YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 91.07 | p | 74.48 | f | 52.67 | f | 40.70 | a | 40.70 | k |
1957 | 42.10 | 48.11 | a | 60.27 | e | 65.40 | e | 71.93 | d | 87.85 | c | 91.17 | b | 88.42 | g | 84.29 | f | 67.23 | a | 48.79 | a | 46.41 | b | 62.93 | b | |
1958 | 43.46 | c | 54.74 | e | 53.44 | d | 66.24 | a | 82.37 | a | 91.46 | d | 96.24 | b | 97.88 | e | 85.50 | d | 74.60 | a | 56.03 | 50.00 | l | 72.91 | a | |
1959 | 45.74 | 50.52 | a | 61.00 | 72.45 | a | 81.17 | b | 94.68 | b | 98.19 | 89.54 | c | 82.07 | a | 70.14 | b | 56.41 | a | 43.42 | 70.44 | |||||
1960 | 39.93 | c | 43.25 | a | 60.90 | a | 71.03 | 78.13 | a | 91.50 | b | 96.39 | h | 95.75 | c | 86.38 | d | 68.90 | 57.97 | 43.03 | 66.98 | a | ||||
1961 | 46.93 | a | 54.42 | b | 57.13 | 67.50 | 78.07 | c | 93.31 | a | 95.00 | a | 90.97 | b | 76.69 | a | 69.47 | a | 53.17 | 38.41 | b | 68.42 | ||||
1962 | 40.84 | 51.26 | a | 54.81 | 73.59 | a | 77.43 | a | 88.53 | 92.79 | b | 93.52 | 85.08 | d | 74.25 | c | 61.07 | b | 45.17 | a | 69.86 | |||||
1963 | 29.52 | 55.76 | c | 57.54 | c | 67.76 | a | 83.43 | c | 86.14 | b | 94.41 | b | 87.31 | b | 86.15 | c | 76.82 | c | 58.54 | b | 44.00 | b | 68.95 | ||
1964 | 42.87 | 46.08 | d | 52.47 | a | 64.60 | 77.83 | h | 85.30 | 96.00 | b | 87.26 | l | 82.52 | a | 77.86 | b | 51.72 | a | 44.81 | d | 64.42 | b | |||
1965 | 46.70 | a | 48.32 | c | 54.07 | b | 65.47 | 72.79 | c | 81.84 | e | 88.52 | f | 88.62 | e | 75.50 | b | 73.57 | c | 59.14 | b | 45.37 | a | 64.67 | a | |
1966 | 41.13 | 43.52 | a | 62.03 | 69.18 | b | 81.46 | c | 87.54 | b | 93.40 | a | 92.81 | 84.03 | 69.83 | a | 58.71 | b | 43.52 | 68.93 | ||||||
1967 | 40.03 | 53.89 | 64.07 | a | 66.38 | a | 75.10 | a | 79.57 | b | 91.75 | c | 91.62 | b | 84.12 | e | 74.80 | a | 59.76 | a | 35.19 | 68.02 | ||||
1968 | 33.26 | 50.76 | 60.70 | a | 62.60 | 74.20 | a | 87.24 | a | 89.61 | 82.60 | a | 80.53 | 71.13 | 52.60 | 39.87 | 65.43 | |||||||||
1969 | 45.68 | 46.54 | 53.77 | 71.57 | 81.29 | 80.45 | a | 91.59 | b | 91.62 | b | 82.50 | 60.48 | 54.30 | 46.81 | 67.22 | ||||||||||
1970 | 44.03 | b | 57.08 | b | 52.29 | 61.17 | 79.00 | 83.77 | 91.48 | b | 91.74 | 79.77 | 64.10 | b | 57.20 | 45.77 | 67.28 | |||||||||
1971 | 45.35 | 49.48 | a | 60.17 | a | 67.86 | a | 75.20 | a | 89.33 | 97.03 | b | 92.77 | a | 78.78 | c | 66.19 | 51.97 | 39.81 | e | 67.83 | |||||
1972 | 47.16 | 56.04 | a | 68.07 | a | 70.48 | a | 79.03 | b | 86.47 | 95.20 | a | 89.68 | 80.60 | 63.84 | 49.03 | ----- | z | 71.42 | a | ||||||
1973 | 28.61 | 42.86 | 53.74 | 63.00 | ----- | z | 82.41 | a | 88.23 | a | 87.97 | 83.00 | g | 71.79 | c | 57.23 | 45.10 | 62.09 | b | |||||||
