YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
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 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 73.52 | 63.42 | 51.06 | 62.67 | i | |||
1954 | 54.81 | 61.30 | 56.53 | a | 71.28 | 74.89 | 81.98 | 85.81 | 81.15 | 82.33 | 74.32 | 66.13 | 55.44 | 70.50 | ||||||||||||
1955 | 47.13 | 50.25 | 59.24 | 65.37 | 72.18 | 81.75 | 83.21 | 81.24 | b | 83.23 | 76.74 | 60.50 | 57.53 | 68.20 | ||||||||||||
1956 | 57.03 | 47.83 | 61.58 | 63.92 | 76.08 | 86.22 | 84.55 | 83.84 | 85.97 | 72.35 | 59.20 | 54.29 | 69.40 | |||||||||||||
1957 | 52.24 | 60.43 | 58.03 | 63.78 | 68.85 | 84.30 | 87.18 | 84.05 | 82.13 | 67.94 | 54.63 | 56.47 | a | 68.34 | ||||||||||||
1958 | 52.95 | 56.34 | 52.18 | 63.10 | 79.47 | 84.78 | 88.15 | 85.77 | 81.50 | 72.40 | 60.27 | 60.34 | 69.77 | |||||||||||||
1959 | 55.89 | 52.52 | 61.06 | 70.95 | 73.11 | 86.95 | 88.00 | 81.56 | 80.82 | 72.39 | 60.19 | a | 53.27 | 69.73 | ||||||||||||
1960 | 46.66 | 47.98 | 62.52 | 67.82 | 74.31 | 87.32 | 88.34 | 85.35 | 84.67 | 69.82 | 62.55 | 52.44 | 69.15 | |||||||||||||
1961 | 55.58 | 55.91 | 58.26 | 66.79 | a | 74.21 | 85.80 | 87.21 | 84.05 | 78.35 | 71.45 | 56.34 | a | 51.85 | 68.82 | |||||||||||
1962 | 48.80 | a | 54.64 | 53.23 | 71.67 | 72.02 | 81.85 | 86.27 | 88.87 | 81.93 | 72.48 | 64.82 | 56.19 | 69.40 | ||||||||||||
1963 | 49.18 | 59.54 | 58.00 | 62.88 | 77.32 | 79.53 | 88.26 | 81.23 | 82.55 | 75.60 | 60.15 | 55.24 | 69.12 | |||||||||||||
1964 | 49.58 | 49.59 | 53.82 | 62.87 | 72.81 | 81.27 | 87.16 | 82.40 | 78.58 | 75.69 | 56.97 | 53.42 | 67.01 | |||||||||||||
1965 | 53.47 | a | 52.39 | 55.23 | 63.45 | 70.98 | a | 77.28 | 86.32 | 85.53 | 78.20 | 75.39 | 64.85 | 51.84 | 67.91 | |||||||||||
1966 | 48.68 | 48.20 | 60.77 | 67.97 | 76.68 | 83.72 | 86.81 | 85.29 | 80.78 | 71.15 | 63.02 | 53.27 | 68.86 | |||||||||||||
1967 | 52.08 | 55.46 | 62.10 | 59.00 | 72.50 | 78.82 | 84.13 | 84.95 | 80.38 | 74.79 | 65.17 | a | 48.40 | 68.15 | ||||||||||||
1968 | 53.26 | 59.60 | 58.76 | 63.73 | 74.23 | 84.35 | 85.08 | 81.24 | 79.65 | 72.48 | 59.78 | 49.80 | a | 68.50 | ||||||||||||
1969 | 55.65 | a | 52.20 | 54.47 | 67.52 | 75.95 | 81.07 | 87.24 | 88.21 | 83.66 | a | 69.63 | a | 59.35 | 54.26 | 69.10 | ||||||||||
1970 | 51.10 | 57.38 | b | 55.77 | 60.29 | a | 77.26 | 84.92 | 88.15 | 86.61 | 79.91 | a | 69.73 | 62.48 | 52.60 | a | 68.85 | |||||||||
1971 | 54.00 | a | 54.77 | 61.29 | 63.52 | 69.08 | 81.55 | 88.95 | 82.05 | 81.62 | 65.16 | 59.10 | 47.97 | b | 67.42 | |||||||||||
1972 | 53.45 | 59.63 | b | 68.56 | 67.17 | a | 74.81 | 83.22 | a | 90.02 | 84.63 | 81.48 | 68.26 | 54.28 | a | 49.87 | 69.62 | |||||||||
1973 | 48.73 | 51.95 | 50.95 | 62.20 | 75.56 | 83.22 | 85.87 | 87.00 | 80.37 | 72.27 | a | 60.93 | 54.65 | 67.81 | ||||||||||||
