| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1941 | ----- | z | ----- | z | ----- | z | ----- | z | 63.06 | 66.47 | 82.62 | b | 74.80 | a | 64.50 | 58.74 | d | 53.20 | 39.29 | 62.84 | ||||||
| 1942 | 36.45 | 39.11 | 46.58 | 55.93 | 56.21 | c | 63.50 | 83.29 | 82.65 | 75.70 | 66.06 | 44.20 | 42.13 | 57.65 | ||||||||||||
| 1943 | 35.58 | 44.18 | 45.48 | 57.63 | 61.13 | 67.30 | 83.10 | 78.48 | 83.03 | 62.97 | 49.33 | 39.90 | 59.01 | |||||||||||||
| 1944 | 37.00 | 38.83 | 46.03 | 51.90 | 61.84 | 63.37 | 77.42 | 76.58 | 72.80 | 66.39 | 42.73 | 38.06 | 56.08 | |||||||||||||
| 1945 | 39.42 | 40.25 | 42.23 | 51.80 | 61.81 | 68.67 | 82.71 | 80.81 | 71.77 | 65.26 | 40.47 | 36.35 | 56.79 | |||||||||||||
| 1946 | 34.39 | 38.21 | 42.71 | 57.97 | 64.29 | 65.87 | 79.68 | 81.13 | 69.27 | 52.06 | 43.03 | 41.65 | 55.85 | |||||||||||||
| 1947 | 36.58 | 47.04 | 51.94 | 56.07 | 69.90 | 63.97 | 75.35 | 75.55 | 73.77 | 59.90 | 46.00 | 39.10 | 57.93 | |||||||||||||
| 1948 | 41.58 | 35.55 | 42.10 | 47.50 | 59.06 | 72.93 | c | 78.20 | a | 75.11 | c | 68.38 | d | 62.58 | e | 42.93 | c | 33.05 | i | 56.90 | ||||||
| 1949 | 34.68 | 43.18 | 49.27 | a | 69.77 | 71.45 | 71.23 | 77.87 | 77.68 | 73.47 | 54.68 | 54.83 | 37.19 | 59.61 | ||||||||||||
| 1950 | 30.81 | 40.68 | 42.81 | 50.30 | 60.35 | 66.63 | 78.58 | 80.16 | 71.60 | 55.06 | 47.00 | a | 42.81 | 55.57 | ||||||||||||
| 1951 | 33.48 | 37.89 | 41.17 | a | 59.10 | a | 59.84 | 71.37 | 80.06 | 77.79 | b | 73.97 | a | 53.73 | a | 43.76 | a | 32.13 | 55.36 | |||||||
| 1952 | 31.87 | 39.21 | 39.52 | 58.13 | 63.65 | 66.33 | 82.45 | 79.06 | 76.17 | 69.10 | 42.97 | 34.81 | 56.94 | |||||||||||||
| 1953 | 41.90 | b | 41.52 | a | 44.74 | 50.83 | 54.55 | 60.70 | 80.35 | 73.63 | a | 75.60 | 59.53 | a | 47.83 | a | 40.23 | 55.95 | ||||||||
| 1954 | 35.81 | 44.46 | 42.52 | 54.30 | 66.19 | 63.00 | a | 77.74 | 69.74 | 66.70 | 59.64 | c | 50.50 | 37.77 | 55.70 | |||||||||||
| 1955 | 33.81 | 37.64 | 41.10 | a | 42.97 | a | 57.52 | 69.40 | 73.27 | a | 81.35 | 70.27 | 59.19 | 41.83 | l | 37.00 | c | 54.86 | ||||||||
| 1956 | 37.00 | 36.28 | 45.35 | 57.13 | 65.29 | 68.23 | 82.06 | 77.81 | 73.77 | 56.61 | 50.37 | 43.40 | a | 57.78 | ||||||||||||
| 1957 | 29.58 | 43.43 | 45.06 | 55.30 | 64.71 | 73.33 | 77.68 | 76.58 | 74.90 | 53.39 | 45.34 | a | 41.35 | 56.72 | ||||||||||||
| 1958 | 38.32 | 44.79 | 44.23 | 52.37 | 71.84 | 69.93 | 83.29 | 83.68 | 69.73 | 65.19 | 47.57 | 45.26 | 59.68 | |||||||||||||
| 1959 | 40.35 | 40.00 | 48.35 | 58.37 | 59.32 | 72.00 | 84.97 | 78.74 | 65.63 | 61.58 | 53.80 | 41.06 | 58.68 | |||||||||||||
