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 | 44.25 | a | 45.18 | 53.82 | 58.75 | b | 70.47 | a | 78.52 | a | 85.19 | 81.67 | a | 75.34 | a | 66.76 | 53.15 | f | 51.90 | 64.71 | a | |||||
1930 | 43.44 | 53.17 | a | 53.76 | 63.64 | a | 62.23 | 77.02 | c | 83.08 | 80.53 | a | 73.36 | a | 62.53 | 53.93 | a | 46.68 | 62.78 | |||||||
1931 | 47.40 | 50.57 | 55.34 | 64.14 | a | 69.06 | 76.98 | a | 87.30 | a | 81.02 | 73.92 | e | 65.56 | 50.48 | 43.64 | b | 63.79 | ||||||||
1932 | 41.03 | 47.68 | a | 54.30 | a | 59.48 | 66.31 | 73.42 | 82.02 | 80.88 | a | 77.35 | 64.47 | a | 58.50 | 43.63 | 62.42 | |||||||||
1933 | 43.38 | a | 42.54 | 54.68 | a | 56.27 | 61.08 | a | 76.32 | 85.40 | 83.06 | 79.28 | a | 69.77 | a | 57.90 | 49.76 | 63.29 | ||||||||
1934 | 49.11 | 53.79 | 61.66 | 66.02 | b | 73.69 | 72.81 | a | 85.23 | 81.85 | 75.32 | 67.27 | 55.72 | a | 49.82 | a | 66.02 | |||||||||
1935 | 46.50 | c | 50.68 | 50.74 | 60.10 | 62.84 | 76.88 | 81.58 | 80.52 | 75.30 | 64.00 | 51.27 | 48.06 | 62.37 | ||||||||||||
1936 | 46.47 | a | 46.84 | 56.60 | a | 62.65 | 70.95 | 79.80 | 83.53 | 81.42 | 74.50 | a | 65.26 | 55.50 | 45.75 | g | 65.77 | a | ||||||||
1937 | 33.00 | e | 46.07 | a | 50.89 | 58.55 | a | 68.72 | a | 75.34 | b | 83.10 | 83.81 | 79.42 | 68.33 | a | 57.09 | b | 50.60 | b | 62.91 | |||||
1938 | 49.12 | b | 46.46 | 49.89 | 60.30 | 66.50 | a | 77.27 | 82.00 | 83.02 | 79.27 | 64.81 | 50.12 | 49.90 | 63.22 | |||||||||||
1939 | 46.13 | 40.69 | b | 54.37 | a | 62.68 | 69.60 | a | 77.95 | 84.37 | a | 83.55 | a | 75.56 | c | 62.69 | b | 56.13 | 51.95 | a | 63.81 | |||||
1940 | 49.13 | 49.00 | 56.63 | 61.03 | 72.83 | a | 81.97 | a | 84.21 | 83.84 | 74.37 | 66.47 | 51.98 | 50.47 | a | 65.16 | ||||||||||
1941 | 46.11 | 50.55 | 51.82 | c | 53.52 | 68.78 | b | 73.13 | 81.68 | 77.87 | 71.73 | 59.97 | 56.05 | 47.66 | 61.57 | |||||||||||
1942 | 47.05 | 44.91 | 49.80 | c | 58.48 | 65.27 | a | 76.69 | a | 85.32 | 83.75 | a | 78.84 | a | 62.69 | 57.92 | 50.00 | a | 63.39 | |||||||
1943 | 47.13 | 51.43 | 54.47 | 61.38 | a | 69.27 | 74.42 | 83.56 | 81.08 | 77.88 | 65.58 | 54.73 | 47.50 | 64.04 | ||||||||||||
1944 | 44.82 | 44.53 | 50.58 | 55.42 | 65.98 | a | 70.93 | 82.25 | a | 83.47 | 77.08 | 66.47 | 50.69 | a | 48.89 | 61.76 | ||||||||||
1945 | 45.87 | a | 48.66 | 47.81 | 56.50 | d | 67.80 | a | 75.48 | d | 85.14 | b | 82.16 | 76.38 | i | 67.79 | j | ----- | z | ----- | z | 63.68 | d | |||
1946 | ----- | z | 57.26 | a | ----- | z | 67.80 | g | 71.26 | d | 82.21 | b | 84.53 | a | 85.54 | e | 80.17 | f | 59.25 | w | 50.63 | c | 49.37 | d | 68.69 | e |