1974 | 52.00 | 52.46 | 55.89 | 62.78 | 74.29 | 87.92 | 86.52 | 85.52 | 80.68 | 72.24 | 61.15 | 49.10 | 68.38 | |||||||||||||
1975 | 47.87 | a | 52.77 | 55.89 | 58.50 | 67.56 | 82.68 | 85.73 | 86.27 | 83.12 | 71.80 | d | 60.90 | 54.35 | 67.29 | |||||||||||
1976 | 51.07 | a | 55.84 | 56.74 | 61.22 | 75.34 | 84.13 | 85.63 | 85.23 | 79.28 | 67.48 | 60.95 | 51.66 | 67.88 | ||||||||||||
1977 | 48.31 | 57.45 | 54.34 | 66.31 | a | 68.90 | 85.52 | 88.15 | 85.52 | 81.00 | 74.11 | 62.60 | a | 56.15 | 69.03 | |||||||||||
1978 | 51.40 | a | 51.48 | 58.95 | 65.60 | 71.59 | d | 86.36 | a | 88.62 | c | 85.02 | c | 79.79 | d | 76.17 | b | 60.16 | e | 48.50 | c | 68.64 | ||||
1979 | 46.81 | b | 53.94 | a | 59.38 | o | 66.63 | g | 70.58 | a | 83.88 | a | 87.61 | 83.77 | a | 85.62 | 74.28 | a | 57.55 | 57.69 | e | 70.17 | b | |||
1980 | 53.84 | 57.14 | a | 54.86 | f | 64.39 | g | 69.50 | k | 85.32 | h | ----- | z | 85.34 | f | 82.98 | e | 72.60 | b | 64.28 | l | 61.29 | l | 66.64 | h | |
1981 | 55.13 | h | 58.23 | d | 57.70 | f | 69.11 | c | 73.05 | 87.27 | 86.76 | b | 86.58 | a | 82.41 | b | 70.15 | d | 64.92 | e | 57.76 | f | 75.39 | c | ||
1982 | 50.93 | h | 54.10 | c | 56.14 | b | 65.56 | c | 71.07 | i | 80.79 | d | 84.93 | h | 84.97 | 79.77 | d | 69.77 | 58.22 | g | 49.90 | e | 67.62 | d | ||
1983 | 52.67 | d | 53.27 | d | 54.82 | a | 59.47 | 74.28 | a | 81.18 | 86.61 | 83.53 | 83.02 | a | 70.31 | 57.72 | 52.47 | 67.45 | ||||||||
1984 | 53.45 | 55.33 | 61.07 | b | 62.59 | a | 79.31 | 82.27 | 83.22 | d | 81.20 | i | 81.57 | a | 65.92 | a | 57.94 | n | 49.15 | d | 67.39 | b | ||||
1985 | 48.75 | a | 50.95 | g | 54.87 | a | 65.33 | f | 72.43 | d | 81.67 | f | 86.05 | c | 85.24 | 76.10 | d | 69.00 | d | 57.27 | 54.73 | a | 67.16 | c | ||
1986 | 60.16 | 55.74 | a | 62.74 | 67.18 | b | 75.52 | a | 85.65 | 77.63 | 85.76 | 78.98 | d | 69.48 | c | 58.89 | b | 53.23 | 69.25 | |||||||
1987 | 51.08 | a | 52.00 | a | 54.84 | b | 62.18 | e | 73.50 | b | 85.57 | c | 86.52 | a | 83.75 | a | 79.86 | a | 76.35 | a | 58.65 | c | 48.02 | a | 67.69 | |
1988 | 42.59 | c | 57.70 | b | 60.26 | 65.39 | c | 73.84 | 84.43 | 86.55 | b | 83.91 | b | 80.44 | c | 76.47 | b | 60.36 | a | 52.26 | 68.68 | |||||
1989 | 50.88 | a | 56.27 | 64.82 | a | 73.83 | 76.48 | a | 84.27 | 88.60 | a | 84.61 | c | 82.70 | 71.60 | a | 63.81 | a | 54.24 | b | 71.01 | |||||
1990 | 51.17 | b | 51.08 | b | 59.74 | b | 67.78 | a | 73.29 | 86.74 | a | 84.63 | a | 82.24 | 80.67 | 73.89 | 62.28 | c | 49.43 | a | 68.58 | |||||
1991 | 50.53 | a | 60.38 | 51.43 | a | 64.42 | 72.55 | 79.55 | 85.73 | a | 85.74 | b | 80.60 | 74.80 | a | 58.12 | 51.02 | a | 67.91 | |||||||
1992 | 50.48 | a | 55.79 | 57.43 | b | 69.70 | 73.75 | a | 82.16 | a | 84.83 | b | 82.68 | a | 82.71 | a | 75.84 | 56.43 | a | 49.60 | 68.45 | |||||
