YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 51.94 | 58.24 | 64.67 | d | 86.03 | 87.84 | 96.37 | 92.81 | 95.26 | 87.47 | 75.74 | 64.73 | 62.32 | 76.95 | ||||||||||||
1949 | 44.71 | 61.54 | 70.32 | 72.13 | 84.65 | 92.07 | 95.84 | 92.97 | 86.03 | 75.55 | 74.60 | 59.87 | 75.86 | |||||||||||||
1950 | 61.84 | 65.89 | 71.10 | 77.67 | 84.81 | 90.60 | 91.19 | 93.23 | 84.87 | 84.29 | 70.43 | 61.10 | 78.08 | |||||||||||||
1951 | 57.58 | 64.32 | 68.71 | 77.20 | 87.16 | 95.00 | 97.42 | 96.77 | 90.43 | 80.03 | 63.23 | 62.06 | 78.33 | |||||||||||||
1952 | 64.58 | 64.31 | 67.13 | 76.27 | 86.45 | 96.03 | 94.45 | 100.52 | 86.47 | 78.97 | 61.70 | 57.55 | 77.87 | |||||||||||||
1953 | 66.68 | 60.64 | 73.42 | 77.93 | 86.48 | 99.17 | a | 96.74 | 93.65 | 92.50 | 77.00 | 64.26 | g | 54.90 | 79.92 | a | ||||||||||
1954 | 59.90 | 69.14 | 69.35 | 81.07 | 79.97 | a | 92.37 | 97.61 | 96.10 | 92.37 | 79.57 | a | 68.37 | 62.93 | a | 79.06 | ||||||||||
1955 | 54.73 | a | 59.71 | 72.19 | 83.07 | 86.97 | 93.63 | 93.23 | 92.52 | 88.90 | 81.23 | 68.53 | 61.90 | 78.05 | ||||||||||||
1956 | 58.58 | 59.07 | a | 73.43 | a | 76.73 | d | 89.58 | 97.41 | a | 96.45 | 95.87 | 92.20 | 81.77 | 63.83 | 61.29 | 78.85 | |||||||||
1957 | 57.63 | a | 62.96 | 67.81 | 74.23 | 79.74 | 89.03 | 96.39 | 95.10 | b | 85.93 | b | 72.77 | 56.52 | a | 63.61 | 75.14 | |||||||||
1958 | 53.90 | 53.93 | a | 57.87 | a | 75.85 | c | 85.42 | ----- | z | 97.29 | 95.61 | 86.63 | 72.00 | 66.60 | 57.87 | 73.00 | a | ||||||||
1959 | 58.40 | a | 57.57 | 71.46 | c | 75.68 | b | 87.24 | n | 94.05 | i | 90.71 | 94.82 | i | 91.77 | 76.65 | 60.97 | 60.48 | 71.52 | c | ||||||
1960 | 55.97 | b | 57.54 | c | 62.29 | 81.59 | c | 87.19 | 97.23 | h | 93.15 | e | 94.81 | 90.63 | 80.84 | 68.60 | 51.00 | 74.87 | a | |||||||
1961 | 52.68 | 60.57 | 67.89 | l | 80.17 | 88.55 | 89.07 | 89.28 | b | 91.71 | 86.27 | 80.45 | 59.80 | 56.29 | 75.89 | a | ||||||||||
1962 | 52.27 | a | 70.68 | c | 65.07 | d | 78.07 | 92.24 | b | 94.75 | j | 95.29 | 97.19 | 85.63 | 79.81 | 69.07 | 57.61 | 76.63 | a | |||||||
1963 | 55.71 | 62.42 | b | 74.55 | b | 83.70 | 86.45 | b | 92.65 | g | 97.00 | a | 95.74 | 92.80 | y | ----- | z | ----- | z | ----- | z | 79.37 | e | |||
1964 | ----- | z | ----- | z | ----- | z | ----- | z | 87.96 | e | 93.47 | 97.23 | a | 96.00 | 85.17 | 79.39 | 69.30 | 62.26 | 83.85 | d | ||||||
1965 | 64.94 | 61.04 | 64.48 | 82.41 | h | 83.77 | 89.90 | 95.23 | 91.84 | 88.77 | 79.61 | 74.23 | 63.23 | 77.91 | a | |||||||||||
1966 | 52.52 | 59.32 | 73.81 | 77.83 | 84.13 | 90.70 | 96.16 | 88.93 | a | 84.57 | 77.74 | 74.57 | 60.10 | 76.70 | ||||||||||||
