YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1968 | 24.71 | 25.05 | 42.23 | 52.02 | b | 55.65 | 67.68 | 70.84 | 71.79 | 65.05 | a | 53.92 | 42.64 | b | 28.42 | a | 50.00 | |||||||||
1969 | 25.68 | 27.91 | 35.84 | b | 52.97 | 61.66 | 69.22 | 70.39 | 68.95 | 62.74 | a | 52.06 | 38.57 | a | 25.73 | 49.31 | ||||||||||
1970 | 20.74 | 28.43 | 34.48 | f | 49.20 | 63.39 | 68.05 | a | 71.45 | 71.81 | 67.47 | 55.31 | 44.16 | a | 32.23 | a | 52.02 | a | ||||||||
1971 | 25.32 | 31.23 | 36.92 | 49.52 | 58.52 | 69.65 | 70.79 | 69.27 | 66.32 | 58.60 | 42.07 | 38.98 | 51.43 | |||||||||||||
1972 | 31.85 | 28.40 | 37.48 | 49.43 | 59.73 | 64.67 | 71.58 | 69.60 | 65.52 | a | 48.90 | 38.32 | 37.21 | 50.22 | ||||||||||||
1973 | 33.08 | 30.34 | 45.77 | 49.57 | 57.45 | 70.47 | 72.56 | 71.88 | a | 65.65 | 55.97 | 45.38 | 33.61 | 52.65 | ||||||||||||
1974 | 35.44 | 30.66 | 41.48 | 54.02 | 59.00 | 65.07 | 72.06 | 70.50 | 61.45 | 51.56 | 43.90 | 34.90 | 51.67 | |||||||||||||
1975 | 33.08 | 33.54 | a | 36.47 | 44.63 | 63.16 | 67.31 | a | 71.08 | 71.53 | 59.62 | 57.25 | a | 48.77 | 31.90 | 51.53 | ||||||||||
1976 | 25.32 | 38.90 | 44.16 | 53.47 | a | 58.13 | a | 70.13 | 69.55 | 68.56 | 62.79 | a | 48.61 | 37.48 | 28.08 | 50.43 | ||||||||||
1977 | 16.97 | a | 31.71 | 45.77 | a | 54.48 | 64.81 | 66.14 | b | 74.27 | a | 71.26 | 65.80 | 51.48 | a | 44.95 | k | 30.21 | 52.08 | a | ||||||
1978 | 22.74 | 21.50 | 34.95 | 49.12 | 58.69 | 67.22 | a | 69.38 | a | 72.17 | a | 64.95 | 52.24 | 45.29 | a | 34.52 | a | 49.40 | ||||||||
1979 | 25.66 | 20.50 | a | 43.98 | 49.35 | 60.26 | 65.43 | b | 68.61 | 69.07 | a | 62.67 | 51.55 | a | 47.23 | 35.63 | 50.00 | |||||||||
1980 | 28.44 | 26.62 | 36.90 | 50.55 | 63.21 | 65.58 | 72.87 | 72.40 | 67.28 | 50.95 | c | 39.98 | d | 31.47 | 50.52 | |||||||||||
1981 | 23.71 | 35.30 | a | 37.63 | 54.68 | 60.42 | 69.23 | 70.77 | 68.70 | a | 62.32 | 50.69 | 42.95 | 29.53 | 50.49 | |||||||||||
1982 | 21.62 | b | 31.27 | 39.18 | a | 48.68 | 64.23 | a | 64.95 | 72.27 | 68.37 | a | 63.71 | a | 54.92 | a | 45.59 | c | 39.64 | b | 51.20 | |||||
1983 | 29.98 | 32.41 | a | 41.58 | a | 47.66 | a | 59.52 | 68.28 | a | 73.81 | 73.32 | 65.80 | 54.05 | 44.36 | a | 26.59 | c | 51.45 | |||||||
1984 | 26.58 | a | 37.07 | 33.76 | b | 48.23 | b | 59.48 | b | 69.58 | 69.50 | b | 70.23 | a | 62.05 | 58.80 | a | 40.28 | a | 41.34 | b | 51.41 | ||||
