YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | 82.33 | j | 92.67 | 87.48 | 88.55 | b | 85.72 | a | 71.37 | a | 63.00 | a | 48.97 | 76.82 | e | |||
1961 | 52.55 | b | 56.56 | a | 61.97 | a | 72.25 | b | 81.87 | a | 90.00 | 90.74 | 87.43 | a | 78.68 | b | 73.43 | c | 53.79 | a | 51.63 | a | 70.91 | |||
1962 | 48.00 | 65.91 | q | 54.81 | 73.66 | a | 77.54 | c | 86.88 | f | 85.45 | 91.00 | c | 83.63 | c | 73.35 | 64.20 | 53.62 | b | 70.53 | b | |||||
1963 | 49.97 | a | 58.71 | 64.30 | a | 70.59 | a | 82.40 | a | 86.69 | a | 89.63 | a | 82.33 | a | 80.85 | c | 75.17 | a | 61.30 | 55.20 | a | 71.43 | |||
1964 | 50.74 | 52.36 | a | 56.16 | 67.50 | 79.52 | 85.90 | 88.37 | a | 87.13 | 81.44 | n | 72.90 | b | 62.17 | 52.68 | 68.67 | a | ||||||||
1965 | 55.50 | a | 54.32 | 58.87 | a | 70.41 | a | 77.76 | b | 81.18 | b | 86.90 | k | 84.62 | b | 75.17 | f | 75.29 | 65.30 | 51.19 | 67.44 | b | ||||
1966 | 48.55 | 47.58 | b | 64.42 | 71.03 | 81.35 | 85.91 | h | 92.94 | 86.32 | 80.10 | 72.16 | 64.72 | a | 54.90 | a | 69.46 | a | ||||||||
1967 | 55.07 | b | 58.96 | 67.43 | a | 70.59 | a | 77.67 | a | ----- | z | 87.77 | 82.84 | 78.54 | b | 75.23 | 64.10 | 48.00 | a | 69.65 | a | |||||
1968 | 52.00 | a | 57.24 | 58.58 | 65.07 | 78.13 | 89.20 | 84.66 | b | 80.33 | a | 80.50 | h | 78.00 | 58.52 | a | 52.84 | 68.60 | a | |||||||
1969 | 57.19 | 54.11 | 57.84 | 73.27 | 80.19 | 88.27 | 88.94 | 89.97 | 80.63 | 71.42 | 58.21 | a | 54.67 | a | 71.22 | |||||||||||
1970 | 53.65 | 58.29 | 59.55 | 66.23 | 80.68 | 87.17 | 86.74 | 86.33 | a | 80.07 | a | 67.52 | 64.67 | 57.58 | 70.71 | |||||||||||
1971 | 55.50 | i | 58.29 | 66.55 | 71.24 | a | 77.03 | 87.93 | a | 91.61 | 84.39 | 81.73 | 67.68 | 59.37 | 50.19 | 72.36 | a | |||||||||
1972 | 55.93 | a | 59.76 | 70.52 | 73.53 | 78.03 | a | 85.57 | 88.77 | 85.10 | 78.80 | 70.87 | 54.97 | 53.39 | 71.27 | |||||||||||
1973 | 48.39 | 51.43 | 57.68 | 64.20 | 78.52 | 86.53 | 86.13 | a | 90.06 | 83.83 | 75.90 | a | 64.33 | 55.42 | 70.20 | |||||||||||
1974 | 55.42 | 57.41 | a | 68.24 | f | 72.53 | 82.52 | 92.07 | 85.68 | 82.74 | 77.43 | 68.88 | e | 60.07 | 51.03 | a | 71.43 | a | ||||||||
1975 | 57.14 | i | 54.61 | 59.48 | 65.43 | 76.00 | 87.93 | 86.35 | 88.68 | 77.83 | 72.39 | 63.77 | 57.29 | 71.80 | a | |||||||||||
1976 | 53.73 | a | 59.90 | 61.19 | d | 73.30 | 78.48 | 88.87 | 86.06 | 86.13 | 79.52 | a | 70.37 | a | 61.61 | b | 53.29 | 71.04 | ||||||||
1977 | 49.67 | g | 58.36 | 59.03 | 65.20 | 76.70 | a | 91.03 | 88.50 | a | 82.70 | a | ----- | z | 75.07 | a | 67.40 | 57.26 | 72.12 | b | ||||||