1967 | 64.68 | 65.43 | 80.39 | 84.60 | 88.58 | 93.23 | 94.39 | 91.94 | 82.60 | 81.65 | 68.00 | 57.97 | 79.45 | |||||||||||||
1968 | 56.42 | 59.76 | 67.60 | a | 76.10 | a | 86.19 | 92.27 | 91.90 | 93.52 | 88.00 | 84.39 | 64.83 | 62.87 | 76.99 | |||||||||||
1969 | 66.13 | a | 64.00 | 62.81 | 80.23 | 84.55 | 94.03 | 99.68 | 96.16 | 85.97 | 74.45 | 67.10 | 63.74 | 78.24 | ||||||||||||
1970 | 59.68 | 63.96 | 66.97 | 80.63 | 86.52 | 91.97 | 97.32 | 96.52 | 86.66 | a | 74.96 | c | 68.73 | 67.65 | 78.46 | |||||||||||
1971 | 60.32 | 59.96 | 70.74 | 77.23 | 84.71 | 90.97 | 94.42 | 85.00 | 82.77 | 75.52 | 66.70 | 58.77 | 75.59 | |||||||||||||
1972 | 59.97 | 63.59 | 73.39 | 83.83 | 83.45 | 91.63 | 90.84 | 88.00 | 85.43 | 75.48 | 57.10 | 57.19 | 75.83 | |||||||||||||
1973 | 47.94 | 54.68 | 68.65 | 70.80 | 84.16 | 90.67 | 91.42 | 92.84 | 83.23 | 79.10 | 71.70 | 62.65 | 74.82 | |||||||||||||
1974 | 56.77 | 64.96 | 77.45 | 80.37 | 88.48 | 93.33 | 95.13 | 89.00 | 75.70 | ----- | z | 62.93 | 54.87 | 76.27 | a | |||||||||||
1975 | 57.00 | 58.00 | 67.90 | 77.10 | 83.00 | 91.87 | 87.81 | 90.58 | 80.31 | a | 77.94 | 69.30 | 59.55 | 75.03 | ||||||||||||
1976 | 57.58 | 69.31 | 71.45 | 77.53 | 81.03 | 91.77 | 85.60 | a | 92.61 | 83.23 | 70.67 | a | 57.40 | 57.93 | c | 74.68 | ||||||||||
1977 | 49.34 | b | 63.63 | a | 69.84 | 74.27 | 85.55 | 92.60 | 93.87 | 95.84 | 95.37 | 79.00 | 70.11 | b | 64.27 | a | 77.81 | |||||||||
1978 | 49.80 | a | 51.75 | 76.62 | r | 86.27 | 87.97 | 92.90 | a | 97.06 | 92.74 | 83.77 | 78.91 | i | 61.21 | p | 56.17 | a | 77.60 | c | ||||||
1979 | 45.13 | 58.64 | 68.35 | 78.72 | e | 83.42 | 90.23 | 94.23 | 90.81 | 89.17 | 84.19 | 64.25 | b | 57.71 | 75.40 | |||||||||||
1980 | 54.83 | b | 59.79 | 68.81 | 77.73 | 83.48 | 95.31 | a | 100.13 | 94.87 | 86.17 | 77.13 | 62.90 | 61.39 | c | 76.88 | ||||||||||
1981 | 55.93 | a | 61.89 | 63.80 | a | 77.80 | 83.53 | a | 90.83 | 95.32 | 92.39 | 89.08 | f | 76.26 | 72.03 | a | 65.97 | b | 75.98 | a | ||||||
1982 | 57.63 | a | 59.29 | 72.00 | a | 76.63 | 83.61 | 88.00 | a | ----- | z | 96.00 | 90.07 | 77.42 | 64.13 | 54.77 | 74.51 | a | ||||||||
1983 | 52.16 | 60.04 | 68.10 | 73.53 | 86.81 | 88.73 | 95.35 | ----- | z | 89.87 | 78.81 | 67.75 | b | 46.79 | b | 73.45 | a | |||||||||
1984 | ----- | z | ----- | z | 68.32 | 78.27 | 88.35 | 92.43 | 94.10 | 94.96 | g | 87.00 | 72.93 | a | 63.83 | 59.55 | 78.31 | c | ||||||||
1985 | 52.33 | a | 55.14 | 69.48 | b | 79.97 | 88.03 | 88.30 | 93.23 | 96.71 | 86.00 | 73.32 | 68.47 | 56.29 | 75.61 | |||||||||||
1986 | ----- | z | 70.89 | j | 74.52 | 83.13 | 87.56 | d | 88.54 | b | 95.17 | a | 91.97 | a | 85.80 | 72.39 | c | 66.17 | 52.50 | a | 79.77 | b | ||||
