YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.00 | k | 66.13 | 61.16 | 63.65 | j | ||
1939 | 56.90 | 54.04 | 71.71 | 82.03 | 88.97 | 97.48 | e | 101.35 | 98.80 | a | 89.83 | 81.00 | b | 71.30 | 65.20 | f | 81.22 | a | ||||||||
1940 | 60.52 | 63.41 | 74.65 | 79.27 | 91.19 | 99.60 | 101.77 | 99.13 | 90.04 | d | 81.35 | 66.07 | 59.74 | 80.56 | ||||||||||||
1941 | 57.39 | 63.63 | a | 67.72 | b | 68.07 | 84.42 | 92.17 | 98.68 | 95.74 | 89.32 | k | 74.04 | h | 70.50 | 58.81 | 75.71 | b | ||||||||
1942 | 60.83 | a | 60.14 | 69.06 | 77.33 | c | 86.87 | 97.33 | 103.23 | 98.74 | 94.48 | a | 81.58 | 73.83 | 63.68 | 80.59 | ||||||||||
1943 | 60.13 | 67.96 | 72.29 | 82.67 | 90.00 | 94.43 | 101.58 | 94.83 | a | 93.61 | g | 82.81 | 73.73 | 61.77 | 80.20 | a | ||||||||||
1944 | 61.58 | 57.69 | 66.43 | a | 71.97 | a | 85.10 | 91.77 | 99.74 | 101.94 | 92.68 | b | 83.35 | 64.43 | 59.52 | 78.02 | ||||||||||
1945 | 58.23 | 63.61 | 64.23 | 77.00 | 86.97 | 94.53 | 100.97 | 98.68 | 94.77 | 83.19 | 71.33 | 57.86 | j | 81.23 | a | |||||||||||
1946 | 57.06 | 65.39 | 72.52 | 83.63 | 86.77 | 99.97 | 99.37 | d | 96.45 | 93.50 | 77.35 | 64.43 | 62.06 | 79.88 | ||||||||||||
1947 | 57.26 | 70.25 | 74.39 | 81.48 | a | 90.97 | 94.87 | 103.41 | b | 96.45 | 96.40 | 82.74 | 63.67 | 56.73 | a | 80.72 | ||||||||||
1948 | 63.45 | 59.31 | 63.50 | c | 81.10 | 90.03 | 96.70 | 101.55 | 99.61 | 96.70 | 83.23 | 65.54 | b | 58.26 | 79.91 | |||||||||||
1949 | 45.10 | 56.96 | 70.17 | a | 79.30 | g | 85.80 | a | 95.37 | 99.97 | 99.64 | i | 95.07 | 75.96 | h | 75.03 | 58.16 | 75.74 | c | |||||||
1950 | 57.17 | a | 67.25 | 70.84 | 82.40 | 86.39 | 97.87 | 96.03 | 99.08 | g | 91.03 | 91.19 | 74.79 | a | 68.73 | a | 80.34 | a | ||||||||
1951 | 60.46 | c | 62.89 | a | 70.34 | b | 77.00 | b | 87.29 | c | 95.30 | 103.74 | 97.03 | 96.40 | 82.55 | 66.77 | 55.30 | a | 79.59 | |||||||
1952 | 57.00 | 63.32 | a | 62.10 | b | 77.83 | a | 90.90 | 98.10 | a | 100.19 | 99.40 | a | 96.59 | a | 90.17 | a | 64.18 | b | 57.90 | a | 79.81 | ||||
1953 | 65.39 | 65.80 | c | 73.07 | a | 79.04 | b | 82.78 | d | 99.38 | a | 99.55 | 98.03 | 99.00 | 83.67 | a | 73.29 | b | 60.11 | d | 81.59 | |||||
1954 | 60.57 | a | 74.23 | b | 68.30 | a | 85.13 | 91.13 | 98.45 | h | 100.39 | h | 95.29 | 94.86 | a | 86.29 | 75.67 | 61.90 | j | 81.27 | c | |||||
1955 | 53.67 | a | 60.64 | 72.35 | h | 78.43 | 87.60 | a | 95.31 | a | 97.39 | 95.42 | 96.73 | 87.90 | 69.80 | 63.87 | 80.62 | a | ||||||||
1956 | 63.10 | 61.41 | 77.52 | 77.07 | b | 90.58 | 100.92 | d | 100.48 | d | 98.45 | 100.82 | b | 83.26 | 68.89 | c | 62.43 | a | 82.08 | |||||||
