YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1955 | ----- | z | ----- | z | 53.61 | 54.58 | 66.47 | 69.32 | 71.21 | 72.44 | 71.47 | 63.08 | 52.60 | a | 49.55 | 62.43 | b | |||||||||
1956 | 47.77 | a | 46.88 | 53.47 | 57.80 | 64.08 | 71.20 | 72.95 | 70.06 | 69.28 | 61.29 | 52.77 | 45.27 | 59.40 | ||||||||||||
1957 | 43.10 | 51.30 | 54.47 | 59.78 | 62.65 | 73.97 | a | 73.73 | 70.37 | 70.58 | 61.16 | 51.98 | 45.11 | 59.85 | ||||||||||||
1958 | 44.94 | 53.18 | 50.34 | 58.42 | 64.63 | 69.57 | 71.37 | 74.47 | 72.23 | 65.23 | 54.33 | 48.98 | 60.64 | |||||||||||||
1959 | 47.52 | 48.04 | 56.60 | 61.87 | 63.58 | 71.17 | 74.97 | 71.47 | 68.07 | 65.47 | a | 52.65 | 47.23 | a | 60.72 | |||||||||||
1960 | 45.80 | a | 50.90 | 56.10 | 58.85 | 63.87 | 74.55 | 75.37 | 72.44 | 69.85 | 61.98 | 53.52 | 44.78 | a | 60.67 | |||||||||||
1961 | 41.19 | 52.25 | 53.44 | 58.90 | 61.13 | 74.40 | 77.50 | 73.81 | 69.12 | 64.11 | 51.78 | 45.15 | 60.23 | |||||||||||||
1962 | 41.10 | b | 47.27 | 51.16 | 61.35 | 62.27 | 70.02 | 72.11 | 72.48 | 68.45 | 61.37 | 55.58 | 45.58 | 59.06 | ||||||||||||
1963 | 40.42 | 56.14 | 52.23 | 53.67 | 62.42 | a | 69.28 | 71.47 | 72.15 | a | 71.60 | 62.56 | 51.20 | 39.97 | a | 58.59 | ||||||||||
1964 | 44.57 | a | 50.05 | 53.37 | 57.58 | 59.89 | 67.90 | 73.29 | 72.66 | 67.67 | 65.89 | 50.35 | 50.07 | a | 59.44 | |||||||||||
1965 | 44.37 | 49.34 | 53.34 | 58.03 | 64.15 | 65.47 | 71.42 | 74.39 | 65.18 | 64.92 | 54.42 | 41.24 | 58.86 | |||||||||||||
1966 | 44.42 | 47.36 | 53.48 | 62.83 | 64.79 | 71.73 | 70.39 | 73.73 | 70.30 | 62.32 | 54.55 | 46.05 | a | 60.16 | ||||||||||||
1967 | 45.26 | 47.27 | 51.66 | 49.45 | 63.47 | 66.75 | 74.48 | 75.42 | 72.30 | 64.13 | 56.35 | 43.92 | 59.20 | |||||||||||||
1968 | 41.89 | 52.93 | 55.08 | 61.15 | 63.61 | 72.65 | 73.55 | 70.27 | 70.02 | 60.68 | 52.23 | 43.76 | 59.82 | |||||||||||||
1969 | 43.90 | 46.80 | 53.24 | 57.42 | 65.82 | 67.62 | 73.03 | 74.19 | 71.23 | 60.40 | 53.25 | 48.60 | 59.63 | |||||||||||||
1970 | 49.15 | 51.73 | 56.69 | 56.43 | 66.89 | 70.82 | 73.68 | 69.63 | 69.30 | 59.27 | 53.88 | 44.08 | a | 60.13 | ||||||||||||
1971 | 43.87 | 47.27 | 51.71 | 55.17 | 60.21 | 67.28 | 73.06 | 73.52 | a | 69.58 | 57.92 | 50.72 | 41.87 | 57.68 | ||||||||||||
1972 | 38.97 | 48.78 | 56.73 | 57.15 | 62.98 | 68.12 | 71.34 | 72.10 | 64.75 | 58.47 | 48.93 | c | 46.58 | s | 58.94 | a | ||||||||||
1973 | ----- | z | 49.27 | 51.21 | 60.75 | 66.03 | 72.25 | 74.11 | 70.85 | a | 68.82 | b | 62.11 | 53.33 | 47.25 | a | 61.45 | a | ||||||||