1987 | 54.94 | 58.86 | 62.66 | b | 75.40 | 82.42 | 87.50 | 92.26 | 95.13 | a | 85.27 | 80.81 | 66.67 | 57.45 | 74.95 | |||||||||||
1988 | 51.84 | 59.79 | 72.53 | a | 79.63 | 83.45 | 91.00 | 91.87 | 93.23 | 87.13 | 79.03 | 71.83 | 58.29 | 76.64 | ||||||||||||
1989 | 61.42 | 54.89 | 71.77 | 82.36 | b | 89.94 | 89.27 | 95.26 | 94.62 | j | 84.86 | a | 81.19 | 69.87 | 50.77 | 75.60 | a | |||||||||
1990 | 62.07 | a | 66.22 | a | 66.87 | 77.30 | 84.55 | 98.36 | b | 88.20 | a | 90.39 | 85.13 | 77.07 | a | 68.66 | a | 55.68 | 76.71 | |||||||
1991 | 50.74 | 64.18 | 72.29 | 80.90 | 89.16 | 91.13 | 91.35 | 89.60 | a | 81.86 | b | 80.52 | 60.33 | 55.37 | a | 75.62 | ||||||||||
1992 | 53.26 | 64.52 | 72.68 | 78.37 | 79.45 | 88.83 | 93.58 | 89.90 | b | 88.60 | 81.58 | ----- | z | 57.87 | 77.15 | a | ||||||||||
1993 | 54.03 | 59.46 | 67.47 | a | 78.90 | a | 84.84 | 91.77 | 96.45 | 95.84 | 85.03 | 76.77 | 61.57 | 59.97 | 76.01 | |||||||||||
1994 | 57.03 | 59.50 | 70.39 | 79.45 | a | 81.55 | 97.00 | 97.81 | 94.48 | 86.53 | 78.13 | h | 68.57 | 59.90 | 77.47 | a | ||||||||||
1995 | 59.07 | a | 64.43 | 66.58 | 78.80 | 83.58 | 90.48 | a | 97.57 | a | 93.45 | 85.62 | a | 81.74 | 70.38 | a | 59.63 | a | 77.61 | |||||||
1996 | 59.45 | 65.59 | 65.65 | ----- | z | 94.58 | 95.85 | c | 96.42 | 90.29 | ----- | z | 78.45 | 66.33 | 62.93 | a | 77.55 | b | ||||||||
1997 | 54.84 | 55.18 | 71.63 | a | 68.80 | 82.16 | 88.43 | 95.45 | 95.43 | a | 90.77 | 78.81 | 63.93 | 54.55 | 75.00 | |||||||||||
1998 | 63.23 | 61.11 | 67.52 | 78.23 | 94.00 | 99.37 | 100.29 | 92.29 | 92.63 | 80.94 | 69.70 | 57.94 | 79.77 | |||||||||||||
1999 | 62.03 | 70.79 | 67.06 | 79.70 | 86.84 | 92.13 | 97.00 | a | 98.03 | b | 90.17 | a | 80.32 | 73.24 | a | 60.03 | 79.78 | |||||||||
2000 | 62.39 | 69.76 | 73.52 | 80.72 | a | 92.90 | 88.27 | 98.37 | a | 97.24 | b | 93.13 | 75.55 | 58.55 | a | 52.32 | c | 78.56 | ||||||||
2001 | 51.74 | 60.86 | 62.29 | 80.83 | 90.19 | 96.33 | 99.50 | a | 94.65 | 87.43 | 80.39 | 66.87 | 59.00 | a | 77.51 | |||||||||||
2002 | 59.52 | 58.21 | 67.16 | 79.55 | a | 87.30 | a | 93.34 | a | 93.32 | 97.03 | a | 88.43 | 73.29 | 61.20 | 57.32 | 76.31 | |||||||||
2003 | 58.77 | 59.14 | 72.10 | 82.70 | 89.55 | 90.40 | 95.53 | a | 96.35 | 85.30 | 79.45 | 66.43 | 62.26 | 78.17 | ||||||||||||
2004 | 59.06 | 57.76 | 70.55 | 75.50 | 89.27 | a | 93.63 | 92.71 | 90.29 | 86.40 | 77.94 | 62.97 | 56.94 | 76.08 | ||||||||||||
2005 | 61.90 | 57.89 | a | 67.45 | 79.07 | 81.74 | 93.80 | 95.06 | 90.19 | 91.00 | 77.16 | 71.60 | 58.65 | 77.13 | ||||||||||||
2006 | 66.77 | 62.46 | 70.55 | 83.93 | 91.35 | 94.90 | 96.45 | 93.32 | 82.87 | 77.79 | c | 70.67 | 57.80 | a | 79.07 | |||||||||||
