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 | 72.92 | r | 77.50 | f | 85.88 | f | 93.65 | d | 88.07 | b | 91.91 | i | 88.65 | j | 74.59 | d | 65.20 | j | 43.37 | d | 74.92 | h |
1961 | 53.08 | g | 61.25 | d | 63.13 | h | 75.75 | j | 87.57 | j | 91.85 | d | 92.04 | e | 91.04 | g | 84.24 | e | 79.86 | i | 53.78 | l | 52.23 | e | 76.32 | g |
1962 | 51.71 | c | 64.20 | h | 60.33 | d | 77.78 | c | 89.65 | e | 90.34 | a | 88.84 | f | 95.00 | n | 76.53 | m | 74.90 | k | 64.86 | h | 58.26 | d | 71.35 | f |
1963 | 51.03 | a | 60.68 | c | 67.00 | c | 77.96 | b | 83.96 | e | 88.92 | d | 96.93 | d | 92.15 | d | 86.31 | a | 80.04 | g | 67.80 | e | 53.70 | d | 75.13 | a |
1964 | 51.30 | h | 48.19 | c | 62.56 | d | 74.44 | e | 84.63 | d | 92.33 | c | 96.75 | c | 94.07 | d | 85.96 | b | 80.10 | k | 64.16 | e | 54.32 | i | 78.12 | c |
1965 | 58.35 | e | 58.48 | c | 60.52 | b | 75.35 | d | 81.79 | b | 87.97 | 93.78 | h | 90.07 | a | 82.00 | c | 77.67 | d | 69.36 | e | 55.60 | k | 74.15 | b | |
1966 | 48.48 | d | 54.00 | b | 68.90 | 75.85 | c | 85.73 | e | 89.07 | b | 97.86 | b | 85.92 | f | 84.45 | h | 75.83 | h | 68.68 | e | 54.75 | g | 73.57 | d | |
1967 | 58.38 | e | 61.31 | b | 73.90 | b | 78.82 | b | 84.21 | b | 89.39 | b | 92.70 | a | 88.36 | c | 83.61 | b | 80.17 | a | 65.00 | g | 47.54 | e | 76.22 | a |
1968 | 52.69 | b | 58.25 | e | 61.44 | d | 70.11 | b | 81.00 | b | 94.71 | i | 88.54 | c | 87.93 | c | 85.73 | d | 80.30 | d | 61.41 | h | 55.48 | f | 74.00 | c |
1969 | 62.75 | g | 58.33 | d | 57.39 | c | 76.19 | d | 83.71 | 88.04 | c | 94.32 | f | 92.40 | a | 81.92 | d | 70.63 | d | 61.83 | a | 55.65 | h | 74.49 | c | |
1970 | 52.14 | b | 62.57 | e | 61.07 | a | 72.73 | d | 84.39 | 88.29 | b | 91.83 | b | 93.65 | n | 86.35 | d | 71.62 | b | 63.81 | n | 59.11 | m | 74.55 | c | |
1971 | 53.32 | c | 58.65 | b | 69.65 | 74.18 | b | 83.15 | d | 94.42 | d | 92.66 | b | 84.80 | k | 87.47 | o | 72.35 | e | 63.11 | b | 52.40 | f | 73.50 | c | |
1972 | 56.23 | e | 64.36 | a | 73.53 | a | 79.52 | a | 82.33 | v | 89.35 | j | 87.36 | i | 85.13 | 80.59 | c | 71.38 | b | 55.86 | p | ----- | z | 72.96 | e | |
1973 | 56.25 | o | 51.92 | b | 60.61 | c | 66.32 | b | 79.23 | e | 90.00 | h | 95.08 | s | 93.60 | k | 83.68 | h | 78.87 | a | 69.23 | d | 61.27 | e | 66.78 | e |
1974 | 56.14 | c | 60.79 | d | 74.12 | w | 75.15 | c | 85.79 | g | 93.21 | b | 92.55 | b | 85.54 | c | 77.55 | a | 69.37 | a | 59.57 | b | 48.85 | e | 71.87 | b |
1975 | 53.06 | 51.48 | e | 64.30 | a | 69.43 | 80.36 | c | 90.63 | c | 87.75 | o | 90.85 | e | 77.09 | h | 77.84 | f | 64.04 | c | 58.04 | c | 69.13 | c | ||
