YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1967 | ----- | z | ----- | z | 67.43 | a | 69.73 | 81.16 | 90.50 | 100.32 | 98.87 | 88.83 | 78.94 | 62.73 | 39.39 | 77.79 | b | |||||||||
1968 | 41.16 | 57.21 | 64.68 | 68.80 | 82.42 | 96.33 | 98.84 | 91.65 | 87.73 | 74.55 | 57.27 | 43.32 | 72.00 | |||||||||||||
1969 | 49.90 | 51.29 | 58.90 | 75.73 | 86.45 | 91.23 | 99.58 | 100.13 | 90.27 | 69.65 | 57.37 | 50.06 | 73.38 | |||||||||||||
1970 | 49.13 | 58.64 | 60.13 | 69.45 | a | 86.68 | 93.90 | 101.29 | 99.58 | 87.07 | 69.94 | 59.27 | 48.39 | 73.62 | ||||||||||||
1971 | 47.68 | 54.00 | 63.55 | 73.47 | 81.42 | 94.80 | 102.00 | 97.13 | 86.93 | 69.19 | 53.83 | 43.19 | 72.27 | |||||||||||||
1972 | 49.06 | 58.28 | 72.19 | 75.07 | 84.84 | 93.77 | 101.65 | 96.58 | 86.93 | 68.81 | 51.67 | 42.06 | 73.41 | |||||||||||||
1973 | 33.94 | 47.89 | 56.35 | 68.63 | 83.68 | 91.90 | 99.13 | 97.65 | 85.80 | 75.94 | 60.40 | 49.32 | 70.89 | |||||||||||||
1974 | 36.58 | 47.18 | 67.45 | 70.30 | 86.58 | 98.83 | 96.87 | 96.26 | 86.93 | a | 72.65 | 56.28 | a | 45.80 | a | 71.81 | ||||||||||
1975 | 41.06 | 49.00 | c | 57.48 | 62.37 | 76.30 | a | 88.60 | 97.63 | a | 95.48 | 86.80 | 72.90 | 56.90 | 46.55 | 69.26 | ||||||||||
1976 | 44.97 | 56.52 | 57.86 | c | 70.66 | a | 81.71 | 92.59 | a | 99.48 | 94.90 | 85.03 | 71.77 | 59.97 | 48.00 | 71.95 | ||||||||||
1977 | 42.26 | 56.39 | 58.61 | 75.07 | 78.13 | 96.47 | 98.23 | 96.81 | 88.67 | 76.48 | 60.40 | 53.97 | 73.46 | |||||||||||||
1978 | 46.63 | d | 51.07 | 64.58 | 70.50 | 78.42 | 94.93 | 100.71 | 97.00 | 85.83 | 77.55 | 57.03 | 37.45 | 71.81 | ||||||||||||
1979 | 35.23 | 40.25 | 58.23 | 71.17 | 79.19 | e | 90.93 | 99.77 | 94.94 | 92.70 | 78.00 | c | 51.10 | 45.77 | 69.77 | |||||||||||
1980 | 46.23 | 54.17 | 57.57 | a | 68.72 | a | 77.03 | b | 93.64 | b | 100.61 | 96.48 | 87.31 | a | 72.39 | 60.48 | a | 54.77 | 72.45 | |||||||
1981 | 52.29 | 56.29 | 59.81 | 76.96 | b | 81.06 | 96.53 | 99.87 | 96.39 | 87.40 | 68.90 | 60.07 | 49.16 | 73.73 | ||||||||||||
1982 | 47.10 | a | 47.18 | 60.93 | d | 69.57 | 81.34 | b | 91.00 | c | 97.74 | 93.68 | 85.11 | b | 68.28 | b | 55.11 | c | 47.25 | c | 70.36 | |||||
1983 | 46.45 | b | 54.61 | 59.58 | 64.41 | c | 79.48 | b | 89.97 | a | 96.16 | 95.90 | 89.90 | 73.66 | b | 57.93 | b | 48.52 | d | 71.38 | ||||||
1984 | 44.58 | 50.63 | b | 61.37 | d | 67.93 | b | 89.84 | 91.17 | 98.28 | b | 95.75 | g | 88.65 | g | 66.46 | c | 59.04 | d | 46.79 | c | 67.61 | b | |||
1985 | 46.36 | c | 49.36 | c | 60.03 | b | 74.82 | b | 82.96 | d | 96.50 | b | 99.96 | c | 98.12 | e | 83.27 | d | 72.26 | d | 57.81 | c | 49.54 | c | 72.58 | |