1974 | 46.11 | 47.56 | a | 52.93 | a | 56.89 | b | 63.90 | a | 70.73 | 73.68 | 73.52 | 70.68 | 65.59 | c | 52.36 | a | 44.55 | a | 59.88 | ||||||
1975 | 42.90 | 49.48 | b | 50.67 | b | 52.43 | a | 64.16 | 68.07 | 70.77 | 71.69 | 71.17 | 61.35 | 51.98 | c | 45.25 | g | 59.52 | a | |||||||
1976 | 45.79 | 50.46 | a | 53.76 | 56.81 | a | 67.70 | a | 71.88 | 74.90 | 70.50 | 70.78 | 64.81 | 55.25 | 45.37 | 60.67 | ||||||||||
1977 | 42.29 | 52.02 | 52.39 | 62.23 | 59.59 | b | 72.92 | 74.45 | a | 73.73 | a | 68.77 | 64.70 | a | 55.53 | 50.10 | a | 60.73 | ||||||||
1978 | 49.31 | e | 50.10 | b | 57.33 | b | 57.32 | 67.47 | 69.21 | a | 72.75 | a | 74.65 | e | 69.92 | 66.15 | 51.12 | a | 41.65 | 60.58 | ||||||
1979 | 44.60 | a | 48.50 | 54.26 | 57.71 | b | 66.75 | a | 71.40 | 74.19 | 72.21 | 73.57 | 65.03 | 51.78 | 46.38 | e | 60.53 | |||||||||
1980 | 47.62 | b | 51.26 | d | 53.80 | a | 58.62 | 62.58 | a | 67.30 | 73.32 | 70.35 | 68.65 | 64.32 | 54.75 | 45.87 | a | 59.87 | ||||||||
1981 | 46.79 | 52.05 | 52.74 | b | 60.15 | 67.40 | a | 77.87 | 73.97 | 72.87 | 70.68 | 60.71 | 56.05 | a | 49.25 | c | 61.71 | |||||||||
1982 | 41.41 | i | 51.02 | 51.47 | 56.33 | a | 66.12 | a | 66.28 | a | 70.90 | 72.55 | 69.92 | 63.00 | 48.39 | b | 46.55 | 60.23 | a | |||||||
1983 | 42.59 | d | 50.44 | b | 54.28 | b | 55.42 | 63.90 | 70.54 | b | 72.36 | b | 73.87 | a | 72.97 | 64.73 | a | 53.59 | a | 49.92 | a | 60.38 | ||||
1984 | 45.73 | 49.84 | 58.19 | 59.00 | d | 71.59 | d | 71.68 | 78.47 | 75.50 | b | 76.10 | 61.76 | b | 51.82 | 44.02 | b | 61.98 | ||||||||
1985 | 40.29 | 51.04 | 51.02 | a | 62.47 | 62.04 | q | ----- | z | 71.92 | y | 72.23 | 68.87 | 63.69 | 52.15 | 41.87 | a | 55.96 | c | |||||||
1986 | 50.91 | c | 54.11 | a | 57.90 | 59.22 | a | 66.16 | c | 71.18 | 73.81 | 72.82 | a | 67.10 | 65.35 | a | 58.05 | 45.77 | 61.87 | |||||||
1987 | 45.26 | 52.05 | 54.77 | 64.15 | 69.06 | 72.40 | 71.24 | 73.33 | b | 71.60 | a | 68.62 | e | 54.53 | 46.90 | a | 61.99 | |||||||||
1988 | 46.40 | 53.41 | 57.65 | 60.77 | 64.68 | 72.29 | b | 79.89 | 74.53 | a | 72.27 | 64.93 | j | 55.35 | c | 45.89 | d | 62.10 | a | |||||||
1989 | 44.02 | a | 46.91 | 56.34 | b | 62.77 | d | 66.73 | 72.55 | a | 76.63 | 72.82 | a | 69.13 | 64.27 | a | 55.40 | a | 44.00 | 60.96 | ||||||
1990 | 47.30 | a | 47.77 | 55.65 | 63.73 | 66.44 | 72.17 | 77.28 | a | 76.19 | 72.74 | a | 68.22 | b | 54.90 | 42.53 | a | 62.08 | ||||||||
1991 | 46.88 | a | 54.63 | a | 51.58 | 57.93 | a | 63.27 | ----- | z | 74.87 | 72.50 | 73.35 | 69.42 | 56.17 | 45.66 | 60.57 | a | ||||||||