1976 | 48.11 | v | ----- | z | 70.00 | k | 74.41 | a | 79.90 | 89.38 | a | 87.04 | f | 89.63 | l | 83.08 | d | 70.85 | d | 58.46 | f | 56.16 | f | 79.53 | g | |
1977 | 49.50 | g | 57.25 | h | 63.06 | 72.13 | 82.60 | a | 94.67 | c | 93.63 | d | 88.93 | p | 86.57 | i | 75.25 | o | 68.18 | b | 60.96 | d | 76.46 | e | ||
1978 | 50.03 | b | 56.57 | u | ----- | z | 80.00 | u | 81.35 | h | 92.10 | 93.69 | b | 91.19 | o | 79.42 | f | 75.58 | 59.88 | f | 50.13 | a | 72.31 | g | ||
1979 | 37.75 | w | 49.20 | w | ----- | z | 73.50 | 80.13 | a | 84.52 | e | 93.96 | g | ----- | z | 85.04 | b | 81.21 | b | 56.83 | a | 59.79 | l | 76.87 | f | |
1980 | ----- | z | 54.94 | m | 65.29 | c | 70.71 | f | 79.46 | r | 97.55 | h | 97.93 | c | 90.63 | a | 82.15 | c | 72.41 | b | 59.41 | c | 60.14 | x | 77.97 | f |
1981 | ----- | z | ----- | z | 70.27 | p | 74.89 | k | ----- | z | ----- | z | ----- | z | 86.52 | f | 82.48 | a | 72.62 | e | 67.85 | j | 61.58 | e | 72.23 | i |
1982 | 55.74 | d | 57.09 | e | 65.72 | b | 73.15 | c | 80.38 | b | 89.35 | d | 92.96 | f | 91.00 | a | 83.92 | d | 71.30 | d | 56.67 | f | 45.65 | e | 71.33 | b |
1983 | 51.42 | 55.23 | b | 62.63 | a | 67.36 | b | 78.97 | a | 87.96 | b | 92.65 | 92.30 | a | 87.11 | b | 73.86 | b | 63.34 | a | 46.46 | c | 71.61 | |||
1984 | 51.97 | b | 60.31 | 62.38 | g | 72.44 | c | 84.27 | a | 86.58 | d | 91.40 | a | 84.97 | 82.11 | b | 66.03 | 57.86 | b | 49.67 | a | 71.60 | a | |||
1985 | 47.29 | c | 54.14 | 65.73 | e | 74.86 | b | 79.32 | c | 85.81 | d | 90.90 | a | 90.78 | d | 79.24 | e | 71.62 | b | 65.21 | b | 56.65 | e | 71.80 | ||
1986 | 60.57 | a | 57.69 | b | 69.86 | b | 76.67 | c | 80.54 | c | 84.33 | c | 90.79 | g | 86.31 | e | 80.80 | 68.47 | a | 57.45 | a | 48.10 | a | 70.07 | a | |
1987 | 50.50 | c | 53.38 | d | 60.89 | d | 71.64 | e | 77.23 | e | 84.54 | f | 91.07 | d | 87.45 | b | 80.76 | e | 76.62 | e | 59.58 | f | 50.22 | d | 69.98 | b |
1988 | 49.88 | f | 60.71 | a | 67.86 | j | 71.27 | h | 77.19 | e | 86.62 | d | 88.27 | e | 84.96 | c | 80.89 | c | 77.44 | f | 65.91 | g | 49.69 | e | 75.48 | e |
1989 | 57.12 | f | 51.44 | c | 72.90 | b | 77.79 | b | 86.03 | a | 89.36 | e | 89.67 | g | 86.78 | d | 81.33 | f | 76.57 | c | 67.04 | f | 52.32 | i | 77.27 | e |
1990 | 53.35 | e | 58.92 | d | 62.00 | a | 72.15 | d | 81.33 | d | 96.19 | c | 87.57 | h | 88.38 | g | 82.21 | f | 76.19 | e | 63.67 | i | 51.96 | c | 69.01 | d |
1991 | 50.81 | d | 60.48 | e | 66.14 | i | 73.65 | d | 84.46 | e | 87.71 | i | 83.77 | e | 84.62 | e | 75.19 | c | 76.92 | f | 60.91 | g | 48.40 | a | 70.17 | d |
1992 | 45.77 | 57.38 | e | 65.97 | b | 75.66 | a | 75.22 | d | 84.64 | h | 90.38 | e | 88.85 | e | 83.37 | c | 77.42 | g | 57.78 | c | 50.63 | d | 69.10 | b | |
