YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 44.61 | 47.76 | 47.34 | 60.85 | 74.95 | 76.40 | ----- | z | 86.74 | 79.53 | 71.19 | 52.08 | 47.95 | 62.67 | a | |||||||||||
1953 | 51.34 | 49.34 | 54.75 | a | 59.13 | 63.44 | 76.23 | 88.03 | a | 83.29 | c | 79.88 | f | 66.27 | 56.75 | 47.03 | 63.24 | a | ||||||||
1954 | 48.71 | 56.66 | 53.18 | a | 64.78 | 72.74 | 76.98 | 88.19 | 82.50 | a | 78.83 | a | 69.48 | a | 60.80 | 49.35 | 66.85 | |||||||||
1955 | 44.81 | 46.26 | a | 54.63 | 59.84 | a | 68.15 | a | 76.57 | 80.95 | 83.68 | 77.30 | 71.87 | 56.50 | 49.50 | 64.17 | ||||||||||
1956 | 50.90 | a | 46.91 | 58.21 | 62.05 | 71.79 | 80.20 | 84.92 | 81.53 | 81.65 | 66.30 | a | 55.72 | 51.27 | a | 65.95 | ||||||||||
1957 | 48.29 | 56.50 | 56.11 | 60.98 | a | 65.32 | 82.95 | 87.38 | a | 84.03 | 77.47 | 64.12 | a | 51.12 | a | 50.33 | b | 65.38 | ||||||||
1958 | 50.35 | 52.96 | 50.50 | b | 59.77 | 75.79 | 80.83 | 86.07 | a | 87.03 | 81.71 | b | 72.28 | a | 60.42 | d | 54.06 | 67.65 | ||||||||
1959 | 50.63 | a | 49.79 | 58.82 | a | 67.27 | 70.38 | a | 83.80 | 89.98 | 83.65 | 74.70 | 68.45 | 56.48 | 50.65 | 67.05 | ||||||||||
1960 | 42.48 | 46.13 | b | 58.71 | 64.27 | 70.02 | 83.50 | 87.69 | 86.60 | 80.92 | 67.13 | 55.55 | 48.67 | a | 65.97 | |||||||||||
1961 | 51.47 | 53.43 | 55.32 | 64.62 | 69.97 | 83.43 | 88.31 | 86.45 | 75.64 | a | 66.74 | 53.63 | 48.63 | 66.47 | ||||||||||||
1962 | 48.40 | 51.14 | 50.93 | a | 68.43 | 67.55 | 79.00 | 85.76 | 86.61 | d | 80.92 | 68.13 | 60.07 | 52.81 | 66.65 | |||||||||||
1963 | 45.66 | 57.39 | 54.92 | 60.22 | 73.48 | 76.97 | 87.60 | 85.20 | a | 80.62 | 69.94 | 56.95 | a | 49.79 | 66.56 | |||||||||||
1964 | 44.85 | 47.48 | 52.98 | a | 61.67 | 68.97 | 78.45 | 87.77 | 84.10 | 77.22 | 72.66 | 52.42 | 48.87 | 64.79 | ||||||||||||
1965 | 51.29 | 51.43 | 52.97 | 60.63 | 67.00 | 74.60 | 86.34 | 84.63 | 74.90 | 71.60 | 58.73 | 49.65 | 65.31 | |||||||||||||
1966 | 46.06 | 47.44 | a | 58.21 | 64.77 | 74.26 | 79.95 | 86.81 | 87.60 | 80.33 | 67.23 | 57.62 | 49.73 | 66.67 | ||||||||||||
1967 | 49.92 | 54.32 | 58.03 | 56.38 | 71.13 | 77.30 | 88.44 | 85.83 | a | 78.18 | 69.84 | 59.47 | a | 45.32 | 66.18 | |||||||||||
1968 | 49.90 | 57.33 | 58.06 | 61.53 | 71.31 | 80.47 | 83.84 | 81.35 | 78.52 | 68.74 | 57.95 | 47.44 | 66.37 | |||||||||||||
1969 | 53.47 | a | 49.57 | 54.97 | 63.88 | 75.26 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 59.43 | g | ||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1975 | ----- | z | ----- | z | ----- | z | ----- | z | 69.97 | 79.78 | 88.83 | g | 83.92 | f | 80.97 | 66.40 | 56.48 | 50.95 | 67.43 | f | ||||||
