YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.32 | k | 90.66 | b | 86.78 | k | 81.72 | 68.38 | a | 58.98 | a | 48.26 | 69.60 | g | ||
1954 | 49.08 | 60.07 | 54.17 | h | 68.23 | b | 75.39 | d | 81.14 | h | 90.83 | b | 85.58 | a | 81.27 | 71.66 | 60.95 | 50.61 | c | 69.37 | b | |||||
1955 | 46.08 | 47.77 | 56.66 | 62.04 | d | 71.50 | d | 80.70 | c | 85.33 | d | 86.75 | c | 80.42 | 72.29 | 56.52 | d | 50.29 | l | 67.82 | a | |||||
1956 | 53.19 | 48.02 | 58.08 | 64.57 | 74.65 | a | 82.79 | d | 88.21 | 85.73 | 83.70 | 67.29 | 53.83 | i | 52.16 | 68.94 | a | |||||||||
1957 | ----- | z | 59.18 | q | 59.25 | a | 64.93 | 70.08 | 86.25 | 90.31 | 86.95 | 80.97 | 66.00 | 52.22 | 51.52 | 70.85 | b | |||||||||
1958 | 50.02 | 54.29 | 52.53 | 61.25 | 76.47 | a | 83.23 | 87.47 | 90.15 | 81.67 | 72.23 | 56.13 | 53.29 | 68.23 | ||||||||||||
1959 | 50.06 | 49.68 | 59.15 | 68.93 | 73.10 | 86.67 | 92.42 | 86.63 | 78.17 | 69.94 | 57.55 | 49.85 | 68.51 | |||||||||||||
1960 | 43.73 | 47.24 | 59.85 | 65.72 | 72.61 | 86.23 | 90.23 | 88.68 | 82.38 | 67.82 | 55.75 | 48.19 | 67.37 | |||||||||||||
1961 | 49.79 | 53.41 | 56.26 | 65.85 | 72.61 | 86.90 | 90.69 | 87.00 | 77.27 | 67.06 | 54.23 | 47.00 | 67.34 | |||||||||||||
1962 | 48.19 | 51.84 | 52.11 | 69.62 | 69.65 | 80.05 | 87.34 | 88.89 | 82.30 | 69.98 | 60.35 | 51.32 | 67.64 | |||||||||||||
1963 | 45.32 | 58.00 | 55.03 | 60.23 | 74.95 | 78.38 | 89.15 | 87.32 | 81.87 | 70.65 | 56.57 | 48.08 | 67.13 | |||||||||||||
1964 | 45.02 | 47.10 | 53.21 | 61.17 | 70.08 | 80.43 | 88.21 | 85.63 | 78.85 | 73.37 | 52.03 | 48.24 | 65.28 | |||||||||||||
1965 | ----- | z | 51.36 | 54.19 | 60.23 | 68.60 | a | 75.68 | 86.23 | 86.89 | 74.73 | 71.53 | 57.98 | 47.42 | 66.80 | a | ||||||||||
1966 | 44.89 | 46.52 | 57.42 | 65.18 | 75.21 | 81.43 | 87.39 | 89.06 | 81.58 | 67.63 | 57.15 | 49.00 | 66.87 | |||||||||||||
1967 | 48.73 | 53.35 | d | 58.66 | 56.53 | 72.03 | 79.28 | 90.29 | 88.66 | 80.02 | 71.03 | 59.82 | 44.34 | 66.90 | ||||||||||||
1968 | 48.58 | 56.79 | 57.97 | 62.32 | 72.05 | 81.92 | 86.81 | 83.50 | 80.18 | 68.74 | 57.00 | 44.24 | 66.67 | |||||||||||||
1969 | 51.95 | 49.95 | 54.27 | a | 64.45 | 75.74 | 81.02 | 89.48 | 91.84 | 83.12 | b | 65.26 | 58.52 | a | 50.60 | 68.02 | ||||||||||
1970 | 47.73 | 55.69 | a | 56.18 | 59.63 | 74.68 | 83.58 | 91.02 | 89.65 | 78.20 | 66.68 | 58.32 | 47.68 | 67.42 | ||||||||||||
