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 | ----- | z | ----- | z | ----- | z | ----- | z |
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 | 62.25 | v | 65.16 | 79.85 | 84.74 | 83.05 | 77.53 | 64.79 | 51.16 | a | 48.24 | 69.32 | d | |||||||
1936 | 47.26 | 49.67 | 57.48 | 65.68 | 73.61 | 82.85 | 87.29 | 85.55 | 77.22 | 66.52 | 54.02 | b | 47.21 | 66.20 | ||||||||||||
1937 | 36.16 | 48.05 | 53.56 | 60.48 | 70.37 | 78.38 | 86.78 | a | 86.85 | 82.12 | 69.58 | 56.67 | 51.97 | 65.08 | ||||||||||||
1938 | 49.45 | 50.14 | 53.31 | 63.23 | 70.74 | 79.80 | 85.65 | 85.11 | 80.67 | i | 65.26 | d | 50.37 | 51.21 | 64.02 | a | ||||||||||
1939 | 46.84 | 42.12 | 55.39 | 64.57 | 70.61 | 78.12 | a | 87.05 | a | 85.63 | 75.52 | 62.82 | 57.07 | 52.40 | 64.84 | |||||||||||
1940 | 49.37 | 49.86 | 57.76 | 64.97 | 76.92 | 84.40 | 87.05 | 87.53 | 79.72 | 68.71 | 53.55 | 52.39 | 67.69 | |||||||||||||
1941 | 48.71 | 53.18 | 52.98 | 55.35 | 69.24 | 75.55 | 85.23 | 82.95 | 74.23 | 62.13 | 57.57 | 49.42 | 63.88 | |||||||||||||
1942 | 49.35 | 47.32 | 52.55 | 61.40 | 68.89 | 77.70 | 87.60 | 82.74 | 81.69 | l | 65.25 | g | 58.83 | a | 51.79 | e | 63.82 | b | ||||||||
1943 | 49.31 | 54.31 | a | 57.79 | 66.09 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.87 | h | ||
1944 | ----- | z | 46.00 | v | 55.24 | 59.38 | 70.98 | 75.48 | 89.37 | 94.24 | b | 86.12 | a | 76.08 | 57.95 | b | 55.22 | a | 72.01 | b | ||||||
1945 | 53.72 | a | 56.73 | b | 57.53 | 69.64 | a | ----- | z | 80.90 | 89.08 | a | 86.19 | 81.12 | 71.79 | ----- | z | ----- | z | 71.86 | c | |||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | 63.50 | c | 74.55 | 79.53 | a | 87.79 | 84.43 | a | 82.73 | 68.00 | 51.32 | 46.64 | b | 70.94 | c | |||||
1948 | 50.00 | b | 48.21 | 51.92 | 61.62 | j | 70.77 | 78.98 | 86.31 | 86.39 | 80.32 | 67.95 | 51.60 | 46.39 | 65.35 | a | ||||||||||
1949 | 38.68 | 46.39 | 53.02 | 65.25 | 68.11 | 80.15 | 86.52 | 83.10 | 81.47 | 64.32 | 60.25 | 46.21 | 64.46 | |||||||||||||
1950 | 43.69 | 53.38 | 56.39 | 65.48 | 68.00 | 75.12 | j | 85.08 | 85.23 | i | 76.32 | 71.94 | ----- | z | ----- | z | 65.03 | d | ||||||||
1951 | 47.23 | a | 50.12 | 54.76 | 62.28 | 71.03 | 76.68 | 88.50 | 83.50 | 80.05 | 67.13 | 54.33 | 46.60 | 65.19 | ||||||||||||
1952 | 45.68 | 48.52 | 49.90 | 60.87 | 72.74 | 77.40 | 84.90 | 86.84 | ----- | z | ----- | z | 53.62 | i | 47.06 | 63.77 | c | |||||||||
1953 | 52.30 | a | 50.20 | 55.85 | a | 60.92 | 64.82 | 78.40 | 88.39 | 84.81 | 80.08 | 66.95 | 57.12 | 46.56 | 65.53 | |||||||||||
1954 | 48.27 | 56.29 | 53.74 | 65.90 | 72.60 | 79.67 | 89.72 | b | 84.11 | 80.73 | 69.82 | 59.08 | 48.90 | 67.40 | ||||||||||||
1955 | 44.76 | 46.79 | 54.97 | 59.65 | 68.66 | 78.52 | 82.42 | 83.08 | 77.05 | 69.76 | 54.58 | 49.81 | 64.17 | |||||||||||||
1956 | 49.73 | a | 44.16 | 56.00 | 61.32 | 71.29 | 81.55 | 85.48 | 83.27 | 82.80 | 66.13 | a | 53.42 | 48.00 | b | 65.26 | ||||||||||
