YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 76.50 | m | 65.13 | o | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | 64.50 | y | ----- | z | 83.67 | v | 86.17 | a | 83.10 | 72.70 | a | ----- | z | ----- | z | 80.66 | i | |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | 67.83 | b | 76.60 | 86.17 | a | 82.55 | 81.69 | a | 71.03 | 62.14 | b | ----- | z | 75.43 | e | |||
1946 | ----- | z | 53.57 | g | 55.57 | c | 65.97 | 66.77 | 79.03 | a | 82.23 | 83.81 | 81.37 | 64.43 | a | 54.38 | a | 62.06 | 69.56 | b | ||||||
1947 | 57.84 | 58.75 | 58.28 | b | 66.37 | 74.24 | b | 75.93 | 86.33 | a | 82.10 | 83.20 | 70.07 | a | 55.22 | c | 55.04 | h | 69.85 | a | ||||||
1948 | 63.64 | i | 52.35 | c | 49.13 | a | 60.79 | a | 68.32 | f | 76.58 | d | 84.65 | 85.29 | 81.66 | a | 71.93 | b | 63.60 | e | 52.71 | 67.87 | b | |||
1949 | 38.96 | c | 45.45 | h | 51.90 | a | 65.59 | h | 64.65 | e | 78.81 | d | 83.74 | 83.65 | 83.97 | 68.71 | 69.12 | e | 53.00 | k | 69.28 | c | ||||
1950 | 50.35 | h | 59.29 | n | 59.85 | k | 67.17 | 65.42 | l | 78.03 | a | 83.35 | 86.40 | a | 77.00 | c | 77.77 | 68.94 | n | ----- | z | 78.29 | f | |||
1951 | 56.95 | k | 58.43 | u | ----- | z | ----- | z | 68.83 | b | 76.48 | e | 85.43 | a | 83.61 | 85.43 | b | 72.18 | c | 62.89 | k | ----- | z | 78.66 | f | |
1952 | 52.15 | k | ----- | z | ----- | z | ----- | z | 73.27 | t | 75.38 | f | 84.20 | a | 85.39 | 82.92 | f | 78.97 | 57.71 | i | 52.84 | 75.35 | h | |||
1953 | 59.38 | r | 57.00 | j | 58.83 | g | 57.50 | p | 60.18 | t | 77.23 | d | 85.84 | 84.00 | a | 84.03 | 71.06 | 63.72 | a | 58.10 | 74.86 | e | ||||
1954 | 53.87 | 61.87 | e | 48.19 | o | 68.50 | t | 75.95 | i | 76.93 | b | 84.65 | 81.13 | 81.79 | a | 74.30 | a | 67.27 | 57.13 | 70.99 | c | |||||
1955 | 46.94 | 52.00 | a | 60.00 | 62.93 | 68.92 | e | 76.66 | a | 81.29 | 83.74 | 82.59 | a | 76.26 | 61.63 | c | ----- | z | 68.45 | a | ||||||
1956 | 53.06 | n | 52.81 | h | 64.52 | 62.05 | k | 72.77 | i | 81.80 | 83.67 | a | 84.00 | b | 86.59 | c | 69.67 | a | 69.52 | g | 59.93 | d | 75.74 | e | ||
1957 | 47.52 | 59.54 | 57.57 | a | 65.04 | d | 62.20 | f | 84.55 | a | 87.70 | a | 83.90 | 81.50 | 66.63 | a | 57.87 | 65.64 | q | 69.18 | b | |||||
1958 | 57.96 | d | 55.53 | i | 50.29 | j | 61.54 | f | 76.52 | b | 80.42 | f | 85.30 | a | 86.97 | 84.30 | 77.39 | 65.62 | a | 68.83 | a | 75.36 | d | |||
1959 | 61.72 | f | 50.78 | a | 67.40 | p | 71.58 | d | 70.84 | 85.26 | g | 91.23 | 85.42 | 80.17 | a | 75.67 | a | 67.43 | 58.47 | a | 72.40 | c | ||||