1993 | 50.76 | b | 54.26 | a | 65.74 | 73.28 | e | 80.33 | g | 90.14 | b | 91.69 | e | 86.46 | c | 82.28 | e | 69.90 | j | 57.33 | 54.14 | b | 70.61 | b | ||
1994 | 56.22 | d | 59.15 | a | 63.88 | f | 73.50 | b | 80.33 | g | 94.32 | b | 93.96 | f | 91.74 | d | 83.30 | 72.00 | a | 60.96 | b | 54.53 | a | 71.75 | c | |
1995 | 53.33 | a | 63.50 | b | 62.89 | c | 72.71 | b | 79.45 | b | 87.42 | d | 92.88 | g | 91.20 | a | 82.77 | d | 77.71 | g | 70.75 | f | 55.56 | d | 72.09 | c |
1996 | 55.52 | f | 60.79 | e | 65.36 | i | 78.68 | h | 90.08 | e | 89.77 | d | 90.54 | g | 86.83 | m | 79.29 | f | 71.30 | d | 60.78 | g | 58.00 | j | 77.98 | h |
1997 | 42.59 | i | 50.09 | f | 67.75 | g | 65.36 | e | 78.00 | f | 87.39 | g | 90.92 | g | 88.80 | k | 83.81 | d | 73.23 | e | 62.71 | i | 46.08 | e | 67.12 | h |
1998 | 54.90 | a | 53.88 | b | 59.30 | k | 69.52 | e | 85.05 | l | ----- | z | 94.16 | f | 86.73 | e | 88.48 | e | 72.55 | b | 62.54 | f | 55.64 | f | 71.01 | f |
1999 | ----- | z | 65.04 | d | 66.36 | i | 69.71 | f | 75.70 | a | 85.71 | b | ----- | z | 91.46 | r | 80.81 | i | 76.31 | b | 69.70 | c | 51.68 | f | 74.49 | g |
2000 | 57.23 | a | 58.48 | b | 66.36 | c | 74.75 | b | 86.79 | b | 86.12 | d | 91.73 | a | 92.07 | d | 88.27 | 65.66 | b | 51.93 | c | 47.86 | b | 72.27 | ||
2001 | 45.35 | e | 57.63 | a | 59.32 | c | 74.56 | c | ----- | z | ----- | z | 93.57 | c | 88.73 | e | 84.43 | g | 75.70 | a | 61.00 | 53.33 | a | 67.69 | c | |
2002 | 57.48 | d | 55.79 | 62.60 | a | 76.21 | a | 84.46 | e | 92.52 | e | 89.88 | e | 90.52 | d | 79.81 | c | 66.08 | e | 60.22 | g | 48.79 | b | 73.10 | a | |
2003 | 59.31 | b | 54.19 | b | 64.57 | a | 74.04 | d | 84.56 | f | 85.73 | 94.77 | a | 91.00 | c | 84.00 | a | 75.14 | c | 60.97 | a | 55.42 | 72.65 | a | ||
2004 | 54.42 | 50.33 | b | 66.96 | c | 67.07 | c | 82.16 | 89.15 | d | 87.93 | b | ----- | z | 80.29 | b | 69.68 | i | 55.04 | g | 54.50 | g | 72.29 | d | ||
2005 | 56.39 | c | 53.64 | c | 61.00 | b | 70.27 | d | 75.73 | e | 90.50 | 93.15 | e | 84.35 | h | 88.26 | c | 75.10 | 67.11 | c | 56.57 | a | 71.61 | a | ||
2006 | 59.43 | a | 59.44 | a | 62.47 | a | 77.07 | a | 84.10 | 91.75 | b | 90.35 | 84.21 | b | 75.67 | 68.16 | 63.57 | 49.74 | 72.16 | |||||||
2007 | 40.23 | 58.81 | b | 64.65 | 65.59 | a | 74.12 | g | 84.30 | 86.58 | 89.13 | 82.20 | 76.00 | a | 62.50 | 50.26 | 69.11 | a | ||||||||
2008 | 49.06 | 59.66 | 63.83 | a | 72.50 | 78.23 | 90.23 | 83.29 | 84.19 | 77.40 | 69.17 | b | 60.77 | 51.62 | e | 70.00 | ||||||||||
2009 | ----- | z | 59.56 | a | 63.83 | b | 69.50 | 78.88 | e | 86.47 | 87.42 | 87.58 | 77.67 | 66.55 | 62.23 | 43.23 | 71.17 | a | ||||||||
