YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 69.00 | 76.22 | a | 73.45 | 67.41 | a | 58.68 | 50.76 | a | 41.68 | 62.46 | e | ||||
1971 | 43.82 | a | 45.39 | 47.89 | 51.45 | b | 56.35 | a | ----- | z | 75.61 | 75.57 | a | 68.77 | b | 53.86 | c | 48.05 | 38.58 | 55.03 | a | |||||
1972 | 41.09 | b | 47.09 | 54.07 | b | 51.95 | b | 61.72 | b | 70.31 | a | 74.41 | c | 73.23 | a | 64.00 | c | 57.43 | c | 46.15 | d | 38.21 | 56.64 | |||
1973 | 41.10 | a | 47.59 | a | 45.41 | b | 55.52 | c | 65.03 | b | 70.25 | d | 75.40 | e | 72.83 | d | 66.90 | a | 57.71 | c | ----- | z | 44.45 | a | 58.38 | a |
1974 | 43.38 | a | 45.30 | e | 49.38 | e | 51.46 | c | 61.00 | c | 69.50 | a | 72.04 | c | 74.65 | g | 71.60 | d | 62.11 | 49.36 | a | 42.61 | 56.16 | a | ||
1975 | 44.02 | d | 44.70 | e | 46.74 | b | 46.72 | e | 59.88 | e | 67.74 | g | 71.77 | c | 70.68 | 71.96 | b | 56.20 | a | 47.12 | a | 45.44 | e | 55.02 | a | |
1976 | 44.34 | b | ----- | z | 46.23 | 50.63 | d | 63.44 | g | 66.46 | g | 74.24 | b | 68.55 | a | 67.60 | a | 60.25 | a | 51.18 | b | 43.31 | m | 57.88 | d | |
1977 | 41.89 | d | ----- | z | ----- | z | ----- | z | 50.73 | p | 73.22 | l | 73.50 | d | 74.13 | a | 66.14 | b | 60.52 | a | 49.48 | c | 47.38 | a | 59.01 | e |
1978 | 47.48 | e | 46.88 | c | 53.39 | c | 51.82 | b | ----- | z | 66.57 | c | 74.23 | c | 73.38 | c | 65.78 | g | 64.14 | f | 47.89 | b | 38.98 | c | 55.63 | c |
1979 | 41.52 | 44.42 | c | 50.40 | b | 52.98 | b | 62.76 | b | 67.69 | a | 72.98 | a | 70.75 | a | ----- | z | 60.28 | b | 48.87 | 46.31 | 56.27 | a | |||
1980 | ----- | z | 48.89 | b | 48.05 | a | 54.25 | f | 58.28 | b | 62.69 | c | 73.12 | a | 70.55 | a | ----- | z | 59.96 | c | ----- | z | 46.95 | 58.56 | d | |
1981 | 47.11 | 47.37 | e | 48.33 | b | 55.87 | 60.72 | d | 71.43 | b | 72.54 | c | 74.08 | e | 69.48 | 55.90 | b | 51.58 | e | 47.21 | 58.47 | |||||
1982 | 40.94 | 47.43 | a | 46.98 | c | 51.95 | a | 63.34 | b | 65.65 | c | 71.69 | d | 73.48 | c | 66.33 | a | 58.57 | a | 46.62 | 44.09 | c | 56.42 | |||
1983 | 46.93 | a | 47.87 | b | 48.39 | 50.05 | b | 60.82 | c | ----- | z | 70.75 | e | ----- | z | 70.07 | b | 61.95 | a | ----- | z | ----- | z | 57.10 | d | |
1984 | ----- | z | 46.13 | c | ----- | z | ----- | z | 64.86 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 55.50 | j |
1985 | ----- | z | 47.57 | a | 44.95 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 46.26 | j |
1986 | ----- | z | ----- | z | 54.21 | n | 53.59 | h | 62.74 | j | 72.06 | l | 72.66 | f | 74.30 | c | 61.80 | e | 61.81 | e | 52.25 | b | 43.86 | c | 58.80 | g |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 70.48 | c | 72.95 | c | 69.14 | b | 65.08 | g | 49.11 | c | 43.67 | d | 61.07 | g |
1988 | ----- | z | 51.24 | j | 53.05 | j | 55.98 | e | 58.42 | e | 67.25 | d | 77.73 | e | 74.02 | f | 70.09 | b | 63.10 | e | 48.59 | b | 43.57 | b | 60.59 | d |
1989 | 42.83 | e | 42.59 | f | 49.76 | b | 58.24 | a | 61.31 | g | 69.15 | f | 74.21 | b | 71.50 | a | 66.25 | 58.08 | a | 51.40 | a | 46.52 | f | 59.03 | d | |
1990 | 44.28 | b | 42.41 | 51.13 | e | 59.57 | c | 60.15 | a | 67.77 | 76.66 | c | 74.22 | b | 69.11 | b | 61.93 | b | 49.40 | 38.88 | a | 57.96 | ||||
1991 | 43.73 | a | 51.80 | a | 44.57 | b | 52.25 | d | 55.86 | f | ----- | z | 77.80 | i | ----- | z | ----- | z | ----- | z | ----- | z | 45.76 | 47.62 | g | |
