YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 95.17 | 93.97 | 96.06 | 90.73 | 84.52 | 71.07 | 63.38 | b | 84.98 | e | ||||||
1939 | 63.10 | 61.50 | 74.71 | 82.97 | 90.94 | 99.40 | 95.87 | 92.48 | 92.47 | 81.81 | 62.73 | 65.42 | 80.28 | |||||||||||||
1940 | 52.71 | 64.79 | 75.97 | 83.73 | 88.00 | 90.63 | ----- | z | 92.87 | 90.50 | 79.94 | 64.50 | 62.29 | 76.90 | a | |||||||||||
1941 | 57.77 | 61.07 | 66.35 | 75.70 | 82.84 | 88.47 | 93.16 | 94.13 | 85.57 | 79.42 | 69.37 | 62.23 | 76.34 | |||||||||||||
1942 | 57.77 | 63.79 | 71.32 | 79.17 | 87.97 | 97.73 | 96.97 | 92.48 | 84.77 | 78.38 | b | 73.37 | 65.15 | d | 79.07 | |||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | 54.84 | 63.34 | 69.03 | 88.50 | 90.84 | 99.63 | 97.26 | 97.48 | 89.50 | 77.77 | 66.70 | 64.48 | 79.95 | |||||||||||||
1949 | 46.13 | 64.96 | 74.58 | 74.37 | 90.68 | 95.30 | 97.23 | 93.52 | 87.80 | 76.77 | 75.60 | 60.58 | 78.13 | |||||||||||||
1950 | 66.29 | 69.07 | 74.52 | 82.20 | 90.84 | 96.90 | 94.35 | 96.39 | 87.73 | 86.06 | 72.03 | 65.00 | 81.78 | |||||||||||||
1951 | 59.94 | 66.82 | 71.45 | 79.50 | 91.26 | 98.17 | 100.61 | 99.29 | 92.60 | 83.42 | 67.13 | 64.61 | 81.23 | |||||||||||||
1952 | 67.58 | 66.93 | 69.90 | a | 78.70 | 88.29 | 97.57 | 93.48 | 100.23 | 88.90 | 82.10 | 62.60 | 60.52 | 79.73 | ||||||||||||
1953 | 69.42 | 64.29 | 77.26 | 81.73 | 89.81 | 101.97 | 100.32 | 97.03 | 94.20 | 79.81 | 68.70 | 55.48 | 81.67 | |||||||||||||
1954 | 63.58 | 71.29 | 71.65 | 84.10 | 85.42 | 95.33 | 99.32 | 97.00 | 94.90 | 80.90 | 70.87 | 64.45 | 81.57 | |||||||||||||
1955 | 55.77 | 63.11 | 75.17 | a | 85.60 | 89.35 | 95.93 | 93.52 | 94.65 | 91.47 | 81.68 | 67.60 | 64.23 | 79.84 | ||||||||||||
1956 | 62.52 | 61.52 | 76.03 | 79.33 | 94.26 | 100.03 | 98.71 | 98.03 | 93.23 | 84.10 | 66.33 | 62.81 | 81.41 | |||||||||||||
1957 | 59.77 | 67.71 | 71.45 | 77.97 | 85.58 | 95.63 | 98.74 | 97.16 | 90.67 | 73.81 | 59.63 | 64.32 | 78.54 | |||||||||||||
1958 | 55.55 | 58.39 | 61.74 | 76.93 | 89.81 | 98.20 | 99.97 | 96.16 | 86.70 | 71.90 | 67.67 | 59.77 | 76.90 | |||||||||||||
1959 | 60.10 | 61.11 | 72.32 | 77.90 | 89.19 | 95.40 | 93.13 | 96.97 | 92.90 | 79.03 | 62.43 | 59.94 | 78.37 | |||||||||||||