1976 | 49.97 | 53.62 | 54.50 | 58.78 | 72.19 | 78.83 | a | 87.34 | 82.89 | 76.82 | 65.89 | 57.90 | 49.61 | 65.69 | ||||||||||||
1977 | 47.87 | 54.57 | 51.47 | 63.93 | 65.32 | 82.33 | 87.31 | 87.38 | a | 78.60 | 71.18 | 58.82 | 53.82 | 66.88 | ||||||||||||
1978 | 49.15 | 51.39 | a | 59.11 | 59.78 | 69.89 | 80.55 | 87.52 | 84.65 | 78.90 | 72.45 | 54.70 | 45.11 | 66.10 | ||||||||||||
1979 | 42.57 | b | 48.39 | 54.45 | 60.22 | 69.58 | 79.42 | 85.77 | 81.82 | 81.68 | 68.84 | 53.38 | 51.52 | 64.80 | ||||||||||||
1980 | 51.42 | 54.72 | 53.32 | 61.33 | 66.39 | 76.73 | 87.77 | 85.35 | 79.12 | 67.31 | 57.22 | 54.85 | 66.30 | |||||||||||||
1981 | 52.47 | 53.30 | 54.90 | 66.57 | 72.15 | 86.84 | k | 89.95 | 88.03 | 80.38 | 64.11 | 57.70 | 50.77 | 66.39 | a | |||||||||||
1982 | 46.67 | a | 52.82 | 54.18 | 61.13 | 70.73 | 77.43 | 85.11 | 85.58 | 77.27 | 64.02 | 54.47 | a | 46.52 | a | 64.66 | ||||||||||
1983 | 49.63 | a | 51.50 | a | 54.18 | 56.62 | 69.58 | 77.26 | a | 85.34 | 83.45 | a | 81.18 | 67.00 | 54.83 | a | 49.15 | e | 64.98 | |||||||
1984 | 50.02 | 51.16 | 57.61 | 60.40 | 76.40 | 79.12 | 87.10 | a | 84.21 | 79.45 | a | 62.23 | 52.97 | 46.45 | 65.59 | |||||||||||
1985 | 47.15 | 48.45 | 54.13 | a | 65.03 | 72.15 | a | 81.60 | 88.65 | 85.29 | 72.53 | 66.68 | 53.12 | a | 49.89 | 65.39 | ||||||||||
1986 | 54.62 | b | 53.31 | b | 59.44 | e | 62.44 | c | 71.63 | 83.07 | 84.48 | 86.95 | 72.00 | 64.32 | a | 56.33 | 48.03 | a | 66.39 | |||||||
1987 | 45.35 | 51.45 | 52.29 | 66.97 | 71.79 | 81.57 | 82.98 | 84.89 | 77.58 | 72.17 | g | 53.16 | k | 45.59 | b | 66.05 | b | |||||||||
1988 | 47.74 | 54.07 | a | 55.50 | a | 62.17 | a | 71.50 | b | 81.45 | a | 88.85 | a | 83.87 | 76.18 | 72.94 | 55.17 | a | 47.95 | 66.45 | ||||||
1989 | 47.07 | a | 51.45 | 60.29 | 70.22 | 73.13 | 80.95 | 89.08 | a | 83.94 | 78.69 | a | 68.32 | 59.00 | 48.93 | a | 67.59 | |||||||||
1990 | 46.98 | a | 49.17 | a | 58.06 | 64.97 | a | 69.87 | 82.97 | 87.35 | a | 83.10 | a | 79.33 | a | 69.02 | b | 57.14 | a | 43.98 | 65.99 | |||||
1991 | 47.94 | 57.04 | 51.08 | a | 60.57 | a | 67.68 | 75.77 | b | 86.27 | 85.18 | 79.20 | 70.77 | a | 56.32 | 49.06 | 65.57 | |||||||||
1992 | 49.05 | 54.13 | b | 56.08 | 65.53 | a | 73.03 | 78.00 | a | 84.03 | 86.25 | a | 79.39 | b | 70.03 | a | 52.97 | a | 45.05 | b | 66.13 | |||||
1993 | 48.58 | 49.80 | 57.70 | c | 63.21 | a | 72.93 | a | 77.50 | c | 80.78 | b | 84.05 | b | 77.20 | 67.84 | b | 51.83 | a | 48.23 | a | 64.97 | ||||
1994 | 49.58 | 47.83 | a | ----- | z | 65.15 | 70.05 | c | 83.39 | b | 87.27 | a | 88.16 | 80.48 | a | 65.03 | 50.45 | 48.87 | a | 66.93 | a | |||||
