| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1956 | ----- | z | ----- | z | 50.92 | f | 58.30 | 65.58 | 71.70 | 83.03 | 79.55 | 76.87 | 59.10 | 53.27 | 47.19 | j | 68.42 | |||||||||
| 1957 | ----- | z | ----- | z | 52.41 | i | 58.29 | f | 63.50 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1958 | ----- | z | ----- | z | 48.50 | z | 57.45 | a | 76.97 | a | 76.23 | 86.39 | 89.48 | 80.67 | 71.84 | 56.30 | 55.87 | 72.36 | ||||||||
| 1959 | 47.55 | 45.89 | 54.97 | 66.23 | 62.10 | 81.57 | 92.00 | 87.97 | 71.93 | 72.87 | 64.77 | 47.46 | g | 67.99 | ||||||||||||
| 1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9999.00 | |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | 70.54 | g | 74.90 | 82.97 | 86.35 | 79.20 | 75.55 | k | 53.77 | 49.74 | 71.16 | |||||||
| 1964 | 44.13 | 50.00 | 52.77 | 62.77 | 68.87 | 72.53 | 87.94 | 85.52 | 76.03 | 72.35 | 47.00 | 40.45 | 63.36 | |||||||||||||
| 1965 | 40.19 | 48.82 | 53.55 | 59.23 | 65.23 | 75.70 | 85.29 | 80.13 | 72.70 | 72.42 | 51.07 | 42.74 | 62.26 | |||||||||||||
| 1966 | 41.65 | 43.39 | 54.74 | 65.97 | 76.06 | 75.00 | 85.42 | 87.52 | 78.30 | 70.16 | 51.93 | 42.94 | 64.42 | |||||||||||||
| 1967 | 44.71 | 49.25 | 48.61 | 47.10 | 68.35 | 75.50 | 89.97 | 91.65 | 81.43 | 68.84 | 54.23 | 37.26 | 63.08 | |||||||||||||
| 1968 | 41.55 | 49.76 | 56.16 | 59.87 | 68.65 | 80.03 | 90.84 | 78.06 | 77.43 | 65.97 | 47.40 | 38.97 | 62.89 | |||||||||||||
| 1969 | 40.10 | 38.21 | 46.90 | 59.60 | 73.68 | 74.73 | 86.74 | 88.13 | 79.90 | 57.32 | 55.37 | 44.68 | 62.11 | |||||||||||||
| 1970 | 41.26 | 51.61 | 49.00 | i | 52.93 | 70.16 | 78.40 | 89.42 | 89.90 | 75.78 | c | 63.06 | 49.50 | 34.74 | 63.34 | |||||||||||
| 1971 | 45.31 | e | 47.07 | 43.52 | h | 57.10 | 64.81 | 72.00 | 88.33 | d | 90.26 | 72.33 | 59.52 | 48.83 | 35.71 | 61.93 | ||||||||||
| 1972 | 37.90 | 44.52 | 57.64 | f | 55.57 | 71.90 | 78.96 | c | 87.97 | 88.30 | d | 71.60 | 62.65 | 46.10 | 36.32 | 61.98 | ||||||||||
| 1973 | 38.39 | 46.75 | 48.87 | 60.20 | 76.29 | 82.37 | 89.68 | 90.14 | i | 78.07 | 66.43 | h | 44.67 | 44.45 | 60.97 | |||||||||||
| 1974 | 38.42 | 46.79 | 49.94 | 58.73 | 68.94 | 86.27 | 88.68 | c | 87.68 | 83.50 | 68.71 | 54.11 | b | 41.78 | d | 64.46 | ||||||||||
| 1975 | 43.93 | a | 43.12 | c | 47.19 | 50.37 | 68.29 | 75.87 | 88.42 | 83.06 | 82.07 | 62.32 | 48.10 | 47.45 | 61.68 | |||||||||||
| 1976 | 46.74 | 47.17 | 48.84 | 59.30 | 75.39 | 76.30 | 87.94 | 78.16 | 80.87 | 68.16 | 59.53 | 50.65 | 64.92 | |||||||||||||
| 1977 | 37.19 | 52.50 | 48.65 | 67.47 | 60.19 | 83.07 | 87.23 | 87.68 | 74.67 | ----- | z | ----- | z | ----- | z | 66.52 | ||||||||||
| 1978 | 42.67 | y | 52.38 | l | 61.06 | 55.73 | 67.68 | f | 78.23 | h | 86.71 | 84.63 | d | 72.85 | d | 75.19 | e | 48.47 | 37.68 | 65.29 | ||||||
| 1979 | 36.45 | 43.14 | 54.35 | 58.63 | 70.87 | 81.33 | 89.74 | 83.65 | 83.07 | 66.29 | 47.40 | 46.90 | 63.49 | |||||||||||||
