YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1943 | ----- | z | ----- | z | 58.55 | 67.82 | 73.97 | 80.67 | 82.37 | 82.92 | 73.22 | 63.23 | 51.72 | 43.23 | a | 67.77 | b | |||||||||
1944 | 40.50 | 49.55 | 52.31 | 61.42 | 70.00 | 78.40 | 81.16 | 78.70 | a | 72.41 | a | 65.57 | a | 51.90 | 43.91 | c | 62.15 | |||||||||
1945 | ----- | z | 49.82 | 52.90 | 60.85 | 70.85 | a | 77.28 | 80.60 | a | 76.39 | 73.00 | a | 61.71 | b | 51.02 | 43.38 | b | 63.44 | a | ||||||
1946 | 39.94 | 45.25 | 54.23 | 64.10 | 65.45 | b | 80.86 | a | ----- | z | 82.40 | 77.47 | 65.33 | a | 49.59 | a | 47.42 | 61.09 | a | |||||||
1947 | 40.06 | 48.41 | 54.03 | 61.17 | 73.48 | 78.47 | 84.08 | 81.58 | 77.05 | k | 65.37 | 48.77 | b | 41.90 | 61.58 | a | ||||||||||
1948 | 41.95 | a | 47.43 | b | 51.50 | e | 65.55 | 73.08 | 80.97 | 82.55 | 81.24 | 74.90 | 64.06 | 45.82 | 46.98 | 63.00 | ||||||||||
1949 | 38.63 | 48.59 | 55.39 | 61.72 | 71.03 | 79.83 | 82.27 | 79.83 | a | 75.40 | 61.77 | 54.35 | 42.52 | 62.61 | ||||||||||||
1950 | 46.31 | 51.75 | 56.63 | 64.82 | 69.65 | 81.98 | 79.39 | 79.27 | 73.41 | a | 69.71 | 53.13 | 48.34 | 64.53 | ||||||||||||
1951 | 43.23 | a | 47.30 | 53.95 | 60.72 | 72.06 | 79.52 | 85.81 | 81.89 | 77.05 | 66.52 | 50.98 | 46.52 | 63.80 | ||||||||||||
1952 | 48.85 | 47.62 | 50.76 | 62.43 | a | 72.15 | 82.22 | 82.29 | 82.84 | 76.57 | b | 65.71 | 49.00 | 42.69 | 63.59 | |||||||||||
1953 | 48.56 | 47.48 | 56.97 | 62.71 | a | 67.60 | 83.37 | 84.16 | 81.32 | 76.13 | 64.13 | 52.28 | 38.68 | 63.62 | ||||||||||||
1954 | 45.92 | 52.20 | 55.13 | 67.92 | 73.07 | a | 80.83 | 83.71 | 80.11 | 78.42 | 68.10 | 53.77 | 45.50 | 65.39 | ||||||||||||
1955 | 42.03 | 45.07 | 55.40 | 63.41 | a | 70.39 | 79.50 | 80.29 | 80.26 | 75.82 | 65.47 | 52.53 | 48.50 | 63.22 | ||||||||||||
1956 | 47.81 | 44.67 | 56.42 | 61.12 | 75.34 | 84.43 | 82.48 | 79.03 | 76.52 | 66.84 | 47.08 | 43.40 | 63.76 | |||||||||||||
1957 | 49.11 | 56.16 | 56.19 | 62.20 | 67.83 | a | 82.17 | 84.58 | 80.34 | 72.12 | 61.45 | 47.88 | 44.74 | 63.73 | ||||||||||||
1958 | 41.61 | 49.98 | 50.42 | a | 61.88 | b | 74.16 | 83.03 | o | 83.93 | a | 81.85 | 73.12 | 61.48 | 51.22 | c | 46.26 | 61.45 | a | |||||||
1959 | 45.24 | h | 47.70 | e | 51.52 | b | 64.78 | 72.21 | 82.90 | a | 82.91 | c | 80.98 | j | 76.04 | b | 63.65 | 50.35 | d | 45.13 | 63.72 | b | ||||
1960 | 40.79 | 44.66 | 56.15 | 62.00 | c | 70.09 | h | 82.56 | f | ----- | z | 76.96 | h | 72.75 | b | 60.92 | k | 49.58 | 37.13 | 51.86 | e | |||||
1961 | 39.80 | c | 45.20 | h | 51.88 | e | 57.18 | k | 69.32 | f | 77.37 | 79.35 | 77.97 | 70.90 | 60.35 | 44.93 | 43.24 | 60.65 | c | |||||||
1962 | 37.68 | 49.54 | 46.09 | d | 62.84 | e | 69.55 | b | 75.87 | 76.92 | a | 79.67 | a | 71.32 | 63.26 | 52.33 | 43.10 | 60.68 | ||||||||