1957 | 48.34 | 56.70 | 56.37 | a | 61.32 | 66.84 | 83.33 | 88.73 | 85.07 | a | 78.78 | 64.47 | 50.48 | 49.21 | 65.80 | |||||||||||
1958 | 47.82 | 52.46 | a | 51.03 | 60.41 | a | 76.19 | 81.53 | ----- | z | 89.05 | a | 80.17 | 70.06 | 59.88 | r | ----- | z | 67.64 | c | ||||||
1959 | 50.21 | 48.81 | a | 58.58 | 67.33 | a | 69.48 | 84.18 | 90.89 | 84.79 | 77.28 | a | 67.84 | 56.57 | 50.13 | 67.17 | ||||||||||
1960 | 44.18 | 46.76 | 58.47 | 63.62 | a | 70.76 | 83.78 | ----- | z | ----- | z | 81.00 | 66.13 | 55.73 | 46.75 | a | 61.72 | b | ||||||||
1961 | 50.66 | 53.09 | a | 55.58 | 64.00 | a | 68.97 | a | 84.10 | 89.02 | a | 86.38 | a | 76.40 | 66.15 | 52.18 | 47.60 | 66.18 | ||||||||
1962 | 47.76 | b | 51.12 | 50.40 | a | 67.12 | 67.27 | 78.15 | 85.60 | 87.00 | 80.02 | 67.16 | 59.43 | 51.27 | 66.03 | |||||||||||
1963 | 44.89 | 57.04 | 54.63 | 58.68 | 72.34 | 75.30 | 86.67 | a | 84.17 | a | 81.09 | a | 70.39 | 56.63 | 48.60 | 65.87 | ||||||||||
1964 | 43.10 | a | 45.69 | 52.45 | a | 60.95 | a | 68.71 | 77.62 | 86.55 | 83.88 | b | 77.38 | 71.09 | b | 51.17 | 47.56 | 63.85 | ||||||||
1965 | 50.15 | 50.32 | 51.86 | b | 58.73 | 65.68 | 72.41 | b | 85.65 | 84.85 | 74.78 | a | 69.98 | c | ----- | z | 48.90 | a | 64.85 | a | ||||||
1966 | 45.13 | 45.25 | 56.16 | 63.95 | 73.08 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 56.71 | g | |||||
1967 | ----- | z | ----- | z | 59.56 | v | 57.37 | 71.00 | 76.10 | 87.50 | 86.06 | d | 78.08 | 69.55 | 59.27 | 45.47 | 70.04 | c | ||||||||
1968 | 48.98 | h | 56.19 | 57.05 | 62.12 | a | 70.13 | 82.22 | 86.40 | 82.77 | 78.63 | 67.71 | 57.10 | 44.72 | a | 67.73 | a | |||||||||
1969 | 50.89 | 50.23 | 50.35 | 64.93 | a | 77.69 | 80.88 | b | 85.23 | 86.98 | 80.95 | 64.44 | 55.62 | 49.19 | 66.45 | |||||||||||
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 | 49.14 | c | 56.31 | 60.88 | 70.84 | 83.10 | 84.38 | a | 82.68 | 78.57 | 66.58 | g | 55.32 | 45.27 | 66.65 | b | ||||||||
1975 | 47.35 | a | 49.02 | 53.44 | 56.04 | d | 68.44 | 77.98 | 85.95 | 83.06 | 78.32 | 65.13 | 54.50 | 49.78 | a | 64.08 | ||||||||||
1976 | 49.47 | 52.98 | 53.71 | 60.03 | 72.11 | 80.20 | 86.48 | 82.69 | 75.73 | 64.45 | 56.23 | 47.74 | 65.15 | |||||||||||||
1977 | 46.71 | 53.84 | 51.44 | 63.52 | 65.53 | 81.63 | 86.20 | a | 85.61 | 79.50 | d | 69.79 | 58.43 | 53.13 | 66.28 | |||||||||||
1978 | 49.10 | 50.71 | 56.94 | 58.52 | 68.69 | 81.16 | b | 86.39 | 83.44 | 77.98 | 70.27 | 54.28 | 44.52 | 65.17 | ||||||||||||
1979 | 42.66 | 47.86 | 52.69 | 59.28 | 68.45 | 78.75 | 84.45 | 81.56 | ----- | z | 69.37 | 51.85 | 50.47 | 62.49 | a | |||||||||||
1980 | 50.48 | 53.24 | 52.39 | 60.28 | 65.74 | 78.22 | 87.15 | 84.42 | 78.85 | 68.24 | 57.22 | 53.95 | 65.85 | |||||||||||||
1981 | 52.76 | 53.25 | 54.10 | 65.58 | 70.68 | 84.48 | 88.00 | 86.60 | 78.73 | 63.92 | 57.37 | 51.90 | 67.28 | |||||||||||||
1982 | 47.36 | c | 52.34 | 52.88 | a | 60.55 | 69.06 | 75.85 | 83.90 | 84.45 | a | 76.46 | c | 63.93 | a | 54.15 | 47.05 | 64.00 | ||||||||
