YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.67 | v | 52.52 | 41.56 | 47.04 | j | ||
1952 | 41.52 | 47.72 | 49.81 | 63.82 | 72.90 | 76.75 | 86.85 | 88.82 | 80.73 | 70.29 | 51.28 | 46.53 | 64.75 | |||||||||||||
1953 | 49.66 | 48.41 | 56.38 | a | 62.58 | 66.34 | 79.43 | 89.79 | 86.19 | 79.67 | 67.02 | 54.95 | 42.45 | 65.24 | ||||||||||||
1954 | 43.73 | 53.45 | 51.45 | a | 64.90 | 76.19 | e | 80.00 | 89.85 | 84.00 | 79.43 | 67.67 | b | 55.52 | a | 43.87 | 65.84 | |||||||||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 88.50 | r | 87.69 | b | 81.00 | 68.63 | 51.83 | a | 46.16 | b | 67.06 | g | ||
1956 | 39.50 | a | 42.48 | 56.62 | r | ----- | z | ----- | z | ----- | z | ----- | z | 83.62 | j | 78.42 | 67.52 | f | 50.94 | n | 47.42 | 51.95 | h | |||
1957 | 46.02 | 57.50 | 57.79 | 63.38 | 69.79 | 83.22 | 87.92 | 84.47 | 74.80 | 63.73 | 50.38 | a | 46.12 | a | 65.43 | |||||||||||
1958 | 45.00 | a | 52.41 | 51.55 | 60.03 | 73.94 | 77.97 | 81.37 | 86.37 | ----- | z | ----- | z | ----- | z | ----- | z | 66.08 | d | |||||||
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.83 | v | 84.95 | c | 74.02 | i | ----- | z | 52.09 | a | 47.29 | 61.44 | i | |
1960 | 39.96 | f | 43.25 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.48 | d | 64.53 | 53.18 | e | ----- | z | 66.06 | i | |
1961 | 46.62 | o | 49.92 | o | ----- | z | ----- | z | ----- | z | ----- | z | 88.32 | t | 86.03 | 74.22 | a | 64.19 | b | ----- | z | ----- | z | 74.82 | i | |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 81.17 | r | 87.68 | 87.60 | 80.02 | ----- | z | ----- | z | ----- | z | 85.10 | i | |||
1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 80.64 | a | 63.83 | m | 55.67 | 47.50 | a | 61.27 | i | |
1967 | 44.58 | a | 49.42 | b | 57.58 | 56.32 | ----- | z | 76.20 | e | 91.33 | a | 90.89 | 80.05 | a | 72.00 | i | 57.30 | 38.91 | c | 64.26 | b | ||||
1968 | 45.29 | 56.16 | g | 56.85 | e | 61.21 | k | 72.43 | b | 82.80 | j | 88.26 | 84.02 | 78.95 | a | 69.64 | f | 53.00 | 40.87 | 64.96 | d | |||||
1969 | 46.02 | 46.77 | 50.71 | 64.42 | 69.35 | 81.03 | 87.35 | 92.34 | 81.48 | a | 60.21 | 55.78 | 46.12 | a | 65.13 | |||||||||||
1970 | 44.82 | 53.80 | 52.26 | 57.60 | 74.47 | 84.10 | 89.60 | 89.60 | 76.70 | c | 65.37 | 55.83 | 45.30 | a | 65.79 | |||||||||||
1971 | 45.17 | d | 48.32 | 55.08 | 61.72 | 68.37 | 81.33 | 90.79 | 88.95 | 77.10 | 63.06 | 51.85 | 41.27 | a | 64.42 | |||||||||||
