YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 90.10 | 93.00 | 93.27 | 79.83 | a | 81.87 | 66.39 | 84.08 | f | |||||
1950 | 59.90 | a | 69.11 | 72.58 | 76.13 | 75.13 | 84.27 | 91.65 | 92.26 | 83.73 | 85.97 | 78.50 | 75.68 | 78.74 | ||||||||||||
1951 | 65.94 | 68.79 | 72.97 | 72.70 | 81.35 | 83.30 | 94.48 | 91.48 | 92.03 | 83.23 | 72.77 | 62.06 | 78.43 | |||||||||||||
1952 | 60.45 | 66.31 | 62.13 | 72.37 | 83.84 | 78.40 | 92.87 | 93.94 | 92.97 | 84.77 | 66.83 | 64.00 | 76.57 | |||||||||||||
1953 | 70.26 | 71.07 | 71.77 | a | 69.40 | 76.03 | 81.19 | c | 95.19 | 90.84 | 90.37 | 83.55 | 75.23 | 71.00 | 78.82 | |||||||||||
1954 | 64.55 | 76.04 | 65.65 | 75.10 | 78.97 | 83.80 | 97.16 | 87.90 | 91.23 | 82.35 | 77.30 | 67.10 | 78.93 | |||||||||||||
1955 | 60.94 | 66.57 | 71.90 | 74.80 | 77.17 | a | 83.97 | 90.50 | a | 97.80 | a | 93.50 | 81.35 | 73.37 | 62.87 | 77.89 | ||||||||||
1956 | 65.32 | 63.17 | 75.74 | 71.07 | 76.23 | 88.53 | 92.29 | 90.39 | 97.53 | 78.77 | 81.00 | 72.48 | 79.38 | |||||||||||||
1957 | 59.84 | 69.29 | 72.55 | 74.03 | 75.27 | i | 92.30 | 97.19 | 94.16 | 90.33 | 76.84 | 71.37 | 71.94 | 79.08 | a | |||||||||||
1958 | 70.00 | 69.14 | 64.23 | a | 77.03 | 83.65 | 87.43 | 92.58 | 96.32 | 96.07 | 88.77 | 75.50 | 76.29 | 81.42 | ||||||||||||
1959 | 72.19 | 65.07 | 79.61 | 82.00 | 77.71 | 90.53 | 98.42 | 92.97 | 86.93 | 85.84 | 79.70 | 71.48 | 81.87 | |||||||||||||
1960 | 62.61 | 66.52 | 76.06 | 81.13 | 85.03 | 91.13 | 100.10 | 95.68 | 96.83 | 84.29 | 72.04 | c | 70.65 | 81.84 | ||||||||||||
1961 | 74.06 | 73.71 | 73.68 | 81.40 | 78.32 | 89.90 | 94.19 | 95.34 | b | 88.00 | 81.07 | a | 70.67 | 67.81 | 80.68 | |||||||||||
1962 | 69.42 | 63.15 | a | 66.97 | 83.50 | 77.81 | 83.83 | 91.71 | 98.71 | c | 91.47 | 82.90 | 75.47 | 71.52 | 79.70 | |||||||||||
1963 | 65.19 | 76.32 | 71.29 | 72.00 | 76.26 | 80.53 | 92.23 | 93.35 | 94.40 | 82.00 | 73.07 | 73.19 | 79.15 | |||||||||||||
1964 | 67.13 | a | 71.24 | 70.45 | 74.20 | 77.97 | 83.37 | 95.26 | 91.48 | 88.03 | 87.23 | 69.13 | 64.42 | 78.33 | ||||||||||||
1965 | 69.65 | 71.36 | 69.13 | 73.67 | 80.26 | 77.87 | 92.10 | 95.06 | 85.03 | a | 88.84 | 69.53 | 64.81 | 78.11 | ||||||||||||
1966 | 66.35 | 65.68 | 75.52 | 80.73 | 79.74 | 87.33 | 94.06 | 95.06 | 89.97 | 85.23 | 71.57 | 67.35 | 79.88 | |||||||||||||