1985 | 24.07 | b | 29.80 | c | 42.07 | a | 55.95 | 62.55 | b | 65.73 | 70.89 | 68.73 | 65.22 | 54.91 | b | 47.73 | 28.87 | 51.38 | ||||||||
1986 | 29.66 | 29.07 | 41.73 | 51.98 | c | 63.48 | a | 69.18 | 73.31 | 68.74 | b | 64.82 | 55.21 | 41.06 | d | 33.37 | 51.80 | |||||||||
1987 | 28.73 | a | 30.77 | 43.17 | a | 50.55 | b | 62.60 | a | 70.74 | a | 74.80 | a | 71.87 | a | 64.88 | a | 49.74 | 45.98 | c | 35.07 | a | 52.41 | |||
1988 | 26.08 | 30.86 | a | 42.08 | 49.50 | 61.28 | a | 69.43 | a | 75.19 | b | 74.11 | c | 62.23 | 48.68 | 44.67 | a | 31.90 | a | 51.33 | ||||||
1989 | 36.69 | b | 31.79 | 39.28 | d | 48.96 | b | 59.10 | b | 69.65 | d | 71.13 | 69.61 | 63.73 | d | 56.05 | a | 41.62 | f | 21.03 | a | 51.55 | a | |||
1990 | 38.21 | b | 39.04 | 45.40 | a | 51.50 | b | 58.00 | a | 68.41 | a | 71.58 | 69.39 | 62.85 | 57.06 | 46.76 | a | 38.10 | b | 53.86 | ||||||
1991 | 30.80 | a | 36.67 | b | 42.82 | 53.03 | a | 67.87 | a | 70.35 | 74.22 | a | 73.31 | ----- | z | ----- | z | ----- | z | 36.79 | 53.98 | c | ||||
1992 | 31.20 | d | 34.40 | c | 38.10 | 50.80 | 58.36 | b | 65.52 | 71.37 | 67.23 | 62.83 | a | 51.68 | 41.43 | a | 31.85 | 50.40 | ||||||||
1993 | 33.29 | c | 27.17 | a | 36.03 | b | 51.90 | d | 63.47 | a | 68.52 | c | 74.52 | 72.08 | a | 63.84 | b | 52.55 | 43.92 | 31.47 | a | 51.56 | ||||
1994 | 21.74 | b | 28.79 | b | 37.10 | b | 57.34 | a | 57.81 | 71.86 | b | 73.38 | a | 68.05 | a | 63.28 | 54.63 | 48.41 | c | 39.44 | 51.82 | |||||
1995 | 31.71 | c | 28.59 | 43.63 | 50.50 | 60.10 | 69.09 | a | 74.66 | 74.16 | ----- | z | 57.34 | b | 37.02 | a | 28.07 | c | 50.44 | a | ||||||
1996 | 27.59 | b | 30.93 | 36.05 | 53.09 | c | 58.56 | 70.74 | a | 70.52 | a | 70.19 | 64.20 | 54.15 | 37.82 | 36.02 | a | 50.82 | ||||||||
1997 | 29.63 | a | 36.45 | 41.85 | 48.72 | 57.44 | 68.25 | 72.52 | 70.44 | 64.42 | 54.35 | a | 40.12 | 35.48 | 51.64 | |||||||||||
1998 | 37.41 | b | 37.59 | a | 42.73 | 53.66 | a | 64.47 | 67.24 | a | 72.61 | 72.57 | a | 69.55 | a | 55.48 | 46.50 | a | 39.86 | b | 54.97 | |||||
1999 | 31.61 | 35.59 | 38.42 | a | 52.68 | 62.65 | 68.75 | 76.85 | 71.75 | a | 64.53 | a | 53.27 | a | 49.50 | 36.64 | b | 53.52 | ||||||||
2000 | 29.52 | a | 36.53 | 46.94 | 50.87 | 63.45 | a | 70.08 | 68.98 | a | 68.97 | 64.45 | 58.48 | b | 40.89 | b | 24.79 | 52.00 | ||||||||
