YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1942 | 47.63 | a | 48.48 | 52.87 | 57.63 | 62.44 | 73.42 | 81.71 | 79.19 | 71.82 | 65.39 | 53.63 | 45.06 | 61.61 | ||||||||||||
1943 | ----- | z | ----- | z | 54.00 | 61.23 | 68.68 | 69.55 | 79.66 | 76.23 | 75.53 | 63.66 | 54.80 | 48.23 | 65.16 | b | ||||||||||
1944 | 47.47 | 47.67 | 54.35 | 57.12 | 67.44 | 70.03 | 78.61 | 77.90 | 74.77 | 66.65 | 51.88 | 48.58 | 61.87 | |||||||||||||
1945 | 44.08 | 51.71 | 50.52 | 61.60 | 65.76 | 75.00 | 84.06 | 79.29 | 75.97 | 66.16 | 52.90 | 48.23 | 62.94 | |||||||||||||
1946 | 44.56 | 47.50 | 54.45 | 62.53 | 67.40 | 72.79 | f | 80.77 | 80.45 | 73.88 | 60.29 | 50.45 | 44.85 | 60.65 | a | |||||||||||
1947 | 40.37 | 50.45 | 57.50 | 63.12 | 72.29 | 75.32 | 77.79 | 76.60 | 76.02 | 64.35 | 49.98 | 45.10 | 62.41 | |||||||||||||
1948 | 50.21 | 48.48 | 51.71 | 58.20 | 63.60 | 73.97 | 78.95 | 77.68 | 73.13 | 64.34 | 52.38 | 43.63 | 61.36 | |||||||||||||
1949 | 38.24 | 46.39 | 53.11 | 63.67 | 66.66 | 77.00 | 81.16 | 76.44 | 75.33 | a | 63.24 | b | 58.05 | 44.92 | 62.02 | |||||||||||
1950 | 43.79 | 52.16 | 53.48 | 63.21 | a | 69.23 | 73.63 | 83.97 | 80.77 | a | 73.62 | a | 65.90 | 59.03 | 51.31 | 64.17 | ||||||||||
1951 | 46.85 | 50.04 | 54.76 | 61.67 | a | 69.11 | 75.78 | 80.95 | 79.66 | 76.13 | 63.53 | 55.33 | 45.87 | 63.31 | ||||||||||||
1952 | 45.50 | 50.38 | 49.97 | 60.02 | 70.15 | 69.23 | 82.44 | 80.08 | 75.52 | 67.90 | 51.65 | 47.76 | 62.55 | |||||||||||||
1953 | 50.73 | 49.16 | 53.39 | 59.43 | 61.92 | 70.40 | 83.56 | 76.26 | 75.40 | 62.50 | 54.30 | 46.50 | 61.96 | |||||||||||||
1954 | 46.37 | 50.70 | 51.73 | 64.08 | 70.52 | 72.77 | 82.77 | 75.48 | 71.25 | 63.76 | 52.35 | 44.94 | 62.23 | |||||||||||||
1955 | 41.58 | 47.04 | 52.87 | 54.52 | 66.23 | 72.63 | 77.18 | 81.56 | 74.68 | 65.02 | 52.05 | 50.23 | 61.30 | |||||||||||||
1956 | 49.23 | 45.64 | 53.34 | 58.73 | 66.55 | 74.87 | 80.52 | 76.45 | 74.87 | 61.55 | 53.48 | 45.31 | 61.71 | |||||||||||||
1957 | 42.92 | 53.38 | 54.89 | 60.76 | a | 65.32 | 77.30 | 80.57 | p | 77.77 | a | 73.60 | a | 62.91 | b | 52.59 | b | 46.23 | c | 60.70 | a | |||||
1958 | 46.57 | b | 54.20 | 51.05 | a | 59.27 | b | 69.68 | 72.90 | 80.61 | 84.25 | a | 74.61 | b | 68.76 | 54.55 | a | 50.65 | a | 63.92 | ||||||
1959 | 50.06 | 48.71 | 56.77 | 64.56 | c | 65.30 | a | 77.16 | a | 83.98 | a | 78.45 | 71.50 | e | 66.58 | a | 54.55 | b | 46.94 | 63.71 | ||||||