1967 | 68.48 | 75.57 | 69.71 | 64.53 | 80.42 | 81.23 | 95.10 | 98.30 | a | 87.70 | 87.13 | 75.90 | 64.06 | 79.01 | ||||||||||||
1968 | 67.00 | 72.38 | 74.13 | 77.90 | 80.16 | 86.07 | 94.61 | 89.90 | 91.07 | 82.13 | 75.43 | 64.55 | 79.61 | |||||||||||||
1969 | 64.26 | 62.18 | 71.52 | 76.40 | 80.29 | 78.63 | 93.19 | 98.74 | 93.07 | 80.42 | 75.43 | 68.32 | 78.54 | |||||||||||||
1970 | 65.74 | 71.86 | 73.61 | 75.83 | 83.48 | 88.00 | 96.42 | 97.35 | 92.43 | 80.55 | 73.87 | 64.06 | 80.27 | |||||||||||||
1971 | 68.97 | 70.75 | 73.45 | 74.67 | 75.06 | 84.55 | a | 94.19 | 97.10 | 92.60 | 82.10 | 72.40 | 59.61 | 78.79 | ||||||||||||
1972 | 69.39 | 75.10 | 80.29 | 79.30 | 82.81 | 88.70 | 96.55 | 93.32 | 87.47 | 78.03 | 71.60 | 66.32 | 80.74 | |||||||||||||
1973 | 64.55 | 65.96 | 66.13 | 75.67 | 83.42 | 91.47 | 93.00 | 93.10 | 86.17 | 86.52 | 70.33 | 70.68 | 78.92 | |||||||||||||
1974 | 64.61 | 73.82 | 71.52 | 81.57 | 79.81 | 93.03 | 96.58 | 94.84 | 95.53 | 82.35 | 78.43 | 68.35 | 81.70 | |||||||||||||
1975 | 73.10 | 69.36 | 69.84 | 69.27 | 81.97 | 84.77 | 94.90 | 95.19 | 94.93 | 84.39 | 78.23 | 74.97 | 80.91 | |||||||||||||
1976 | 77.84 | 72.07 | a | 75.13 | 74.00 | 84.26 | 92.93 | 93.13 | 91.58 | 83.90 | 85.00 | 80.40 | 73.81 | 82.00 | ||||||||||||
1977 | 67.27 | a | 79.96 | a | 69.42 | 80.53 | 73.10 | 87.60 | 97.55 | 94.55 | 87.48 | a | 86.65 | 81.27 | 71.04 | c | 81.37 | |||||||||
1978 | 66.70 | a | 68.46 | 72.29 | 71.50 | 84.87 | 91.37 | 97.21 | b | 93.61 | 91.53 | 87.33 | a | 71.30 | 66.32 | 80.21 | ||||||||||
1979 | 61.84 | 67.11 | 69.94 | 77.07 | 81.45 | 92.07 | a | 96.39 | 92.69 | b | 99.07 | 81.87 | 74.87 | 73.90 | 80.69 | |||||||||||
1980 | 67.06 | 71.45 | 70.13 | 77.20 | 73.40 | a | 86.39 | b | 98.32 | 92.29 | 89.90 | 87.00 | 77.70 | 74.29 | 80.43 | |||||||||||
1981 | 70.90 | a | 73.89 | 68.65 | 78.23 | 80.39 | 96.83 | 96.29 | 98.65 | 92.10 | 78.61 | 76.07 | a | 72.58 | 81.93 | |||||||||||
1982 | 65.85 | d | 69.83 | e | 67.32 | f | 75.09 | h | 76.58 | g | 77.92 | f | 94.10 | a | 97.74 | d | 87.30 | g | 86.43 | a | 72.54 | b | 69.10 | a | 79.37 | e |
1983 | 72.24 | b | 70.96 | d | 69.41 | b | 70.36 | e | 84.50 | c | 84.04 | d | 94.81 | d | 97.54 | e | 95.16 | e | 85.86 | b | 73.89 | c | 70.29 | c | 80.76 | |