1957 | 60.05 | i | 69.64 | 70.19 | 75.66 | a | 79.62 | e | 101.35 | j | 100.42 | 96.26 | 97.43 | b | 76.70 | a | 63.46 | b | 63.22 | d | 79.26 | b | ||||
1958 | 62.16 | 65.36 | 62.32 | 75.71 | b | 93.55 | 99.41 | a | 102.77 | 100.70 | a | 91.27 | 82.58 | 69.10 | a | 67.10 | b | 81.00 | ||||||||
1959 | 64.41 | b | 63.31 | b | 75.77 | 84.41 | c | 86.16 | 100.90 | 103.42 | 93.61 | 94.70 | 88.20 | a | 70.17 | 60.06 | 82.09 | |||||||||
1960 | 53.68 | 59.26 | b | 76.55 | 82.72 | a | 90.16 | 101.80 | 104.52 | 101.13 | 96.13 | 77.97 | 70.50 | 60.10 | 81.21 | |||||||||||
1961 | 64.45 | 67.82 | 71.19 | 81.14 | a | 88.42 | 102.13 | 103.03 | 97.77 | 90.03 | 81.97 | 65.31 | a | 56.87 | 80.85 | |||||||||||
1962 | 59.58 | 64.25 | 65.87 | 85.50 | 86.16 | 97.80 | 101.45 | 102.52 | 93.67 | 85.71 | 74.67 | 64.77 | 81.83 | |||||||||||||
1963 | 58.35 | 71.61 | 71.77 | a | 76.50 | 92.34 | b | 94.60 | 104.19 | 95.93 | a | 94.93 | 85.71 | 69.34 | a | 62.77 | a | 81.50 | ||||||||
1964 | 59.50 | a | 63.00 | 67.45 | 75.43 | 87.13 | 95.97 | 101.90 | 95.52 | 91.03 | 89.42 | 65.37 | 58.71 | 79.20 | ||||||||||||
1965 | 62.42 | 64.82 | 65.90 | 73.57 | 82.48 | 90.93 | 99.84 | 99.19 | 89.00 | 88.39 | 71.33 | 57.74 | 78.80 | |||||||||||||
1966 | 56.90 | 59.82 | 74.90 | 82.50 | 90.74 | 97.40 | 102.19 | 99.10 | 93.07 | 83.10 | 72.77 | 60.19 | 81.06 | |||||||||||||
1967 | 62.87 | 70.32 | 75.77 | 73.87 | 87.06 | 91.97 | 99.81 | 98.23 | 91.30 | 85.30 | a | 72.63 | 48.65 | 79.81 | ||||||||||||
1968 | 54.45 | 67.66 | 70.58 | 74.27 | 86.16 | 97.40 | 98.32 | 93.35 | 93.63 | 82.90 | 67.33 | 55.55 | 78.47 | |||||||||||||
1969 | 60.42 | 60.46 | 66.42 | 79.87 | 89.32 | 94.33 | 100.45 | 101.68 | 93.50 | 77.29 | 67.33 | 60.94 | 79.33 | |||||||||||||
1970 | 58.52 | 67.93 | 67.23 | 73.20 | 89.48 | 98.47 | 101.48 | 99.10 | 89.23 | 77.55 | 71.43 | 57.35 | 79.25 | |||||||||||||
1971 | 62.32 | 65.29 | 75.57 | a | 77.83 | 83.10 | 97.40 | 104.23 | 96.42 | 93.70 | 74.71 | 68.40 | 53.61 | 79.38 | ||||||||||||
1972 | 63.26 | 71.21 | 83.00 | 83.43 | 89.94 | 96.07 | 103.74 | 98.35 | 92.43 | 76.19 | 63.50 | 56.52 | 81.47 | |||||||||||||
1973 | 57.52 | 61.39 | 59.00 | 73.87 | 89.23 | 98.43 | 101.42 | 98.94 | 94.66 | a | 85.55 | 68.30 | 62.77 | a | 79.25 | |||||||||||
1974 | 57.61 | 65.37 | a | 72.58 | 79.93 | 91.00 | a | 104.67 | 99.71 | 99.55 | 93.07 | a | 81.03 | 67.83 | 56.10 | 80.70 | ||||||||||
1975 | 59.27 | a | 63.29 | 66.23 | a | 71.38 | a | 86.06 | 96.20 | 101.19 | 101.23 | 92.93 | 83.55 | 71.30 | 62.32 | 79.58 | ||||||||||