1960 | 48.65 | 52.00 | 66.50 | a | 66.36 | b | 73.65 | 87.24 | a | 89.81 | 89.00 | 84.88 | f | 70.68 | 57.25 | n | 64.00 | i | 71.54 | c | ||||||
1961 | 62.52 | 64.81 | a | 60.13 | a | 69.93 | 68.13 | 84.27 | 88.67 | a | 83.68 | 77.87 | 70.84 | 58.00 | a | 53.71 | 70.21 | |||||||||
1962 | 55.36 | i | 56.75 | p | 51.16 | f | 72.17 | 65.76 | b | 79.07 | b | 86.44 | m | 87.30 | a | 83.17 | 70.88 | f | 63.43 | 58.07 | b | 72.71 | e | |||
1963 | 48.30 | a | 59.83 | d | 52.26 | d | 57.76 | m | 69.57 | a | 76.14 | p | 86.92 | e | 84.04 | g | 82.65 | d | 72.00 | c | 59.50 | b | 59.28 | f | 66.38 | d |
1964 | 52.34 | b | 54.52 | f | 52.46 | c | 58.14 | a | 66.60 | a | 77.07 | 87.00 | d | ----- | z | 81.29 | f | 78.39 | 58.30 | 55.03 | 65.04 | c | ||||
1965 | 56.68 | 55.86 | 53.43 | a | 57.53 | 67.42 | e | 72.30 | 83.87 | 84.06 | 75.97 | a | 79.03 | a | 58.45 | a | 51.71 | 66.36 | ||||||||
1966 | 52.23 | 50.33 | a | 61.87 | 68.30 | 73.71 | 80.73 | 85.61 | 88.16 | 78.89 | b | 72.90 | a | 62.39 | b | 56.14 | i | 70.47 | a | |||||||
1967 | 59.04 | h | 61.64 | f | 58.07 | d | 49.30 | g | 68.70 | h | 75.50 | d | 85.75 | c | 83.34 | b | 72.42 | d | 72.69 | e | 65.78 | c | 58.50 | u | 73.37 | e |
1968 | 55.05 | i | 58.58 | j | 59.35 | e | 62.00 | d | 70.84 | f | 80.67 | 84.45 | b | 80.20 | a | 82.28 | a | 73.37 | d | 60.12 | f | 54.64 | f | 74.62 | e | |
1969 | 52.12 | f | 47.00 | e | 54.50 | e | 63.35 | d | 71.17 | a | 75.83 | 84.16 | 89.90 | 82.56 | c | 68.10 | 59.28 | a | 56.26 | 68.37 | a | |||||
1970 | 54.61 | 56.82 | 55.61 | 58.80 | 73.55 | 81.23 | 86.97 | 85.77 | 80.60 | 69.74 | 63.07 | 49.58 | 68.03 | |||||||||||||
1971 | 55.68 | 54.61 | 62.57 | a | 60.60 | 63.29 | 77.33 | 86.61 | 85.71 | 81.50 | 66.00 | 59.20 | 44.77 | 66.49 | ||||||||||||
1972 | 55.87 | 59.24 | 68.52 | 64.76 | a | 71.29 | 78.47 | 88.77 | a | 84.26 | 77.47 | 62.87 | 54.93 | 49.90 | 68.03 | |||||||||||
1973 | 48.50 | a | 49.57 | 45.84 | 60.67 | 74.97 | 83.47 | 88.00 | 82.77 | 80.47 | 71.94 | 56.59 | a | 58.19 | 66.75 | |||||||||||
1974 | 49.27 | a | 57.08 | b | 57.00 | a | 63.53 | 72.52 | b | 84.86 | a | 84.07 | a | 84.06 | 82.50 | 69.42 | 62.07 | 52.84 | 68.27 | |||||||
1975 | 57.55 | 52.18 | 51.53 | a | 50.79 | a | 69.97 | 79.00 | 85.55 | 84.00 | a | 80.93 | 70.48 | 64.27 | 58.29 | 67.05 | ||||||||||
1976 | 58.68 | 55.03 | 55.63 | a | 59.20 | 72.52 | 79.27 | 83.94 | 80.74 | 74.07 | 69.23 | 64.86 | a | 58.61 | 67.65 | |||||||||||