1986 | 53.52 | h | 57.04 | c | 69.12 | f | 71.15 | d | 83.42 | e | 97.12 | f | 96.79 | b | 97.76 | b | 81.37 | k | 68.05 | j | 59.11 | k | 49.64 | f | 81.23 | g |
1987 | 44.00 | g | 51.61 | 57.76 | b | 76.27 | d | 82.33 | g | 96.68 | b | 97.92 | g | 94.21 | c | 89.03 | a | 76.08 | e | 55.56 | e | 44.52 | b | 71.30 | c | |
1988 | 42.26 | 54.55 | 63.10 | a | 72.48 | c | 82.97 | 96.93 | b | 102.52 | d | 97.12 | e | 86.57 | i | 81.10 | 61.68 | h | 48.91 | h | 77.00 | c | ||||
1989 | 41.26 | d | 47.54 | b | 69.08 | f | 82.85 | j | 86.32 | l | 95.26 | g | 102.14 | c | 94.40 | a | 90.11 | c | 76.97 | b | 61.33 | i | 51.00 | g | 75.40 | f |
1990 | 47.43 | j | 55.74 | a | 65.62 | e | 75.43 | i | 81.92 | g | ----- | z | ----- | z | ----- | z | ----- | z | 78.31 | b | 56.62 | a | 40.92 | f | 64.07 | h |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | 66.48 | b | 69.07 | a | 87.65 | e | 94.55 | a | 97.50 | a | 94.90 | a | 86.90 | a | 73.17 | b | 59.83 | 48.52 | 77.86 | b | ||
1998 | 52.13 | 52.79 | 62.00 | c | 68.39 | b | 81.77 | a | 89.61 | g | 99.67 | d | 96.79 | b | 85.50 | b | 70.27 | a | 58.62 | a | 46.29 | 70.38 | a | |||
1999 | 51.61 | 56.59 | a | 67.77 | 66.63 | 79.29 | 90.87 | 96.69 | b | 92.13 | 84.60 | 77.07 | a | 63.07 | a | 49.27 | a | 72.97 | ||||||||
2000 | 51.93 | b | 55.21 | 59.52 | b | 77.00 | 87.23 | 94.83 | 100.23 | 98.35 | 88.23 | 72.13 | 49.45 | a | 49.74 | 73.65 | ||||||||||
2001 | 45.10 | a | 51.61 | 62.84 | 71.60 | 86.10 | a | 94.30 | 100.80 | u | 94.73 | a | 91.37 | 77.77 | 61.97 | 44.84 | 71.11 | a | ||||||||
2002 | 46.81 | 51.21 | 60.35 | 77.00 | 83.23 | a | 97.60 | 102.10 | 97.16 | 85.24 | a | 70.77 | 57.83 | 47.39 | 73.06 | |||||||||||
2003 | 51.93 | b | 51.79 | 61.71 | 71.04 | e | 83.90 | a | 93.54 | b | 103.87 | a | 97.50 | g | 88.00 | 78.84 | 55.77 | 47.81 | 71.65 | a | ||||||
2004 | 44.03 | b | 47.93 | 70.06 | 71.59 | a | 83.14 | b | 94.57 | 98.52 | 95.55 | 86.32 | b | 71.36 | c | 53.47 | 46.42 | 71.91 | ||||||||
2005 | 51.94 | 52.32 | 61.71 | 70.57 | 83.83 | b | 90.36 | b | 102.83 | a | 92.96 | f | 87.53 | 74.03 | 59.79 | a | 48.70 | a | 71.24 | a | ||||||
2006 | 49.68 | 54.46 | 59.55 | 74.17 | 86.71 | 97.76 | a | 100.65 | 95.18 | c | 82.33 | 68.59 | b | 58.48 | a | 46.06 | 72.80 | |||||||||
2007 | 43.74 | 55.04 | 64.57 | a | 72.45 | a | 84.18 | c | 96.20 | 101.52 | 98.41 | d | 90.15 | d | 72.38 | b | 61.90 | a | 44.39 | 73.74 | ||||||
2008 | 43.23 | 51.20 | d | 63.00 | c | 69.56 | c | 78.52 | b | 93.21 | b | 99.26 | d | 98.00 | c | 88.67 | c | 74.86 | c | 60.93 | a | 46.75 | g | 74.58 | a | |
2009 | 47.97 | b | 54.46 | d | 64.70 | d | 69.50 | 85.93 | b | 88.28 | a | 100.68 | 97.71 | c | 88.83 | a | 69.90 | 60.47 | 41.00 | a | 72.45 | |||||