1972 | 41.50 | 49.98 | 62.45 | 64.64 | a | 72.88 | a | 83.60 | 90.12 | a | 85.77 | 77.42 | e | 65.08 | 48.62 | 42.13 | a | 65.35 | ||||||||
1973 | 40.21 | c | 49.41 | 50.68 | 59.19 | a | 75.29 | 83.68 | 89.75 | a | 85.18 | 77.78 | 67.48 | 53.03 | a | 45.40 | 64.76 | |||||||||
1974 | 41.53 | 46.74 | a | 58.93 | a | 61.12 | 75.93 | a | 86.18 | 87.66 | 85.87 | 82.95 | 69.42 | 53.91 | a | 41.71 | 66.00 | |||||||||
1975 | 42.31 | 47.93 | 49.76 | 56.47 | 67.87 | 80.68 | 88.71 | 84.39 | 82.28 | 65.42 | 51.97 | 49.05 | 63.90 | |||||||||||||
1976 | 45.89 | 52.07 | 54.10 | 60.98 | 74.98 | 80.75 | 88.53 | 83.55 | 78.10 | 64.71 | 55.93 | 45.61 | 65.43 | |||||||||||||
1977 | 45.65 | 53.23 | 51.98 | 66.22 | 66.60 | 82.28 | 85.71 | 86.90 | e | 78.22 | 70.32 | 55.05 | 50.29 | 66.04 | ||||||||||||
1978 | 47.81 | 51.70 | 59.53 | 60.82 | 70.55 | 81.42 | 85.85 | 85.21 | 77.62 | 71.23 | 52.68 | 41.84 | 65.52 | |||||||||||||
1979 | 39.71 | 45.89 | 54.52 | 61.62 | 72.52 | 81.05 | 85.63 | 82.08 | 82.10 | 69.55 | 52.45 | 48.29 | 64.62 | |||||||||||||
1980 | 48.95 | 53.31 | 52.74 | 62.85 | 69.23 | 79.45 | 87.42 | a | 84.50 | 79.33 | 68.10 | 55.48 | 52.77 | 66.18 | ||||||||||||
1981 | 50.19 | 51.41 | 55.17 | a | 67.60 | 71.76 | 85.72 | 90.02 | 87.60 | 80.58 | 63.45 | 57.75 | 49.31 | 67.55 | ||||||||||||
1982 | 44.63 | 52.24 | a | 54.84 | 62.23 | 72.97 | a | 79.90 | 86.31 | 87.32 | 77.98 | 62.52 | 51.92 | 43.71 | 64.71 | |||||||||||
1983 | 47.06 | 50.41 | 54.81 | 57.57 | 70.97 | 81.05 | 86.90 | a | 85.40 | 81.58 | 67.26 | 54.57 | a | 45.76 | 65.28 | |||||||||||
1984 | 46.82 | 49.21 | 56.24 | 62.80 | 78.11 | 81.87 | 88.65 | 86.71 | 81.00 | 61.27 | 52.00 | 45.23 | 65.83 | |||||||||||||
1985 | 44.82 | 46.91 | 55.19 | 67.95 | 74.18 | 84.67 | a | 90.32 | 86.44 | 74.33 | a | 66.15 | 50.90 | 47.97 | 65.82 | |||||||||||
1986 | 52.82 | 53.45 | 61.81 | 65.05 | a | 74.31 | 85.90 | 86.05 | 88.63 | 73.30 | 65.31 | 54.73 | 46.06 | 67.28 | ||||||||||||
1987 | 43.87 | 50.18 | 54.10 | a | 68.47 | 73.30 | a | 84.70 | 85.43 | a | 87.55 | 79.67 | 70.48 | 53.30 | 41.73 | 66.06 | ||||||||||
1988 | 43.45 | a | 51.36 | 55.19 | 63.45 | 71.43 | a | 83.80 | 89.94 | 85.15 | 76.77 | 73.27 | 54.08 | 46.35 | 66.19 | |||||||||||
1989 | 43.81 | 48.61 | 60.65 | 70.05 | 73.32 | 81.10 | 89.50 | 83.67 | a | 78.38 | 66.08 | a | 55.97 | 46.79 | 66.49 | |||||||||||
1990 | 45.02 | 48.07 | 59.48 | a | 66.72 | 71.58 | a | 82.10 | a | 87.82 | a | 83.94 | 79.07 | 64.72 | a | 52.15 | 36.92 | a | 64.80 | |||||||
