YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1950 | ----- | z | ----- | z | ----- | z | 78.70 | t | 80.55 | 91.29 | b | 94.93 | b | 96.36 | f | 86.07 | a | 83.14 | b | 66.85 | c | 60.07 | a | 80.41 | e | |
1951 | 52.28 | b | 57.20 | c | 62.30 | a | 71.79 | b | 80.14 | c | 89.76 | a | 98.84 | 94.09 | i | 90.68 | b | 75.35 | h | 59.04 | c | 48.04 | d | 71.01 | b | |
1952 | 48.45 | b | 57.24 | d | 55.29 | c | 72.57 | b | 84.52 | f | 88.59 | h | 96.23 | r | 95.50 | u | 91.04 | b | 84.85 | e | 59.14 | b | 50.22 | h | 66.94 | e |
1953 | 58.96 | c | 53.83 | j | ----- | z | 71.86 | b | 73.19 | e | 91.25 | f | 97.11 | d | 94.67 | d | ----- | z | 65.75 | w | 66.38 | d | 51.19 | d | 73.34 | e |
1954 | 55.00 | i | 63.06 | k | 60.46 | e | 77.61 | g | 85.25 | g | 91.00 | l | 97.52 | h | 95.73 | p | 88.09 | h | 78.71 | j | 67.40 | e | 53.54 | c | 60.47 | i |
1955 | 46.10 | a | 51.09 | e | 64.10 | a | 70.29 | b | 81.00 | h | 90.03 | a | 96.27 | e | 93.39 | h | 90.34 | a | 80.12 | f | 62.54 | b | 57.37 | a | 69.79 | c |
1956 | 57.26 | 53.83 | 67.28 | b | 72.90 | 83.13 | a | 93.81 | d | 95.57 | a | 94.60 | a | 92.86 | b | 73.16 | l | 63.46 | f | 55.84 | 76.71 | b | ||||
1957 | 50.03 | 63.00 | 64.94 | 69.67 | 75.90 | 93.07 | 96.90 | a | 93.83 | b | 93.43 | p | 71.74 | 56.83 | 56.94 | 72.08 | a | |||||||||
1958 | 54.35 | 60.11 | a | 56.97 | 68.89 | b | 86.81 | 92.43 | 96.17 | b | 98.26 | 87.97 | 78.04 | h | 62.70 | 59.68 | 74.94 | a | ||||||||
1959 | 55.80 | a | 54.50 | 66.32 | 77.40 | 81.61 | 95.03 | ----- | z | 94.29 | 84.23 | 79.27 | e | 62.13 | 54.68 | 73.21 | a | |||||||||
1960 | 47.00 | 52.72 | 67.77 | 74.77 | 83.16 | 95.30 | 101.26 | 97.39 | 92.32 | b | 73.65 | 63.63 | 52.23 | a | 75.10 | |||||||||||
1961 | 56.48 | 60.71 | 63.55 | 74.00 | 82.86 | b | 96.90 | 99.58 | 95.77 | 84.33 | 75.65 | 58.37 | 49.84 | 74.84 | ||||||||||||
1962 | 51.16 | 56.14 | 59.83 | a | 79.93 | 80.94 | 92.13 | 98.77 | 97.97 | 92.73 | 80.26 | 68.17 | 56.97 | 76.25 | ||||||||||||
1963 | 47.74 | 64.11 | 63.87 | 69.07 | a | 87.33 | a | 88.80 | 97.68 | ----- | z | 89.67 | 80.13 | 63.43 | b | 54.58 | 73.31 | a | ||||||||
1964 | 50.94 | 56.10 | 60.32 | 68.50 | 79.61 | ----- | z | 99.26 | 94.84 | 87.03 | 83.29 | 57.97 | 52.48 | 71.85 | a | |||||||||||
1965 | 57.97 | b | 55.54 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 83.03 | 80.79 | c | 64.33 | 52.23 | 65.65 | f | ||||
1966 | 51.94 | 53.79 | 70.39 | 75.70 | 86.29 | c | 93.50 | 96.26 | 96.68 | 90.37 | 76.71 | 66.07 | 52.81 | 75.87 | ||||||||||||
1967 | 52.23 | a | 60.14 | 66.61 | 65.40 | 81.58 | 88.33 | 97.93 | a | 96.94 | 86.73 | 79.20 | a | 65.83 | 45.52 | 73.87 | ||||||||||
1968 | 52.35 | 63.52 | 67.03 | 70.70 | 82.73 | a | 92.73 | 95.90 | 90.19 | 89.14 | b | 78.29 | 63.43 | 49.29 | 74.61 | |||||||||||