1960 | 56.23 | 58.07 | 68.77 | 83.90 | 90.77 | 98.90 | 93.58 | 93.77 | 91.17 | 81.32 | 68.77 | 52.16 | 78.12 | |||||||||||||
1961 | 54.13 | 65.07 | 72.61 | 83.33 | 90.55 | 93.40 | 93.26 | 94.06 | 89.33 | 81.65 | 60.37 | 59.16 | 78.08 | |||||||||||||
1962 | 54.39 | 70.54 | 67.87 | 81.50 | 93.74 | 94.20 | 96.58 | 99.68 | 87.77 | 81.58 | 69.40 | 58.71 | 79.66 | |||||||||||||
1963 | 56.61 | 64.93 | 75.74 | 85.90 | 90.61 | 93.47 | 97.90 | 95.84 | 90.50 | 85.16 | 68.97 | 53.42 | 79.92 | |||||||||||||
1964 | 59.26 | 59.55 | 72.87 | 83.57 | 89.71 | 96.80 | 99.39 | 98.48 | 85.70 | 80.58 | 69.07 | 60.97 | 79.66 | |||||||||||||
1965 | 63.03 | 59.14 | 63.74 | 84.60 | 87.84 | 93.67 | 97.87 | 93.87 | 89.57 | 81.94 | 74.20 | 62.16 | 79.30 | |||||||||||||
1966 | 52.90 | 59.07 | 74.10 | 77.60 | 86.39 | 92.73 | 98.61 | 91.06 | 87.73 | 77.23 | 73.67 | 60.32 | 77.62 | |||||||||||||
1967 | 62.74 | 64.86 | 79.42 | 84.80 | 89.06 | 94.43 | 96.23 | 92.39 | 85.20 | 81.65 | 68.47 | 54.97 | 79.52 | |||||||||||||
1968 | 57.23 | 59.52 | 67.58 | 77.33 | 88.77 | 96.30 | 92.71 | 92.94 | 86.87 | 81.42 | 64.70 | 60.87 | 77.19 | |||||||||||||
1969 | 65.10 | a | 64.11 | 62.61 | 81.47 | 88.23 | 94.87 | 98.94 | 97.81 | 88.93 | 74.35 | 65.97 | 62.48 | 78.74 | ||||||||||||
1970 | 60.37 | a | 63.61 | 66.06 | 78.70 | 88.68 | 92.37 | 96.00 | 95.97 | 87.33 | 74.03 | 69.00 | 66.48 | 78.22 | ||||||||||||
1971 | 63.84 | 64.11 | 76.29 | 79.30 | 88.26 | 93.37 | 95.03 | 87.52 | 85.83 | 77.58 | 69.37 | 61.32 | 78.48 | |||||||||||||
1972 | 62.16 | 68.79 | 78.19 | 88.03 | 85.26 | 94.67 | 95.23 | 91.81 | 89.27 | 77.97 | 62.20 | 60.19 | 79.48 | |||||||||||||
1973 | 52.42 | 57.93 | 70.35 | 76.27 | 86.68 | 94.70 | 92.45 | 94.45 | 88.43 | 83.35 | 73.63 | 63.71 | 77.87 | |||||||||||||
1974 | 59.90 | 66.61 | 79.61 | 81.30 | 91.77 | 96.53 | 96.03 | 90.39 | 77.07 | 75.81 | 65.27 | 58.13 | 78.20 | |||||||||||||
1975 | 59.81 | 64.36 | 71.03 | 79.20 | 87.71 | 96.43 | 89.06 | 93.13 | 83.53 | 82.60 | a | 70.23 | 62.23 | 78.28 | ||||||||||||
1976 | 59.13 | 73.86 | 73.67 | a | 82.33 | 84.61 | 94.47 | 89.71 | 95.00 | 84.73 | 73.06 | 59.17 | 58.71 | 77.37 | ||||||||||||
1977 | 54.03 | 65.93 | 71.45 | 79.70 | 90.55 | 97.17 | 97.23 | 98.77 | 96.43 | 79.52 | 71.03 | 65.58 | 80.62 | |||||||||||||