| 1960 | 35.68 | 39.69 | 48.97 | 53.03 | 58.35 | 76.30 | 86.39 | 78.23 | 76.30 | 62.10 | 43.40 | 39.65 | 58.17 | |||||||||||||
| 1961 | 43.35 | 42.61 | 44.48 | 55.17 | 60.45 | 78.93 | 84.58 | 85.00 | 68.50 | 60.10 | 45.13 | 38.19 | 58.88 | |||||||||||||
| 1962 | 39.39 | 40.68 | 43.10 | 60.47 | 57.57 | a | 73.33 | 81.77 | 76.39 | 76.47 | 60.90 | 48.53 | 43.84 | 58.54 | ||||||||||||
| 1963 | 39.90 | 49.29 | 47.68 | 48.17 | 64.74 | 68.83 | 75.65 | 80.19 | 77.90 | 59.94 | 44.57 | 41.97 | 58.23 | |||||||||||||
| 1964 | 35.67 | a | 41.21 | 39.10 | 56.50 | t | 62.55 | 68.70 | 79.90 | 78.03 | 71.57 | 65.61 | 51.86 | w | 35.47 | a | 57.78 | |||||||||
| 1965 | 38.06 | 44.41 | a | 49.55 | 53.77 | 59.06 | 70.40 | 79.39 | 75.62 | b | 67.07 | 66.26 | 46.27 | 37.52 | 57.28 | |||||||||||
| 1966 | 36.90 | 40.29 | 46.19 | 58.53 | 67.58 | 67.23 | 74.68 | 80.26 | 73.23 | 62.23 | 46.53 | 38.89 | c | 57.71 | ||||||||||||
| 1967 | 38.26 | 44.74 | a | 41.87 | 46.32 | h | 63.77 | 71.59 | a | 83.84 | 87.00 | 78.33 | 58.74 | 49.30 | g | 35.07 | a | 60.32 | ||||||||
| 1968 | 37.90 | 43.28 | 49.59 | b | 52.40 | 60.45 | 70.77 | 83.39 | 73.25 | c | 72.61 | b | 58.45 | 43.43 | b | 35.30 | k | 58.68 | ||||||||
| 1969 | 32.87 | 36.39 | 47.35 | 52.20 | 66.55 | 70.40 | 76.96 | h | 79.65 | 72.80 | 53.06 | 51.57 | 40.77 | 54.87 | ||||||||||||
| 1970 | 36.94 | 47.32 | f | 45.94 | 46.97 | 63.94 | 74.20 | 82.19 | 84.18 | c | 67.69 | d | 58.23 | 44.30 | 34.87 | 58.13 | ||||||||||
| 1971 | 37.65 | 42.39 | 39.71 | 51.17 | 60.97 | 65.40 | 81.71 | 83.87 | 66.63 | 55.29 | 45.77 | 34.71 | 55.44 | |||||||||||||
| 1972 | 35.74 | 41.14 | 50.00 | 49.73 | 65.68 | 73.30 | 81.19 | 81.26 | 66.97 | 58.35 | 44.03 | 32.94 | 56.69 | |||||||||||||
| 1973 | 33.81 | 42.29 | 44.77 | 55.37 | 66.90 | 71.70 | 82.03 | 81.13 | 71.47 | 59.03 | 39.90 | 38.74 | 57.26 | |||||||||||||
| 1974 | 32.97 | 40.89 | 44.52 | 50.90 | 59.00 | 76.43 | 76.61 | 80.39 | 79.20 | 64.06 | 46.53 | 39.33 | a | 57.57 | ||||||||||||
| 1975 | 39.45 | 38.04 | 41.13 | 44.70 | 61.55 | 69.07 | 80.16 | 75.19 | 77.67 | 54.94 | 41.93 | 41.19 | 55.42 | |||||||||||||
| 1976 | 40.68 | 40.52 | 44.06 | 50.53 | 65.19 | 66.70 | 79.16 | 70.94 | 73.83 | 64.48 | 50.57 | 43.48 | 57.51 | |||||||||||||
| 1977 | 38.26 | 48.29 | 42.55 | 60.14 | a | 54.42 | 77.43 | 79.58 | 83.65 | 67.60 | 61.32 | 44.60 | 39.87 | a | 58.14 | |||||||||||
| 1978 | 39.13 | 42.89 | 53.03 | 50.20 | 58.81 | 70.60 | 79.10 | 76.29 | 64.93 | 68.03 | 42.90 | 35.84 | 56.81 | |||||||||||||
