YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1928 | 41.14 | c | 49.88 | 57.60 | 59.32 | 71.71 | 75.35 | 76.68 | 74.66 | 70.05 | 60.37 | 51.17 | 42.85 | 60.90 | ||||||||||||
1929 | 41.84 | c | 47.62 | d | 50.77 | e | 55.13 | d | 67.20 | d | 73.16 | e | 78.81 | d | 79.93 | d | 72.69 | d | 67.26 | d | 52.88 | d | 48.33 | e | 61.30 | |
1930 | 43.05 | c | 52.72 | c | 53.90 | e | 58.52 | d | 61.48 | c | 74.48 | e | 79.07 | c | 78.94 | e | 69.13 | d | 62.20 | d | 53.20 | e | 42.90 | e | 60.80 | |
1931 | 45.98 | d | 57.35 | d | 54.50 | e | 62.45 | j | 71.46 | e | 69.85 | d | 83.20 | c | 81.65 | d | 68.63 | d | 63.26 | d | 51.29 | d | 45.14 | c | 62.94 | a |
1932 | 42.85 | d | 47.96 | d | 54.86 | c | 57.73 | d | 67.77 | e | 75.44 | d | 77.67 | b | 77.28 | b | 75.52 | d | 62.87 | d | 55.96 | d | 40.20 | d | 61.34 | |
1933 | 40.69 | d | 45.73 | d | 53.48 | d | 59.00 | c | 60.22 | d | 70.25 | d | 82.63 | e | 80.19 | d | 70.12 | d | 69.69 | e | 54.56 | c | 44.69 | e | 60.94 | |
1934 | 44.09 | d | 52.30 | c | 60.88 | b | 67.29 | d | 70.47 | b | 73.35 | d | 79.27 | a | 80.64 | b | 74.43 | b | 64.78 | a | 53.48 | 45.48 | a | 63.87 | ||
1935 | 45.00 | a | 48.70 | a | 49.16 | 58.63 | 67.84 | i | 76.04 | b | 76.86 | b | 79.84 | f | 73.87 | 60.60 | 48.53 | 45.45 | a | 58.28 | b | |||||
1936 | 48.10 | e | 48.71 | a | 54.30 | c | 59.70 | 68.37 | 75.13 | 82.15 | 79.74 | 73.55 | 64.11 | 53.08 | 43.08 | 62.50 | ||||||||||
1937 | 39.18 | 49.12 | 53.08 | 56.42 | 67.73 | 74.02 | 81.29 | 78.42 | 71.22 | 63.95 | 54.27 | 48.61 | 61.44 | |||||||||||||
1938 | 44.71 | 51.20 | 52.11 | 59.47 | 68.05 | 76.18 | 80.77 | 77.98 | 74.88 | 62.45 | 50.73 | 48.65 | 62.27 | |||||||||||||
1939 | 46.10 | 47.12 | 55.34 | 65.07 | 68.13 | a | 74.40 | 80.71 | 79.37 | 75.30 | 64.27 | 56.02 | 50.94 | 63.56 | ||||||||||||
1940 | 49.10 | 54.67 | 58.60 | a | 63.33 | 71.23 | 78.05 | 77.92 | 77.61 | 70.10 | 64.66 | 52.50 | 51.79 | 64.13 | ||||||||||||
1941 | 51.08 | 54.73 | 57.85 | 58.10 | 67.83 | b | 71.62 | a | 81.53 | 75.26 | 69.38 | 61.13 | 55.30 | 49.35 | 62.76 | |||||||||||
1942 | 48.37 | 49.46 | 54.82 | 59.43 | 63.83 | a | 73.20 | 80.52 | 78.26 | 71.21 | a | 64.71 | 53.50 | a | 46.55 | 61.99 | ||||||||||
1943 | 46.71 | 52.64 | 57.13 | e | 61.73 | 67.60 | 69.22 | 77.56 | 74.02 | 74.08 | 63.42 | 54.60 | 49.10 | 62.32 | ||||||||||||