1976 | 64.45 | 65.89 | b | 68.81 | 76.73 | 87.68 | 98.37 | 99.13 | a | 98.07 | a | 88.97 | 79.45 | 72.90 | 63.55 | 80.33 | ||||||||||
1977 | 58.50 | a | 70.04 | 69.33 | d | 82.63 | 83.26 | 100.20 | 101.47 | a | 99.03 | 93.67 | 83.10 | 72.52 | a | 64.55 | 81.52 | |||||||||
1978 | 59.29 | 62.26 | a | 71.94 | 77.13 | 87.82 | c | 100.79 | a | 103.65 | 99.11 | c | 93.90 | 87.30 | a | 66.43 | 56.35 | 80.50 | ||||||||
1979 | 51.48 | 64.27 | b | 66.97 | 79.43 | 84.84 | 97.86 | a | 103.68 | 96.62 | e | 98.07 | 86.16 | 67.87 | 64.94 | 80.18 | ||||||||||
1980 | 58.90 | 65.36 | a | 66.35 | 78.00 | 81.84 | 99.83 | 104.65 | 99.39 | 95.63 | 85.07 | a | 73.93 | a | 67.61 | 81.38 | ||||||||||
1981 | 65.19 | 70.21 | 68.39 | 83.43 | 87.81 | 103.00 | 101.93 | c | 100.39 | c | 92.66 | a | 78.32 | 72.97 | 63.42 | 82.31 | ||||||||||
1982 | 58.61 | c | 65.00 | d | 66.62 | b | 78.10 | a | 87.10 | a | 95.72 | a | 100.33 | a | 98.10 | a | 91.40 | 81.76 | b | 64.75 | f | 56.46 | c | 79.93 | a | |
1983 | 60.80 | f | 62.39 | e | 66.73 | e | 71.09 | g | 88.00 | b | 96.00 | b | 100.21 | b | 97.04 | c | 94.62 | d | 80.00 | e | 67.27 | d | 59.68 | c | 81.19 | b |
1984 | 63.32 | f | 66.96 | d | 75.14 | b | 79.70 | g | 96.07 | a | 96.23 | d | 99.78 | d | 98.23 | e | 94.35 | d | 76.92 | e | 69.27 | d | 55.19 | e | 82.81 | b |
1985 | 58.64 | c | 61.25 | d | 69.72 | m | 82.83 | f | 88.38 | b | 99.97 | 102.00 | f | 100.36 | f | 87.08 | e | 80.76 | b | 65.79 | b | 63.19 | d | 75.63 | d | |
1986 | 69.18 | c | 66.95 | f | 75.74 | d | 78.70 | c | 88.10 | 96.13 | 95.29 | 96.35 | 86.97 | a | 78.03 | 69.20 | 58.42 | 81.10 | a | |||||||
1987 | 59.06 | 62.25 | 66.42 | 82.80 | 86.17 | a | 99.73 | 99.68 | 96.47 | a | 93.43 | 84.06 | 65.72 | a | 55.39 | c | 79.27 | |||||||||
1988 | 58.16 | 67.76 | 72.03 | 78.34 | a | 87.53 | a | 97.72 | a | 100.87 | 95.68 | 91.90 | 88.30 | a | 70.70 | 60.97 | a | 80.83 | ||||||||
1989 | 59.00 | 67.26 | a | 78.07 | b | 88.00 | 90.35 | 99.00 | 103.71 | 98.03 | 95.87 | 82.71 | 74.10 | 62.65 | 83.23 | |||||||||||
1990 | 59.23 | 63.96 | d | 73.38 | e | 79.80 | e | 85.57 | c | 101.34 | a | 96.55 | 94.77 | 92.10 | 84.04 | h | 70.70 | 56.07 | c | 79.41 | a | |||||
1991 | 58.39 | 72.25 | 63.43 | a | 77.67 | 84.83 | b | 93.60 | 100.58 | 98.83 | a | 92.23 | 85.68 | 67.25 | b | 56.45 | 79.27 | |||||||||
1992 | 59.26 | 65.34 | 67.61 | 83.30 | 85.50 | a | 94.70 | 98.45 | 96.79 | c | 94.00 | 84.68 | 66.23 | 54.26 | 79.18 | |||||||||||