| 1979 | 31.90 | 39.29 | 49.52 | 51.47 | 66.00 | 74.50 | 82.29 | 77.42 | 77.33 | 62.77 | 44.03 | 42.81 | 58.28 | |||||||||||||
| 1980 | 37.23 | 43.17 | 45.42 | 56.13 | 63.65 | 65.60 | 81.87 | 79.10 | 73.20 | 62.87 | 46.80 | 42.23 | 58.11 | |||||||||||||
| 1981 | 40.68 | 44.04 | 49.32 | 55.00 | 60.45 | 69.80 | 79.65 | 86.32 | 75.07 | 58.06 | 46.93 | 38.55 | 58.66 | |||||||||||||
| 1982 | 35.29 | 39.39 | 43.84 | 49.77 | 65.00 | 70.30 | 77.48 | 79.03 | 66.00 | 56.26 | 41.07 | 35.39 | 54.90 | |||||||||||||
| 1983 | 40.52 | 40.39 | 44.48 | 49.83 | 65.00 | 66.90 | 71.45 | 78.58 | 69.53 | 60.45 | 42.40 | 31.39 | 55.08 | |||||||||||||
| 1984 | 40.52 | 42.62 | ----- | z | 47.47 | 59.13 | 65.87 | 82.55 | 80.16 | 68.00 | 51.35 | 39.97 | 32.65 | 55.48 | ||||||||||||
| 1985 | 36.68 | 40.07 | 44.77 | 58.67 | 63.39 | 73.60 | 85.45 | 77.26 | 62.83 | 57.81 | 36.83 | 37.61 | 56.25 | |||||||||||||
| 1986 | 41.32 | 41.29 | 51.84 | 52.93 | 62.48 | 77.20 | 74.68 | 85.81 | 62.37 | 63.26 | 46.03 | 38.26 | 58.12 | |||||||||||||
| 1987 | 37.06 | 42.89 | 47.29 | 62.32 | b | 66.48 | 76.83 | 74.65 | 81.97 | 79.93 | 72.55 | 47.53 | 36.16 | 60.47 | ||||||||||||
| 1988 | 36.65 | 48.34 | 49.19 | 55.37 | 60.48 | 69.90 | 83.58 | 82.97 | 75.77 | 73.48 | 41.93 | 38.74 | 59.70 | |||||||||||||
| 1989 | 38.55 | 34.32 | 44.65 | 58.57 | 59.61 | 73.63 | 78.68 | 75.13 | 73.37 | 59.81 | 50.03 | 44.87 | 57.60 | |||||||||||||
| 1990 | 40.16 | 39.21 | 50.06 | 61.63 | 59.94 | 69.73 | 83.16 | 80.39 | 78.73 | 59.58 | 47.10 | 32.29 | 58.50 | |||||||||||||
| 1991 | 41.16 | 50.68 | 45.23 | 50.93 | 56.94 | 66.17 | 82.90 | 82.00 | 80.70 | 66.39 | 44.73 | 39.87 | 58.97 | |||||||||||||
| 1992 | 40.35 | 49.38 | 56.16 | 58.63 | 72.55 | 77.60 | 79.58 | 84.23 | 74.07 | 65.42 | 44.57 | 34.55 | 61.42 | |||||||||||||
| 1993 | 30.48 | 36.00 | 48.52 | 50.00 | 65.55 | 66.43 | 70.26 | 76.42 | 76.77 | 63.71 | 46.40 | 38.81 | 55.78 | |||||||||||||
| 1994 | 43.58 | 41.96 | 53.29 | 56.93 | 65.74 | 71.00 | 85.97 | 82.29 | 77.37 | 60.26 | 37.10 | 37.55 | 59.42 | |||||||||||||
| 1995 | 38.90 | 50.71 | 46.03 | 51.97 | 62.16 | 67.50 | 77.23 | 76.65 | 76.57 | 60.32 | 50.43 | 38.32 | 58.07 | |||||||||||||
| 1996 | 38.13 | 40.79 | 48.84 | 54.03 | 58.10 | 71.27 | 84.16 | 81.68 | 69.73 | 58.87 | 47.43 | ----- | z | 59.37 | ||||||||||||
| 1997 | 38.74 | 40.93 | 49.45 | 51.47 | 67.58 | 68.93 | 78.61 | 79.71 | 71.33 | 57.45 | 46.80 | 38.55 | 57.46 | |||||||||||||
| 1998 | 40.52 | 40.43 | 47.35 | 52.40 | 54.00 | 68.73 | 83.45 | 83.58 | 76.90 | 59.32 | 42.33 | 35.23 | 57.02 | |||||||||||||
| 1999 | 39.90 | 37.29 | 43.13 | 50.23 | 58.48 | 67.83 | 79.58 | 77.65 | 74.33 | 64.87 | 49.50 | 39.58 | 56.86 | |||||||||||||