1944 | 48.10 | 50.27 | a | 55.23 | 57.43 | 67.15 | 69.42 | 76.81 | 75.85 | 73.93 | 66.17 | a | 52.22 | 47.20 | d | 61.65 | ||||||||||
1945 | 44.14 | b | 50.88 | b | 50.98 | a | 59.48 | a | 65.27 | 73.43 | 81.77 | c | 76.40 | a | 73.38 | 64.05 | b | 52.30 | 47.37 | 61.62 | ||||||
1946 | 43.77 | 46.78 | a | 53.57 | a | 62.28 | 67.21 | 72.80 | 79.26 | 78.23 | 72.82 | 60.78 | a | 49.38 | 45.53 | 61.03 | ||||||||||
1947 | 40.56 | 50.71 | 57.20 | a | 63.36 | b | 71.98 | a | 75.00 | 77.02 | 75.58 | 74.83 | 62.85 | 49.00 | 43.94 | 61.84 | ||||||||||
1948 | 49.40 | 47.62 | 52.08 | 58.47 | 63.50 | 74.15 | 78.87 | 76.82 | 70.73 | h | 63.89 | 51.47 | 43.06 | 59.94 | a | |||||||||||
1949 | 38.39 | 46.12 | 52.68 | 63.67 | 67.11 | 77.54 | d | 79.56 | f | 73.79 | 72.58 | 62.85 | 57.00 | 43.97 | 59.61 | a | ||||||||||
1950 | 41.82 | 51.00 | 52.60 | 62.67 | 67.50 | 72.72 | 81.39 | 77.06 | 72.25 | ----- | z | 57.60 | 50.40 | 62.46 | a | |||||||||||
1951 | 45.03 | 48.84 | 52.19 | 60.22 | 66.33 | b | 71.95 | a | 77.54 | f | 76.77 | p | ----- | z | ----- | z | 55.05 | a | 45.53 | a | 55.64 | d | ||||
1952 | 45.74 | 51.33 | 52.28 | b | 60.90 | 71.58 | a | 71.02 | 80.05 | j | 76.50 | e | 75.38 | a | 67.40 | 52.07 | 47.79 | 61.09 | a | |||||||
1953 | 50.60 | k | 49.09 | 53.92 | 59.53 | ----- | z | 69.73 | 80.92 | 75.00 | d | 74.85 | 62.89 | 54.60 | 46.42 | a | 62.69 | b | ||||||||
1954 | 47.17 | a | 50.75 | b | 53.37 | a | 65.12 | a | 70.98 | 72.93 | a | 81.52 | a | 75.17 | a | 71.45 | a | 64.05 | a | 52.47 | a | 44.63 | 62.47 | |||
1955 | 42.35 | 48.09 | a | 54.21 | 55.88 | 67.48 | 74.46 | e | 77.86 | b | 80.76 | b | 74.64 | a | 65.95 | 51.34 | a | 49.30 | a | 61.86 | ||||||
1956 | 48.74 | 46.71 | a | 55.00 | a | 60.68 | 67.63 | 76.31 | a | 79.33 | b | 76.73 | c | 74.67 | 62.60 | 53.20 | 45.36 | c | 62.25 | |||||||
1957 | 43.33 | a | 55.02 | a | 56.05 | a | 61.36 | a | 66.02 | d | 77.78 | 80.97 | 76.66 | 74.05 | a | 61.76 | 52.25 | 45.26 | 62.54 | |||||||
1958 | 45.94 | f | 53.98 | 52.53 | 60.12 | 71.06 | 74.08 | 80.23 | 83.58 | 76.68 | 70.39 | 55.17 | 50.55 | 66.22 | a | |||||||||||
1959 | 49.76 | 49.50 | 58.53 | 65.68 | 67.31 | 77.42 | 83.44 | 78.95 | a | 71.22 | 67.61 | 55.82 | 47.11 | 64.36 | ||||||||||||
1960 | 45.61 | 49.72 | 56.92 | a | 61.07 | 66.47 | 81.53 | 84.76 | 80.08 | 75.70 | 63.90 | 52.22 | 44.45 | 63.54 | ||||||||||||