1978 | 52.55 | 57.75 | 73.55 | 86.90 | 90.26 | 95.23 | 97.68 | 93.81 | 83.33 | 77.74 | 64.00 | 57.19 | 77.50 | |||||||||||||
1979 | 50.94 | 63.18 | 70.03 | 81.00 | 86.65 | 92.07 | 97.10 | 92.45 | 89.93 | 85.77 | 64.47 | 60.29 | 77.82 | |||||||||||||
1980 | 59.13 | 65.07 | 70.71 | 79.27 | 87.45 | 101.70 | 101.84 | 96.32 | 86.73 | 75.97 | 62.50 | 62.06 | 79.06 | |||||||||||||
1981 | 55.84 | 64.32 | 66.61 | 79.17 | 85.26 | 95.07 | 96.58 | 90.48 | 86.93 | 75.81 | 73.57 | 65.23 | 77.91 | |||||||||||||
1982 | 60.83 | a | 62.27 | b | 73.58 | ----- | z | 87.55 | 95.40 | 98.35 | 97.10 | 92.17 | 79.94 | 64.50 | 55.23 | 78.81 | a | |||||||||
1983 | 58.48 | 65.54 | 74.26 | 78.13 | 90.71 | 96.33 | 98.71 | 98.00 | 93.47 | 82.16 | 73.63 | 58.45 | 80.66 | |||||||||||||
1984 | 55.42 | 69.45 | 76.03 | 83.63 | 91.42 | 91.53 | 95.87 | 94.26 | 88.43 | 76.52 | 68.80 | 64.61 | 79.66 | |||||||||||||
1985 | 58.42 | 63.68 | 75.32 | 85.73 | 91.81 | 94.70 | 96.77 | 99.35 | e | 91.00 | k | 78.30 | h | 74.86 | i | 63.36 | i | 83.22 | d | |||||||
1986 | 67.87 | h | 72.50 | h | 76.62 | j | 88.68 | h | 92.41 | i | 91.62 | i | 95.87 | h | 96.24 | j | ----- | z | 79.82 | i | 68.60 | j | 60.61 | m | ----- | z |
1987 | 63.64 | i | 66.15 | h | 69.12 | n | 78.50 | h | 86.38 | o | 93.09 | h | 96.17 | h | 97.43 | j | 89.68 | h | 86.27 | i | 72.81 | i | 65.77 | i | ----- | z |
1988 | 60.62 | o | 64.86 | 73.48 | 80.83 | 88.13 | 94.27 | 93.16 | 93.32 | 89.00 | 81.81 | 72.73 | 59.42 | 81.00 | a | |||||||||||
1989 | 61.32 | 59.71 | 76.00 | 84.00 | 92.81 | 95.13 | 97.52 | 94.26 | 86.87 | 81.77 | 69.50 | 54.42 | 79.44 | |||||||||||||
1990 | 63.29 | 67.18 | 69.94 | 79.20 | 89.03 | 102.73 | 90.65 | 91.42 | 87.00 | 80.13 | 70.63 | 60.00 | 79.27 | |||||||||||||
1991 | 54.00 | 66.50 | 73.52 | 83.90 | 92.81 | 97.40 | 92.84 | 93.48 | 82.53 | 81.58 | 63.10 | 58.26 | 78.33 | |||||||||||||
1992 | 54.97 | 65.52 | 74.87 | 82.13 | 82.84 | 94.50 | 96.58 | 94.00 | 93.20 | 84.32 | 64.80 | 61.19 | 79.08 | |||||||||||||
1993 | 56.97 | 62.86 | 72.65 | 82.23 | 89.94 | 96.33 | 97.06 | 96.58 | 89.43 | 79.03 | 66.07 | 63.06 | 79.35 | |||||||||||||
1994 | 59.65 | 66.43 | 74.10 | 82.27 | 87.58 | 101.97 | 99.81 | 97.29 | 89.47 | 80.94 | 70.87 | 63.55 | 81.16 | |||||||||||||