2010 | 48.52 | 47.36 | 59.38 | b | 69.30 | 78.17 | a | 89.93 | 85.70 | a | 86.06 | 83.07 | ----- | z | 59.68 | e | 56.45 | 69.42 | a | |||||||
2011 | 53.58 | 51.39 | 70.71 | 77.20 | 79.10 | 93.93 | c | 93.45 | 94.13 | 81.70 | 71.74 | 60.07 | 39.29 | 72.19 | ||||||||||||
2012 | 56.29 | 52.11 | a | 69.30 | a | 76.60 | 81.93 | a | 93.60 | 90.06 | 90.48 | 81.86 | a | 72.10 | ----- | z | ----- | z | 76.43 | b | ||||||
2013 | 48.41 | d | ----- | z | ----- | z | 71.87 | 80.13 | ----- | z | 85.39 | 89.26 | 79.17 | 69.74 | 56.73 | 50.35 | 70.12 | c | ||||||||
2014 | 52.39 | ----- | z | 63.16 | 70.80 | 78.13 | 88.73 | 86.93 | d | ----- | z | 76.03 | 72.68 | ----- | z | 52.07 | c | 71.21 | c | |||||||
2015 | 47.03 | 56.46 | 63.42 | 69.70 | 73.84 | 86.07 | 88.52 | 88.97 | 85.83 | 69.26 | 58.93 | 52.39 | 70.03 | |||||||||||||
2016 | 49.65 | 60.62 | 66.21 | b | 69.93 | 75.84 | 90.20 | 96.21 | b | 85.74 | 81.10 | 78.52 | 60.27 | 54.74 | 72.42 | |||||||||||
2017 | 51.00 | 63.00 | 71.42 | 71.21 | b | 78.26 | 89.90 | 90.32 | 84.57 | a | 81.17 | 75.11 | v | 65.87 | g | 56.40 | u | 75.65 | c | |||||||
2018 | 59.18 | n | 61.14 | 67.55 | 75.60 | 86.61 | 94.08 | f | 92.13 | 90.00 | 82.07 | 68.69 | b | 59.00 | 52.90 | 73.57 | b | |||||||||
2019 | 53.42 | 54.00 | q | 63.05 | k | 73.77 | 78.61 | 88.70 | 93.40 | a | 93.77 | 84.50 | 66.61 | 60.73 | 54.39 | 74.79 | b | |||||||||
2020 | 54.48 | 55.82 | a | 66.29 | 74.70 | 86.71 | 92.53 | 94.32 | 93.94 | 82.43 | 74.87 | a | 66.69 | a | 55.16 | 74.83 | ||||||||||
2021 | 51.13 | 57.00 | 65.39 | 70.83 | 80.87 | 90.83 | 85.84 | 86.77 | 86.17 | 76.06 | 69.47 | 63.45 | 73.65 | |||||||||||||
2022 | 57.48 | 56.14 | 66.58 | 78.03 | 87.65 | 89.63 | 94.23 | 85.90 | 84.17 | 70.29 | 58.03 | 53.71 | 73.49 | |||||||||||||
2023 | 54.00 | 57.54 | 64.74 | 73.33 | 80.97 | ----- | z | 96.00 | e | 92.42 | 87.50 | 73.55 | 63.10 | 55.90 | 72.64 | a | ||||||||||
2024 | 50.68 | 57.86 | 61.35 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.63 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.73 | 57.31 | 64.89 | 73.18 | 81.44 | 89.66 | 91.26 | 88.90 | 82.58 | 72.80 | 62.17 | 52.20 | 72.22 | |||||||||||||
S.D. | 4.12 | 4.03 | 3.86 | 3.39 | 3.78 | 2.93 | 3.66 | 3.00 | 3.22 | 3.91 | 4.32 | 5.04 | 1.44 | |||||||||||||
SKEW | -0.44 | -0.42 | 0.53 | -0.40 | 0.25 | 0.11 | -0.23 | 0.06 | -0.28 | 0.13 | 0.16 | -0.03 | 0.03 | |||||||||||||
MAX | 60.57 | 65.04 | 73.90 | 79.52 | 90.08 | 96.19 | 97.93 | 94.13 | 88.48 | 81.21 | 69.70 | 63.45 | 74.83 | |||||||||||||
MIN | 40.23 | 47.36 | 57.39 | 65.36 | 73.84 | 84.30 | 83.29 | 84.19 | 75.19 | 65.66 | 51.93 | 39.29 | 70.00 | |||||||||||||
YRS | 48 | 53 | 48 | 56 | 50 | 50 | 45 | 45 | 51 | 49 | 39 | 46 | 11 |