| 1980 | 42.39 | 50.62 | 49.29 | 62.07 | 67.26 | 74.67 | 87.77 | 85.00 | 78.47 | 67.52 | 52.67 | 48.87 | 63.88 | |||||||||||||
| 1981 | 45.29 | 46.82 | 52.65 | 62.07 | 69.45 | 79.27 | 88.97 | 89.97 | 76.67 | 57.26 | 51.13 | 44.03 | 63.63 | |||||||||||||
| 1982 | 38.23 | 44.36 | 48.03 | 54.67 | 67.90 | 75.53 | 85.26 | 87.39 | 70.43 | 62.25 | w | 43.37 | 38.61 | 59.43 | ||||||||||||
| 1983 | 44.29 | 44.82 | 48.16 | 52.30 | 67.58 | 74.40 | 83.87 | 88.22 | m | 78.00 | 67.32 | 46.50 | 43.60 | z | 60.72 | |||||||||||
| 1984 | 44.39 | ----- | z | ----- | z | 56.13 | 71.68 | 73.67 | 89.74 | 89.52 | 78.07 | 58.16 | ----- | z | ----- | z | 70.17 | |||||||||
| 1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.88 | e | 92.00 | 84.94 | 67.69 | a | 64.00 | ----- | z | 43.77 | 72.55 | |||||
| 1986 | 51.45 | 48.00 | ----- | z | ----- | z | 81.59 | n | 83.97 | 84.48 | ----- | z | ----- | z | 65.62 | o | 53.47 | 46.77 | 61.36 | |||||||
| 1987 | 42.06 | 49.36 | 54.68 | 71.00 | a | 73.42 | 84.07 | 84.40 | a | 89.74 | 85.37 | 75.23 | 51.83 | 39.29 | 66.70 | |||||||||||
| 1988 | 40.77 | 54.52 | 58.90 | 65.27 | 71.97 | 83.50 | 92.94 | 90.06 | 82.43 | 79.61 | 50.00 | 43.16 | 67.76 | |||||||||||||
| 1989 | 39.45 | 38.11 | 54.77 | a | 66.87 | 68.68 | 80.00 | 90.74 | 83.74 | 79.23 | 66.29 | 56.31 | a | 49.39 | 64.46 | |||||||||||
| 1990 | 44.35 | 43.11 | 57.97 | 67.57 | 68.32 | 78.63 | 88.61 | 87.32 | 82.83 | 65.13 | 44.83 | 35.32 | 63.67 | |||||||||||||
| 1991 | 46.94 | ----- | z | ----- | z | 55.03 | 61.87 | ----- | z | ----- | z | ----- | z | ----- | z | 67.23 | 51.10 | 44.03 | 54.37 | |||||||
| 1992 | 46.48 | ----- | z | 57.90 | 63.73 | ----- | z | ----- | z | 83.47 | l | 88.05 | l | 81.22 | l | 66.68 | 46.68 | k | 38.53 | n | 58.70 | |||||
| 1993 | ----- | z | 38.50 | 50.97 | a | 56.33 | o | 72.67 | p | 70.53 | o | 78.20 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 44.73 | ||
| 1994 | 47.57 | j | 42.50 | l | 59.14 | j | 62.67 | o | 68.71 | q | 77.44 | l | 91.62 | r | 87.64 | q | 81.80 | o | 64.93 | p | 42.60 | t | 36.00 | l | 9999.00 | |
| 1995 | 40.81 | 58.56 | l | 48.86 | q | 58.42 | r | 65.78 | v | 72.90 | t | 81.70 | u | 85.21 | q | 79.00 | q | 66.61 | m | 57.86 | p | 44.63 | l | 40.81 | ||
| 1996 | 37.50 | u | 46.29 | l | 56.19 | o | 59.27 | o | 70.12 | w | ----- | z | ----- | z | ----- | z | ----- | z | 64.29 | q | 49.58 | r | 43.21 | q | 9999.00 | |
| 1997 | 41.77 | i | 47.12 | k | 53.15 | k | 55.42 | k | 76.60 | p | ----- | z | 86.33 | p | 85.62 | o | 76.87 | o | 66.25 | o | 55.36 | p | 43.38 | o | 9999.00 | |
| 1998 | 44.43 | q | 39.32 | 51.61 | 59.38 | i | 56.31 | r | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.22 | l | 39.58 | 43.50 | ||||