2007 | 47.65 | 60.57 | 72.03 | a | 73.97 | 79.52 | d | 88.47 | 89.10 | a | 90.65 | 88.23 | 84.13 | 67.66 | a | 59.94 | 75.16 | |||||||||
2008 | 57.45 | 67.45 | 70.61 | 80.80 | 89.19 | 97.77 | 93.63 | a | 90.74 | 82.93 | 78.06 | 69.27 | 59.81 | 78.14 | ||||||||||||
2009 | 60.52 | 68.77 | b | 72.55 | 78.55 | a | 85.90 | a | 94.62 | a | 94.52 | 96.81 | 84.87 | 75.68 | 71.52 | a | 54.39 | c | 78.22 | |||||||
2010 | 57.34 | b | 52.36 | 69.38 | b | 77.50 | 88.00 | 97.89 | c | 89.48 | 96.58 | 88.00 | 80.29 | 71.62 | a | 62.65 | 77.59 | |||||||||
2011 | 57.55 | 63.04 | 76.58 | 88.00 | 90.13 | 102.03 | 100.74 | 101.48 | 91.30 | 81.33 | a | 68.07 | 51.13 | 80.95 | ||||||||||||
2012 | 60.90 | 61.55 | 75.19 | 86.50 | 89.03 | a | 96.80 | 94.26 | 96.13 | a | 86.43 | 74.87 | 71.70 | 61.42 | 79.57 | |||||||||||
2013 | 57.24 | b | 65.32 | f | 75.30 | h | 83.53 | k | 84.82 | n | ----- | z | 94.17 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.24 | k |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 96.62 | g | 92.57 | 79.74 | 65.90 | 60.38 | e | 74.65 | h | |||
2016 | 58.83 | b | 67.29 | a | 74.26 | 78.30 | 84.61 | 91.14 | a | 100.00 | 93.64 | f | 92.67 | 88.00 | 70.73 | 57.83 | a | 78.51 | a | |||||||
2017 | 60.00 | b | 70.30 | a | 77.21 | c | 83.03 | a | 84.88 | e | 94.83 | a | 97.27 | a | 91.65 | 88.07 | 81.23 | e | 73.32 | b | 55.58 | 79.78 | ||||
2018 | 56.90 | a | 64.82 | 74.87 | 79.34 | a | 94.55 | 99.13 | 97.77 | 95.48 | 84.27 | 70.90 | 62.26 | c | 55.80 | a | 78.01 | |||||||||
2019 | 59.35 | 63.86 | 68.79 | b | 79.77 | 82.90 | a | 93.07 | 96.77 | 100.94 | 92.28 | a | 76.87 | 65.20 | 63.45 | 78.60 | ||||||||||
2020 | 60.16 | 57.59 | 70.06 | ----- | z | ----- | z | ----- | z | 99.10 | 99.29 | 84.23 | 80.06 | 71.17 | 59.16 | 75.65 | c | |||||||||
2021 | 53.42 | 51.54 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 84.23 | 70.77 | ----- | z | 64.99 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.10 | 61.51 | 69.83 | 79.03 | 86.26 | 92.84 | 94.89 | 93.97 | 87.17 | 78.43 | 67.02 | 58.73 | 77.30 | |||||||||||||
S.D. | 4.89 | 4.58 | 4.09 | 3.66 | 3.52 | 3.34 | 3.18 | 3.19 | 3.53 | 3.47 | 4.39 | 3.81 | 1.61 | |||||||||||||
SKEW | -0.31 | 0.05 | -0.20 | -0.01 | 0.26 | 0.54 | -0.55 | -0.09 | -0.14 | -0.05 | -0.47 | -0.48 | 0.09 | |||||||||||||
MAX | 66.77 | 70.79 | 80.39 | 88.00 | 94.58 | 102.03 | 100.74 | 101.48 | 95.37 | 88.00 | 74.60 | 67.65 | 80.95 | |||||||||||||
MIN | 44.71 | 51.54 | 57.87 | 68.80 | 79.45 | 87.50 | 85.60 | 85.00 | 75.70 | 70.67 | 56.52 | 46.79 | 74.68 | |||||||||||||
YRS | 69 | 68 | 67 | 66 | 68 | 64 | 69 | 65 | 68 | 68 | 68 | 70 | 48 |