1983 | 48.79 | 51.02 | 53.65 | 55.95 | a | 69.77 | 77.85 | 86.16 | 82.56 | 80.67 | 66.84 | 53.82 | 49.39 | 64.71 | ||||||||||||
1984 | 50.52 | b | ----- | z | 57.71 | 60.82 | 75.95 | a | 78.73 | 85.68 | 83.79 | 79.85 | 62.39 | 53.50 | 45.73 | 66.79 | a | |||||||||
1985 | 45.90 | 48.98 | 53.85 | 65.63 | 71.69 | 82.37 | 86.63 | 85.27 | 72.43 | 66.61 | 52.40 | 48.84 | 65.05 | |||||||||||||
1986 | 52.94 | 52.62 | 58.95 | 62.90 | 71.03 | 82.10 | 82.85 | 86.58 | 72.43 | 63.55 | ----- | z | 47.55 | 66.68 | a | |||||||||||
1987 | 46.18 | a | 49.86 | 53.05 | ----- | z | ----- | z | 81.23 | 82.10 | 84.69 | 77.03 | 70.55 | 54.43 | a | 44.63 | 64.38 | b | ||||||||
1988 | ----- | z | 52.83 | 55.90 | ----- | z | 70.27 | a | 80.67 | 87.65 | 83.55 | 75.73 | 72.94 | 55.33 | 46.42 | 68.13 | b | |||||||||
1989 | 45.87 | 51.62 | 59.13 | 68.52 | 70.95 | 80.23 | 88.12 | a | 83.66 | 78.42 | 67.91 | b | 57.45 | 48.36 | b | 66.69 | ||||||||||
1990 | 46.90 | a | 48.00 | 57.63 | 65.42 | 70.44 | e | 83.07 | 85.82 | 81.93 | c | 79.10 | 68.06 | 56.22 | a | 44.46 | d | 65.59 | ||||||||
1991 | 48.37 | a | 55.54 | 52.07 | b | 60.10 | 67.58 | 75.93 | 85.06 | 84.76 | 79.67 | 69.97 | 55.39 | b | 48.92 | a | 65.28 | |||||||||
1992 | 47.73 | 54.07 | a | 54.60 | a | 65.55 | 72.90 | 78.77 | 83.97 | 85.06 | 79.42 | 69.56 | 51.33 | 45.98 | 65.75 | |||||||||||
1993 | 50.16 | b | 49.62 | b | 57.48 | 62.93 | 72.58 | 79.00 | 82.73 | 82.94 | 76.18 | 65.93 | b | 53.07 | 47.64 | b | 65.02 | |||||||||
1994 | 49.29 | 46.14 | j | 57.12 | f | 61.95 | b | 68.85 | d | 82.95 | a | 85.53 | a | 87.46 | c | 80.31 | c | 64.52 | a | 49.84 | b | 48.69 | b | 67.94 | b | |
1995 | 48.60 | b | 56.00 | 54.68 | a | 59.43 | a | 64.50 | b | 75.70 | 85.07 | a | 86.98 | b | 80.28 | 68.75 | c | 60.75 | 50.58 | a | 65.94 | |||||
1996 | 48.40 | a | 54.90 | 56.58 | a | 63.88 | b | 72.42 | a | 80.58 | 88.17 | b | 87.48 | a | 77.32 | 67.00 | 57.52 | a | 50.14 | c | 67.03 | |||||
1997 | ----- | z | 50.16 | c | 61.03 | b | 62.66 | b | 77.27 | 76.90 | a | 84.26 | ----- | z | 81.13 | 65.02 | f | 55.65 | d | 45.60 | a | 66.07 | c | |||
1998 | ----- | z | 46.90 | b | 53.47 | b | 57.03 | 65.70 | a | 73.81 | a | 85.97 | a | 85.88 | c | 79.81 | a | 65.53 | 55.60 | a | 48.26 | 65.27 | a | |||
1999 | 50.88 | e | 51.86 | c | 56.13 | a | 57.33 | a | 69.68 | 77.93 | 83.87 | 84.19 | 79.12 | 70.34 | 60.69 | d | 49.17 | g | 67.46 | a | ||||||
2000 | 51.89 | i | 52.86 | d | 57.45 | b | 67.64 | a | 75.98 | 80.96 | c | 85.58 | a | 85.82 | a | 79.34 | a | 64.02 | b | 49.41 | b | ----- | z | 69.91 | b | |
2001 | 44.29 | n | 47.90 | b | 56.35 | 62.09 | a | 76.29 | e | 82.76 | e | 85.30 | d | ----- | z | ----- | z | ----- | z | 64.00 | r | ----- | z | 68.45 | f | |
2002 | 47.39 | d | 53.20 | c | 54.92 | 67.16 | n | 74.17 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.84 | i | |
