YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 86.67 | 67.10 | 52.93 | 52.90 | 64.90 | h | ||||
1958 | 50.23 | 55.21 | 50.83 | a | 64.40 | 79.84 | 86.50 | 93.00 | a | 94.10 | 84.70 | 75.74 | 59.87 | 57.84 | 71.02 | |||||||||||
1959 | 51.32 | 47.68 | 61.61 | 73.27 | 74.84 | 89.47 | 97.23 | 89.90 | 81.72 | a | 73.39 | 60.07 | 50.65 | 70.93 | ||||||||||||
1960 | 41.03 | a | 45.31 | c | 62.69 | b | 68.69 | a | 77.03 | 91.17 | 96.87 | 92.50 | a | 87.33 | 71.00 | 57.57 | 48.81 | 70.00 | ||||||||
1961 | 51.97 | 54.04 | 57.10 | 67.43 | 75.90 | 91.70 | 95.26 | 90.93 | b | 78.33 | 71.06 | 53.13 | 45.71 | 69.38 | ||||||||||||
1962 | 46.67 | m | 46.05 | h | 50.94 | 72.77 | 72.03 | 84.73 | 91.23 | 93.06 | 85.93 | 71.77 | 63.23 | 52.52 | 73.82 | b | ||||||||||
1963 | 43.77 | 57.46 | 55.26 | 61.03 | 79.56 | f | 81.90 | 94.10 | 90.16 | 84.67 | 75.13 | 58.17 | 50.33 | a | 68.36 | a | ||||||||||
1964 | 45.71 | 48.24 | 51.42 | 61.90 | 72.81 | 84.27 | 95.06 | 90.55 | 82.03 | 79.35 | 52.27 | 46.45 | 67.51 | |||||||||||||
1965 | 51.68 | 51.75 | 54.58 | 60.63 | 70.58 | 80.10 | 89.10 | 87.48 | 75.17 | 77.58 | 58.63 | 46.55 | 66.99 | |||||||||||||
1966 | 45.74 | 46.36 | 62.16 | 69.33 | 79.87 | 86.53 | 91.97 | 92.68 | 83.27 | 71.55 | 60.03 | 48.58 | 69.84 | |||||||||||||
1967 | 47.32 | 55.50 | 58.39 | 56.37 | 72.97 | 79.77 | 92.52 | 92.58 | 80.87 | 73.23 | 60.30 | 41.93 | p | 69.98 | a | |||||||||||
1968 | 45.58 | 56.59 | 59.16 | 62.33 | 75.10 | 87.00 | 90.39 | c | 84.62 | b | 81.96 | e | 70.21 | b | 57.83 | 45.48 | 68.02 | |||||||||
1969 | 47.90 | b | 46.33 | d | 53.29 | c | 67.79 | a | 78.10 | b | 82.52 | c | ----- | z | 93.97 | 84.64 | b | 65.24 | b | 59.12 | d | 51.57 | c | 66.41 | a | |
1970 | 47.45 | b | 57.04 | 54.57 | c | 59.96 | d | 77.85 | d | 87.58 | d | 94.00 | 91.94 | 80.73 | d | 68.34 | b | 58.87 | 46.76 | b | 68.76 | |||||
1971 | 48.77 | 50.57 | 59.77 | e | 65.70 | 69.16 | 86.59 | a | 95.39 | c | 89.29 | 81.08 | d | 65.73 | a | 55.48 | c | 41.87 | a | 67.45 | ||||||
1972 | 47.00 | 56.07 | 68.93 | c | 66.18 | b | 78.71 | 87.00 | c | 95.89 | c | 90.77 | 79.42 | d | 64.56 | d | 49.32 | b | 42.64 | c | 68.87 | |||||
1973 | 37.72 | b | 47.68 | 49.07 | d | 62.86 | a | 77.07 | a | 85.10 | a | 92.52 | 91.66 | b | 82.30 | 73.87 | 56.25 | b | 51.75 | c | 67.32 | |||||
