YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.87 | ----- | z | 36.53 | a | 46.20 | j | |
1925 | 39.39 | m | 46.75 | ----- | z | ----- | z | 69.86 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.75 | k | |
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 | 67.48 | i | 70.93 | b | 70.69 | a | 77.41 | i | ----- | z | 78.11 | c | 63.70 | h | ----- | z | ----- | z | 73.24 | i |
1940 | ----- | z | 47.00 | f | ----- | z | 62.07 | 75.71 | 79.46 | b | 79.58 | 85.19 | 77.65 | j | 55.17 | y | 46.56 | u | 47.31 | b | 71.55 | f | ||||
1941 | 46.31 | b | 55.72 | c | 66.18 | c | 67.25 | f | 69.33 | g | 76.38 | i | 86.16 | 81.32 | 68.62 | a | 60.94 | ----- | z | ----- | z | 66.46 | e | |||
1942 | ----- | z | ----- | z | ----- | z | 63.00 | d | 68.75 | g | 72.89 | c | 86.22 | d | ----- | z | 81.59 | c | 65.52 | d | 47.11 | k | 41.29 | c | 68.42 | f |
1943 | 39.38 | j | 48.92 | d | 52.00 | f | 64.41 | h | 64.10 | k | 69.92 | e | 79.92 | f | 78.33 | a | 81.66 | a | 65.65 | n | 53.93 | p | 45.74 | h | 69.71 | h |
1944 | 44.08 | g | 46.20 | d | 53.14 | q | 62.36 | s | 68.14 | c | 73.83 | f | 83.19 | 81.23 | a | 78.14 | b | 69.88 | w | ----- | z | ----- | z | 71.38 | g | |
1945 | 46.25 | g | 45.16 | i | 49.85 | k | 56.54 | d | 69.48 | 75.53 | k | 85.84 | 85.00 | b | ----- | z | 63.57 | x | 43.79 | p | 42.91 | h | 74.22 | h | ||
1946 | 42.00 | i | 45.67 | g | 52.56 | m | 62.46 | d | 72.05 | l | 70.46 | f | 82.15 | d | 82.00 | d | 72.96 | g | 55.90 | j | ----- | z | ----- | z | 75.54 | i |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 78.83 | m | 77.40 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 74.94 | m | 80.14 | i | 74.15 | e | 72.61 | l | ----- | z | ----- | z | ----- | z | 74.15 | k |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.97 | 77.97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 75.47 | j | ||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 79.33 | a | ----- | z | ----- | z | ----- | z | 44.36 | e | ----- | z | 61.85 | j |
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 | 45.53 | p | 47.56 | c | 51.96 | e | 59.07 | c | 64.76 | f | 67.87 | g | 82.55 | 82.45 | ----- | z | ----- | z | ----- | z | ----- | z | 64.72 | g | ||
1954 | 37.21 | l | 46.18 | 51.97 | a | 57.23 | 70.19 | 67.07 | 76.41 | b | 75.30 | a | 74.44 | l | 64.62 | e | 59.12 | m | 46.80 | u | 63.62 | d | ||||
1955 | 46.18 | i | 47.85 | h | 47.28 | m | 52.80 | j | 65.59 | n | ----- | z | 71.66 | b | 79.23 | ----- | z | ----- | z | 42.58 | k | 41.90 | b | 64.26 | i | |