1960 | 45.98 | 49.71 | 57.28 | a | 59.53 | a | 66.15 | 80.83 | 83.73 | 79.69 | 75.52 | 62.21 | 51.38 | 45.17 | a | 63.10 | ||||||||||
1961 | 43.44 | 52.54 | 53.98 | a | 61.75 | 65.23 | 79.66 | a | 84.53 | 82.50 | a | 72.62 | a | 64.23 | a | 52.40 | 44.45 | 63.11 | ||||||||
1962 | 41.73 | 48.45 | 51.12 | a | 63.42 | 64.29 | 75.30 | 81.06 | 79.08 | 74.38 | 62.94 | 54.72 | 48.58 | 62.09 | ||||||||||||
1963 | 43.39 | 56.71 | 53.00 | 55.77 | 67.57 | a | 72.75 | d | 78.95 | 78.61 | 76.68 | 66.03 | 52.76 | a | 42.05 | 62.02 | ||||||||||
1964 | 45.95 | 48.79 | a | 52.97 | 59.40 | 64.85 | 74.37 | 81.71 | 80.21 | 72.37 | 68.50 | 51.40 | 50.42 | 62.58 | ||||||||||||
1965 | 48.23 | 50.91 | 55.50 | a | 60.92 | 68.19 | 72.28 | 80.85 | 81.82 | 70.47 | 67.53 | 55.62 | 42.26 | 62.88 | ||||||||||||
1966 | 45.21 | 47.64 | 55.53 | 64.70 | 70.31 | 75.68 | 78.34 | 82.48 | 82.75 | 65.74 | 54.98 | 45.55 | 64.08 | |||||||||||||
1967 | 46.13 | 48.16 | 52.94 | 50.09 | a | 68.02 | 73.18 | 84.87 | 85.05 | 77.67 | 68.40 | 59.03 | 44.21 | 63.15 | ||||||||||||
1968 | 45.27 | 55.66 | 56.53 | a | 60.81 | a | 67.32 | 77.60 | 82.61 | 76.71 | ----- | z | 63.94 | 52.12 | a | 44.90 | 62.13 | a | ||||||||
1969 | 46.52 | 48.77 | 53.02 | 58.78 | 71.18 | 73.07 | 82.35 | 81.32 | 76.93 | 61.37 | 54.60 | 48.18 | 63.01 | |||||||||||||
1970 | 51.85 | 53.43 | 55.74 | 56.32 | 69.94 | 75.57 | 83.47 | 80.34 | 73.97 | 64.23 | 56.95 | 47.68 | 64.12 | |||||||||||||
1971 | 45.85 | 49.71 | 54.79 | 59.85 | 64.42 | 74.82 | 82.56 | 82.52 | 75.25 | 62.16 | 51.67 | a | 43.45 | a | 62.25 | |||||||||||
1972 | 41.10 | 52.33 | 60.82 | 61.29 | a | 71.42 | 77.97 | 82.29 | 80.13 | ----- | z | ----- | z | 49.77 | 42.15 | 61.93 | b | |||||||||
1973 | 46.60 | 52.73 | 50.42 | 60.68 | 72.56 | 78.05 | 80.40 | ----- | z | ----- | z | 62.87 | 52.74 | a | 46.84 | 60.39 | b | |||||||||
1974 | 47.13 | 49.88 | 55.27 | a | 58.60 | 69.02 | 76.58 | 80.45 | 79.25 | a | 77.27 | 66.40 | 52.40 | 45.77 | 63.17 | |||||||||||
1975 | 43.48 | 50.96 | a | 53.97 | 54.38 | 68.85 | 75.58 | 79.44 | 77.98 | d | 74.72 | l | 62.31 | 50.08 | 45.58 | 60.24 | a | |||||||||
1976 | 46.05 | a | 51.52 | 53.98 | c | 58.21 | a | 71.39 | 74.93 | a | 81.10 | a | 74.45 | 73.30 | c | 66.10 | 55.10 | 45.86 | j | 64.19 | a | |||||
1977 | 43.34 | 52.71 | 51.42 | 63.35 | 61.24 | 78.98 | 81.35 | 80.98 | 73.67 | 66.05 | 54.78 | 50.20 | c | 63.17 | ||||||||||||
1978 | ----- | z | 50.68 | 57.14 | b | 56.52 | 67.47 | a | 74.05 | a | 80.23 | 80.15 | d | 70.32 | b | 67.84 | c | 49.70 | 41.16 | 63.20 | a | |||||