1947 | 45.06 | d | 51.81 | d | 55.19 | e | 60.74 | c | 71.40 | b | 75.53 | a | 83.63 | a | 78.97 | a | 77.65 | 64.55 | 48.02 | c | 43.55 | b | 63.01 | |||
1948 | 46.56 | 44.52 | 46.60 | 60.16 | a | 67.59 | b | 75.26 | a | 81.98 | b | 81.05 | b | 78.39 | g | 65.09 | c | 48.60 | i | 44.54 | h | 63.20 | c | |||
1949 | 33.15 | 41.73 | b | 49.81 | d | 61.17 | d | 66.50 | 75.12 | a | 80.73 | 78.08 | 75.97 | a | 59.90 | a | 58.52 | b | 44.64 | b | 60.44 | |||||
1950 | 42.26 | 50.98 | 53.46 | f | 63.76 | a | 66.24 | 75.22 | 79.19 | 78.81 | b | 72.04 | b | 69.11 | 58.28 | a | 54.75 | a | 64.60 | a | ||||||
1951 | 46.15 | 47.71 | 52.03 | a | 57.60 | 66.39 | 74.29 | a | 83.09 | d | 77.24 | d | 76.05 | a | 63.39 | 51.02 | 42.97 | 61.49 | ||||||||
1952 | 41.46 | c | 46.31 | 44.53 | 57.65 | 70.61 | 74.03 | a | 81.02 | 82.23 | 77.48 | 70.79 | 49.33 | 45.82 | c | 61.77 | ||||||||||
1953 | 50.39 | 47.59 | 53.42 | 58.57 | 62.36 | c | 76.57 | 83.42 | a | 80.31 | 78.46 | b | 65.69 | 57.78 | 46.18 | c | 63.39 | |||||||||
1954 | 47.03 | 55.25 | 50.04 | c | 63.83 | 70.27 | a | 75.75 | 83.73 | a | 78.85 | a | 76.73 | 68.58 | a | 57.90 | 47.74 | 64.64 | ||||||||
1955 | 42.24 | b | 43.82 | 53.24 | 56.55 | a | 66.89 | 75.47 | 78.29 | 78.84 | 75.82 | 69.73 | 54.22 | c | 50.31 | 62.12 | ||||||||||
1956 | 50.56 | 43.60 | 55.75 | a | 58.26 | c | 69.47 | 79.40 | 81.37 | a | 79.37 | a | 79.78 | 64.15 | 53.15 | 48.67 | b | 63.63 | ||||||||
1957 | 44.40 | a | 54.16 | 53.34 | 57.40 | a | 63.13 | 79.22 | 83.40 | 80.00 | a | 76.12 | 60.45 | a | 48.28 | 50.39 | c | 62.52 | ||||||||
1958 | 47.13 | 50.61 | 46.53 | a | 56.73 | 72.47 | 77.32 | 83.35 | 82.21 | 75.35 | 67.42 | 53.30 | 53.35 | 63.81 | ||||||||||||
1959 | 48.47 | 44.98 | 54.56 | 63.87 | 65.42 | 80.57 | 85.71 | c | 79.07 | a | 73.33 | 66.93 | c | 56.27 | h | 48.91 | d | 64.71 | a | |||||||
1960 | 41.63 | 43.53 | 56.09 | b | 60.73 | 68.21 | 81.03 | 83.74 | 82.58 | a | 77.62 | 63.37 | 54.05 | 44.56 | g | 64.78 | a | |||||||||
1961 | 50.08 | a | 50.88 | 52.82 | 61.23 | 67.52 | 81.43 | 83.80 | a | 81.27 | 72.18 | 63.98 | 51.10 | f | 45.48 | 64.61 | a | |||||||||
1962 | 46.43 | a | 47.32 | 46.79 | b | 65.40 | 64.89 | 75.93 | 82.21 | 83.79 | 77.21 | a | 65.44 | 59.50 | a | 51.65 | a | 63.88 | ||||||||
1963 | 43.82 | 55.14 | 51.92 | 56.27 | 71.05 | 73.30 | 84.05 | a | 79.63 | a | 76.26 | a | 67.44 | 54.57 | 48.52 | a | 63.50 | |||||||||
1964 | 43.65 | 45.24 | 48.85 | 57.19 | a | 65.65 | a | 75.45 | 83.35 | 78.82 | a | 74.09 | a | 69.98 | 49.58 | 46.05 | a | 61.49 | ||||||||
1965 | 48.31 | b | 47.79 | 49.26 | 55.55 | 63.21 | b | 71.21 | a | 81.68 | 79.88 | b | 70.17 | 68.32 | a | 55.65 | 46.48 | 61.46 | ||||||||