1963 | 36.98 | 45.57 | 51.94 | 61.00 | 70.29 | 75.78 | a | ----- | z | 76.00 | a | 72.77 | 64.28 | a | ----- | z | 40.98 | 59.56 | b | |||||||
1964 | 36.45 | 37.43 | 46.93 | a | 57.38 | ----- | z | 76.42 | 80.56 | 78.74 | ----- | z | 61.52 | a | 48.82 | 40.65 | 56.49 | b | ||||||||
1965 | 45.05 | a | 42.59 | 48.73 | 60.42 | 68.34 | 74.15 | 80.94 | 78.71 | 71.10 | 63.69 | 58.07 | a | 45.92 | 61.47 | |||||||||||
1966 | 39.97 | 41.88 | 55.15 | 63.07 | 72.87 | a | 79.04 | b | 84.57 | a | 78.74 | 73.68 | 62.14 | c | 55.48 | 43.56 | 62.51 | |||||||||
1967 | 42.52 | 47.69 | a | 58.70 | a | 63.47 | a | 68.94 | 77.79 | a | 83.43 | a | 79.53 | 73.85 | 65.21 | 53.85 | 41.82 | a | 63.07 | |||||||
1968 | 43.19 | b | 50.97 | 51.67 | b | 58.74 | a | 70.97 | a | 80.35 | 80.88 | b | 77.85 | 73.17 | 66.97 | 52.40 | 40.45 | 62.30 | ||||||||
1969 | 48.57 | a | 48.00 | 49.19 | 65.43 | 73.31 | 81.22 | 86.55 | b | 85.76 | 77.33 | i | 67.43 | a | 51.84 | a | 47.37 | 64.06 | a | |||||||
1970 | 45.15 | 50.73 | 53.23 | a | 62.07 | 72.85 | 80.13 | 83.63 | a | 83.38 | a | 75.92 | 61.65 | 53.53 | 49.21 | 64.29 | ||||||||||
1971 | 47.40 | 49.46 | 58.56 | 63.35 | 71.63 | 82.13 | 85.29 | 79.56 | 76.00 | 63.94 | 55.14 | a | 47.12 | b | 64.97 | |||||||||||
1972 | 47.56 | 50.93 | 63.03 | 65.75 | 72.11 | 80.55 | 84.63 | a | 80.03 | 74.95 | 68.37 | 51.53 | 46.23 | 65.47 | ||||||||||||
1973 | ----- | z | 46.96 | 54.16 | 59.03 | 71.63 | ----- | z | 83.17 | a | ----- | z | 77.33 | 65.42 | 54.08 | 45.40 | 61.91 | c | ||||||||
1974 | 46.30 | a | 46.88 | 60.31 | 65.10 | 74.89 | 82.87 | 80.57 | a | 78.25 | c | 71.72 | 64.42 | 51.18 | 41.24 | 63.64 | ||||||||||
1975 | 43.18 | 48.61 | 55.11 | 59.10 | 68.15 | 79.53 | 80.16 | 80.97 | 73.03 | 64.18 | 51.33 | 44.61 | 62.33 | |||||||||||||
1976 | 43.34 | 53.28 | 56.27 | a | 63.55 | 70.37 | 80.25 | b | 80.19 | 80.65 | 73.55 | 59.55 | 46.05 | 41.45 | a | 62.37 | ||||||||||
1977 | 43.32 | a | 48.79 | 52.10 | 64.28 | 71.47 | 81.93 | 83.34 | 83.95 | 79.10 | 65.40 | 54.53 | 49.24 | 64.79 | ||||||||||||
1978 | 45.58 | 48.62 | 58.00 | 65.03 | 72.55 | 84.27 | 86.48 | 80.85 | 72.26 | a | 65.13 | 54.40 | 43.60 | 64.73 | ||||||||||||
1979 | 42.87 | 48.61 | 54.11 | 63.71 | a | 70.39 | 79.62 | 85.18 | a | 78.50 | a | 75.37 | 66.87 | 49.03 | 44.55 | a | 63.23 | |||||||||
1980 | 47.79 | 51.03 | 54.02 | a | 61.70 | 70.80 | a | 84.57 | b | 87.00 | b | 81.98 | ----- | z | 61.90 | a | 50.77 | b | ----- | z | 65.16 | b | ||||
1981 | 45.25 | a | 51.21 | 54.68 | 64.92 | f | 72.83 | k | 83.40 | 84.40 | k | 79.48 | a | 76.20 | 65.62 | e | 52.67 | d | 44.32 | 61.43 | c | |||||