2010 | 41.58 | 47.81 | a | 59.70 | a | 70.18 | b | 77.63 | a | 94.00 | a | 99.00 | b | 92.67 | a | 90.53 | 73.50 | g | 57.17 | a | 49.97 | 70.93 | a | |||
2011 | 42.86 | b | 49.30 | a | 63.52 | 70.14 | a | 77.32 | 93.48 | c | 99.13 | 99.71 | c | 87.66 | a | 73.65 | 57.87 | 44.37 | a | 71.58 | ||||||
2012 | 49.77 | 52.62 | 64.84 | 74.87 | 85.94 | 98.20 | 97.68 | 98.35 | 88.86 | a | 75.79 | b | 62.93 | 47.16 | 74.75 | |||||||||||
2013 | 40.06 | 49.71 | 64.63 | a | 71.44 | c | 82.16 | 97.70 | 100.29 | 94.58 | 85.97 | 70.52 | 56.23 | 39.61 | 71.08 | |||||||||||
2014 | 49.26 | 57.89 | 64.42 | 71.50 | 80.39 | 94.61 | b | 100.13 | 91.71 | 89.40 | 76.83 | a | 59.24 | a | 48.94 | 73.69 | ||||||||||
2015 | 41.10 | 58.07 | 66.50 | a | 72.53 | 76.97 | 94.33 | 95.16 | 94.97 | 90.80 | 75.65 | 56.17 | 44.87 | 72.26 | ||||||||||||
2016 | 44.23 | 52.43 | a | 66.52 | 70.80 | 78.42 | 98.93 | 101.77 | 95.13 | 86.73 | 77.35 | 63.97 | 48.35 | 73.72 | ||||||||||||
2017 | 46.35 | 58.69 | b | 69.42 | 70.93 | 80.97 | 98.73 | 100.90 | 97.19 | 88.30 | 74.26 | 65.33 | 52.58 | 75.31 | ||||||||||||
2018 | 51.17 | a | 54.85 | a | 62.71 | c | 77.93 | c | 86.40 | a | 98.63 | 103.00 | 98.97 | 93.63 | 66.90 | 56.50 | 45.90 | 74.72 | ||||||||
2019 | 44.42 | 47.32 | 61.97 | 74.33 | 74.03 | 92.57 | 100.97 | 100.65 | 91.90 | 70.68 | 58.83 | 45.32 | 71.92 | |||||||||||||
2020 | 41.58 | 52.55 | 63.48 | 73.17 | 87.42 | 95.40 | 101.26 | 103.74 | 90.37 | 80.06 | 60.93 | 45.55 | 74.63 | |||||||||||||
2021 | 46.29 | 55.25 | 62.52 | 75.07 | 85.48 | 100.27 | 102.68 | 98.39 | 91.60 | 70.68 | c | 65.92 | f | 50.79 | g | 78.82 | b | |||||||||
2022 | 49.84 | l | 53.39 | j | 66.73 | e | 74.93 | 83.42 | 96.27 | 100.73 | a | 97.77 | 93.17 | a | 75.58 | 53.93 | 47.84 | 79.04 | b | |||||||
2023 | 45.90 | 46.32 | 55.13 | 70.97 | 85.58 | 91.17 | 104.48 | 97.52 | 88.63 | 78.13 | 60.63 | 50.39 | 72.90 | |||||||||||||
2024 | 49.81 | 55.34 | 62.94 | 69.36 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.03 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 45.62 | 52.64 | 62.65 | 71.64 | 82.47 | 94.42 | 100.01 | 96.62 | 88.15 | 73.63 | 58.26 | 46.78 | 72.61 | |||||||||||||
S.D. | 4.51 | 3.96 | 3.73 | 3.24 | 3.62 | 2.96 | 2.06 | 2.39 | 2.50 | 3.68 | 3.33 | 3.52 | 1.39 | |||||||||||||
SKEW | -0.51 | -0.60 | 0.28 | -0.25 | -0.22 | -0.12 | -0.16 | 0.15 | 0.11 | 0.01 | -0.40 | -0.37 | -0.32 | |||||||||||||
MAX | 52.29 | 58.69 | 72.19 | 77.93 | 89.84 | 100.27 | 104.48 | 103.74 | 93.63 | 81.10 | 65.33 | 54.77 | 75.31 | |||||||||||||
MIN | 33.94 | 40.25 | 55.13 | 62.37 | 74.03 | 88.28 | 95.16 | 91.65 | 82.33 | 66.46 | 49.45 | 37.45 | 69.26 | |||||||||||||
YRS | 46 | 49 | 50 | 49 | 48 | 47 | 48 | 47 | 47 | 49 | 47 | 45 | 35 |