1966 | 43.15 | a | 43.61 | 54.97 | 62.07 | 72.54 | e | 76.02 | 81.52 | 80.85 | 75.26 | a | 63.82 | 53.74 | e | 46.55 | 62.84 | |||||||||
1967 | 47.06 | 50.34 | 53.29 | b | 52.11 | b | 66.02 | a | 72.76 | a | 81.73 | 80.64 | b | 74.27 | 67.40 | a | 57.57 | a | 41.05 | a | 62.02 | |||||
1968 | 45.92 | 53.62 | 53.55 | a | 56.85 | 66.35 | e | 76.07 | 77.95 | a | 75.11 | 73.57 | 64.98 | 54.40 | 44.24 | 61.88 | ||||||||||
1969 | 48.40 | 44.30 | 49.69 | 59.52 | 69.45 | 73.47 | 81.71 | 82.58 | 75.98 | 61.27 | a | 54.18 | 48.93 | a | 62.46 | |||||||||||
1970 | 45.16 | 51.89 | 50.23 | a | 53.47 | 67.84 | 77.17 | a | 82.98 | 80.61 | 71.33 | 61.26 | 55.03 | 44.85 | 61.82 | |||||||||||
1971 | 46.35 | a | 48.25 | 54.48 | 57.13 | 62.41 | b | 74.02 | a | 84.69 | 78.58 | 73.83 | 58.68 | 51.57 | 41.85 | 60.99 | ||||||||||
1972 | 45.15 | 51.22 | 61.05 | 60.77 | 67.47 | 75.73 | 83.18 | 78.58 | 73.10 | a | 60.38 | a | 48.47 | 42.98 | 62.34 | |||||||||||
1973 | 42.16 | 46.70 | 44.60 | 55.47 | 68.60 | 76.83 | 80.68 | 79.15 | 72.75 | 65.21 | b | 52.05 | 48.19 | 61.03 | ||||||||||||
1974 | 44.32 | 47.22 | a | 53.87 | 59.00 | 68.56 | 80.60 | 79.66 | 78.31 | 75.41 | c | 64.84 | 53.78 | 43.77 | 62.45 | |||||||||||
1975 | 45.37 | 46.05 | 48.23 | 51.32 | b | 64.70 | a | 74.63 | 80.71 | 79.64 | b | 75.48 | a | 63.39 | 53.90 | d | 48.48 | 60.99 | ||||||||
1976 | 48.98 | 50.33 | 50.39 | 56.20 | 68.81 | 75.85 | 80.11 | 77.23 | g | 71.33 | a | 62.58 | 56.08 | 48.21 | 60.81 | a | ||||||||||
1977 | 45.58 | 52.20 | 48.45 | 60.62 | 61.11 | 77.72 | 81.05 | 79.52 | 73.62 | 66.84 | 57.22 | 51.52 | 62.95 | |||||||||||||
1978 | 46.44 | 48.05 | 55.21 | 56.33 | 66.05 | 77.52 | 81.56 | 79.08 | ----- | z | ----- | z | ----- | z | ----- | z | 63.78 | d | ||||||||
1979 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | 47.10 | b | 49.84 | b | 64.27 | d | 67.17 | d | 77.75 | b | 78.59 | b | 79.17 | b | 73.78 | a | 66.92 | a | 51.07 | 42.40 | 63.46 | a | ||
1988 | 44.98 | 50.67 | 53.15 | a | 58.92 | 66.35 | a | 77.57 | a | 82.78 | a | 78.15 | a | 72.83 | 70.28 | a | 53.28 | a | 46.34 | 62.94 | ||||||
1989 | 45.03 | 48.62 | b | 58.08 | 66.17 | a | 68.18 | a | 76.12 | b | 82.21 | 79.83 | m | 77.25 | 65.84 | 57.58 | 48.95 | a | 63.09 | a | ||||||
1990 | 45.29 | 45.43 | a | 55.06 | 62.33 | 66.95 | 80.55 | 82.27 | a | 79.58 | 76.55 | 67.02 | 56.50 | 42.55 | 63.34 | |||||||||||
1991 | 46.13 | 55.38 | 45.48 | 58.58 | 65.45 | b | 73.18 | b | 82.96 | e | 82.33 | a | 75.83 | 69.19 | 53.88 | b | 47.07 | a | 62.96 | |||||||
1992 | 46.23 | 51.02 | 51.84 | 63.73 | 70.40 | 75.93 | a | 80.87 | 80.55 | a | 76.97 | 68.05 | 51.03 | a | 42.90 | 63.29 | ||||||||||