| 2000 | 37.26 | 41.10 | 46.13 | 57.80 | 60.10 | 73.87 | 78.45 | 82.87 | 71.87 | 58.81 | 41.27 | 38.81 | 57.36 | |||||||||||||
| 2001 | 39.26 | 39.86 | 48.81 | 49.40 | 69.68 | 68.97 | 78.52 | 83.71 | 76.53 | 62.45 | 46.53 | 35.87 | 58.30 | |||||||||||||
| 2002 | 36.81 | 44.46 | 43.71 | 55.93 | 60.87 | 73.57 | 84.97 | 79.52 | 75.17 | 62.00 | 50.00 | 38.77 | 58.81 | |||||||||||||
| 2003 | 41.84 | 42.57 | 47.42 | 48.97 | 60.13 | 76.37 | 85.81 | 82.23 | 77.97 | 64.97 | 40.40 | 37.84 | 58.87 | |||||||||||||
| 2004 | 37.13 | 41.14 | 53.77 | 58.67 | 60.19 | 73.00 | 83.26 | 80.77 | 69.87 | 59.81 | 47.13 | 41.00 | 58.81 | |||||||||||||
| 2005 | 39.58 | 46.14 | 51.13 | 51.77 | 60.90 | 65.23 | 83.74 | 84.39 | 72.37 | 61.84 | 42.60 | 35.61 | 57.94 | |||||||||||||
| 2006 | 38.19 | 40.79 | 41.87 | 53.57 | 65.94 | 73.57 | 85.58 | 80.90 | 75.80 | 62.06 | 43.00 | 37.94 | 58.27 | |||||||||||||
| 2007 | 37.90 | 42.11 | 53.58 | 54.77 | 66.61 | 72.03 | 84.35 | 81.39 | 71.93 | 56.61 | 49.60 | 35.26 | 58.85 | |||||||||||||
| 2008 | 33.77 | 43.28 | 44.55 | 48.67 | 61.77 | 70.03 | 83.71 | 80.13 | 76.90 | 62.48 | 49.47 | 37.65 | 57.70 | |||||||||||||
| 2009 | 41.74 | 43.32 | 43.23 | 53.33 | 64.87 | 70.57 | 85.03 | 81.68 | 80.47 | 56.13 | 44.97 | 34.61 | 58.33 | |||||||||||||
| 2010 | 40.97 | 43.64 | 50.10 | 50.50 | 55.48 | 67.47 | 82.52 | 80.90 | 71.70 | 62.84 | 44.23 | 37.03 | 57.28 | |||||||||||||
| 2011 | 41.48 | 40.00 | 42.97 | 45.03 | 56.42 | 66.77 | 77.26 | 84.03 | 80.27 | 61.90 | 44.47 | 41.58 | 56.85 | |||||||||||||
| 2012 | 40.55 | 42.45 | 45.06 | 55.37 | 63.87 | 66.57 | 81.77 | 86.19 | 78.33 | 63.45 | 44.90 | 36.58 | 58.76 | |||||||||||||
| 2013 | 37.77 | 43.89 | 48.61 | 61.00 | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 43.43 | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 37.69 | 41.82 | 46.25 | 53.63 | 62.35 | 70.04 | 80.62 | 79.85 | 73.07 | 60.88 | 45.57 | 38.32 | 57.67 | |||||||||||||
| S.D. | 3.10 | 3.43 | 3.74 | 4.62 | 4.14 | 3.93 | 3.57 | 3.60 | 4.62 | 4.38 | 3.67 | 3.14 | 1.37 | |||||||||||||
| SKEW | -0.54 | 0.53 | 0.37 | 0.45 | 0.25 | 0.16 | -0.67 | -0.36 | -0.28 | 0.28 | 0.17 | 0.01 | 0.03 | |||||||||||||
| MAX | 43.58 | 50.71 | 56.16 | 69.77 | 72.55 | 78.93 | 86.39 | 87.00 | 83.03 | 73.48 | 54.83 | 45.26 | 61.42 | |||||||||||||
| MIN | 29.58 | 34.32 | 39.10 | 42.97 | 54.00 | 60.70 | 70.26 | 69.74 | 62.37 | 51.35 | 36.83 | 31.39 | 54.90 | |||||||||||||
| NO YRS | 72 | 71 | 71 | 69 | 72 | 72 | 71 | 72 | 72 | 72 | 69 | 69 | 62 | |||||||||||||