1982 | 40.42 | a | 46.80 | e | ----- | z | 64.09 | c | 69.40 | 80.11 | b | 83.13 | ----- | z | 76.27 | 59.95 | b | 48.83 | a | 41.30 | f | 63.22 | c | |||
1983 | 39.12 | f | 47.98 | d | 52.59 | d | 56.62 | e | 68.67 | a | 77.80 | 81.22 | d | 81.32 | 77.28 | a | 64.55 | b | ----- | z | 43.38 | c | 65.14 | b | ||
1984 | 41.67 | d | 46.80 | a | 55.98 | c | 62.85 | d | 73.72 | b | 77.18 | 79.52 | a | ----- | z | 75.87 | c | 61.48 | b | 51.55 | a | 42.68 | c | 60.85 | a | |
1985 | 40.52 | c | 46.54 | b | 54.72 | b | 65.79 | b | 72.40 | g | ----- | z | 83.43 | a | 81.27 | 72.20 | 63.43 | a | 53.71 | a | 43.82 | 60.54 | b | |||
1986 | ----- | z | 53.48 | a | 58.10 | a | 69.12 | a | 73.31 | b | 78.40 | 79.68 | a | 79.24 | b | 74.78 | a | 64.42 | a | 49.36 | a | 43.18 | a | 65.73 | a | |
1987 | 38.76 | 47.26 | a | 51.65 | 60.00 | 69.59 | b | 77.95 | 82.05 | a | 79.37 | 71.70 | 66.44 | 51.03 | 40.73 | 61.38 | ||||||||||
1988 | 41.60 | 48.54 | a | 52.45 | 60.07 | a | 70.29 | 78.57 | 80.89 | 76.66 | 72.72 | a | 66.42 | a | 53.18 | 41.85 | 61.94 | |||||||||
1989 | 41.73 | a | 50.72 | a | 58.68 | a | 67.29 | a | 74.02 | 80.83 | 82.11 | 78.85 | 73.50 | 63.19 | 53.16 | b | 40.39 | 63.71 | ||||||||
1990 | 42.29 | 44.91 | a | 56.21 | b | 66.34 | a | 71.98 | a | 85.52 | 79.63 | e | 76.40 | 73.50 | c | 63.98 | a | 52.38 | 43.42 | a | 63.05 | |||||
1991 | 43.65 | 51.19 | a | 52.87 | d | 63.02 | a | 72.18 | 78.30 | b | 78.87 | a | 79.10 | b | 70.60 | a | 65.82 | a | 51.18 | b | 45.12 | c | 62.66 | |||
1992 | 40.84 | 48.39 | b | 55.58 | a | 66.03 | a | 70.29 | b | 78.38 | a | 82.83 | b | 79.48 | c | 76.48 | b | 65.64 | c | 47.34 | a | 42.84 | c | 62.84 | ||
1993 | 47.31 | 49.28 | c | 56.18 | 62.69 | c | 72.45 | 80.94 | c | 82.95 | b | 80.28 | a | 74.73 | 63.10 | 50.62 | b | 44.72 | a | 63.77 | ||||||
1994 | 44.34 | b | 48.20 | c | 56.29 | e | 64.00 | a | 72.27 | c | 86.09 | b | 84.96 | e | 84.48 | a | 76.54 | b | 64.55 | c | 53.22 | a | 46.72 | a | 65.14 | |
1995 | 44.60 | 54.31 | d | ----- | z | 61.60 | e | 70.90 | 79.14 | a | 82.69 | 82.89 | c | 75.67 | f | 66.02 | a | 55.65 | 46.87 | 64.47 | b | |||||
1996 | 46.50 | d | 54.31 | c | 54.85 | e | 63.93 | c | 76.32 | a | 83.20 | c | 83.62 | a | 79.74 | d | 73.29 | a | 64.77 | c | 53.38 | b | 44.97 | 64.91 | ||
1997 | 43.98 | 48.62 | 58.93 | b | 61.17 | 73.73 | a | 79.84 | b | 82.35 | e | 81.10 | 79.30 | b | 63.66 | b | 52.19 | a | 41.50 | b | 63.86 | |||||
1998 | 46.32 | a | 46.56 | b | 53.87 | 59.25 | b | 72.92 | 79.20 | b | 83.97 | a | 81.13 | a | 79.35 | 65.64 | b | 54.21 | a | 46.07 | b | 64.04 | ||||
1999 | 47.82 | c | 52.87 | a | 58.35 | 62.16 | a | 72.50 | 79.21 | b | 80.88 | b | 80.73 | a | 75.41 | b | 64.35 | a | 55.70 | 43.17 | a | 64.43 | ||||