1995 | 60.26 | 68.89 | 71.35 | 81.87 | 87.32 | 93.53 | 99.06 | 96.68 | 87.43 | 83.29 | 71.47 | 61.35 | 80.21 | |||||||||||||
1996 | 62.61 | 68.38 | 71.00 | 81.77 | 99.03 | 99.43 | 98.03 | 92.45 | 87.03 | 82.26 | 70.10 | 66.39 | 81.54 | |||||||||||||
1997 | 55.55 | 58.96 | 74.52 | 75.83 | 87.48 | 94.57 | 98.03 | 96.42 | 90.73 | 80.35 | 66.83 | 56.58 | 77.99 | |||||||||||||
1998 | 65.32 | 63.89 | 71.00 | 79.53 | 96.19 | 102.07 | 100.94 | 94.32 | 93.73 | 82.06 | 71.13 | 58.87 | 81.59 | |||||||||||||
1999 | 66.16 | 74.32 | 73.48 | 83.23 | 89.55 | 94.67 | 96.23 | 99.29 | 90.27 | 82.48 | 76.13 | 61.74 | 82.30 | |||||||||||||
2000 | 65.90 | 74.03 | 77.26 | 85.57 | 96.42 | 94.00 | 101.52 | 98.84 | 95.53 | 77.87 | 59.23 | 54.26 | 81.70 | |||||||||||||
2001 | 53.94 | 64.89 | a | 66.16 | 84.70 | 92.48 | 99.50 | 100.87 | 96.06 | 90.73 | 82.84 | 67.83 | 61.65 | 80.14 | ||||||||||||
2002 | 65.55 | 63.75 | 74.26 | 89.80 | 95.48 | 101.27 | 98.55 | 102.23 | 93.42 | d | 76.19 | 65.70 | 60.42 | 82.22 | ||||||||||||
2003 | 64.06 | 64.68 | 76.84 | 89.03 | 96.42 | 99.40 | 100.26 | 100.39 | 91.90 | 85.10 | 72.57 | 66.42 | 83.92 | |||||||||||||
2004 | 62.65 | 61.72 | 76.45 | 79.20 | 95.29 | 100.00 | 99.50 | a | 96.39 | 90.07 | 80.19 | 64.67 | 62.16 | 80.69 | ||||||||||||
2005 | 65.61 | 63.14 | 72.87 | 83.83 | 91.32 | 101.77 | 100.74 | 97.13 | 99.77 | 80.77 | 77.30 | 67.19 | 83.45 | |||||||||||||
2006 | 72.29 | 70.54 | 77.77 | a | 91.37 | 100.87 | 102.80 | 103.61 | 98.35 | 88.83 | 83.00 | 76.37 | 63.13 | 85.74 | ||||||||||||
2007 | 54.13 | 69.75 | 78.68 | 81.07 | 85.84 | 97.53 | 96.10 | 98.13 | 93.97 | 90.29 | 73.37 | 66.10 | 82.08 | |||||||||||||
2008 | 62.55 | 75.52 | 79.71 | 88.20 | 96.39 | 104.83 | 93.87 | 93.26 | 83.90 | 79.81 | 69.93 | 63.52 | 82.62 | |||||||||||||
2009 | 64.48 | 71.54 | 76.74 | 83.67 | 91.13 | 97.77 | 97.32 | 98.97 | 88.77 | 79.68 | 72.90 | 56.13 | 81.59 | |||||||||||||
2010 | 59.84 | 59.79 | 72.58 | 80.90 | 90.39 | 100.70 | 91.97 | 98.19 | 92.10 | 84.00 | 71.50 | 65.84 | 80.65 | |||||||||||||
2011 | 62.58 | 65.18 | 82.84 | 90.90 | 92.52 | 105.03 | 101.61 | 103.06 | 92.30 | 84.45 | 71.03 | 52.61 | 83.68 | |||||||||||||
2012 | 64.52 | 64.21 | 79.97 | 89.13 | 90.32 | 100.67 | 96.13 | 98.97 | 89.47 | 79.52 | 74.10 | 64.42 | 82.62 | |||||||||||||