1991 | 41.04 | h | 52.25 | j | 47.40 | j | 57.50 | d | 64.66 | c | 74.46 | b | 86.58 | y | 85.76 | j | 77.82 | b | 70.14 | b | 53.38 | f | 44.96 | h | 68.92 | g |
1992 | 44.00 | k | 52.77 | c | 55.31 | e | 66.32 | 74.05 | c | 79.52 | 84.59 | b | 88.07 | a | 79.18 | b | 68.43 | c | 49.62 | e | 41.02 | f | 69.78 | b | ||
1993 | 45.00 | f | 48.20 | f | ----- | z | 63.09 | a | 74.08 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 49.17 | 44.18 | a | 57.63 | h | |
1994 | 46.54 | c | 45.72 | a | 58.53 | b | 63.73 | 73.80 | a | 84.68 | 88.63 | 90.74 | b | 81.38 | 65.23 | 47.57 | a | 46.60 | 66.10 | |||||||
1995 | ----- | z | ----- | z | ----- | z | 59.87 | k | 61.44 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | 53.76 | l | 58.95 | 67.45 | 75.87 | 87.00 | a | 93.65 | 91.48 | 80.62 | d | 66.95 | b | 58.68 | h | 47.00 | 74.33 | c | ||||||
1997 | 46.74 | 50.23 | 61.81 | 63.02 | 80.89 | 83.07 | 88.81 | 90.39 | 81.95 | 67.02 | 56.00 | 45.42 | 67.94 | |||||||||||||
1998 | 48.05 | 47.86 | 55.61 | 60.07 | 69.39 | 78.69 | a | 90.67 | a | 91.32 | a | 78.27 | b | 65.00 | 52.65 | 45.02 | 65.21 | |||||||||
1999 | 47.69 | 50.41 | 58.78 | a | 59.31 | a | 72.67 | a | 82.32 | 87.84 | 89.44 | 81.21 | d | 72.07 | d | 57.43 | b | 46.66 | b | 67.15 | ||||||
2000 | 49.13 | 53.22 | 57.61 | 70.28 | a | 78.62 | f | 87.58 | 87.22 | b | 85.42 | 81.40 | 65.10 | 48.90 | 47.55 | 66.67 | a | |||||||||
2001 | 46.26 | 48.79 | 57.53 | 63.19 | c | 79.48 | 83.36 | b | 88.08 | g | 89.77 | 84.07 | 70.85 | 57.78 | 42.97 | 65.82 | a | |||||||||
2002 | 43.74 | 51.77 | 54.90 | 69.59 | c | 74.85 | 86.63 | 93.48 | 87.56 | 82.48 | 70.19 | 58.43 | a | 47.84 | 68.46 | |||||||||||
2003 | 56.02 | 51.54 | 59.61 | 60.98 | 76.06 | 88.48 | 95.31 | 93.77 | 85.78 | 75.02 | 52.35 | 46.73 | 70.14 | |||||||||||||
2004 | 47.50 | a | 47.05 | 67.06 | 65.67 | 76.48 | 87.05 | 91.92 | 88.98 | 81.45 | 67.18 | 52.33 | 47.34 | 68.33 | ||||||||||||
2005 | 49.74 | d | 51.90 | b | 54.87 | d | 62.65 | c | 73.36 | f | 81.04 | f | 92.38 | c | 88.98 | c | 80.98 | f | 70.77 | 58.07 | a | 45.70 | c | 63.90 | c | |
2006 | 48.02 | a | 52.00 | e | 53.73 | e | 66.02 | b | 80.02 | a | 88.12 | 93.98 | a | 90.30 | a | 79.98 | a | 66.85 | a | 56.52 | 45.40 | a | 68.41 | |||
2007 | 43.57 | c | 51.04 | 62.23 | 66.86 | b | 78.13 | 85.32 | 93.16 | 90.87 | a | 81.68 | 67.18 | a | 61.78 | g | 42.36 | b | 69.31 | a | ||||||