1971 | 49.85 | a | 52.34 | 57.62 | a | 62.57 | 68.66 | 81.15 | 90.87 | 86.21 | 80.07 | 64.34 | 55.23 | 46.11 | 66.25 | |||||||||||
1972 | 47.07 | b | 53.98 | b | 64.44 | 65.17 | d | 74.97 | b | 81.64 | b | 89.93 | a | 85.74 | b | 78.63 | 63.84 | 51.17 | 44.06 | 66.72 | ||||||
1973 | 43.44 | 50.23 | 49.10 | 58.39 | c | 72.90 | a | 78.62 | a | 88.18 | c | 84.25 | c | 75.68 | 67.48 | a | 53.63 | 49.10 | 64.25 | |||||||
1974 | 44.20 | a | 49.62 | 57.26 | 61.97 | a | 74.41 | c | 85.03 | a | 84.29 | b | 82.61 | 81.78 | a | 68.22 | a | 55.41 | b | 44.26 | b | 65.76 | ||||
1975 | 46.50 | e | 48.05 | 50.94 | e | 54.90 | 68.35 | e | 79.88 | d | 88.42 | a | 84.70 | a | 80.20 | 65.73 | 52.97 | 48.62 | a | 64.10 | ||||||
1976 | 49.06 | d | 53.43 | 52.96 | e | 58.59 | b | 73.84 | 80.07 | 86.79 | g | 82.63 | 76.58 | d | 65.19 | e | 55.95 | a | 46.02 | 63.12 | a | |||||
1977 | 46.48 | a | 52.74 | a | 50.24 | 64.85 | 65.53 | a | 82.89 | c | 88.87 | 87.48 | b | 79.67 | a | 71.85 | a | 58.33 | a | 52.91 | c | 66.82 | ||||
1978 | 48.16 | b | 51.29 | 58.87 | 60.36 | b | 69.12 | b | 82.73 | 86.72 | a | 86.71 | 76.24 | a | 72.67 | a | 53.70 | 42.18 | a | 65.73 | ||||||
1979 | 41.34 | 47.72 | a | 53.85 | 61.27 | b | 71.78 | a | 81.43 | b | 86.98 | 83.08 | a | 83.15 | 70.11 | 52.45 | 49.82 | a | 65.25 | |||||||
1980 | 51.74 | 53.97 | 52.45 | b | 62.07 | 68.32 | 80.25 | 89.48 | 87.16 | 80.53 | 68.47 | 57.43 | 54.26 | 67.18 | ||||||||||||
1981 | 51.45 | a | 52.93 | a | 55.50 | 68.28 | 72.34 | 87.22 | 91.15 | 89.15 | 81.38 | 65.13 | 58.37 | 49.85 | 68.56 | |||||||||||
1982 | 46.68 | 52.45 | 54.79 | c | 63.07 | 71.33 | a | 79.67 | a | 87.27 | 87.40 | b | 78.45 | 64.65 | 53.61 | b | 45.17 | b | 65.38 | |||||||
1983 | 49.00 | 52.30 | 55.71 | 58.61 | b | 72.06 | 81.37 | 89.50 | 84.84 | 83.27 | 69.29 | 57.79 | b | 50.00 | 66.98 | |||||||||||
1984 | 50.85 | 51.05 | 58.29 | b | 62.35 | 79.16 | 82.77 | 88.23 | 86.16 | 82.02 | 62.94 | 53.97 | 46.60 | b | 67.03 | |||||||||||
1985 | 45.06 | 49.12 | 54.10 | 66.70 | b | 73.94 | 82.85 | 89.05 | 86.77 | 73.38 | b | 66.94 | 52.38 | 49.29 | 65.80 | |||||||||||
1986 | 53.03 | 54.16 | 59.81 | 64.00 | 72.89 | 84.13 | 86.15 | 88.24 | 73.73 | 64.32 | 55.93 | 47.06 | 66.96 | |||||||||||||
1987 | 45.57 | a | 51.12 | 53.26 | 67.42 | 72.27 | 82.52 | 84.65 | 85.76 | 78.07 | 69.60 | 54.08 | 42.42 | 65.56 | ||||||||||||