1978 | 52.07 | a | 53.82 | 62.29 | 72.63 | 80.39 | 91.20 | e | 93.00 | 86.65 | 78.50 | 75.23 | 58.37 | 46.90 | b | 70.92 | ||||||||||
1979 | 46.00 | 55.12 | b | 61.69 | b | 70.48 | a | ----- | z | 84.57 | b | 89.08 | e | 82.52 | h | 85.14 | h | 78.42 | 55.90 | 56.66 | b | 66.43 | c | |||
1980 | 53.13 | a | 56.21 | 57.56 | d | 68.37 | 75.29 | g | 92.74 | c | 91.40 | a | 85.39 | c | 82.30 | 69.48 | 60.79 | a | 61.23 | a | 70.78 | a | ||||
1981 | 51.58 | 59.65 | b | 57.84 | 72.37 | 77.43 | a | 90.27 | 86.29 | 83.74 | d | 81.03 | 70.35 | 64.83 | 59.42 | 71.23 | ||||||||||
1982 | 53.32 | 54.70 | a | 60.48 | 69.30 | 76.57 | a | 87.40 | 87.61 | 85.75 | g | 80.93 | 71.87 | 55.87 | 48.48 | 67.87 | a | |||||||||
1983 | 52.55 | 54.68 | 57.37 | a | 61.17 | 75.81 | 85.64 | b | 88.20 | a | 86.19 | 82.73 | 69.16 | 57.60 | 51.48 | 68.55 | ||||||||||
1984 | 52.74 | 57.59 | b | 64.00 | 68.23 | 83.35 | 84.69 | a | 87.26 | 80.87 | 80.81 | c | 63.87 | a | 57.77 | 50.87 | 69.34 | |||||||||
1985 | 46.68 | 53.04 | 59.90 | 69.87 | 76.63 | a | 87.07 | 86.79 | b | 84.24 | b | 77.00 | 65.87 | a | 56.38 | a | 52.55 | 68.00 | ||||||||
1986 | 56.19 | 54.75 | 61.48 | 70.47 | 77.35 | 84.43 | 82.50 | a | 83.33 | a | 77.90 | 66.45 | 55.07 | a | 45.48 | 67.95 | ||||||||||
1987 | 49.65 | 51.46 | 58.25 | g | 69.59 | a | 74.83 | b | 85.57 | 85.50 | a | 82.50 | c | 77.28 | a | 72.94 | 56.60 | 48.32 | 68.57 | a | ||||||
1988 | 48.50 | a | 55.55 | 59.33 | a | 67.20 | 77.39 | 84.96 | b | 84.03 | 78.68 | i | 76.45 | a | 72.30 | a | 60.23 | 47.48 | 66.68 | a | ||||||
1989 | 49.60 | a | 55.04 | 65.58 | 76.07 | b | 80.21 | c | 87.77 | 86.42 | 80.37 | a | 76.79 | a | 66.90 | b | 56.97 | a | 47.81 | 69.13 | ||||||
1990 | 48.42 | 49.69 | b | 56.93 | a | 66.93 | 73.55 | 88.92 | d | 79.19 | d | 75.48 | 75.08 | e | 66.61 | 55.14 | b | 45.52 | 65.12 | |||||||
1991 | 45.39 | 52.32 | 53.29 | c | 65.52 | a | 74.47 | a | 80.53 | 79.66 | b | 78.73 | a | 72.53 | 69.07 | a | 53.50 | 44.55 | 64.13 | |||||||
1992 | 43.16 | 50.46 | a | 55.61 | 69.10 | a | 70.33 | a | 82.54 | b | 84.84 | 81.41 | b | 79.43 | b | 73.03 | b | 55.23 | 52.07 | a | 66.44 | |||||
1993 | 51.47 | a | 53.39 | 66.62 | j | 72.57 | i | 77.73 | a | 86.64 | b | 86.57 | a | 82.48 | d | 78.41 | a | 68.82 | c | 55.93 | a | 50.87 | a | 69.23 | b | |
1994 | 52.59 | d | 53.37 | a | 61.46 | c | 69.27 | 78.40 | a | 91.55 | a | 89.31 | b | 87.40 | a | 79.93 | 69.06 | 55.43 | b | 51.07 | b | 69.90 | ||||