1974 | 40.90 | a | 49.73 | b | 61.69 | e | 67.30 | 81.96 | d | 94.30 | c | 92.22 | d | 91.31 | b | 86.35 | d | 73.15 | d | 57.81 | d | 46.97 | a | 70.31 | ||
1975 | 46.93 | d | 47.85 | a | 52.04 | e | 58.12 | d | 69.68 | c | 83.56 | e | 92.61 | c | 90.30 | d | 85.87 | 70.13 | 59.27 | d | 51.41 | b | 67.31 | |||
1976 | 51.07 | a | 53.24 | 56.15 | d | 61.92 | d | 78.81 | d | 84.78 | c | 91.53 | a | 87.37 | d | 81.00 | c | 69.35 | 64.00 | c | 54.16 | 69.45 | ||||
1977 | 46.69 | e | 58.17 | d | 53.33 | d | 70.37 | c | 66.54 | e | 88.35 | d | 92.19 | e | 91.07 | d | 82.23 | d | 75.35 | e | 61.67 | c | 53.63 | d | 69.97 | |
1978 | 46.04 | e | 50.62 | d | 59.30 | d | 63.24 | e | 71.59 | d | 86.56 | c | 92.56 | f | 89.96 | d | 79.27 | d | 75.42 | e | 53.27 | d | 43.07 | d | 65.30 | a |
1979 | 37.63 | d | 45.96 | c | 56.04 | d | 64.16 | e | 74.41 | d | 86.27 | d | 93.12 | e | 87.81 | d | 88.60 | e | 75.78 | d | 53.63 | c | 52.48 | 67.99 | ||
1980 | 47.06 | 53.24 | 51.35 | 65.13 | 68.38 | b | 84.20 | 91.81 | 88.58 | 81.87 | 71.39 | 60.13 | 57.06 | 68.35 | ||||||||||||
1981 | 53.26 | 55.54 | 55.29 | 69.73 | 74.52 | 89.40 | 94.13 | 92.45 | 83.83 | 67.13 | 61.17 | a | 53.27 | a | 70.81 | |||||||||||
1982 | 44.42 | 50.64 | 53.23 | a | 63.10 | 75.13 | 84.33 | 89.29 | 88.90 | 80.10 | a | 66.13 | a | 52.10 | a | 44.61 | 66.00 | |||||||||
1983 | 49.68 | 50.96 | 52.77 | 56.86 | b | 72.23 | 83.70 | 90.81 | 87.90 | 84.00 | 69.77 | 54.93 | 47.69 | b | 66.78 | |||||||||||
1984 | 48.17 | a | 52.62 | 58.94 | 63.07 | 83.39 | 85.53 | 91.10 | 87.65 | 85.20 | 63.37 | a | 56.67 | 44.10 | 68.32 | |||||||||||
1985 | 46.03 | 47.57 | 55.97 | 70.87 | 78.29 | 89.30 | 95.84 | 92.06 | 78.40 | 69.71 | 51.83 | 50.68 | 68.88 | |||||||||||||
1986 | 56.93 | b | 54.29 | 62.74 | 66.13 | 78.16 | 90.67 | 90.81 | 91.94 | 76.97 | 68.55 | 57.03 | 49.68 | 70.32 | ||||||||||||
1987 | 45.29 | 49.36 | 52.65 | 70.83 | a | 74.55 | 88.50 | 88.87 | a | 89.55 | 83.27 | 73.16 | 53.70 | 42.32 | 67.67 | |||||||||||
1988 | 44.10 | 53.72 | 57.97 | 64.23 | 75.33 | a | 88.50 | 94.52 | 89.10 | 82.10 | 79.00 | 57.20 | 47.53 | a | 69.44 | |||||||||||
1989 | 42.97 | a | 48.82 | 64.48 | 74.43 | 75.77 | 87.17 | 94.55 | 86.80 | a | 83.83 | 70.84 | 61.67 | 52.26 | 70.30 | |||||||||||
1990 | 48.35 | 46.25 | 60.16 | 68.53 | 73.90 | 87.10 | 91.42 | 88.48 | 84.20 | 72.06 | 57.97 | 41.42 | 68.32 | |||||||||||||