1969 | 54.68 | 53.46 | 62.35 | 75.00 | 85.68 | 89.23 | 97.13 | 99.26 | 90.30 | 73.56 | d | 65.07 | 58.17 | m | 76.88 | a | ||||||||||
1970 | 54.10 | a | 63.50 | 62.00 | 68.13 | 84.68 | 92.30 | 96.77 | 96.03 | a | 87.13 | 76.29 | 66.08 | e | 52.35 | 74.95 | ||||||||||
1971 | 54.19 | 59.32 | 67.00 | 72.93 | 76.52 | 91.53 | 97.23 | a | 93.39 | 86.70 | 72.74 | 61.63 | 47.77 | 73.41 | ||||||||||||
1972 | 53.29 | 63.90 | 75.39 | 74.37 | 84.34 | b | 91.07 | 98.45 | 92.13 | 84.17 | 68.71 | 55.73 | 48.39 | 74.16 | ||||||||||||
1973 | 43.94 | 56.04 | 56.77 | 70.23 | 84.16 | 91.67 | 97.59 | d | 94.55 | 87.37 | 78.06 | 62.27 | 55.97 | 73.22 | ||||||||||||
1974 | 46.84 | 58.96 | 68.29 | 73.47 | 84.97 | 96.30 | 94.94 | 93.71 | 89.33 | 77.63 | a | 61.93 | a | 49.84 | 74.68 | |||||||||||
1975 | 51.65 | 55.64 | 59.61 | 65.67 | 79.40 | a | 90.20 | 95.42 | 92.87 | 86.73 | 74.58 | 61.20 | 56.06 | 72.42 | ||||||||||||
1976 | 57.10 | 60.79 | 64.32 | 71.67 | 84.40 | a | 91.20 | 95.94 | 92.35 | 84.50 | 74.26 | 64.80 | 56.45 | 74.81 | ||||||||||||
1977 | 52.16 | 64.25 | 62.13 | a | 77.43 | 74.26 | 92.87 | 96.40 | a | 95.43 | a | 87.07 | 78.19 | 65.23 | 58.57 | a | 75.33 | |||||||||
1978 | 53.03 | 57.68 | 67.05 | i | 70.93 | 82.16 | 95.73 | 99.61 | 96.77 | 87.93 | 82.55 | 59.90 | 47.87 | 75.83 | a | |||||||||||
1979 | 43.71 | 52.54 | 63.61 | 73.60 | 84.23 | 94.57 | 100.48 | 94.26 | 94.70 | 82.81 | 61.90 | 58.74 | 75.43 | |||||||||||||
1980 | 53.68 | 61.55 | 61.29 | 74.93 | 77.87 | 93.13 | 100.42 | 97.42 | 90.77 | 79.45 | 67.03 | 63.35 | 76.74 | |||||||||||||
1981 | 60.58 | 64.14 | 64.13 | 79.67 | 83.35 | 99.33 | 102.81 | 100.71 | 92.80 | 75.03 | 68.90 | 58.77 | 79.19 | |||||||||||||
1982 | 50.93 | a | 60.14 | 64.30 | a | 75.07 | 85.45 | 94.86 | a | 100.06 | 97.29 | 88.10 | 74.97 | 60.33 | 51.00 | 75.21 | ||||||||||
1983 | 55.87 | 57.82 | 63.40 | a | 67.40 | 82.84 | 94.67 | 97.29 | 94.81 | 91.10 | 77.68 | 61.97 | 54.42 | 74.94 | ||||||||||||
1984 | 54.77 | 60.41 | 68.23 | 73.68 | b | 91.00 | 93.53 | 99.16 | 96.03 | 91.87 | 70.94 | 63.00 | 51.50 | a | 76.18 | |||||||||||
1985 | 51.61 | 57.04 | 65.48 | 80.30 | 86.23 | 98.00 | a | 101.71 | 99.55 | 84.97 | a | 76.90 | 58.66 | a | 54.71 | 76.26 | ||||||||||
1986 | 61.03 | 60.36 | 70.55 | 73.90 | 85.52 | 96.87 | 96.03 | 98.35 | 82.52 | a | 74.81 | 64.93 | 54.71 | 76.63 | ||||||||||||
1987 | 50.30 | a | 57.37 | a | 62.87 | 81.24 | a | 85.39 | 98.10 | 96.61 | 96.87 | 92.23 | 81.67 | a | 61.10 | 50.55 | 76.19 | |||||||||
1988 | 52.86 | b | 63.97 | 67.43 | a | 75.79 | a | 85.43 | a | 96.43 | 101.74 | 96.52 | 89.47 | 85.61 | 65.03 | a | 53.55 | 77.82 | ||||||||