1993 | 45.72 | a | 46.27 | 54.70 | a | 62.03 | 70.63 | 76.85 | 80.56 | 81.24 | 76.65 | 65.68 | a | 51.88 | 47.11 | 63.28 | ||||||||||
1994 | 49.06 | 46.20 | 57.44 | f | 61.21 | b | 67.53 | 81.93 | 84.12 | a | 85.36 | f | 78.00 | 63.38 | a | 48.26 | c | 47.15 | a | 62.69 | b | |||||
1995 | 44.68 | 54.98 | c | 52.57 | b | 56.57 | 63.13 | 75.68 | b | 83.71 | c | 84.17 | b | 79.27 | 68.52 | 59.79 | b | 50.39 | 64.45 | |||||||
1996 | ----- | z | 52.46 | a | 54.95 | a | 63.90 | 71.58 | 81.09 | c | 85.93 | a | 84.23 | 73.84 | a | 65.62 | b | 54.57 | c | 48.35 | 66.96 | a | ||||
1997 | 45.95 | a | 47.89 | a | 59.05 | b | 58.09 | b | 74.35 | a | 76.22 | a | 83.03 | a | 83.55 | b | 78.50 | 64.32 | c | 54.79 | b | 44.72 | a | 64.21 | ||
1998 | 48.26 | 43.85 | a | 51.92 | 56.02 | a | 63.91 | b | 73.57 | a | 84.79 | 84.17 | a | 75.20 | b | 63.75 | a | 54.90 | 47.65 | 62.33 | ||||||
1999 | 50.88 | a | 51.15 | e | 54.33 | b | 55.46 | b | 68.24 | b | 77.37 | 81.26 | b | 81.23 | a | 76.50 | 69.53 | 61.24 | a | 48.31 | e | 64.63 | ||||
2000 | 50.13 | 51.71 | a | 53.68 | a | 65.02 | f | 74.70 | a | 80.63 | 84.18 | 83.38 | c | 77.23 | 62.34 | 48.07 | c | 50.60 | 65.15 | a | ||||||
2001 | 43.87 | 46.33 | e | 54.63 | d | 58.21 | a | 75.78 | b | 80.45 | 82.60 | e | 83.33 | a | 79.98 | a | 69.20 | a | 56.38 | 44.25 | a | 64.58 | ||||
2002 | 46.28 | b | 51.91 | 53.05 | 63.16 | a | 69.42 | 76.90 | d | 81.05 | b | 79.34 | c | 72.74 | e | 58.32 | a | 51.95 | 41.11 | d | 62.10 | |||||
2003 | 50.02 | b | 43.98 | d | 48.67 | a | 53.05 | a | 65.63 | a | 74.55 | 82.94 | 78.21 | b | 74.38 | a | 67.50 | f | 46.91 | a | 42.89 | c | 60.11 | a | ||
2004 | 43.05 | a | 41.17 | b | 57.50 | 57.78 | c | 66.33 | a | 73.54 | b | 79.28 | b | 77.29 | b | 70.86 | a | 58.71 | b | 47.66 | a | 44.00 | a | 59.76 | ||
2005 | 40.90 | a | 39.56 | d | 45.84 | o | 56.36 | b | 68.05 | j | 75.04 | f | 83.00 | c | 78.28 | b | 73.40 | a | 62.46 | e | 53.33 | c | 44.21 | b | 59.05 | c |
2006 | 44.86 | c | 47.06 | a | 47.89 | d | 57.41 | c | 69.24 | b | 79.75 | d | 82.88 | a | 78.55 | a | 70.45 | 60.22 | a | 54.55 | a | 41.83 | d | 61.22 | ||
2007 | 41.69 | b | 46.02 | b | 53.48 | a | 59.25 | b | 68.24 | 75.91 | c | 81.92 | a | 80.37 | a | 73.20 | 61.76 | 55.80 | c | 40.03 | 61.47 | |||||
2008 | 40.26 | 44.67 | 51.02 | b | 57.15 | 62.53 | b | 75.62 | 80.84 | 79.50 | 73.48 | 63.00 | 54.09 | a | 42.38 | c | 60.38 | |||||||||
2009 | 46.22 | a | 45.09 | a | 50.03 | 54.77 | 70.11 | 71.92 | 82.37 | 77.74 | b | 74.48 | 58.15 | 53.23 | 39.34 | b | 60.29 | |||||||||
2010 | 43.90 | 44.05 | 47.63 | 52.86 | a | 59.55 | 73.30 | 82.40 | 77.82 | c | 74.43 | 62.15 | 49.18 | 46.94 | 59.52 | |||||||||||