1992 | 42.31 | 53.38 | a | 56.73 | 63.10 | 71.26 | 71.33 | 75.10 | 77.45 | 72.57 | 67.90 | 56.41 | b | 44.70 | a | 62.69 | ||||||||||
1993 | 46.16 | 50.61 | 58.15 | 60.12 | a | 65.95 | 74.98 | a | 77.78 | a | 76.68 | t | 72.30 | 66.55 | 53.90 | 45.10 | 61.05 | a | ||||||||
1994 | 46.35 | 47.89 | a | 56.93 | a | 61.41 | a | 65.08 | a | 72.26 | a | 74.53 | 75.15 | 71.60 | 63.67 | a | 49.45 | 44.45 | l | 62.21 | a | |||||
1995 | 52.00 | x | 52.73 | 53.84 | 58.38 | a | 62.27 | 69.65 | 74.68 | 75.35 | 71.63 | 66.60 | a | 59.78 | 51.55 | a | 63.32 | a | ||||||||
1996 | 48.93 | a | 52.79 | a | 56.21 | 61.38 | 66.80 | a | 72.90 | 77.76 | 76.70 | a | 70.27 | 64.23 | a | 55.48 | 49.72 | b | 62.76 | |||||||
1997 | 47.50 | c | 52.57 | 57.98 | 62.48 | a | 71.92 | 72.74 | a | 75.85 | a | 74.47 | 74.33 | 64.17 | a | 56.48 | b | 45.71 | 63.02 | |||||||
1998 | 48.22 | a | 49.96 | 55.53 | 56.78 | 59.06 | 66.95 | k | 76.38 | f | 77.17 | a | 72.63 | c | 62.81 | 53.43 | a | 44.18 | a | 57.98 | b | |||||
1999 | 45.59 | c | 49.95 | 52.22 | a | 59.72 | a | 64.06 | 70.21 | a | 72.32 | a | 73.50 | a | 72.16 | a | 67.05 | ----- | z | 48.63 | 61.40 | a | ||||
2000 | 50.82 | a | 52.32 | a | ----- | z | 61.37 | 68.15 | d | 73.31 | a | ----- | z | 74.23 | a | 72.03 | 62.06 | 49.95 | ----- | z | 62.69 | c | ||||
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.27 | h | 66.40 | f | ----- | z | 47.92 | a | 47.92 | k |
2002 | 46.68 | c | ----- | z | 58.12 | r | 64.62 | r | 65.28 | b | 73.14 | b | 75.48 | 72.90 | 72.36 | a | 64.07 | a | 55.03 | a | 48.89 | 63.76 | c | |||
2003 | 49.92 | a | 50.32 | 56.52 | 55.29 | b | ----- | z | ----- | z | 77.55 | 73.66 | 73.38 | a | 67.94 | 51.75 | b | 48.46 | c | 60.48 | b | |||||
2004 | 45.50 | 51.56 | e | ----- | z | ----- | z | 66.55 | 72.43 | 74.35 | 74.87 | 72.27 | 62.69 | 51.77 | 46.37 | 61.84 | b | |||||||||
2005 | 44.58 | 52.41 | a | 56.95 | 57.82 | 65.90 | 68.55 | 77.95 | 76.91 | o | 68.40 | a | 64.11 | 56.38 | a | 50.05 | b | 60.28 | a | |||||||
2006 | 49.36 | b | 51.43 | 50.71 | 57.81 | a | 68.08 | 74.30 | 79.16 | 72.48 | 70.71 | a | 62.62 | a | 55.08 | 47.52 | 61.60 | |||||||||
2007 | 45.52 | 51.18 | 59.69 | 61.55 | 67.11 | 73.20 | c | 75.61 | 74.35 | d | 69.14 | b | 62.17 | g | 56.38 | a | 46.98 | 61.88 | a | |||||||
2008 | 45.61 | 50.82 | a | 56.15 | a | 59.77 | b | 67.58 | 73.65 | 76.29 | 76.22 | a | 72.70 | 65.47 | a | 57.57 | a | 44.40 | a | 62.19 | ||||||