1992 | 44.28 | h | ----- | z | ----- | z | 56.85 | j | 67.36 | f | ----- | z | ----- | z | 76.28 | b | ----- | z | 63.00 | c | ----- | z | 41.91 | c | 60.40 | i |
1993 | ----- | z | 45.61 | ----- | z | ----- | z | 59.98 | i | 65.94 | e | 71.73 | c | 73.46 | g | 68.66 | h | 61.20 | c | 48.67 | 44.00 | a | 56.19 | f | ||
1994 | 46.00 | d | 45.39 | j | 51.58 | a | 54.42 | f | 60.80 | c | 67.70 | c | 75.21 | c | 73.15 | a | 68.88 | i | 58.78 | a | 43.42 | e | 41.45 | b | 57.57 | c |
1995 | 46.58 | 50.41 | 48.36 | b | 51.80 | c | 58.37 | d | ----- | z | ----- | z | 73.38 | e | 69.25 | b | 62.15 | a | 55.22 | 46.39 | d | 56.19 | b | |||
1996 | 46.05 | a | 50.73 | c | 50.60 | e | 54.92 | 59.20 | a | 69.19 | c | 76.26 | ----- | z | 67.36 | a | ----- | z | 50.70 | 47.11 | d | 57.21 | b | |||
1997 | 45.13 | ----- | z | 52.40 | a | 52.65 | f | 64.88 | b | 68.24 | e | 74.45 | a | 72.16 | b | 68.95 | h | 56.94 | 50.86 | b | 44.70 | a | 58.86 | c | ||
1998 | 45.53 | a | 46.00 | g | 49.89 | d | 51.52 | c | 53.57 | b | 63.79 | b | 74.57 | a | 75.19 | 69.33 | 58.13 | a | 47.72 | 42.65 | a | 57.44 | a | |||
1999 | 45.31 | d | 42.83 | g | 46.05 | 51.79 | a | 58.90 | a | 65.43 | 70.55 | 71.04 | c | 70.03 | n | 62.18 | a | 50.24 | c | 45.83 | a | 56.73 | b | |||
2000 | 45.63 | a | 48.25 | e | 50.48 | c | 57.31 | c | 61.78 | b | 72.12 | b | 70.48 | c | 73.91 | d | 68.64 | b | 57.15 | a | 45.13 | 45.57 | b | 58.04 | ||
2001 | 43.55 | a | 42.08 | d | 52.20 | c | 50.75 | h | 70.20 | i | 72.88 | r | 74.18 | 75.15 | a | 71.07 | 63.39 | 53.23 | d | 44.56 | d | 57.71 | c | |||
2002 | ----- | z | 47.90 | c | 49.12 | b | 56.31 | d | 60.67 | a | 71.21 | a | 76.53 | 73.45 | 70.59 | a | 59.66 | i | ----- | z | 43.96 | e | 61.08 | c | ||
2003 | 50.00 | 45.80 | 49.92 | a | 48.82 | e | 59.77 | a | 70.09 | a | 77.52 | b | 73.06 | 71.33 | 65.86 | b | 46.35 | m | 41.73 | t | 61.22 | b | ||||
2004 | 45.35 | k | 45.67 | h | 57.95 | b | 58.28 | a | 61.29 | b | 69.73 | b | 74.52 | 74.20 | a | 68.52 | c | 59.13 | 49.30 | b | 46.59 | b | 61.95 | b | ||
2005 | 43.17 | m | 50.35 | b | 52.48 | b | 53.10 | a | 60.72 | d | 63.89 | c | 77.30 | a | 74.96 | e | 66.50 | b | 59.43 | h | 53.07 | c | 46.30 | a | 59.87 | b |
2006 | ----- | z | 47.23 | b | 44.21 | 52.06 | f | 63.47 | a | 71.55 | a | 77.16 | c | 72.31 | 68.93 | b | 58.68 | a | 49.64 | a | 44.50 | d | 59.77 | b | ||
2007 | 42.08 | 47.05 | 54.98 | 55.85 | d | 63.10 | b | 68.11 | c | 74.79 | e | 74.95 | a | 65.50 | c | 57.80 | a | 53.75 | b | 42.92 | a | 58.41 | ||||
2008 | 42.39 | d | 46.43 | 51.29 | 54.53 | a | 63.45 | a | 69.43 | b | 75.45 | a | 76.59 | b | 71.48 | 62.13 | ----- | z | 42.42 | a | 59.60 | a | ||||
2009 | 45.57 | h | 47.00 | b | 50.10 | b | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.55 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 44.34 | 47.03 | 49.60 | 53.49 | 60.86 | 68.18 | 74.19 | 73.34 | 68.40 | 59.83 | 49.61 | 43.89 | 57.66 | |||||||||||||
S.D. | 2.30 | 2.28 | 3.17 | 3.13 | 2.64 | 2.56 | 2.17 | 1.79 | 2.41 | 2.66 | 2.62 | 2.58 | 0.90 | |||||||||||||
SKEW | 0.37 | -0.06 | 0.38 | 0.07 | -0.58 | -0.47 | -0.20 | -0.55 | -0.71 | -0.01 | -0.11 | -0.72 | -0.57 | |||||||||||||
MAX | 50.00 | 51.80 | 57.95 | 59.57 | 65.03 | 72.12 | 77.73 | 76.59 | 71.96 | 65.86 | 55.22 | 47.38 | 58.47 | |||||||||||||
MIN | 40.94 | 42.08 | 44.21 | 46.72 | 53.57 | 62.69 | 70.48 | 68.55 | 61.80 | 53.86 | 43.42 | 38.21 | 56.42 | |||||||||||||
YRS | 26 | 27 | 32 | 26 | 27 | 25 | 33 | 31 | 28 | 31 | 29 | 33 | 6 |