1961 | 41.50 | a | 51.96 | a | 54.50 | 63.13 | 64.56 | 78.82 | 83.52 | 81.29 | 72.73 | 65.39 | 52.15 | 44.31 | 62.82 | |||||||||||
1962 | 40.85 | 46.54 | 51.37 | 63.80 | 64.58 | 74.57 | 79.85 | 77.73 | 72.90 | 63.18 | 55.53 | 47.25 | a | 61.51 | ||||||||||||
1963 | 41.94 | 56.22 | a | 53.29 | 55.67 | 66.92 | 71.30 | 76.29 | 77.35 | 73.68 | 66.46 | q | 46.30 | t | 39.53 | 61.22 | b | |||||||||
1964 | 43.97 | 48.29 | 52.02 | 59.32 | 63.95 | 72.12 | 79.65 | 78.87 | a | 70.05 | 68.12 | a | 50.62 | a | 49.58 | 61.38 | ||||||||||
1965 | 45.72 | a | 48.76 | a | 54.63 | a | 59.07 | 66.18 | 70.15 | ----- | z | 78.84 | 68.68 | 66.66 | 55.27 | 41.74 | 59.61 | a | ||||||||
1966 | 44.39 | 46.89 | a | 55.70 | a | 64.27 | ----- | z | 74.77 | 76.82 | 80.37 | a | 72.58 | 65.08 | 55.91 | a | 45.02 | b | 61.98 | a | ||||||
1967 | 45.34 | 48.38 | 53.69 | 51.67 | 67.84 | 71.77 | 83.29 | 83.65 | 76.47 | 65.66 | 57.72 | 43.10 | 62.38 | |||||||||||||
1968 | 43.66 | 54.88 | 56.02 | 61.33 | 66.52 | 76.35 | 81.30 | a | 75.27 | 73.05 | 63.68 | 52.38 | 43.65 | 62.34 | ||||||||||||
1969 | 45.05 | b | 47.89 | 53.19 | 59.35 | 69.31 | 71.60 | a | 80.95 | 80.74 | 76.83 | 61.05 | 55.07 | 47.55 | 62.38 | |||||||||||
1970 | 49.50 | 52.41 | 55.11 | 56.55 | 69.47 | b | 74.85 | 82.63 | 78.82 | a | 73.45 | 63.53 | 55.43 | a | 46.85 | 63.22 | ||||||||||
1971 | 45.32 | a | 46.65 | a | 52.95 | 57.73 | 63.58 | 72.93 | 81.23 | 81.18 | 73.63 | 61.69 | 51.25 | b | 42.58 | g | 62.56 | a | ||||||||
1972 | 40.34 | f | 50.46 | b | 59.79 | b | 60.42 | 69.15 | a | 77.02 | 81.05 | 78.00 | 70.90 | 63.83 | a | 50.83 | 41.10 | 63.87 | a | |||||||
1973 | 45.47 | 51.79 | 51.15 | a | 61.07 | 71.85 | 78.38 | 79.64 | c | 78.48 | 72.00 | 63.45 | 51.75 | 45.69 | g | 64.09 | a | |||||||||
1974 | 46.35 | a | 48.12 | 54.55 | 58.23 | 68.39 | 76.20 | 79.56 | 78.95 | a | 76.68 | 66.40 | 51.89 | b | 44.37 | 62.48 | ||||||||||
1975 | 42.70 | a | 49.02 | 51.68 | 53.52 | b | 67.10 | 74.00 | 77.27 | 75.19 | 73.17 | 59.84 | b | 47.91 | a | 43.21 | 59.55 | |||||||||
1976 | 43.71 | 49.64 | a | 51.27 | e | 55.52 | 69.22 | b | 72.23 | 79.42 | 72.27 | 71.22 | a | 63.58 | a | 53.52 | 44.02 | 60.47 | ||||||||
1977 | 42.05 | 51.63 | a | 51.45 | 62.32 | b | 60.79 | 75.93 | 77.92 | 75.88 | a | 70.92 | 63.94 | 53.08 | 49.73 | a | 61.30 | |||||||||
1978 | 49.98 | 50.46 | 58.16 | 58.86 | a | 66.52 | 72.93 | 78.19 | b | 75.40 | a | 68.96 | e | 66.47 | 50.38 | 40.78 | a | 61.43 | ||||||||