2013 | 57.45 | 65.96 | 75.94 | 82.33 | 90.55 | 99.53 | 93.35 | 98.19 | 90.07 | b | 81.48 | 67.55 | a | 57.90 | 80.03 | |||||||||||
2014 | 62.52 | 62.38 | g | 73.94 | 82.37 | 90.39 | 99.97 | 97.81 | 98.23 | 84.70 | 83.58 | 65.47 | 60.61 | 81.78 | a | |||||||||||
2015 | 54.19 | 62.18 | 69.87 | 81.57 | 86.16 | 95.63 | 101.00 | 100.42 | 93.80 | 79.81 | 70.42 | f | 63.16 | 80.71 | a | |||||||||||
2016 | 59.87 | a | 69.90 | 78.00 | 82.38 | i | 88.03 | 94.97 | 102.42 | 93.42 | 88.67 | 85.97 | 69.33 | 59.97 | 80.96 | a | ||||||||||
2017 | 61.29 | 72.50 | 79.96 | c | 83.40 | 89.68 | 98.42 | k | 96.88 | f | 93.16 | 89.80 | 79.84 | 74.50 | 60.03 | 78.42 | b | |||||||||
2018 | 60.42 | 66.61 | 77.97 | 84.37 | 98.85 | d | 99.76 | a | 98.32 | 98.42 | 86.60 | 74.32 | 65.53 | 58.06 | 80.77 | |||||||||||
2019 | 60.71 | 67.29 | 68.35 | 83.13 | 86.10 | 96.47 | 100.13 | 102.90 | 93.73 | 79.87 | 67.90 | 63.20 | a | 80.82 | ||||||||||||
2020 | 62.68 | 62.28 | 74.61 | 82.53 | 93.87 | 98.83 | 102.77 | 102.19 | 87.63 | 83.10 | 74.73 | 61.71 | 82.25 | |||||||||||||
2021 | 58.81 | 58.21 | 74.23 | 76.65 | d | 89.83 | a | 97.11 | c | 94.32 | 93.81 | o | 93.67 | 85.10 | 71.67 | c | 71.81 | 79.22 | a | |||||||
2022 | 59.19 | 60.50 | 72.84 | 86.37 | 95.83 | a | 98.50 | 100.94 | 93.48 | 89.17 | 78.42 | 62.83 | a | 60.74 | 79.90 | |||||||||||
2023 | 62.06 | 64.07 | 74.10 | 80.77 | 89.65 | 102.77 | 99.71 | q | 101.97 | 97.17 | 82.00 | 68.07 | 64.35 | 80.63 | a | |||||||||||
2024 | 58.35 | 69.62 | 73.15 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 67.04 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 59.66 | 64.95 | 73.25 | 82.22 | 90.15 | 97.02 | 97.08 | 96.06 | 89.53 | 80.56 | 68.58 | 61.28 | 79.98 | |||||||||||||
S.D. | 4.63 | 4.17 | 4.11 | 3.70 | 3.60 | 3.34 | 3.16 | 3.19 | 3.69 | 3.39 | 4.33 | 3.70 | 1.89 | |||||||||||||
SKEW | -0.07 | 0.40 | -0.47 | 0.33 | 0.65 | 0.25 | -0.29 | 0.04 | -0.16 | -0.24 | -0.19 | -0.29 | 0.51 | |||||||||||||
MAX | 72.29 | 75.52 | 82.84 | 91.37 | 100.87 | 105.03 | 103.61 | 103.06 | 99.77 | 90.29 | 77.30 | 71.81 | 85.74 | |||||||||||||
MIN | 46.13 | 57.75 | 61.74 | 74.37 | 82.84 | 88.47 | 89.06 | 87.52 | 77.07 | 71.90 | 59.17 | 52.16 | 76.34 | |||||||||||||
YRS | 78 | 78 | 79 | 76 | 78 | 78 | 76 | 78 | 78 | 78 | 77 | 78 | 68 |