1984 | 75.59 | b | 76.68 | a | 80.07 | b | 80.54 | d | 93.64 | c | 90.29 | b | 101.04 | d | 98.59 | d | 99.08 | d | 81.48 | b | 72.20 | e | 64.04 | d | 84.44 | |
1985 | 66.41 | d | 71.31 | b | 71.38 | e | 83.88 | d | 81.54 | e | 95.56 | e | 100.96 | f | 98.89 | c | 85.92 | f | 86.72 | f | 72.00 | c | 73.44 | f | 80.12 | d |
1986 | 74.18 | c | 70.96 | b | 76.91 | h | 77.46 | f | 83.76 | f | 93.44 | e | 94.93 | d | 101.32 | c | 83.16 | e | 84.36 | c | 78.93 | b | 72.00 | c | 83.70 | c |
1987 | 69.38 | j | 71.67 | g | 73.61 | c | 87.56 | e | 85.04 | e | 91.92 | d | 90.89 | d | 97.19 | e | 95.19 | c | 86.77 | e | 75.88 | e | 63.12 | e | 84.72 | b |
1988 | 69.89 | c | 75.72 | d | 80.33 | g | 78.79 | f | 86.39 | h | 89.21 | f | 96.48 | d | 94.63 | a | 92.88 | f | 86.29 | c | 75.64 | h | 66.96 | h | 84.60 | g |
1989 | 67.61 | h | 70.05 | i | 77.91 | i | 85.40 | 84.03 | 90.17 | 99.00 | 94.13 | a | 95.70 | 85.65 | 79.41 | a | 76.27 | a | 87.75 | c | ||||||
1990 | 71.48 | 69.82 | 75.13 | 79.23 | 81.87 | 95.47 | 99.07 | a | 95.50 | a | 94.53 | 90.71 | 77.97 | 68.46 | c | 83.27 | ||||||||||
1991 | 68.68 | 75.79 | 64.81 | 75.50 | f | 82.45 | i | 82.96 | b | 90.67 | d | 93.78 | d | 95.04 | c | 89.55 | b | 80.96 | g | 68.54 | e | 81.09 | c | |||
1992 | 71.24 | f | 68.88 | e | 67.37 | d | 82.93 | c | 82.88 | f | 88.04 | c | 96.28 | b | 102.22 | d | 96.57 | 86.35 | 78.93 | a | 65.27 | a | 83.28 | b | ||
1993 | 64.35 | 65.78 | a | 77.65 | 84.83 | f | 85.67 | d | 90.77 | h | 89.69 | e | 94.48 | d | 95.73 | d | 83.96 | d | 74.22 | g | 69.62 | e | 80.77 | c | ||
1994 | 74.40 | f | 66.22 | e | 76.22 | h | 76.88 | f | 76.79 | g | 93.72 | e | 93.00 | c | 98.25 | c | 91.38 | d | 81.40 | a | 67.31 | a | 67.42 | 82.34 | d | |
1995 | 61.52 | 74.77 | f | 70.48 | f | 75.23 | 74.65 | 86.45 | a | 94.68 | f | 99.94 | 95.08 | f | 85.35 | 79.72 | a | 70.64 | f | 80.41 | e | |||||
1996 | 69.28 | b | 69.46 | a | 74.00 | f | 84.12 | d | 86.33 | a | 91.72 | a | 99.97 | a | 101.53 | a | 91.64 | b | 85.15 | e | 75.27 | d | 68.41 | d | 83.90 | a |
1997 | 67.25 | c | 72.36 | c | 81.86 | i | 79.25 | b | 89.57 | c | 86.40 | e | 93.00 | b | 96.04 | c | 94.00 | c | 81.80 | f | 71.68 | b | 66.29 | 81.58 | b | |