1979 | 45.69 | b | 47.76 | a | 54.90 | 59.63 | 69.37 | 75.80 | 78.56 | 76.61 | 75.90 | 66.02 | 51.98 | 47.03 | 62.44 | |||||||||||
1980 | 49.97 | b | ----- | z | 53.28 | b | ----- | z | 62.74 | n | ----- | z | 80.19 | ----- | z | 71.77 | 65.18 | 53.17 | 46.44 | e | 60.00 | e | ||||
1981 | 48.85 | a | 51.41 | f | 53.48 | 61.26 | a | 69.35 | 80.78 | 79.63 | h | 79.87 | e | 75.74 | m | 58.61 | 54.97 | 47.47 | a | 61.63 | c | |||||
1982 | 42.53 | 49.98 | a | 52.35 | e | 58.10 | a | 66.75 | a | 71.15 | 78.65 | a | 77.11 | h | 69.93 | a | 62.60 | a | 49.31 | a | 44.66 | 58.73 | a | |||
1983 | 43.13 | e | 51.62 | 54.66 | b | 56.78 | 67.06 | 73.10 | a | 75.75 | a | 79.28 | b | 75.88 | d | 65.78 | a | 53.43 | a | 49.24 | 62.14 | |||||
1984 | 46.10 | b | 48.89 | a | 57.62 | a | 58.68 | 72.39 | 74.03 | a | 82.33 | a | 78.34 | b | 77.08 | d | 58.73 | 51.70 | b | 43.62 | b | 62.46 | ||||
1985 | 39.93 | c | 48.46 | c | 50.43 | a | 63.92 | 65.26 | 76.33 | g | 79.50 | g | 74.65 | 69.48 | b | 60.30 | f | 50.93 | b | 41.31 | b | 56.04 | c | |||
1986 | 50.14 | b | ----- | z | 58.22 | a | 60.82 | 68.21 | 76.43 | c | 78.69 | 80.16 | c | 68.30 | c | 63.31 | 53.85 | 44.37 | a | 63.86 | a | |||||
1987 | 42.27 | c | 50.20 | a | 54.38 | a | 65.22 | 70.60 | 75.93 | 74.89 | 77.40 | 73.57 | c | 68.37 | 52.57 | a | 44.47 | 62.49 | ||||||||
1988 | 45.78 | a | 51.50 | 55.97 | 60.83 | 65.85 | 73.62 | 82.81 | 78.30 | a | 73.82 | 67.15 | a | 53.11 | b | 43.56 | 62.69 | |||||||||
1989 | 41.76 | 47.09 | a | 56.48 | e | 64.77 | b | 67.85 | 74.30 | 79.42 | a | 76.15 | 71.83 | a | 63.00 | b | 52.53 | 41.87 | 61.42 | |||||||
1990 | 44.52 | 46.34 | 55.71 | 63.93 | 66.19 | 74.45 | 81.47 | a | 78.83 | d | 73.78 | 66.00 | e | 51.84 | a | 39.72 | b | 61.90 | ||||||||
1991 | 45.55 | c | 53.83 | a | 51.42 | a | 58.08 | 64.61 | 72.31 | a | 81.31 | b | 75.77 | a | 77.04 | b | 67.86 | c | 54.41 | b | 44.32 | c | 62.21 | |||
1992 | 40.50 | b | 54.07 | a | 57.48 | 64.33 | 73.22 | a | 74.52 | 78.53 | b | 80.53 | a | 74.57 | 66.52 | 52.93 | b | 42.68 | f | 65.20 | a | |||||
1993 | 45.10 | e | 50.80 | c | 57.74 | d | 59.60 | 67.43 | a | 73.65 | 77.30 | f | 76.75 | a | 73.17 | 65.79 | e | 52.48 | a | 44.39 | c | 60.63 | a | |||
1994 | 45.89 | c | 48.50 | b | 57.31 | d | 61.20 | e | 66.50 | a | 75.13 | 79.66 | c | 79.35 | 73.50 | b | 62.58 | 45.85 | f | 43.10 | a | 62.98 | a | |||