1977 | 51.61 | 61.18 | 52.16 | 66.07 | 58.77 | 81.63 | 85.29 | 84.07 | a | 78.67 | 74.32 | 67.45 | a | 59.87 | a | 68.42 | ||||||||||
1978 | 50.81 | 51.56 | a | 57.00 | a | 56.83 | 71.30 | a | 81.10 | 86.77 | 83.71 | 77.67 | 74.32 | 56.80 | 49.63 | a | 66.46 | |||||||||
1979 | 45.61 | 52.07 | 52.74 | 64.00 | 69.74 | 82.70 | 86.03 | 80.87 | 84.57 | 70.73 | a | 60.00 | b | 58.87 | 67.33 | |||||||||||
1980 | 51.16 | 55.79 | 52.69 | b | 63.45 | a | 61.39 | 78.38 | a | 87.20 | a | 82.74 | 80.90 | a | 73.68 | 65.59 | a | 61.61 | 67.88 | |||||||
1981 | 55.81 | 59.00 | a | 53.68 | 66.59 | a | 71.32 | 86.54 | b | 87.23 | 88.71 | 81.60 | 67.00 | a | 63.03 | 61.84 | 70.19 | |||||||||
1982 | 51.97 | a | 55.64 | 52.69 | b | 62.50 | 71.20 | a | 76.33 | 83.94 | 84.39 | 77.36 | b | 69.42 | 55.43 | 52.50 | a | 66.11 | ||||||||
1983 | 55.97 | a | 54.14 | 52.28 | b | 54.30 | 71.29 | 76.73 | 85.03 | a | 81.31 | b | 80.59 | a | 69.55 | b | 58.59 | a | 55.26 | 66.25 | ||||||
1984 | 55.81 | 58.29 | a | 62.33 | a | 62.73 | 79.55 | 79.10 | 84.90 | 83.10 | 81.40 | 64.40 | a | 56.60 | 48.35 | 68.05 | ||||||||||
1985 | 50.73 | a | 55.61 | 54.35 | 66.97 | a | 70.17 | a | 81.13 | 83.86 | c | 83.71 | 70.34 | a | 67.29 | 54.23 | 56.55 | 66.25 | ||||||||
1986 | 61.65 | 54.25 | 58.55 | 61.33 | 71.30 | a | 79.62 | a | 79.07 | a | 84.13 | 68.57 | 65.19 | 60.60 | 53.19 | 66.45 | ||||||||||
1987 | 52.32 | c | 50.46 | 53.13 | 68.97 | 67.57 | a | 78.17 | 78.84 | 81.13 | 76.96 | e | 69.58 | 56.17 | 47.33 | a | 65.05 | |||||||||
1988 | 54.00 | 59.70 | b | 60.42 | 60.43 | b | 70.67 | a | 76.37 | 83.77 | 80.81 | 78.80 | 75.63 | a | 58.97 | 50.03 | 67.47 | |||||||||
1989 | 50.87 | 51.39 | 61.84 | 70.13 | 68.71 | 77.37 | 85.35 | 79.03 | 78.27 | 68.65 | 64.57 | 59.84 | 68.00 | |||||||||||||
1990 | 52.48 | 50.07 | a | 58.03 | a | 62.83 | a | 66.17 | b | 80.17 | 82.68 | 80.74 | 77.63 | 74.19 | 61.93 | 51.81 | 66.56 | |||||||||
1991 | 53.33 | a | 61.75 | 48.52 | 61.17 | 66.00 | b | 74.20 | 82.21 | b | 80.84 | 79.21 | a | 71.87 | a | 64.57 | 52.87 | a | 66.38 | |||||||
1992 | 53.76 | b | 53.34 | 50.63 | a | 68.03 | 72.29 | 75.03 | a | 80.90 | 82.21 | b | 79.93 | 70.00 | 58.07 | ----- | z | 67.66 | a | |||||||
1993 | 49.55 | 47.33 | a | 60.59 | b | 65.20 | 70.58 | 76.79 | a | 78.45 | 81.33 | a | 78.21 | a | 69.21 | b | 58.66 | a | 54.90 | 65.90 | ||||||
1994 | 56.40 | a | 49.81 | a | 58.47 | a | 61.30 | c | 67.39 | 82.13 | 83.60 | a | 86.32 | 79.50 | 66.73 | a | 54.23 | 53.61 | 66.63 | |||||||