1995 | 48.50 | a | 57.20 | 55.62 | a | 59.25 | 65.42 | 76.89 | c | 85.86 | c | 86.47 | 80.88 | b | 69.02 | 61.93 | 51.53 | a | 66.55 | |||||||
1996 | 49.05 | b | 55.71 | 56.66 | b | 65.28 | c | 72.83 | b | 81.78 | 89.12 | b | 88.21 | 77.70 | c | 69.34 | b | 57.84 | b | 49.89 | c | 67.78 | ||||
1997 | 49.97 | a | 51.54 | 60.23 | a | 62.65 | d | 77.15 | 78.50 | a | 84.03 | a | 85.64 | b | 81.57 | 66.15 | 57.75 | 46.87 | a | 66.84 | ||||||
1998 | 49.02 | b | ----- | z | ----- | z | 57.07 | a | 66.10 | 75.27 | 87.91 | b | 86.71 | 77.43 | a | 64.92 | a | 56.02 | b | 49.00 | a | 66.94 | b | |||
1999 | 51.06 | f | 52.76 | a | 55.82 | f | 59.55 | 68.76 | f | 78.83 | a | 85.29 | g | 85.05 | i | 80.38 | j | 70.82 | l | 61.12 | j | 50.85 | k | 63.71 | i | |
2000 | 51.03 | l | 54.64 | k | 56.13 | h | 67.63 | k | 76.66 | o | 84.50 | l | 86.03 | m | 86.41 | h | 80.89 | k | 65.90 | k | 50.26 | k | 50.55 | l | ----- | z |
2001 | 48.02 | i | 47.59 | l | 58.12 | k | 62.00 | k | 78.53 | k | 82.00 | j | 85.15 | n | 85.68 | l | 81.91 | m | 71.95 | k | 58.32 | k | 45.52 | k | ----- | z |
2002 | 48.08 | l | 52.59 | k | 56.00 | p | 66.68 | k | 71.81 | o | 82.47 | j | 89.00 | m | 85.53 | p | 79.69 | n | 66.88 | r | 59.20 | o | 47.56 | n | ----- | z |
2003 | 56.69 | m | 50.86 | j | 54.81 | m | 59.57 | h | 78.04 | q | 80.74 | m | 91.19 | e | 86.91 | h | 83.10 | j | 76.44 | m | 52.00 | u | 49.21 | j | 91.19 | k |
2004 | 49.00 | k | 47.03 | k | 62.82 | l | 64.59 | m | 72.74 | n | 79.98 | h | 86.29 | l | 84.05 | k | 77.25 | n | 64.84 | o | 51.74 | m | 49.18 | t | ----- | z |
2005 | 48.71 | q | 52.50 | k | 54.11 | q | 61.54 | r | 67.93 | q | 79.21 | i | 89.23 | p | 84.09 | n | 78.42 | k | 68.31 | r | ----- | z | 49.91 | n | ----- | z |
2006 | 49.67 | p | 53.06 | l | 54.20 | p | 64.71 | p | 76.38 | r | 85.14 | p | 89.90 | p | 85.36 | m | 77.54 | q | 65.89 | l | 55.33 | u | 47.17 | v | ----- | z |
2007 | 47.25 | q | 52.25 | p | 61.68 | l | 64.50 | n | 73.19 | g | 79.38 | n | 88.02 | f | 87.92 | f | 79.37 | g | 67.74 | l | 61.34 | b | 45.88 | j | 61.34 | k |
2008 | 47.47 | l | 48.93 | g | 57.80 | d | 64.65 | j | 70.69 | d | 81.88 | 87.90 | b | 87.90 | e | 81.58 | j | ----- | z | ----- | z | 47.19 | 72.23 | f | ||
2009 | 52.62 | c | 50.57 | a | 56.97 | 62.62 | b | 77.17 | d | 78.70 | 89.63 | 85.97 | 81.18 | 64.37 | 58.69 | a | 45.23 | 66.98 | ||||||||
2010 | 50.84 | 51.39 | a | 54.37 | 59.85 | 67.76 | 79.77 | 89.45 | 85.55 | 80.83 | 68.87 | a | 54.32 | 52.26 | 66.27 | |||||||||||
2011 | 48.63 | 46.30 | 57.21 | 64.43 | 68.32 | 79.50 | 87.24 | 89.34 | 81.17 | 69.70 | a | 54.93 | 46.10 | 66.07 | ||||||||||||