1995 | 50.64 | c | 51.56 | a | 55.21 | c | 58.43 | a | 65.18 | 72.06 | c | 78.35 | a | 79.09 | c | 74.46 | b | 65.12 | a | 57.74 | a | 49.54 | c | 63.11 | ||
1996 | 47.18 | c | 53.38 | c | 56.02 | f | 62.70 | g | 68.25 | a | 75.27 | f | 82.90 | f | 81.08 | e | 71.62 | j | 60.87 | e | 52.65 | g | 48.06 | f | 62.15 | g |
1997 | 49.30 | k | 50.00 | i | 57.61 | q | 62.37 | g | 73.20 | d | 74.82 | k | 78.70 | i | 79.62 | j | 76.06 | e | 63.23 | g | 56.80 | h | 43.76 | f | 74.63 | j |
1998 | 48.70 | d | 48.88 | b | 55.68 | i | 57.55 | j | 61.07 | b | 71.05 | 80.39 | 81.05 | 74.18 | 61.45 | a | 51.40 | 43.02 | h | 64.24 | c | |||||
1999 | 44.56 | g | 49.13 | e | 52.24 | 56.17 | a | 65.48 | i | 72.18 | 77.10 | 75.58 | a | 73.95 | 66.47 | 54.73 | 44.65 | 62.22 | b | |||||||
2000 | 48.24 | l | 52.78 | b | 53.83 | j | 62.17 | 68.43 | a | 77.59 | a | 76.19 | 78.74 | 72.87 | 62.98 | 48.21 | b | 46.23 | a | 64.62 | b | |||||
2001 | 44.15 | a | 48.45 | 56.55 | l | 57.38 | i | 74.42 | a | 77.47 | 78.48 | a | ----- | z | 73.94 | n | 67.11 | l | 52.94 | m | 45.78 | m | 64.59 | g | ||
2002 | 43.47 | l | 48.93 | n | 53.10 | k | 61.86 | i | 65.43 | i | 77.17 | l | 80.68 | l | ----- | z | 74.75 | n | 62.69 | j | 54.74 | m | 47.05 | j | ----- | z |
2003 | 48.30 | k | 47.87 | i | ----- | z | 57.52 | h | 66.32 | a | 75.41 | a | 82.95 | 77.61 | 75.75 | 66.82 | a | 48.78 | 47.10 | a | 67.59 | d | ||||
2004 | 44.71 | b | 48.95 | 59.37 | 62.38 | 67.97 | 74.53 | 79.82 | 77.81 | 72.42 | 61.65 | a | 50.25 | b | 44.31 | d | 62.01 | |||||||||
2005 | 45.64 | b | 51.80 | 55.65 | 57.68 | 67.52 | 73.06 | u | 82.58 | 79.55 | 69.82 | 62.68 | 54.57 | a | ----- | z | 62.75 | b | ||||||||
2006 | 47.44 | 49.66 | 48.87 | 58.20 | 68.63 | a | 75.00 | l | 83.29 | b | 76.16 | b | 71.82 | 60.55 | 53.27 | 44.21 | g | 61.79 | b | |||||||
2007 | 41.58 | a | 49.55 | ----- | z | 60.74 | c | 68.69 | 74.88 | a | 79.27 | a | 79.38 | a | 71.00 | 60.59 | d | 53.82 | 43.44 | 62.09 | a | |||||
2008 | 45.85 | 48.67 | 54.18 | 58.46 | p | 68.02 | a | 75.60 | 79.98 | 79.97 | 73.48 | 64.25 | s | 54.70 | h | 43.74 | 63.28 | c | ||||||||
2009 | 45.73 | 50.96 | 53.45 | 59.97 | 71.97 | 73.22 | l | 81.61 | i | 79.05 | 76.50 | a | 60.63 | 50.82 | 44.94 | 59.40 | b | |||||||||