1993 | 57.87 | 59.79 | 72.90 | a | 81.20 | 89.39 | 96.03 | 98.26 | 96.17 | a | 93.97 | 79.26 | 65.07 | 60.37 | d | 79.19 | ||||||||||
1994 | 64.19 | 61.86 | 72.55 | 79.03 | a | 85.90 | 100.73 | 103.19 | 101.58 | 93.17 | 79.77 | 64.20 | 60.90 | 80.59 | ||||||||||||
1995 | 56.61 | 70.61 | 70.00 | 73.70 | 80.48 | 93.03 | 101.81 | 101.52 | 93.90 | 85.06 | 73.44 | e | 67.12 | n | 81.83 | a | ||||||||||
1996 | 64.16 | f | 69.90 | 73.06 | 82.20 | 91.16 | 100.10 | a | 101.81 | 100.32 | 87.33 | 81.42 | 70.03 | 62.06 | 83.58 | a | ||||||||||
1997 | 57.45 | 65.61 | 78.16 | 75.30 | 92.26 | 93.72 | a | 100.83 | a | 96.20 | a | 89.90 | a | 79.16 | 68.57 | 54.81 | 79.33 | |||||||||
1998 | 60.13 | 55.82 | 66.19 | 70.27 | 81.84 | 91.83 | 100.40 | a | 99.40 | a | 90.10 | 79.35 | 69.13 | 60.27 | a | 77.06 | ||||||||||
1999 | 64.29 | 69.26 | a | 75.13 | 71.89 | b | 85.10 | 94.43 | 93.50 | a | 97.10 | a | 89.08 | f | 85.19 | 74.80 | 61.06 | 79.25 | a | |||||||
2000 | 63.50 | c | 66.97 | 68.29 | 83.90 | 92.32 | 98.45 | a | 102.45 | 95.19 | 95.30 | 77.23 | 59.40 | 61.61 | 80.38 | |||||||||||
2001 | 56.40 | a | 62.00 | 72.93 | a | 77.63 | 94.03 | 100.47 | 100.42 | 98.26 | 98.93 | 85.71 | 72.10 | 56.55 | 81.29 | |||||||||||
2002 | 60.97 | 70.36 | 73.48 | 85.03 | a | 91.55 | 103.24 | a | 104.65 | 102.77 | 93.57 | 79.58 | 70.17 | 57.00 | 82.70 | |||||||||||
2003 | 68.42 | 63.25 | 70.68 | 77.37 | 91.06 | 100.03 | 107.10 | 100.65 | 95.79 | a | 89.32 | 66.00 | 60.57 | a | 82.52 | |||||||||||
2004 | 60.19 | 59.86 | a | 81.45 | 78.79 | a | 90.84 | 99.70 | 102.71 | 98.68 | 93.67 | ----- | z | 62.97 | a | 58.97 | 80.71 | a | ||||||||
2005 | 60.00 | 61.64 | 67.35 | 78.27 | 90.65 | 96.93 | 107.45 | i | 100.67 | v | 93.38 | a | 82.77 | 71.93 | 62.74 | 76.57 | b | |||||||||
2006 | 64.90 | 71.04 | 67.90 | a | 82.83 | a | 93.32 | 102.87 | 101.07 | a | 96.13 | 88.80 | 80.13 | 72.30 | 58.29 | 81.63 | ||||||||||
2007 | 57.00 | a | 65.46 | 76.50 | a | 81.93 | 91.35 | 101.28 | a | 102.39 | 100.00 | a | 94.47 | 83.90 | 76.04 | b | 55.37 | a | 82.14 | |||||||
2008 | 57.52 | b | 65.91 | f | 75.10 | b | 81.71 | f | 86.18 | c | 100.69 | a | 100.60 | a | 99.63 | d | 95.37 | c | 86.23 | e | 74.15 | j | 58.85 | e | 84.46 | c |
2009 | 64.30 | d | 66.88 | b | 74.27 | e | 79.61 | g | 92.16 | 93.04 | c | 103.53 | a | 102.08 | f | 95.79 | a | 80.74 | d | 74.57 | 56.26 | 80.15 | b | |||
2010 | 61.42 | 62.82 | 70.32 | 77.00 | 85.74 | 98.48 | a | 100.61 | 98.19 | 98.43 | 81.42 | 68.17 | 62.23 | 80.40 | ||||||||||||
2011 | 62.23 | 62.54 | 74.55 | 80.10 | 84.42 | 98.77 | 100.48 | b | 103.17 | b | 94.60 | 83.68 | 66.34 | a | 55.00 | a | 80.49 | |||||||||