1956 | 42.32 | 43.17 | f | 48.13 | 64.47 | 74.25 | c | 67.50 | 82.10 | b | 77.97 | 74.20 | 58.35 | 54.38 | d | 47.16 | 62.80 | a | ||||||||
1957 | 38.94 | 44.21 | 54.69 | b | 61.13 | 69.52 | 72.37 | c | 76.35 | 75.13 | 81.83 | 62.74 | 52.68 | b | 45.00 | 61.22 | ||||||||||
1958 | 47.97 | 52.79 | 53.55 | b | 58.50 | 76.45 | 75.77 | 87.16 | 84.03 | 73.77 | d | 69.06 | 49.72 | a | 48.55 | 64.78 | ||||||||||
1959 | 43.48 | 45.14 | 50.74 | 60.33 | 63.93 | a | 72.15 | d | 81.55 | b | 76.25 | c | 68.48 | g | 64.00 | 55.30 | 46.26 | 59.92 | a | |||||||
1960 | 41.35 | 47.83 | 54.00 | 59.20 | 61.68 | 72.92 | d | 82.74 | 75.87 | h | 71.79 | b | 62.83 | b | 50.08 | e | 48.39 | 59.35 | a | |||||||
1961 | 49.70 | a | 45.57 | 50.64 | c | 56.73 | 64.83 | a | 77.83 | 80.84 | 84.52 | 70.17 | 60.45 | 49.82 | b | 41.03 | 61.01 | |||||||||
1962 | 44.55 | 52.41 | a | 48.23 | 62.07 | 57.52 | 71.17 | 76.10 | 74.32 | 75.86 | a | 62.48 | b | 51.68 | e | 48.29 | j | 61.49 | a | |||||||
1963 | 42.14 | b | 54.68 | 51.61 | 53.53 | 66.00 | a | 68.14 | b | 71.97 | 75.45 | 75.23 | 61.65 | 46.59 | c | 45.65 | n | 60.64 | a | |||||||
1964 | 40.54 | c | 48.24 | 47.90 | 53.80 | 62.06 | ----- | z | 78.42 | 74.10 | 69.29 | b | 68.64 | f | 46.70 | 38.84 | 55.99 | b | ||||||||
1965 | 39.43 | a | 44.39 | 55.94 | 59.87 | 60.29 | 72.53 | 80.32 | 78.33 | a | 69.97 | 66.84 | 51.97 | a | 41.65 | 60.13 | ||||||||||
1966 | 37.52 | 44.79 | 52.29 | 59.60 | 68.53 | a | 68.47 | 74.19 | 76.42 | 74.27 | 64.92 | g | 51.73 | d | 44.63 | a | 59.31 | a | ||||||||
1967 | 41.77 | 51.14 | 48.29 | 54.73 | 66.27 | a | 74.87 | 80.97 | 87.94 | 81.17 | 63.00 | e | ----- | z | 41.00 | m | 65.01 | b | ||||||||
1968 | 42.23 | i | 58.30 | i | 58.33 | j | 59.59 | h | 69.14 | i | 72.50 | 81.71 | 75.90 | 73.47 | 63.96 | d | 53.37 | k | 41.14 | j | 73.51 | g | ||||
1969 | 35.37 | l | 46.45 | h | 60.16 | l | 62.05 | j | 74.24 | f | 78.17 | a | 78.30 | a | 77.00 | 72.93 | 63.35 | h | 56.71 | m | 47.76 | j | 76.60 | h | ||
1970 | 43.80 | k | 55.84 | i | 57.91 | i | 56.32 | h | 69.64 | f | 78.27 | 81.84 | 84.29 | 70.77 | 62.04 | c | 47.37 | k | 37.00 | p | 75.44 | g | ||||
1971 | 39.68 | l | 45.53 | m | 44.68 | i | 60.30 | g | 68.75 | k | 64.55 | h | 82.39 | 83.94 | 70.67 | 59.95 | j | 44.85 | j | 36.06 | o | 79.00 | i | |||
1972 | 35.37 | l | 43.90 | i | 54.17 | h | 55.80 | j | 71.72 | f | 72.41 | h | 79.26 | 79.86 | c | 67.60 | 64.15 | d | 47.84 | k | 35.61 | 65.30 | g | |||