1993 | 52.44 | 52.00 | b | 59.10 | 67.30 | 76.18 | a | 83.72 | a | 85.10 | a | 88.25 | m | 79.93 | i | 72.03 | a | 58.12 | b | 54.02 | c | 66.00 | b | |||
1994 | 55.05 | 52.72 | a | 61.02 | b | 67.61 | c | 72.71 | 86.96 | e | 88.03 | 88.29 | 81.91 | a | 68.54 | c | 54.45 | a | 53.44 | 69.23 | ||||||
1995 | 49.83 | a | 60.16 | 58.68 | 64.24 | k | 69.05 | b | 81.16 | a | 88.83 | a | 87.53 | b | 83.32 | 75.37 | a | 65.55 | 56.52 | 70.55 | a | |||||
1996 | 55.18 | a | 58.64 | a | 60.27 | 69.16 | a | 78.03 | 86.63 | 87.31 | b | ----- | z | 78.10 | t | 71.47 | a | 61.71 | a | 52.04 | e | 68.04 | b | |||
1997 | 51.15 | d | 54.41 | a | 64.93 | a | 63.91 | c | 78.84 | b | 82.67 | a | 87.30 | a | 86.00 | a | 83.60 | ----- | z | 62.25 | 48.19 | b | 69.39 | a | ||
1998 | 53.14 | f | 47.00 | f | 54.93 | a | 59.81 | a | ----- | z | ----- | z | 87.56 | e | 86.64 | c | 82.02 | a | 70.63 | 60.54 | b | 52.24 | b | 69.30 | d | |
1999 | 56.52 | 59.28 | a | 61.68 | 60.65 | 74.19 | 82.40 | 83.95 | a | 85.69 | 82.68 | 76.65 | 68.57 | 54.18 | 70.54 | |||||||||||
2000 | 56.83 | a | 58.50 | a | 58.86 | b | 70.45 | a | 79.69 | 85.25 | 89.03 | 86.22 | b | 85.47 | 69.13 | 52.55 | a | 56.60 | a | 70.72 | ||||||
2001 | 50.33 | a | 52.25 | 59.45 | 64.97 | 79.18 | 85.65 | 86.70 | a | 84.78 | a | 85.30 | 75.11 | c | 64.25 | 50.48 | a | 69.87 | ||||||||
2002 | 53.05 | 57.95 | 59.12 | b | 70.90 | 75.29 | 87.60 | a | 88.40 | 87.11 | 83.88 | 70.37 | 64.07 | a | 51.80 | a | 70.80 | |||||||||
2003 | 61.08 | 54.56 | b | 57.16 | b | 63.75 | 76.19 | 84.58 | 89.53 | 86.98 | 83.73 | 78.56 | 59.34 | a | 53.70 | a | 70.76 | |||||||||
2004 | 53.69 | 51.38 | i | 66.81 | 66.45 | b | 76.84 | c | 84.59 | a | 87.25 | c | 84.97 | a | 81.26 | e | 69.96 | d | 55.83 | a | 52.69 | e | 70.94 | a | ||
2005 | 53.76 | h | 53.80 | a | 57.38 | e | 66.41 | c | 76.23 | a | ----- | z | 89.98 | a | 83.50 | e | 84.15 | c | 73.58 | a | 64.54 | c | 58.09 | h | 72.17 | c |
2006 | 55.71 | j | 59.17 | d | 56.50 | b | 67.71 | d | 79.47 | a | 88.42 | 88.44 | 84.11 | ----- | z | ----- | z | ----- | z | ----- | z | 74.83 | e | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 52.05 | 55.05 | 58.36 | 65.43 | 74.41 | 83.88 | 86.74 | 84.84 | 81.73 | 72.25 | 60.55 | 52.75 | 68.92 | |||||||||||||
S.D. | 3.51 | 3.51 | 3.77 | 3.60 | 3.01 | 2.57 | 2.10 | 1.93 | 2.09 | 3.01 | 3.45 | 2.85 | 1.05 | |||||||||||||
SKEW | 0.12 | -0.16 | 0.38 | 0.12 | -0.20 | -0.36 | -1.65 | -0.22 | -0.13 | -0.15 | -0.10 | 0.22 | 0.30 | |||||||||||||
MAX | 61.08 | 61.30 | 68.56 | 73.83 | 79.69 | 88.42 | 90.02 | 88.87 | 85.97 | 78.56 | 68.57 | 60.34 | 71.01 | |||||||||||||
MIN | 42.59 | 47.83 | 50.95 | 58.50 | 67.56 | 77.28 | 77.63 | 81.15 | 76.10 | 65.16 | 52.55 | 47.97 | 67.01 | |||||||||||||
YRS | 48 | 50 | 50 | 49 | 50 | 49 | 51 | 49 | 50 | 52 | 50 | 50 | 39 |