1995 | 48.65 | 60.56 | a | 55.13 | a | 59.00 | 63.50 | a | 75.70 | 84.17 | a | 84.71 | 79.70 | 73.83 | a | 67.79 | a | 55.71 | 67.37 | |||||||
1996 | 55.58 | 54.69 | 58.77 | 66.77 | 71.10 | 79.89 | b | 85.03 | a | 86.17 | b | 77.50 | 68.48 | b | 60.63 | 54.87 | 68.29 | |||||||||
1997 | 50.59 | b | 53.75 | 65.03 | a | 61.13 | 76.68 | 74.67 | 81.87 | a | 85.00 | 79.07 | 69.93 | c | 58.93 | a | 51.61 | 67.35 | ||||||||
1998 | 54.97 | 46.30 | a | ----- | z | 54.82 | b | ----- | z | 72.45 | a | 85.27 | a | 87.03 | 77.07 | b | ----- | z | 60.57 | b | 55.83 | a | 66.03 | c | ||
1999 | ----- | z | 58.35 | b | 57.13 | a | 55.17 | a | 68.61 | 76.67 | 81.90 | 83.45 | b | 80.79 | a | 77.67 | a | 67.53 | 58.70 | a | 69.63 | a | ||||
2000 | 56.90 | 54.31 | 57.52 | 68.86 | a | 76.00 | 81.93 | 84.50 | a | 83.90 | a | 82.10 | a | 66.77 | a | 58.60 | 63.35 | 69.56 | ||||||||
2001 | 50.23 | a | 50.68 | 60.67 | a | 60.57 | 79.67 | a | 83.70 | 84.06 | 88.97 | a | 84.90 | 77.00 | b | 61.43 | 53.13 | 69.58 | ||||||||
2002 | 57.29 | 64.18 | 59.32 | 66.70 | 73.39 | 84.50 | 89.31 | b | 88.73 | a | 82.93 | 69.70 | a | 64.37 | 52.48 | 71.08 | ||||||||||
2003 | 65.71 | 53.19 | a | 60.84 | 59.10 | a | 73.48 | 81.34 | a | 89.76 | b | 86.87 | 86.10 | a | 79.48 | b | 57.59 | a | 55.00 | 70.71 | ||||||
2004 | 54.90 | a | 50.46 | a | 69.71 | 67.30 | 73.68 | 81.45 | a | 87.83 | g | 85.64 | c | 81.08 | d | 64.89 | c | 56.42 | d | 54.89 | d | 67.31 | a | |||
2005 | 51.63 | a | 49.39 | e | 56.73 | a | 64.56 | c | 72.28 | b | 77.50 | f | 87.86 | c | 85.83 | b | 79.86 | b | 71.68 | c | 66.29 | b | 58.86 | c | 67.72 | a |
2006 | 56.72 | b | 60.04 | a | 49.94 | 60.11 | c | 76.15 | e | 85.22 | c | 88.79 | b | 85.20 | f | 79.88 | f | 69.77 | e | 64.24 | i | 57.05 | i | 68.34 | d | |
2007 | 52.24 | f | 55.70 | a | 66.66 | b | 67.08 | d | 74.34 | b | 82.82 | b | 89.11 | c | 88.32 | c | 78.68 | e | 73.50 | e | 67.54 | d | 52.59 | d | 72.39 | a |
2008 | 51.11 | d | 55.93 | 61.82 | c | 67.75 | b | 68.13 | a | 84.76 | e | 87.03 | 86.42 | e | 82.27 | d | 76.48 | f | 65.07 | b | 52.11 | c | 69.31 | a | ||
2009 | 58.70 | a | 50.72 | c | 59.79 | c | 64.11 | c | 78.07 | d | 72.07 | c | 87.92 | e | 85.17 | a | 84.30 | c | 68.04 | c | 65.00 | d | 51.66 | b | 68.80 | |
2010 | 54.18 | c | 52.04 | a | 56.20 | a | 59.80 | 68.08 | e | 78.93 | b | 84.83 | b | 84.87 | 84.26 | c | 70.00 | e | 58.31 | a | 57.03 | b | 67.38 | |||