| 1999 | 43.52 | 39.60 | m | 51.86 | i | 53.10 | j | ----- | z | 76.73 | o | 88.56 | o | 85.69 | o | 81.47 | o | 72.76 | n | 57.10 | 47.77 | 49.46 | ||||
| 2000 | 42.61 | 45.97 | 52.39 | 67.00 | l | 67.52 | 79.04 | d | ----- | z | 85.76 | n | 75.80 | 62.90 | 46.07 | 45.83 | m | 59.04 | ||||||||
| 2001 | 43.26 | 42.79 | 54.26 | 54.93 | 76.86 | i | 76.10 | i | 85.10 | 87.33 | z | 77.93 | p | 75.12 | o | 51.17 | 37.95 | i | 55.25 | |||||||
| 2002 | 40.26 | 48.18 | 49.45 | i | 69.10 | t | 64.11 | l | 79.30 | ----- | z | ----- | z | 81.00 | o | 62.05 | i | 53.53 | 44.84 | 53.22 | ||||||
| 2003 | 50.39 | 44.21 | 52.06 | 51.27 | 65.65 | 81.53 | ----- | z | ----- | z | 79.78 | g | 72.08 | e | 44.23 | 40.45 | 55.76 | |||||||||
| 2004 | 40.52 | 42.89 | j | 60.52 | 61.47 | m | 67.90 | 79.30 | 88.29 | 84.92 | e | 75.08 | e | 59.32 | f | 45.68 | h | 45.90 | 67.80 | |||||||
| 2005 | 39.65 | 48.18 | 54.10 | 55.37 | 62.45 | 70.30 | 89.19 | ----- | z | 78.12 | n | 64.40 | k | 50.93 | 37.94 | 56.46 | ||||||||||
| 2006 | 41.00 | 45.68 | 43.45 | 49.50 | j | 74.50 | m | 81.13 | 92.26 | d | ----- | z | 84.00 | y | 66.06 | 48.17 | l | 41.55 | 58.73 | |||||||
| 2007 | 41.26 | 46.61 | 58.57 | c | 59.93 | 73.52 | 78.67 | ----- | z | 89.21 | q | 70.00 | j | 60.61 | 54.83 | 37.52 | 56.84 | |||||||||
| 2008 | 35.35 | 45.17 | 49.29 | 59.00 | f | 72.24 | f | 75.97 | 89.90 | 88.21 | q | 81.00 | r | 68.46 | g | 54.72 | e | 39.71 | 55.73 | |||||||
| 2009 | 46.19 | 44.39 | 48.72 | b | 59.84 | k | 71.07 | p | 75.60 | o | 90.80 | p | 100.00 | z | 85.00 | o | 57.71 | n | 52.25 | j | 38.17 | h | 46.44 | |||
| 2010 | 43.74 | 45.96 | 50.57 | h | 55.78 | l | 59.00 | q | 78.08 | q | 89.33 | v | 88.53 | n | 80.06 | n | 68.20 | p | 49.21 | k | 41.71 | g | 44.85 | |||
| 2011 | 42.56 | d | 40.46 | 44.52 | 54.65 | j | 63.67 | p | 63.00 | z | 87.00 | p | 90.25 | w | 85.73 | o | 64.56 | m | 47.81 | d | 45.07 | c | 44.08 | |||
| 2012 | 46.10 | b | 45.61 | a | 49.93 | a | 61.56 | l | 73.25 | o | 81.36 | s | 90.57 | q | 92.88 | n | 90.50 | z | 68.55 | k | 54.95 | h | 39.29 | 45.23 | ||
| 2013 | 35.86 | b | 44.35 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 40.10 | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 42.38 | 45.83 | 52.20 | 59.14 | 69.01 | 78.11 | 88.01 | 86.22 | 77.48 | 66.65 | 51.14 | 42.66 | 63.92 | |||||||||||||
| S.D. | 3.64 | 3.78 | 4.37 | 5.53 | 4.27 | 3.93 | 2.62 | 3.71 | 4.25 | 5.58 | 4.59 | 4.88 | 1.59 | |||||||||||||
| SKEW | 0.24 | -0.14 | 0.19 | 0.10 | -0.01 | 0.04 | -0.18 | -0.80 | -0.27 | 0.17 | 0.55 | 0.45 | 0.98 | |||||||||||||
| MAX | 51.45 | 54.52 | 61.06 | 71.00 | 76.97 | 86.27 | 92.94 | 91.65 | 85.37 | 79.61 | 64.77 | 55.87 | 67.76 | |||||||||||||
| MIN | 35.35 | 38.11 | 43.45 | 47.10 | 60.19 | 70.30 | 82.97 | 78.06 | 67.69 | 57.26 | 43.37 | 34.74 | 61.68 | |||||||||||||
| NO YRS | 44 | 40 | 36 | 34 | 33 | 38 | 36 | 29 | 32 | 32 | 38 | 38 | 16 | |||||||||||||