1989 | 50.13 | 57.21 | 73.96 | c | 83.57 | 85.39 | 95.07 | 101.90 | 94.58 | 90.60 | 77.87 | 67.53 | 57.61 | 77.95 | ||||||||||||
1990 | 54.42 | 57.43 | 69.74 | 79.32 | b | 83.45 | 96.57 | 99.35 | 94.55 | 89.70 | 79.35 | 62.83 | 48.30 | a | 76.25 | |||||||||||
1991 | 51.94 | 67.43 | 60.10 | b | 73.20 | 81.40 | a | 92.69 | a | 100.71 | 97.06 | 91.07 | 80.42 | 60.40 | 51.47 | a | 75.66 | |||||||||
1992 | 52.97 | b | 61.63 | b | 65.18 | c | 81.53 | 85.37 | a | 93.63 | 97.23 | a | 97.39 | 92.43 | 81.06 | 59.43 | 48.03 | 76.32 | ||||||||
1993 | 51.03 | 54.29 | 68.94 | 75.93 | 87.76 | b | 92.33 | 98.81 | 97.29 | 93.57 | 76.48 | b | 60.04 | b | 54.58 | 75.92 | ||||||||||
1994 | 58.24 | b | 55.44 | a | 72.53 | a | 74.93 | a | 85.43 | a | 98.90 | a | 101.17 | a | 99.65 | 92.33 | 75.42 | 56.97 | a | 55.07 | a | 77.17 | ||||
1995 | 51.58 | 68.43 | 64.74 | 71.31 | a | 79.70 | a | 90.93 | c | 100.00 | 100.97 | 93.03 | a | 80.03 | 69.72 | a | 58.81 | 77.44 | ||||||||
1996 | 57.68 | c | 64.14 | a | 71.28 | b | 79.52 | c | 88.45 | 99.07 | 101.71 | 101.32 | 90.93 | 76.84 | 63.37 | 55.07 | b | 79.11 | ||||||||
1997 | 52.52 | b | 59.00 | a | 74.52 | 73.38 | a | 90.81 | 94.34 | a | 99.03 | 97.68 | 89.83 | 77.26 | 65.67 | 52.26 | 77.19 | |||||||||
1998 | 56.42 | 55.11 | 66.10 | 70.40 | 82.48 | 89.97 | 99.90 | 99.48 | 87.40 | 75.10 | 62.70 | 55.30 | a | 75.03 | ||||||||||||
1999 | 59.43 | a | 62.64 | 73.13 | a | 69.57 | b | 84.70 | a | 93.87 | 96.23 | a | 97.19 | 90.97 | 84.53 | a | 70.93 | 55.96 | e | 78.26 | ||||||
2000 | 57.68 | 60.85 | b | 67.43 | a | 81.46 | b | 89.29 | 96.43 | 99.74 | 96.10 | 91.30 | 74.58 | 56.47 | 58.03 | 77.45 | ||||||||||
2001 | 54.06 | 58.65 | b | 68.17 | a | 73.97 | 89.37 | a | 100.07 | 102.26 | 100.40 | a | 95.10 | 81.87 | 66.80 | 50.52 | 78.44 | |||||||||
2002 | 53.84 | 62.64 | 66.45 | 80.07 | 85.81 | 97.70 | 102.32 | 99.03 | 89.21 | a | 75.10 | a | 63.63 | 53.90 | 77.48 | |||||||||||
2003 | 62.45 | 57.18 | 65.74 | 71.93 | 86.35 | 96.57 | 104.23 | 98.77 | 93.20 | 85.20 | a | 60.03 | 55.84 | 78.12 | ||||||||||||
2004 | 54.29 | 52.79 | 76.48 | 74.53 | 86.32 | 95.63 | 100.26 | 96.71 | 89.63 | 74.00 | 59.67 | 54.55 | 76.24 | |||||||||||||
2005 | 55.39 | 58.22 | a | 64.68 | 73.03 | 84.74 | 91.37 | 102.65 | 96.32 | 90.80 | 77.87 | 66.07 | 55.00 | 76.34 | ||||||||||||
2006 | 57.06 | 62.64 | 61.35 | 75.90 | ----- | z | 99.50 | 103.06 | 99.68 | 89.70 | 75.75 | c | 67.03 | 53.65 | 76.85 | a | ||||||||||
2007 | 52.03 | 63.54 | 73.58 | 78.97 | 89.68 | 99.97 | 104.19 | 101.45 | 92.27 | 79.71 | 70.13 | 49.84 | 79.61 | |||||||||||||
2008 | 50.97 | 57.86 | a | 68.45 | 75.73 | 83.83 | a | 97.90 | 102.19 | 100.87 | 94.73 | 81.45 | 67.17 | a | 49.63 | a | 77.57 | |||||||||