1974 | 32.29 | 38.96 | 63.73 | a | 65.83 | a | 81.74 | 90.33 | 90.23 | 90.10 | 84.48 | a | 70.97 | 55.20 | 42.65 | 67.21 | ||||||||||
1975 | 39.52 | 48.84 | c | 55.97 | 62.03 | 71.73 | a | 81.76 | a | 90.32 | 89.77 | a | 82.97 | a | 72.87 | a | 55.20 | 44.77 | 66.31 | |||||||
1976 | 41.94 | 54.69 | 57.32 | 68.86 | a | 76.52 | 86.53 | 93.19 | 87.77 | a | 82.00 | a | 70.03 | 63.68 | h | 48.29 | g | 71.89 | b | |||||||
1977 | 41.77 | 56.00 | a | 57.00 | 72.97 | a | 74.97 | 93.00 | b | 90.13 | 90.73 | a | 83.52 | a | 72.35 | 57.47 | 50.32 | 70.02 | ||||||||
1978 | 41.23 | 47.29 | 61.55 | 67.59 | a | 73.20 | a | 88.57 | 94.00 | 90.94 | 82.86 | a | 74.48 | b | 55.60 | 35.94 | 67.77 | |||||||||
1979 | 31.74 | 40.61 | 54.73 | a | 67.11 | c | ----- | z | 85.83 | 91.65 | 87.35 | 87.82 | b | 74.38 | b | 47.57 | 42.74 | 64.69 | a | |||||||
1980 | 43.61 | 52.79 | a | 54.13 | a | 67.28 | a | 70.37 | a | 87.83 | 91.83 | a | 89.13 | a | 83.64 | b | 69.06 | 57.83 | a | 53.74 | 68.44 | |||||
1981 | 52.55 | 54.50 | 57.58 | 74.27 | 74.81 | 91.77 | 91.03 | 87.87 | 83.55 | a | 66.19 | 59.83 | 47.29 | 70.10 | ||||||||||||
1982 | 43.55 | 48.57 | 58.43 | a | 68.13 | 75.10 | a | 84.31 | a | 90.60 | a | 87.16 | 77.72 | a | 66.17 | a | 52.00 | 43.84 | 66.30 | |||||||
1983 | 44.97 | 52.00 | a | 54.68 | 60.63 | 72.57 | a | 81.80 | 88.77 | a | 89.55 | 84.67 | 71.00 | 54.67 | 40.58 | 66.32 | ||||||||||
1984 | 37.35 | 47.45 | 56.93 | a | 64.00 | 81.90 | 82.93 | 92.00 | b | 91.10 | a | 84.12 | d | 61.71 | 56.14 | b | 44.68 | 66.69 | ||||||||
1985 | 43.17 | b | 45.63 | a | 57.90 | a | 70.10 | 79.86 | c | 90.97 | a | 94.35 | h | 93.73 | a | 77.96 | d | 69.59 | d | 52.62 | a | 45.38 | b | 66.08 | a | |
1986 | 49.43 | a | 54.61 | 63.81 | 65.39 | l | 76.14 | c | 91.15 | c | 89.58 | g | 92.83 | m | 75.59 | c | 66.23 | i | 54.33 | c | 46.73 | a | 63.97 | d | ||
1987 | 40.42 | 49.50 | b | 52.83 | h | 71.59 | c | 75.93 | a | 90.07 | b | 91.30 | h | 86.70 | k | 84.16 | e | 70.65 | k | 52.82 | b | 40.77 | 63.16 | d | ||
1988 | 35.50 | a | 49.04 | a | 57.93 | b | 68.21 | a | 77.72 | b | 90.69 | a | 94.00 | j | 90.77 | r | 82.62 | n | 76.35 | k | 56.11 | c | 42.48 | d | 59.71 | d |
1989 | 35.37 | a | 45.67 | a | 64.33 | a | 73.88 | d | 79.61 | h | 85.71 | m | 94.39 | m | 86.74 | l | 85.56 | u | ----- | z | 58.00 | h | 44.31 | e | 52.71 | g |
1990 | 44.43 | c | 51.19 | a | 61.59 | d | 70.32 | h | 76.47 | n | 94.16 | k | 93.70 | u | 95.00 | y | ----- | z | 66.50 | q | 53.20 | e | 35.56 | d | 49.19 | g |
1991 | 32.77 | a | 48.39 | 54.55 | 64.86 | a | 76.04 | c | 85.59 | h | 94.00 | n | 88.47 | n | 83.64 | s | 58.70 | u | 50.18 | b | 37.32 | 52.02 | e | |||