2011 | 42.52 | 40.69 | b | 50.74 | 56.55 | 60.71 | 72.78 | 79.73 | a | 82.23 | 74.47 | 63.45 | 49.15 | 41.97 | 59.58 | |||||||||||
2012 | 45.13 | 45.24 | 49.34 | 58.25 | 67.77 | 77.02 | 79.48 | 80.53 | 73.93 | 63.32 | 54.05 | 42.87 | 61.41 | |||||||||||||
2013 | 40.16 | 41.55 | 53.16 | 57.50 | 65.53 | a | 77.12 | 81.82 | 78.63 | 71.97 | 58.12 | a | 51.85 | 42.48 | 59.99 | |||||||||||
2014 | 47.34 | 48.30 | 53.35 | a | 58.03 | 65.97 | 74.88 | 80.63 | 76.66 | 76.13 | o | 63.25 | u | 52.52 | d | 46.62 | e | 60.43 | b | |||||||
2015 | 46.45 | b | 51.38 | d | 54.57 | b | 57.75 | 60.55 | 78.33 | l | 77.45 | k | 80.74 | 75.45 | 64.32 | 47.07 | 41.18 | 57.94 | b | |||||||
2016 | 42.24 | 49.48 | 53.39 | 57.18 | 62.50 | 78.97 | 81.52 | 77.71 | 69.95 | 64.98 | b | 53.60 | 43.67 | b | 61.27 | |||||||||||
2017 | 41.66 | 47.70 | 53.97 | 57.08 | 65.23 | 77.78 | 81.40 | 78.75 | a | 70.87 | 64.38 | a | 56.47 | 48.17 | b | 61.96 | ||||||||||
2018 | 48.80 | a | 45.09 | 49.95 | 61.70 | 66.30 | a | 75.93 | a | 81.25 | a | 80.39 | 75.19 | a | 61.53 | 50.10 | e | 44.58 | f | 63.29 | a | |||||
2019 | 43.13 | d | 38.90 | b | 49.94 | 58.29 | a | 59.06 | 73.97 | a | 79.54 | d | 81.69 | g | 73.96 | d | 58.90 | a | 52.37 | c | 43.62 | b | 57.43 | a | ||
2020 | 44.20 | a | 45.07 | a | 48.59 | b | 56.23 | b | 68.70 | a | 74.07 | c | 81.52 | c | 84.32 | f | 74.35 | d | 64.96 | e | 53.77 | b | 43.65 | 59.55 | a | |
2021 | 43.18 | 44.68 | 47.27 | a | 60.21 | a | 66.75 | e | 79.86 | e | 81.97 | b | 80.18 | a | 74.28 | a | 58.77 | a | 55.85 | c | 45.45 | a | 61.54 | |||
2022 | 43.82 | 44.43 | 51.06 | e | 58.91 | a | 67.65 | a | 77.25 | b | 81.63 | a | 78.27 | 75.70 | b | 62.00 | 45.22 | 43.35 | 60.77 | |||||||
2023 | 40.79 | 42.68 | 44.29 | 56.05 | a | 65.21 | 70.00 | 84.23 | 80.44 | e | 72.37 | 64.62 | a | 52.97 | 45.50 | a | 59.93 | |||||||||
2024 | 41.65 | 44.80 | a | 48.84 | 52.53 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 45.10 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 45.14 | 47.61 | 52.06 | 58.86 | 67.20 | 76.40 | 82.40 | 80.48 | 75.06 | 64.53 | 53.51 | 46.37 | 62.39 | |||||||||||||
S.D. | 3.23 | 3.99 | 3.53 | 3.27 | 3.49 | 2.70 | 1.84 | 2.13 | 2.40 | 3.21 | 3.39 | 3.37 | 1.44 | |||||||||||||
SKEW | -1.05 | 0.19 | 0.05 | 0.18 | -0.04 | 0.20 | -0.03 | 0.19 | 0.01 | -0.14 | -0.19 | 0.11 | 0.03 | |||||||||||||
MAX | 50.88 | 57.26 | 61.66 | 66.17 | 75.78 | 82.21 | 87.30 | 85.54 | 79.98 | 70.79 | 61.24 | 54.75 | 66.02 | |||||||||||||
MIN | 33.00 | 38.90 | 44.29 | 51.32 | 59.06 | 70.00 | 77.95 | 75.11 | 69.95 | 58.12 | 45.22 | 39.34 | 59.52 | |||||||||||||
YRS | 85 | 88 | 84 | 85 | 86 | 85 | 86 | 82 | 82 | 82 | 81 | 81 | 64 |