2008 | 43.35 | d | 46.71 | h | 57.18 | a | 64.50 | c | 72.02 | 83.52 | 92.15 | 90.42 | 82.12 | 68.79 | 58.83 | 44.23 | 68.83 | a | ||||||||
2009 | 48.42 | 50.80 | a | 57.37 | 63.68 | 80.84 | 81.20 | 92.48 | d | 90.03 | 85.26 | a | 66.38 | a | 58.52 | 43.95 | a | 68.24 | ||||||||
2010 | 48.34 | 51.46 | a | 56.43 | a | 62.62 | 69.62 | c | 85.50 | 95.02 | 90.40 | 84.40 | a | 70.98 | a | 53.78 | 49.34 | 68.16 | ||||||||
2011 | 45.73 | 47.61 | 57.03 | 63.85 | 69.73 | 81.70 | 90.27 | 92.10 | a | 84.60 | a | 68.89 | 53.45 | 45.53 | 66.71 | |||||||||||
2012 | 48.94 | 51.90 | 58.94 | 68.58 | 79.65 | a | 88.33 | 92.50 | 92.56 | 84.30 | 71.39 | 60.42 | 47.27 | 70.40 | ||||||||||||
2013 | 44.07 | c | 48.56 | d | 61.47 | 68.30 | g | 77.45 | a | 88.29 | a | 94.64 | m | 90.76 | 77.81 | a | 66.39 | 56.92 | 43.92 | 65.56 | b | |||||
2014 | 49.72 | a | 53.77 | 61.39 | c | 67.13 | 75.40 | a | 86.12 | b | 91.79 | 84.95 | a | 82.42 | j | 73.24 | 56.44 | c | 48.89 | 68.08 | a | |||||
2015 | 51.40 | 59.13 | a | 64.06 | 67.23 | 73.69 | d | 90.08 | 91.00 | 93.13 | 87.58 | 75.39 | 53.60 | 44.44 | 70.89 | |||||||||||
2016 | 46.63 | 56.41 | 61.23 | 65.65 | 72.32 | 89.38 | 93.13 | 88.29 | 80.47 | 74.19 | 60.45 | 47.02 | 69.60 | |||||||||||||
2017 | 46.74 | 53.29 | 53.69 | w | ----- | z | ----- | z | ----- | z | 92.91 | n | 90.89 | c | ----- | z | ----- | z | ----- | z | ----- | z | 63.64 | i | ||
2018 | ----- | z | 54.14 | g | 56.84 | 70.21 | a | 76.12 | a | 89.20 | 94.65 | 92.45 | 87.76 | k | 67.39 | h | 55.74 | a | 48.19 | 72.92 | d | |||||
2019 | 47.02 | b | 45.39 | 58.18 | 67.15 | 67.60 | 84.24 | a | 91.79 | 92.21 | 83.17 | 65.45 | 57.72 | 47.53 | 67.29 | |||||||||||
2020 | 47.90 | 50.95 | 58.05 | 60.97 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.30 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 46.09 | 50.49 | 56.84 | 63.83 | 73.33 | 83.28 | 89.58 | 88.02 | 80.16 | 67.70 | 54.22 | 45.51 | 66.52 | |||||||||||||
S.D. | 3.19 | 3.11 | 3.72 | 3.56 | 3.76 | 3.57 | 2.94 | 2.93 | 2.90 | 3.41 | 2.96 | 2.85 | 1.73 | |||||||||||||
SKEW | 0.33 | 0.18 | 0.21 | -0.18 | -0.03 | -0.14 | -0.14 | 0.05 | 0.00 | 0.25 | -0.01 | -0.49 | 0.88 | |||||||||||||
MAX | 56.02 | 59.13 | 67.06 | 70.28 | 80.89 | 90.08 | 95.31 | 93.77 | 87.58 | 75.39 | 60.45 | 52.77 | 70.89 | |||||||||||||
MIN | 39.50 | 42.48 | 49.76 | 56.32 | 64.66 | 74.46 | 81.37 | 82.08 | 73.30 | 60.21 | 47.57 | 36.92 | 63.90 | |||||||||||||
YRS | 54 | 53 | 55 | 54 | 53 | 53 | 53 | 59 | 57 | 54 | 57 | 58 | 41 |