1979 | 46.39 | 48.30 | a | 55.17 | a | ----- | z | 68.21 | c | 76.26 | e | 80.34 | 77.05 | b | 76.50 | a | 66.44 | 53.30 | ----- | z | 64.80 | b | ||||
1980 | 49.79 | 53.64 | 53.15 | 60.90 | 65.08 | 70.97 | 80.20 | c | 78.03 | a | ----- | z | 66.47 | 54.88 | 47.45 | a | 61.87 | a | ||||||||
1981 | 50.60 | a | 52.32 | 54.19 | 62.02 | a | 69.55 | a | 79.98 | 80.11 | 79.35 | 75.53 | 61.27 | 56.65 | 49.63 | 64.27 | ||||||||||
1982 | 43.21 | c | 52.00 | c | 53.72 | d | 58.62 | a | 69.26 | b | 72.35 | ----- | z | 78.67 | b | 72.96 | d | 64.85 | a | 51.27 | 45.98 | a | 60.26 | a | ||
1983 | 43.64 | b | 52.00 | 54.89 | 55.43 | 69.63 | e | 74.93 | 76.43 | c | 79.41 | c | 76.88 | a | 66.97 | b | 55.07 | 50.66 | b | 62.99 | ||||||
1984 | 46.55 | 52.30 | a | 59.42 | 59.93 | a | 73.22 | d | 76.31 | c | 85.64 | b | 81.58 | 79.43 | a | 61.73 | 53.31 | a | 45.66 | 64.59 | ||||||
1985 | 43.23 | 50.89 | 52.20 | a | 66.74 | a | 68.50 | b | 80.48 | 84.60 | a | 79.05 | a | 71.03 | 63.71 | 52.79 | a | 43.65 | 63.07 | |||||||
1986 | 54.24 | 55.02 | b | 60.50 | b | 62.33 | 71.40 | e | 78.88 | e | 81.84 | c | 84.03 | a | 71.02 | f | 66.33 | e | 57.29 | b | 46.77 | a | 65.33 | a | ||
1987 | 46.02 | b | 52.48 | f | 56.98 | a | 68.33 | a | 72.85 | e | 78.88 | f | 78.00 | h | 81.28 | d | 76.38 | f | 71.35 | g | 53.81 | a | 47.62 | a | 60.98 | e |
1988 | 48.95 | a | 54.35 | b | 58.74 | d | 62.83 | 68.93 | d | 75.90 | f | 87.19 | b | 82.22 | a | 77.22 | c | 70.32 | a | 55.98 | a | 47.48 | c | 64.93 | a | |
1989 | 45.17 | a | 49.84 | c | 60.16 | b | 67.89 | c | 69.88 | b | 77.13 | c | 83.08 | e | 80.67 | d | 75.25 | d | 65.84 | b | 56.33 | 46.17 | a | 64.78 | ||
1990 | 48.23 | 50.22 | a | 59.48 | c | 67.91 | b | 69.57 | a | 78.24 | c | 84.90 | b | 82.74 | b | 77.08 | 69.90 | e | 55.26 | a | 43.45 | a | 65.58 | |||
1991 | 49.23 | 58.28 | a | 53.10 | a | 61.52 | b | 67.81 | b | 76.33 | a | 85.52 | c | 80.32 | a | 81.61 | b | 72.52 | c | ----- | z | 47.92 | 66.74 | a | ||
1992 | 44.68 | a | 56.41 | a | 57.90 | b | 66.59 | a | ----- | z | 78.20 | ----- | z | 84.43 | b | 78.07 | 70.23 | a | 56.05 | 46.03 | a | 63.86 | b | |||
1993 | 47.34 | 51.93 | a | 60.13 | d | 62.72 | c | 70.47 | a | 76.31 | a | 81.14 | c | 80.80 | d | ----- | z | 69.13 | 54.85 | 47.06 | 63.81 | a | ||||
1994 | 48.62 | a | 50.98 | a | 59.82 | a | 64.70 | 70.32 | c | 78.78 | e | 84.38 | a | 83.24 | d | 76.93 | 65.30 | a | 50.53 | 47.05 | 65.05 | |||||