2001 | 29.35 | 34.96 | a | 36.82 | 55.07 | 60.88 | a | 70.40 | a | 70.08 | 73.97 | 64.17 | 56.88 | a | 50.77 | 39.02 | 53.53 | |||||||||
2002 | 38.39 | 38.23 | b | 43.77 | a | 54.28 | a | 60.61 | 70.70 | 74.90 | 73.90 | 67.28 | 52.15 | a | 42.25 | 31.45 | a | 53.99 | ||||||||
2003 | 25.11 | 26.96 | a | 40.97 | 52.88 | b | 58.34 | 66.10 | 69.97 | a | 70.08 | a | 61.35 | 49.90 | 48.10 | 33.00 | 50.23 | |||||||||
2004 | 23.21 | b | 31.81 | 44.00 | a | 53.24 | c | 67.21 | 67.34 | a | 72.35 | a | 70.89 | 66.24 | a | 54.22 | a | 46.53 | 34.09 | b | 52.59 | |||||
2005 | 30.21 | c | 34.11 | a | 35.73 | 54.42 | 57.62 | a | 71.23 | 74.40 | 73.97 | b | 68.57 | 55.27 | 46.39 | b | 29.63 | 52.63 | ||||||||
2006 | 37.97 | a | 33.37 | a | 41.40 | 54.35 | 61.10 | a | 68.84 | a | ----- | z | 74.95 | 62.45 | a | 53.58 | a | 46.70 | b | 41.63 | 52.39 | a | ||||
2007 | 35.80 | a | 23.44 | a | 42.71 | 49.86 | b | 64.24 | b | ----- | z | 72.70 | a | 73.23 | a | 68.53 | 61.74 | b | 43.12 | b | 34.25 | c | 51.79 | a | ||
2008 | 33.26 | b | 31.91 | 41.46 | d | 55.48 | 59.95 | a | 72.68 | 74.48 | b | 70.37 | 66.50 | 53.93 | a | 42.19 | c | 34.09 | t | 54.75 | a | |||||
2009 | 25.05 | 33.75 | 42.11 | 54.10 | 62.15 | 69.65 | 70.56 | 73.85 | 63.63 | 52.79 | 47.82 | ----- | z | 54.13 | a | |||||||||||
2010 | 28.45 | 27.96 | 45.94 | d | 58.97 | 64.16 | 72.53 | 76.56 | g | ----- | z | 67.30 | 55.42 | ----- | z | 28.71 | 49.94 | c | ||||||||
2011 | 27.50 | i | 35.25 | ----- | z | ----- | z | 62.20 | d | 70.72 | 76.70 | p | 71.56 | 65.78 | 52.55 | 48.48 | 39.15 | 55.71 | d | |||||||
2012 | 34.31 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 34.31 | k | |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 29.09 | 31.51 | 40.63 | 51.89 | 61.07 | 68.66 | 72.14 | 71.10 | 64.61 | 53.93 | 44.03 | 33.33 | 51.58 | |||||||||||||
S.D. | 5.20 | 4.45 | 3.52 | 2.86 | 2.76 | 2.11 | 1.98 | 2.02 | 2.16 | 2.93 | 3.63 | 4.79 | 1.36 | |||||||||||||
SKEW | -0.01 | -0.39 | -0.15 | 0.06 | 0.35 | -0.23 | 0.25 | 0.09 | 0.16 | 0.25 | -0.24 | -0.29 | 0.54 | |||||||||||||
MAX | 38.39 | 39.04 | 46.94 | 58.97 | 67.87 | 72.68 | 76.85 | 74.95 | 69.55 | 61.74 | 50.77 | 41.63 | 54.97 | |||||||||||||
MIN | 16.97 | 20.50 | 33.76 | 44.63 | 55.65 | 64.67 | 68.61 | 67.23 | 59.62 | 48.61 | 37.02 | 21.03 | 49.31 | |||||||||||||
YRS | 44 | 44 | 42 | 43 | 44 | 43 | 41 | 43 | 42 | 43 | 40 | 42 | 33 |