1992 | 34.94 | 49.93 | 59.90 | 75.40 | 78.03 | 85.29 | b | ----- | z | ----- | z | 86.29 | w | 70.33 | p | 48.93 | 39.23 | 58.96 | d | |||||||
1993 | 43.97 | a | 46.82 | 60.13 | 67.03 | 76.81 | 86.17 | 92.08 | g | 88.29 | j | 83.04 | g | 60.00 | l | 50.00 | b | 43.13 | 59.26 | d | ||||||
1994 | 46.10 | 46.22 | a | 63.23 | a | 66.79 | a | 79.83 | b | 92.39 | b | 95.43 | j | 93.42 | l | 83.61 | l | 64.83 | m | 51.47 | 44.90 | 61.37 | d | |||
1995 | 45.45 | 58.50 | 59.87 | 65.84 | e | 71.07 | b | 83.20 | 94.06 | m | 89.83 | s | 78.22 | u | 70.23 | r | 61.00 | b | 49.52 | 61.81 | d | |||||
1996 | 45.27 | a | 54.21 | 60.40 | a | 68.17 | 81.38 | b | 88.41 | a | 93.89 | l | 91.77 | a | 77.30 | j | 57.00 | o | 55.58 | f | 45.65 | 66.91 | d | |||
1997 | 42.61 | 48.50 | d | 64.23 | 61.03 | 77.48 | 87.30 | 91.03 | 88.50 | i | 80.50 | 68.05 | i | 55.61 | l | 40.77 | a | 65.94 | c | |||||||
1998 | 48.29 | 47.61 | 57.10 | a | 62.13 | 77.10 | 85.37 | 93.13 | 91.81 | 85.32 | b | 68.37 | d | 55.17 | 44.23 | 67.97 | ||||||||||
1999 | 49.45 | 53.96 | a | 65.87 | a | 62.97 | 74.23 | 85.24 | a | 90.86 | b | 85.48 | 80.57 | b | 75.48 | 64.37 | 47.29 | 69.65 | ||||||||
2000 | 47.65 | 54.07 | a | 58.61 | c | 75.04 | c | 83.64 | c | 89.74 | c | 94.74 | 90.37 | a | 83.69 | a | 68.50 | a | 47.63 | 45.87 | 69.96 | |||||
2001 | 42.74 | 50.79 | 60.32 | 70.11 | b | 81.83 | b | 92.22 | c | 92.80 | f | 89.57 | c | 87.70 | c | 73.24 | f | 59.07 | a | 42.43 | a | 67.68 | b | |||
2002 | 43.96 | c | 48.81 | a | 60.54 | c | 76.42 | d | 81.36 | c | 93.93 | b | 96.69 | b | 91.10 | b | 80.88 | e | 66.87 | 53.53 | 46.35 | 70.04 | ||||
2003 | 51.71 | 48.96 | 60.83 | a | 70.21 | a | 79.77 | 87.81 | c | 99.29 | c | 92.38 | b | 84.41 | c | 77.24 | b | 51.68 | b | 45.37 | a | 70.81 | ||||
2004 | 39.27 | a | 47.07 | 68.61 | 69.29 | b | 81.26 | 89.65 | d | 93.61 | 89.79 | b | 82.64 | e | 67.61 | c | 52.10 | a | 43.94 | 68.74 | ||||||
2005 | 50.16 | 51.00 | 59.20 | a | 68.73 | 79.27 | a | 83.72 | a | 96.94 | 87.48 | 81.86 | a | 68.90 | 56.13 | 44.77 | 69.01 | |||||||||
2006 | 46.97 | 51.82 | 57.10 | 73.00 | 82.48 | 92.70 | 93.52 | 88.83 | a | 76.93 | b | 65.03 | 55.60 | 43.45 | 68.95 | |||||||||||
2007 | 41.58 | 52.64 | 63.37 | a | 69.23 | 77.72 | b | 91.43 | 97.13 | 90.87 | 82.10 | 68.42 | 59.52 | a | 39.20 | a | 69.43 | |||||||||
2008 | 39.23 | 46.38 | 59.71 | 68.03 | 77.33 | a | 88.37 | 96.81 | 92.17 | a | 83.73 | 72.61 | 58.97 | 42.52 | 68.82 | |||||||||||
2009 | 45.10 | 53.21 | 63.97 | 68.40 | 82.52 | 85.21 | b | 96.19 | 92.42 | 84.33 | 65.74 | 58.43 | 34.87 | a | 69.20 | |||||||||||
