | 54.98 | 45.58 | 39.87 | 42.10 | 46.01 | ||||||||||||
| 1990 | 34.26 | 32.16 | 40.12 | a | 45.25 | 50.85 | 54.83 | 60.21 | 59.94 | 53.70 | 43.26 | 34.57 | 31.68 | 45.07 | ||||||||||||
| 1991 | 29.56 | 39.82 | 35.56 | 43.05 | 48.61 | 54.37 | 56.26 | 57.77 | 53.02 | 42.68 | 42.42 | 40.06 | 45.27 | |||||||||||||
| 1992 | 39.89 | 38.52 | 40.21 | 43.05 | 48.85 | 55.68 | 58.44 | 58.24 | 49.00 | 43.58 | 41.70 | 32.50 | 45.81 | |||||||||||||
| 1993 | 32.13 | 38.66 | 38.10 | 44.60 | 53.45 | 55.65 | 60.08 | 61.11 | 55.38 | 49.15 | 40.37 | 40.74 | 47.45 | |||||||||||||
| 1994 | 40.23 | 30.25 | 41.27 | 46.93 | 50.48 | 56.15 | 59.98 | 62.37 | 54.32 | 47.15 | 37.60 | 35.44 | 46.85 | |||||||||||||
| 1995 | 37.21 | 36.96 | 38.52 | 46.65 | 52.00 | 55.97 | 59.55 | 56.23 | 57.38 | 46.60 | 39.18 | 36.02 | 46.86 | |||||||||||||
| 1996 | 27.10 | 36.78 | 38.69 | 43.38 | 47.77 | 52.95 | 57.26 | 57.03 | 50.60 | 45.28 | a | 36.27 | 37.28 | v | 44.83 | |||||||||||
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1999 | ----- | z | ----- | z | 37.03 | 41.28 | 44.60 | 52.36 | a | 56.53 | 57.10 | 50.35 | 45.71 | 40.43 | 37.94 | 46.33 | ||||||||||
| 2000 | 31.11 | 35.26 | 39.48 | 42.03 | 47.31 | 54.50 | 57.92 | 57.35 | 52.75 | 45.60 | 41.72 | 35.65 | 45.06 | |||||||||||||
| 2001 | 39.82 | 34.52 | 37.52 | 41.65 | 45.32 | 52.90 | 56.35 | 58.40 | 53.07 | 44.97 | 38.07 | 35.02 | 44.80 | |||||||||||||
| 2002 | 35.79 | 33.64 | 31.06 | 39.42 | 46.23 | 53.85 | 56.21 | 56.47 | 52.15 | 46.40 | 43.52 | 38.37 | 44.43 | |||||||||||||
| 2003 | 38.60 | 35.68 | 35.61 | 43.02 | 46.74 | 53.98 | 57.10 | 57.08 | 53.03 | 46.69 | 35.45 | 36.66 | 44.97 | |||||||||||||
| 2004 | 31.50 | 37.17 | 39.02 | 44.28 | 51.73 | 58.18 | 60.40 | 60.94 | 51.62 | 44.69 | 39.27 | 36.24 | 46.25 | |||||||||||||
| 2005 | 33.53 | 35.71 | 40.19 | 45.35 | 53.10 | 56.78 | 56.65 | 59.11 | 52.43 | 45.11 | 38.97 | 38.00 | 46.25 | |||||||||||||
| 2006 | 36.24 | 33.55 | 33.53 | 40.47 | 48.06 | 55.30 | 58.16 | 55.40 | 52.52 | 45.15 | 31.28 | 37.97 | 43.97 | |||||||||||||
| 2007 | 35.13 | 36.18 | 36.29 | 41.68 | 47.29 | 54.25 | 57.42 | 58.35 | 52.27 | 44.48 | 37.98 | 32.10 | 44.45 | |||||||||||||
| 2008 | 32.42 | 34.53 | 37.15 | 39.43 | 49.11 | 51.55 | 55.05 | 57.69 | g | 54.30 | 45.45 | 42.23 | 30.69 | 42.90 | ||||||||||||
| 2009 | 33.21 | 32.25 | 34.16 | 42.25 | 49.06 | 55.85 | 61.47 | 59.08 | 52.05 | 45.29 | 38.92 | 31.77 | 44.61 | |||||||||||||
| 2010 | 40.94 | 40.75 | 39.69 | 43.32 | 50.13 | 53.30 | 59.10 | 59.79 | 53.88 | 46.82 | 38.82 | 35.05 | 46.80 | |||||||||||||
| 2011 | 34.65 | 32.00 | 37.34 | 40.97 | 48.92 | 55.02 | 56.84 | 56.71 | 53.77 | 45.84 | 36.37 | 36.56 | 44.58 | |||||||||||||
| 2012 | 32.05 | 37.05 | 35.82 | 43.70 | 46.02 | 52.73 | 57.52 | 57.48 | 53.30 | 43.00 | 39.85 | 33.98 | 44.38 | |||||||||||||
| 2013 | 37.92 | 38.91 | 37.05 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.96 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 33.82 | 36.46 | 38.00 | 43.00 | 48.91 | 54.38 | 58.05 | 58.42 | 53.60 | 46.23 | 39.49 | 35.76 | 45.48 | |||||||||||||
| S.D. | 4.72 | 3.21 | 2.38 | 1.98 | 2.22 | 2.36 | 1.94 | 2.01 | 1.85 | 1.80 | 3.37 | 3.60 | 1.23 | |||||||||||||
| SKEW | -0.45 | -0.06 | -0.43 | -0.42 | 0.14 | 0.87 | 0.31 | 0.22 | 0.31 | 0.20 | -0.37 | -0.46 | 0.14 | |||||||||||||
| MAX | 43.69 | 43.50 | 42.53 | 47.02 | 53.45 | 62.18 | 63.81 | 63.55 | 58.27 | 51.03 | 47.33 | 42.10 | 48.75 | |||||||||||||
| MIN | 20.73 | 29.95 | 31.06 | 37.85 | 44.60 | 50.17 | 53.85 | 54.47 | 49.00 | 42.68 | 30.52 | 26.61 | 42.99 | |||||||||||||
| NO YRS | 57 | 54 | 55 | 57 | 55 | 56 | 57 | 57 | 59 | 60 | 58 | 57 | 44 | |||||||||||||