1991 | 45.45 | 60.43 | 50.06 | 64.60 | 71.90 | 80.13 | 93.26 | 90.42 | 82.83 | 75.00 | 56.30 | 47.45 | 68.15 | |||||||||||||
1992 | 46.84 | 52.43 | a | 55.90 | 69.97 | 76.42 | ----- | z | 88.10 | 90.81 | 84.27 | 73.94 | 54.50 | 41.76 | b | 66.81 | a | |||||||||
1993 | 44.26 | 46.11 | 59.39 | 66.03 | 76.52 | 81.53 | 88.61 | 89.23 | 83.17 | 70.52 | 53.17 | a | 48.55 | 67.26 | ||||||||||||
1994 | 52.84 | 46.32 | 62.65 | 65.33 | 74.00 | 90.53 | 94.23 | 92.39 | 85.07 | 68.58 | 48.07 | 47.94 | 68.99 | |||||||||||||
1995 | 44.61 | 61.82 | 55.48 | 61.23 | 68.19 | 79.17 | 90.97 | a | 91.48 | 85.63 | 73.65 | 64.20 | 52.00 | 69.04 | ||||||||||||
1996 | 49.94 | 55.17 | 60.19 | 68.43 | 79.16 | 90.27 | 94.84 | 94.06 | 80.97 | 69.90 | 56.47 | 48.03 | 70.62 | |||||||||||||
1997 | 44.52 | 52.07 | a | 64.19 | 62.70 | 80.81 | 84.53 | 90.48 | 89.61 | 80.63 | c | 72.95 | i | 60.14 | a | 45.85 | d | 68.69 | a | |||||||
1998 | 49.18 | c | 45.48 | e | 57.12 | e | 60.48 | e | 70.08 | e | 80.70 | c | 91.93 | d | 91.86 | c | 81.38 | f | 66.96 | d | 57.17 | f | 51.64 | f | 68.20 | c |
1999 | 53.67 | d | 54.86 | f | 63.80 | f | 59.19 | c | 75.89 | d | 83.96 | c | 87.78 | d | 88.72 | b | 83.62 | d | 78.36 | c | 67.40 | e | 51.50 | e | 73.01 | b |
2000 | 50.83 | g | 54.60 | i | 59.33 | g | 72.80 | e | 80.50 | e | 89.63 | c | 92.57 | a | 91.19 | d | 83.28 | a | 68.23 | e | 49.69 | d | 53.29 | g | 78.49 | d |
2001 | 45.96 | f | 50.65 | e | 60.15 | d | 63.96 | c | 84.00 | e | 90.62 | f | 91.34 | b | 91.96 | c | 87.17 | a | 76.30 | a | 60.54 | d | 44.53 | a | 71.06 | b |
2002 | 47.50 | g | 56.19 | b | 58.85 | d | 73.12 | e | 80.60 | f | 92.22 | c | 96.37 | a | 92.82 | c | 83.60 | j | 70.59 | i | 60.05 | h | 47.58 | e | 73.88 | e |
2003 | 57.89 | c | 51.00 | g | 58.81 | e | 63.72 | e | 78.90 | b | 89.54 | b | 98.39 | c | 91.38 | b | 87.08 | d | 79.89 | d | 54.08 | d | 49.24 | f | 75.97 | b |
2004 | 47.86 | c | 45.89 | b | 67.61 | c | 66.48 | c | 78.70 | d | 88.72 | e | 93.03 | a | 89.43 | a | 82.56 | c | 65.09 | h | 53.32 | e | 49.57 | c | 69.38 | a |
2005 | ----- | z | ----- | z | 56.55 | b | 65.08 | f | 77.42 | e | 83.72 | a | 96.87 | a | 87.89 | c | 82.90 | a | 72.12 | f | 61.18 | b | 51.48 | d | 74.75 | d |
2006 | 51.35 | e | 56.58 | b | 53.48 | d | 68.08 | d | 82.00 | c | 91.71 | b | 93.93 | c | ----- | z | ----- | z | 68.83 | g | 61.31 | d | 49.00 | d | 67.49 | c |