2000 | 49.34 | 53.09 | 57.12 | b | 68.38 | d | 77.68 | a | 81.05 | 84.35 | 81.18 | 78.35 | 64.16 | b | 47.73 | 44.64 | b | 65.59 | ||||||||
2001 | 42.29 | 50.23 | 56.05 | 65.53 | 75.16 | b | 82.26 | a | 83.38 | b | ----- | z | 76.92 | d | 67.07 | b | 55.67 | a | 42.88 | a | 63.40 | a | ||||
2002 | 45.95 | 48.07 | a | 57.22 | d | 70.31 | a | 73.10 | b | 83.02 | 80.47 | b | 82.29 | b | 76.27 | ----- | z | 53.22 | c | 42.71 | g | 66.99 | b | |||
2003 | ----- | z | ----- | z | 56.23 | a | ----- | z | 75.03 | ----- | z | ----- | z | 80.54 | s | 77.64 | a | 70.98 | 55.84 | a | 44.06 | g | 67.15 | g | ||
2004 | 47.13 | a | 46.04 | c | 59.38 | b | ----- | z | 74.27 | a | ----- | z | 82.50 | a | 80.05 | b | 73.68 | 66.06 | 50.43 | a | 43.70 | a | 62.32 | b | ||
2005 | 48.77 | a | 50.12 | c | 54.92 | 64.16 | a | 73.72 | b | 81.19 | a | 84.92 | a | 80.76 | d | 78.66 | a | 64.35 | a | 54.77 | 47.38 | c | 65.31 | |||
2006 | 48.10 | e | 52.42 | h | ----- | z | 68.44 | f | 77.59 | i | 83.25 | b | 83.77 | c | 78.12 | a | 71.27 | b | 63.11 | c | 55.27 | b | 43.40 | b | 65.78 | d |
2007 | 43.07 | d | 49.50 | d | 57.26 | d | 64.46 | g | 73.00 | h | 80.67 | g | 81.60 | f | 83.11 | d | 77.22 | j | 67.85 | h | 57.30 | g | 45.88 | f | 58.24 | h |
2008 | 45.19 | g | 51.33 | h | 57.42 | g | 64.24 | k | 73.69 | j | 84.30 | h | 79.12 | g | 78.93 | h | 72.41 | g | 64.28 | f | 52.90 | f | 48.16 | f | ----- | z |
2009 | 47.66 | f | 51.71 | g | 58.11 | l | 63.64 | h | 75.40 | g | 79.28 | e | 85.55 | b | 82.45 | c | 74.59 | a | 64.26 | d | 54.19 | c | 43.04 | d | 69.05 | e |
2010 | 41.31 | b | 47.82 | f | 52.87 | h | 64.21 | i | 77.57 | j | 83.28 | e | 81.54 | h | 82.81 | e | 77.74 | i | 67.35 | h | 50.70 | e | 49.00 | 61.42 | g | |
2011 | 42.68 | f | ----- | z | 61.63 | e | 68.71 | i | 73.77 | g | 85.29 | d | 85.66 | c | 85.04 | c | ----- | z | 65.94 | e | 51.69 | c | 40.43 | d | 67.95 | e |
2012 | 47.23 | c | 49.94 | d | 57.66 | ----- | z | ----- | z | 85.64 | a | ----- | z | 83.92 | g | 75.45 | i | ----- | z | ----- | z | ----- | z | 60.12 | h | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 43.81 | 48.65 | 54.95 | 63.15 | 71.84 | 80.57 | 82.64 | 80.47 | 74.79 | 64.54 | 51.83 | 44.07 | 63.54 | |||||||||||||
S.D. | 3.37 | 3.14 | 3.25 | 2.81 | 2.32 | 2.62 | 2.16 | 2.09 | 2.33 | 2.21 | 2.72 | 2.59 | 1.22 | |||||||||||||
SKEW | -0.15 | -0.51 | -0.28 | 0.19 | -0.17 | 0.05 | -0.19 | 0.18 | 0.13 | 0.15 | -0.38 | -0.03 | -0.20 | |||||||||||||
MAX | 49.34 | 56.16 | 63.03 | 70.31 | 77.68 | 86.09 | 87.00 | 85.76 | 79.35 | 70.98 | 58.07 | 49.24 | 65.59 | |||||||||||||
MIN | 36.45 | 37.43 | 46.09 | 56.62 | 65.45 | 74.15 | 76.92 | 76.00 | 70.60 | 59.55 | 44.93 | 37.13 | 60.68 | |||||||||||||
YRS | 60 | 62 | 64 | 59 | 58 | 62 | 61 | 61 | 60 | 64 | 65 | 63 | 39 |