2009 | ----- | z | 50.93 | e | 52.36 | j | 59.60 | d | 69.33 | a | 69.46 | e | 76.46 | d | 74.91 | d | 74.98 | g | 61.89 | v | ----- | z | 44.75 | a | 63.63 | e |
2010 | 46.56 | e | 51.75 | t | ----- | z | 56.48 | 62.11 | 73.22 | g | 74.10 | 71.60 | 72.63 | 64.81 | b | 53.95 | 51.95 | 61.58 | c | |||||||
2011 | 46.28 | d | 51.91 | a | 56.89 | d | 62.94 | f | 65.17 | s | 71.20 | e | 74.95 | c | 74.79 | 75.90 | 68.15 | h | 56.33 | f | 49.70 | c | 62.70 | d | ||
2012 | 52.57 | a | 54.64 | h | 55.37 | 61.68 | ----- | z | 74.10 | d | 74.41 | c | ----- | z | 72.03 | ----- | z | 56.98 | a | 48.94 | 62.01 | d | ||||
2013 | 46.68 | 52.14 | 58.94 | 66.27 | 69.21 | 73.86 | a | 75.35 | 73.50 | 71.70 | 63.94 | 56.43 | 47.06 | 62.92 | ||||||||||||
2014 | 53.37 | 54.68 | 59.69 | 62.92 | 70.31 | 73.68 | 76.32 | 74.08 | 72.77 | 68.05 | 57.48 | 53.02 | 64.70 | |||||||||||||
2015 | 49.88 | a | 56.64 | 62.39 | 62.83 | 63.98 | 74.28 | 76.10 | 75.56 | 75.18 | b | 70.37 | 52.92 | 48.00 | 64.01 | |||||||||||
2016 | 51.21 | 56.64 | 58.53 | 63.75 | 67.52 | 74.33 | a | 75.21 | 73.15 | 72.00 | 64.44 | ----- | z | 47.69 | 64.04 | a | ||||||||||
2017 | 47.23 | 53.48 | 58.40 | 60.72 | 66.66 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.96 | h | ||||
2018 | ----- | z | ----- | z | ----- | z | ----- | z | 66.11 | 72.75 | x | ----- | z | 73.79 | ----- | z | 66.25 | w | 57.55 | a | 50.47 | b | 61.98 | h | ||
2019 | 51.39 | 49.05 | 55.18 | 64.32 | b | 63.48 | 74.48 | d | 75.18 | c | 76.89 | 72.85 | 65.48 | 57.42 | 50.94 | 63.05 | ||||||||||
2020 | 49.98 | 55.95 | 54.98 | a | 62.85 | 69.87 | 74.65 | 75.67 | b | 78.85 | 75.83 | 70.76 | 56.15 | 50.26 | 64.65 | |||||||||||
2021 | 51.34 | 55.29 | 55.90 | 62.38 | 69.63 | 74.20 | 76.94 | 76.18 | ----- | z | ----- | z | ----- | z | ----- | z | 65.23 | d | ||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 46.21 | 51.08 | 54.98 | 59.45 | 65.46 | 71.52 | 74.55 | 73.61 | 71.09 | 64.20 | 54.02 | 46.68 | 61.00 | |||||||||||||
S.D. | 3.18 | 2.56 | 2.68 | 3.18 | 2.95 | 2.57 | 2.21 | 1.95 | 2.31 | 2.75 | 2.46 | 2.86 | 1.65 | |||||||||||||
SKEW | 0.05 | 0.21 | 0.24 | -0.49 | 0.07 | -0.33 | 0.17 | 0.19 | -0.25 | 0.15 | -0.14 | -0.05 | 0.44 | |||||||||||||
MAX | 53.37 | 56.64 | 62.39 | 66.27 | 71.92 | 77.87 | 79.89 | 78.85 | 76.10 | 70.76 | 59.78 | 53.02 | 64.70 | |||||||||||||
MIN | 38.97 | 46.80 | 50.34 | 49.45 | 59.06 | 65.47 | 70.39 | 69.63 | 64.75 | 57.92 | 48.39 | 39.97 | 57.68 | |||||||||||||
YRS | 60 | 61 | 60 | 62 | 61 | 59 | 61 | 62 | 62 | 58 | 60 | 61 | 39 |