2010 | 37.81 | 43.43 | 58.68 | 70.55 | a | 77.42 | 91.13 | 95.57 | a | 89.61 | 87.87 | 71.87 | 52.83 | 47.74 | 68.71 | |||||||||||
2011 | 39.83 | a | 47.11 | a | 62.52 | 67.27 | 74.48 | 90.10 | 92.26 | 95.30 | a | 84.20 | 69.58 | 54.37 | 41.39 | 68.20 | ||||||||||
2012 | 46.61 | 50.00 | 65.35 | 73.70 | 82.58 | 94.67 | 94.10 | 93.42 | 84.23 | 72.35 | 61.10 | 42.45 | 71.71 | |||||||||||||
2013 | 32.90 | 47.00 | 62.90 | 68.60 | 78.48 | 94.80 | 94.61 | 87.65 | 79.93 | 65.19 | 53.27 | 36.84 | 66.85 | |||||||||||||
2014 | 45.42 | 53.86 | 61.74 | 66.10 | 76.81 | 88.73 | 94.84 | 87.03 | 84.80 | 71.90 | 55.53 | 44.74 | 69.29 | |||||||||||||
2015 | 46.58 | 57.14 | 66.55 | 70.10 | 73.74 | 92.13 | 89.45 | 91.39 | 86.07 | 72.39 | 53.80 | 39.65 | 69.92 | |||||||||||||
2016 | 41.29 | 51.79 | 63.16 | 68.63 | 76.45 | 94.53 | 95.52 | 88.74 | 83.20 | 74.77 | 60.60 | 44.26 | 70.25 | |||||||||||||
2017 | 43.29 | 57.36 | 69.16 | 72.17 | 79.52 | 95.07 | 96.97 | 92.81 | 83.77 | 73.26 | 64.63 | 50.06 | 73.17 | |||||||||||||
2018 | 49.26 | 52.32 | 63.16 | 74.30 | 83.58 | 93.97 | 99.48 | 95.19 | 88.93 | 64.76 | b | 56.03 | 46.42 | 72.28 | ||||||||||||
2019 | 45.23 | 49.29 | 59.58 | 71.53 | 72.71 | 87.90 | 95.23 | 94.84 | 86.70 | 69.90 | 61.00 | a | 46.81 | 70.06 | ||||||||||||
2020 | 41.81 | 52.52 | 62.71 | 70.87 | 83.94 | 90.63 | 95.39 | 98.00 | 87.10 | 77.03 | 61.97 | 46.16 | 72.34 | |||||||||||||
2021 | 47.06 | 52.54 | 62.26 | 73.70 | 81.45 | 93.87 | 97.32 | 92.77 | 86.80 | 69.61 | 63.37 | 50.61 | 72.61 | |||||||||||||
2022 | 48.06 | 52.04 | 63.03 | 72.10 | 81.00 | 91.33 | 94.61 | 92.26 | 88.53 | 71.45 | 54.00 | 47.52 | 71.33 | |||||||||||||
2023 | 45.52 | 49.00 | 53.55 | 69.63 | 80.35 | 86.20 | 98.26 | 92.19 | 84.77 | 73.71 | 60.30 | 50.39 | 70.32 | |||||||||||||
2024 | 49.71 | 55.97 | 61.23 | 67.78 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.63 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 42.64 | 50.30 | 59.96 | 68.63 | 77.98 | 88.57 | 93.83 | 90.83 | 83.16 | 70.30 | 55.73 | 43.77 | 69.12 | |||||||||||||
S.D. | 5.32 | 4.18 | 4.04 | 3.82 | 3.57 | 3.98 | 2.84 | 2.93 | 3.20 | 4.00 | 4.08 | 3.93 | 1.81 | |||||||||||||
SKEW | -0.71 | -0.30 | 0.04 | -0.15 | -0.21 | -0.27 | 0.00 | 0.07 | -0.56 | -0.25 | 0.08 | -0.24 | 0.18 | |||||||||||||
MAX | 52.55 | 58.50 | 69.16 | 76.42 | 83.94 | 95.07 | 99.48 | 98.00 | 88.93 | 77.86 | 64.63 | 53.74 | 73.17 | |||||||||||||
MIN | 28.61 | 38.96 | 52.29 | 60.63 | 70.37 | 79.57 | 88.23 | 82.60 | 75.50 | 60.48 | 47.57 | 34.87 | 65.43 | |||||||||||||
YRS | 68 | 68 | 67 | 65 | 62 | 64 | 52 | 54 | 56 | 54 | 63 | 65 | 44 |