2012 | 50.84 | 51.12 | 55.47 | 65.23 | 74.32 | 83.40 | 86.45 | 87.69 | 80.77 | 69.61 | 59.60 | 47.69 | 67.68 | |||||||||||||
2013 | 45.90 | 48.21 | 60.18 | 64.52 | 72.30 | f | 83.70 | c | 88.56 | 84.77 | c | 78.42 | 64.71 | 57.52 | 49.06 | 65.96 | a | |||||||||
2014 | 53.54 | c | 54.52 | 59.00 | o | 64.30 | 72.76 | 81.42 | 88.98 | 82.79 | 80.35 | 71.11 | 57.96 | d | 49.74 | f | 70.77 | b | ||||||||
2015 | 52.35 | 58.98 | 61.92 | e | 64.14 | e | 68.28 | b | 83.60 | 85.13 | e | 87.70 | c | 83.23 | b | 71.87 | 56.14 | e | 46.38 | b | 68.31 | |||||
2016 | 49.34 | 58.72 | b | 61.46 | d | 64.92 | d | 70.31 | b | 86.70 | 89.69 | 85.58 | 78.63 | 72.22 | a | 60.74 | a | 51.38 | a | 69.14 | ||||||
2017 | 50.03 | a | 55.00 | a | 61.87 | 63.66 | k | 71.61 | 83.59 | g | 90.05 | 86.85 | 78.75 | 71.52 | i | 62.15 | 54.88 | c | 67.91 | c | ||||||
2018 | 55.79 | 53.07 | 57.89 | 68.93 | i | 74.21 | e | 83.06 | e | 89.40 | 87.79 | 82.84 | a | 68.32 | 57.32 | 50.56 | 69.11 | a | ||||||||
2019 | 51.00 | 48.72 | l | 58.73 | i | 69.74 | i | 66.08 | m | 81.30 | b | 88.14 | c | 87.73 | g | 81.33 | a | 67.08 | e | 59.27 | b | 49.74 | d | 68.27 | e | |
2020 | 51.05 | i | 53.96 | o | 56.80 | k | 63.98 | g | 77.62 | f | 81.12 | d | 91.02 | h | 91.77 | 83.90 | e | 73.70 | d | 63.02 | h | 51.22 | o | 82.62 | h | |
2021 | 53.40 | p | 55.97 | m | 61.54 | s | 71.78 | u | 76.04 | q | 90.66 | n | 91.19 | j | 92.15 | n | 84.93 | g | 66.60 | p | 62.95 | h | 51.37 | 51.37 | k | |
2022 | 51.81 | 52.93 | f | 60.05 | 67.23 | 75.71 | 84.38 | a | 89.53 | b | 87.26 | 83.63 | c | 69.82 | a | 53.26 | a | 47.00 | i | 72.27 | b | |||||
2023 | 47.65 | e | 50.37 | a | 52.00 | b | 63.83 | 72.47 | 76.72 | 91.27 | a | 88.21 | 79.30 | 70.65 | 56.38 | a | 52.76 | 66.80 | ||||||||
2024 | 49.12 | e | 53.09 | 55.21 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 52.47 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 49.14 | 52.05 | 56.00 | 62.71 | 70.97 | 80.03 | 87.23 | 85.59 | 79.21 | 68.45 | 56.60 | 49.21 | 66.29 | |||||||||||||
S.D. | 2.77 | 3.39 | 3.16 | 3.03 | 3.19 | 2.78 | 2.26 | 2.11 | 2.49 | 2.77 | 2.82 | 2.55 | 1.03 | |||||||||||||
SKEW | -0.19 | 0.11 | -0.22 | 0.05 | -0.15 | 0.07 | -0.79 | 0.17 | -0.68 | -0.14 | -0.12 | 0.20 | 0.35 | |||||||||||||
MAX | 55.79 | 58.98 | 61.92 | 70.22 | 77.17 | 86.70 | 91.27 | 91.77 | 83.90 | 73.70 | 62.15 | 54.88 | 69.14 | |||||||||||||
MIN | 42.48 | 46.13 | 47.34 | 56.38 | 63.44 | 74.60 | 80.78 | 81.35 | 72.00 | 62.23 | 50.45 | 43.98 | 64.17 | |||||||||||||
YRS | 55 | 53 | 52 | 52 | 54 | 55 | 54 | 54 | 54 | 53 | 54 | 54 | 41 |