2007 | ----- | z | 56.15 | b | ----- | z | 71.28 | e | 81.96 | d | 91.48 | a | 95.61 | c | ----- | z | 83.64 | e | 70.75 | c | 65.00 | f | 44.00 | f | 78.70 | e |
2008 | 45.56 | f | 50.58 | c | 62.29 | g | 67.48 | e | 73.40 | f | 90.04 | c | 94.16 | f | 92.39 | h | 85.96 | c | 72.58 | e | 61.08 | e | 42.63 | l | 71.29 | f |
2009 | 52.22 | h | 50.39 | e | 59.69 | e | 66.55 | h | 82.82 | c | 83.04 | e | 95.14 | c | 92.23 | e | 87.18 | h | 67.96 | e | 61.87 | g | 41.72 | f | 75.90 | e |
2010 | 47.00 | e | 49.17 | d | 57.08 | g | 63.35 | d | 70.36 | f | 94.17 | x | 95.20 | a | 89.00 | 86.30 | j | 68.70 | d | 55.40 | ----- | z | 66.83 | e | ||
2011 | ----- | z | 48.30 | a | 56.97 | 62.55 | a | 68.77 | a | 84.97 | 90.29 | 93.61 | 85.50 | 69.87 | 54.57 | 47.48 | 69.35 | a | ||||||||
2012 | 52.13 | 50.45 | 60.55 | 67.60 | 79.87 | 90.03 | 90.35 | 91.03 | 84.13 | 72.71 | 61.33 | 45.79 | b | 70.50 | ||||||||||||
2013 | 46.33 | s | 49.86 | 63.23 | a | 71.17 | a | 76.84 | 91.52 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.52 | g | ||
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 61.28 | l | 51.03 | 51.03 | k | |
2015 | 53.42 | 60.18 | 64.61 | 65.40 | 71.29 | 91.03 | 89.13 | 91.77 | 87.53 | 75.71 | 55.20 | 48.35 | 71.14 | |||||||||||||
2016 | 46.68 | 59.34 | 65.58 | ----- | z | ----- | z | ----- | z | 95.03 | 90.87 | ----- | z | 75.16 | ----- | z | 49.26 | 68.85 | e | |||||||
2017 | 46.29 | 50.32 | 64.74 | 67.77 | 76.94 | 91.27 | 94.97 | 92.68 | ----- | z | 73.16 | 64.88 | d | ----- | z | 72.30 | b | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.60 | 51.82 | 57.96 | 65.74 | 75.88 | 86.80 | 92.87 | 90.58 | 83.15 | 71.72 | 57.41 | 48.63 | 68.91 | |||||||||||||
S.D. | 4.20 | 4.38 | 4.73 | 4.32 | 4.26 | 3.71 | 2.54 | 2.04 | 2.81 | 3.90 | 4.16 | 3.82 | 1.39 | |||||||||||||
SKEW | 0.04 | 0.37 | 0.18 | -0.01 | -0.19 | -0.22 | -0.04 | -0.46 | -0.48 | 0.07 | -0.02 | 0.08 | -0.10 | |||||||||||||
MAX | 57.89 | 61.82 | 68.93 | 74.43 | 84.00 | 94.30 | 98.39 | 94.10 | 88.60 | 79.89 | 67.40 | 57.84 | 71.14 | |||||||||||||
MIN | 37.63 | 45.31 | 49.07 | 56.37 | 66.54 | 79.17 | 87.78 | 84.62 | 75.17 | 63.37 | 48.07 | 41.42 | 66.00 | |||||||||||||
YRS | 49 | 54 | 54 | 56 | 54 | 55 | 55 | 55 | 52 | 54 | 54 | 51 | 35 |