1973 | 38.08 | f | 52.11 | j | 50.00 | i | 59.00 | b | 69.19 | 68.25 | f | 80.38 | b | 76.52 | 77.67 | 59.84 | 40.76 | a | 43.42 | 63.35 | d | |||||
1974 | 39.81 | 45.67 | d | 51.10 | a | 56.70 | 61.90 | a | 76.27 | 76.48 | 80.19 | 83.00 | 63.70 | k | ----- | z | 44.67 | a | 61.58 | b | ||||||
1975 | 41.45 | 43.88 | d | 50.71 | 55.17 | 71.43 | c | 70.93 | 78.97 | a | 74.32 | ----- | z | 56.00 | 48.90 | a | 47.42 | 58.11 | a | |||||||
1976 | 47.30 | a | 47.38 | 50.55 | b | 60.11 | b | 70.06 | 70.30 | 78.74 | 71.10 | 74.37 | 65.90 | a | 55.90 | a | 46.87 | 61.55 | ||||||||
1977 | 44.76 | b | 54.21 | 48.42 | 66.63 | 61.30 | a | 75.57 | 76.42 | 83.13 | a | 68.53 | 62.55 | 43.32 | b | 41.57 | a | 60.53 | ||||||||
1978 | 43.97 | 49.39 | 56.23 | 57.87 | 63.60 | a | 76.17 | 79.14 | b | 77.26 | 64.61 | b | 66.97 | 45.03 | 36.06 | 59.69 | ||||||||||
1979 | 37.87 | 40.00 | 56.55 | 58.55 | a | 69.10 | 74.29 | b | 81.42 | 77.52 | 76.77 | 63.87 | 50.07 | 44.61 | c | 60.88 | ||||||||||
1980 | 37.10 | 46.69 | 48.30 | a | 65.43 | 64.71 | 66.20 | 79.90 | a | 75.45 | 72.10 | 67.55 | 50.55 | a | 47.45 | b | 60.12 | |||||||||
1981 | 52.90 | 52.35 | b | 59.23 | 60.23 | 66.00 | 69.60 | 79.10 | b | 86.32 | 75.10 | 61.77 | a | 52.23 | 42.20 | a | 63.09 | |||||||||
1982 | 38.21 | b | 46.78 | e | 54.04 | e | 59.08 | f | 69.29 | g | 79.05 | h | 78.54 | g | 80.24 | f | 74.13 | g | 64.29 | j | 48.14 | b | 43.86 | c | 46.21 | g |
1983 | 47.10 | b | 50.77 | b | 56.37 | a | 64.37 | c | 73.17 | a | 70.12 | f | 75.10 | j | 80.04 | h | 71.13 | g | 63.83 | a | 47.72 | a | 35.31 | b | 54.83 | d |
1984 | 46.97 | a | 49.90 | 57.16 | 56.37 | 63.13 | 72.54 | b | 80.90 | 79.58 | 69.83 | a | 56.74 | 46.27 | 38.81 | 59.85 | ||||||||||
1985 | 44.87 | 42.50 | 53.03 | 60.73 | 68.40 | a | 74.89 | c | 87.97 | a | 78.19 | 68.48 | a | 58.32 | 39.64 | b | 42.81 | 59.99 | ||||||||
1986 | 47.37 | a | 46.61 | 57.40 | a | 58.46 | b | 67.10 | b | 75.89 | b | 72.43 | c | 85.21 | b | 68.23 | 67.58 | 48.43 | 44.55 | 61.61 | ||||||
1987 | 40.94 | 50.82 | 53.06 | 62.13 | 68.65 | 75.86 | a | 73.81 | 81.13 | 78.33 | 73.48 | 52.70 | 40.29 | 62.60 | ||||||||||||
1988 | 41.84 | 51.52 | 51.59 | b | 57.40 | 64.00 | a | 71.21 | a | 77.58 | 79.16 | 74.80 | 68.31 | b | 45.41 | a | 44.77 | 60.63 | ||||||||
1989 | 40.70 | a | 41.11 | 47.70 | a | 63.50 | 63.73 | a | ----- | z | 73.74 | 74.84 | 79.32 | b | 62.13 | 50.73 | 47.60 | a | 58.65 | a | ||||||