2009 | 55.87 | 58.89 | 68.06 | 76.03 | 92.53 | a | 93.34 | a | 105.42 | 101.13 | 94.83 | 74.13 | 67.10 | 47.83 | a | 77.93 | ||||||||||
2010 | 52.68 | 56.04 | c | 65.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.26 | 59.63 | 53.81 | 60.50 | f | |||||
2011 | 51.06 | 53.14 | 63.61 | 70.80 | 76.77 | 92.47 | 98.48 | 101.29 | 90.93 | 76.87 | 60.37 | 50.32 | 73.84 | |||||||||||||
2012 | 55.32 | 56.59 | 66.16 | 76.03 | 87.55 | 97.73 | 97.84 | 98.48 | 91.53 | 78.65 | 66.70 | 51.74 | 77.03 | |||||||||||||
2013 | 49.52 | 56.14 | 69.97 | 74.40 | 83.84 | 98.67 | 100.77 | 96.52 | 85.97 | 73.10 | 62.10 | 47.39 | 74.86 | |||||||||||||
2014 | 57.52 | 60.29 | 67.52 | 74.97 | 83.19 | 95.43 | 99.90 | 92.16 | 91.37 | 79.58 | 62.87 | 52.48 | 76.44 | |||||||||||||
2015 | 54.55 | 64.54 | 70.71 | 73.73 | 78.19 | 98.20 | 96.77 | 97.39 | 92.87 | 79.29 | 59.23 | 49.77 | 76.27 | |||||||||||||
2016 | 50.77 | 63.28 | 68.90 | 73.27 | 80.97 | 100.00 | 99.97 | 95.52 | 87.23 | 79.77 | 65.70 | 50.48 | 76.32 | |||||||||||||
2017 | 49.29 | 58.89 | a | 71.23 | 73.97 | 82.71 | 99.40 | 100.97 | 97.48 | 87.37 | 78.06 | 67.23 | 56.00 | 76.88 | ||||||||||||
2018 | 57.68 | 57.86 | 63.94 | 77.47 | 84.65 | 97.80 | 100.68 | 98.19 | 93.47 | 72.13 | 59.10 | a | 51.94 | 76.24 | ||||||||||||
2019 | 51.42 | 50.39 | 63.16 | 74.97 | 74.61 | 92.83 | 99.71 | 99.06 | 90.10 | 72.55 | 63.23 | 49.87 | 73.49 | |||||||||||||
2020 | 53.57 | c | 58.10 | 62.61 | 73.53 | 87.10 | 93.21 | a | 100.57 | c | 101.16 | 91.97 | 80.13 | 62.33 | 52.52 | 76.40 | ||||||||||
2021 | 53.45 | 58.68 | 63.16 | 76.67 | 85.68 | 98.64 | b | 98.48 | 98.94 | 91.48 | a | 72.06 | 66.43 | 52.77 | 76.37 | |||||||||||
2022 | 53.94 | 57.44 | a | 66.77 | 75.52 | a | 84.32 | 95.70 | 101.13 | 96.60 | a | 92.43 | 77.74 | 55.63 | 52.42 | 75.80 | ||||||||||
2023 | 49.42 | 53.39 | 56.29 | 73.10 | 84.84 | 90.10 | 104.06 | 93.23 | a | 85.47 | 77.45 | 62.13 | 56.68 | 73.85 | ||||||||||||
2024 | 51.33 | a | 58.07 | 63.97 | 73.13 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.79 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.27 | 58.72 | 65.78 | 74.17 | 83.69 | 94.57 | 99.27 | 96.93 | 89.76 | 77.65 | 63.11 | 53.30 | 76.10 | |||||||||||||
S.D. | 3.72 | 3.92 | 4.52 | 3.82 | 3.97 | 3.17 | 2.52 | 2.62 | 3.03 | 3.67 | 3.60 | 3.60 | 1.57 | |||||||||||||
SKEW | -0.08 | 0.16 | 0.09 | 0.13 | -0.51 | 0.03 | 0.24 | -0.18 | -0.45 | 0.08 | -0.06 | 0.20 | -0.02 | |||||||||||||
MAX | 62.45 | 68.43 | 76.48 | 83.57 | 92.53 | 100.07 | 105.42 | 101.45 | 95.10 | 85.61 | 70.93 | 63.35 | 79.61 | |||||||||||||
MIN | 43.71 | 50.39 | 55.29 | 65.40 | 73.19 | 88.33 | 94.93 | 90.19 | 82.52 | 68.71 | 55.63 | 45.52 | 72.42 | |||||||||||||
YRS | 73 | 72 | 71 | 70 | 68 | 68 | 69 | 66 | 70 | 68 | 73 | 72 | 57 |