1995 | 51.97 | a | 54.48 | a | 56.77 | 61.53 | 67.68 | 75.29 | a | 81.78 | a | 82.21 | 77.20 | b | 68.59 | b | 61.07 | a | 51.84 | 65.87 | ||||||
1996 | 50.47 | a | 55.19 | c | 59.15 | a | 64.84 | a | 71.61 | d | 79.52 | b | 86.41 | d | 84.44 | e | 76.12 | e | 66.46 | c | 55.53 | 51.05 | b | 66.73 | ||
1997 | 51.15 | 53.33 | a | 61.36 | c | 65.59 | b | 75.88 | a | 77.25 | 82.23 | 81.73 | c | 78.45 | b | 65.46 | c | 58.05 | b | 46.80 | a | 66.44 | ||||
1998 | 50.59 | b | 50.96 | 56.52 | c | 59.22 | a | 62.22 | a | 73.22 | c | 83.19 | d | 84.77 | c | 76.98 | c | 63.13 | a | 53.73 | 44.58 | 63.26 | ||||
1999 | 45.72 | b | 51.68 | 54.72 | d | 61.10 | a | 69.07 | c | 76.66 | a | 81.37 | e | 79.20 | a | 78.12 | b | 69.52 | c | 57.94 | c | 48.52 | 64.47 | |||
2000 | 52.00 | b | 54.46 | b | 57.10 | e | 65.11 | b | 72.07 | c | 80.55 | 79.29 | b | 82.71 | g | 75.58 | d | 64.63 | d | 50.72 | a | 50.13 | a | 63.79 | a | |
2001 | 46.69 | 50.11 | a | 59.77 | c | 59.98 | b | 77.63 | a | 80.59 | c | 83.28 | b | 82.62 | e | 78.39 | b | 69.69 | b | 57.35 | d | 48.97 | a | 66.26 | ||
2002 | 45.85 | e | 53.98 | a | 57.43 | b | 65.78 | g | 70.61 | c | 80.95 | h | 85.55 | c | 81.25 | c | 78.57 | 65.36 | b | 56.18 | 50.50 | b | 64.53 | b | ||
2003 | 50.61 | 51.30 | a | 58.90 | b | 58.10 | a | 69.20 | d | 78.97 | a | 86.18 | c | 81.79 | b | 80.19 | d | 70.07 | a | 52.53 | a | 51.62 | a | 65.79 | ||
2004 | 47.97 | a | 51.11 | a | 63.43 | b | 63.93 | h | 71.70 | c | 78.46 | c | 83.89 | 81.95 | c | 76.11 | b | 64.83 | a | 51.20 | j | 47.76 | h | 68.83 | c | |
2005 | 48.69 | 54.71 | i | 57.81 | 60.33 | 70.19 | 74.07 | g | 87.42 | a | 84.32 | a | 73.34 | b | 65.60 | e | 58.24 | m | 52.44 | 66.68 | c | |||||
2006 | 49.60 | 54.05 | h | 50.69 | g | 60.77 | 73.33 | g | 81.92 | q | 88.18 | a | 81.18 | 77.94 | n | 63.89 | l | 57.41 | s | 48.68 | i | 69.93 | h | |||
2007 | 45.72 | a | 53.06 | a | 62.54 | q | 62.25 | n | 74.33 | k | 78.88 | a | 83.37 | a | 83.55 | b | 74.03 | 63.84 | b | 57.98 | e | 46.22 | b | 65.18 | c | |
2008 | 47.68 | 51.00 | 57.34 | b | 61.13 | 71.40 | b | 78.98 | d | 86.58 | e | 86.05 | 78.67 | 67.13 | 57.66 | a | 46.19 | 65.82 | ||||||||
2009 | 48.47 | 51.88 | 56.55 | 62.60 | 75.95 | 76.53 | 86.73 | 82.52 | 80.65 | 64.63 | 55.03 | a | 47.81 | 65.78 | ||||||||||||
2010 | 48.87 | a | 51.95 | 54.83 | b | 58.63 | g | 64.32 | l | 78.34 | b | 85.98 | f | 81.48 | 76.74 | a | 67.85 | a | 54.13 | c | 51.52 | b | 62.86 | c | ||