2003 | ----- | z | 52.36 | j | 56.31 | 59.77 | 72.45 | 80.92 | ----- | z | ----- | z | ----- | z | ----- | z | 54.55 | i | 46.86 | m | 67.36 | h | ||||
2004 | 50.15 | h | ----- | z | 65.47 | o | 64.54 | g | 73.48 | i | 81.14 | i | 85.80 | c | 85.81 | d | 79.31 | f | 67.48 | d | 53.24 | m | 48.41 | o | 79.70 | i |
2005 | 48.81 | g | 51.06 | b | 54.67 | h | 61.40 | j | 70.47 | k | 76.57 | p | 87.39 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 51.06 | k |
2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 82.17 | ----- | z | ----- | z | ----- | z | ----- | z | 58.30 | j | 46.78 | m | 82.17 | k | |
2007 | 46.98 | j | 51.84 | i | 58.25 | k | 63.80 | j | 73.03 | k | 80.80 | j | 88.19 | m | 87.88 | o | 83.50 | u | 70.38 | w | 62.13 | k | 47.79 | q | ----- | z |
2008 | ----- | z | ----- | z | ----- | z | 62.45 | h | 69.56 | m | 82.42 | j | 87.69 | m | 87.26 | n | 80.61 | l | 71.56 | m | 60.25 | l | 49.65 | n | ----- | z |
2009 | 53.68 | q | 52.09 | k | 57.79 | q | 62.47 | k | ----- | z | 79.81 | l | 90.25 | i | 86.29 | q | 81.65 | j | 65.39 | i | 59.00 | o | 47.61 | q | ----- | z |
2010 | 50.89 | q | 51.33 | j | 53.31 | 59.25 | 65.52 | e | 77.21 | p | 88.87 | 84.77 | ----- | z | 67.03 | 53.20 | 50.98 | 65.37 | d | |||||||
2011 | 47.17 | b | 46.18 | 57.10 | 65.02 | 68.63 | 81.14 | e | 85.62 | c | 90.39 | q | 81.23 | 68.45 | 54.18 | 44.73 | c | 63.59 | a | |||||||
2012 | 53.88 | s | 50.17 | 56.03 | 57.00 | y | 73.94 | 82.14 | e | 86.04 | e | ----- | z | 79.50 | t | 73.90 | u | 56.66 | h | 53.08 | r | 69.66 | g | |||
2013 | 45.13 | a | 48.18 | 60.60 | 65.37 | 73.75 | i | 83.69 | a | 87.79 | 84.21 | 76.33 | 63.52 | d | 55.22 | 48.18 | 65.29 | a | ||||||||
2014 | 53.31 | 54.64 | 58.92 | 63.60 | 71.11 | 80.58 | 86.66 | 81.66 | 79.33 | 70.48 | 57.70 | 49.73 | 67.31 | |||||||||||||
2015 | 50.77 | 57.43 | 60.08 | 63.12 | 68.02 | 84.00 | 83.34 | 86.18 | 80.98 | 69.98 | 53.03 | 46.26 | 66.93 | |||||||||||||
2016 | 48.24 | 57.53 | 60.60 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.46 | i | |||
2017 | ----- | z | 54.09 | 54.44 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.09 | k | |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 85.10 | p | ----- | z | ----- | z | 61.59 | b | ----- | z | ----- | z | 61.59 | k |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 47.93 | 51.06 | 55.29 | 62.30 | 70.47 | 79.86 | 86.23 | 84.92 | 78.81 | 67.46 | 55.14 | 48.48 | 65.67 | |||||||||||||
S.D. | 3.22 | 3.50 | 2.65 | 3.22 | 3.18 | 2.81 | 1.82 | 2.06 | 2.50 | 2.92 | 2.84 | 2.51 | 1.07 | |||||||||||||
SKEW | -1.13 | -0.08 | 0.10 | -0.04 | 0.29 | -0.33 | 0.03 | 1.49 | -0.22 | 0.17 | -0.04 | 0.46 | 0.08 | |||||||||||||
MAX | 53.72 | 57.53 | 61.03 | 69.64 | 77.69 | 84.48 | 90.89 | 94.24 | 86.12 | 76.08 | 60.75 | 55.22 | 67.69 | |||||||||||||
MIN | 36.16 | 42.13 | 49.90 | 55.35 | 64.50 | 72.41 | 82.10 | 81.56 | 72.43 | 61.59 | 49.41 | 44.46 | 63.85 | |||||||||||||
YRS | 57 | 65 | 67 | 64 | 65 | 66 | 65 | 61 | 59 | 62 | 58 | 59 | 36 |