1990 | 42.39 | 42.93 | 57.32 | 63.30 | 62.63 | a | 70.61 | b | 82.97 | b | 79.52 | b | 77.13 | 55.40 | a | 48.40 | 34.80 | a | 59.78 | |||||||
1991 | 42.23 | 54.71 | 49.90 | a | 56.38 | a | 62.03 | b | 67.55 | a | 80.87 | a | 79.90 | 79.45 | a | 63.67 | a | 48.03 | 44.06 | 60.73 | ||||||
1992 | 44.90 | b | 56.18 | a | 62.84 | 60.85 | c | 73.77 | a | 75.53 | 77.23 | a | 80.87 | 70.43 | b | 60.84 | 48.36 | b | 39.96 | c | 62.65 | |||||
1993 | 39.83 | b | 49.04 | b | 55.10 | b | 54.36 | b | 70.11 | d | 67.84 | e | 67.16 | 76.72 | b | 77.24 | a | 65.72 | b | 46.21 | b | 43.63 | a | 59.41 | ||
1994 | 47.74 | 44.73 | b | 56.65 | 60.79 | b | 68.14 | c | 68.27 | 79.70 | a | 77.17 | a | 76.14 | b | 59.93 | b | 42.46 | b | 39.17 | a | 60.07 | ||||
1995 | 47.86 | b | 52.07 | a | 54.10 | 56.93 | a | 68.72 | b | 70.36 | b | 77.00 | a | 73.38 | b | 74.27 | 58.86 | c | 51.18 | b | 42.55 | 60.61 | ||||
1996 | 39.74 | 47.45 | 53.32 | c | 56.79 | a | 58.73 | a | 70.23 | 80.81 | 77.93 | a | 67.25 | b | 59.29 | c | 46.14 | a | 38.79 | b | 58.04 | |||||
1997 | 42.00 | b | 49.37 | a | 49.07 | b | 55.93 | a | 68.32 | 68.03 | a | 75.38 | b | 79.10 | 73.38 | a | 56.48 | b | 52.13 | 44.33 | a | 59.46 | ||||
1998 | 41.48 | 49.00 | 52.90 | 60.60 | 60.21 | c | 69.50 | 79.76 | b | 79.87 | 78.84 | e | 60.43 | c | 47.30 | 39.63 | a | 59.96 | ||||||||
1999 | 42.03 | a | 42.77 | b | 51.07 | a | 58.89 | b | 60.87 | a | 66.30 | 75.23 | 75.84 | 75.93 | 61.39 | 50.48 | a | 45.14 | b | 58.83 | ||||||
2000 | 40.87 | a | 48.90 | 50.65 | 63.25 | b | 62.72 | b | 71.52 | a | 75.90 | ----- | z | 70.72 | e | 59.67 | d | 47.43 | b | 44.03 | 57.79 | a | ||||
2001 | 46.30 | a | 48.57 | 53.81 | 55.34 | a | 68.21 | c | 65.07 | a | 73.00 | a | 77.06 | 74.26 | c | 56.57 | a | 49.48 | a | 41.60 | a | 59.11 | ||||
2002 | 41.28 | b | 47.92 | b | 46.79 | b | 57.96 | b | 62.31 | b | 72.41 | a | 78.63 | a | 78.23 | a | 73.60 | 63.61 | 55.47 | 44.21 | c | 60.20 | ||||
2003 | 48.86 | c | 49.57 | 50.11 | c | 55.96 | c | 64.28 | b | 74.90 | a | 81.81 | 81.03 | b | 76.22 | c | 62.86 | b | 45.97 | 42.43 | c | 61.17 | ||||
2004 | 40.12 | e | 49.75 | a | 57.40 | f | 65.52 | a | 64.07 | b | 73.03 | a | 80.00 | 78.27 | a | 68.20 | e | 62.25 | c | 50.00 | a | 46.23 | a | 61.59 | a | |
2005 | 47.93 | b | 55.52 | a | 58.07 | a | 58.52 | a | 66.86 | b | 67.83 | a | 78.87 | a | 82.18 | c | 71.69 | d | 62.21 | c | 48.25 | b | 42.37 | a | 61.69 | |