2012 | 63.52 | 64.86 | 72.53 | a | 81.17 | 90.93 | a | 101.07 | 98.03 | 99.16 | 93.13 | 84.39 | 74.53 | 58.47 | a | 81.82 | ||||||||||
2013 | 57.74 | 60.57 | 75.45 | 80.37 | 88.45 | 102.63 | 98.13 | 96.74 | 89.66 | a | 78.81 | 69.10 | a | 58.10 | b | 79.65 | ||||||||||
2014 | 66.42 | 70.32 | 74.32 | 80.17 | 87.94 | 100.00 | 101.06 | 94.37 | a | 93.10 | 85.29 | 71.96 | b | 58.34 | b | 81.94 | ||||||||||
2015 | 60.65 | 71.68 | 76.93 | a | 80.43 | b | 81.87 | 101.07 | 98.41 | b | 101.10 | 95.14 | b | 83.23 | 65.83 | 57.37 | a | 81.14 | ||||||||
2016 | 58.16 | 73.00 | 76.45 | 78.40 | 85.29 | 102.03 | 102.25 | c | 96.00 | c | 89.70 | 86.84 | 71.30 | 59.58 | 81.58 | |||||||||||
2017 | 55.73 | a | 66.04 | c | 76.71 | 82.03 | 87.52 | 103.17 | 99.52 | 97.35 | 91.80 | 86.87 | 75.70 | 65.39 | 82.32 | |||||||||||
2018 | 67.43 | c | 66.41 | a | 73.03 | 86.05 | j | 91.30 | a | 101.55 | a | 102.86 | b | 98.65 | 98.07 | b | 75.71 | 68.70 | 60.42 | l | 84.37 | b | ||||
2019 | 67.00 | y | 56.32 | 71.30 | a | 80.83 | 78.87 | a | 97.03 | 102.87 | 101.77 | 92.50 | 82.55 | 71.20 | 57.45 | b | 81.15 | a | ||||||||
2020 | 61.76 | b | 65.00 | 67.28 | f | 78.81 | c | 93.50 | e | 97.97 | a | 102.94 | 105.06 | 97.87 | 89.35 | 74.13 | 61.65 | 84.37 | a | |||||||
2021 | 60.29 | 67.21 | 70.03 | 83.20 | 90.48 | 101.83 | 98.65 | 97.03 | 94.37 | 79.03 | a | 76.93 | 61.81 | 81.74 | ||||||||||||
2022 | 62.35 | 66.36 | 72.35 | 82.77 | 91.10 | j | 99.56 | e | 102.39 | c | 97.33 | a | 97.07 | a | 80.73 | a | 65.45 | a | 58.23 | a | 80.42 | a | ||||
2023 | 55.90 | b | 61.69 | b | 63.40 | a | 79.62 | a | 87.57 | a | 93.73 | d | 106.68 | 99.32 | 92.28 | a | 85.74 | 72.29 | b | 63.14 | c | 80.11 | ||||
2024 | 56.04 | f | 63.79 | 64.88 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.79 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.98 | 64.89 | 71.07 | 79.11 | 87.93 | 97.98 | 101.13 | 98.30 | 93.57 | 82.79 | 69.58 | 59.69 | 80.57 | |||||||||||||
S.D. | 3.80 | 4.21 | 4.58 | 3.85 | 3.46 | 3.16 | 2.37 | 2.32 | 2.86 | 3.72 | 3.76 | 3.51 | 1.26 | |||||||||||||
SKEW | -0.43 | -0.09 | -0.08 | -0.43 | -0.32 | -0.22 | -0.36 | 0.30 | -0.12 | 0.02 | -0.16 | 0.01 | -0.25 | |||||||||||||
MAX | 69.18 | 74.23 | 83.00 | 88.00 | 96.07 | 104.67 | 107.10 | 105.06 | 100.82 | 91.19 | 76.93 | 68.73 | 83.23 | |||||||||||||
MIN | 45.10 | 54.04 | 59.00 | 68.07 | 78.87 | 90.93 | 93.50 | 93.35 | 86.97 | 74.71 | 59.40 | 48.65 | 77.06 | |||||||||||||
YRS | 80 | 84 | 82 | 78 | 84 | 83 | 82 | 80 | 82 | 81 | 84 | 81 | 59 |