1988 | 46.26 | 53.00 | 55.69 | 63.73 | 72.37 | 84.43 | 90.95 | 85.73 | 78.82 | 75.00 | 57.93 | b | 48.69 | 67.72 | ||||||||||||
1989 | 49.26 | 53.21 | b | 63.06 | 72.77 | 76.16 | 84.62 | 91.82 | 88.00 | 81.62 | 68.95 | 60.58 | 50.97 | 70.09 | ||||||||||||
1990 | 47.92 | 51.04 | b | 60.29 | 68.00 | 74.27 | 86.13 | 90.56 | 87.16 | 82.52 | 71.24 | 57.98 | 46.86 | f | 70.65 | a | ||||||||||
1991 | 47.84 | 59.02 | 52.23 | 63.27 | 70.15 | 80.93 | 89.87 | 89.21 | 82.67 | 73.26 | 57.70 | 49.65 | 67.98 | |||||||||||||
1992 | 49.85 | 55.98 | 57.26 | 67.72 | 76.47 | 83.05 | 89.26 | 90.05 | 83.90 | 72.42 | 54.63 | 46.40 | 68.92 | |||||||||||||
1993 | 49.08 | 50.34 | 59.24 | 65.27 | 74.97 | 81.73 | 89.15 | 89.68 | 82.33 | 69.98 | 54.47 | 49.66 | 67.99 | |||||||||||||
1994 | 51.10 | 50.73 | 61.95 | b | 67.11 | b | 72.85 | 88.23 | 90.84 | 92.32 | 84.23 | 67.53 | 51.02 | 49.65 | 68.96 | |||||||||||
1995 | 48.63 | 57.66 | 56.26 | 61.65 | 71.00 | 82.25 | 90.73 | 92.61 | 85.90 | 71.63 | 63.82 | 53.48 | 69.63 | |||||||||||||
1996 | 52.52 | 56.46 | b | 59.95 | 69.08 | 77.85 | 87.03 | 94.68 | 92.85 | 81.87 | 70.35 | 59.93 | 52.47 | 71.25 | ||||||||||||
1997 | 51.55 | a | 53.07 | 64.12 | j | ----- | z | 84.45 | k | 84.60 | 89.23 | 91.37 | 85.20 | 68.66 | 58.60 | 48.15 | 70.05 | c | ||||||||
1998 | 50.90 | 50.43 | 56.89 | 60.85 | 70.13 | 80.50 | 91.76 | 90.92 | 80.92 | 67.74 | 56.95 | 50.19 | 67.35 | |||||||||||||
1999 | 53.32 | 54.64 | 59.68 | 60.87 | 73.53 | 84.10 | 88.39 | 88.40 | 82.87 | 73.02 | 61.92 | 51.79 | 69.38 | |||||||||||||
2000 | 53.44 | 56.09 | 59.61 | 70.45 | 80.65 | 87.80 | 91.95 | 89.79 | 82.77 | 68.50 | 52.62 | 52.82 | 70.54 | |||||||||||||
2001 | 48.71 | 51.38 | 59.77 | 64.90 | 81.03 | 86.95 | 89.31 | 90.02 | 84.38 | 72.76 | 60.20 | 46.69 | 69.67 | |||||||||||||
2002 | 49.32 | 54.68 | 57.23 | 68.83 | 75.43 | a | 87.10 | 92.81 | g | 90.23 | 83.05 | 68.52 | 60.47 | 49.32 | 67.65 | a | ||||||||||
2003 | 57.32 | 52.79 | 58.23 | 63.12 | 77.15 | 86.33 | 93.60 | 90.55 | 85.50 | 76.39 | 53.07 | 49.06 | 70.26 | |||||||||||||
2004 | 49.84 | 49.31 | 66.76 | 66.40 | 76.87 | 83.92 | 89.98 | 88.35 | 80.03 | 66.71 | 52.42 | 49.27 | 68.32 | |||||||||||||
2005 | 49.84 | 51.41 | 55.50 | 62.02 | 74.66 | 81.73 | d | 91.21 | b | 87.42 | a | 79.50 | b | 70.19 | 59.25 | 47.24 | n | 69.34 | a | |||||||