1998 | 66.50 | a | 61.86 | 69.77 | a | 72.71 | b | 71.04 | d | 78.36 | e | 95.96 | d | 102.15 | d | 86.61 | b | 81.97 | b | 74.07 | c | 71.55 | i | 78.27 | a | |
1999 | 71.62 | j | 70.14 | g | 69.48 | h | 73.88 | f | 79.67 | g | 86.27 | d | 93.55 | b | 95.28 | b | 89.04 | c | 90.81 | d | 76.45 | a | 72.67 | d | 86.29 | e |
2000 | 68.59 | b | 66.52 | f | 75.43 | c | 82.17 | f | 85.42 | e | 91.50 | d | 93.10 | b | 96.93 | d | 92.00 | f | 77.52 | f | 72.03 | 74.44 | d | 82.18 | d | |
2001 | 65.18 | c | 62.55 | f | 74.18 | c | 73.04 | g | 87.12 | f | 91.12 | f | 90.00 | h | 96.46 | e | 93.15 | c | 86.04 | g | 75.29 | f | 65.38 | e | 78.87 | g |
2002 | 68.20 | f | 75.44 | c | 72.55 | b | 75.16 | e | 82.18 | c | 89.14 | b | 95.20 | a | 92.67 | a | 95.44 | c | 77.57 | c | 77.39 | b | 65.83 | a | 81.69 | a |
2003 | 77.97 | a | 67.33 | a | 75.30 | a | 70.34 | a | 80.69 | b | 83.00 | c | 96.87 | a | 99.20 | a | 95.93 | a | 90.07 | a | 70.14 | b | 67.70 | d | 81.21 | |
2004 | 70.03 | b | 66.62 | c | 84.07 | d | 82.87 | g | 84.68 | c | 86.50 | d | 95.27 | a | 95.03 | b | 95.56 | e | 78.75 | c | 70.96 | b | 68.85 | d | 81.48 | a |
2005 | 68.09 | i | 67.04 | d | 73.52 | h | 79.33 | f | 85.19 | e | 86.77 | h | 99.52 | d | 98.04 | e | 91.23 | d | 84.83 | h | 79.87 | 73.85 | e | 84.96 | e | |
2006 | 70.89 | c | 76.64 | f | 67.39 | h | 72.12 | d | 86.12 | g | 95.52 | e | 103.38 | e | 98.50 | e | 97.15 | c | 84.60 | a | 81.93 | 71.40 | a | 86.17 | c | |
2007 | 67.07 | a | 70.50 | 79.52 | b | 78.20 | 84.00 | b | 90.83 | 97.00 | 97.90 | 89.77 | 84.07 | d | 78.00 | a | 65.03 | a | 81.82 | |||||||
2008 | 63.42 | 68.89 | a | 76.89 | c | 80.45 | a | 79.62 | b | 94.54 | d | 95.00 | 95.70 | a | 94.92 | f | 90.17 | h | 79.78 | c | 64.82 | c | 79.91 | b | ||
2009 | 72.10 | a | 66.08 | b | 71.67 | d | 75.96 | e | 84.52 | f | 80.25 | f | 97.12 | e | 95.92 | f | 97.68 | h | 81.21 | g | 77.96 | e | 64.88 | g | 76.81 | f |
2010 | 68.62 | g | 68.20 | h | 73.58 | g | 71.70 | g | 79.81 | j | 86.65 | j | 90.32 | i | 94.88 | e | 93.50 | h | 77.48 | h | 71.67 | f | 67.46 | g | 94.88 | k |
2011 | 70.80 | f | 64.43 | g | 71.71 | g | 76.11 | l | 78.40 | k | 81.95 | h | 93.50 | g | 96.86 | j | 93.76 | i | 88.64 | i | 71.21 | b | 68.00 | 69.61 | j | |