2006 | 43.14 | c | 46.08 | c | 50.53 | a | 59.85 | d | 68.07 | a | 72.17 | 79.27 | a | 77.87 | 74.17 | a | 60.90 | 45.50 | 42.30 | a | 59.99 | |||||
2007 | 42.90 | a | 47.07 | 54.30 | a | 58.73 | 69.58 | 70.67 | 82.03 | 78.13 | 72.17 | 57.13 | 49.97 | a | 38.48 | 60.10 | ||||||||||
2008 | 39.52 | 48.97 | 50.39 | h | 54.78 | g | 69.33 | j | 68.17 | g | 80.39 | h | 76.83 | a | 74.60 | 59.10 | 52.27 | 38.77 | 55.72 | e | ||||||
2009 | 43.55 | 49.21 | 46.42 | 58.57 | 67.48 | b | 72.13 | 83.81 | 77.55 | 74.17 | 56.77 | 47.30 | 38.97 | 59.66 | ||||||||||||
2010 | 47.29 | 51.82 | 54.03 | 55.30 | 59.29 | 65.73 | 76.87 | 77.48 | 68.57 | 60.10 | 44.07 | 41.55 | 58.51 | |||||||||||||
2011 | 41.52 | 42.21 | 46.13 | 49.10 | 58.65 | 65.43 | 72.58 | 76.77 | 75.30 | 56.29 | 44.80 | 42.35 | 55.93 | |||||||||||||
2012 | 39.32 | 45.24 | 46.13 | 57.43 | 63.39 | 64.87 | 74.90 | 79.81 | 74.83 | 58.84 | 47.63 | 38.58 | 57.58 | |||||||||||||
2013 | 41.00 | 44.86 | 52.23 | 54.80 | 65.39 | 71.10 | 78.39 | 78.00 | 69.70 | 61.35 | 48.97 | 40.42 | 58.85 | |||||||||||||
2014 | 47.65 | 42.57 | 50.94 | 59.03 | 67.90 | 69.03 | 81.13 | 81.00 | 74.83 | 63.65 | 48.13 | 45.94 | 60.98 | |||||||||||||
2015 | 48.68 | 54.25 | 58.97 | 59.20 | 68.06 | 78.97 | 83.55 | 79.45 | 69.43 | 64.55 | 47.27 | 39.39 | 62.65 | |||||||||||||
2016 | 40.03 | 53.21 | 55.19 | 68.77 | 71.03 | 74.43 | 78.16 | 82.84 | 72.27 | 60.55 | 54.83 | 38.16 | 62.46 | |||||||||||||
2017 | 36.87 | 41.04 | 48.68 | 55.37 | 68.77 | 73.23 | 80.39 | 84.26 | 76.40 | 57.94 | 45.60 | 41.97 | 59.21 | |||||||||||||
2018 | 43.71 | 44.71 | 51.81 | 57.97 | 72.84 | 72.97 | 87.42 | 83.42 | 74.77 | 64.68 | 52.37 | 44.16 | 62.57 | |||||||||||||
2019 | 48.71 | 41.93 | 54.39 | 60.13 | 71.19 | 74.23 | 79.06 | 83.06 | 69.47 | 59.29 | 51.70 | 43.45 | 61.39 | |||||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.20 | 48.00 | 52.69 | 59.09 | 66.53 | 71.76 | 79.25 | 79.19 | 73.81 | 61.83 | 48.77 | 42.36 | 60.46 | |||||||||||||
S.D. | 3.67 | 4.02 | 4.04 | 3.53 | 4.40 | 3.65 | 3.97 | 3.51 | 4.09 | 3.68 | 3.54 | 3.44 | 1.62 | |||||||||||||
SKEW | 0.40 | 0.15 | 0.76 | 0.23 | 0.04 | 0.06 | -0.25 | 0.30 | 0.17 | 0.46 | -0.17 | -0.23 | -0.01 | |||||||||||||
MAX | 52.90 | 56.18 | 66.18 | 68.77 | 76.45 | 79.46 | 87.97 | 87.94 | 83.00 | 73.48 | 55.90 | 48.55 | 64.78 | |||||||||||||
MIN | 36.87 | 40.00 | 46.13 | 49.10 | 57.52 | 64.87 | 67.16 | 71.10 | 64.61 | 55.40 | 39.64 | 34.80 | 55.93 | |||||||||||||
YRS | 59 | 63 | 59 | 63 | 62 | 62 | 72 | 70 | 65 | 62 | 58 | 61 | 42 |