1995 | 48.32 | 58.04 | c | 59.67 | a | 66.42 | d | 74.27 | e | 84.08 | d | 86.87 | 85.55 | b | 79.17 | a | 74.65 | e | 63.50 | h | 50.32 | i | 71.70 | b | ||
1996 | 53.24 | f | 58.76 | 61.29 | c | 71.82 | h | 82.90 | b | 88.21 | a | 81.75 | c | 76.06 | 66.52 | g | 61.19 | d | 52.18 | h | 48.52 | d | 69.83 | d | ||
1997 | 41.50 | c | 48.95 | i | 66.00 | m | 66.71 | b | 79.22 | d | 84.56 | c | 87.59 | d | 83.66 | b | 82.56 | c | 68.42 | e | 58.00 | 44.93 | b | 69.71 | b | |
1998 | 53.24 | b | 48.07 | 58.07 | d | 63.00 | e | 77.24 | f | 86.76 | a | 86.30 | a | 84.11 | d | 81.52 | a | 69.16 | f | 61.63 | 51.43 | a | 67.41 | b | ||
1999 | 55.29 | 59.41 | a | 63.90 | b | 67.04 | c | 78.47 | a | 84.69 | d | 81.92 | e | 82.72 | f | 79.46 | d | 72.07 | a | 65.61 | b | 50.36 | c | 68.93 | a | |
2000 | 55.93 | a | 58.59 | b | 61.33 | g | 73.69 | a | 83.57 | c | 86.22 | c | 88.46 | e | 84.31 | e | 83.20 | 65.79 | b | 51.04 | c | 56.27 | e | 71.55 | a | |
2001 | 45.87 | ----- | z | 59.55 | 69.25 | b | 79.94 | 86.89 | b | 86.31 | b | 81.39 | 80.21 | f | 72.97 | a | 58.72 | a | 51.27 | e | 69.22 | b | ||||
2002 | 51.31 | b | 54.60 | c | 60.83 | b | 75.39 | b | 79.81 | e | 91.11 | b | 86.16 | 87.28 | f | 78.70 | c | 67.06 | 58.82 | b | 46.90 | 68.25 | a | |||
2003 | 57.04 | c | 52.58 | b | 58.54 | e | 67.50 | b | 79.93 | c | 86.10 | 91.46 | c | 85.89 | d | 81.79 | f | 75.63 | a | 59.45 | a | 51.13 | a | 69.57 | a | |
2004 | ----- | z | 49.52 | 63.74 | d | 65.82 | b | 78.23 | 85.64 | b | 86.63 | a | 79.93 | b | 73.48 | e | 67.37 | d | 52.83 | a | 49.11 | c | 68.39 | a | ||
2005 | 52.17 | b | 49.14 | 57.00 | 67.50 | b | 78.39 | 85.48 | c | 89.37 | a | 82.32 | 81.12 | e | 69.69 | b | 63.62 | f | 55.62 | b | 69.80 | a | ||||
2006 | 54.71 | 58.08 | d | 59.55 | b | 72.29 | b | 80.89 | c | 88.26 | c | 84.39 | h | 79.03 | b | 72.77 | h | 67.10 | b | 61.55 | a | 51.11 | c | 67.26 | b | |
2007 | 44.07 | b | 53.96 | b | 64.71 | c | 69.39 | b | 75.77 | a | 87.72 | a | 86.77 | a | 83.83 | a | 78.15 | d | 72.46 | e | 62.43 | 49.13 | a | 69.03 | ||
2008 | 48.07 | a | 56.93 | a | 62.00 | a | 70.00 | 76.73 | a | 88.22 | c | 81.93 | b | 80.32 | c | 76.30 | c | 71.04 | f | 61.12 | d | 52.62 | b | 68.57 | a | |
2009 | 54.87 | 58.96 | b | 64.00 | b | 68.50 | b | 80.24 | b | 83.07 | c | 89.13 | h | 86.61 | 78.23 | d | 68.07 | d | 60.14 | a | 46.00 | d | 68.06 | a | ||
2010 | 46.71 | 50.77 | b | 58.41 | d | 67.90 | 75.08 | e | 86.13 | 83.67 | d | 83.39 | c | 80.96 | c | 68.48 | 57.29 | b | 55.54 | e | 67.86 | |||||