2011 | 46.80 | a | 48.85 | k | 55.22 | b | 61.15 | c | 65.75 | c | 74.32 | 82.53 | b | 82.53 | 80.71 | b | 67.92 | a | 53.38 | 46.31 | 65.15 | a | ||||
2012 | 50.50 | 52.78 | b | 55.66 | b | 59.45 | t | 72.44 | 77.59 | b | 82.97 | a | 86.52 | h | 82.45 | k | 69.44 | w | ----- | z | ----- | z | 65.32 | f | ||
2013 | ----- | z | 48.46 | n | 60.15 | 67.18 | 74.75 | i | 83.39 | c | 88.66 | 83.77 | 77.17 | 65.39 | 57.47 | a | 48.00 | 70.13 | c | |||||||
2014 | 55.13 | a | 55.96 | 60.85 | 66.17 | 73.91 | c | 80.81 | d | 87.91 | b | 84.81 | 81.80 | b | 70.84 | b | 57.52 | 52.78 | d | 69.04 | ||||||
2015 | 49.52 | 57.66 | 63.80 | a | 64.98 | c | 69.71 | c | 82.68 | 84.62 | b | 84.23 | 80.10 | a | 72.76 | 53.13 | 47.85 | 67.59 | ||||||||
2016 | 51.52 | a | 55.74 | 59.54 | c | 66.33 | a | 71.06 | 82.58 | f | 83.46 | g | 84.00 | b | 77.86 | a | 67.34 | 58.78 | c | 48.52 | 64.07 | b | ||||
2017 | 49.09 | b | 54.78 | e | 58.73 | 61.96 | b | 72.04 | d | 82.31 | f | 87.33 | b | 87.12 | a | 78.10 | 66.27 | g | 58.41 | h | 49.35 | h | 68.64 | d | ||
2018 | 53.79 | l | 53.35 | k | 56.56 | m | 65.74 | g | 71.17 | b | 78.39 | c | 88.92 | e | 84.11 | i | 77.18 | m | 65.96 | q | 57.28 | e | 49.62 | e | 69.08 | g |
2019 | 49.36 | f | 46.71 | i | 55.58 | s | 61.93 | w | 64.08 | y | ----- | z | ----- | z | ----- | z | 76.39 | p | 64.41 | t | 56.83 | r | 49.78 | d | 49.78 | k |
2020 | 48.08 | g | 53.11 | t | 56.64 | x | 60.75 | x | 75.44 | w | 79.60 | t | 84.41 | t | 83.94 | w | 81.75 | t | 71.15 | u | ----- | z | 46.67 | y | ----- | z |
2021 | 51.20 | u | 55.14 | u | 53.60 | u | 66.78 | u | ----- | z | 86.07 | w | 92.00 | q | 87.00 | f | 80.89 | l | 65.83 | j | 57.57 | o | 48.94 | m | ----- | z |
2022 | 51.00 | t | 56.25 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.10 | y | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.04 | 51.62 | 55.83 | 61.32 | 68.94 | 76.20 | 82.71 | 80.77 | 75.97 | 65.82 | 54.35 | 47.17 | 63.76 | |||||||||||||
S.D. | 3.24 | 2.74 | 3.18 | 3.53 | 3.27 | 3.10 | 2.86 | 2.72 | 2.78 | 2.75 | 2.59 | 2.66 | 1.77 | |||||||||||||
SKEW | -0.07 | 0.20 | 0.36 | -0.31 | -0.08 | -0.12 | 0.21 | -0.07 | 0.16 | 0.34 | 0.23 | 0.05 | 0.88 | |||||||||||||
MAX | 55.13 | 58.28 | 63.80 | 68.33 | 77.63 | 83.39 | 88.92 | 87.12 | 82.75 | 72.76 | 61.07 | 52.78 | 69.04 | |||||||||||||
MIN | 38.24 | 45.64 | 49.97 | 50.09 | 61.24 | 69.23 | 76.43 | 74.45 | 70.32 | 60.29 | 49.70 | 41.16 | 61.30 | |||||||||||||
YRS | 73 | 70 | 74 | 70 | 72 | 69 | 71 | 73 | 66 | 71 | 71 | 72 | 46 |