2010 | 47.11 | 50.68 | 53.60 | b | 56.43 | b | 63.26 | 76.67 | o | 80.70 | d | 76.82 | c | 73.92 | 65.18 | 51.27 | 49.40 | 60.76 | a | |||||||
2011 | 45.19 | 47.91 | a | 53.89 | 59.30 | 63.88 | a | 72.36 | b | 80.21 | s | 78.81 | 76.54 | c | 65.24 | 51.12 | 42.90 | 59.74 | a | |||||||
2012 | 46.55 | 50.67 | 54.74 | 60.90 | 68.48 | g | 74.52 | h | 77.74 | 81.08 | e | 74.78 | l | 71.00 | w | 55.08 | l | 42.81 | 59.21 | e | ||||||
2013 | 47.20 | u | 47.84 | f | 59.29 | g | 61.93 | h | 65.13 | a | 77.52 | 82.35 | e | 78.55 | 72.98 | 61.42 | 54.20 | 43.60 | 66.97 | d | ||||||
2014 | 49.71 | 53.48 | 58.76 | 63.53 | 70.48 | 76.32 | 82.56 | 79.94 | 76.12 | a | 67.21 | 54.43 | a | 51.11 | 65.30 | |||||||||||
2015 | 46.92 | 55.02 | 61.47 | 62.22 | 66.92 | 79.22 | 80.66 | 79.60 | 75.78 | 68.53 | 50.28 | a | 44.89 | 64.29 | ||||||||||||
2016 | 49.21 | c | 54.13 | f | 57.16 | b | 63.58 | e | 69.21 | b | 78.50 | b | 80.00 | 78.89 | 72.17 | c | 63.93 | a | 55.05 | 45.29 | 64.82 | a | ||||
2017 | 46.07 | a | 53.86 | 56.29 | 60.25 | 69.05 | b | 77.58 | 83.45 | 82.58 | 74.38 | 62.00 | 55.80 | 45.61 | 63.91 | |||||||||||
2018 | 51.96 | q | 48.48 | 54.26 | 62.05 | 67.88 | b | ----- | z | 83.73 | 79.13 | 73.37 | 63.81 | 54.43 | 50.27 | 63.74 | b | |||||||||
2019 | 49.89 | 47.46 | 54.54 | g | ----- | z | ----- | z | ----- | z | 83.53 | k | 81.03 | 73.75 | 60.87 | 54.27 | 50.16 | b | 59.63 | e | ||||||
2020 | 47.44 | 51.86 | 54.27 | 61.92 | 70.35 | 72.91 | m | 81.38 | a | 82.53 | 76.10 | 71.22 | k | ----- | z | ----- | z | 65.73 | d | |||||||
2021 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2022 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2023 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 45.26 | 50.22 | 54.62 | 60.26 | 67.65 | 74.44 | 80.03 | 78.32 | 73.23 | 64.02 | 52.96 | 45.59 | 62.26 | |||||||||||||
S.D. | 2.96 | 2.56 | 2.59 | 2.94 | 2.84 | 2.63 | 2.20 | 2.28 | 2.26 | 2.50 | 2.21 | 2.86 | 1.10 | |||||||||||||
SKEW | -0.06 | 0.55 | 0.32 | -0.15 | -0.20 | 0.22 | -0.09 | -0.09 | -0.30 | 0.18 | -0.06 | 0.19 | 0.40 | |||||||||||||
MAX | 51.08 | 57.35 | 61.47 | 67.29 | 74.42 | 81.53 | 84.76 | 83.65 | 77.08 | 70.39 | 57.74 | 51.79 | 65.30 | |||||||||||||
MIN | 38.39 | 45.73 | 48.87 | 51.67 | 60.22 | 69.22 | 74.89 | 72.27 | 68.30 | 58.61 | 47.91 | 39.53 | 59.55 | |||||||||||||
YRS | 83 | 85 | 83 | 82 | 85 | 80 | 80 | 86 | 86 | 83 | 84 | 82 | 49 |