2012 | 73.23 | 70.66 | 72.23 | 78.80 | 85.29 | 89.03 | 94.42 | 99.94 | 98.03 | 85.84 | 76.07 | 64.77 | 82.36 | |||||||||||||
2013 | 67.77 | 69.79 | 77.77 | 80.67 | 84.90 | 89.23 | 94.10 | 95.32 | 94.10 | 82.97 | 76.17 | 71.16 | 82.00 | |||||||||||||
2014 | 77.42 | 74.07 | 76.94 | 81.43 | 86.74 | 89.03 | 94.94 | 94.65 | 95.50 | 88.87 | 78.07 | 67.97 | 83.80 | |||||||||||||
2015 | 73.42 | 77.50 | 82.29 | 79.13 | 76.58 | 92.20 | 92.23 | 97.97 | 95.63 | 90.35 | 75.40 | 68.48 | 83.43 | |||||||||||||
2016 | 68.16 | 81.38 | 77.29 | 80.70 | 79.58 | 94.30 | 97.84 | 97.48 | 93.10 | 85.35 | 80.70 | 67.94 | 83.65 | |||||||||||||
2017 | 64.03 | 67.57 | 80.10 | 82.17 | 84.26 | 93.60 | 98.29 | 97.55 | 90.63 | 90.19 | 79.87 | 76.35 | 83.72 | |||||||||||||
2018 | 75.84 | 73.07 | 70.58 | 81.13 | 78.90 | 90.43 | 100.87 | 96.77 | 94.17 | 84.42 | 77.50 | 69.94 | 82.80 | |||||||||||||
2019 | 67.84 | 60.86 | 69.81 | 79.17 | 73.77 | 86.37 | 94.74 | 97.84 | 92.10 | 86.77 | 78.87 | 65.77 | 79.49 | |||||||||||||
2020 | 71.48 | 74.76 | 66.97 | 76.00 | 86.81 | 88.33 | 95.26 | 99.71 | 99.10 | 89.90 | 78.97 | 73.52 | 83.40 | |||||||||||||
2021 | 71.23 | 73.29 | 71.58 | 80.57 | 82.16 | 92.73 | 97.97 | 96.71 | 93.00 | 82.48 | 82.20 | 65.61 | 82.46 | |||||||||||||
2022 | 72.74 | 74.61 | 78.48 | 80.17 | 83.35 | 95.40 | 96.58 | 100.29 | 96.27 | 86.10 | 72.10 | 65.52 | 83.47 | |||||||||||||
2023 | 63.16 | 65.93 | 65.23 | 79.53 | 76.39 | 79.47 | 99.48 | 97.32 | 85.33 | 88.16 | 78.13 | 72.26 | 79.20 | |||||||||||||
2024 | 69.32 | 66.31 | 69.45 | 76.33 | 77.86 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.35 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 68.27 | 70.30 | 72.67 | 77.33 | 81.13 | 88.14 | 95.39 | 95.93 | 92.34 | 84.57 | 75.54 | 68.84 | 80.75 | |||||||||||||
S.D. | 4.36 | 4.36 | 4.62 | 4.50 | 4.35 | 4.85 | 2.84 | 3.00 | 3.95 | 3.44 | 3.79 | 3.92 | 1.90 | |||||||||||||
SKEW | 0.19 | 0.13 | 0.16 | -0.29 | -0.01 | -0.34 | 0.28 | -0.15 | -0.48 | -0.18 | -0.20 | 0.10 | 0.07 | |||||||||||||
MAX | 77.97 | 81.38 | 84.07 | 87.56 | 93.64 | 96.83 | 103.38 | 102.22 | 99.10 | 90.81 | 82.20 | 76.35 | 84.44 | |||||||||||||
MIN | 59.84 | 60.86 | 62.13 | 64.53 | 71.04 | 77.87 | 89.69 | 87.90 | 83.16 | 76.84 | 66.83 | 59.61 | 76.57 | |||||||||||||
YRS | 66 | 66 | 62 | 62 | 61 | 66 | 70 | 73 | 66 | 66 | 70 | 69 | 48 |