2006 | 49.92 | e | 54.78 | a | 51.08 | e | 63.98 | 76.81 | 85.73 | h | 94.93 | h | 89.23 | 81.32 | e | 69.25 | c | 60.23 | 48.29 | b | 64.49 | b | ||||
2007 | 46.69 | 55.21 | 62.57 | b | 68.35 | c | 78.76 | 83.66 | k | 92.84 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.40 | f | ||||
2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2009 | ----- | z | ----- | z | 56.93 | a | 63.53 | 79.87 | 80.92 | 91.89 | 86.56 | 84.63 | 66.45 | 59.28 | 46.05 | 71.61 | b | |||||||||
2010 | 50.39 | 52.59 | 55.35 | 61.62 | 69.18 | 83.80 | 92.40 | 88.08 | 82.73 | 70.74 | 56.62 | 53.06 | 68.05 | |||||||||||||
2011 | 50.05 | 49.25 | 59.16 | 65.92 | 69.95 | 82.73 | 89.71 | 92.03 | 83.30 | 71.50 | 55.90 | 47.05 | 68.05 | |||||||||||||
2012 | 51.53 | 53.88 | 58.60 | 67.68 | 77.48 | h | 85.92 | 88.47 | 90.15 | 83.90 | 71.81 | 60.83 | 50.03 | 69.34 | a | |||||||||||
2013 | 47.12 | a | 50.22 | a | 62.35 | 67.10 | 76.32 | 87.22 | 91.29 | b | 87.29 | 80.02 | a | 67.05 | 58.52 | 50.79 | 68.77 | |||||||||
2014 | 55.65 | d | 57.85 | d | 62.31 | b | 65.29 | i | 75.71 | c | 85.27 | d | 90.62 | f | 85.44 | e | 82.43 | c | 72.72 | b | 59.07 | a | 51.57 | b | 68.80 | b |
2015 | 51.84 | b | 57.89 | i | 63.70 | h | 66.04 | e | 70.89 | h | 85.86 | e | ----- | z | 90.48 | a | ----- | z | 68.75 | u | 53.73 | f | 46.40 | e | 68.13 | g |
2016 | 48.44 | e | 56.13 | f | 61.02 | c | 66.58 | 74.54 | f | 89.65 | d | 92.34 | 88.09 | b | 79.54 | f | 72.74 | b | 60.23 | b | 49.17 | a | 69.81 | c | ||
2017 | 48.76 | 56.41 | a | 63.03 | b | 64.71 | k | 73.82 | 86.93 | 91.56 | d | 89.42 | 80.12 | e | 72.31 | j | 63.15 | f | 56.56 | w | 73.76 | d | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 48.98 | 52.53 | 57.20 | 64.14 | 73.51 | 83.31 | 89.59 | 87.89 | 80.95 | 69.24 | 56.78 | 48.82 | 67.52 | |||||||||||||
S.D. | 3.00 | 3.15 | 3.70 | 3.59 | 3.31 | 2.91 | 2.17 | 2.44 | 2.78 | 2.96 | 3.00 | 2.77 | 1.62 | |||||||||||||
SKEW | 0.07 | 0.21 | 0.08 | -0.13 | 0.11 | -0.03 | -0.28 | -0.07 | -0.76 | -0.01 | -0.08 | -0.29 | 0.09 | |||||||||||||
MAX | 57.32 | 60.07 | 66.76 | 72.77 | 81.03 | 89.65 | 94.68 | 92.85 | 85.90 | 76.39 | 63.82 | 54.26 | 71.25 | |||||||||||||
MIN | 41.34 | 46.52 | 49.10 | 54.90 | 65.53 | 75.68 | 84.29 | 82.61 | 73.38 | 62.94 | 51.02 | 42.18 | 64.10 | |||||||||||||
YRS | 60 | 59 | 60 | 60 | 59 | 60 | 59 | 62 | 61 | 61 | 60 | 59 | 45 |