2011 | 50.63 | d | 53.04 | c | 66.40 | a | 72.10 | a | 74.66 | b | 88.76 | a | 83.97 | b | 87.52 | d | 81.44 | c | 71.89 | d | 56.72 | a | 46.07 | d | 69.43 | |
2012 | 54.48 | 53.70 | b | 63.14 | c | 73.93 | b | 78.90 | 90.11 | b | 84.41 | b | 85.14 | c | 79.75 | b | 73.90 | b | 63.57 | ----- | z | 72.82 | a | |||
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 71.73 | a | 59.84 | e | 53.45 | b | 61.67 | i |
2015 | 50.54 | c | 59.85 | b | 63.07 | d | 68.89 | b | 73.41 | b | 87.17 | a | 84.03 | 86.48 | b | 81.14 | b | 70.65 | 59.15 | d | 50.87 | h | 71.31 | a | ||
2016 | 48.27 | a | 60.72 | 65.16 | 69.59 | a | 75.85 | d | 88.80 | e | 89.44 | m | 82.62 | b | 79.37 | 75.71 | 60.33 | 54.97 | 69.22 | a | ||||||
2017 | 50.90 | 59.61 | 69.94 | 71.76 | a | 77.77 | 90.40 | 87.23 | 84.10 | 82.17 | 76.77 | 69.23 | 56.77 | a | 73.05 | |||||||||||
2018 | 58.00 | 58.50 | 64.10 | 75.50 | 82.55 | 91.07 | a | 88.00 | 87.06 | 82.52 | a | 66.52 | 58.40 | 50.81 | 71.92 | |||||||||||
2019 | 52.74 | 51.89 | 61.94 | 71.97 | 74.39 | 87.70 | 91.13 | 89.19 | 81.77 | 71.35 | 59.90 | 50.37 | a | 70.36 | ||||||||||||
2020 | 53.94 | 54.55 | 61.42 | 71.00 | b | 82.52 | 88.63 | 92.06 | 93.26 | 83.07 | 78.80 | a | 65.34 | a | 53.30 | a | 73.16 | |||||||||
2021 | 53.10 | 57.07 | 61.35 | 72.11 | b | 81.13 | a | 89.83 | 85.74 | 84.42 | 81.93 | a | 71.48 | b | 66.45 | a | 57.29 | 71.83 | ||||||||
2022 | 52.81 | 55.15 | a | 64.00 | 74.10 | a | 82.72 | b | 87.28 | a | 89.00 | b | 82.48 | 82.11 | b | 67.52 | b | 56.93 | a | 53.11 | c | 70.60 | ||||
2023 | 49.97 | a | 53.93 | a | 59.39 | 72.54 | b | 78.52 | 87.46 | b | 96.10 | 90.79 | b | 85.93 | b | 75.87 | 61.57 | 54.27 | a | 72.19 | ||||||
2024 | 50.39 | 56.69 | 59.45 | b | 70.26 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.51 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 51.31 | 55.27 | 61.12 | 69.77 | 78.36 | 87.42 | 87.07 | 84.47 | 79.97 | 71.14 | 59.82 | 51.84 | 69.89 | |||||||||||||
S.D. | 3.68 | 3.32 | 3.55 | 3.24 | 2.86 | 2.68 | 3.23 | 3.55 | 2.71 | 3.74 | 3.95 | 3.81 | 2.19 | |||||||||||||
SKEW | -0.49 | -0.37 | 0.40 | -0.29 | -0.20 | -0.17 | 0.06 | -0.07 | -0.33 | -0.10 | 0.15 | 0.10 | -0.92 | |||||||||||||
MAX | 58.00 | 60.72 | 70.52 | 76.07 | 83.57 | 92.74 | 96.10 | 93.26 | 85.93 | 78.80 | 69.23 | 61.23 | 73.16 | |||||||||||||
MIN | 41.50 | 47.58 | 53.29 | 61.17 | 70.33 | 80.53 | 79.19 | 75.48 | 72.53 | 61.19 | 51.04 | 44.55 | 64.13 | |||||||||||||
YRS | 57 | 59 | 57 | 59 | 58 | 59 | 58 | 57 | 53 | 61 | 60 | 60 | 28 |