2011 | 57.86 | b | 50.65 | b | 59.04 | g | 66.95 | j | 66.19 | 77.10 | j | 84.26 | 87.45 | 82.14 | i | 73.26 | 58.27 | 50.58 | 66.07 | d | ||||||
2012 | 59.97 | a | 53.74 | b | 58.45 | 67.27 | 74.32 | 81.93 | 83.77 | 85.65 | 81.87 | 72.87 | 63.23 | 50.94 | 69.50 | |||||||||||
2013 | 53.00 | 53.00 | 62.71 | 67.87 | 72.55 | 84.00 | 85.94 | 86.13 | 79.63 | 67.29 | 61.13 | 55.35 | 69.05 | |||||||||||||
2014 | 63.74 | 59.61 | 63.81 | 66.57 | 73.10 | 82.13 | 85.71 | 82.81 | 82.23 | 76.23 | 62.63 | 54.26 | 71.07 | |||||||||||||
2015 | 59.94 | 63.07 | 65.84 | 66.23 | 61.55 | 81.40 | 79.13 | 85.16 | 80.13 | 69.23 | 56.03 | 50.71 | 68.20 | |||||||||||||
2016 | 51.32 | 64.31 | 59.48 | 62.27 | 65.52 | 83.40 | 86.26 | 84.74 | 76.93 | 70.35 | 62.50 | 53.03 | 68.34 | |||||||||||||
2017 | 46.61 | 52.11 | 63.81 | 66.40 | 70.45 | 83.47 | 87.03 | 84.84 | 75.83 | 74.07 | b | 65.67 | 61.62 | b | 69.33 | |||||||||||
2018 | 59.68 | 53.57 | 54.84 | 66.24 | a | 70.52 | 83.97 | 88.45 | 86.90 | 84.45 | a | 68.29 | 62.33 | 54.06 | 69.44 | |||||||||||
2019 | 53.61 | 45.05 | f | 55.39 | 65.63 | 60.94 | 80.87 | 86.16 | 87.65 | 78.11 | b | 72.06 | 62.57 | 50.65 | 68.51 | a | ||||||||||
2020 | 56.16 | 57.90 | 51.23 | 61.53 | 75.74 | 80.43 | 87.00 | 89.61 | 87.63 | 78.06 | 62.93 | 56.58 | 70.40 | |||||||||||||
2021 | 54.23 | 56.54 | 55.00 | 67.80 | 74.58 | 87.07 | 87.32 | 85.48 | 82.00 | 67.16 | 69.00 | 50.10 | 69.69 | |||||||||||||
2022 | 57.42 | 56.07 | 61.39 | 68.83 | 72.97 | 84.93 | 87.00 | 87.97 | 83.13 | 71.00 | 55.30 | 51.55 | 69.80 | |||||||||||||
2023 | 46.77 | 47.50 | 48.00 | 65.50 | 67.19 | 74.00 | 90.35 | 85.13 | 77.30 | 72.90 | 61.63 | 57.45 | 66.14 | |||||||||||||
2024 | 52.16 | 49.31 | 51.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.83 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 53.81 | 54.83 | 57.37 | 63.73 | 70.39 | 79.76 | 85.34 | 84.69 | 80.42 | 71.32 | 61.29 | 54.92 | 68.03 | |||||||||||||
S.D. | 4.70 | 4.53 | 5.18 | 4.34 | 4.37 | 3.67 | 2.64 | 2.42 | 3.45 | 3.81 | 4.00 | 4.29 | 1.55 | |||||||||||||
SKEW | -0.14 | 0.32 | 0.15 | -0.56 | -0.32 | -0.00 | -0.40 | 0.01 | -0.81 | 0.22 | 0.04 | 0.48 | 0.27 | |||||||||||||
MAX | 65.71 | 64.81 | 69.71 | 72.17 | 79.67 | 87.24 | 91.23 | 89.90 | 87.63 | 79.48 | 69.12 | 68.83 | 71.08 | |||||||||||||
MIN | 38.96 | 46.30 | 45.84 | 50.79 | 58.77 | 72.07 | 78.45 | 79.03 | 68.57 | 62.87 | 54.23 | 44.77 | 65.05 | |||||||||||||
YRS | 65 | 66 | 69 | 68 | 69 | 73 | 77 | 77 | 75 | 77 | 72 | 65 | 46 |